/* ============================================
   TestLab — Design System
   Premium practice playground for QA testers
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Brand */
  --tl-blue: #2563eb;
  --tl-blue-dark: #1d4ed8;
  --tl-blue-deep: #1e40af;
  --tl-blue-soft: #eff6ff;
  --tl-blue-mid: #dbeafe;
  --tl-indigo: #6366f1;
  --tl-violet: #7c3aed;

  /* Neutrals */
  --tl-ink: #0f172a;
  --tl-ink-2: #1e293b;
  --tl-muted: #64748b;
  --tl-muted-2: #94a3b8;
  --tl-border: #e2e8f0;
  --tl-border-strong: #cbd5e1;
  --tl-surface: #ffffff;
  --tl-bg: #f8fafc;
  --tl-bg-soft: #f1f5f9;
  --tl-code-bg: #0b1220;

  /* Category accents */
  --cat-forms: #2563eb;
  --cat-forms-bg: #eff6ff;
  --cat-nav: #0891b2;
  --cat-nav-bg: #ecfeff;
  --cat-ui: #7c3aed;
  --cat-ui-bg: #f5f3ff;
  --cat-auto: #dc2626;
  --cat-auto-bg: #fef2f2;
  --cat-apps: #059669;
  --cat-apps-bg: #ecfdf5;
  --cat-adv: #d97706;
  --cat-adv-bg: #fffbeb;
  --cat-dynamic: #ea580c;
  --cat-dynamic-bg: #fff7ed;
  --cat-auth: #4f46e5;
  --cat-auth-bg: #eef2ff;
  --cat-a11y: #0d9488;
  --cat-a11y-bg: #f0fdfa;
  --cat-responsive: #db2777;
  --cat-responsive-bg: #fdf2f8;
  --cat-advauto: #7c3aed;
  --cat-advauto-bg: #f5f3ff;
  --cat-browser: #0284c7;
  --cat-browser-bg: #f0f9ff;
  --cat-interaction: #c026d3;
  --cat-interaction-bg: #fdf4ff;
  --cat-validation: #65a30d;
  --cat-validation-bg: #f7fee7;
  --cat-errors: #e11d48;
  --cat-errors-bg: #fff1f2;

  /* Difficulty */
  --diff-beginner: #059669;
  --diff-intermediate: #d97706;
  --diff-advanced: #dc2626;

  /* Feedback */
  --tl-success: #059669;
  --tl-success-bg: #ecfdf5;
  --tl-error: #dc2626;
  --tl-error-bg: #fef2f2;
  --tl-warn: #d97706;
  --tl-warn-bg: #fffbeb;

  /* Layout */
  --tl-radius: 14px;
  --tl-radius-sm: 10px;
  --tl-radius-xs: 8px;
  --tl-radius-pill: 999px;
  --tl-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 16px rgba(15, 23, 42, 0.04);
  --tl-shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 10px 24px -4px rgba(15, 23, 42, 0.08);
  --tl-shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --tl-max: 1180px;
  --tl-header-h: 68px;

  /* Type */
  --font: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --tl-header-bg: rgba(255, 255, 255, 0.86);
  --tl-hero-glow: rgba(37, 99, 235, 0.09);
  --tl-hero-glow-2: rgba(124, 58, 237, 0.05);
  --tl-hero-base: #ffffff;
  --tl-grid-line: rgba(148, 163, 184, 0.07);
  --tl-contribute-start: #eff6ff;
  --tl-contribute-end: #eef2ff;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  color: var(--tl-ink);
  background: var(--tl-bg);
  line-height: 1.55;
  font-size: 15.5px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
code, kbd, .mono { font-family: var(--font-mono); }

.container {
  width: min(100% - 2.5rem, var(--tl-max));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--tl-header-h);
  background: var(--tl-header-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--tl-border);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--tl-ink);
  flex-shrink: 0;
}

.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--tl-violet) 0%, var(--tl-blue) 100%);
  display: grid;
  place-items: center;
  color: white;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.28);
}

.logo-mark svg { width: 16px; height: 16px; }

.nav-main {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin-left: 0.5rem;
}

.nav-main a {
  padding: 0.45rem 0.75rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 550;
  color: var(--tl-muted);
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.nav-main a:hover,
.nav-main a.active {
  color: var(--tl-ink);
  background: var(--tl-bg-soft);
}

.header-search {
  flex: 1;
  max-width: 280px;
  margin-left: auto;
  position: relative;
}

.header-search input {
  width: 100%;
  height: 38px;
  padding: 0 2.6rem 0 2.2rem;
  border: 1px solid var(--tl-border);
  border-radius: var(--tl-radius-pill);
  background: var(--tl-bg);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.header-search input:focus {
  border-color: var(--tl-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
  background: var(--tl-surface);
}

.header-search .search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--tl-muted-2);
  pointer-events: none;
}

.header-search .kbd {
  position: absolute;
  right: 0.65rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--tl-muted-2);
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: 5px;
  padding: 0.1rem 0.35rem;
  font-family: var(--font);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-shrink: 0;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--tl-muted);
  padding: 0.3rem 0.65rem;
  border-radius: var(--tl-radius-pill);
  background: var(--tl-bg);
  border: 1px solid var(--tl-border);
  white-space: nowrap;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--tl-success);
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.18);
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--tl-muted);
  padding: 0.35rem 0.6rem;
  border-radius: 8px;
  border: 1px solid var(--tl-border);
  background: var(--tl-surface);
  transition: border-color 0.2s, color 0.2s;
}

