/* ============================================================
   SignLens
   Real-time sign language readout.

   Design read: instrument UI, not a marketing page. The camera
   feed and the skeleton overlay are the moving content, so the
   chrome around them stays still and quiet on purpose.

   Locks (one each, applied everywhere):
     Theme   dark only. A bright page reflects off the signer and
             washes out the very hand the model has to read.
     Accent  amber. Semantic red for failure. Nothing else.
     Radius  panels 18px / controls 10px / pills full.
     Numbers always Geist Mono. Text always Geist.
   ============================================================ */

:root {
  /* Ground. Near-black, very slightly warm, never #000. */
  --bg:          #0a0a0b;
  --surface:     #121213;
  --surface-2:   #17171a;
  --surface-3:   #1e1e22;

  --line:        #26262b;
  --line-bright: #37373e;

  --text:        #f2f1ee;
  --text-dim:    #9c9a95;
  --text-mute:   #6b6963;

  /* Single accent. Live state, focus, fill, active control. */
  --accent:      #f0a53f;
  --accent-soft: color-mix(in oklab, var(--accent) 16%, transparent);
  --accent-line: color-mix(in oklab, var(--accent) 38%, transparent);
  --accent-text: #ffcb84;

  /* Semantic failure only. Never decorative. */
  --danger:      #e2574a;
  --danger-soft: color-mix(in oklab, var(--danger) 14%, transparent);
  --danger-line: color-mix(in oklab, var(--danger) 36%, transparent);

  /* One radius system. */
  --r-panel: 18px;
  --r-ctrl:  10px;
  --r-pill:  999px;

  /* Motion. Feedback only, so short and flat. */
  --dur:      180ms;
  --dur-slow: 420ms;
  --ease:     cubic-bezier(0.2, 0, 1, 1);

  --focus: 0 0 0 2px var(--bg), 0 0 0 4px var(--accent);

  --font: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", "JetBrains Mono", monospace;
}

/* ── Light Mode Palette ──────────────────────────────────────────────── */
:root[data-theme="light"],
[data-theme="light"] {
  --bg:          #f4f5f8;
  --surface:     #ffffff;
  --surface-2:   #eceef3;
  --surface-3:   #e1e4ec;

  --line:        #d5d8e2;
  --line-bright: #b8bdcb;

  --text:        #141518;
  --text-dim:    #4e525d;
  --text-mute:   #7d8291;

  --accent:      #d97706;
  --accent-soft: color-mix(in oklab, var(--accent) 14%, transparent);
  --accent-line: color-mix(in oklab, var(--accent) 40%, transparent);
  --accent-text: #92400e;

  --danger:      #dc2626;
  --danger-soft: color-mix(in oklab, var(--danger) 14%, transparent);
  --danger-line: color-mix(in oklab, var(--danger) 38%, transparent);
}

/* Streak fill, registered so the dial can interpolate instead of jumping. */
@property --streak {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}

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

html {
  color-scheme: dark;
}

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

body {
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Every numeral in the UI is tabular mono, so live values do not
   reflow their neighbours as they tick. */
.detected-letter, .streak-label, .field-value, .step-n,
kbd, .word-chip, .cam-error-code {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

::selection { background: var(--accent-soft); color: var(--text); }

:where(button, input, [popovertarget]):focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

/* ── Top bar ───────────────────────────────────────────────────────────
   Fixed 64px. Three zones, single line, never wraps. */
.topbar {
  flex: none;
  height: 64px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding-inline: 20px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-mark { width: 18px; height: 18px; fill: var(--accent); flex: none; }
.brand-name {
  font-size: 0.95rem; font-weight: 600; letter-spacing: -0.01em;
  white-space: nowrap;
}

.topbar-right {
  display: flex; align-items: center; justify-content: flex-end;
  gap: 8px; min-width: 0;
}

/* ── Mode toggle ───────────────────────────────────────────────────── */
.mode-toggle {
  position: relative;
  display: flex;
  padding: 3px;
  gap: 2px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
}
.mode-btn {
  position: relative; z-index: 2;
  flex: 1 1 0;
  min-width: 72px;
  padding: 6px 14px;
  text-align: center;
  border: none; background: none;
  border-radius: var(--r-pill);
  font-family: var(--font);
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.04em;
  color: var(--text-mute);
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}
.mode-btn:hover { color: var(--text-dim); }
.mode-btn.active { color: #23180a; }

.mode-slider {
  position: absolute; z-index: 1;
  top: 3px; left: 3px;
  width: calc((100% - 12px) / 4); height: calc(100% - 6px);
  background: var(--accent);
  border-radius: var(--r-pill);
  transition: transform var(--dur-slow) var(--ease);
}
.mode-toggle.isl-mode .mode-slider { transform: translateX(calc(100% + 2px)); }
.mode-toggle.visually-mode .mode-slider { transform: translateX(calc(200% + 4px)); }
.mode-toggle.upload-mode .mode-slider { transform: translateX(calc(300% + 6px)); }

.hidden,
.hidden * {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

/* ── Status pill ───────────────────────────────────────────────────── */
.status-pill {
  display: flex; align-items: center; gap: 7px;
  padding: 5px 12px 5px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--surface-2);
  font-size: 0.75rem; font-weight: 500;
  color: var(--text-dim);
  white-space: nowrap;
}
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--text-mute);
  flex: none;
}
.status-pill.loading .status-dot { background: var(--accent); }
.status-pill.ready,
.status-pill.ok {
  color: var(--accent-text);
  border-color: var(--accent-line);
  background: var(--accent-soft);
}
.status-pill.ready .status-dot,
.status-pill.ok .status-dot { background: var(--accent); }
.status-pill.err {
  color: var(--danger);
  border-color: var(--danger-line);
  background: var(--danger-soft);
}
.status-pill.err .status-dot { background: var(--danger); }

/* ── Workspace ─────────────────────────────────────────────────────────
   Stage carries the weight, rail is a fixed-ish column beside it. */
.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(330px, 0.85fr);
  gap: 18px;
  padding: 18px 20px;
  align-items: stretch;
  min-height: 0;
  overflow: hidden;
}

/* ── Stage ─────────────────────────────────────────────────────────── */
.stage {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  min-height: 0;
}

.viewport {
  position: relative;
  flex: 1;
  min-height: 0;
  aspect-ratio: 4 / 3;
  width: auto;
  max-width: 100%;
  margin-inline: auto;
  overflow: hidden;
  background: #000;
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
}
@supports (corner-shape: squircle) {
  .viewport, .panel, .sheet { corner-shape: squircle; }
}

#webcam-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
  z-index: -1;
}

#display-canvas {
  display: block;
  width: 100%; height: 100%;
  object-fit: contain;
  transition: transform var(--dur) var(--ease);
}

#display-canvas.mirrored {
  transform: scaleX(-1);
}

/* ── Idle / error overlay ──────────────────────────────────────────────
   app.js toggles `.visible` for idle and `.error` for camera failure. */
.no-hand-overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 6px;
  padding: 0 32px;
  text-align: center;
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-slow) var(--ease);
}
.no-hand-overlay.visible { opacity: 1; }
.no-hand-overlay.hidden  { opacity: 0; }

