@import url('https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

@tailwind base;
@tailwind components;
@tailwind utilities;

/* Vue transition helpers */
@layer components {
  .modal-fade-enter-active,
  .modal-fade-leave-active { @apply transition-opacity duration-200; }
  .modal-fade-enter-from,
  .modal-fade-leave-to { @apply opacity-0; }

  .modal-enter-active,
  .modal-leave-active { @apply transition-opacity duration-150 ease-out; }
  .modal-enter-from,
  .modal-leave-to { @apply opacity-0; }

  .popup-fade-enter-active,
  .popup-fade-leave-active { @apply transition-all duration-150; }
  .popup-fade-enter-from,
  .popup-fade-leave-to { @apply scale-95 opacity-0; }

  .dropdown-enter-active,
  .dropdown-leave-active { @apply transition-all duration-150 ease-out; }
  .dropdown-enter-from,
  .dropdown-leave-to { @apply scale-[0.97] opacity-0 -translate-y-1.5; }

  .toast-enter-active,
  .toast-leave-active { @apply transition-all duration-300 ease-out; }
  .toast-enter-from,
  .toast-leave-to { @apply translate-x-2 opacity-0; }

  .study-fade-enter-active,
  .study-fade-leave-active { @apply transition-all duration-200; }
  .study-fade-enter-from,
  .study-fade-leave-to { @apply scale-[0.97] opacity-0; }

  .fade-colors-enter-active,
  .fade-colors-leave-active { @apply transition-all duration-200; }
  .fade-colors-enter-from,
  .fade-colors-leave-to { @apply -translate-x-1.5 opacity-0; }

  .slide-right-enter-active,
  .slide-right-leave-active { @apply transition-transform duration-[250ms] ease-out; }
  .slide-right-enter-from,
  .slide-right-leave-to { @apply translate-x-full; }

  .slide-x-enter-active,
  .slide-x-leave-active { @apply transition-all duration-150; }
  .slide-x-enter-from,
  .slide-x-leave-to { @apply -translate-x-2 opacity-0; }
}

/* Dynamic HTML highlights (reading / speaking / vocab) */
@layer components {
  .hl-grammar-error { @apply rounded-sm bg-red-200 px-0.5 text-red-900; }
  .hl-vocab-weak { @apply rounded-sm bg-yellow-200 px-0.5 text-yellow-900; }
  .hl-vocab-strong { @apply rounded-sm bg-green-200 px-0.5 text-green-900; }
  .vocab-blank { @apply inline-block min-w-[60px] border-b-2 border-emerald-400; }

  /* Gap fill inputs (GapFillingHtml dynamic DOM) */
  .gap-wrapper { @apply inline-flex items-center gap-0.5 align-baseline; }
  .gap-num {
    @apply inline-flex h-[18px] min-w-[18px] shrink-0 items-center justify-center rounded-full bg-emerald-400 text-[10px] font-bold leading-none text-white align-middle;
  }
  .gap-input {
    @apply inline-block max-w-[160px] min-w-[88px] border-0 border-b-2 border-b-neutral-900 bg-transparent px-1 pb-0.5 pt-px align-baseline font-[inherit] text-sm text-neutral-900 outline-none transition-colors duration-150;
  }
  .gap-input:focus { @apply border-b-emerald-400; }
  .gap-input:disabled { @apply cursor-not-allowed opacity-60; }
}

/* Modal with sliding panel */
.modal-enter-active .modal-box,
.modal-leave-active .modal-box { @apply transition-transform duration-200; }
.modal-enter-from .modal-box,
.modal-leave-to .modal-box { @apply translate-y-2.5; }

@layer utilities {
  .scrollbar-hide {
    -ms-overflow-style: none;
    scrollbar-width: none;
  }
  .scrollbar-hide::-webkit-scrollbar {
    display: none;
  }
}

/* ═══════════════════════════════════════════════════════════
   LinguaIELTS — Spotify-inspired design tokens (DESIGN.md)
═══════════════════════════════════════════════════════════ */
:root {
  /* §2 Primary brand */
  --spotify-green:       #1ed760;
  --spotify-green-dark:  #1db954;
  --bg-base:             #121212;
  --bg-surface:          #181818;
  --bg-interactive:      #1f1f1f;

  /* §2 Text */
  --text-base:           #ffffff;
  --text-subdued:        #b3b3b3;
  --text-bright:         #cbcbcb;
  --text-emphasis:       #fdfdfd;

  /* §2 Semantic */
  --text-negative:       #f3727f;
  --text-warning:        #ffa42b;
  --text-announcement:   #539df5;

  /* §2 Surface & border */
  --surface-card:        #252525;
  --surface-card-alt:    #272727;
  --border-button:       #4d4d4d;
  --border-outlined:     #7c7c7c;
  --separator:           #b3b3b3;
  --surface-light:       #eeeeee;

  /* §6 Shadows */
  --shadow-heavy:        rgba(0, 0, 0, 0.5) 0px 8px 24px;
  --shadow-medium:       rgba(0, 0, 0, 0.3) 0px 8px 8px;
  --shadow-inset-border: rgb(18, 18, 18) 0px 1px 0px, rgb(124, 124, 124) 0px 0px 0px 1px inset;

  /* §5 Border radius scale */
  --radius-minimal:      2px;
  --radius-subtle:       4px;
  --radius-standard:     6px;
  --radius-comfortable:  8px;
  --radius-panel:        10px;
  --radius-large:        100px;
  --radius-pill:         500px;
  --radius-full-pill:    9999px;
  --radius-circle:       50%;

  /* §3 Typography scale */
  --text-section-title:  1.5rem;
  --text-feature:        1.125rem;
  --text-body:           1rem;
  --text-button:         0.875rem;
  --text-caption:        0.875rem;
  --text-small:          0.75rem;
  --text-badge:          0.66rem;
  --text-micro:          0.625rem;
  --tracking-button:     1.4px;
  --tracking-button-wide: 2px;

  /* §3 Font families — Open Sans */
  --font-title: 'Open Sans', 'Helvetica Neue', helvetica, arial, sans-serif;
  --font-body:  'Open Sans', 'Helvetica Neue', helvetica, arial, sans-serif;
  --font-mono:  'Consolas', 'Courier New', monospace;

  /* Layout */
  --container-max:       1200px;
  --navbar-height:       64px;
  --section-padding-y:   80px;
  --transition-base:     0.2s ease;

  /* ── Legacy aliases (keep components working) ── */
  --accent:    var(--spotify-green);
  --bg:        var(--bg-base);
  --bg2:       var(--bg-interactive);
  --surface:   var(--bg-surface);
  --surface2:  var(--surface-card);
  --border:    var(--border-button);
  --border2:   var(--border-outlined);
  --ink:       var(--text-base);
  --ink2:      var(--text-subdued);
  --ink3:      var(--text-bright);
  --purple:    var(--spotify-green);
  --purple-l:  var(--spotify-green);
  --purple-d:  var(--spotify-green-dark);
  --purple-bg: rgba(30, 215, 96, 0.12);
  --green:     var(--spotify-green-dark);
  --green-l:   var(--spotify-green);
  --green-bg:  rgba(30, 215, 96, 0.12);
  --amber:     var(--text-warning);
  --amber-l:   var(--text-warning);
  --amber-bg:  rgba(255, 164, 43, 0.12);
  --blue:      var(--text-announcement);
  --blue-l:    var(--text-announcement);
  --blue-bg:   rgba(83, 157, 245, 0.12);
  --rose:      var(--text-negative);
  --rose-l:    var(--text-negative);
  --rose-bg:   rgba(243, 114, 127, 0.12);
  --violet:    var(--spotify-green);
  --violet-l:  var(--spotify-green);
  --violet-bg: rgba(30, 215, 96, 0.12);
  --gold:      var(--text-warning);
  --gold-l:    var(--text-warning);
  --gold-bg:   rgba(255, 164, 43, 0.12);
  --shadow-sm: var(--shadow-medium);
  --shadow:    var(--shadow-medium);
  --shadow-lg: var(--shadow-heavy);
  --r:         var(--radius-comfortable);
  --r-sm:      var(--radius-standard);
  --r-lg:      var(--radius-panel);
  --font-display: var(--font-title);

  /* Semantic surfaces */
  --bubble-assistant-bg: var(--surface-card);
  --bubble-user-bg:    var(--spotify-green);
  --bubble-user-text:  #000000;
  --header-accent-bg:  rgba(30, 215, 96, 0.12);

  /* Catbot — aligned with page theme (not inverted) */
  --catbot-header-bg:    color-mix(in srgb, var(--spotify-green) 14%, var(--bg-surface));
  --catbot-title-color:  var(--text-base);
  --catbot-subtitle-color: var(--text-subdued);
  --catbot-bubble-assistant-bg: var(--bg-interactive);
  --catbot-bubble-assistant-text: var(--text-base);

  /* Alternating page sections (dark defaults) */
  --section-white:       var(--bg-surface);
  --section-cream:       var(--bg-interactive);
  --section-sky:         var(--surface-card);
  --hero-bg:             var(--bg-interactive);
  --hero-heading:        var(--text-base);
  --hero-subtitle:       var(--text-subdued);
  --cta-accent:          var(--spotify-green);
  --cta-accent-text:     #000000;
}

