/* ============================================
   TechReady Series — Shared Styles
   Dark professional theme for tech literacy
   ============================================ */

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

:root {
  /* Deep purple backgrounds */
  --bg-primary: #0e0a18;
  --bg-secondary: #150f24;
  --bg-card: #1d1530;
  --bg-card-hover: #271d3e;
  --bg-accent: #201638;
  /* High-contrast text */
  --text-primary: #f0ecf6;
  --text-secondary: #b8aece;
  --text-muted: #8477a0;
  /* All five palette colors in active roles */
  --accent-lavender: #AF98E6;   /* Primary: links, buttons, badges */
  --accent-orchid: #DA99E6;     /* Secondary: hover, gradients, section markers */
  --accent-gold: #E5DD97;       /* Success: completion, progress, try-it */
  --accent-rose: #DD92C5;       /* Emphasis: callouts, quotes, AI borders */
  --accent-periwinkle: #9CA6E3; /* Subtle: code, tabs, nav, explorer */
  /* Legacy aliases (so existing var() refs don't break) */
  --accent-blue: #9CA6E3;
  --accent-blue-dim: #7B87C8;
  --accent-green: #E5DD97;
  --accent-yellow: #E5DD97;
  --accent-red: #ef6b6b;
  --accent-purple: #AF98E6;
  --accent-orange: #DA99E6;
  --accent-pink: #DD92C5;
  /* Purple-tinted borders */
  --border-subtle: #2d2248;
  --border-card: #3a2d55;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-card: 0 2px 12px rgba(14,10,24,0.5);
  --shadow-lg: 0 8px 32px rgba(14,10,24,0.6);
  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 920px;
  --transition: 0.25s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ---- Top Navigation ---- */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(14, 10, 24, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.6rem 1.5rem;
}
.top-nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}
.nav-brand img {
  height: 28px;
  border-radius: 4px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text-primary);
  background: var(--bg-card);
}
.nav-links a.active {
  color: var(--accent-orchid);
  background: rgba(218,153,230,0.1);
}

/* ---- Page Container ---- */
.page-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ---- Module Header ---- */
.module-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-orchid);
  background: rgba(218,153,230,0.1);
  border: 1px solid rgba(218,153,230,0.2);
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}
.module-header h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 400;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}
.module-header h1 em {
  color: var(--accent-lavender);
  font-style: italic;
}
.module-header .subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.6;
  max-width: 680px;
}

/* ---- Section Headings ---- */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-orchid);
  margin-bottom: 0.4rem;
}
h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 400;
  margin-bottom: 1rem;
}
h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

/* ---- Cards ---- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  transition: var(--transition);
}
.card:hover {
  border-color: rgba(175,152,230,0.3);
  background: var(--bg-card-hover);
}

/* ---- AI Callout ---- */
.ai-callout {
  background: linear-gradient(135deg, rgba(221,146,197,0.08), rgba(175,152,230,0.06));
  border: 1px solid rgba(221,146,197,0.2);
  border-left: 3px solid var(--accent-rose);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
}
.ai-callout-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-rose);
  margin-bottom: 0.5rem;
}
.ai-callout p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
}

/* ---- Try It Yourself ---- */
.try-it {
  background: linear-gradient(135deg, rgba(229,221,151,0.07), rgba(229,221,151,0.02));
  border: 1px solid rgba(229,221,151,0.2);
  border-left: 3px solid var(--accent-gold);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
}
.try-it-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-gold);
  margin-bottom: 0.5rem;
}
.try-it p, .try-it ol, .try-it ul {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
}
.try-it ol, .try-it ul {
  padding-left: 1.25rem;
  margin-top: 0.5rem;
}
.try-it li {
  margin-bottom: 0.3rem;
}

/* ---- Quiz Section ---- */
.quiz-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin: 3rem 0 2rem;
}
.quiz-section h2 {
  text-align: center;
  margin-bottom: 0.3rem;
}
.quiz-intro {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 1.5rem;
}
.quiz-question {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.quiz-question p.q-text {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}
.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.quiz-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  transition: var(--transition);
  font-size: 0.9rem;
  color: var(--text-secondary);
  background: transparent;
  text-align: left;
  width: 100%;
}
.quiz-option:hover {
  border-color: var(--accent-lavender);
  color: var(--text-primary);
  background: rgba(175,152,230,0.06);
}
.quiz-option.correct {
  border-color: var(--accent-gold);
  background: rgba(229,221,151,0.1);
  color: var(--accent-gold);
}
.quiz-option.incorrect {
  border-color: var(--accent-red);
  background: rgba(239,107,107,0.1);
  color: var(--accent-red);
}
.quiz-option .marker {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: var(--transition);
}
.quiz-option.correct .marker {
  border-color: var(--accent-gold);
  background: var(--accent-gold);
  color: var(--bg-primary);
}
.quiz-option.incorrect .marker {
  border-color: var(--accent-red);
  background: var(--accent-red);
  color: var(--bg-primary);
}
.quiz-feedback {
  font-size: 0.85rem;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  margin-top: 0.5rem;
  display: none;
  line-height: 1.5;
}
.quiz-feedback.show { display: block; }
.quiz-feedback.correct-fb {
  background: rgba(229,221,151,0.08);
  color: var(--accent-gold);
  border: 1px solid rgba(229,221,151,0.15);
}
.quiz-feedback.incorrect-fb {
  background: rgba(239,107,107,0.08);
  color: var(--accent-red);
  border: 1px solid rgba(239,107,107,0.15);
}
.quiz-score {
  text-align: center;
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  display: none;
}
.quiz-score.show { display: block; }
.quiz-score .score-num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent-lavender);
}
.quiz-score p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

