/* ──────────────────────────────────────────────────────────────
   NavEase — GitHub Pages stylesheet
   ────────────────────────────────────────────────────────────── */

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

:root {
  --bg:           #0d0f14;
  --bg-card:      #161a22;
  --bg-card-2:    #1c2130;
  --border:       #252b3a;
  --border-light: #2e3650;
  --accent:       #7c6af7;
  --accent-2:     #5db8f5;
  --accent-glow:  rgba(124, 106, 247, 0.25);
  --text:         #e8eaf0;
  --text-muted:   #7a8099;
  --text-dim:     #4a5170;
  --code-bg:      #111520;
  --code-border:  #1e2535;
  --navbar-bg:    rgba(13, 15, 20, 0.85);
  --glow-opacity: 0.35;
  --cta-btn-outline-color: rgba(255,255,255,0.85);
  --cta-btn-outline-border: rgba(255,255,255,0.25);
  --cta-btn-outline-hover-color: #fff;
  --cta-btn-outline-hover-border: rgba(255,255,255,0.6);

  --kw:   #c792ea;
  --fn:   #82aaff;
  --cls:  #ffcb6b;
  --str:  #c3e88d;
  --num:  #f78c6c;
  --cmt:  #546e7a;
  --ann:  #89ddff;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 32px rgba(0,0,0,0.45);
  --transition: 0.2s ease;
}

/* ── Light theme: auto (system preference) ─────────────────────── */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg:           #f5f7fc;
    --bg-card:      #ffffff;
    --bg-card-2:    #edf0f8;
    --border:       #dde2f0;
    --border-light: #c6cedf;
    --accent:       #6c5ce7;
    --accent-2:     #3a9bd5;
    --accent-glow:  rgba(108, 92, 231, 0.2);
    --text:         #111827;
    --text-muted:   #4a5580;
    --text-dim:     #8892af;
    --code-bg:      #eef1f8;
    --code-border:  #d0d5e8;
    --navbar-bg:    rgba(245, 247, 252, 0.92);
    --glow-opacity: 0.18;
    --cta-btn-outline-color: var(--text);
    --cta-btn-outline-border: var(--border-light);
    --cta-btn-outline-hover-color: var(--accent);
    --cta-btn-outline-hover-border: var(--accent);

    --kw:   #7c3aed;
    --fn:   #1d4ed8;
    --cls:  #b45309;
    --str:  #15803d;
    --num:  #dc2626;
    --cmt:  #6b7280;
    --ann:  #0e7490;

    --shadow: 0 4px 32px rgba(0,0,0,0.1);
  }
}

/* ── Light theme: explicit toggle ──────────────────────────────── */
[data-theme="light"] {
  --bg:           #f5f7fc;
  --bg-card:      #ffffff;
  --bg-card-2:    #edf0f8;
  --border:       #dde2f0;
  --border-light: #c6cedf;
  --accent:       #6c5ce7;
  --accent-2:     #3a9bd5;
  --accent-glow:  rgba(108, 92, 231, 0.2);
  --text:         #111827;
  --text-muted:   #4a5580;
  --text-dim:     #8892af;
  --code-bg:      #eef1f8;
  --code-border:  #d0d5e8;
  --navbar-bg:    rgba(245, 247, 252, 0.92);
  --glow-opacity: 0.18;
  --cta-btn-outline-color: var(--text);
  --cta-btn-outline-border: var(--border-light);
  --cta-btn-outline-hover-color: var(--accent);
  --cta-btn-outline-hover-border: var(--accent);

  --kw:   #7c3aed;
  --fn:   #1d4ed8;
  --cls:  #b45309;
  --str:  #15803d;
  --num:  #dc2626;
  --cmt:  #6b7280;
  --ann:  #0e7490;

  --shadow: 0 4px 32px rgba(0,0,0,0.1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-2); }

code, pre {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.85em;
}

code {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 5px;
  padding: 1px 6px;
  color: var(--cls);
}

/* ── Layout ───────────────────────────────────────────────────── */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 96px 0; }

/* ── Navbar ───────────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navbar-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.02em;
}
.nav-brand:hover { color: var(--accent); }

.brand-icon { font-size: 1.3em; }

.nav-links {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.nav-links a:hover, .nav-links a.active-link {
  background: var(--bg-card);
  color: var(--text);
}