/* ─── Light theme ─── */
[data-theme="light"] {
  --bg-base:             #f5f5f5;
  --bg-surface:          #ffffff;
  --bg-interactive:      #eeeeee;
  --text-base:           #121212;
  --text-subdued:        #6a6a6a;
  --text-bright:         #535353;
  --text-emphasis:       #000000;
  --surface-card:        #ffffff;
  --surface-card-alt:    #fafafa;
  --border-button:       #e5e7eb;
  --border-outlined:     #d1d5db;
  --separator:           #9ca3af;
  --shadow-heavy:        rgba(0, 0, 0, 0.12) 0px 8px 24px;
  --shadow-medium:       rgba(0, 0, 0, 0.08) 0px 4px 12px;
  --shadow-inset-border: rgb(255, 255, 255) 0px 1px 0px, rgb(209, 213, 219) 0px 0px 0px 1px inset;
  --purple-bg: rgba(30, 215, 96, 0.1);
  --green-bg:  rgba(30, 215, 96, 0.1);
  --amber-bg:  rgba(255, 164, 43, 0.1);
  --blue-bg:   rgba(83, 157, 245, 0.1);
  --rose-bg:   rgba(243, 114, 127, 0.1);
  --violet-bg: rgba(30, 215, 96, 0.1);
  --gold-bg:   rgba(255, 164, 43, 0.1);
  --bubble-assistant-bg: #ffffff;
  --bubble-user-bg:    var(--spotify-green);
  --bubble-user-text:  #000000;
  --header-accent-bg:  rgba(30, 215, 96, 0.08);
  --catbot-header-bg:    color-mix(in srgb, var(--spotify-green) 10%, var(--bg-surface));
  --catbot-title-color:  var(--text-base);
  --catbot-subtitle-color: var(--text-subdued);
  --catbot-bubble-assistant-bg: color-mix(in srgb, var(--spotify-green) 8%, var(--bg-surface));
  --catbot-bubble-assistant-text: var(--text-base);
  --section-white:       #ffffff;
  --section-cream:       #eeeeee;
  --section-sky:         #eeeeee;
  --hero-bg:             var(--bg-surface);
  --hero-heading:        var(--text-base);
  --hero-subtitle:       var(--text-subdued);
  --cta-accent:          var(--spotify-green);
  --cta-accent-text:     #000000;
  --border-button:       #121212;
  --border-outlined:     #292929;
}

html {
  color-scheme: dark;
}
[data-theme="light"] {
  color-scheme: light;
}

/* ─── RESET ─── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { font-size: 16px; }

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 400;
  line-height: normal;
  background: var(--bg-base);
  color: var(--text-base);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* §3 Typography base */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  font-weight: 600;
  color: var(--text-base);
  line-height: normal;
}
[data-theme="light"] h1,
[data-theme="light"] h2,
[data-theme="light"] h3,
[data-theme="light"] h4,
[data-theme="light"] h5,
[data-theme="light"] h6 {
  color: var(--text-emphasis);
}

/* Inline page header (no colored hero band) */
.page-header {
  margin-bottom: 1.5rem;
}
.page-header h1 {
  font-family: var(--font-display);
  font-size: var(--text-section-title);
  font-weight: 700;
  color: var(--ink);
  line-height: normal;
}
.page-header .page-subtitle {
  font-size: var(--text-caption);
  color: var(--ink2);
  margin-top: 4px;
}
.page-header--row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
}

/* Spotify-style unified panels */
.hub-page {
  margin: -16px -16px 0;
  width: calc(100% + 32px);
}
@media (min-width: 768px) {
  .hub-page {
    margin: -24px -24px 0;
    width: calc(100% + 48px);
  }
}
.spotify-panel {
  border-radius: var(--radius-panel);
  border: 1px solid var(--border-button);
  background: var(--bg-surface);
  overflow: hidden;
  box-shadow: var(--shadow-medium);
}
.spotify-panel__header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border-button);
}
.spotify-panel__tabs {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-button);
  background: var(--bg-base);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.spotify-panel__tabs > .inline-flex {
  min-width: max-content;
}
.spotify-panel__body {
  padding: 20px 24px 24px;
  background: var(--bg-base);
}
.hub-card-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px 20px 20px;
}
.stat-pill-inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: var(--radius-large);
  border: 1px solid var(--border-button);
  background: var(--bg-interactive);
  padding: 6px 12px;
  font-size: 12px;
  color: var(--ink2);
}
.stat-pill-inline strong { color: var(--ink); }
h1 { font-size: var(--text-section-title); }
h2 { font-size: var(--text-feature); font-weight: 600; line-height: 1.3; }
h3 { font-size: var(--text-body); font-weight: 700; }
p, li { font-size: var(--text-body); color: var(--text-base); }
small, .text-caption { font-size: var(--text-caption); color: var(--text-subdued); }
a { color: var(--text-subdued); transition: color var(--transition-base); }
a:hover { color: var(--text-base); }

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink3); }

/* ─── ANIMATIONS ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes pulse-idle {
  0%, 100% { box-shadow: 0 0 0 0 rgba(224,87,128,0.4); }
  50%       { box-shadow: 0 0 0 14px rgba(224,87,128,0); }
}

@keyframes pulse-record {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,59,59,0.5); }
  50%       { box-shadow: 0 0 0 20px rgba(255,59,59,0); }
}

@keyframes waveBar {
  0%, 100% { transform: scaleY(0.3); }
  50%       { transform: scaleY(1); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── PAGE TRANSITION ─── */
.page-enter-active { animation: fadeUp 0.3s ease both; }
.page-leave-active { animation: fadeIn 0.15s ease reverse both; }

/* ─── FLASHCARD ─── */
.flashcard-container {
  perspective: 1200px;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.flashcard-inner.flipped {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--r);
  overflow: hidden;
}

.card-back-face {
  transform: rotateY(180deg);
}

/* ─── WAVEFORM ─── */
.waveform-bar {
  flex: 1;
  border-radius: 2px;
  background: rgba(255,255,255,0.2);
  transition: background 0.15s;
  min-height: 4px;
  transform-origin: bottom;
}

.waveform-bar.played  { background: var(--green-l); }
.waveform-bar.current { background: white; }
.waveform-bar.playing {
  animation: waveBar 0.6s ease-in-out infinite;
}

/* ─── RECORD BUTTON ─── */
.record-btn-idle {
  animation: pulse-idle 2.5s infinite;
}

.record-btn-active {
  background: #ff3b3b !important;
  animation: pulse-record 1s infinite;
}

/* ─── HEATMAP ─── */
.heatmap-day {
  aspect-ratio: 1;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  background: var(--bg2);
  color: var(--ink3);
  position: relative;
}
.heatmap-day:hover { transform: scale(1.12); z-index: 2; }
.heatmap-day.empty { opacity: 0; pointer-events: none; }
.heatmap-day.today { background: var(--ink); color: white; font-weight: 700; }
.heatmap-day.done-1 { background: #bbf7d0; color: var(--green); }
.heatmap-day.done-2 { background: var(--green-l); color: white; }
.heatmap-day.done-3 { background: var(--green); color: white; }

/* ─── AUDIO CONTROLS ─── */
.ctrl-btn {
  @apply flex h-9 w-9 shrink-0 cursor-pointer items-center justify-center rounded-full border-0 text-[15px] text-white transition-colors;
  background: rgba(255,255,255,0.12);
}
.ctrl-btn:hover { background: rgba(255,255,255,0.22); }
.ctrl-btn.play {
  @apply h-11 w-11;
  background: var(--green-l);
}
.ctrl-btn.play:hover { background: #3da771; }

.transcript-html mark { font-weight: 600; }

/* ─── PROGRESS SHIMMER ─── */
.progress-fill-shimmer {
  @apply relative overflow-hidden;
}
.progress-fill-shimmer::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 200%; height: 100%;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.15) 50%, transparent 100%);
  animation: shimmer 2s infinite;
}
@keyframes shimmer { to { left: 100%; } }

/* ─── WORD HIGHLIGHT ─── */
.hl-yellow { background: #fef08a; border-radius: 2px; }
.hl-green  { background: #bbf7d0; border-radius: 2px; }
.hl-rose   { background: #fecdd3; border-radius: 2px; }

/* ─── DISPLAY FONT ─── */
.font-display { font-family: var(--font-display); }
.font-mono    { font-family: var(--font-mono); }

/* ─── §4 Cards ─── */
.ct-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-button);
  border-radius: var(--radius-comfortable);
  box-shadow: var(--shadow-medium);
  transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}
.ct-card:hover {
  background: var(--bg-interactive);
  box-shadow: var(--shadow-heavy);
  transform: translateY(-2px);
}

/* ─── §4 Badges ─── */
.ct-badge {
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-full-pill);
  padding: 2px 10px;
  font-size: var(--text-badge);
  font-weight: 600;
  line-height: 1.33;
  text-transform: capitalize;
  background: rgba(30, 215, 96, 0.15);
  color: var(--spotify-green);
}
.ct-badge-black {
  background: var(--bg-interactive);
  color: var(--text-base);
}
.ct-badge-gray {
  background: var(--surface-card);
  color: var(--text-subdued);
}

/* ─── §4 Buttons ─── */
.ct-btn,
.btn,
.sh-btn,
.sh-tab,
.theme-toggle-btn,
.history-filter-btn {
  transition: var(--transition-base);
}

.ct-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: var(--radius-full-pill);
  padding: 8px 16px;
  font-size: var(--text-button);
  font-weight: 700;
  letter-spacing: 0.14px;
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
  border: 1px solid transparent;
  background: var(--bg-interactive);
  color: var(--text-subdued);
}
.ct-btn:hover {
  background: var(--surface-card);
  color: var(--text-base);
}
.ct-btn-primary {
  background: var(--spotify-green);
  color: #000000;
  border-color: transparent;
  text-transform: uppercase;
  letter-spacing: var(--tracking-button);
}
.ct-btn-primary:hover {
  background: var(--spotify-green-dark);
  color: #000000;
  transform: scale(1.02);
}
.ct-btn-outline {
  background: transparent;
  color: var(--text-base);
  border: 1px solid var(--border-outlined);
}
.ct-btn-outline:hover {
  background: var(--bg-interactive);
  border-color: var(--text-base);
}

