@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-0: #040b18;
  --bg-1: #071324;
  --bg-2: #0d1e38;
  --bg-3: #132845;
  --bg-4: #1a3355;
  --text-1: #e2e8f4;
  --text-2: #8fa0b8;
  --text-3: #4a5e78;
  --accent-1: #06d6c4;
  --accent-2: #2563eb;
  --accent-3: #818cf8;
  --border: #172d47;
  --border-light: #203d5c;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --radius: 5px;
  --radius-lg: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.45);
  --shadow-sm: 0 2px 10px rgba(0,0,0,0.3);
  --transition: all 0.25s ease;
  --max-width: 1220px;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* ─── RESET ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg-0);
  color: var(--text-1);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--accent-1); text-decoration: none; transition: var(--transition); }
a:hover { color: #fff; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: var(--font-body); }
input, textarea, select { font-family: var(--font-body); }

/* ─── LAYOUT ─────────────────────────────────────── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: 860px; margin: 0 auto; padding: 0 24px; }
.container--wide { max-width: 1400px; margin: 0 auto; padding: 0 24px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.grid-2-1 { display: grid; grid-template-columns: 2fr 1fr; gap: 48px; }
.grid-1-2 { display: grid; grid-template-columns: 1fr 2fr; gap: 48px; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-gap { display: flex; gap: 16px; }

/* ─── TYPOGRAPHY ─────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-1);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(2rem, 4vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h4 { font-size: 1.15rem; }
h5 { font-size: 1rem; }
p { color: var(--text-2); margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.text-mono { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-1); letter-spacing: 0.05em; }
.text-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 500;
}
.text-muted { color: var(--text-2); }
.text-faint { color: var(--text-3); }
.text-accent { color: var(--accent-1); }
.text-blue { color: var(--accent-2); }
.text-center { text-align: center; }
strong { color: var(--text-1); font-weight: 600; }

/* ─── SECTION ────────────────────────────────────── */
.section { padding: 80px 0; }
.section--sm { padding: 48px 0; }
.section--lg { padding: 110px 0; }
.section-sep { border: 0; border-top: 1px solid var(--border); margin: 0; }
.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-1);
  margin-bottom: 12px;
  display: block;
}
.section-title { margin-bottom: 16px; }
.section-desc { color: var(--text-2); max-width: 620px; font-size: 1.05rem; }
.section-head { margin-bottom: 48px; }
.section-head--center { text-align: center; }
.section-head--center .section-desc { margin: 0 auto; }

/* ─── HEADER ─────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(4, 11, 24, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
  gap: 32px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-mark {
  width: 38px;
  height: 38px;
  background: var(--accent-1);
  color: var(--bg-0);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  flex-shrink: 0;
}
.logo-name {
  display: block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-1);
  line-height: 1;
}
.logo-tagline {
  display: block;
  font-size: 0.62rem;
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}
.main-nav ul {
  display: flex;
  gap: 4px;
  align-items: center;
}
.main-nav > ul > li { position: relative; }
.main-nav a {
  display: block;
  padding: 6px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-2);
  border-radius: var(--radius);
  transition: var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--text-1);
  background: var(--bg-2);
}
.has-dropdown > a::after {
  content: ' ▾';
  font-size: 0.7em;
  opacity: 0.6;
}
.dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--bg-2);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 8px;
  min-width: 200px;
  box-shadow: var(--shadow);
  z-index: 10;
}
.has-dropdown:hover .dropdown,
.has-dropdown.dropdown-open .dropdown { display: block; }
.dropdown li a {
  padding: 8px 14px;
  font-size: 0.85rem;
  border-radius: var(--radius);
  white-space: nowrap;
  display: block;
}
.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
}
.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: var(--transition);
}

/* ─── BUTTONS ────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 0.88rem;
  border: 1px solid transparent;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent-1);
  color: var(--bg-0);
  border-color: var(--accent-1);
}
.btn-primary:hover {
  background: #04c4b2;
  border-color: #04c4b2;
  color: var(--bg-0);
}
.btn-secondary {
  background: var(--bg-2);
  color: var(--text-1);
  border-color: var(--border-light);
}
.btn-secondary:hover {
  background: var(--bg-3);
  color: var(--text-1);
  border-color: var(--border-light);
}
.btn-outline {
  background: transparent;
  color: var(--accent-1);
  border-color: var(--accent-1);
}
.btn-outline:hover {
  background: var(--accent-1);
  color: var(--bg-0);
}
.btn-ghost {
  background: none;
  color: var(--text-2);
  border-color: transparent;
  padding: 9px 12px;
}
.btn-ghost:hover { color: var(--text-1); background: var(--bg-2); }
.btn-lg { padding: 13px 28px; font-size: 0.95rem; }
.btn-sm { padding: 6px 14px; font-size: 0.8rem; }