.nav-github {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card) !important;
  border: 1px solid var(--border) !important;
  color: var(--text) !important;
  padding: 6px 14px !important;
}
.nav-github:hover { border-color: var(--accent) !important; color: var(--accent) !important; }

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ── Theme toggle button ──────────────────────────────────────── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.theme-toggle svg { display: block; pointer-events: none; }

/* ── Hero tab buttons ─────────────────────────────────────────── */
.hero-tab-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  white-space: nowrap;
}
.hero-tab-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.hero-tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 24px var(--accent-glow);
}
.btn-primary:hover {
  background: #9381ff;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 32px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-light);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-outline-light {
  background: transparent;
  color: var(--cta-btn-outline-color);
  border: 1px solid var(--cta-btn-outline-border);
}
.btn-outline-light:hover {
  border-color: var(--cta-btn-outline-hover-border);
  color: var(--cta-btn-outline-hover-color);
  transform: translateY(-2px);
}

/* ── Hero ─────────────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  opacity: var(--glow-opacity);
  transition: opacity var(--transition);
}

.hero-glow-1 {
  width: 640px; height: 640px;
  background: radial-gradient(circle, #7c6af7 0%, transparent 70%);
  top: -200px; left: -100px;
}
.hero-glow-2 {
  width: 480px; height: 480px;
  background: radial-gradient(circle, #5db8f5 0%, transparent 70%);
  bottom: -150px; right: -80px;
}

.hero-inner {
  position: relative;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 28px;
}
.badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}

.hero-title {
  font-size: clamp(2.6rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.gradient-text {
  background: linear-gradient(135deg, #7c6af7 0%, #5db8f5 50%, #f78f6b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 620px;
  margin-bottom: 36px;
  line-height: 1.75;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

/* ── Code windows ─────────────────────────────────────────────── */
.code-window {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-code {
  max-width: 740px;
}
.hero-code .code-window { }

.code-header {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 18px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--code-border);
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red    { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green  { background: #28c840; }
.code-title {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-left: 6px;
  font-family: 'JetBrains Mono', monospace;
}

.code-block {
  padding: 22px 24px;
  font-size: 0.84rem;
  line-height: 1.75;
  overflow-x: auto;
  color: var(--text-muted);
  white-space: pre;
}

/* Syntax highlighting spans */
.kw  { color: var(--kw); }
.fn  { color: var(--fn); }
.cls { color: var(--cls); }
.str { color: var(--str); }
.num { color: var(--num); }
.cmt { color: var(--cmt); font-style: italic; }
.ann { color: var(--ann); }

/* ── Platforms ────────────────────────────────────────────────── */
.platforms {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}

.platforms-label {
  text-align: center;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.platforms-grid {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.platform-badge {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 8px 22px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
}
.platform-badge:hover {
  border-color: var(--accent);
  color: var(--text);
}

/* ── Section header ───────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(124,106,247,0.15), rgba(93,184,245,0.15));
  border: 1px solid rgba(124,106,247,0.3);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-radius: 100px;
  padding: 5px 16px;
  margin-bottom: 18px;
}

.section-header h2 {
  font-size: clamp(1.9rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.75;
}

/* ── Features ─────────────────────────────────────────────────── */
.features { background: var(--bg); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(124,106,247,0.15);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ── How It Works ─────────────────────────────────────────────── */
.how-it-works { background: var(--bg-card); }

.steps {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 64px;
  flex-wrap: wrap;
  justify-content: center;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  max-width: 300px;
  flex: 1;
  min-width: 220px;
}

.step-number {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  box-shadow: 0 0 16px var(--accent-glow);
}

.step-content h3 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.step-content p  { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }

.step-arrow {
  color: var(--text-dim);
  font-size: 1.8rem;
  padding-top: 10px;
  flex-shrink: 0;
}

/* Flow diagram */
.flow-diagram {
  display: flex;
  align-items: stretch;
  gap: 0;
  max-width: 900px;
  margin: 0 auto;
}

.flow-card {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}
.flow-card code { display: block; text-align: left; line-height: 1.9; background: none; border: none; color: var(--text-muted); }
.flow-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 12px;
  font-weight: 600;
}
.flow-card.ksp   { border-color: var(--accent); background: rgba(124,106,247,0.05); }
.flow-card.ksp code { color: var(--fn); }