.idle-title { font-size: 0.95rem; font-weight: 500; color: var(--text); }
.idle-sub   { font-size: 0.8rem; color: var(--text-mute); text-wrap: pretty; }

/* Camera failure. Replaces the native alert() camera_utils would raise. */
.no-hand-overlay.error {
  opacity: 1;
  gap: 10px;
  background: color-mix(in oklab, var(--bg) 94%, transparent);
  backdrop-filter: blur(6px);
  pointer-events: auto;
}
.cam-error-icon {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: var(--r-pill);
  background: var(--danger-soft);
  border: 1px solid var(--danger-line);
  color: var(--danger);
  font-size: 1rem;
}
.cam-error-title { font-size: 1rem; font-weight: 600; }
.cam-error-msg {
  font-size: 0.83rem; line-height: 1.55;
  color: var(--text-dim);
  max-width: 46ch;
  text-wrap: pretty;
}
.cam-error-code {
  margin-top: 2px;
  padding: 3px 9px;
  font-size: 0.68rem; letter-spacing: 0.06em;
  color: var(--danger);
  background: var(--danger-soft);
  border: 1px solid var(--danger-line);
  border-radius: var(--r-pill);
}

/* ── Readout ───────────────────────────────────────────────────────────
   The dial is the primary affordance: current letter in the middle,
   capture progress as the ring around it. */
.readout {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 22px;
  flex: none;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
  transition: border-color var(--dur) var(--ease);
}
/* Only light the panel when tracking is actually live. */
.readout:has(.hand-badge.live) { border-color: var(--accent-line); }

.readout-dial {
  position: relative;
  display: grid; place-items: center;
  width: 74px; height: 74px;
  flex: none;
}
.dial-ring {
  position: absolute; inset: 0;
  border-radius: 50%;
  /* --streak is written by app.js alongside the bar width. */
  background: conic-gradient(
    var(--accent) calc(var(--streak, 0) * 1%),
    var(--surface-3) 0
  );
  mask: radial-gradient(closest-side, transparent calc(100% - 4px), #000 calc(100% - 3px));
  transition: --streak var(--dur) linear;
}
.detected-letter {
  font-size: 2.1rem; font-weight: 600; line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);
}
/* Null state: a dimmed placeholder, so the dial never collapses. */
.detected-letter:empty::after {
  content: "·";
  color: var(--text-mute);
}
.detected-letter.flash { animation: capture 420ms var(--ease); }
@keyframes capture {
  0%   { transform: scale(1);    color: var(--text); }
  30%  { transform: scale(1.16); color: var(--accent); }
  100% { transform: scale(1);    color: var(--text); }
}

.readout-body {
  display: flex; flex-direction: column; gap: 9px;
  min-width: 0; max-width: 340px;
}
.readout-line { display: flex; align-items: center; gap: 10px; }

.detected-sub {
  font-size: 0.82rem; color: var(--text-dim);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.hand-badge {
  flex: none;
  padding: 3px 9px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-bright);
  background: var(--surface-2);
  font-size: 0.63rem; font-weight: 600; letter-spacing: 0.09em;
  color: var(--text-mute);
  transition: color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.hand-badge.live,
.hand-badge.detected {
  color: var(--accent-text);
  background: var(--accent-soft);
  border-color: var(--accent-line);
}

.streak-row { display: flex; align-items: center; gap: 10px; }
.streak-track {
  flex: 1;
  height: 3px;
  background: var(--surface-3);
  border-radius: var(--r-pill);
  overflow: hidden;
}
.streak-fill {
  height: 100%; width: 0;
  background: var(--accent);
  border-radius: inherit;
  transition: width var(--dur) linear;
}
.streak-label { font-size: 0.7rem; color: var(--text-mute); flex: none; }

.stage-actions { display: flex; gap: 8px; flex: none; }

/* ── Controls ──────────────────────────────────────────────────────── */
.ctrl-btn, .btn, .ghost-btn {
  font-family: var(--font);
  font-size: 0.8rem; font-weight: 500;
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--r-ctrl);
  padding: 8px 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.ctrl-btn:hover, .btn:hover, .ghost-btn:hover {
  color: var(--text);
  background: var(--surface-3);
  border-color: var(--line-bright);
}
.ctrl-btn:active, .btn:active, .ghost-btn:active { transform: scale(0.98); }

.ghost-btn { background: none; border-color: transparent; padding: 7px 11px; }

/* Pause / Stop Camera when engaged. Amber = a live control is on. */
.ctrl-btn.active-btn {
  color: var(--accent-text);
  background: var(--accent-soft);
  border-color: var(--accent-line);
}

.btn-sm { padding: 5px 11px; font-size: 0.74rem; }
.btn-quiet { color: var(--text-mute); }

.btn-danger {
  width: 100%;
  margin-top: 2px;
  color: var(--danger);
  background: var(--danger-soft);
  border-color: var(--danger-line);
}
.btn-danger:hover {
  color: #fff;
  background: var(--danger);
  border-color: var(--danger);
}

/* ── Rail ──────────────────────────────────────────────────────────────
   Panels size against the rail's own width, not the viewport, so the
   layout holds wherever the rail ends up. */
.rail {
  container-type: inline-size;
  container-name: rail;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  min-height: 0;
  overflow-y: auto;
}

.panel-grow { flex: 1; min-height: 0; }
.panel-grow .sentence-display { flex: 1; overflow-y: auto; }

.panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
}

.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.panel-title {
  font-size: 0.68rem; font-weight: 600;
  letter-spacing: 0.11em; text-transform: uppercase;
  color: var(--text-mute);
}
.panel-head-actions { display: flex; gap: 6px; }

.word-display {
  min-height: 62px;
  display: flex; align-items: center;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-ctrl);
  font-family: var(--mono);
  font-size: 1.6rem; font-weight: 500;
  letter-spacing: 0.1em;
  word-break: break-all;
}

.sentence-display {
  min-height: 74px;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-ctrl);
  font-size: 1rem; line-height: 1.55;
  text-wrap: pretty;
}

.ph { color: var(--text-mute); font-style: normal; letter-spacing: 0; font-size: 0.85rem; }

.panel-actions { display: flex; gap: 7px; }
.panel-actions .btn { flex: 1; padding-inline: 8px; }

/* Chip row only earns its margin once there are chips in it. */
.word-chips { display: none; flex-wrap: wrap; gap: 6px; }
#sentence-panel:has(.word-chip) .word-chips { display: flex; }

.word-chip {
  padding: 3px 9px;
  background: var(--surface-3);
  border: 1px solid var(--line-bright);
  border-radius: var(--r-pill);
  font-size: 0.72rem;
  color: var(--text-dim);
  animation: chip-in 220ms var(--ease);
}
@keyframes chip-in {
  from { opacity: 0; transform: translateY(3px); }
  to   { opacity: 1; transform: none; }
}

/* Narrow rail: actions stack rather than crushing their labels. */
@container rail (max-width: 300px) {
  .panel-actions { flex-wrap: wrap; }
  .panel-actions .btn { flex: 1 1 100%; }
  .word-display { font-size: 1.3rem; }
}

/* ── Sheets (Popover API, top layer) ──────────────────────────────────
   Popover keeps these out of the z-index stack entirely, and gives
   light-dismiss plus Esc for free. */
/* Native popovers: strictly hide them when not open so they never occupy space or bleed into live view */
.sheet:not(:popover-open),
[popover]:not(:popover-open) {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
  opacity: 0 !important;
}

