@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=IBM+Plex+Mono:wght@400;500&display=swap");

:root {
  --bg: #f4ede2;
  --bg-accent: #e7f1f0;
  --surface: rgba(255, 251, 246, 0.9);
  --surface-strong: rgba(255, 255, 255, 0.94);
  --border: rgba(24, 46, 56, 0.12);
  --text: #13232c;
  --muted: #5d6a70;
  --accent: #c5532f;
  --accent-deep: #7a2f1a;
  --signal: #0d7c66;
  --signal-soft: rgba(13, 124, 102, 0.14);
  --shadow: 0 24px 50px rgba(33, 48, 55, 0.12);
  --shadow-hover: 0 32px 70px rgba(33, 48, 55, 0.18);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --gap-sm: 14px;
  --gap-md: 24px;
  --gap-lg: 36px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(197, 83, 47, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(13, 124, 102, 0.18), transparent 26%),
    linear-gradient(145deg, #f7efe4 0%, #edf6f4 48%, #f5ebdf 100%);
  font-family: "Space Grotesk", "Avenir Next", sans-serif;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: auto;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  filter: blur(12px);
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

body::before {
  right: -80px;
  top: 120px;
  background: rgba(197, 83, 47, 0.18);
}

body::after {
  left: -100px;
  bottom: 40px;
  background: rgba(13, 124, 102, 0.14);
}

a {
  color: inherit;
  text-decoration: none;
}

code,
pre,
.mono-label {
  font-family: "IBM Plex Mono", "SFMono-Regular", monospace;
}

.page-shell {
  position: relative;
  z-index: 1;
  width: min(1240px, calc(100vw - 48px));
  margin: 0 auto;
  padding: 24px 0 80px;
}

main {
  display: grid;
  gap: var(--gap-lg);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0 24px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
}

.brand-kicker,
.eyebrow {
  color: var(--accent-deep);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.nav-links a {
  min-height: 38px;
  padding: 9px 14px;
  border: 1px solid rgba(19, 35, 44, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.42);
  color: var(--muted);
  font-weight: 500;
  transition: color 180ms ease, transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.nav-links a:hover {
  background: rgba(255, 255, 255, 0.86);
  border-color: rgba(197, 83, 47, 0.18);
  color: var(--text);
  transform: translateY(-1px);
}

.hero,
.dual-grid,
.brief-grid,
.playground-grid,
.playground-summary,
.guide-grid,
.status-overview,
.feature-strip,
.stats-grid,
.route-grid,
.task-grid {
  display: grid;
  gap: var(--gap-md);
}

.hero {
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.95fr);
  align-items: stretch;
  min-height: 520px;
}

.hero-copy,
.floating-panel,
.feature-card,
.task-card,
.route-card,
.stat-card {
  background: var(--surface);
  backdrop-filter: blur(18px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.hero-copy,
.floating-panel {
  border-radius: var(--radius-xl);
}

.hero-copy {
  padding: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  animation: rise-in 650ms ease both;
}

.hero-copy h1,
.section-heading h1 {
  margin: 12px 0;
  font-size: clamp(2.8rem, 6vw, 5.6rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
}

.hero-text,
.section-copy {
  max-width: 56ch;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 12px 22px rgba(33, 48, 55, 0.08);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 34px rgba(33, 48, 55, 0.14);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
  transform: none;
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), #dd7e36);
  color: #fff;
}

.button-secondary {
  background: rgba(19, 35, 44, 0.06);
  border-color: rgba(19, 35, 44, 0.08);
}

.hero-panel,
.big-status-card {
  padding: 24px;
  animation: rise-in 800ms ease both;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  font-weight: 700;
}

.live-pill,
.badge,
.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--signal-soft);
  color: var(--signal);
  font-size: 0.86rem;
  font-weight: 700;
}

.live-pill.is-pending,
.status-chip.is-pending {
  background: rgba(197, 83, 47, 0.12);
  color: var(--accent-deep);
}

.stats-grid,
.feature-strip,
.status-overview {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.hero-panel .stats-grid {
  gap: 22px;
}