/* ─── §4 Inputs ─── */
.ct-input {
  border: none;
  border-radius: var(--radius-pill);
  padding: 12px 20px;
  font-size: var(--text-button);
  outline: none;
  font-family: var(--font-body);
  background: var(--bg-interactive);
  color: var(--text-base);
  box-shadow: var(--shadow-inset-border);
  transition: box-shadow var(--transition-base), outline var(--transition-base);
}
.ct-input:focus {
  outline: 1px solid var(--text-base);
  box-shadow: var(--shadow-inset-border);
}
.ct-input::placeholder { color: var(--text-subdued); }

/* ─── SELECT (SaveWordDialog) ─── */
.ct-select {
  width: 100%;
  cursor: pointer;
  appearance: none;
  border: none;
  border-radius: var(--radius-pill);
  background: var(--bg-interactive) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23b3b3b3' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 16px center;
  padding: 12px 40px 12px 16px;
  font-size: var(--text-button);
  font-family: inherit;
  font-weight: 500;
  color: var(--text-base);
  outline: none;
  box-shadow: var(--shadow-inset-border);
  transition: box-shadow var(--transition-base), outline var(--transition-base);
}
.ct-select:focus { outline: 1px solid var(--text-base); }
.ct-select:disabled { cursor: not-allowed; opacity: 0.55; }

/* ─── LEGACY COMPAT: .card, .btn ─── */
.card {
  background: var(--bg-surface);
  border: none;
  border-radius: var(--radius-comfortable);
  box-shadow: var(--shadow-medium);
  transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}
.card:hover {
  background: var(--bg-interactive);
  box-shadow: var(--shadow-heavy);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: var(--radius-full-pill);
  padding: 8px 16px;
  font-size: var(--text-button);
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
  background: var(--bg-interactive);
  color: var(--text-subdued);
}
.btn-primary {
  background: var(--spotify-green);
  color: #000000;
  text-transform: uppercase;
  letter-spacing: var(--tracking-button);
}
.btn-primary:hover {
  background: var(--spotify-green-dark);
  transform: scale(1.02);
}
.btn-secondary {
  background: transparent;
  color: var(--text-base);
  border: 1px solid var(--border-outlined);
}
.btn-secondary:hover { background: var(--bg-interactive); }
.btn-danger {
  background: transparent;
  color: var(--text-negative);
  border: 1px solid var(--text-negative);
}
.btn-danger:hover { background: var(--rose-bg); }
.btn-sm { padding: 5px 12px; font-size: var(--text-small); }
.btn-lg { padding: 12px 32px; font-size: var(--text-body); }

/* ─── PAGE WRAPPER ─── */
.page-wrapper {
  padding: 24px;
}
@media (min-width: 640px) {
  .page-wrapper { padding: 32px; }
}
@media (min-width: 1024px) {
  .page-wrapper { padding: 40px; }
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Layout shell (DESIGN.md §5) */
.app-container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.app-navbar {
  height: var(--navbar-height);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-button);
}

/* Page sections — alternating surfaces (white → cream → sky in light) */
.section-base {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
  background: var(--bg-base);
}
.section-surface {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
  background: var(--bg-surface);
}
.section-elevated {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
  background: var(--bg-interactive);
}
.section-white {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
  background: var(--section-white);
}
.section-cream {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
  background: var(--section-cream);
}
.section-sky {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
  background: var(--section-sky);
}
.section-hero {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
  background: var(--hero-bg);
  color: var(--text-base);
}
.section-hero h1,
.section-hero h2 {
  color: var(--text-base);
  font-size: var(--text-section-title);
  font-weight: 700;
  line-height: normal;
}
.section-hero .hero-subtitle {
  font-size: var(--text-caption);
  color: var(--text-subdued);
  margin-top: 4px;
}
.section-hero .btn-primary,
.section-hero .ct-btn-primary,
.section-hero .btn-hero-cta {
  background: var(--cta-accent);
  color: var(--cta-accent-text);
  font-size: var(--text-button);
  font-weight: 700;
  letter-spacing: var(--tracking-button);
  transition: var(--transition-base);
}
.section-hero .btn-primary:hover,
.section-hero .ct-btn-primary:hover,
.section-hero .btn-hero-cta:hover {
  filter: brightness(1.06);
}

/* App shells — tighter rhythm than marketing pages */
.section-compact {
  padding-top: 48px;
  padding-bottom: 48px;
}
.section-hero.section-compact h1 {
  font-size: var(--text-section-title);
}

/* Wave divider between sections */
.wave-divider {
  display: block;
  width: 100%;
  height: 48px;
  line-height: 0;
  overflow: hidden;
}
.wave-divider svg {
  display: block;
  width: 100%;
  height: 48px;
}

/* Quiz / practice exam shell — header + body share same horizontal rhythm */
.exam-container {
  width: 100%;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}
@media (min-width: 640px) {
  .exam-container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}
@media (min-width: 1024px) {
  .exam-container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

/* ─── SLIDE TRANSITION (Quiz / WritingEditor) ─── */
.slide-enter-active, .slide-leave-active { transition: all 0.2s ease; }
.slide-enter-from, .slide-leave-to { opacity: 0; transform: translateX(20px); }

/* ─── WRITING PROMPT HTML ─── */
.writing-prompt-html p { margin-bottom: 0.75rem; font-size: 13px; line-height: 1.65; }
.writing-prompt-html em { font-style: italic; }
.writing-prompt-html strong { font-weight: 600; }

/* ─── READING PASSAGE (vocab / review) ─── */
.vocab-mode .vocab-word { cursor: pointer; }
.vocab-mode .vocab-underline {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--spotify-green);
  color: var(--spotify-green);
}
.answer-mark {
  border-radius: 3px;
  background: #fef08a;
  padding: 1px 2px;
  font-weight: 600;
}

/* ─── SKILL SEARCH (Speaking / Reading list) ─── */
.skill-search-wrap {
  position: relative;
  align-self: flex-start;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}
@media (min-width: 640px) {
  .skill-search-wrap { min-width: 240px; width: auto; }
}
.skill-search-icon {
  position: absolute;
  top: 50%;
  left: 0.75rem;
  transform: translateY(-50%);
  color: var(--ink3);
  pointer-events: none;
}
.skill-search-input {
  width: 100%;
  border: none;
  border-radius: var(--radius-pill);
  background: var(--bg-interactive);
  padding: 0.5rem 0.75rem 0.5rem 2.1rem;
  font-size: var(--text-button);
  color: var(--text-base);
  outline: none;
  box-shadow: var(--shadow-inset-border);
  transition: box-shadow var(--transition-base), outline var(--transition-base);
}
.skill-search-input:focus {
  outline: 1px solid var(--text-base);
}

.page-wrapper--constrained {
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
}