/* ─── TAGS / BADGES ──────────────────────────────── */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  border: 1px solid;
}
.tag-cyan { background: rgba(6,214,196,0.08); border-color: rgba(6,214,196,0.3); color: var(--accent-1); }
.tag-blue { background: rgba(37,99,235,0.1); border-color: rgba(37,99,235,0.3); color: #60a5fa; }
.tag-indigo { background: rgba(129,140,248,0.1); border-color: rgba(129,140,248,0.3); color: var(--accent-3); }
.tag-gold { background: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.3); color: #fbbf24; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* ─── CARDS ──────────────────────────────────────── */
.card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.card:hover { border-color: var(--border-light); transform: translateY(-2px); box-shadow: var(--shadow); }
.card-img { width: 100%; height: 200px; object-fit: cover; }
.card-img--lg { height: 240px; }
.card-body { padding: 24px; }
.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.card-date { font-size: 0.76rem; color: var(--text-3); font-family: var(--font-mono); }
.card-title { margin-bottom: 10px; }
.card-title a { color: var(--text-1); }
.card-title a:hover { color: var(--accent-1); }
.card-excerpt { color: var(--text-2); font-size: 0.9rem; margin-bottom: 16px; }
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  margin-top: 16px;
}

/* ─── HERO ───────────────────────────────────────── */
.hero {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 70% 50%, rgba(6,214,196,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.hero-label { margin-bottom: 20px; }
.hero-label span { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-1); }
.hero-title { margin-bottom: 20px; }
.hero-title .highlight { color: var(--accent-1); }
.hero-desc { color: var(--text-2); font-size: 1.05rem; margin-bottom: 32px; max-width: 500px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta { display: flex; gap: 32px; margin-top: 40px; flex-wrap: wrap; }
.hero-stat-val {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-1);
  display: block;
  line-height: 1;
}
.hero-stat-label { font-size: 0.78rem; color: var(--text-3); margin-top: 4px; }
.hero-img-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
}
.hero-img-wrap img { width: 100%; height: 420px; object-fit: cover; }
.hero-img-badge {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(4,11,24,0.85);
  border: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
  border-radius: var(--radius);
  padding: 10px 16px;
}
.hero-img-badge .badge-val { font-family: var(--font-mono); font-size: 1.2rem; color: var(--accent-1); font-weight: 500; }
.hero-img-badge .badge-label { font-size: 0.72rem; color: var(--text-3); }

/* ─── DATA / STATS BLOCKS ────────────────────────── */
.stats-bar {
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}
.stats-bar-inner {
  display: flex;
  gap: 0;
  align-items: center;
}
.stat-item {
  flex: 1;
  padding: 0 32px;
  border-right: 1px solid var(--border);
}
.stat-item:first-child { padding-left: 0; }
.stat-item:last-child { border-right: none; }
.stat-val {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-1);
  display: block;
  line-height: 1;
}
.stat-val .unit { font-size: 1.2rem; color: var(--accent-1); }
.stat-label { font-size: 0.8rem; color: var(--text-3); margin-top: 6px; }
.stat-delta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--success);
  margin-top: 4px;
}

/* ─── DATA TABLE ─────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th {
  text-align: left;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
  font-weight: 400;
}
.data-table td { padding: 14px 16px; border-bottom: 1px solid var(--border); color: var(--text-2); vertical-align: middle; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-2); }
.data-table td strong { color: var(--text-1); }

/* ─── PROGRESS BAR ───────────────────────────────── */
.progress-wrap { margin-bottom: 20px; }
.progress-head { display: flex; justify-content: space-between; margin-bottom: 8px; }
.progress-label { font-size: 0.85rem; color: var(--text-2); }
.progress-pct { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-1); }
.progress-bar {
  height: 4px;
  background: var(--bg-3);
  border-radius: 100px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent-1);
  border-radius: 100px;
  transition: width 1s ease;
}