.sheet {
  width: min(420px, calc(100vw - 32px));
  padding: 18px;
  border: 1px solid var(--line-bright);
  border-radius: var(--r-panel);
  background: var(--surface);
  color: var(--text);
  inset: auto;
  position: fixed;
  top: 70px; right: 20px;
  margin: 0;
  display: none;
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  transition-property: opacity, transform, display, overlay;
  transition-duration: var(--dur);
  transition-timing-function: var(--ease);
  transition-behavior: allow-discrete;
}
.sheet:popover-open,
.sheet.open {
  display: flex !important;
  flex-direction: column;
  visibility: visible !important;
  pointer-events: auto !important;
  opacity: 1 !important;
  transform: none !important;

  @starting-style {
    opacity: 0 !important;
    transform: translateY(-6px) scale(0.98) !important;
  }
}
.sheet::backdrop {
  background: color-mix(in oklab, var(--bg) 55%, transparent);
  opacity: 0;
  transition-property: opacity, display, overlay;
  transition-duration: var(--dur);
  transition-behavior: allow-discrete;
}
.sheet:popover-open::backdrop {
  opacity: 1;
  @starting-style { opacity: 0; }
}

.sheet-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.sheet-title { font-size: 0.95rem; font-weight: 600; }

/* ── Fields ────────────────────────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: 7px; }
.field + .field { margin-top: 18px; }
.field label { font-size: 0.82rem; font-weight: 500; color: var(--text); }
.field-row { display: flex; align-items: center; gap: 12px; }
.field-value {
  min-width: 44px; text-align: right;
  font-size: 0.82rem; color: var(--accent-text);
}
.field-help { font-size: 0.76rem; color: var(--text-mute); text-wrap: pretty; }

input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  height: 18px;
  cursor: pointer;
}

/* ── Steps and keys ────────────────────────────────────────────────── */
.steps { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.steps li {
  display: flex; align-items: baseline; gap: 10px;
  font-size: 0.85rem; color: var(--text-dim);
  text-wrap: pretty;
}
.step-n {
  flex: none;
  width: 20px; height: 20px;
  display: grid; place-items: center;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  color: var(--accent-text);
  font-size: 0.68rem;
}

.keys {
  margin-top: 18px; padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 8px;
}
.key-row { display: flex; align-items: center; gap: 10px; font-size: 0.8rem; color: var(--text-dim); }
kbd {
  min-width: 26px;
  padding: 2px 7px;
  background: var(--surface-3);
  border: 1px solid var(--line-bright);
  border-bottom-width: 2px;
  border-radius: 6px;
  font-size: 0.7rem;
  color: var(--text);
  text-align: center;
}

/* ── Toast ─────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 22px; left: 50%;
  padding: 9px 18px;
  background: var(--surface-3);
  border: 1px solid var(--line-bright);
  border-radius: var(--r-pill);
  font-size: 0.82rem;
  color: var(--text);
  box-shadow: 0 8px 28px rgb(0 0 0 / 0.45);
  opacity: 0;
  transform: translateX(-50%) translateY(10px);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Responsive ────────────────────────────────────────────────────── */
@media (max-width: 1000px) {
  body { height: auto; min-height: 100dvh; overflow-y: auto; overflow-x: hidden; }
  .workspace { grid-template-columns: minmax(0, 1fr); overflow: visible; }
  .rail { overflow: visible; }
  .viewport { flex: none; width: 100%; }

  /* Practice Studio (VISUALLY) on tablet/mobile: 3D Avatar at TOP, controls BELOW */
  .visually-workspace {
    display: flex !important;
    flex-direction: column !important;
    grid-template-columns: minmax(0, 1fr) !important;
    overflow: visible !important;
    gap: 14px;
  }
  .visually-workspace .practice-stage {
    order: -1 !important; /* Move 3D Avatar to the top */
    width: 100%;
    flex: none;
  }
  .visually-workspace .practice-input-rail {
    order: 1 !important; /* Move controls & timeline below */
    width: 100%;
    overflow: visible;
  }
  .avatar-viewport {
    min-height: 340px;
    height: 48vh;
    max-height: 460px;
  }
}

@media (max-width: 768px) {
  /* Prevent horizontal blowout & enable smooth native vertical touch scrolling */
  html, body {
    height: auto !important;
    min-height: 100% !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    max-width: 100vw;
    -webkit-overflow-scrolling: touch !important;
  }

  /* ── Top Bar on Mobile ─────────────────────────────────────────── */
  .topbar {
    height: auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 10px;
    position: relative;
    z-index: 50;
  }

  .brand {
    gap: 6px;
    flex: 0 0 auto;
  }
  .brand-name {
    display: inline;
    font-size: 0.88rem;
    font-weight: 700;
  }
  .brand-mark {
    width: 16px;
    height: 16px;
  }

  /* Right-side quick controls */
  .topbar-right {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1 1 auto;
    justify-content: flex-end;
    min-width: 0;
  }

  .ghost-btn {
    padding: 5px 8px;
    font-size: 0.74rem;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .guide-btn svg {
    margin-right: 2px;
  }

  /* Hide verbose guide text on mobile topbar to avoid crowding the row */
  .topbar-right .guide-btn span {
    display: inline;
  }

  .status-pill {
    font-size: 0.68rem;
    padding: 4px 7px;
    gap: 4px;
    flex-shrink: 0;
  }

  /* Mode Toggle spans full width on row 2 */
  .topbar .mode-toggle {
    order: 3;
    width: 100%;
    margin-top: 2px;
    display: flex;
  }
  .mode-btn {
    flex: 1;
    min-width: 0;
    padding: 7px 10px;
    font-size: 0.75rem;
    text-align: center;
  }

  /* ── Workspace General ─────────────────────────────────────────── */
  .workspace {
    padding: 10px 12px 20px;
    gap: 12px;
    grid-template-columns: minmax(0, 1fr) !important;
    overflow: visible;
  }

  /* ── Live Camera Stage ─────────────────────────────────────────── */
  .stage {
    gap: 10px;
  }

  .viewport {
    aspect-ratio: 4 / 3;
    max-height: 52vh;
    border-radius: 14px;
  }

  /* Readout panel */
  .readout {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 12px;
    padding: 12px;
    border-radius: 14px;
  }

  .readout-dial {
    width: 58px;
    height: 58px;
  }
  .detected-letter {
    font-size: 1.65rem;
  }

  .readout-body {
    max-width: 100%;
    gap: 6px;
  }
  .readout-line {
    gap: 8px;
    flex-wrap: wrap;
  }
  .detected-sub {
    font-size: 0.76rem;
  }
  .hand-badge {
    padding: 2px 7px;
    font-size: 0.6rem;
  }

  /* Stage action buttons (Guide / Pause / Stop Camera) full width row */
  .stage-actions {
    grid-column: 1 / -1;
    display: flex;
    width: 100%;
    gap: 6px;
  }
  .stage-actions .ctrl-btn {
    flex: 1;
    min-width: 0;
    padding: 8px 6px;
    font-size: 0.76rem;
    text-align: center;
  }