.hero-panel .stat-card {
  display: grid;
  align-content: space-between;
  min-height: 142px;
  min-width: 0;
  overflow: hidden;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.78), rgba(255, 247, 241, 0.84));
}

.hero-panel .stat-card-text {
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.82), rgba(238, 250, 247, 0.9));
}

.feature-strip {
  margin-top: 0;
}

.guide-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.guide-card {
  min-height: 168px;
  padding: 24px;
  border: 1px solid rgba(19, 35, 44, 0.1);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 16px 34px rgba(33, 48, 55, 0.08);
}

.guide-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  min-height: 34px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(197, 83, 47, 0.12);
  color: var(--accent-deep);
  font-weight: 700;
}

.guide-card strong {
  display: block;
  margin-top: 16px;
  font-size: 1.2rem;
}

.guide-card p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.stat-card,
.feature-card,
.task-card,
.route-card,
.endpoint-card,
.flow-card {
  border-radius: var(--radius-lg);
  padding: 24px;
}

.stat-card,
.feature-card,
.task-card,
.route-card,
.guide-card,
.summary-card,
.endpoint-card,
.flow-card {
  transition: transform 190ms ease, box-shadow 190ms ease, border-color 190ms ease, background 190ms ease;
}

.stat-card:hover,
.feature-card:hover,
.task-card:hover,
.route-card:hover,
.guide-card:hover,
.summary-card:hover,
.endpoint-card:hover,
.flow-card:hover {
  transform: translateY(-5px);
  border-color: rgba(197, 83, 47, 0.22);
  box-shadow: var(--shadow-hover);
}

.stat-label,
.status-caption {
  display: block;
  color: var(--muted);
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stat-value,
.status-display {
  display: block;
  margin-top: 12px;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  line-height: 1;
}

.hero-panel .stat-value {
  white-space: nowrap;
}

.hero-panel .stat-value-text {
  font-size: clamp(1.55rem, 2.8vw, 2.35rem);
  letter-spacing: -0.04em;
}

.stat-note {
  display: inline-flex;
  width: fit-content;
  margin-top: 14px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(19, 35, 44, 0.06);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.feature-card {
  min-height: 220px;
}

.feature-index {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.feature-card h2,
.task-card h3,
.route-card strong {
  margin: 16px 0 12px;
  font-size: 1.4rem;
}

.feature-card p,
.task-card p,
.route-card span,
.status-helper,
.copy-block p,
.bullet-list {
  color: var(--muted);
  line-height: 1.7;
}

.tasks-section,
.stack-layout {
  display: grid;
  gap: var(--gap-lg);
  margin-top: 0;
}

.section-heading {
  padding-top: 8px;
}

.section-heading h2 {
  margin: 8px 0 0;
  font-size: clamp(1.9rem, 4vw, 3.4rem);
  line-height: 1.02;
}

.section-heading.compact h2 {
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.task-grid,
.route-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
}

.task-card {
  position: relative;
  overflow: hidden;
  display: grid;
  min-height: 245px;
  grid-template-rows: 32px minmax(92px, auto) minmax(36px, auto) minmax(72px, 1fr);
  align-content: start;
  gap: 16px;
}

.task-card::after {
  content: "";
  position: absolute;
  inset: auto -20% -60% auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(13, 124, 102, 0.12), transparent 70%);
}

.task-meta,
.task-values {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 0;
}

.task-card-content {
  display: grid;
  align-content: start;
  min-height: 92px;
}

.task-card > .badge:first-child {
  width: fit-content;
}

.task-card h3 {
  min-height: 3.05em;
}

.task-card p {
  margin: 0;
}

.task-values {
  align-content: start;
}

.badge {
  background: rgba(19, 35, 44, 0.06);
  color: var(--text);
}

.difficulty-easy {
  background: rgba(13, 124, 102, 0.14);
  color: var(--signal);
}

.difficulty-medium {
  background: rgba(227, 154, 52, 0.16);
  color: #8b5a12;
}

.difficulty-hard {
  background: rgba(197, 83, 47, 0.14);
  color: var(--accent-deep);
}