/* ─── ARTICLE / CONTENT ──────────────────────────── */
.article-hero {
  padding: 48px 0 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 56px;
}
.article-hero-inner { padding-bottom: 40px; }
.article-breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-3);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.article-breadcrumb a { color: var(--text-3); }
.article-breadcrumb a:hover { color: var(--accent-1); }
.article-breadcrumb .sep { color: var(--text-3); }
.article-meta { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; margin-bottom: 24px; }
.article-author { font-size: 0.82rem; color: var(--text-2); }
.article-date { font-family: var(--font-mono); font-size: 0.76rem; color: var(--text-3); }
.article-read-time { font-size: 0.78rem; color: var(--text-3); }
.article-img { width: 100%; max-height: 440px; object-fit: cover; border-radius: var(--radius-lg); margin-bottom: 48px; }

.article-content { font-size: 1rem; line-height: 1.78; }
.article-content p { color: var(--text-2); margin-bottom: 1.4rem; }
.article-content h2 { margin: 2.4rem 0 1rem; font-size: 1.5rem; color: var(--text-1); }
.article-content h3 { margin: 1.8rem 0 0.8rem; font-size: 1.2rem; }
.article-content ul, .article-content ol { margin: 1rem 0 1.4rem 1.5rem; color: var(--text-2); }
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 0.5rem; }
.article-content blockquote {
  border-left: 3px solid var(--accent-1);
  padding: 16px 24px;
  margin: 2rem 0;
  background: var(--bg-2);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.article-content blockquote p { color: var(--text-1); font-style: italic; }
.article-content code {
  font-family: var(--font-mono);
  background: var(--bg-3);
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 0.85em;
  color: var(--accent-1);
}
.article-content pre {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  overflow-x: auto;
  margin: 1.5rem 0;
}
.article-content pre code { background: none; padding: 0; font-size: 0.88rem; }

/* ─── SIDEBAR ────────────────────────────────────── */
.sidebar-widget {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}
.sidebar-widget-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.sidebar-list li { border-bottom: 1px solid var(--border); }
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a {
  display: block;
  padding: 10px 0;
  font-size: 0.87rem;
  color: var(--text-2);
}
.sidebar-list a:hover { color: var(--accent-1); }

/* ─── COURSE CARD ────────────────────────────────── */
.course-card { background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition); }
.course-card:hover { border-color: var(--border-light); transform: translateY(-2px); box-shadow: var(--shadow); }
.course-card-img { width: 100%; height: 180px; object-fit: cover; }
.course-card-body { padding: 20px; }
.course-card-level { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent-1); margin-bottom: 8px; }
.course-card-title { font-size: 1.05rem; margin-bottom: 10px; }
.course-card-title a { color: var(--text-1); }
.course-card-title a:hover { color: var(--accent-1); }
.course-card-desc { font-size: 0.85rem; color: var(--text-2); margin-bottom: 16px; line-height: 1.55; }
.course-card-footer { display: flex; gap: 16px; align-items: center; padding-top: 14px; border-top: 1px solid var(--border); flex-wrap: wrap; }
.course-meta-item { font-size: 0.78rem; color: var(--text-3); font-family: var(--font-mono); }

/* ─── EXPERT CARD ────────────────────────────────── */
.expert-card { background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; transition: var(--transition); }
.expert-card:hover { border-color: var(--border-light); box-shadow: var(--shadow-sm); }
.expert-img { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; border: 2px solid var(--border-light); margin-bottom: 16px; }
.expert-name { font-size: 1.05rem; font-weight: 600; margin-bottom: 4px; }
.expert-title { font-size: 0.82rem; color: var(--accent-1); margin-bottom: 12px; }
.expert-bio { font-size: 0.88rem; color: var(--text-2); line-height: 1.55; }

/* ─── FAQ ────────────────────────────────────────── */
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 8px; overflow: hidden; transition: var(--transition); }
.faq-item.open { border-color: var(--border-light); }
.faq-question {
  width: 100%;
  text-align: left;
  padding: 18px 20px;
  background: var(--bg-1);
  border: none;
  color: var(--text-1);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}
.faq-question:hover { background: var(--bg-2); }
.faq-icon { font-size: 1.2rem; color: var(--accent-1); flex-shrink: 0; transition: var(--transition); }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer { display: none; padding: 0 20px 20px; background: var(--bg-1); }
.faq-answer p { color: var(--text-2); font-size: 0.92rem; }