/* ─── AUTH (theme-aware, Spotify tokens) ─── */
.auth-page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg-base);
  color: var(--text-base);
}
.auth-page--centered {
  grid-template-columns: 1fr;
  place-items: center;
  padding: 24px;
}
.auth-page--centered .auth-card {
  max-width: 480px;
  width: 100%;
  border-right: none;
  border: 1px solid var(--border-button);
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow-medium);
}
.auth-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 48px clamp(24px, 5vw, 64px);
  background: var(--bg-surface);
  border-right: 1px solid var(--border-button);
}
.auth-card > * {
  width: 100%;
  max-width: 420px;
}
.auth-logo { margin-bottom: 32px; }
.logo-mark {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-base);
  letter-spacing: -0.02em;
}
.logo-mark span { color: var(--spotify-green); }
.logo-sub {
  font-size: 11px;
  color: var(--text-subdued);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 4px;
}
.auth-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-base);
  margin-bottom: 6px;
}
.auth-sub {
  font-size: 14px;
  color: var(--text-subdued);
  margin-bottom: 28px;
  line-height: 1.5;
}
.auth-page .form-group { margin-bottom: 16px; }
.auth-page .form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-subdued);
  margin-bottom: 6px;
}
.auth-page .form-input,
.auth-page select.form-input {
  width: 100%;
  padding: 12px 18px;
  border: none;
  border-radius: var(--radius-comfortable);
  font-size: 14px;
  font-family: inherit;
  color: var(--text-base);
  background: var(--bg-interactive);
  box-shadow: var(--shadow-inset-border);
  outline: none;
  transition: box-shadow var(--transition-base), outline var(--transition-base);
}
.auth-page .form-input::placeholder {
  color: var(--text-subdued);
}
.auth-page .form-input:focus,
.auth-page select.form-input:focus {
  outline: 1px solid var(--spotify-green);
  box-shadow: var(--shadow-inset-border);
}
.auth-page .error-msg {
  font-size: 13px;
  color: var(--text-negative);
  background: var(--rose-bg);
  padding: 10px 14px;
  border-radius: var(--radius-comfortable);
  border: 1px solid color-mix(in srgb, var(--text-negative) 25%, transparent);
  margin-bottom: 12px;
}
.auth-success-msg,
.auth-page .success-msg {
  margin-bottom: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-comfortable);
  border: 1px solid color-mix(in srgb, var(--spotify-green) 35%, transparent);
  background: var(--green-bg);
  text-align: center;
  font-size: 13px;
  color: var(--spotify-green-dark);
}
[data-theme="dark"] .auth-success-msg,
[data-theme="dark"] .auth-page .success-msg {
  color: var(--spotify-green);
}
.auth-page .btn-primary {
  width: 100%;
  padding: 12px 24px;
  border-radius: var(--radius-full-pill);
  background: var(--spotify-green);
  color: #000000;
  font-size: var(--text-button);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-button);
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: background var(--transition-base), transform var(--transition-base);
  margin-top: 4px;
}
.auth-page .btn-primary:hover:not(:disabled) {
  background: var(--spotify-green-dark);
  transform: scale(1.02);
}
.auth-page .btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}
.auth-google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 11px 18px;
  border: none;
  border-radius: var(--radius-full-pill);
  background: var(--bg-interactive);
  color: var(--text-base);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-inset-border);
  transition: box-shadow var(--transition-base), outline var(--transition-base);
  margin-bottom: 4px;
}
.auth-google-btn:hover:not(:disabled) {
  outline: 1px solid var(--border-outlined);
}
.auth-google-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0 8px;
  color: var(--text-subdued);
  font-size: 12px;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-button);
}
.auth-footer {
  margin-top: 24px;
  font-size: 13px;
  color: var(--text-subdued);
  text-align: center;
}
.auth-footer--stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.auth-link {
  color: var(--spotify-green);
  font-weight: 600;
  text-decoration: none;
  margin-left: 4px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  padding: 0;
}
.auth-link:hover:not(:disabled) {
  text-decoration: underline;
}
.auth-link:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.auth-deco {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px clamp(24px, 5vw, 60px);
  position: relative;
  overflow: hidden;
  background: linear-gradient(
    155deg,
    color-mix(in srgb, var(--spotify-green) 14%, var(--bg-interactive)) 0%,
    var(--bg-base) 55%,
    var(--bg-surface) 100%
  );
}
[data-theme="light"] .auth-deco {
  background: linear-gradient(
    155deg,
    color-mix(in srgb, var(--spotify-green) 18%, var(--bg-interactive)) 0%,
    var(--bg-base) 50%,
    color-mix(in srgb, var(--spotify-green) 6%, var(--bg-surface)) 100%
  );
}
.auth-deco::before {
  content: '';
  position: absolute;
  bottom: -80px;
  right: -60px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, color-mix(in srgb, var(--spotify-green) 22%, transparent) 0%, transparent 70%);
  pointer-events: none;
}
.auth-deco::after {
  content: '';
  position: absolute;
  top: -80px;
  left: -60px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, color-mix(in srgb, var(--text-announcement) 14%, transparent) 0%, transparent 70%);
  pointer-events: none;
}
.deco-content { position: relative; z-index: 1; max-width: 400px; }
.deco-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full-pill);
  background: var(--green-bg);
  color: var(--spotify-green);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 20px;
  border: 1px solid color-mix(in srgb, var(--spotify-green) 30%, transparent);
}
.deco-title {
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  color: var(--text-base);
  line-height: 1.2;
  margin-bottom: 28px;
}
.deco-features { display: flex; flex-direction: column; gap: 12px; }
.deco-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-subdued);
}
.feature-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--spotify-green);
  color: #000000;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.auth-register .auth-card { padding: 40px clamp(24px, 5vw, 56px); }
.auth-register .auth-logo { margin-bottom: 24px; }
.auth-register .auth-title { font-size: 26px; }
.auth-register .auth-sub { font-size: 13px; margin-bottom: 24px; }
.auth-register .form-group { margin-bottom: 14px; }
.auth-register .form-label { margin-bottom: 5px; }
.auth-register .form-input { padding: 11px 16px; font-size: 13px; }
.auth-register .btn-primary { font-size: 14px; }
.auth-register .auth-footer { margin-top: 20px; }
.target-row { display: flex; gap: 12px; }
.milestone-list { display: flex; flex-direction: column; gap: 14px; }
.milestone { display: flex; align-items: center; gap: 12px; }
.milestone-band {
  font-size: 16px;
  font-weight: 700;
  color: var(--spotify-green);
  width: 36px;
  flex-shrink: 0;
}
.milestone-bar {
  flex: 1;
  height: 6px;
  background: color-mix(in srgb, var(--text-base) 12%, transparent);
  border-radius: 99px;
  overflow: hidden;
}
.milestone-fill {
  height: 100%;
  background: linear-gradient(to right, var(--spotify-green), var(--text-announcement));
  border-radius: 99px;
}
.milestone-label {
  font-size: 12px;
  color: var(--text-subdued);
  width: 80px;
}
.auth-verify-icon {
  display: flex;
  height: 64px;
  width: 64px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--green-bg);
  border: 1px solid color-mix(in srgb, var(--spotify-green) 40%, transparent);
  margin: 0 auto 20px;
}
@media (max-width: 768px) {
  .auth-page { grid-template-columns: 1fr; }
  .auth-deco { display: none; }
  .auth-card {
    padding: 40px 24px;
    border-right: none;
    min-height: 100vh;
  }
  .target-row { flex-direction: column; gap: 0; }
}

/* ─── HISTORY ─── */
.history-filter-btn {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 12px; border-radius: 20px;
  border: 1.5px solid var(--border2);
  background: var(--surface); color: var(--ink2);
  font-size: 12px; font-weight: 500; cursor: pointer;
  transition: all .15s;
}
.history-filter-btn:hover { border-color: var(--spotify-green); color: var(--spotify-green); }
.history-filter-btn.active { border-color: var(--spotify-green); background: var(--green-bg); color: var(--spotify-green); font-weight: 700; }
.filter-icon { display: flex; align-items: center; }
.history-action-btn {
  display: inline-flex; align-items: center; gap: 5px;
  margin-left: 0; white-space: nowrap;
  border-radius: var(--r-sm);
  border: 1px solid var(--border2);
  background: transparent; padding: 6px 12px;
  font-size: 12px; font-weight: 600; color: var(--ink2);
  cursor: pointer; transition: all .15s;
  text-decoration: none;
}
.history-action-btn:hover { background: var(--bg2); }
.history-action-btn--primary {
  border-color: var(--spotify-green);
  background: var(--bg-surface);
  color: var(--spotify-green);
}
.history-action-btn--primary:hover { background: var(--bg-interactive); }
[data-theme="dark"] .history-action-btn--primary {
  border-color: var(--border2);
  background: var(--bg);
  color: var(--spotify-green);
}
@media (min-width: 640px) {
  .history-action-btn { margin-left: 8px; }
}
.lb-page { max-width: 700px; margin-left: auto; margin-right: auto; width: 100%; }
.podium { display: flex; align-items: flex-end; justify-content: center; gap: 12px; padding: 0 16px; }
.podium-item { display: flex; flex-direction: column; align-items: center; gap: 6px; flex: 1; max-width: 160px; }
.podium-crown { margin-bottom: -4px; }
.podium-avatar-wrap { position: relative; }
.podium-avatar { width: 56px; height: 56px; border-radius: 50%; object-fit: cover; border: 2px solid var(--border); }
.podium-avatar--large { width: 68px; height: 68px; }
.podium-rank {
  position: absolute; bottom: -4px; right: -4px;
  width: 20px; height: 20px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: 700; color: white; border: 1.5px solid white;
}
.rank-1 { background: #f59e0b; }
.rank-2 { background: #9ca3af; }
.rank-3 { background: #b45309; }
.podium-name { font-size: 12px; font-weight: 500; color: var(--ink); text-align: center; max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.podium-xp { font-size: 11px; font-weight: 600; color: var(--ink3); }
.xp-gold { color: #d97706; }
.podium-bar { width: 100%; border-radius: 8px 8px 0 0; }
.bar-1 { height: 64px; background: linear-gradient(180deg, #fde68a, #f59e0b); }
.bar-2 { height: 48px; background: linear-gradient(180deg, #e5e7eb, #9ca3af); }
.bar-3 { height: 36px; background: linear-gradient(180deg, #fde8c8, #b45309); }
.lb-row { display: flex; align-items: center; gap: 12px; border-bottom: 1px solid var(--border); padding: 12px 20px; transition: background 0.15s; }
.lb-row:last-child { border-bottom: none; }
.lb-row:hover { background: var(--bg); }
.lb-row--me { background: var(--green-bg); }
.lb-rank { width: 32px; text-align: right; }
.lb-rank-num { font-size: 14px; font-weight: 700; color: var(--ink3); }
.lb-avatar { width: 36px; height: 36px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.lb-info { flex: 1; min-width: 0; }
.lb-name { font-size: 13px; font-weight: 600; color: var(--ink); display: flex; align-items: center; gap: 6px; }
.lb-streak { font-size: 11px; color: var(--ink3); display: flex; align-items: center; gap: 3px; margin-top: 2px; }
.lb-you-badge { font-size: 10px; font-weight: 700; background: #d1fae5; color: #065f46; padding: 1px 6px; border-radius: 20px; }
.lb-xp-col { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; min-width: 100px; }
.lb-xp-bar-wrap { width: 80px; height: 4px; background: var(--bg2); border-radius: 2px; overflow: hidden; }
.lb-xp-bar { height: 100%; background: #34d399; border-radius: 2px; transition: width 0.8s ease; }
.lb-xp-num { font-size: 12px; font-weight: 700; color: var(--ink2); }