.github-link:hover {
  color: var(--tl-ink);
  border-color: var(--tl-border-strong);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  height: 42px;
  padding: 0 1.15rem;
  border-radius: 10px;
  font-weight: 650;
  font-size: 0.925rem;
  letter-spacing: -0.01em;
  transition: transform 0.2s var(--ease), background 0.2s, box-shadow 0.2s, border-color 0.2s, color 0.2s;
  white-space: nowrap;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--tl-blue);
  color: white;
  box-shadow: 0 1px 2px rgba(37, 99, 235, 0.2), 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--tl-blue-dark);
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.25), 0 8px 20px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
  background: var(--tl-surface);
  color: var(--tl-blue);
  border: 1.5px solid var(--tl-blue-mid);
}

.btn-secondary:hover {
  background: var(--tl-blue-soft);
  border-color: var(--tl-blue);
}

.btn-ghost {
  background: transparent;
  color: var(--tl-muted);
  border: 1px solid var(--tl-border);
}

.btn-ghost:hover {
  color: var(--tl-ink);
  border-color: var(--tl-border-strong);
  background: var(--tl-surface);
}

.btn-lg {
  height: 48px;
  padding: 0 1.4rem;
  font-size: 0.975rem;
  border-radius: 12px;
}

.btn-sm {
  height: 34px;
  padding: 0 0.85rem;
  font-size: 0.825rem;
  border-radius: 8px;
}

.avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, #93c5fd, #6366f1);
  border: 2px solid var(--tl-surface);
  box-shadow: 0 0 0 1px var(--tl-border);
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: white;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--tl-border);
  background: var(--tl-surface);
  align-items: center;
  justify-content: center;
  color: var(--tl-ink);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  padding: 4.5rem 0 3.5rem;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, var(--tl-hero-glow), transparent 60%),
    radial-gradient(ellipse 40% 40% at 90% 20%, var(--tl-hero-glow-2), transparent 50%),
    linear-gradient(180deg, var(--tl-hero-base) 0%, var(--tl-bg) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--tl-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--tl-grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black, transparent);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--tl-radius-pill);
  background: var(--tl-blue-soft);
  color: var(--tl-blue-dark);
  font-size: 0.8rem;
  font-weight: 650;
  margin-bottom: 1.35rem;
  border: 1px solid var(--tl-blue-mid);
  animation: fadeUp 0.6s var(--ease) both;
}

.hero-badge .pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--tl-blue);
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
  font-size: clamp(2.15rem, 4.5vw, 3.35rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.12;
  color: var(--tl-ink);
  margin-bottom: 1.1rem;
  animation: fadeUp 0.6s 0.08s var(--ease) both;
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--tl-muted);
  max-width: 560px;
  margin: 0 auto 1.85rem;
  line-height: 1.65;
  animation: fadeUp 0.6s 0.14s var(--ease) both;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 2.5rem;
  animation: fadeUp 0.6s 0.2s var(--ease) both;
}

.framework-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.5rem 2rem;
  margin-bottom: 2.75rem;
  animation: fadeUp 0.6s 0.26s var(--ease) both;
}

.framework-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--tl-muted-2);
  transition: color 0.2s;
}

.framework-item:hover { color: var(--tl-muted); }

.framework-item svg {
  width: 18px;
  height: 18px;
  opacity: 0.7;
}

.code-window {
  text-align: left;
  background: var(--tl-code-bg);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--tl-shadow-lg), 0 0 0 1px rgba(255,255,255,0.06);
  max-width: 640px;
  margin: 0 auto;
  animation: fadeUp 0.7s 0.32s var(--ease) both;
}

.code-window-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.code-dots {
  display: flex;
  gap: 6px;
}

.code-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-dots span:nth-child(1) { background: #ff5f57; }
.code-dots span:nth-child(2) { background: #febc2e; }
.code-dots span:nth-child(3) { background: #28c840; }

.code-filename {
  margin-left: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #94a3b8;
}

.code-body {
  padding: 1.15rem 1.25rem 1.35rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: #cbd5e1;
  overflow-x: auto;
}

.code-body .c-kw { color: #c084fc; }
.code-body .c-fn { color: #60a5fa; }
.code-body .c-str { color: #86efac; }
.code-body .c-cm { color: #64748b; }
.code-body .c-num { color: #fbbf24; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== Sections ========== */
.section {
  padding: 4rem 0;
}

.section-alt {
  background: var(--tl-surface);
  border-block: 1px solid var(--tl-border);
}

.section-head {
  margin-bottom: 2rem;
}

.section-head.center {
  text-align: center;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2.5rem;
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--tl-blue);
  margin-bottom: 0.5rem;
}

.section-head h2 {
  font-size: clamp(1.55rem, 2.5vw, 1.95rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--tl-ink);
  margin-bottom: 0.5rem;
}

.section-head p {
  color: var(--tl-muted);
  font-size: 1rem;
}

.section-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
}

.section-head-row .section-head {
  margin-bottom: 0;
}

/* ========== Why cards ========== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.why-card {
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: var(--tl-radius);
  padding: 1.4rem 1.25rem;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s;
}

.why-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--tl-shadow-md);
  border-color: var(--tl-border-strong);
}

.why-icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--tl-blue-soft);
  color: var(--tl-blue);
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
}