/* ─── GLOSSARY ───────────────────────────────────── */
.glossary-letter { font-family: var(--font-heading); font-size: 2rem; font-weight: 700; color: var(--accent-1); margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.glossary-item { padding: 20px 0; border-bottom: 1px solid var(--border); }
.glossary-item:last-child { border-bottom: none; }
.glossary-term { font-size: 1rem; font-weight: 600; color: var(--text-1); margin-bottom: 8px; }
.glossary-def { font-size: 0.9rem; color: var(--text-2); line-height: 1.6; }

/* ─── TOOLS ──────────────────────────────────────── */
.tool-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.tool-card:hover { border-color: var(--border-light); box-shadow: var(--shadow-sm); }
.tool-icon {
  width: 44px;
  height: 44px;
  background: var(--bg-3);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--accent-1);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: -0.02em;
}
.tool-name { font-size: 1rem; font-weight: 600; color: var(--text-1); }
.tool-desc { font-size: 0.85rem; color: var(--text-2); line-height: 1.55; flex: 1; }
.tool-link { font-size: 0.8rem; color: var(--accent-1); font-weight: 500; }

/* ─── FORM ───────────────────────────────────────── */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 0.84rem; font-weight: 500; color: var(--text-2); margin-bottom: 8px; }
.form-control {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 11px 14px;
  color: var(--text-1);
  font-size: 0.9rem;
  transition: var(--transition);
  outline: none;
}
.form-control:focus { border-color: var(--accent-1); box-shadow: 0 0 0 3px rgba(6,214,196,0.1); }
.form-control::placeholder { color: var(--text-3); }
textarea.form-control { resize: vertical; min-height: 130px; }
.form-success {
  display: none;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius);
  padding: 16px 20px;
  color: var(--success);
  font-size: 0.9rem;
  margin-top: 16px;
}
.form-success.show { display: block; }

/* ─── PAGINATION ─────────────────────────────────── */
.pagination { display: flex; gap: 6px; align-items: center; justify-content: center; margin-top: 48px; }
.page-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-1);
  color: var(--text-2);
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.page-btn:hover, .page-btn.active {
  background: var(--accent-1);
  border-color: var(--accent-1);
  color: var(--bg-0);
}

/* ─── INFO BLOCKS ────────────────────────────────── */
.info-block {
  background: var(--bg-2);
  border-left: 3px solid var(--accent-1);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
  margin: 24px 0;
}
.info-block p { color: var(--text-2); font-size: 0.9rem; }
.info-block strong { color: var(--accent-1); }

.alert {
  padding: 14px 20px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  margin-bottom: 20px;
  border: 1px solid;
}
.alert-info { background: rgba(37,99,235,0.08); border-color: rgba(37,99,235,0.25); color: #60a5fa; }

/* ─── PAGE HERO (inner pages) ────────────────────── */
.page-hero {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(to bottom, var(--bg-1), var(--bg-0));
}
.page-hero-breadcrumb {
  font-size: 0.76rem;
  color: var(--text-3);
  margin-bottom: 20px;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.page-hero-breadcrumb a { color: var(--text-3); }
.page-hero-breadcrumb a:hover { color: var(--accent-1); }
.page-hero-label { display: block; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-1); margin-bottom: 16px; }
.page-hero-title { margin-bottom: 14px; }
.page-hero-desc { color: var(--text-2); font-size: 1rem; max-width: 700px; }

/* ─── FOOTER ─────────────────────────────────────── */
.site-footer {
  background: var(--bg-1);
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
  margin-top: 80px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-brand-desc { color: var(--text-3); font-size: 0.88rem; line-height: 1.65; margin-top: 16px; }
.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: 0.88rem; color: var(--text-2); }
.footer-links a:hover { color: var(--accent-1); }
.footer-contact-item { display: flex; flex-direction: column; gap: 2px; margin-bottom: 12px; }
.footer-contact-item .lbl { font-size: 0.72rem; color: var(--text-3); font-family: var(--font-mono); letter-spacing: 0.08em; }
.footer-contact-item a, .footer-contact-item span { font-size: 0.88rem; color: var(--text-2); }
.footer-contact-item a:hover { color: var(--accent-1); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copy { font-size: 0.8rem; color: var(--text-3); }
.footer-policy-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-policy-links a { font-size: 0.78rem; color: var(--text-3); }
.footer-policy-links a:hover { color: var(--accent-1); }