.flow-arrow {
  display: flex;
  align-items: center;
  padding: 0 20px;
  color: var(--text-dim);
  font-size: 1.8rem;
  flex-shrink: 0;
}

/* ── Quick Start ──────────────────────────────────────────────── */
.quick-start { background: var(--bg); }

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.tab {
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
}
.tab:hover { border-color: var(--accent); color: var(--text); }
.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 16px var(--accent-glow);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

.tab-desc {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

/* ── Demo ─────────────────────────────────────────────────────── */
.demo { background: var(--bg-card); }

.demo-screens {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 56px;
}

.demo-screen-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
}
.demo-screen-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.demo-screen-icon { font-size: 2.2rem; margin-bottom: 14px; }
.demo-screen-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 4px; }
.demo-route { margin-bottom: 10px; }
.demo-route code { font-size: 0.8rem; color: var(--fn); background: rgba(130,170,255,0.1); border-color: rgba(130,170,255,0.2); }
.demo-screen-card > p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.65; margin-bottom: 14px; }

.demo-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.demo-tag {
  background: rgba(124,106,247,0.12);
  border: 1px solid rgba(124,106,247,0.25);
  color: var(--accent);
  border-radius: 100px;
  padding: 3px 10px;
  font-size: 0.72rem;
  font-weight: 600;
}

/* Navigation flow diagram */
.demo-flow {
  display: flex;
  align-items: center;
  gap: 4px;
  justify-content: center;
  margin-bottom: 4px;
  flex-wrap: wrap;
}

.flow-node {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
}
.flow-node.highlight { border-color: var(--accent); color: var(--accent); background: rgba(124,106,247,0.08); }

.flow-line { color: var(--text-dim); font-size: 1.1rem; padding: 0 4px; }
.flow-line.branch { transform: rotate(90deg); }
.flow-divider { flex: none; }
.flow-spacer { width: 80px; }

.demo-flow-secondary { margin-top: 0; }

/* Run commands */
.demo-run {
  margin-top: 48px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.demo-run-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  font-weight: 600;
  margin-bottom: 18px;
}
.demo-commands { display: flex; flex-direction: column; gap: 12px; }
.demo-command {
  display: flex;
  align-items: center;
  gap: 16px;
}
.demo-platform {
  min-width: 80px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: right;
}
.demo-command code {
  flex: 1;
  background: var(--code-bg);
  border-color: var(--code-border);
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--str);
  font-size: 0.83rem;
}

/* ── Generated code ───────────────────────────────────────────── */
.generated { background: var(--bg); }
.generated-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(440px, 1fr));
  gap: 24px;
}
.generated-code .code-block { font-size: 0.8rem; }

/* ── Modules ──────────────────────────────────────────────────── */
.modules { background: var(--bg-card); }
.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.module-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
}
.module-card:hover { border-color: var(--border-light); transform: translateY(-2px); }
.module-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}
.module-icon { font-size: 2rem; flex-shrink: 0; }
.module-header h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.module-sub { font-size: 0.83rem; color: var(--text-muted); }
.module-files {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 0;
}
.module-files li {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}
.module-files li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ── CTA ──────────────────────────────────────────────────────── */
.cta {
  background: radial-gradient(ellipse at center, rgba(124,106,247,0.12) 0%, transparent 70%),
              var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.cta-inner {
  position: relative;
  text-align: center;
  padding: 80px 0;
  overflow: hidden;
}

.cta-glow-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,106,247,0.3) 0%, transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}
.cta-glow-2 { display: none; }

.cta-inner h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  position: relative;
}
.cta-inner p {
  color: var(--text-muted);
  max-width: 460px;
  margin: 0 auto 36px;
  font-size: 1.05rem;
  position: relative;
}

/* ── Footer ───────────────────────────────────────────────────── */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 36px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}

.footer-copy { font-size: 0.83rem; color: var(--text-dim); }

.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }

/* ── Fade-in animations ───────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  section { padding: 72px 0; }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 24px 20px;
    gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-hamburger { display: block; }

  .hero { padding: 80px 0 60px; }
  .hero-title { font-size: 2.4rem; }

  .steps { flex-direction: column; align-items: center; }
  .step-arrow { transform: rotate(90deg); padding: 4px 0; }

  .flow-diagram { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); padding: 4px 0; }