/* ─── PROFILE ─── */
.profile-page { max-width: 900px; margin-left: auto; margin-right: auto; width: 100%; }
.profile-stack { display: flex; flex-direction: column; gap: 14px; }
.profile-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 20px; }
@media (max-width: 767px) {
  .profile-grid { grid-template-columns: 1fr; }
  .profile-page .form-row { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
  .profile-card { padding: 20px; }
}
.profile-page .card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow-sm);
}
.profile-card { padding: 28px; }
.avatar-section { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
.avatar-wrapper { position: relative; width: 72px; height: 72px; border-radius: 50%; flex-shrink: 0; }
.avatar-img { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; display: block; }
.avatar-upload-overlay {
  position: absolute; inset: 0; border-radius: 50%;
  background: rgba(0, 0, 0, 0.45);
  display: flex; align-items: center; justify-content: center;
  color: white; opacity: 0; cursor: pointer; transition: opacity 0.18s;
}
.avatar-wrapper:hover .avatar-upload-overlay { opacity: 1; }
.upload-status { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ink3); margin-bottom: 8px; }
.user-name { font-size: 18px; font-weight: 600; color: var(--ink); }
.user-email { font-size: 13px; color: var(--ink3); margin-top: 2px; }
.user-level-badge { margin-top: 6px; font-size: 11px; font-weight: 600; color: var(--green); display: flex; align-items: center; gap: 4px; }
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding-top: 20px; border-top: 1px solid var(--border); margin-top: 16px; }
.stat-box { text-align: center; }
.stat-val { font-size: 24px; font-weight: 700; color: var(--ink); }
.stat-label { font-size: 11px; color: var(--ink3); margin-top: 2px; }
.profile-page .section-title { font-size: 16px; font-weight: 600; color: var(--ink); }
.profile-page .form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.profile-page .form-label { font-size: 12px; font-weight: 600; color: var(--ink2); }
.profile-page .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.profile-page .form-input {
  padding: 9px 12px; border: 1.5px solid var(--border2); border-radius: var(--r-sm);
  font-size: 13px; font-family: inherit; color: var(--ink); background: var(--bg);
  outline: none; transition: border-color 0.18s;
}
.profile-page .form-input:focus { border-color: var(--green-l); }
.profile-page .form-input:disabled { opacity: 0.5; cursor: not-allowed; }
.profile-page .form-actions { display: flex; justify-content: space-between; margin-top: 20px; }
.profile-page .btn-primary {
  padding: 9px 20px; border-radius: var(--r-sm); background: var(--green); color: white;
  font-size: 13px; font-weight: 600; border: none; cursor: pointer; font-family: inherit; transition: all 0.18s;
}
.profile-page .btn-primary:hover { background: var(--spotify-green-dark); }
.profile-page .btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }
.profile-page .btn-danger {
  padding: 9px 20px; border-radius: var(--r-sm); background: transparent; color: var(--rose);
  font-size: 13px; font-weight: 600; border: 1px solid var(--rose-l); cursor: pointer; font-family: inherit; transition: all 0.18s;
}
.profile-page .btn-danger:hover { background: var(--rose-bg); }
.profile-page .error-msg { margin-top: 10px; font-size: 13px; color: var(--rose); }
.profile-page .success-msg { margin-top: 10px; font-size: 13px; color: var(--green); }
.avatar-info { flex: 1; min-width: 0; }

.profile-page .badges-section { padding: 24px; }
.profile-password-card { padding: 24px; }
.profile-ai-hint {
  margin: 0 0 16px;
  font-size: 12px;
  line-height: 1.55;
  color: var(--ink3);
}
.profile-ai-note {
  margin: -8px 0 12px;
  font-size: 11px;
  color: var(--ink3);
}
.profile-page .badges-header {
  display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between;
  gap: 16px; margin-bottom: 16px;
}
.profile-page .badges-subtitle { margin: 4px 0 0; font-size: 12px; color: var(--ink3); max-width: 420px; }
.profile-page .badges-progress-wrap { min-width: 160px; flex: 0 0 auto; }
.profile-page .badges-progress-label {
  display: flex; justify-content: space-between; gap: 8px;
  font-size: 12px; font-weight: 600; margin-bottom: 6px;
}
.profile-page .badges-progress-bar {
  height: 8px; border-radius: 999px; background: var(--border); overflow: hidden;
}
.profile-page .badges-progress-fill {
  height: 100%; border-radius: inherit;
  background: linear-gradient(90deg, var(--spotify-green), var(--spotify-green-dark));
  transition: width 0.4s ease;
}
.profile-page .badges-filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.profile-page .badges-filter-btn {
  padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--bg-surface); font-size: 12px; font-weight: 600; color: var(--ink2);
  cursor: pointer; font-family: inherit; transition: var(--transition-base);
}
.profile-page .badges-filter-btn:hover { border-color: var(--spotify-green); color: var(--ink); }
.profile-page .badges-filter-btn.active {
  background: var(--green-bg); border-color: var(--spotify-green); color: var(--spotify-green);
}
.profile-page .badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}
.profile-page .badge-card {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px; border-radius: 14px; border: 1px solid var(--border);
  background: var(--bg-surface); position: relative; transition: transform var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer; font-family: inherit; text-align: left; width: 100%;
}
.badge-hint-overlay {
  position: fixed; inset: 0; z-index: 9000;
  display: flex; align-items: center; justify-content: center;
  padding: 20px; background: rgba(15, 23, 42, 0.45);
}
.badge-hint-popover {
  width: min(100%, 380px); padding: 24px; background: #fff;
  border-radius: 16px; box-shadow: 0 20px 50px rgba(15, 23, 42, 0.18); text-align: center;
}
.badge-hint-icon { margin-bottom: 12px; display: flex; justify-content: center; }
.badge-hint-title { margin: 0 0 6px; font-size: 18px; color: var(--ink); }
.badge-hint-desc { margin: 0 0 14px; font-size: 13px; color: var(--ink3); }
.badge-hint-box {
  text-align: left; padding: 12px 14px; border-radius: 10px;
  background: var(--bg); border: 1px solid var(--border); font-size: 12px; line-height: 1.5; color: var(--ink2);
}
.badge-hint-label {
  display: block; font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--ink3); margin-bottom: 6px;
}
.badge-hint-status { margin: 12px 0 0; font-size: 12px; font-weight: 600; color: var(--ink3); }
.badge-hint-status--done { color: #059669; }
.profile-page .badge-card--unlocked {
  border-color: var(--spotify-green); background: linear-gradient(145deg, var(--green-bg) 0%, var(--bg-surface) 55%);
  box-shadow: var(--shadow-sm);
}
.profile-page .badge-card--unlocked:hover { transform: translateY(-2px); }
.profile-page .badge-card--locked { opacity: 0.72; filter: grayscale(0.35); }
.profile-page .badge-card-icon { font-size: 28px; line-height: 1; flex-shrink: 0; }
.profile-page .badge-card-body { flex: 1; min-width: 0; }
.profile-page .badge-card-title { font-size: 13px; font-weight: 700; color: var(--ink); margin-bottom: 4px; }
.profile-page .badge-card-desc { font-size: 11px; line-height: 1.45; color: var(--ink3); }
.profile-page .badge-card-check {
  position: absolute; top: 10px; right: 10px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--spotify-green); color: #000; font-size: 11px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.profile-page .badge-card-lock {
  position: absolute; top: 10px; right: 10px; font-size: 12px; opacity: 0.5;
}

/* ─── QUIZ (legacy Quiz.vue) ─── */
.quiz-header { margin-bottom: 1.5rem; }
.quiz-back-link { font-size: 0.9rem; color: var(--color-text-muted); text-decoration: none; display: inline-block; margin-bottom: 1rem; }
.quiz-back-link:hover { color: var(--color-primary); }
.quiz-subject { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.5rem; }
.quiz-subject h1 { margin: 0; }
.quiz-progress-top { margin-bottom: 1.5rem; }
.quiz-progress-text { font-size: 0.82rem; display: block; margin-top: 6px; text-align: right; }
.quiz-question-card { padding: 2rem; }
.quiz-question-num { font-size: 0.8rem; font-weight: 600; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 1rem; }
.quiz-question-text { font-size: 1.2rem; font-weight: 700; line-height: 1.5; margin-bottom: 1.75rem; }
.quiz-options-list { display: flex; flex-direction: column; gap: 0.75rem; }
.quiz-option-btn {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 1.25rem; width: 100%;
  background: var(--color-surface-2); border: 2px solid var(--color-border);
  border-radius: var(--radius-md); cursor: pointer;
  text-align: left; color: var(--color-text);
  font-family: inherit; font-size: 0.95rem;
  transition: all var(--transition-fast);
}
.quiz-option-btn:hover { border-color: var(--color-primary); background: rgba(124,106,247,0.08); }
.quiz-option-btn.selected { border-color: var(--color-primary); background: rgba(124,106,247,0.15); }
.quiz-option-letter {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--color-surface); border: 2px solid var(--color-border);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem; flex-shrink: 0;
  transition: all var(--transition-fast);
}
.quiz-option-btn.selected .quiz-option-letter { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.quiz-nav { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 1.5rem; }
.quiz-dot-indicators { display: flex; gap: 6px; }
.quiz-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--color-surface-2); border: 2px solid var(--color-border);
  cursor: pointer; transition: all 0.2s; padding: 0;
}
.quiz-dot.answered { background: rgba(124,106,247,0.4); border-color: var(--color-primary); }
.quiz-dot.active { background: var(--color-primary); border-color: var(--color-primary); transform: scale(1.3); }

/* ─── QUIZ RUNNER reading panel ─── */
.quiz-runner .reading-passage { max-height: 420px; overflow: auto; padding-right: 8px; }
.quiz-runner .reading-paragraph {
  display: flex; gap: 10px; padding: 10px 12px; border-radius: 12px;
  border: 1px solid transparent; margin-bottom: 10px; background: var(--surface);
}
.quiz-runner .reading-paragraph.is-highlight { border-color: rgba(124, 106, 247, 0.35); background: rgba(124, 106, 247, 0.08); }
.quiz-runner .para-tag {
  min-width: 28px; height: 22px; border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700; color: var(--ink2);
  border: 1px solid var(--border2); background: var(--bg);
}

/* Passage title (parts[].content) — h2/h3 heading above the reading text */
.passage-title { margin-bottom: 12px; }
.passage-title h1, .passage-title h2, .passage-title h3,
.passage-title h4, .passage-title h5, .passage-title h6 {
  font-weight: 700; line-height: 1.4; color: var(--ink);
}

/* GAP_FILLING table styling for quiz content (border from JSON data) */
.gap-html table, .prose table {
  width: 100%; border-collapse: collapse; margin-bottom: 8px;
}
.gap-html td, .gap-html th, .prose td, .prose th {
  padding: 6px 10px; border: 1px solid var(--border2);
  vertical-align: top; font-size: 13px;
}
.gap-html h4, .prose h4 { text-align: center; font-weight: 700; margin: 4px 0; }

/* --- VOCAB PAGE (Vocabulary.vue) --- */
/* ── Layout ────────────────────────────────────────────────────────────── */
.vocab-page {
  min-height: 0;
  background: transparent;
  padding: 0;
}
.vocab-page--sections .vocab-header {
  display: none;
}