.why-icon svg { width: 20px; height: 20px; }

.why-card h3 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.why-card p {
  font-size: 0.875rem;
  color: var(--tl-muted);
  line-height: 1.55;
  margin-bottom: 0.85rem;
}

.why-card .text-link {
  font-size: 0.825rem;
  font-weight: 650;
  color: var(--tl-blue);
}

.why-card .text-link:hover { text-decoration: underline; }

/* ========== Featured ========== */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.featured-card {
  position: relative;
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: var(--tl-radius);
  padding: 1.35rem 1.25rem 1.2rem;
  overflow: hidden;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
  display: flex;
  flex-direction: column;
  min-height: 190px;
}

.featured-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.featured-card.cat-forms::before { background: var(--cat-forms); }
.featured-card.cat-apps::before { background: var(--cat-apps); }
.featured-card.cat-ui::before { background: var(--cat-ui); }
.featured-card.cat-auto::before { background: var(--cat-auto); }

.featured-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--tl-shadow-md);
}

.featured-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.cat-tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.22rem 0.55rem;
  border-radius: 6px;
}

.cat-tag.forms { background: var(--cat-forms-bg); color: var(--cat-forms); }
.cat-tag.navigation { background: var(--cat-nav-bg); color: var(--cat-nav); }
.cat-tag.ui { background: var(--cat-ui-bg); color: var(--cat-ui); }
.cat-tag.automation { background: var(--cat-auto-bg); color: var(--cat-auto); }
.cat-tag.applications { background: var(--cat-apps-bg); color: var(--cat-apps); }
.cat-tag.advanced { background: var(--cat-adv-bg); color: var(--cat-adv); }
.cat-tag.dynamic { background: var(--cat-dynamic-bg); color: var(--cat-dynamic); }
.cat-tag.authentication { background: var(--cat-auth-bg); color: var(--cat-auth); }
.cat-tag.accessibility { background: var(--cat-a11y-bg); color: var(--cat-a11y); }
.cat-tag.responsive { background: var(--cat-responsive-bg); color: var(--cat-responsive); }
.cat-tag.advanced-automation { background: var(--cat-advauto-bg); color: var(--cat-advauto); }
.cat-tag.browser { background: var(--cat-browser-bg); color: var(--cat-browser); }
.cat-tag.interaction { background: var(--cat-interaction-bg); color: var(--cat-interaction); }
.cat-tag.validation { background: var(--cat-validation-bg); color: var(--cat-validation); }
.cat-tag.errors { background: var(--cat-errors-bg); color: var(--cat-errors); }

.diff-badge {
  font-size: 0.7rem;
  font-weight: 650;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  background: var(--tl-bg-soft);
  color: var(--tl-muted);
}

.diff-badge.beginner { color: var(--diff-beginner); background: var(--cat-apps-bg); }
.diff-badge.intermediate { color: var(--diff-intermediate); background: var(--cat-adv-bg); }
.diff-badge.advanced { color: var(--diff-advanced); background: var(--cat-auto-bg); }

.featured-card h3 {
  font-size: 1.05rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.featured-card p {
  font-size: 0.85rem;
  color: var(--tl-muted);
  flex: 1;
  margin-bottom: 1rem;
}

.featured-card .locator {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--tl-muted-2);
  background: var(--tl-bg);
  padding: 0.3rem 0.5rem;
  border-radius: 6px;
  margin-bottom: 0.85rem;
  border: 1px solid var(--tl-border);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.launch-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.875rem;
  font-weight: 650;
  color: var(--tl-blue);
}

.launch-link:hover { gap: 0.5rem; }
.launch-link svg { width: 14px; height: 14px; transition: transform 0.2s; }
.launch-link:hover svg { transform: translateX(2px); }

/* ========== Scenarios directory ========== */
.directory-controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.directory-search {
  position: relative;
}

.directory-search input {
  width: 100%;
  height: 48px;
  padding: 0 1rem 0 2.75rem;
  border: 1px solid var(--tl-border);
  border-radius: 12px;
  background: var(--tl-surface);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.directory-search input:focus {
  border-color: var(--tl-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.directory-search .search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--tl-muted-2);
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  max-width: 100%;
}

.filter-pill {
  height: 36px;
  padding: 0 0.95rem;
  border-radius: var(--tl-radius-pill);
  border: 1px solid var(--tl-border);
  background: var(--tl-surface);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--tl-muted);
  transition: all 0.2s var(--ease);
}

.filter-pill:hover {
  border-color: var(--tl-border-strong);
  color: var(--tl-ink);
}

.filter-pill.active {
  background: var(--tl-blue);
  border-color: var(--tl-blue);
  color: white;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.filter-pill .count {
  opacity: 0.7;
  font-weight: 500;
  margin-left: 0.15rem;
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.scenario-card {
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: var(--tl-radius);
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s;
  position: relative;
}

.scenario-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--tl-shadow-md);
  border-color: #bfdbfe;
}

.scenario-card.hidden { display: none; }

.scenario-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}

.scenario-icon-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.scenario-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.scenario-icon svg { width: 18px; height: 18px; }