  /* ── Output Rail (Word & Sentence Panels) ───────────────────────── */
  .rail {
    gap: 10px;
    overflow: visible;
  }

  .panel {
    padding: 12px;
    gap: 10px;
    border-radius: 14px;
  }

  .word-display {
    min-height: 52px;
    font-size: 1.3rem;
    padding: 8px 12px;
  }

  .panel-actions {
    gap: 6px;
  }
  .panel-actions .btn {
    padding: 8px 6px;
    font-size: 0.75rem;
  }

  .sentence-display {
    min-height: 64px;
    font-size: 0.92rem;
    padding: 10px 12px;
  }

  /* ── VISUALLY (Practice Studio) on Mobile ───────────────────────── */
  .visually-workspace {
    grid-template-columns: minmax(0, 1fr) !important;
    padding: 10px 12px 24px;
    gap: 14px;
  }

  .practice-input-rail {
    width: 100%;
    overflow: visible;
  }

  .practice-panel {
    gap: 12px;
    padding: 12px;
    border-radius: 14px;
  }

  .practice-panel .panel-head {
    flex-wrap: wrap;
    gap: 8px;
  }

  .practice-head-title {
    flex: 1;
    min-width: 120px;
  }

  .practice-dialect-toggle {
    flex: none;
  }
  .dialect-pill {
    padding: 4px 12px;
    font-size: 0.75rem;
  }

  .practice-textarea-box {
    padding: 10px;
    gap: 8px;
  }
  .practice-textarea-box textarea {
    font-size: 0.88rem;
    rows: 3;
  }

  .practice-input-tools {
    flex-wrap: wrap;
    gap: 6px;
  }
  .tool-btn {
    padding: 5px 8px;
    font-size: 0.72rem;
  }

  /* Quick samples horizontal scroll */
  .quick-samples {
    gap: 5px;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .quick-samples::-webkit-scrollbar {
    display: none;
  }
  .sample-chip {
    flex: none;
    padding: 4px 9px;
    font-size: 0.7rem;
  }

  /* Practice Action Row (Demonstrate Sign + Speed) */
  .practice-action-row {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .btn-demo {
    width: 100%;
    justify-content: center;
    padding: 10px 14px;
    font-size: 0.85rem;
  }
  .speed-control {
    justify-content: center;
    width: 100%;
    padding: 4px;
  }
  .speed-btn {
    flex: 1;
    padding: 5px 8px;
    text-align: center;
  }

  /* Sequence Timeline */
  .sequence-chips {
    min-height: 72px;
    max-height: 120px;
    padding: 8px;
    gap: 4px;
  }
  .sequence-chip {
    min-width: 28px;
    height: 28px;
    font-size: 0.78rem;
    padding: 0 6px;
  }

  /* Practice 3D Avatar Stage on Mobile: Avatar at TOP, Controls BELOW */
  .visually-workspace {
    display: flex !important;
    flex-direction: column !important;
    padding: 10px 12px 24px !important;
    gap: 12px !important;
    overflow: visible !important;
    height: auto !important;
    min-height: auto !important;
  }

  .visually-workspace .practice-stage {
    order: -1 !important; /* Move 3D Avatar to the very top */
    width: 100% !important;
    height: auto !important;
    margin-bottom: 4px !important;
  }

  .visually-workspace .practice-input-rail {
    order: 1 !important; /* Controls, text input, timeline placed below */
    width: 100% !important;
    overflow: visible !important;
  }

  .avatar-viewport {
    min-height: 290px !important;
    height: 42vh !important;
    max-height: 380px !important;
    border-radius: 14px;
    position: relative;
    overflow: hidden;
    touch-action: pan-y !important;
  }

  #avatar-canvas-3d,
  #avatar-canvas {
    touch-action: pan-y !important;
  }

  .hud-letter-char {
    font-size: 1.65rem !important;
  }
  .hud-letter-sub {
    font-size: 0.66rem !important;
  }
  .hud-letter-cue {
    display: none !important;
  }

  .avatar-hud-letter {
    top: 10px;
    left: 12px;
    z-index: 5;
    max-width: 55%;
    pointer-events: none;
  }
  .avatar-hud-status {
    top: 10px !important;
    right: 10px !important;
    padding: 3px 8px !important;
    font-size: 0.65rem !important;
    z-index: 10 !important;
  }

  /* Sign Reference Card placed cleanly in top-right of Avatar on Mobile (sitting below status badge, NO overlap!) */
  .avatar-sign-preview {
    top: 42px !important;
    bottom: auto !important;
    right: 10px !important;
    left: auto !important;
    width: 82px !important;
    max-height: 115px !important;
    height: auto !important;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45) !important;
    z-index: 8 !important;
    border-radius: 10px !important;
    overflow: hidden !important;
  }
  .avatar-sign-img-wrap {
    width: 100% !important;
    height: 60px !important;
    aspect-ratio: auto !important;
    background: #000;
  }
  .avatar-sign-info {
    padding: 2px 5px 3px !important;
  }
  .avatar-sign-char {
    font-size: 0.74rem !important;
  }
  .avatar-sign-hands {
    font-size: 0.55rem !important;
    padding: 1px 3px !important;
  }
  .avatar-sign-desc {
    display: none !important;
  }

  /* Floating controls bar in avatar viewport on mobile */
  .avatar-controls-bar {
    min-width: 0 !important;
    width: calc(100% - 16px) !important;
    max-width: calc(100% - 16px) !important;
    bottom: 8px !important;
    padding: 4px 8px !important;
    gap: 6px !important;
    z-index: 10 !important;
  }
  .avatar-ctrl-btn {
    width: 28px !important;
    height: 28px !important;
    font-size: 0.72rem !important;
  }
  .avatar-scrubber {
    height: 4px !important;
  }

  /* ── Sheets & Modals on Mobile ─────────────────────────────────── */
  .sheet {
    top: auto !important;
    bottom: 10px !important;
    right: 10px !important;
    left: 10px !important;
    width: calc(100vw - 20px) !important;
    max-height: 85vh;
    border-radius: 16px;
    padding: 14px;
    transform: none !important;
  }

  /* Crucial: Sign Guide wide modal centered & full size on mobile */
  .sheet.sheet-wide,
  #panel-guide.sheet.sheet-wide {
    position: fixed !important;
    inset: 12px !important;
    top: 12px !important;
    left: 12px !important;
    right: 12px !important;
    bottom: 12px !important;
    width: auto !important;
    max-width: none !important;
    height: auto !important;
    max-height: none !important;
    transform: none !important;
    border-radius: 18px !important;
    box-shadow: 0 16px 60px rgba(0, 0, 0, 0.6) !important;
    z-index: 9999 !important;
  }

  .sheet.sheet-wide:popover-open,
  .sheet.sheet-wide.open,
  #panel-guide.sheet.sheet-wide:popover-open,
  #panel-guide.sheet.sheet-wide.open {
    display: flex !important;
    flex-direction: column !important;
    transform: none !important;
  }

  .sheet-wide .sheet-head {
    padding: 14px 16px;
    flex-wrap: wrap;
    gap: 8px;
    border-bottom: 1px solid var(--line);
  }
  .sheet-title-group {
    flex: 1;
    min-width: 140px;
  }
  .sheet-title-group .sheet-title {
    font-size: 1.05rem;
  }
  .sheet-sub {
    font-size: 0.72rem;
  }
  .guide-tabs {
    width: 100%;
    order: 3;
    display: flex;
  }
  .guide-tab-btn {
    flex: 1;
    justify-content: center;
    padding: 7px 10px;
    font-size: 0.74rem;
  }