/* ─── RESEARCH PAGE ──────────────────────────────── */
.chart-bar-row { display: flex; align-items: center; gap: 16px; margin-bottom: 14px; }
.chart-bar-label { font-size: 0.82rem; color: var(--text-2); width: 140px; flex-shrink: 0; }
.chart-bar-track { flex: 1; height: 8px; background: var(--bg-3); border-radius: 100px; overflow: hidden; }
.chart-bar-fill { height: 100%; background: var(--accent-1); border-radius: 100px; }
.chart-bar-val { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent-1); width: 40px; text-align: right; flex-shrink: 0; }

/* ─── SITEMAP ────────────────────────────────────── */
.sitemap-section { margin-bottom: 40px; }
.sitemap-section-title { font-size: 1rem; font-weight: 600; color: var(--accent-1); margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--border); font-family: var(--font-mono); letter-spacing: 0.05em; text-transform: uppercase; font-size: 0.78rem; }
.sitemap-links { display: flex; flex-direction: column; gap: 8px; }
.sitemap-links a { font-size: 0.9rem; color: var(--text-2); padding-left: 16px; border-left: 2px solid var(--border); }
.sitemap-links a:hover { color: var(--accent-1); border-left-color: var(--accent-1); }

/* ─── POLICY PAGES ───────────────────────────────── */
.policy-content { font-size: 0.95rem; line-height: 1.8; }
.policy-content h2 { font-size: 1.25rem; color: var(--text-1); margin: 2.5rem 0 1rem; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.policy-content h3 { font-size: 1.05rem; color: var(--text-1); margin: 1.8rem 0 0.7rem; }
.policy-content p { color: var(--text-2); margin-bottom: 1.1rem; }
.policy-content ul, .policy-content ol { margin: 0.8rem 0 1.2rem 1.5rem; color: var(--text-2); }
.policy-content ul { list-style: disc; }
.policy-content ol { list-style: decimal; }
.policy-content li { margin-bottom: 0.5rem; }
.policy-content a { color: var(--accent-1); }
.policy-content strong { color: var(--text-1); }
.policy-meta { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-3); margin-bottom: 32px; }

/* ─── INDEX FEATURES ─────────────────────────────── */
.feature-item {
  padding: 28px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.feature-item:hover { border-color: var(--border-light); }
.feature-icon { font-size: 1.8rem; margin-bottom: 16px; color: var(--accent-1); font-family: var(--font-mono); font-weight: 700; font-size: 0.9rem; background: var(--bg-3); width: 42px; height: 42px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius); }
.feature-title { font-size: 1rem; font-weight: 600; margin-bottom: 10px; }
.feature-desc { font-size: 0.87rem; color: var(--text-2); line-height: 1.6; }

/* ─── RESPONSIVE ─────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .hero-inner { gap: 40px; }
  .grid-2-1 { grid-template-columns: 1fr; }
  .grid-1-2 { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-img-wrap { display: none; }
  .main-nav { display: none; }
  .main-nav.open { display: block; position: absolute; top: 66px; left: 0; right: 0; background: var(--bg-1); border-bottom: 1px solid var(--border); padding: 16px; }
  .main-nav.open > ul { flex-direction: column; }
  .main-nav.open .dropdown { position: static; box-shadow: none; border: none; background: var(--bg-2); border-radius: var(--radius); margin-top: 4px; padding: 4px 0 4px 12px; }
  .mobile-toggle { display: flex; }
  .stats-bar-inner { flex-direction: column; gap: 24px; align-items: flex-start; }
  .stat-item { border-right: none; padding: 0; border-bottom: 1px solid var(--border); width: 100%; padding-bottom: 16px; }
  .stat-item:last-child { border-bottom: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .hero-meta { gap: 20px; }
  .section { padding: 56px 0; }
  .header-actions .btn { display: none; }
  .header-actions .mobile-toggle { display: flex; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
}