.scenario-icon.forms { background: var(--cat-forms-bg); color: var(--cat-forms); }
.scenario-icon.navigation { background: var(--cat-nav-bg); color: var(--cat-nav); }
.scenario-icon.ui { background: var(--cat-ui-bg); color: var(--cat-ui); }
.scenario-icon.automation { background: var(--cat-auto-bg); color: var(--cat-auto); }
.scenario-icon.applications { background: var(--cat-apps-bg); color: var(--cat-apps); }
.scenario-icon.advanced { background: var(--cat-adv-bg); color: var(--cat-adv); }
.scenario-icon.dynamic { background: var(--cat-dynamic-bg); color: var(--cat-dynamic); }
.scenario-icon.authentication { background: var(--cat-auth-bg); color: var(--cat-auth); }
.scenario-icon.accessibility { background: var(--cat-a11y-bg); color: var(--cat-a11y); }
.scenario-icon.responsive { background: var(--cat-responsive-bg); color: var(--cat-responsive); }
.scenario-icon.advanced-automation { background: var(--cat-advauto-bg); color: var(--cat-advauto); }
.scenario-icon.browser { background: var(--cat-browser-bg); color: var(--cat-browser); }
.scenario-icon.interaction { background: var(--cat-interaction-bg); color: var(--cat-interaction); }
.scenario-icon.validation { background: var(--cat-validation-bg); color: var(--cat-validation); }
.scenario-icon.errors { background: var(--cat-errors-bg); color: var(--cat-errors); }

.scenario-card h3 {
  font-size: 1rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
}

.scenario-card p {
  font-size: 0.825rem;
  color: var(--tl-muted);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 1rem;
}

.scenario-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--tl-border);
}

.scenario-id {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--tl-muted-2);
}

.open-test {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.825rem;
  font-weight: 650;
  color: var(--tl-blue);
}

.open-test svg { width: 13px; height: 13px; }
.scenario-card:hover .open-test { text-decoration: underline; }

.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 1rem;
  color: var(--tl-muted);
  display: none;
}

.no-results.visible { display: block; }

/* ========== Contribute ========== */
.contribute-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.25rem;
  align-items: stretch;
}

.contribute-code {
  background: var(--tl-code-bg);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--tl-shadow-md);
}

.code-tabs {
  display: flex;
  gap: 0;
  padding: 0.65rem 0.65rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.02);
}

.code-tab {
  padding: 0.55rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: #94a3b8;
  border-radius: 8px 8px 0 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.code-tab.active {
  color: white;
  background: rgba(255,255,255,0.05);
  border-bottom-color: var(--tl-blue);
}

.contribute-code .code-body {
  min-height: 200px;
}

.contribute-card {
  background: linear-gradient(160deg, var(--tl-contribute-start) 0%, var(--tl-contribute-end) 100%);
  border: 1px solid var(--tl-blue-mid);
  border-radius: 16px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contribute-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
}

.contribute-card p {
  color: var(--tl-muted);
  font-size: 0.925rem;
  margin-bottom: 1.35rem;
  line-height: 1.6;
}

.contribute-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* ========== Footer ========== */
.site-footer {
  background: #0b1220;
  color: #94a3b8;
  padding-top: 3.5rem;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 2rem;
  padding-bottom: 2.5rem;
}

.footer-brand .logo {
  color: white;
  margin-bottom: 0.85rem;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.6;
  max-width: 260px;
}

.footer-col h4 {
  color: white;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  font-size: 0.875rem;
  padding: 0.3rem 0;
  color: #94a3b8;
  transition: color 0.2s;
}

.footer-col a:hover { color: white; }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.15rem 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.8rem;
}

.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: #86efac;
  font-weight: 550;
}

.footer-status .status-dot {
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
}

/* ========== Testing page layout ========== */
.test-page-header {
  background: var(--tl-surface);
  border-bottom: 1px solid var(--tl-border);
  padding: 1.25rem 0 1.5rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.825rem;
  color: var(--tl-muted);
  margin-bottom: 1rem;
}

.breadcrumb a:hover { color: var(--tl-blue); }
.breadcrumb .sep { color: var(--tl-muted-2); }
.breadcrumb .current { color: var(--tl-ink); font-weight: 600; }

.test-page-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.test-page-title-row h1 {
  font-size: clamp(1.5rem, 2.5vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.35rem;
}

.test-page-title-row .desc {
  color: var(--tl-muted);
  max-width: 560px;
  font-size: 0.95rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--tl-muted);
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  border: 1px solid var(--tl-border);
  background: var(--tl-surface);
  transition: color 0.2s, border-color 0.2s;
}

.back-link:hover {
  color: var(--tl-ink);
  border-color: var(--tl-border-strong);
}

.test-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1.5rem;
  padding: 1.75rem 0 3.5rem;
  align-items: start;
}

.test-area {
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: var(--tl-radius);
  box-shadow: var(--tl-shadow);
  overflow: hidden;
}

.test-area-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1.15rem;
  background: var(--tl-bg);
  border-bottom: 1px solid var(--tl-border);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--tl-muted);
}

.test-area-bar .mono {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--tl-muted-2);
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  padding: 0.2rem 0.45rem;
  border-radius: 5px;
}

.test-area-body {
  padding: 1.75rem;
}

.instructions-panel {
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: var(--tl-radius);
  overflow: hidden;
  position: sticky;
  top: calc(var(--tl-header-h) + 1rem);
}

.instructions-panel h2 {
  font-size: 0.9rem;
  font-weight: 750;
  padding: 0.95rem 1.1rem;
  border-bottom: 1px solid var(--tl-border);
  background: var(--tl-bg);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.instructions-body {
  padding: 1.1rem;
}

