/* ══════════════════════════════════════
   SupaLab — Shared Design System
   ══════════════════════════════════════ */

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

:root {
  --bg:    #F5F5F7;
  --bg2:   #F9F9FB;
  --bg3:   #F3F3F3;
  --bg4:   #EAEAEB;
  --white: #FFFFFF;
  --brand: #E8175D;
  --t1: #1D1D1F;
  --t2: #6E6E73;
  --t3: #8E8E93;
  --border-color: #AAABB1;
  --border: 1px solid #AAABB1;
  --border-light: 1px solid #EAEAEB;
  --font: 'Manrope', system-ui, sans-serif;
  --font-logo: 'Funnel Display', system-ui, sans-serif;
  --max: 1160px;
  --r: 16px;
  --r-btn: 8px;
}

html { -webkit-font-smoothing: antialiased; overflow-x: hidden; }
body { font-family: var(--font); background: var(--bg); color: var(--t1); font-size: 18px; font-weight: 500; line-height: 1.6; overflow-x: hidden; }
.wrap { max-width: var(--max); margin: 0 auto; }

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 56px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem;
  background: rgba(245,245,247,0.88);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid #EAEAEB;
}
.nav-logo { display: flex; align-items: center; text-decoration: none; }
.nav-logo img { display: block; }
.nav-links { display: flex; align-items: center; gap: 0.1rem; list-style: none; }
.nav-item { position: relative; }
.nav-item > a {
  font-size: 0.875rem; font-weight: 600; color: var(--t2);
  text-decoration: none; padding: 0.4rem 0.8rem; border-radius: 6px;
  transition: color 0.12s; display: flex; align-items: center; gap: 0.25rem;
}
.nav-item > a:hover { color: var(--t1); }
.nav-arrow { width: 0; height: 0; border-left: 3.5px solid transparent; border-right: 3.5px solid transparent; border-top: 3.5px solid currentColor; transition: transform 0.18s; }
.nav-item:hover .nav-arrow { transform: rotate(180deg); }
.nav-dropdown {
  position: absolute; top: calc(100% + 8px); left: 50%;
  transform: translateX(-50%) translateY(6px);
  background: var(--white); border: 1px solid #EAEAEB;
  border-radius: 12px; padding: 0.35rem; min-width: 230px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
  opacity: 0; visibility: hidden;
  transition: opacity 0.18s, transform 0.18s, visibility 0.18s; z-index: 200;
}
.nav-item:hover .nav-dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav-dropdown a { display: block; padding: 0.5rem 0.7rem; border-radius: 8px; text-decoration: none; }
.nav-dropdown a:hover { background: var(--bg); }
.dd-title { display: block; font-size: 0.85rem; font-weight: 600; color: var(--t1); }
.dd-desc  { display: block; font-size: 0.75rem; font-weight: 500; color: var(--t3); margin-top: 0.1rem; }
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-login {
  font-size: 0.875rem; font-weight: 600; color: var(--t2);
  text-decoration: none; padding: 0.43rem 0.8rem;
  border-radius: var(--r-btn);
  transition: color 0.12s;
}
.nav-login:hover { color: var(--t1); }
.nav-demo {
  font-size: 0.875rem; font-weight: 600; color: var(--t1);
  text-decoration: none; padding: 0.43rem 1rem;
  border: 1.5px solid var(--border-color); border-radius: var(--r-btn);
  transition: border-color 0.18s;
}
.nav-demo:hover { border-color: #7E7E88; }
.nav-cta {
  font-size: 0.875rem; font-weight: 600; color: var(--t1);
  text-decoration: none; padding: 0.43rem 1.1rem;
  border: 1.5px solid var(--border-color); border-radius: var(--r-btn);
  transition: border-color 0.18s;
}
.nav-cta:hover { border-color: #7E7E88; }

/* ── SHARED SECTION STYLES ── */
.divider { height: 1px; background: #EAEAEB; }
.sect-label { display: flex; align-items: center; justify-content: center; gap: 0.45rem; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--t2); margin-bottom: 1rem; }
.sect-label::before, .sect-label::after { content: ''; width: 20px; height: 1px; background: #EAEAEB; }
.sect-title { text-align: center; font-size: clamp(1.75rem, 3.5vw, 2.5rem); font-weight: 700; letter-spacing: -0.025em; line-height: 1.2; color: var(--t1); max-width: 600px; margin: 0 auto 1rem; }
.sect-sub { text-align: center; font-size: 1.125rem; font-weight: 500; color: var(--t2); max-width: 700px; margin: 0 auto 3.5rem; line-height: 1.7; }