/* ---- Module Nav (bottom prev/next) ---- */
.module-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
}
.module-nav a {
  display: block;
  text-decoration: none;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.module-nav a:hover {
  border-color: var(--accent-lavender);
  background: var(--bg-card-hover);
}
.module-nav a .nav-dir {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}
.module-nav a .nav-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}
.module-nav a.next { text-align: right; }
.module-nav a.prev { grid-column: 1; }
.module-nav a.next { grid-column: 2; }
.module-nav a:only-child.next { grid-column: 2; }

/* ---- Progress Bar ---- */
.progress-strip {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.4rem 1.5rem;
}
.progress-strip-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.progress-bar-bg {
  flex: 1;
  height: 4px;
  background: var(--border-subtle);
  border-radius: 2px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-orchid), var(--accent-lavender));
  border-radius: 2px;
  transition: width 0.4s ease;
}
.progress-text {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  white-space: nowrap;
}

/* ---- Content Sections ---- */
.content-section {
  margin: 2.5rem 0;
}
.content-section p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  line-height: 1.7;
}
.content-section strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ---- Analogy Box ---- */
.analogy-box {
  background: var(--bg-accent);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}
.analogy-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-yellow);
  margin-bottom: 0.4rem;
}
.analogy-box p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* ---- Two Column Grid ---- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}
@media (max-width: 640px) {
  .two-col { grid-template-columns: 1fr; }
}

/* ---- Comparison Table ---- */
.comp-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.88rem;
}
.comp-table th, .comp-table td {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border-subtle);
  text-align: left;
}
.comp-table th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.comp-table td {
  color: var(--text-secondary);
}
.comp-table tr:hover td {
  background: rgba(221,146,197,0.04);
}

/* ---- Tabs ---- */
.tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.tab-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.tab-btn:hover { border-color: var(--accent-periwinkle); color: var(--text-primary); }
.tab-btn.active {
  background: rgba(156,166,227,0.1);
  border-color: var(--accent-periwinkle);
  color: var(--accent-periwinkle);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---- Clickable Grid Items ---- */
.icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0;
}
.icon-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1rem 0.8rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}
.icon-item:hover {
  border-color: var(--accent-orchid);
  transform: translateY(-2px);
}
.icon-item .icon-emoji {
  font-size: 1.6rem;
  margin-bottom: 0.4rem;
}
.icon-item .icon-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
}
.icon-item .icon-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* ---- Scenario Cards ---- */
.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.scenario-card .scenario-header {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}
.scenario-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}
.scenario-card .answer {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
}

/* ---- Checklist ---- */
.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
}
.checklist-item:last-child { border-bottom: none; }
.checklist-box {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-card);
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.checklist-item.checked .checklist-box {
  background: var(--accent-gold);
  border-color: var(--accent-gold);
}
.checklist-item.checked .checklist-box::after {
  content: '✓';
  color: var(--bg-primary);
  font-size: 0.7rem;
  font-weight: 700;
}
.checklist-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ---- Home Page Specifics ---- */
.hero {
  text-align: center;
  padding: 3rem 0;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  line-height: 1.2;
  margin-bottom: 1rem;
}
.hero h1 em {
  color: var(--accent-lavender);
  font-style: italic;
}
.hero .hero-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 640px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}
.hero-cta {
  display: inline-block;
  background: var(--accent-lavender);
  color: var(--bg-primary);
  padding: 0.75rem 2rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
}
.hero-cta:hover {
  background: var(--accent-orchid);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(218,153,230,0.3);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin: 2rem 0;
}
@media (max-width: 600px) {
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
}
.stat-card .stat-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--accent-lavender);
}
.stat-card .stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.module-card-link {
  display: block;
  text-decoration: none;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 0.75rem;
  transition: var(--transition);
}
.module-card-link:hover {
  border-color: var(--accent-lavender);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}
.module-card-link .mod-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}
.module-card-link .mod-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  margin: 0.25rem 0 0.4rem;
}
.module-card-link .mod-desc {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.55;
}
.module-card-link .mod-tags {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.6rem;
  flex-wrap: wrap;
}
.module-card-link .mod-tag {
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  background: var(--bg-accent);
  border-radius: 100px;
  color: var(--text-muted);
}
.module-card-link .mod-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}
.module-card-link .mod-status.complete {
  color: var(--accent-gold);
}