.cred-box {
  background: var(--tl-blue-soft);
  border: 1px solid var(--tl-blue-mid);
  border-radius: 10px;
  padding: 0.85rem;
  margin-bottom: 1.15rem;
  font-size: 0.825rem;
}

.cred-box h3 {
  font-size: 0.75rem;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--tl-blue-dark);
  margin-bottom: 0.5rem;
}

.cred-row {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.25rem 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.cred-row span:first-child { color: var(--tl-muted); }
.cred-row span:last-child { font-weight: 600; color: var(--tl-ink); }

.case-group {
  margin-bottom: 1.1rem;
}

.case-group h3 {
  font-size: 0.8rem;
  font-weight: 750;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.case-group.positive h3 { color: var(--tl-success); }
.case-group.negative h3 { color: var(--tl-error); }

.case-group ul {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.case-group li {
  font-size: 0.8rem;
  color: var(--tl-muted);
  padding-left: 0.9rem;
  position: relative;
  line-height: 1.45;
}

.case-group li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--tl-border-strong);
}

.case-group.positive li::before { background: var(--tl-success); }
.case-group.negative li::before { background: var(--tl-error); }

/* ========== Forms / Login ========== */
.form-stack {
  max-width: 400px;
  margin: 0 auto;
}

.form-stack.wide { max-width: 520px; }

.app-brand {
  text-align: center;
  margin-bottom: 1.75rem;
}

.app-brand .mini-logo {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--tl-violet), var(--tl-blue));
  display: grid;
  place-items: center;
  margin: 0 auto 0.85rem;
  color: white;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
}

.app-brand h2 {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.app-brand p {
  font-size: 0.875rem;
  color: var(--tl-muted);
}

.field {
  margin-bottom: 1.1rem;
}

.field label {
  display: block;
  font-size: 0.825rem;
  font-weight: 650;
  margin-bottom: 0.4rem;
  color: var(--tl-ink-2);
}

.field-hint {
  font-size: 0.75rem;
  color: var(--tl-muted-2);
  margin-top: 0.35rem;
}

.input,
.select,
.textarea {
  width: 100%;
  height: 44px;
  padding: 0 0.9rem;
  border: 1.5px solid var(--tl-border);
  border-radius: 10px;
  background: var(--tl-surface);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.textarea {
  height: auto;
  min-height: 100px;
  padding: 0.75rem 0.9rem;
  resize: vertical;
}

.input:focus,
.select:focus,
.textarea:focus {
  border-color: var(--tl-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.input.error,
.select.error,
.textarea.error {
  border-color: var(--tl-error);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.password-wrap {
  position: relative;
}

.password-wrap .input {
  padding-right: 2.75rem;
}

.toggle-password {
  position: absolute;
  right: 0.55rem;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: var(--tl-muted);
}

.toggle-password:hover {
  background: var(--tl-bg);
  color: var(--tl-ink);
}

.checkbox-row,
.radio-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--tl-muted);
  margin-bottom: 0.5rem;
}

.checkbox-row input,
.radio-row input {
  width: 16px;
  height: 16px;
  accent-color: var(--tl-blue);
}

.alert {
  display: none;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 550;
  margin-bottom: 1.1rem;
  align-items: flex-start;
  gap: 0.55rem;
}

.alert.visible { display: flex; }

.alert-error {
  background: var(--tl-error-bg);
  color: var(--tl-error);
  border: 1px solid #fecaca;
}

.alert-success {
  background: var(--tl-success-bg);
  color: var(--tl-success);
  border: 1px solid #a7f3d0;
}

.alert svg { flex-shrink: 0; margin-top: 1px; }

.form-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.form-actions .btn { width: 100%; }

.form-footer-links {
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--tl-muted);
}

.form-footer-links a {
  color: var(--tl-blue);
  font-weight: 600;
}

.form-footer-links a:hover { text-decoration: underline; }

/* Success state */
.success-state {
  display: none;
  text-align: center;
  padding: 2rem 1rem;
  max-width: 420px;
  margin: 0 auto;
}

.success-state.visible { display: block; }

.success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--tl-success-bg);
  color: var(--tl-success);
  display: grid;
  place-items: center;
  margin: 0 auto 1.15rem;
  animation: popIn 0.4s var(--ease);
}

@keyframes popIn {
  from { transform: scale(0.6); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.success-state h2 {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
}

.success-state p {
  color: var(--tl-muted);
  margin-bottom: 1.5rem;
}

.login-form-wrap.hidden { display: none; }

/* ========== Generic test widgets ========== */
.widget-grid {
  display: grid;
  gap: 1.25rem;
}

.widget {
  border: 1px solid var(--tl-border);
  border-radius: 12px;
  padding: 1.15rem;
  background: var(--tl-bg);
}

.widget h3 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  padding: 0.35rem 0.75rem;
  border-radius: var(--tl-radius-pill);
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--tl-muted);
}

.chip.active {
  background: var(--tl-blue-soft);
  border-color: var(--tl-blue-mid);
  color: var(--tl-blue-dark);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--tl-border);
}

.data-table th {
  background: var(--tl-bg);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--tl-muted);
  cursor: pointer;
  user-select: none;
}

.data-table th:hover { color: var(--tl-ink); }
.data-table tr:hover td { background: var(--tl-blue-soft); }

.toast-stack {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: var(--tl-ink);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 550;
  box-shadow: var(--tl-shadow-lg);
  animation: fadeUp 0.3s var(--ease);
  min-width: 240px;
}