  .guide-tab-content {
    padding: 12px 14px 20px;
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .guide-cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(95px, 1fr));
    gap: 8px;
  }

  .guide-card-char {
    font-size: 0.95rem;
  }
  .guide-card-desc {
    font-size: 0.68rem;
    padding: 4px 6px 6px;
  }

  /* Sign Reference Lightbox Dialog on Mobile */
  .sign-lightbox {
    padding: 20px 16px 16px;
    width: calc(100vw - 24px);
    max-width: calc(100vw - 24px);
  }
}

@media (max-width: 400px) {
  /* Extra-compact phones (iPhone SE, narrow Android) */
  .topbar {
    padding: 6px 8px;
    gap: 6px;
  }
  .brand-name {
    font-size: 0.82rem;
  }
  .ghost-btn {
    padding: 4px 6px;
    font-size: 0.68rem;
  }
  .status-pill {
    padding: 3px 6px;
    font-size: 0.64rem;
  }
  .mode-btn {
    font-size: 0.7rem;
    padding: 6px 4px;
  }
  .readout-dial {
    width: 50px;
    height: 50px;
  }
  .detected-letter {
    font-size: 1.45rem;
  }
  .guide-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .avatar-sign-preview {
    width: 76px !important;
    top: 40px !important;
    bottom: auto !important;
  }
}

/* ── Reduced motion ────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ── Reduced transparency ──────────────────────────────────────────── */
@media (prefers-reduced-transparency: reduce) {
  .no-hand-overlay, .no-hand-overlay.error { backdrop-filter: none; background: var(--bg); }
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background: var(--line-bright); border-radius: var(--r-pill); }

/* ══════════════════════════════════════════════════════════════════════
   VISUALLY — Practice Studio
   Interactive 3D avatar & gesture synthesizer matching RyloTranslate.
   ══════════════════════════════════════════════════════════════════════ */

.visually-workspace {
  grid-template-columns: minmax(380px, 0.95fr) minmax(0, 1.45fr);
}

.practice-input-rail {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  min-height: 0;
  overflow: visible;
}

.practice-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow: visible;
}

.practice-head-title {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.practice-badge {
  display: inline-block;
  align-self: flex-start;
  padding: 2px 8px;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent-text);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: var(--r-pill);
}

.practice-dialect-toggle {
  display: flex;
  gap: 4px;
  background: var(--surface-3);
  padding: 3px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  position: relative;
  z-index: 20;
}

.dialect-pill {
  position: relative;
  z-index: 21;
  padding: 5px 16px;
  min-height: 28px;
  border-radius: var(--r-pill);
  border: none;
  background: transparent;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
  transition: all var(--dur) var(--ease);
}

.dialect-pill:hover {
  color: var(--text);
}

.dialect-pill.active {
  background: var(--accent);
  color: #23180a;
}

/* Textarea & Tools */
.practice-textarea-box {
  display: flex;
  flex-direction: column;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--r-ctrl);
  padding: 12px;
  gap: 10px;
  transition: border-color var(--dur) var(--ease);
}

.practice-textarea-box:focus-within {
  border-color: var(--accent-line);
  box-shadow: 0 0 0 1px var(--accent-line);
}

.practice-textarea-box textarea {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  line-height: 1.5;
  resize: none;
  outline: none;
}

.practice-textarea-box textarea::placeholder {
  color: var(--text-mute);
}

.practice-input-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: var(--surface-3);
  border: 1px solid var(--line);
  border-radius: var(--r-ctrl);
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-dim);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.tool-btn:hover {
  color: var(--text);
  border-color: var(--line-bright);
}

.tool-btn .icon {
  width: 15px;
  height: 15px;
  flex: none;
}

.mic-btn.listening {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: var(--danger-line);
  animation: pulse-mic 1.2s infinite ease-in-out;
}

@keyframes pulse-mic {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in oklab, var(--danger) 40%, transparent); }
  50%      { box-shadow: 0 0 0 6px transparent; }
}

.char-count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-mute);
}

/* Quick Samples */
.quick-samples {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.quick-label {
  font-size: 0.75rem;
  color: var(--text-mute);
  margin-right: 2px;
}

.sample-chip {
  padding: 3px 9px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.sample-chip:hover {
  color: var(--accent-text);
  border-color: var(--accent-line);
  background: var(--accent-soft);
}

/* Main Action Row */
.practice-action-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-demo {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-weight: 600;
}

.icon-play {
  width: 16px;
  height: 16px;
}

.speed-control {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--r-ctrl);
  padding: 3px;
}

.speed-label {
  font-size: 0.72rem;
  color: var(--text-mute);
  padding-inline: 6px 2px;
}

.speed-btn {
  padding: 3px 8px;
  background: transparent;
  border: none;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.speed-btn:hover {
  color: var(--text);
}

.speed-btn.active {
  background: var(--surface-3);
  color: var(--accent);
  font-weight: 600;
}

/* Sequence Timeline */
.sequence-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.sequence-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.seq-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

.seq-counter {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-mute);
}

.sequence-chips {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 6px;
  padding: 10px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--r-ctrl);
  min-height: 100px;
  max-height: 180px;
  overflow-y: auto;
}

.sequence-chips .ph {
  color: var(--text-mute);
  font-size: 0.8rem;
  align-self: center;
  margin: auto;
}

.sequence-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  padding: 0 8px;
  background: var(--surface-3);
  border: 1px solid var(--line-bright);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.sequence-chip:hover {
  border-color: var(--accent-line);
  color: var(--accent-text);
}

.sequence-chip.is-space {
  min-width: 22px;
  background: transparent;
  border-style: dashed;
  color: var(--text-mute);
  font-size: 0.65rem;
}

.sequence-chip.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-text);
  box-shadow: 0 0 12px color-mix(in oklab, var(--accent) 35%, transparent);
  transform: scale(1.08);
}

/* ── Practice Avatar Stage ─────────────────────────────────────────────── */
.practice-stage {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  height: 100%;
}

.avatar-viewport {
  position: relative;
  flex: 1;
  width: 100%;
  height: 100%;
  min-height: 480px;
  background: #161619;
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
  overflow: hidden;
}

#avatar-canvas-3d,
#avatar-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

#avatar-canvas-3d {
  z-index: 1;
}

#avatar-canvas {
  z-index: 2;
  pointer-events: none;
}

/* 3D Avatar Loading Indicator Overlay */
.avatar-3d-loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: color-mix(in oklab, var(--bg-card, #161619) 92%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 6;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  pointer-events: auto;
}

.avatar-3d-loading-overlay.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.avatar-loading-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 380px;
  width: 100%;
  padding: 28px 24px;
  border-radius: var(--r-panel, 14px);
  background: var(--bg-card, #1a1a1f);
  border: 1px solid var(--line, rgba(255, 255, 255, 0.1));
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.avatar-loading-spinner-ring {
  position: relative;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  border-radius: 50%;
  border: 3px solid color-mix(in oklab, var(--accent, #6366f1) 20%, transparent);
  border-top-color: var(--accent, #6366f1);
  border-right-color: color-mix(in oklab, var(--accent, #6366f1) 60%, transparent);
  animation: avatarSpin 1.1s cubic-bezier(0.55, 0.15, 0.45, 0.85) infinite;
}

