/* =============================================
   ReviewOS — nexusreview dark aesthetic
   ============================================= */

:root {
  --bg: #0d0d0d;
  --bg-alt: #141414;
  --bg-card: #1a1a1a;
  --fg: #f0ede8;
  --fg-muted: #8a8a8a;
  --fg-dim: #5a5a5a;
  --border: #252525;
  --border-light: #1e1e1e;
  --accent: #d97706;
  --accent-dim: rgba(217, 119, 6, 0.12);
  --accent-hover: #b45309;
  --teal: #14b8a6;
  --teal-dim: rgba(20, 184, 166, 0.1);
  --purple: #7c3aed;
  --purple-dim: rgba(124, 58, 237, 0.1);
  --green: #16a34a;
  --green-dim: rgba(22, 163, 74, 0.1);
  --radius: 12px;
  --radius-lg: 20px;
  --font-display: 'Lora', Georgia, serif;
  --font-body: 'Geist', system-ui, sans-serif;
  --font-mono: 'Geist', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 13, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 48px;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
  text-decoration: none;
}
.wordmark span { color: var(--accent); }
.site-header nav { display: flex; gap: 36px; }
.site-header nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.site-header nav a:hover { color: var(--fg); }

/* ===== HERO ===== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px 48px 100px;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}
.hero-glow-1 {
  width: 600px; height: 600px;
  top: 10%; right: 5%;
  background: #d97706;
  opacity: 0.06;
}
.hero-glow-2 {
  width: 400px; height: 400px;
  bottom: 20%; left: 15%;
  background: #14b8a6;
  opacity: 0.05;
}

.hero-inner {
  position: relative;
  z-index: 10;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: center;
}

/* Hero left */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(217, 119, 6, 0.3);
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 28px;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 4.5vw, 4rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 20px;
}
.hero-headline em {
  font-style: italic;
  font-weight: 400;
  color: var(--fg-muted);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.8;
  max-width: 50ch;
  margin-bottom: 36px;
}
.hero-sub em { font-style: italic; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 11px 28px;
  border-radius: 100px;
  text-decoration: none;
  transition: background 0.15s;
  cursor: pointer;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg-muted);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 11px 28px;
  border-radius: 100px;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}
.btn-ghost:hover { border-color: var(--fg-muted); color: var(--fg); }
.btn-ghost svg { transition: transform 0.15s; }
.btn-ghost:hover svg { transform: translateX(3px); }

.hero-social-proof { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.avatar-stack { display: flex; }
.avatar-stack img {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 2px solid var(--bg);
  object-fit: cover;
  margin-left: -8px;
}
.avatar-stack img:first-child { margin-left: 0; }
.social-text { font-size: 0.875rem; color: var(--fg-muted); }
.social-text strong { color: var(--fg); }

/* Hero right — visual */
.hero-visual { position: relative; }

.live-query-card {
  position: absolute;
  left: -16px; top: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  transform: rotate(-2deg);
  z-index: 3;
}
.live-query-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-dim);
  margin-bottom: 8px;
}
.live-query-input {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.85rem; color: var(--fg);
}
.live-query-input svg { color: var(--fg-dim); flex-shrink: 0; }

.ai-response-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  padding: 20px 22px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.4);
  z-index: 2;
}
.ai-badge {
  display: inline-flex; align-items: center; gap: 5px;
  border: 1px solid rgba(217, 119, 6, 0.25);
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 100px;
  margin-bottom: 10px;
}
.confidence-tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--fg-dim);
  margin-left: auto;
}
.ai-response-text {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--fg);
  margin-bottom: 14px;
}
.ai-response-text strong { color: var(--accent); }
.ai-response-text em { color: var(--fg-muted); }
.ai-sources {
  border-top: 1px solid var(--border-light);
  padding-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.ai-source { font-size: 0.68rem; color: var(--fg-dim); }
.ai-source span { color: var(--accent); font-weight: 700; }
.ai-source em { color: var(--fg-dim); font-style: italic; }

.article-count-badge {
  position: absolute;
  left: -8px; bottom: 48px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 100px;
  display: flex; align-items: center; gap: 6px;
  box-shadow: 0 8px 24px rgba(217, 119, 6, 0.3);
  z-index: 4;
  transform: rotate(1deg);
}
.article-count-badge .dot { color: rgba(255,255,255,0.6); }

.doi-tag {
  position: absolute;
  bottom: -8px; right: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--fg-dim);
  padding: 5px 12px;
  border-radius: 8px;
  display: flex; align-items: center; gap: 4px;
  z-index: 4;
  transform: rotate(-1deg);
}