/* ---- Who This Is For ---- */
.audience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}
@media (max-width: 600px) {
  .audience-grid { grid-template-columns: 1fr; }
}
.audience-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}
.audience-card .aud-icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}
.audience-card h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.audience-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ---- Footer ---- */
.site-footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.78rem;
  border-top: 1px solid var(--border-subtle);
  margin-top: 3rem;
}

/* ---- Password Tester ---- */
.pw-input {
  width: 100%;
  padding: 0.7rem 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}
.pw-input:focus { border-color: var(--accent-orchid); }
.pw-strength-bar {
  height: 4px;
  border-radius: 2px;
  margin-top: 0.5rem;
  background: var(--border-subtle);
  overflow: hidden;
}
.pw-strength-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.3s ease, background 0.3s ease;
}

/* ---- Phishing Example Visual ---- */
.phishing-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}
@media (max-width: 640px) {
  .phishing-comparison { grid-template-columns: 1fr; }
}
.fake-email {
  background: #1e2233;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-card);
}
.fake-email-header {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.78rem;
}
.fake-email-header .from-line { color: var(--text-secondary); margin-bottom: 0.2rem; }
.fake-email-header .subject-line { color: var(--text-primary); font-weight: 600; }
.fake-email-body {
  padding: 0.8rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.55;
}
.fake-email-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.8rem;
}
.fake-email-label.legit { background: rgba(229,221,151,0.15); color: var(--accent-gold); }
.fake-email-label.phish { background: rgba(239,107,107,0.15); color: var(--accent-red); }
.red-flag {
  color: var(--accent-red);
  font-weight: 600;
}

/* ---- Video Container ---- */
.video-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin: 1.5rem 0 2rem;
}
.video-label {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
}
.video-container video {
  display: block;
  box-shadow: var(--shadow-lg);
}

/* ---- Claude Advice Section ---- */
.claude-advice {
  background: linear-gradient(135deg, rgba(221,146,197,0.06) 0%, rgba(175,152,230,0.06) 50%, rgba(218,153,230,0.04) 100%);
  border: 1px solid rgba(221,146,197,0.2);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin: 2.5rem 0;
  position: relative;
}
.claude-advice::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-rose), var(--accent-orchid), var(--accent-lavender));
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.claude-advice-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}
.claude-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-rose), var(--accent-lavender));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}
.claude-advice-header .claude-name {
  font-weight: 700;
  font-size: 0.95rem;
}
.claude-advice-header .claude-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.claude-tip {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  margin-bottom: 0.75rem;
}
.claude-tip:last-child { margin-bottom: 0; }
.claude-tip-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-orchid);
  margin-bottom: 0.3rem;
  letter-spacing: 0.05em;
}
.claude-tip h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}
.claude-tip p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}
.claude-tip .example-block {
  margin-top: 0.6rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  line-height: 1.6;
  color: var(--text-secondary);
}
.claude-tip .example-block .label-bad {
  color: var(--accent-red);
  font-weight: 600;
  font-family: var(--font-sans);
}
.claude-tip .example-block .label-good {
  color: var(--accent-gold);
  font-weight: 600;
  font-family: var(--font-sans);
}

/* ---- Hover Tooltip ---- */
.slash-tip {
  position: relative;
  cursor: help;
  border-bottom: 1.5px dashed var(--accent-red);
}
.slash-tip .slash-tip-bubble {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: 320px;
  padding: 0.65rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--accent-red);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--text-secondary);
  z-index: 50;
  text-align: left;
  font-style: normal;
  white-space: normal;
}
.slash-tip .slash-tip-bubble::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--accent-red);
}
.slash-tip:hover .slash-tip-bubble,
.slash-tip:focus .slash-tip-bubble {
  display: block;
}
@media (max-width: 640px) {
  .slash-tip .slash-tip-bubble {
    position: fixed;
    bottom: auto;
    top: auto;
    left: 1rem;
    right: 1rem;
    transform: none;
    max-width: none;
    bottom: 1rem;
  }
  .slash-tip .slash-tip-bubble::after { display: none; }
}

/* ---- Utility ---- */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.85rem; }

/* ---- Print-friendly ---- */
@media print {
  .top-nav, .progress-strip, .module-nav, .quiz-section { display: none; }
  body { background: #fff; color: #111; }
  .card, .ai-callout, .try-it { border: 1px solid #ccc; }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .page-container { padding: 1.25rem 1rem 3rem; }
  .module-nav { grid-template-columns: 1fr; }
  .module-nav a.next { grid-column: 1; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: rgba(14, 10, 24, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
    z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 0.65rem 1rem;
    font-size: 0.88rem;
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  .hamburger {
    display: flex;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: 8px;
    border: none;
    background: none;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
  }
  .hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 1px;
    transition: var(--transition);
  }
  .top-nav-inner { position: relative; }
}
@media (min-width: 769px) {
  .hamburger { display: none; }
}