.avatar-loading-core-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--accent, #6366f1);
  box-shadow: 0 0 12px var(--accent, #6366f1);
  animation: avatarPulse 1.8s ease-in-out infinite;
}

@keyframes avatarSpin {
  to { transform: rotate(360deg); }
}

@keyframes avatarPulse {
  0%, 100% { transform: scale(0.85); opacity: 0.6; }
  50% { transform: scale(1.35); opacity: 1; }
}

.avatar-loading-title {
  font-family: var(--sans, 'Geist', sans-serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text, #f1f5f9);
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.avatar-loading-subtitle {
  font-size: 0.8rem;
  color: var(--text-dim, #94a3b8);
  margin-bottom: 16px;
  line-height: 1.4;
  min-height: 1.2rem;
}

.avatar-loading-progress-track {
  width: 100%;
  height: 5px;
  background: color-mix(in oklab, var(--line, rgba(255, 255, 255, 0.1)) 80%, transparent);
  border-radius: 999px;
  overflow: hidden;
}

.avatar-loading-progress-bar {
  width: 25%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent, #6366f1), #a855f7);
  transition: width 0.25s ease-out;
  box-shadow: 0 0 8px color-mix(in oklab, var(--accent, #6366f1) 50%, transparent);
}

/* 3D Avatar Model Missing Placeholder Overlay */
.avatar-3d-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: color-mix(in oklab, var(--bg-card, #161619) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 10;
}

.avatar-3d-placeholder .ph-card {
  max-width: 440px;
  width: 100%;
  padding: 24px 28px;
  border-radius: var(--r-panel, 14px);
  background: var(--bg-card, #1a1a1f);
  border: 1px solid var(--line, rgba(255, 255, 255, 0.1));
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
  text-align: center;
}

.avatar-3d-placeholder .ph-icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.avatar-3d-placeholder .ph-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text, #f1f5f9);
  margin-bottom: 8px;
}

.avatar-3d-placeholder .ph-desc {
  font-size: 0.85rem;
  color: var(--text-dim, #94a3b8);
  margin-bottom: 10px;
  line-height: 1.45;
}

.avatar-3d-placeholder .ph-path {
  display: inline-block;
  padding: 6px 12px;
  margin-bottom: 12px;
  border-radius: 6px;
  background: color-mix(in oklab, var(--accent, #6366f1) 15%, transparent);
  border: 1px solid color-mix(in oklab, var(--accent, #6366f1) 35%, transparent);
  color: var(--accent, #818cf8);
  font-family: var(--mono, monospace);
  font-size: 0.82rem;
  user-select: all;
}

.avatar-3d-placeholder .ph-hint {
  font-size: 0.76rem;
  color: var(--text-dim, #64748b);
  line-height: 1.4;
  margin-bottom: 16px;
}

.avatar-3d-placeholder .ph-btn {
  padding: 8px 18px;
  border-radius: var(--r-ctrl, 8px);
  background: color-mix(in oklab, var(--text, #fff) 10%, transparent);
  border: 1px solid var(--line, rgba(255, 255, 255, 0.15));
  color: var(--text, #f1f5f9);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.avatar-3d-placeholder .ph-btn:hover {
  background: var(--accent, #6366f1);
  color: #fff;
  border-color: transparent;
}

/* Avatar HUD Badges */
.avatar-hud-letter {
  position: absolute;
  top: 18px;
  left: 20px;
  display: flex;
  flex-direction: column;
  pointer-events: none;
}

.hud-letter-char {
  font-family: var(--mono);
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text);
  text-shadow: 0 0 20px color-mix(in oklab, var(--accent) 40%, transparent);
}

.hud-letter-sub {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 4px;
}

.hud-letter-cue {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  padding: 4px 10px;
  border-radius: var(--r-ctrl);
  background: color-mix(in oklab, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in oklab, var(--accent) 30%, transparent);
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--accent);
  max-width: 340px;
  line-height: 1.35;
  backdrop-filter: blur(8px);
}

.avatar-hud-status {
  position: absolute;
  top: 18px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  border-radius: var(--r-pill);
  background: rgb(18 18 19 / 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.status-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-mute);
}

.avatar-hud-status.playing .status-badge-dot {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

/* ── Top-Right Real Human Sign Preview Reference Card ─────────────────── */
.avatar-sign-preview {
  position: absolute;
  top: 54px;
  right: 20px;
  width: 140px;
  background: var(--surface);
  border: 1px solid var(--line-bright);
  border-radius: var(--r-ctrl);
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  z-index: 10;
  cursor: pointer;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.avatar-sign-preview:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.55);
}

.avatar-sign-img-wrap {
  width: 100%;
  aspect-ratio: 1;
  background: #000;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.avatar-sign-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.avatar-sign-badge {
  position: absolute;
  bottom: 6px;
  right: 6px;
  padding: 2px 6px;
  font-size: 0.65rem;
  font-weight: 700;
  font-family: var(--mono);
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  color: var(--accent);
  border-radius: 4px;
  border: 1px solid var(--line-bright);
}

.avatar-sign-info {
  padding: 6px 8px 8px;
  background: var(--surface-2);
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.avatar-sign-char-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.avatar-sign-char {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

.avatar-sign-hands {
  font-size: 0.62rem;
  font-weight: 600;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--surface-3);
  color: var(--text-dim);
}

.avatar-sign-desc {
  font-size: 0.65rem;
  color: var(--text-dim);
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

[data-theme="light"] .avatar-sign-preview {
  background: #ffffff;
  border-color: #cbd5e1;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}
[data-theme="light"] .avatar-sign-info {
  background: #f8fafc;
  border-top-color: #e2e8f0;
}
[data-theme="light"] .avatar-sign-desc {
  color: #64748b;
}

/* Floating Avatar Controls Bar */
.avatar-controls-bar {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: rgb(18 18 20 / 0.88);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line-bright);
  border-radius: var(--r-pill);
  box-shadow: 0 8px 32px rgb(0 0 0 / 0.6);
  z-index: 10;
  min-width: 380px;
  max-width: 90%;
}

.avatar-ctrl-btn {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--surface-3);
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--text);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
  flex: none;
}

.avatar-ctrl-btn:hover {
  background: var(--accent-soft);
  color: var(--accent-text);
  border-color: var(--accent-line);
}

.play-pause-btn {
  background: var(--accent);
  color: #23180a;
  border: none;
}

.play-pause-btn:hover {
  background: #ffb854;
  color: #1a1005;
}

.avatar-progress-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  padding-inline: 6px;
}

.avatar-scrubber {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
  height: 4px;
}

/* ════ SIGN REFERENCE GUIDE MODAL & PHOTO PREVIEW ═══════════════════════ */
.guide-btn {
  background: var(--surface-2);
  border: 1px solid var(--accent-line);
  color: var(--accent-text);
  font-weight: 500;
}
.guide-btn:hover {
  background: var(--accent-soft);
  color: #fff;
  border-color: var(--accent);
}