/* ── Header ──────────────────────────────────────────────────────────── */
.vocab-header {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  margin-bottom: 24px;
  padding: 20px 24px;
  background: #fff; border-radius: 16px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(0,0,0,.04);
}
.vocab-header__title { font-size: 20px; font-weight: 800; color: #0f172a; }
.vocab-header__sub   { font-size: 13px; color: #64748b; margin-top: 2px; }
.vocab-header__stats { display: flex; gap: 10px; flex-wrap: wrap; }

.stat-pill {
  display: flex; flex-direction: column; align-items: center;
  padding: 8px 16px; border-radius: 10px;
  border: 1.5px solid #e2e8f0; background: #f8fafc;
  min-width: 64px;
}
.stat-pill--green { border-color: #15803d; background: #f0fdf4; }
.stat-pill--amber { border-color: #d97706; background: #fffbeb; }
.stat-num { font-size: 18px; font-weight: 800; color: #0f172a; }
.stat-lbl { font-size: 10px; color: #64748b; text-transform: uppercase; letter-spacing: .06em; margin-top: 1px; }
.stat-pill--green .stat-num { color: #15803d; }
.stat-pill--amber .stat-num { color: #d97706; }

/* ── Main layout ──────────────────────────────────────────────────────── */
.vocab-layout { display: flex; gap: 20px; align-items: flex-start; }
@media (max-width: 767px) {
  .vocab-layout {
    flex-direction: column;
    gap: 16px;
  }
  .vocab-sidebar {
    width: 100% !important;
    flex: none !important;
  }
  .vocab-main {
    width: 100%;
    min-width: 0;
  }
  .field-grid { grid-template-columns: 1fr !important; }
}
.vocab-layout--study {
  flex-direction: row;
  align-items: stretch;
  gap: 0;
}
.vocab-layout--study .vocab-sidebar {
  min-width: 180px;
  max-width: 50%;
}
.vocab-layout--study .vocab-main {
  min-width: 260px;
}
.vocab-layout--resizing {
  cursor: col-resize;
  user-select: none;
}
.split-handle {
  flex-shrink: 0;
  width: 10px;
  margin: 0 4px;
  cursor: col-resize;
  border-radius: 6px;
  background: transparent;
  transition: background 0.15s;
  position: relative;
}
.split-handle::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 3px;
  height: 48px;
  border-radius: 3px;
  background: #e2e8f0;
  transition: background 0.15s, height 0.15s;
}
.split-handle:hover::after,
.vocab-layout--resizing .split-handle::after {
  background: #15803d;
  height: 64px;
}
.vocab-layout--study .topic-list {
  max-height: min(520px, calc(100vh - 300px));
  overflow-y: auto;
}
@media (max-width: 768px) {
  .vocab-layout--study {
    flex-direction: column;
    gap: 16px;
  }
  .vocab-layout--study .split-handle {
    display: none;
  }
  .vocab-layout--study .vocab-sidebar,
  .vocab-layout--study .vocab-main {
    flex: none !important;
    width: 100% !important;
    max-width: none !important;
  }
}

/* ── Sidebar ──────────────────────────────────────────────────────────── */
.vocab-sidebar {
  width: 240px; flex-shrink: 0;
  background: #fff; border-radius: 16px;
  border: 1px solid #e2e8f0;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,.04);
}
.sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; border-bottom: 1px solid #f1f5f9;
}
.sidebar-title { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: #64748b; }
.sidebar-add-btn {
  width: 28px; height: 28px; border-radius: 8px;
  border: 1.5px solid #15803d; background: #f0fdf4; color: #15803d;
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  transition: all .15s;
}
.sidebar-add-btn:hover { background: #15803d; color: #fff; }
.sidebar-loading, .sidebar-empty { padding: 16px; font-size: 13px; color: #94a3b8; text-align: center; line-height: 1.6; }
.sidebar-error { color: #e11d48; display: flex; flex-direction: column; align-items: center; }
.link-btn { background: none; border: none; color: #15803d; cursor: pointer; font-weight: 600; }

.topic-list { padding: 8px; display: flex; flex-direction: column; gap: 2px; }
.topic-item {
  display: flex; align-items: center; gap: 4px;
  padding: 10px 10px; border-radius: 10px; cursor: pointer;
  transition: all .15s; border: 1.5px solid transparent;
}
.topic-item:hover { background: #f8fafc; }
.topic-item.active { background: #f0fdf4; border-color: #15803d; }
.topic-item__body { flex: 1; min-width: 0; }
.topic-item__name { font-size: 13px; font-weight: 600; color: #0f172a; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }
.topic-item.active .topic-item__name { color: #15803d; }
.topic-item__count { font-size: 10px; color: #94a3b8; margin-top: 1px; display: block; }
.topic-item__menu { flex-shrink: 0; }
.menu-btn {
  width: 24px; height: 24px; border-radius: 6px;
  background: none; border: none; color: #94a3b8; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity .15s;
}
.topic-item:hover .menu-btn { opacity: 1; }
.menu-btn:hover { background: #f1f5f9; color: #475569; }

/* ── Main panel ─────────────────────────────────────────────────────── */
.vocab-main {
  flex: 1; min-width: 0;
  background: #fff; border-radius: 16px;
  border: 1px solid #e2e8f0;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,.04);
}
.vocab-main--study {
  min-height: 420px;
}
.main-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid #f1f5f9; gap: 12px;
}
.main-title { font-size: 15px; font-weight: 800; color: #0f172a; }
.main-sub   { font-size: 12px; color: #94a3b8; margin-top: 2px; }

.main-header-actions {
  display: flex; align-items: center; gap: 12px; flex-shrink: 0; flex-wrap: wrap;
}

.word-search-wrap {
  position: relative; display: flex; align-items: center;
}
.word-search-icon {
  position: absolute; left: 8px; color: #94a3b8; pointer-events: none;
}
.word-search-input {
  padding: 7px 28px 7px 26px;
  border: 1.5px solid #e2e8f0;
  border-radius: 10px; font-size: 12px;
  color: #0f172a; background: #f8fafc;
  outline: none; width: 160px;
  transition: border-color .15s, width .2s;
}
.word-search-input:focus {
  border-color: #15803d; width: 200px;
}
.word-search-clear {
  position: absolute; right: 6px;
  background: none; border: none; cursor: pointer;
  color: #94a3b8; display: flex; align-items: center;
  padding: 2px;
}
.word-search-clear:hover { color: #0f172a; }

.view-tabs {
  display: inline-flex;
  gap: 4px;
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 3px;
  background: var(--bg-interactive);
}
.view-tab {
  padding: 6px 14px; font-size: 12px; font-weight: 600; border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--ink3); cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.view-tab.active { background: var(--spotify-green); color: #000; }

.add-word-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 16px; background: #15803d; color: #fff;
  border: none; border-radius: 10px; font-size: 13px; font-weight: 600; cursor: pointer;
  transition: background .15s;
}
.add-word-btn:hover { background: #166534; }

/* ── Word table ──────────────────────────────────────────────────────── */
.word-table { padding: 0; }
.word-table-head {
  display: flex; gap: 0; padding: 0 20px;
  border-bottom: 1px solid #f1f5f9; background: #f8fafc;
}
.th {
  padding: 10px 8px;
  font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .06em; color: #94a3b8;
}
.word-row {
  display: flex; align-items: center; gap: 0; padding: 0 20px;
  border-bottom: 1px solid #f8fafc; transition: background .1s;
}
.word-row:hover { background: #f8fafc; }
.td { padding: 12px 8px; font-size: 13px; color: #374151; }

.word-cell { display: flex; align-items: center; gap: 6px; }
.word-text { font-weight: 700; color: #0f172a; }
.tts-btn {
  padding: 3px; background: none; border: none; cursor: pointer;
  color: #94a3b8; border-radius: 4px; transition: all .1s;
}
.tts-btn:hover { color: #15803d; background: #f0fdf4; }
.word-phonetic { font-size: 11px; color: #94a3b8; font-style: italic; margin-top: 1px; }
.word-type-pill {
  display: inline-block;
  margin-top: 3px; padding: 1px 8px;
  background: #dcfce7; color: #15803d;
  border-radius: 6px; font-size: 10px; font-weight: 600; text-transform: uppercase;
}
.meaning-vi { color: #15803d; font-weight: 600; }
.example-text { color: #64748b; font-size: 12px; font-style: italic; }

.srs-cell { display: flex; flex-direction: column; gap: 2px; font-size: 11px; }
.srs-due { color: #b45309; font-weight: 700; }
.srs-ok { color: #64748b; }
.srs-meta { color: #94a3b8; font-size: 10px; }

.mastery-select {
  border: 1.5px solid #e2e8f0; border-radius: 8px;
  padding: 4px 8px; font-size: 11px; font-weight: 600;
  background: #f8fafc; cursor: pointer; outline: none;
  max-width: 100%;
}
.mastery--new      { border-color: #e2e8f0; color: #94a3b8; }
.mastery--learning { border-color: #fbbf24; color: #d97706; background: #fffbeb; }
.mastery--mastered { border-color: #15803d; color: #15803d; background: #f0fdf4; }

.row-actions { display: flex; gap: 4px; }
.row-action-btn {
  width: 28px; height: 28px; border-radius: 6px;
  background: none; border: 1px solid #e2e8f0; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: #94a3b8; transition: all .15s;
}
.row-action-btn:hover { border-color: #15803d; color: #15803d; background: #f0fdf4; }
.row-action-btn--del:hover { border-color: #e11d48; color: #e11d48; background: #fff1f2; }

/* ── Empty state ─────────────────────────────────────────────────────── */
.empty-state {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; padding: 60px 20px; text-align: center;
}
.empty-icon { color: #cbd5e1; }
.empty-title { font-size: 14px; font-weight: 600; color: #94a3b8; }