.scroll-hint {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(240, 237, 232, 0.3);
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.scroll-hint svg { color: var(--accent); }

/* ===== MARQUEE BANNER ===== */
.marquee-banner {
  background: var(--bg-alt);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 16px 0;
  overflow: hidden;
}
.marquee-inner {
  display: flex; align-items: center;
}
.marquee-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  padding: 0 24px;
  white-space: nowrap;
  flex-shrink: 0;
}
.marquee-track { flex: 1; overflow: hidden; }
.marquee-items {
  display: inline-flex; gap: 32px;
  white-space: nowrap;
  animation: marquee 28s linear infinite;
}
.marquee-items span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--fg-dim);
}
.marquee-items span em { color: var(--fg-muted); font-style: normal; }
.marquee-items span::after { content: '●'; margin-left: 32px; color: var(--border); }
.marquee-items span:last-child::after { display: none; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== STATS SECTION ===== */
.stats-section {
  padding: 80px 48px;
  background: var(--bg);
}
.stats-inner { max-width: 1200px; margin: 0 auto; }
.stats-label {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
  color: var(--fg-muted);
}
.stats-headline {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--fg);
  margin-bottom: 12px;
}
.stats-headline em { font-style: italic; font-weight: 400; color: var(--fg-muted); }
.stats-sub {
  font-size: 0.95rem;
  color: var(--fg-muted);
  max-width: 55ch;
  margin: 0 auto 52px;
  line-height: 1.7;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat-card {
  background: var(--bg-alt);
  padding: 40px 36px;
  text-align: left;
}
.stat-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--fg);
  margin-bottom: 12px;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--fg-muted);
  line-height: 1.55;
}

/* ===== WHAT-YOU-GET ===== */
.what-you-get { padding: 96px 48px; background: var(--bg); }
.wyg-inner { max-width: 1200px; margin: 0 auto; }
.section-tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
  color: var(--fg-muted);
}
.section-tag-accent {
  border-color: rgba(217, 119, 6, 0.25);
  background: var(--accent-dim);
  color: var(--accent);
}
.section-headline {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--fg);
  margin-bottom: 56px;
}
.section-headline em { font-style: italic; font-weight: 400; color: var(--fg-muted); }

/* Feature sections — numbered */
.feature-sections { display: flex; flex-direction: column; gap: 0; }

.feature-block {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 0;
  border-top: 1px solid var(--border);
  padding: 64px 0;
}
.feature-block:last-child { border-bottom: 1px solid var(--border); }

.feature-num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  padding-right: 48px;
  padding-top: 4px;
}
.feature-content { padding-left: 48px; border-left: 1px solid var(--border); }
.feature-content h3 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--fg);
  margin-bottom: 12px;
}
.feature-content h3 em { font-style: italic; color: var(--fg-muted); }
.feature-content > p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.75;
  max-width: 60ch;
  margin-bottom: 40px;
}

/* Timeline block */
.timeline-block {
  margin-bottom: 40px;
}
.timeline-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-dim);
  margin-bottom: 16px;
}
.timeline-items {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}
.tl-year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  min-width: 36px;
  flex-shrink: 0;
}
.tl-text {
  font-size: 0.875rem;
  color: var(--fg-muted);
  line-height: 1.5;
}

/* Sub-cards grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.feature-card {
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.feature-card h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.78rem;
  color: var(--fg-dim);
  line-height: 1.55;
}

/* ===== WHY SECTION ===== */
.why-section { padding: 96px 48px; background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.why-inner { max-width: 1200px; margin: 0 auto; }
.why-statement { margin-bottom: 60px; }
.why-statement h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--fg);
  margin-top: 12px;
}
.why-statement h2 em { font-style: italic; color: var(--accent); }

/* Four point statements */
.why-points { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 64px; }
.why-point {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 24px 28px;
  font-size: 0.875rem;
  color: var(--fg-muted);
  line-height: 1.7;
}
.why-point strong { color: var(--fg); font-weight: 600; }
.why-point::before {
  content: '—';
  display: block;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 8px;
  font-size: 0.8rem;
}

/* Comparison table */
.comp-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 0;
}
.comp-table th {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
.comp-table th:first-child { padding-left: 0; }
.comp-table td {
  font-size: 0.875rem;
  color: var(--fg-muted);
  padding: 16px 16px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}
.comp-table td:first-child { padding-left: 0; }
.comp-table td strong { color: var(--fg); }
.comp-table tr:last-child td { border-bottom: none; }
.comp-check { color: var(--green); font-size: 1rem; }
.comp-cross { color: var(--fg-dim); }