.sheet.sheet-wide {
  width: min(1040px, calc(100vw - 48px));
  max-height: min(88vh, 880px);
  top: 50%;
  left: 50%;
  right: auto;
  bottom: auto;
  transform: translate(-50%, -50%) scale(0.96);
  padding: 0;
  overflow: hidden;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px var(--line-bright);
}

.sheet.sheet-wide:not(:popover-open):not(.open) {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
  opacity: 0 !important;
}

.sheet.sheet-wide:popover-open,
.sheet.sheet-wide.open {
  display: flex !important;
  flex-direction: column !important;
  visibility: visible !important;
  pointer-events: auto !important;
  opacity: 1 !important;
  transform: translate(-50%, -50%) scale(1) !important;
}

.sheet-wide .sheet-head {
  padding: 20px 28px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.sheet-title-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.sheet-title-group .sheet-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}
.sheet-sub {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.guide-tabs {
  display: inline-flex;
  gap: 4px;
  background: var(--surface-3);
  padding: 4px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
}
.guide-tab-btn {
  padding: 6px 16px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.guide-tab-btn:hover {
  color: var(--text);
}
.guide-tab-btn.active {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 2px 8px color-mix(in oklab, var(--accent) 30%, transparent);
}

.guide-tab-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px 28px;
}

.guide-alert-banner {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  background: color-mix(in oklab, var(--accent) 10%, var(--surface-2));
  border: 1px solid var(--accent-line);
  border-radius: var(--r-ctrl);
  color: var(--text);
  font-size: 0.82rem;
  line-height: 1.45;
  margin-bottom: 20px;
}
.guide-alert-banner kbd {
  background: var(--surface-3);
  padding: 1px 5px;
  border-radius: 4px;
  border: 1px solid var(--line-bright);
  font-family: var(--mono);
  font-size: 0.75rem;
}
.banner-icon {
  font-size: 1.1rem;
  line-height: 1;
}

.guide-section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.guide-section-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.pill-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: var(--r-pill);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.pill-amber {
  background: var(--accent-soft);
  color: var(--accent-text);
  border: 1px solid var(--accent-line);
}
.pill-blue {
  background: color-mix(in oklab, #3b82f6 18%, transparent);
  color: #93c5fd;
  border: 1px solid color-mix(in oklab, #3b82f6 36%, transparent);
}

.guide-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
}

.guide-card {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--r-ctrl);
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  cursor: pointer;
  user-select: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.guide-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-line);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}
.guide-card:active {
  transform: scale(0.98);
}

.guide-card-img-wrap {
  width: 100%;
  aspect-ratio: 1;
  background: #000;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.guide-card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.guide-card-body {
  padding: 8px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface-3);
  border-top: 1px solid var(--line);
}
.guide-card-char {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}
.guide-card-hands {
  font-size: 0.65rem;
  font-weight: 600;
}

.guide-card-desc {
  padding: 6px 10px 10px;
  font-size: 0.72rem;
  color: var(--text-dim);
  line-height: 1.35;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ASL Full Chart view */
.asl-chart-wrap {
  width: 100%;
  border-radius: var(--r-ctrl);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #000;
}
.asl-full-chart {
  width: 100%;
  height: auto;
  display: block;
}

/* Practice Studio Real Human Photo Preview Card - permanently disabled on live screen */
.avatar-photo-ref,
#avatar-photo-ref,
.visually-workspace .avatar-photo-ref,
#live-workspace .avatar-photo-ref,
.hidden .avatar-photo-ref {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
  opacity: 0 !important;
  width: 0 !important;
  height: 0 !important;
  overflow: hidden !important;
}

/* ══════════════════════════════════════════════════════════════════════
   SIGN REFERENCE GUIDE MODAL
   ══════════════════════════════════════════════════════════════════════ */
#panel-guide:not(:popover-open):not(.open) {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
  opacity: 0 !important;
}

#panel-guide:popover-open,
#panel-guide.open {
  display: flex !important;
  flex-direction: column !important;
  visibility: visible !important;
  pointer-events: auto !important;
  opacity: 1 !important;
  transform: translate(-50%, -50%) scale(1) !important;
}

.asl-chart-wrap {
  width: 100%;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #000;
}

.asl-full-chart {
  width: 100%;
  display: block;
  object-fit: contain;
}

/* ── Light Mode Specific Polish & Theme Toggle ───────────────────────── */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 10px;
  min-width: 36px;
  height: 32px;
  cursor: pointer;
  border-radius: var(--r-ctrl);
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1;
  transition: all var(--dur) var(--ease);
}
.theme-toggle-btn:hover {
  background: var(--surface-3);
  border-color: var(--line-bright);
  transform: translateY(-1px);
}
.theme-toggle-btn:active {
  transform: scale(0.95);
}

[data-theme="light"] .mode-btn.active {
  color: #ffffff;
}

[data-theme="light"] .avatar-viewport {
  background: #eaedf4;
}

[data-theme="light"] .guide-card-img-wrap,
[data-theme="light"] .asl-chart-wrap {
  background: #f1f3f8;
}

[data-theme="light"] .topbar {
  background: #ffffff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .sheet {
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .sheet.sheet-wide {
  background: #ffffff;
  border-color: #e2e8f0;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.15), 0 4px 16px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .sheet-wide .sheet-head {
  background: #ffffff;
  border-bottom-color: #e2e8f0;
}

[data-theme="light"] .guide-card {
  background: #ffffff;
  border-color: #e2e8f0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}
[data-theme="light"] .guide-card:hover {
  border-color: var(--accent);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .guide-card-body {
  background: #f8fafc;
  border-top-color: #e2e8f0;
}
[data-theme="light"] .guide-card-desc {
  color: #64748b;
}
[data-theme="light"] .guide-tabs {
  background: #f1f5f9;
  border-color: #e2e8f0;
}
[data-theme="light"] .guide-tab-btn {
  color: #475569;
}
[data-theme="light"] .guide-tab-btn:hover {
  color: #0f172a;
}
[data-theme="light"] .guide-tab-btn.active {
  background: var(--accent);
  color: #ffffff;
}

/* ═══════════════════════════════════════════════════════════════════════════
   SIGN GUIDE LIGHTBOX — fullscreen popup for viewing sign images in detail
   Uses native <dialog> to render above popovers in the Top Layer!
   ═══════════════════════════════════════════════════════════════════════════ */

dialog.sign-lightbox-dialog {
  border: none;
  background: transparent;
  padding: 0;
  margin: 0;
  max-width: 100vw;
  max-height: 100vh;
  width: 100vw;
  height: 100vh;
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2147483647;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

dialog.sign-lightbox-dialog:not([open]) {
  display: none !important;
  pointer-events: none !important;
  visibility: hidden !important;
}

dialog.sign-lightbox-dialog[open] {
  display: flex !important;
  opacity: 1;
  pointer-events: auto;
  visibility: visible !important;
}

dialog.sign-lightbox-dialog::backdrop {
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  transition: opacity 0.25s ease;
}

dialog.sign-lightbox-dialog[open]::backdrop {
  opacity: 1;
}

.sign-lightbox {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--surface-1, #1a1a1e);
  border: 1px solid var(--line, #2a2a2e);
  border-radius: 18px;
  padding: 28px 32px 24px;
  max-width: 420px;
  width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5), 0 8px 24px rgba(0, 0, 0, 0.3);
  transform: scale(0.9) translateY(20px);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

dialog.sign-lightbox-dialog[open] .sign-lightbox {
  transform: scale(1) translateY(0);
}