/* ── SHARED BUTTONS ── */
.btn-primary { font-family: var(--font); font-size: 0.95rem; font-weight: 600; color: var(--t1); background: transparent; padding: 0.63rem 1.4rem; border-radius: var(--r-btn); border: 1.5px solid var(--border-color); cursor: pointer; text-decoration: none; transition: border-color 0.12s; display: inline-block; }
.btn-primary:hover { border-color: #626272; }
.btn-secondary { font-family: var(--font); font-size: 0.95rem; font-weight: 500; color: var(--t2); background: transparent; padding: 0.63rem 1.4rem; border-radius: var(--r-btn); border: 1px solid #EAEAEB; cursor: pointer; text-decoration: none; transition: border-color 0.12s, color 0.12s; display: inline-block; }
.btn-secondary:hover { border-color: var(--border-color); color: var(--t1); }

/* ── SHARED ACCENTS ── */
.pain-quote {
  font-size: clamp(1.25rem, 1.8vw, 1.5rem); font-weight: 700;
  color: var(--t1); line-height: 1.35; letter-spacing: -0.02em;
  padding-left: 1rem; border-left: 3px solid var(--brand);
  margin-bottom: 1.75rem;
}

/* ── FOOTER ── */
footer { background: #1D1D1F; color: rgba(255,255,255,0.5); padding: 4rem 2rem 2.5rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 2.5rem; max-width: var(--max); margin: 0 auto 3rem; }
.footer-logo { font-family: 'Space Grotesk', system-ui, sans-serif; font-size: 1.3rem; font-weight: 800; letter-spacing: -0.03em; color: rgba(255,255,255,0.9); text-decoration: none; display: block; margin-bottom: 0.75rem; }
.footer-logo .logo-bar, .footer-logo .logo-dot { color: var(--brand); }
.footer-brand p { color: rgba(255,255,255,0.35); font-size: 0.9rem; font-weight: 500; line-height: 1.65; }
.footer-col h4, .footer-col .footer-heading { color: rgba(255,255,255,0.85); font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 1rem; }
.footer-col a { display: block; color: rgba(255,255,255,0.45); text-decoration: none; font-size: 0.9rem; font-weight: 500; margin-bottom: 0.55rem; transition: color 0.15s; }
.footer-col a:hover { color: rgba(255,255,255,0.85); }
.footer-bottom { max-width: var(--max); margin: 0 auto; border-top: 1px solid rgba(255,255,255,0.08); padding-top: 2rem; display: flex; justify-content: space-between; align-items: center; font-size: 0.85rem; font-weight: 500; }

/* ══════════════════════════════════════
   RESPONSIVE — Tablet (≤768px)
   ══════════════════════════════════════ */
@media (max-width: 768px) {
  body { font-size: 16px; }

  /* Nav */
  nav { padding: 0 1rem; }
  .nav-links { display: none; }
  .nav-login { display: none; }

  /* Shared sections */
  .sect-sub { font-size: 1rem; margin-bottom: 2.5rem; }

  /* Hero */
  .hero { padding: 5rem 1.5rem 3rem; min-height: auto; }
  .hero h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); }
  .hero-sub { font-size: 1.125rem; margin-bottom: 2rem; }
  .hero-pills { gap: 0.5rem; }
  .hero-pill { font-size: 0.8125rem; padding: 0.35rem 0.75rem 0.35rem 0.55rem; }
  .hero-ui-wrap { margin-top: 2.5rem; }
  .win-body { grid-template-columns: 1fr; height: auto; }
  .win-sidebar { display: none; }
  .win-main { padding: 0.85rem; }
  .chat { gap: 0.65rem; }

  /* Hero split */
  .hero.hero--split { padding: 5rem 1.5rem 3rem; }
  .hero-split { grid-template-columns: 1fr; gap: 2rem; }
  .hero-left { align-items: center; }
  .hero-left h1, .hero-left .hero-sub, .hero-left .hero-note { text-align: center !important; }
  .hero-left .hero-pills { align-items: center; }
  .hero-left .hero-btns { justify-content: center; }
  .hero--split .hero-pills { align-items: center; }
  .hero--split .hero-sub { border-left: none; padding-left: 0; text-align: center !important; }

  /* Video tour */
  .vt-slide { flex-direction: column; padding: 1.5rem; gap: 1.5rem; }
  .vt-slide-text { flex: none; width: 100%; }
  .vt-slide-img { width: 100%; }
  .vt-stage { min-height: 300px; }
  .vt-player { border-radius: 14px; }