.toast.success { background: var(--tl-success); }
.toast.error { background: var(--tl-error); }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 150;
  padding: 1rem;
}

.modal-overlay.visible { display: flex; }

.modal {
  background: var(--tl-surface);
  border-radius: 16px;
  padding: 1.5rem;
  width: min(100%, 420px);
  box-shadow: var(--tl-shadow-lg);
  animation: fadeUp 0.3s var(--ease);
}

.modal h3 {
  font-size: 1.1rem;
  font-weight: 750;
  margin-bottom: 0.5rem;
}

.modal p {
  color: var(--tl-muted);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
}

.product-card {
  border: 1px solid var(--tl-border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--tl-surface);
  transition: box-shadow 0.2s, transform 0.2s;
}

.product-card:hover {
  box-shadow: var(--tl-shadow-md);
  transform: translateY(-2px);
}

.product-img {
  height: 110px;
  background: linear-gradient(135deg, var(--tl-bg-soft), var(--tl-blue-mid));
  display: grid;
  place-items: center;
  font-size: 2rem;
}

.product-info {
  padding: 0.85rem;
}

.product-info h4 {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.product-info .price {
  font-weight: 750;
  color: var(--tl-blue);
  margin-bottom: 0.65rem;
}

.drop-zone {
  border: 2px dashed var(--tl-border-strong);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
  background: var(--tl-bg);
  transition: border-color 0.2s, background 0.2s;
}

.drop-zone.dragover {
  border-color: var(--tl-blue);
  background: var(--tl-blue-soft);
}

.drop-zone p {
  color: var(--tl-muted);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

.draggable-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.drag-item {
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  cursor: grab;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 600;
  font-size: 0.875rem;
  user-select: none;
}

.drag-item:active { cursor: grabbing; }
.drag-item.dragging { opacity: 0.5; }

.loading-demo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--tl-surface);
  border-radius: 10px;
  border: 1px solid var(--tl-border);
}

.spinner {
  width: 22px;
  height: 22px;
  border: 2.5px solid var(--tl-border);
  border-top-color: var(--tl-blue);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.iframe-demo {
  width: 100%;
  height: 220px;
  border: 1px solid var(--tl-border);
  border-radius: 10px;
  background: var(--tl-surface);
}

.api-panel {
  display: grid;
  gap: 1rem;
}

.api-response {
  background: var(--tl-code-bg);
  color: #cbd5e1;
  border-radius: 10px;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.6;
  min-height: 120px;
  white-space: pre-wrap;
  overflow: auto;
}

.broken-link-list a {
  display: block;
  padding: 0.55rem 0;
  color: var(--tl-blue);
  font-weight: 550;
  font-size: 0.9rem;
}

.broken-link-list a:hover { text-decoration: underline; }

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  margin-top: 1rem;
}

.page-btn {
  min-width: 34px;
  height: 34px;
  padding: 0 0.55rem;
  border-radius: 8px;
  border: 1px solid var(--tl-border);
  background: var(--tl-surface);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--tl-muted);
}

.page-btn.active,
.page-btn:hover {
  background: var(--tl-blue);
  border-color: var(--tl-blue);
  color: white;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--tl-blue);
}

/* Compact header for test pages */
.site-header.compact .header-search,
.site-header.compact .status-pill,
.site-header.compact .avatar {
  display: none;
}

/* ========== Responsive ========== */
@media (max-width: 1100px) {
  .why-grid,
  .featured-grid,
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
  }

  .header-search { display: none; }
}

@media (max-width: 860px) {
  .nav-main,
  .status-pill,
  .github-link,
  .avatar {
    display: none;
  }

  .menu-toggle { display: inline-flex; }

  .header-actions .btn-primary.header-cta {
    display: none;
  }

  .contribute-grid,
  .test-layout {
    grid-template-columns: 1fr;
  }

  .instructions-panel {
    position: static;
  }

  .mobile-nav {
    display: none;
    position: absolute;
    top: var(--tl-header-h);
    left: 0;
    right: 0;
    background: var(--tl-surface);
    border-bottom: 1px solid var(--tl-border);
    padding: 1rem;
    flex-direction: column;
    gap: 0.25rem;
    box-shadow: var(--tl-shadow-md);
  }

  .mobile-nav.open { display: flex; }

  .mobile-nav a {
    padding: 0.75rem 0.85rem;
    border-radius: 8px;
    font-weight: 600;
    color: var(--tl-ink);
  }

  .mobile-nav a:hover { background: var(--tl-bg); }
}

@media (max-width: 600px) {
  .container { width: min(100% - 1.5rem, var(--tl-max)); }

  .why-grid,
  .featured-grid,
  .scenarios-grid,
  .footer-main {
    grid-template-columns: 1fr;
  }

  .hero { padding: 3rem 0 2.5rem; }

  .hero-ctas { flex-direction: column; align-items: stretch; }
  .hero-ctas .btn { width: 100%; }