.routes-section {
  margin-top: 0;
  padding: 32px;
}

.routes-section .route-grid {
  gap: 28px;
  margin-top: 24px;
}

.route-card {
  min-height: 150px;
  display: grid;
  align-content: start;
  gap: 12px;
}

.status-overview {
  grid-template-columns: 1.2fr 1fr 1fr;
}

.big-status-card {
  background: linear-gradient(145deg, rgba(255, 247, 241, 0.92), rgba(243, 255, 251, 0.82));
}

.dual-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.brief-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
  align-items: stretch;
}

.floating-panel {
  padding: 34px;
}

.playground-grid {
  grid-template-columns: minmax(320px, 0.9fr) minmax(360px, 1fr);
  align-items: start;
  gap: 30px;
}

.control-panel {
  min-height: 100%;
}

.preset-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 20px 0;
}

.preset-button {
  min-height: 44px;
  border: 1px solid rgba(19, 35, 44, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.preset-button:hover {
  transform: translateY(-1px);
  border-color: rgba(197, 83, 47, 0.28);
  background: rgba(255, 255, 255, 0.94);
}

.ui-message {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(19, 35, 44, 0.05);
  color: var(--muted);
  line-height: 1.5;
}

.ui-message[data-mode="success"] {
  background: var(--signal-soft);
  color: var(--signal);
}

.ui-message[data-mode="error"] {
  background: rgba(197, 83, 47, 0.14);
  color: var(--accent-deep);
}

.playground-summary {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap-md);
}

.summary-card {
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-strong);
  box-shadow: 0 14px 30px rgba(33, 48, 55, 0.08);
}

.summary-card span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.summary-card strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(1.2rem, 3vw, 2rem);
}

.brief-card {
  display: grid;
  align-content: start;
  gap: 22px;
  min-height: 420px;
}

.brief-alert {
  margin: 0;
  padding: 22px;
  border: 1px solid rgba(197, 83, 47, 0.14);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(145deg, rgba(255, 247, 241, 0.92), rgba(255, 255, 255, 0.76));
  color: var(--text);
  font-size: clamp(1.02rem, 2vw, 1.28rem);
  font-weight: 700;
  line-height: 1.55;
}

.brief-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.brief-meta-grid > div {
  min-height: 96px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.62);
}

.brief-meta-grid span,
.brief-label {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brief-meta-grid strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(1.05rem, 2vw, 1.45rem);
  line-height: 1.18;
  overflow-wrap: anywhere;
}

.brief-block {
  display: grid;
  gap: 12px;
}

.brief-chip-row,
.context-chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.context-chip {
  display: inline-grid;
  gap: 4px;
  max-width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(19, 35, 44, 0.08);
  border-radius: 16px;
  background: rgba(19, 35, 44, 0.04);
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.35;
}

.context-chip strong {
  color: var(--text);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result-brief-card {
  background:
    radial-gradient(circle at 100% 0%, rgba(13, 124, 102, 0.16), transparent 30%),
    var(--surface);
}

.result-verdict {
  min-height: 72px;
  padding: 18px 20px;
  border-radius: var(--radius-lg);
  background: rgba(19, 35, 44, 0.06);
  color: var(--muted);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.result-verdict[data-outcome="correct"] {
  background: var(--signal-soft);
  color: var(--signal);
}

.result-verdict[data-outcome="partial"] {
  background: rgba(227, 154, 52, 0.16);
  color: #8b5a12;
}

.result-verdict[data-outcome="incorrect"] {
  background: rgba(197, 83, 47, 0.14);
  color: var(--accent-deep);
}

.result-verdict[data-outcome="waiting"] {
  background: rgba(19, 35, 44, 0.06);
  color: var(--muted);
}

.brief-reason {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.badge-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.copy-block,
.bullet-list {
  margin: 0;
  padding: 0;
}

.bullet-list {
  list-style: none;
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.bullet-list li {
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: rgba(19, 35, 44, 0.04);
}

.form-grid {
  display: grid;
  gap: 18px;
}

.form-grid label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 500;
}

.form-grid input,
.form-grid select,
.form-grid small,
.form-grid button {
  width: 100%;
}