/* ── Modals ───────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 10000;
  background: rgba(0,0,0,.4);
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.modal-sm {
  background: #fff; border-radius: 20px; width: 100%; max-width: 360px;
  box-shadow: 0 24px 80px rgba(0,0,0,.18); overflow: hidden;
}
.modal-lg {
  background: #fff; border-radius: 20px; width: 100%; max-width: 560px;
  box-shadow: 0 24px 80px rgba(0,0,0,.18); overflow: hidden;
}
.modal-sm-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid #f1f5f9;
  font-size: 14px; font-weight: 700; color: #0f172a;
}
.modal-sm-header button { background: none; border: none; cursor: pointer; color: #94a3b8; padding: 4px; border-radius: 6px; }
.modal-sm-header button:hover { background: #f1f5f9; }
.modal-sm-body { padding: 16px 18px; }
.topic-input {
  width: 100%; border: 1.5px solid #e2e8f0; border-radius: 10px;
  padding: 10px 14px; font-size: 14px; outline: none; font-family: inherit;
}
.topic-input:focus { border-color: #15803d; }

.modal-lg-body { padding: 16px 18px; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.col-span-2 { grid-column: span 2; }
.field label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: #94a3b8; }
.field input, .field textarea {
  border: 1.5px solid #e2e8f0; border-radius: 10px;
  padding: 8px 12px; font-size: 13px; outline: none; font-family: inherit; resize: vertical;
}
.field input:focus, .field textarea:focus { border-color: #15803d; }

.modal-sm-footer {
  display: flex; justify-content: flex-end; gap: 8px;
  padding: 12px 18px; border-top: 1px solid #f1f5f9;
}
.btn-cancel { padding: 8px 16px; border: 1px solid #e2e8f0; border-radius: 8px; background: #f8fafc; color: #475569; font-size: 13px; cursor: pointer; }
.btn-green  { padding: 8px 20px; background: #15803d; color: #fff; border: none; border-radius: 8px; font-size: 13px; font-weight: 700; cursor: pointer; }
.btn-green:disabled { opacity: .4; cursor: not-allowed; }

/* ── Topic context menu ────────────────────────────────────────────── */
.topic-ctx-menu {
  position: fixed; z-index: 10100;
  background: #fff; border: 1px solid #e2e8f0; border-radius: 10px;
  padding: 4px; box-shadow: 0 8px 24px rgba(0,0,0,.15);
  min-width: 140px;
}
.topic-ctx-menu button {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 8px 14px; text-align: left;
  background: none; border: none; border-radius: 6px;
  font-size: 13px; color: #374151; cursor: pointer;
}
.topic-ctx-menu button:hover { background: #f1f5f9; }
.topic-ctx-menu button.danger { color: #e11d48; }
.topic-ctx-menu button.danger:hover { background: #fff1f2; }

/* ── Source badge (Reading / Listening provenance) ─────────────────── */
.source-badge {
  font-size: 9px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .05em; padding: 2px 6px; border-radius: 4px;
  line-height: 1.4;
}
.source-badge--reading   { background: #e0f2fe; color: #0369a1; }
.source-badge--listening { background: #fef3c7; color: #92400e; }

/* ── Transitions ────────────────────────────────────────────────────── */
.modal-fade-enter-active, .modal-fade-leave-active { transition: opacity .2s; }
.modal-fade-enter-from, .modal-fade-leave-to { opacity: 0; }

.popup-fade-enter-active, .popup-fade-leave-active { transition: opacity .15s, transform .15s; }
.popup-fade-enter-from, .popup-fade-leave-to { opacity: 0; transform: scale(.95); }

/* --- REVIEW ANSWER (ReviewAnswer.vue) --- */
/* ── Score summary ─────────────────────────────────────────────────── */
.score-summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 4px;
  flex-wrap: wrap;
}
.score-ring-wrap {
  position: relative;
  flex-shrink: 0;
  width: 80px; height: 80px;
}
.score-ring-label {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
}
.score-stats {
  display: flex; gap: 12px; flex-shrink: 0;
}
.score-stat {
  display: flex; flex-direction: column; align-items: center;
  gap: 2px; padding: 8px 14px;
  border: 1.5px solid var(--border); border-radius: 10px;
  background: var(--bg-interactive); min-width: 60px;
}
.score-stat--correct { border-color: var(--spotify-green-dark); background: var(--green-bg); }
.score-stat--wrong   { border-color: var(--rose); background: var(--rose-bg); }
.score-stat svg { color: var(--ink3); }
.score-stat--correct svg { color: var(--spotify-green-dark); }
.score-stat--wrong svg   { color: var(--rose); }
.score-stat-num { font-size: 20px; font-weight: 800; color: var(--ink); }
.score-stat-lbl { font-size: 10px; color: var(--ink3); text-transform: uppercase; letter-spacing: .05em; }
.score-stat--correct .score-stat-num { color: var(--spotify-green-dark); }
.score-stat--wrong   .score-stat-num { color: var(--rose); }

.part-bars { flex: 1; display: flex; flex-direction: column; gap: 8px; min-width: 160px; }
.part-bar-item { display: flex; align-items: center; gap: 10px; }
.part-bar-item--clickable {
  cursor: pointer;
  padding: 6px 8px;
  margin: -6px -8px;
  border-radius: 8px;
  transition: background 0.15s;
}
.part-bar-item--clickable:hover { background: var(--bg2); }
.part-bar-item--active {
  background: var(--green-bg);
  outline: 1px solid var(--spotify-green);
}
.part-bar-item--active .part-bar-label { color: var(--spotify-green-dark); }
.part-bar-label { font-size: 11px; font-weight: 600; color: var(--ink3); white-space: nowrap; min-width: 70px; }
.part-bar-track { flex: 1; height: 8px; background: var(--bg-interactive); border-radius: 99px; overflow: hidden; }
.part-bar-fill  { height: 100%; border-radius: 99px; transition: width 1s ease; }
.part-bar-pct   { font-size: 11px; font-weight: 700; color: var(--ink2); min-width: 36px; text-align: right; }

/* ── Header ────────────────────────────────────────────────────────── */
.review-page-header {
  background: color-mix(in srgb, var(--bg-surface) 92%, transparent);
}
.review-back-btn {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--ink3); background: none; border: none; cursor: pointer;
  padding: 6px 10px; border-radius: 8px; transition: all .15s;
}
.review-back-btn:hover { background: var(--bg2); color: var(--ink); }

.review-score-badge {
  display: flex; flex-direction: column; align-items: center;
  border: 1px solid var(--border); border-radius: 12px;
  padding: 6px 16px; background: var(--bg);
}
.review-tools-rail {
  position: sticky;
  top: 120px;
  align-self: flex-start;
}
@media (max-width: 1023px) {
  .review-layout {
    flex-direction: column !important;
  }
  .review-tools-rail {
    position: static;
    align-self: stretch;
    display: flex;
    justify-content: center;
    width: 100%;
  }
  .review-split-left {
    width: 100% !important;
    flex: none !important;
  }
  .review-split-divider {
    display: none !important;
  }
}

/* ── App shell (responsive sidebar) ─────────────────────────────── */
.app-main--with-sidebar {
  margin-left: 0;
}
@media (min-width: 1024px) {
  .app-main--with-sidebar.app-main--collapsed { margin-left: 64px; }
  .app-main--with-sidebar.app-main--expanded { margin-left: 220px; }
}
.app-main__content {
  overflow-x: hidden;
}

/* ── Question cards ──────────────────────────────────────────────── */
.review-question-card {
  border: 1.5px solid var(--border);
  border-radius: 12px; overflow: hidden; background: var(--bg-surface);
  transition: border-color .15s;
}
.review-question-card--correct { border-left: 4px solid var(--spotify-green); }
.review-question-card--wrong   { border-left: 4px solid var(--rose); }

.review-q-header {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-bottom: 1px solid var(--border);
}
.review-q-num { font-size: 11px; font-weight: 700; text-transform: uppercase; color: var(--ink3); letter-spacing: .06em; }
.review-q-badge {
  margin-left: auto;
  border-radius: 99px; padding: 2px 10px;
  font-size: 10px; font-weight: 700; text-transform: uppercase;
}
.badge-correct { background: var(--green-bg); color: var(--spotify-green-dark); }
.badge-wrong   { background: var(--rose-bg); color: var(--rose); }

.review-explain-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 4px 10px; border-radius: 8px; border: 1px solid var(--spotify-green-dark);
  background: var(--green-bg); color: var(--spotify-green-dark); font-size: 11px; font-weight: 600; cursor: pointer;
  transition: all .15s;
}
.review-explain-btn:hover, .review-explain-btn.active { background: var(--spotify-green); color: #000; }

.review-q-text {
  padding: 10px 14px; font-size: 13px; color: var(--ink); line-height: 1.6;
  border-bottom: 1px solid var(--border);
}
.review-q-stem {
  white-space: pre-wrap;
}

.review-answers { padding: 10px 14px; }
.review-answer-row {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 4px 0; font-size: 12px;
}
.review-answer-row--border { border-top: 1px solid var(--border); padding-top: 8px; margin-top: 4px; }
.review-answer-label { color: var(--ink3); }
.review-answer-val { font-weight: 700; font-family: monospace; }
.val-correct { color: var(--spotify-green-dark); }
.val-wrong   { color: var(--rose); }

/* ── Explanation popup ────────────────────────────────────────────── */
.explain-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,.55);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 80px 16px 16px;
}
@media (min-width: 640px) {
  .explain-overlay {
    justify-content: flex-end;
  }
}
.explain-box {
  width: min(100%, 460px); max-height: calc(100vh - 100px);
  background: var(--bg-surface); border: 1px solid var(--border); border-radius: 20px;
  box-shadow: var(--shadow-heavy);
  display: flex; flex-direction: column; overflow: hidden;
}
.explain-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border); flex-shrink: 0;
  background: var(--bg-interactive);
}
.explain-title { font-size: 14px; font-weight: 700; color: var(--ink); }
.explain-goto-btn {
  border: 1px solid var(--spotify-green);
  background: var(--green-bg);
  color: var(--spotify-green-dark);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
}
.explain-close {
  background: none; border: none; cursor: pointer;
  color: var(--ink3); padding: 4px; border-radius: 6px;
}
.explain-close:hover { background: var(--bg2); }
.explain-body {
  flex: 1; overflow-y: auto; padding: 16px 18px;
  font-size: 13px; line-height: 1.7; color: var(--ink);
}
.explain-body u strong { color: var(--spotify-green-dark); }
.explain-body .list-bullet1 { padding-left: 18px; }