  .section { padding: 3rem 0; }

  .test-area-body { padding: 1.15rem; }

  .framework-row { gap: 1rem 1.25rem; }
}

@media (min-width: 861px) {
  .mobile-nav { display: none !important; }
}

/* ========== Scenarios 17–32 extras ========== */
.otp-row {
  display: flex;
  gap: 0.55rem;
  justify-content: center;
  margin: 1rem 0;
}
.otp-row .input {
  width: 48px;
  height: 52px;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 700;
  padding: 0;
}
.skeleton {
  background: linear-gradient(90deg, var(--tl-bg-soft) 25%, var(--tl-border) 50%, var(--tl-bg-soft) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s ease infinite;
  border-radius: 8px;
  height: 14px;
  margin-bottom: 0.65rem;
}
.skeleton.title { height: 22px; width: 60%; }
.skeleton.thumb { height: 88px; width: 100%; margin-bottom: 0.85rem; }
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.progress-track {
  height: 8px;
  background: var(--tl-bg-soft);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--tl-border);
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--tl-blue);
  transition: width 0.2s linear;
}
.dual-range {
  position: relative;
  height: 36px;
  margin: 0.5rem 0 1rem;
}
.dual-range input[type="range"] {
  position: absolute;
  left: 0;
  width: 100%;
  pointer-events: none;
  appearance: none;
  background: transparent;
  height: 36px;
}
.dual-range input[type="range"]::-webkit-slider-thumb {
  pointer-events: auto;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--tl-blue);
  cursor: pointer;
  border: 2px solid white;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.dual-range input[type="range"]::-moz-range-thumb {
  pointer-events: auto;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--tl-blue);
  cursor: pointer;
  border: 2px solid white;
}
.dual-range-track {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 6px;
  transform: translateY(-50%);
  background: var(--tl-border);
  border-radius: 999px;
}
.hover-menu {
  position: relative;
  display: inline-block;
}
.hover-menu-panel {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 180px;
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: 10px;
  box-shadow: var(--tl-shadow-md);
  padding: 0.35rem;
  z-index: 20;
}
.hover-menu:hover > .hover-menu-panel,
.hover-menu:focus-within > .hover-menu-panel {
  display: block;
}
.hover-menu-panel a,
.hover-menu-panel button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  font-size: 0.875rem;
  color: var(--tl-ink);
  background: transparent;
  border: none;
}
.hover-menu-panel a:hover,
.hover-menu-panel button:hover {
  background: var(--tl-bg-soft);
}
.nested-hover { position: relative; }
.nested-hover > .hover-menu-panel {
  top: 0;
  left: calc(100% + 4px);
}
.tooltip-wrap { position: relative; display: inline-block; }
.tooltip-bubble {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 8px);
  transform: translateX(-50%);
  background: var(--tl-ink);
  color: var(--tl-surface);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
  z-index: 30;
}
.tooltip-wrap:hover .tooltip-bubble,
.tooltip-wrap:focus-within .tooltip-bubble,
.tooltip-wrap.show-delayed .tooltip-bubble {
  opacity: 1;
}
.suggest-box { position: relative; }
.suggest-list {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 4px);
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: 10px;
  box-shadow: var(--tl-shadow-md);
  z-index: 40;
  max-height: 240px;
  overflow: auto;
  display: none;
}
.suggest-list.visible { display: block; }
.suggest-item {
  padding: 0.65rem 0.85rem;
  font-size: 0.875rem;
  cursor: pointer;
}
.suggest-item:hover,
.suggest-item.active {
  background: var(--tl-blue-soft);
}
.suggest-item mark {
  background: transparent;
  color: var(--tl-blue);
  font-weight: 700;
}
.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.65rem;
}
.editor-toolbar button {
  height: 32px;
  min-width: 32px;
  padding: 0 0.55rem;
  border: 1px solid var(--tl-border);
  border-radius: 8px;
  background: var(--tl-surface);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--tl-ink);
}
.editor-toolbar button:hover { background: var(--tl-bg-soft); }
.rich-editor {
  min-height: 160px;
  border: 1.5px solid var(--tl-border);
  border-radius: 10px;
  padding: 0.85rem;
  outline: none;
  background: var(--tl-surface);
}
.rich-editor:focus {
  border-color: var(--tl-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.calendar {
  width: 100%;
  max-width: 320px;
  border: 1px solid var(--tl-border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--tl-surface);
}
.calendar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem;
  background: var(--tl-bg);
  border-bottom: 1px solid var(--tl-border);
  font-weight: 700;
}
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  padding: 0.65rem;
}
.calendar-grid .dow {
  text-align: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--tl-muted);
  padding: 0.35rem 0;
}
.calendar-day {
  aspect-ratio: 1;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--tl-ink);
  cursor: pointer;
}
.calendar-day:hover:not(:disabled) { background: var(--tl-blue-soft); }
.calendar-day.today { box-shadow: inset 0 0 0 1.5px var(--tl-blue); }
.calendar-day.selected { background: var(--tl-blue); color: white; }
.calendar-day:disabled { color: var(--tl-muted-2); opacity: 0.45; cursor: not-allowed; }
.stepper {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.step-pill {
  flex: 1;
  min-width: 90px;
  text-align: center;
  padding: 0.55rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--tl-border);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--tl-muted);
  background: var(--tl-bg);
}
.step-pill.active {
  background: var(--tl-blue);
  border-color: var(--tl-blue);
  color: white;
}
.step-pill.done {
  background: var(--tl-success-bg);
  border-color: #a7f3d0;
  color: var(--tl-success);
}
.session-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: var(--tl-blue-soft);
  border: 1px solid var(--tl-blue-mid);
  margin-bottom: 1rem;
  font-size: 0.85rem;
}
.resp-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--tl-border);
  border-radius: 12px;
  background: var(--tl-bg);
  margin-bottom: 1rem;
}
.resp-links { display: flex; gap: 1rem; font-size: 0.875rem; font-weight: 600; }
.resp-burger { display: none; }
.resp-demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}
.resp-card {
  border: 1px solid var(--tl-border);
  border-radius: 12px;
  padding: 1rem;
  background: var(--tl-surface);
}
.resp-table-wrap { overflow-x: auto; }
@media (max-width: 900px) {
  .resp-demo-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .resp-links { display: none; }
  .resp-burger { display: inline-flex; }
  .resp-demo-grid { grid-template-columns: 1fr; }
  .resp-table thead { display: none; }
  .resp-table tr {
    display: block;
    margin-bottom: 0.75rem;
    border: 1px solid var(--tl-border);
    border-radius: 10px;
    padding: 0.5rem;
  }
  .resp-table td {
    display: flex;
    justify-content: space-between;
    border: none;
    padding: 0.4rem 0.25rem;
  }
  .resp-table td::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--tl-muted);
  }
}
.a11y-bad-contrast {
  background: #dddddd;
  color: #bbbbbb;
  padding: 0.75rem;
  border-radius: 8px;
}
.focus-ring:focus-visible {
  outline: 3px solid var(--tl-blue);
  outline-offset: 2px;
}
.infinite-feed {
  max-height: 360px;
  overflow: auto;
  border: 1px solid var(--tl-border);
  border-radius: 12px;
  padding: 0.75rem;
  background: var(--tl-bg);
}
.feed-item {
  padding: 0.85rem;
  border: 1px solid var(--tl-border);
  border-radius: 10px;
  background: var(--tl-surface);
  margin-bottom: 0.65rem;
  font-size: 0.875rem;
}
.toast-persist {
  position: relative;
  margin-top: 0.75rem;
}