.form-grid input,
.form-grid select {
  min-height: 50px;
  padding: 0 16px;
  border-radius: 16px;
  border: 1px solid rgba(19, 35, 44, 0.12);
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  font: inherit;
}

.form-grid input:focus,
.form-grid select:focus {
  border-color: rgba(197, 83, 47, 0.45);
  box-shadow: 0 0 0 4px rgba(197, 83, 47, 0.1);
  outline: none;
}

.form-grid small {
  display: block;
  color: var(--muted);
  line-height: 1.45;
}

.form-grid input:disabled {
  color: var(--muted);
}

.inline-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.code-panel {
  min-height: 340px;
  margin: 0;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 32%),
    #101a21;
  color: #e7f3f0;
  overflow: auto;
  font-size: 0.92rem;
  line-height: 1.6;
}

.api-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: var(--gap-md);
  align-items: stretch;
  background:
    radial-gradient(circle at 12% 12%, rgba(197, 83, 47, 0.16), transparent 28%),
    linear-gradient(135deg, rgba(255, 251, 246, 0.95), rgba(235, 248, 245, 0.9));
}

.api-hero h1 {
  margin: 10px 0;
  max-width: 10ch;
  font-size: clamp(2.5rem, 5.4vw, 5rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
}

.api-health-card {
  display: grid;
  align-content: center;
  min-height: 240px;
  padding: 26px;
  border: 1px solid rgba(19, 35, 44, 0.1);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
}

.api-health-card strong {
  display: block;
  margin-top: 14px;
  font-size: clamp(2.2rem, 4vw, 4rem);
  letter-spacing: -0.05em;
}

.api-health-card p {
  color: var(--muted);
  line-height: 1.7;
}

.api-flow-grid,
.endpoint-grid {
  display: grid;
  gap: var(--gap-md);
}

.api-flow-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.flow-card,
.endpoint-card {
  border: 1px solid var(--border);
  background: var(--surface-strong);
  box-shadow: 0 16px 34px rgba(33, 48, 55, 0.08);
}

.flow-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  min-height: 38px;
  border-radius: 999px;
  background: rgba(13, 124, 102, 0.14);
  color: var(--signal);
  font-weight: 700;
}

.flow-card strong,
.endpoint-card h3 {
  display: block;
  margin-top: 16px;
  font-size: 1.35rem;
}

.flow-card p,
.endpoint-card p {
  color: var(--muted);
  line-height: 1.7;
}

.endpoint-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: var(--gap-md);
}

.endpoint-card {
  display: grid;
  gap: 14px;
  min-height: 290px;
  align-content: start;
}

.endpoint-card-header,
.endpoint-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.endpoint-card-header code {
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(19, 35, 44, 0.06);
  color: var(--text);
}

.endpoint-link {
  width: fit-content;
  margin-top: auto;
}

.method-get {
  background: rgba(13, 124, 102, 0.14);
  color: var(--signal);
}

.method-post {
  background: rgba(197, 83, 47, 0.14);
  color: var(--accent-deep);
}

.output-grid {
  align-items: stretch;
}

.skeleton-card {
  min-height: 220px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.55));
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite linear;
}

@keyframes shimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1080px) {
  .hero,
  .dual-grid,
  .brief-grid,
  .playground-grid,
  .playground-summary,
  .guide-grid,
  .status-overview,
  .task-grid,
  .route-grid,
  .api-hero,
  .api-flow-grid,
  .endpoint-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid,
  .feature-strip,
  .brief-meta-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 24px, 1180px);
    padding-top: 12px;
    padding-bottom: 40px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-copy,
  .floating-panel,
  .routes-section {
    padding: 24px;
  }

  .preset-row {
    grid-template-columns: 1fr;
  }

  .stats-grid,
  .feature-strip,
  .brief-meta-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy h1,
  .section-heading h1 {
    font-size: clamp(2.4rem, 14vw, 3.6rem);
  }

  .section-heading h2 {
    font-size: clamp(1.6rem, 8vw, 2.4rem);
  }

  .hero-actions {
    flex-direction: column;
  }
}