/* ── Shadowing studio (Spotify tokens, dark/light) ──────────────── */
.shadowing-studio {
  --sh-accent: var(--spotify-green);
  --sh-accent-dark: var(--spotify-green-dark);
  --sh-ink: var(--ink);
  --sh-surface: var(--bg-surface);
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(30, 215, 96, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 215, 96, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--sh-ink);
}
.sh-tab {
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--ink2);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.sh-tab:hover { border-color: var(--sh-accent); }
.sh-tab.is-active {
  background: var(--sh-accent);
  border-color: var(--sh-accent-dark);
  color: #000;
}
.sh-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--ink);
  transition: background 0.12s, border-color 0.12s;
}
.sh-btn:hover { background: var(--bg-interactive); }
.sh-btn-primary {
  background: var(--sh-accent, var(--spotify-green));
  border-color: var(--sh-accent-dark, var(--spotify-green-dark));
  color: #000000 !important;
  font-weight: 700;
}
.sh-btn-primary:hover { filter: brightness(1.08); }
.sh-btn-primary:disabled {
  opacity: 0.5;
  color: #000000 !important;
}
.sh-btn-block { width: 100%; }
.sh-card {
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  box-shadow: var(--shadow-sm);
}
.sh-panel-title {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink3);
}
.sh-transcript-card.is-active {
  border-color: var(--sh-accent);
  box-shadow: 0 0 0 2px rgba(30, 215, 96, 0.35);
}
.sh-transcript-body {
  word-wrap: break-word;
  overflow-wrap: break-word;
  white-space: normal;
}
.sh-transcript-prose {
  display: block;
  width: 100%;
  text-align: left;
}
.sh-word-chip {
  display: inline-block;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-interactive);
  padding: 6px 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}
.sh-focus-text {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  text-align: center;
  word-break: normal;
  overflow-wrap: break-word;
}
.sh-focus-text .shadowing-vocab-text.vocab-mode {
  justify-content: center;
}
.sh-focus-card {
  min-height: 120px;
}
.sh-tab-panel {
  min-height: 0;
  height: 100%;
  width: 100%;
}
.sh-middle-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
  padding: 16px;
  overflow: hidden;
}
.sh-middle-panel > * {
  flex: 1;
  min-height: 0;
}
.shadowing-transcript {
  max-width: none;
}
/* Shadowing studio: 3 cột tỉ lệ 3 : 2 : 3 */
.sh-studio-grid {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
@media (min-width: 1024px) {
  .sh-studio-grid {
    display: grid;
    grid-template-columns: 3fr 2fr 3fr;
    grid-template-rows: minmax(0, 1fr);
    align-items: stretch;
  }
  .sh-studio-grid > * {
    min-height: 0;
    max-height: 100%;
  }
}
.sh-left-col {
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
  max-height: 100%;
  overflow: hidden;
}
.sh-left-col-scroll {
  box-sizing: border-box;
  height: 100%;
  max-height: 100%;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 12px 14px 16px;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}
.sh-video-meta {
  margin-bottom: 12px;
}
.sh-video-title {
  margin: 8px 0 0;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.5;
  color: #111;
  word-wrap: break-word;
  overflow-wrap: break-word;
  white-space: normal;
}
.sh-video-shell {
  position: relative;
  width: 100%;
  margin-bottom: 14px;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--border-button);
  background: #000;
  aspect-ratio: 16 / 9;
  min-height: 180px;
  z-index: 1;
}
.sh-video-player {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.sh-video-player iframe {
  display: block;
  width: 100% !important;
  height: 100% !important;
}
.sh-left-controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
@media (max-width: 1023px) {
  .sh-left-col {
    max-height: 50vh;
  }
}
.shadowing-studio .sh-middle-panel {
  min-width: 0;
  max-width: 100%;
}

/* ── Transitions ─────────────────────────────────────────────────── */
.popup-fade-enter-active, .popup-fade-leave-active { transition: opacity .2s, transform .2s; }
.popup-fade-enter-from, .popup-fade-leave-to { opacity: 0; transform: translateX(20px); }

/* ── Vocab page theme bridge (legacy hex → tokens) ─────────────── */
.vocab-header,
.vocab-sidebar,
.vocab-main,
.modal-sm,
.modal-lg {
  background: var(--bg-surface) !important;
  border-color: var(--border) !important;
}
.vocab-header__title,
.main-title,
.word-text,
.topic-item__name,
.modal-sm-header,
.stat-num { color: var(--ink) !important; }
.vocab-header__sub,
.main-sub,
.sidebar-title,
.th,
.topic-item__count,
.field label { color: var(--ink3) !important; }
.stat-pill { background: var(--bg-interactive) !important; border-color: var(--border) !important; }
.stat-pill--green { border-color: var(--spotify-green-dark) !important; background: var(--green-bg) !important; }
.stat-pill--green .stat-num,
.topic-item.active .topic-item__name,
.meaning-vi,
.link-btn,
.sidebar-add-btn,
.add-word-btn,
.view-tab.active,
.word-type-pill { color: var(--spotify-green-dark) !important; }
.sidebar-add-btn,
.topic-item.active,
.mastery--mastered,
.row-action-btn:hover,
.tts-btn:hover { background: var(--green-bg) !important; border-color: var(--spotify-green-dark) !important; }
.topic-item:hover,
.word-row:hover,
.word-table-head { background: var(--bg-interactive) !important; }
.word-search-input,
.view-tab,
.mastery-select,
.topic-input,
.field input,
.field textarea {
  background: var(--bg-interactive) !important;
  border-color: var(--border) !important;
  color: var(--ink) !important;
}
.add-word-btn,
.view-tab.active { background: var(--spotify-green) !important; color: #000 !important; }
.add-word-btn:hover { background: var(--spotify-green-dark) !important; }

/* ═══════════════════════════════════════════════════════════
   Theme-aware utility shim (dark mode remaps legacy Tailwind)
═══════════════════════════════════════════════════════════ */
@layer utilities {
  [data-theme="light"] .spotify-panel,
  [data-theme="light"] .ct-card {
    border-color: #121212 !important;
    border-width: 1.5px;
  }
  [data-theme="dark"] .bg-white { background-color: var(--bg-surface) !important; }
  [data-theme="dark"] .ct-card { background-color: var(--bg-surface) !important; }
  [data-theme="dark"] .bg-slate-50,
  [data-theme="dark"] .bg-gray-50 { background-color: var(--bg-interactive) !important; }
  [data-theme="dark"] .bg-slate-100,
  [data-theme="dark"] .bg-gray-100 { background-color: var(--bg-interactive) !important; }
  [data-theme="dark"] .text-slate-900,
  [data-theme="dark"] .text-slate-800,
  [data-theme="dark"] .text-slate-700,
  [data-theme="dark"] .text-gray-900,
  [data-theme="dark"] .text-gray-800,
  [data-theme="dark"] .text-gray-700 { color: var(--text-base) !important; }
  [data-theme="dark"] .text-slate-600,
  [data-theme="dark"] .text-slate-500,
  [data-theme="dark"] .text-slate-400,
  [data-theme="dark"] .text-gray-600,
  [data-theme="dark"] .text-gray-500,
  [data-theme="dark"] .text-gray-400 { color: var(--text-subdued) !important; }
  [data-theme="dark"] .border-slate-200,
  [data-theme="dark"] .border-slate-100,
  [data-theme="dark"] .border-gray-200 { border-color: var(--border-button) !important; }
  .text-green-700, .text-green-800, .text-emerald-600, .text-emerald-700, .text-emerald-800 {
    color: var(--spotify-green) !important;
  }
  [data-theme="dark"] .bg-emerald-50,
  [data-theme="dark"] .bg-green-50,
  [data-theme="dark"] .bg-green-100 { background-color: var(--green-bg) !important; }
  [data-theme="dark"] .border-emerald-500,
  [data-theme="dark"] .border-emerald-600 { border-color: var(--spotify-green) !important; }
  [data-theme="dark"] .hover\:bg-emerald-50:hover { background-color: var(--green-bg) !important; }
  [data-theme="dark"] .hover\:bg-slate-50:hover,
  [data-theme="dark"] .hover\:bg-gray-50:hover { background-color: var(--bg-interactive) !important; }
  [data-theme="dark"] .hover\:bg-slate-100:hover { background-color: var(--surface-card) !important; }
}

/* Shared semantic UI blocks */
.chat-header-accent { background: var(--header-accent-bg); }
.catbot-header {
  background: var(--catbot-header-bg) !important;
  border-color: color-mix(in srgb, var(--spotify-green) 35%, var(--border)) !important;
}
.catbot-title { color: var(--catbot-title-color); }
.catbot-subtitle { color: var(--catbot-subtitle-color); }
.catbot-bubble-assistant {
  background: var(--catbot-bubble-assistant-bg);
  color: var(--catbot-bubble-assistant-text);
  box-shadow: var(--shadow-medium);
}
.chat-bubble-assistant {
  background: var(--bubble-assistant-bg);
  color: var(--text-base);
  box-shadow: var(--shadow-medium);
}
.chat-bubble-user {
  background: var(--bubble-user-bg);
  color: var(--bubble-user-text);
}
.accent-hover:hover {
  border-color: var(--spotify-green);
  background: var(--green-bg);
}
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-circle);
  border: 1px solid var(--border-button);
  background: var(--bg-interactive);
  color: var(--text-subdued);
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}
.theme-toggle-btn:hover {
  color: var(--text-base);
  border-color: var(--spotify-green);
}