/* Alerts practice page */
.alert-grid {
  display: grid;
  gap: 0.85rem;
}
.alert-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.95rem 1.05rem;
  border: 1px solid var(--tl-border);
  border-radius: 12px;
  background: var(--tl-bg);
}
.alert-row h3 {
  font-size: 0.95rem;
  font-weight: 750;
  margin-bottom: 0.2rem;
}
.alert-row p {
  font-size: 0.8rem;
  color: var(--tl-muted);
  max-width: 420px;
}
.alert-result-box {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--tl-border);
  background: var(--tl-surface);
  font-size: 0.9rem;
  min-height: 48px;
}
.alert-result-box:empty::before {
  content: 'Results from confirm / prompt / notifications appear here.';
  color: var(--tl-muted-2);
}
.countdown-bar {
  display: none;
  align-items: center;
  gap: 0.65rem;
  margin-top: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: var(--tl-blue-soft);
  border: 1px solid var(--tl-blue-mid);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--tl-blue-dark);
}
.countdown-bar.visible { display: flex; }
.dom-alert {
  display: none;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  margin-top: 0.65rem;
  font-size: 0.9rem;
  font-weight: 550;
}
.dom-alert.visible { display: flex; }
.dom-alert.success { background: var(--tl-success-bg); color: var(--tl-success); border: 1px solid #a7f3d0; }
.dom-alert.error { background: var(--tl-error-bg); color: var(--tl-error); border: 1px solid #fecaca; }
.dom-alert.warning { background: var(--tl-warn-bg); color: var(--tl-warn); border: 1px solid #fde68a; }
.dom-alert.info { background: var(--tl-blue-soft); color: var(--tl-blue-dark); border: 1px solid var(--tl-blue-mid); }
.dom-alert .dismiss {
  margin-left: auto;
  background: transparent;
  border: none;
  color: inherit;
  font-weight: 700;
  cursor: pointer;
  padding: 0 0.25rem;
}
.auto-notes {
  margin-top: 1.25rem;
  border: 1px solid var(--tl-border);
  border-radius: 12px;
  background: var(--tl-surface);
  overflow: hidden;
}
.auto-notes summary {
  cursor: pointer;
  padding: 0.9rem 1.1rem;
  font-weight: 750;
  font-size: 0.9rem;
  list-style: none;
  background: var(--tl-bg);
}
.auto-notes summary::-webkit-details-marker { display: none; }
.auto-notes summary::after {
  content: '+';
  float: right;
  color: var(--tl-muted);
}
.auto-notes[open] summary::after { content: '−'; }
.auto-notes-body {
  padding: 1rem 1.1rem 1.2rem;
  border-top: 1px solid var(--tl-border);
  font-size: 0.85rem;
  color: var(--tl-muted);
}
.auto-notes-body pre {
  margin-top: 0.75rem;
  background: var(--tl-code-bg);
  color: #cbd5e1;
  border-radius: 10px;
  padding: 0.85rem 1rem;
  overflow: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.6;
}
.ideas-list {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.5rem;
}
.ideas-list li {
  font-size: 0.825rem;
  color: var(--tl-muted);
  padding-left: 0.9rem;
  position: relative;
}
.ideas-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--tl-blue);
}

/* Realistic Applications */
.apps-launch-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  max-width: 720px;
}
.app-launch-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: start;
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: var(--tl-radius);
  padding: 1.5rem;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.app-launch-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--tl-shadow-md);
}
.app-launch-visual {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #0b1f3a, #1a73e8);
  color: white;
}
.app-launch-body h3 {
  font-size: 1.25rem;
  margin: 0.45rem 0 0.35rem;
}
.app-launch-body p {
  color: var(--tl-muted);
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
}
@media (max-width: 640px) {
  .app-launch-card { grid-template-columns: 1fr; }
}