.sign-lightbox-close {
  position: absolute;
  top: 12px;
  right: 14px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line, #2a2a2e);
  border-radius: 8px;
  background: var(--surface-2, #222226);
  color: var(--text-dim, #888);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.15s ease;
  z-index: 2;
}

.sign-lightbox-close:hover {
  background: var(--surface-3, #333);
  color: var(--text, #fff);
  border-color: var(--accent-line, #e67e22);
}

.sign-lightbox-img-wrap {
  width: 100%;
  max-width: 340px;
  aspect-ratio: 1;
  border-radius: 14px;
  overflow: hidden;
  background: #000;
  border: 1px solid var(--line, #2a2a2e);
  margin-bottom: 18px;
}

.sign-lightbox-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.sign-lightbox-letter {
  font-family: var(--mono, 'Geist Mono', monospace);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text, #fff);
  margin-bottom: 4px;
}

.sign-lightbox-type {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.sign-lightbox-type.one-hand {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.sign-lightbox-type.two-hand {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.25);
}

.sign-lightbox-desc {
  font-size: 0.88rem;
  color: var(--text-dim, #999);
  line-height: 1.5;
  text-align: center;
  margin: 0;
  padding: 0 8px;
}

.sign-lightbox-lang {
  font-size: 0.72rem;
  color: var(--text-dim, #666);
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line, #2a2a2e);
  width: 100%;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

/* Light mode adjustments */
[data-theme="light"] dialog.sign-lightbox-dialog::backdrop {
  background: rgba(255, 255, 255, 0.75);
}

[data-theme="light"] .sign-lightbox {
  background: #fff;
  border-color: #e5e5e5;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.15), 0 8px 24px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .sign-lightbox-img-wrap {
  background: #f5f5f5;
  border-color: #e5e5e5;
}

[data-theme="light"] .sign-lightbox-close {
  background: #f0f0f0;
  border-color: #ddd;
  color: #666;
}

[data-theme="light"] .sign-lightbox-close:hover {
  background: #e5e5e5;
  color: #333;
}

/* ══════════════════════════════════════════════════════════════════════
   UPLOAD SIGN RECOGNITION STUDIO STYLES
   ══════════════════════════════════════════════════════════════════════ */
.upload-workspace {
  grid-template-columns: minmax(320px, 380px) 1fr;
  align-items: stretch;
}

.upload-sidebar {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
}

.upload-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  height: 100%;
}

.upload-badge {
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 3px 7px;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  color: var(--accent-text);
  border: 1px solid var(--accent-line);
  display: inline-block;
  margin-bottom: 4px;
}

.upload-dialect-toggle {
  display: flex;
  background: var(--surface-3);
  padding: 2px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  gap: 2px;
}

.upload-dialect-btn {
  padding: 4px 12px;
  font-family: var(--font);
  font-size: 0.74rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--text-mute);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.upload-dialect-btn:hover {
  color: var(--text);
}

.upload-dialect-btn.active {
  background: var(--accent);
  color: #23180a;
}

[data-theme="light"] .upload-dialect-btn.active {
  color: #fff;
}

/* Drag & Drop Area */
.upload-dropzone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px 18px;
  border: 2px dashed var(--line-bright);
  border-radius: var(--r-panel);
  background: var(--surface-2);
  text-align: center;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.upload-dropzone:hover,
.upload-dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: scale(1.01);
}

.upload-file-hidden {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.dropzone-icon {
  color: var(--accent);
  margin-bottom: 12px;
  transition: transform var(--dur) var(--ease);
}

.upload-dropzone:hover .dropzone-icon {
  transform: translateY(-3px);
}

.dropzone-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.dropzone-sub {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.dropzone-browse {
  color: var(--accent-text);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.dropzone-formats {
  font-size: 0.68rem;
  font-family: var(--mono);
  color: var(--text-mute);
}

/* Samples Section */
.upload-samples-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}

.upload-samples-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-mute);
}

.upload-samples-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sample-img-chip {
  padding: 5px 11px;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 600;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--surface-3);
  color: var(--text-dim);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}

.sample-img-chip:hover {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--accent-text);
  transform: translateY(-1px);
}

/* Upload Stage & Visual Viewport */
.upload-stage {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
}

.upload-viewport {
  position: relative;
  flex: 1;
  width: 100%;
  height: 100%;
  background: #0e0e11;
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

[data-theme="light"] .upload-viewport {
  background: #f0f2f7;
}

.upload-empty-state {
  max-width: 420px;
  padding: 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.upload-empty-icon {
  font-size: 3.5rem;
  margin-bottom: 4px;
  animation: floatHand 3s ease-in-out infinite;
}

@keyframes floatHand {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.upload-empty-state h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
}

.upload-empty-state p {
  font-size: 0.84rem;
  color: var(--text-dim);
  line-height: 1.55;
  margin-bottom: 6px;
}

.upload-canvas-wrap {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 16px;
  box-sizing: border-box;
}

#upload-canvas {
  width: auto;
  height: auto;
  min-width: min(340px, 85%);
  min-height: min(340px, 75%);
  max-width: 92%;
  max-height: 88%;
  object-fit: contain;
  display: block;
  border-radius: 12px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.5);
  background: #141418;
}

/* Floating Results Card inside Viewport */
.upload-result-hud {
  position: absolute;
  top: 18px;
  left: 18px;
  width: 310px;
  max-width: calc(100% - 36px);
  background: rgb(18 18 20 / 0.88);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line-bright);
  border-radius: var(--r-panel);
  padding: 16px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 10;
  animation: hudSlideIn 0.28s cubic-bezier(0.2, 0, 0.2, 1);
}

[data-theme="light"] .upload-result-hud {
  background: rgb(255 255 255 / 0.92);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.12);
}

@keyframes hudSlideIn {
  from { opacity: 0; transform: translateY(-8px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.result-hud-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.result-badge-dialect {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: #23180a;
}

[data-theme="light"] .result-badge-dialect {
  color: #fff;
}

.result-badge-hands {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-dim);
}

.result-main-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.result-letter-huge {
  font-family: var(--mono);
  font-size: 3.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text);
  min-width: 64px;
  text-align: center;
  text-shadow: 0 0 24px color-mix(in oklab, var(--accent) 45%, transparent);
}

.result-details {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.result-conf-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.result-conf-label {
  font-size: 0.72rem;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-conf-val {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-text);
}

.result-desc {
  font-size: 0.76rem;
  color: var(--text-dim);
  line-height: 1.35;
}

/* Top 3 Breakdown */
.result-top3-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.result-top3-title {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-mute);
}

.result-top3-bars {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.top3-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
}

.top3-label {
  font-family: var(--mono);
  font-weight: 700;
  min-width: 22px;
  color: var(--text);
}

.top3-bar-track {
  flex: 1;
  height: 6px;
  background: var(--surface-3);
  border-radius: var(--r-pill);
  overflow: hidden;
}

.top3-bar-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 0.35s ease;
}

.top3-val {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  min-width: 38px;
  text-align: right;
}