/* ===== LIVING SECTION (demo) ===== */
.living-demo-section {
  padding: 96px 48px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.living-demo-inner { max-width: 1200px; margin: 0 auto; }
.living-demo-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.pulse-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
}
.living-demo-headline {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 8px;
}
.living-demo-sub {
  font-size: 0.9rem;
  color: var(--fg-muted);
  max-width: 52ch;
  line-height: 1.7;
  margin-bottom: 48px;
}

/* Demo panel */
.demo-panel {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 320px 1fr;
}
.demo-sidebar {
  border-right: 1px solid var(--border);
  padding: 28px 24px;
}
.demo-question-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-dim);
  margin-bottom: 10px;
}
.demo-question {
  font-size: 0.875rem;
  color: var(--fg);
  line-height: 1.5;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}
.consensus-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-dim);
  margin-bottom: 12px;
}
.consensus-bar {
  display: flex;
  height: 8px;
  border-radius: 99px;
  overflow: hidden;
  background: var(--border);
  margin-bottom: 16px;
}
.consensus-seg-support { background: var(--green); }
.consensus-seg-nuance { background: var(--accent); }
.consensus-seg-unclear { background: var(--border); }
.consensus-labels {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.consensus-lbl {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--fg-muted);
}
.consensus-lbl-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.dot-green { background: var(--green); }
.dot-amber { background: var(--accent); }
.dot-gray { background: var(--border); }

.demo-main { padding: 28px 32px; }
.demo-section-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 12px;
}
.demo-debate-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
.demo-debate-item {
  display: flex;
  gap: 10px;
  font-size: 0.78rem;
  line-height: 1.5;
}
.demo-debate-key {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 7px;
  background: var(--accent-dim);
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 2px;
}
.demo-debate-val { color: var(--fg-muted); }
.demo-papers-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border-light);
}
.demo-meta-item {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--fg-dim);
}
.demo-meta-item strong { color: var(--fg); }

/* ===== CLOSING SECTION ===== */
.closing-section {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 100px 48px;
  text-align: center;
}
.closing-inner { max-width: 760px; margin: 0 auto; }
.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--fg);
  margin-bottom: 16px;
}
.closing-headline em { font-style: italic; color: var(--fg-muted); }
.closing-sub {
  font-size: 1rem;
  color: var(--fg-muted);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.7;
}
.closing-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 40px;
}
.closing-footnote {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--fg-dim);
  margin-top: 20px;
}

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding: 40px 48px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-brand { display: flex; flex-direction: column; gap: 4px; }
.wordmark-footer {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg);
}
.footer-brand p {
  font-size: 0.8rem;
  color: var(--fg-dim);
}
.footer-note {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--fg-dim);
  text-align: right;
}

/* ===== APPROACH SECTION ===== */
.approach-section {
  padding: 96px 48px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.approach-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.approach-text h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.5vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--fg);
  margin: 12px 0 16px;
}
.approach-text h2 em { font-style: italic; color: var(--fg-muted); }
.approach-text p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.75;
  max-width: 50ch;
}
.approach-text p + p { margin-top: 12px; }
.approach-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--fg-muted);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 5px 12px;
  background: var(--bg-alt);
}
.approach-visual { display: flex; flex-direction: column; gap: 12px; }
.principle-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.principle-number {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding-top: 2px;
  flex-shrink: 0;
}
.principle-card h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 6px;
}
.principle-card p {
  font-size: 0.78rem;
  color: var(--fg-dim);
  line-height: 1.55;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { display: none; }
  .stats-grid { grid-template-columns: 1fr; }
  .feature-block { grid-template-columns: 1fr; }
  .feature-num { display: none; }
  .feature-content { padding-left: 0; border-left: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .why-points { grid-template-columns: 1fr; }
  .demo-panel { grid-template-columns: 1fr; }
  .demo-sidebar { border-right: none; border-bottom: 1px solid var(--border); }
}
@media (max-width: 640px) {
  .site-header { padding: 0 20px; }
  .hero-section { padding: 60px 20px 80px; }
  .stats-section, .what-you-get, .why-section,
  .living-demo-section, .closing-section { padding: 56px 20px; }
  .feature-block { padding: 40px 0; }
  footer { padding: 32px 20px; }
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
  .footer-note { text-align: center; }
  .site-header nav { gap: 16px; }
}