  .generated-grid, .modules-grid {
    grid-template-columns: 1fr;
  }

  .demo-flow { display: none; }
  .demo-flow-secondary { display: none; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; }
  .btn { justify-content: center; }
  .tabs { gap: 6px; }
  .tab { font-size: 0.8rem; padding: 8px 14px; }
}

  /* ──────────────────────────────────────────────────────────────
     NavEase — GitHub Pages stylesheet (Enhanced)
     ────────────────────────────────────────────────────────────── */

  /* [KEEP ALL EXISTING CSS FROM YOUR ORIGINAL FILE, THEN ADD BELOW] */

  /* ── Paths / Choose Your Path ─────────────────────────────────── */
  .paths { background: var(--bg-card); }

  .paths-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
  }

  .path-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition);
    position: relative;
  }

  .path-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 8px 32px rgba(124,106,247,0.12);
  }

  .path-card.recommended {
    border-color: var(--accent);
    box-shadow: 0 0 32px var(--accent-glow);
  }

  .path-badge {
    position: absolute;
    top: -1px;
    right: 20px;
    background: var(--accent);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 4px 12px;
    border-radius: 0 0 8px 8px;
  }

  .path-icon {
    font-size: 2.2rem;
    margin-bottom: 14px;
  }

  .path-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .path-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
    flex: 1;
  }

  .path-pros {
    list-style: none;
    margin-bottom: 20px;
    padding: 0;
  }

  .path-pros li {
    font-size: 0.85rem;
    color: var(--text-muted);
    padding-left: 18px;
    position: relative;
    margin-bottom: 6px;
  }

  .path-pros li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
  }

  /* ── Implementation Steps ─────────────────────────────────────── */
  .implementation { background: var(--bg); }
  .implementation.alt-bg { background: var(--bg-card); }

  .step-track {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .step-item {
    display: flex;
    gap: 20px;
    padding: 28px 0;
  }

  .step-marker {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    color: #fff;
    box-shadow: 0 0 20px var(--accent-glow);
  }

  .step-body {
    flex: 1;
  }

  .step-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
  }

  .step-body p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 14px;
    line-height: 1.7;
  }

  .step-note {
    font-size: 0.85rem !important;
    color: var(--text-dim) !important;
    border-left: 3px solid var(--accent);
    padding-left: 14px;
    margin-top: 12px;
  }

  .step-arrow {
    text-align: center;
    color: var(--text-dim);
    font-size: 1.6rem;
    padding: 4px 0;
    padding-left: 68px;
  }

  /* ── Configuration Table ──────────────────────────────────────── */
  .configure { background: var(--bg-card); }

  .config-table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
  }

  .config-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
  }

  .config-table th,
  .config-table td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--border);
  }

  .config-table th {
    background: var(--bg-card-2);
    color: var(--text);
    font-weight: 600;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
  }

  .config-table td {
    color: var(--text-muted);
    vertical-align: top;
  }

  .config-table td code {
    font-size: 0.85em;
    background: rgba(124,106,247,0.08);
    border-color: rgba(124,106,247,0.2);
    color: var(--accent);
  }

  .config-table tr:last-child td {
    border-bottom: none;
  }

  /* ── FAQ Accordion ───────────────────────────────────────────── */
  .faq { background: var(--bg); }

  .faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: all var(--transition);
  }

  .faq-item.open {
    border-color: var(--accent);
    box-shadow: 0 4px 24px rgba(124,106,247,0.08);
  }

  .faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 18px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    text-align: left;
  }

  .faq-chevron {
    color: var(--text-dim);
    font-size: 1.4rem;
    transition: transform 0.2s ease;
    flex-shrink: 0;
    margin-left: 12px;
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 22px;
  }

  .faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 22px 18px;
  }

  .faq-answer p {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.7;
  }

  /* ── Responsive additions ─────────────────────────────────────── */
  @media (max-width: 768px) {
    .step-item {
      flex-direction: column;
      gap: 14px;
    }
    .step-arrow {
      padding-left: 0;
      text-align: center;
    }
    .step-marker {
      width: 40px;
      height: 40px;
      font-size: 1rem;
    }
    .config-table th,
    .config-table td {
      padding: 10px 12px;
      font-size: 0.85rem;
    }
    .path-card {
      padding: 22px;
    }
  }