  /* Biz network visual */
  .biz-net-row-teams { flex-wrap: wrap; gap: 0.5rem; }
  .biz-net-share { display: none; }
  .biz-net-conn { gap: 2rem; }
  .biz-net-conn-ext { gap: 3rem; }
  .biz-net-row { flex-wrap: wrap; gap: 0.5rem; justify-content: center; }

  /* Pain points */
  .pain { padding: 4rem 1.5rem; }
  .pain-tabs { flex-wrap: wrap; justify-content: center; width: auto; }
  .pain-panel, .pain-panel.active { grid-template-columns: 1fr; gap: 2rem; }

  /* Data-first */
  .data-first { padding: 3rem 1.5rem; }
  .data-first-compare { grid-template-columns: 1fr; }

  /* Comparison */
  .compare { padding: 4rem 1.5rem; }
  .compare-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }

  /* Segments */
  .segments { padding: 4rem 1.5rem; }
  .seg-grid { grid-template-columns: repeat(2, 1fr); }

  /* Trust */
  .trust { padding: 4rem 1.5rem; }
  .trust-stats { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .trust-note { padding: 1.5rem; }

  /* ROI */
  .roi { padding: 4rem 1.5rem; }
  .roi-grid { grid-template-columns: 1fr; gap: 1rem; }
  .roi-summary { padding: 1.25rem 1.5rem; }

  /* CTA */
  .cta { padding: 4rem 1.5rem; }

  /* FAQ */
  .faq { padding: 4rem 1.5rem; }
  .faq-tabs { width: auto; }

  /* SC API */
  .sc-api { padding: 3rem 1.5rem; }
  .sc-actions { flex-direction: column; }
  .sc-btn { text-align: center; }

  /* Footer */
  footer { padding: 3rem 1.5rem 2rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; margin-bottom: 2rem; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }

  /* Scenarios */
  .scenarios { padding: 4rem 1.5rem; }
  .sc-tabs { width: 100%; justify-content: center; }
  .sc-panel, .sc-panel.active { grid-template-columns: 1fr; gap: 2rem; }
  .sc-mock-sidebar { width: 110px; }

  /* Use cases */
  .use-cases { padding: 4rem 1.5rem; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }

  /* For business */
  .for-biz { padding: 2rem 1.5rem 4rem; }
  .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .biz-network { padding: 2rem; }
  .biz-network-inner { grid-template-columns: 1fr; gap: 2rem; }
  .biz-network-visual { transform: none; }

  /* How to try */
  .how-try { padding: 4rem 1.5rem; }
  .try-steps { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
  .try-arrow { display: none; }
  .try-note { flex-direction: column; gap: 1rem; }

  /* How to start */
  .how-start { padding: 4rem 1.5rem; }
  .how-steps { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .how-arrow { display: none; }

  /* No hallucination */
  .no-halluc { padding: 2.5rem 1.5rem; }
  .no-halluc-inner { flex-direction: column; gap: 2rem; }

  /* Accuracy */
  .accuracy-bar { padding: 2.5rem 1.5rem; }
  .accuracy-inner { gap: 2rem; flex-wrap: wrap; justify-content: center; }
  .accuracy-num { font-size: 2.5rem; }

  /* Formats */
  .formats { padding: 2.5rem 1.5rem; }
  .formats-bar { overflow-x: auto; -webkit-overflow-scrolling: touch; }

  /* Features */
  .features { padding: 4rem 1.5rem; }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }

  /* Products */
  .products { padding: 4rem 1.5rem 1rem; }
  .product-row { padding: 3rem 1.5rem; }
  .pr-inner { grid-template-columns: 1fr; gap: 2rem; }
  .pr-inner.rev .pr-info { order: 1; }
  .pr-inner.rev .pr-visual { order: 2; }

  /* Problem/Solution */
  .ps { padding: 4rem 1.5rem; }
  .ps-grid { grid-template-columns: 1fr; gap: 1rem; }

  /* Logos */
  .logos-row { gap: 2rem; flex-wrap: wrap; }
}

/* ══════════════════════════════════════
   RESPONSIVE — Mobile (≤480px)
   ══════════════════════════════════════ */
@media (max-width: 480px) {
  nav { height: 52px; }
  .nav-cta { display: none; }

  /* Hero */
  .hero { padding: 4rem 1rem 2.5rem; }
  .hero.hero--split { padding: 4rem 1rem 2.5rem; }
  .hero h1 { font-size: clamp(1.5rem, 7vw, 2rem); }
  .hero--split h1 { font-size: clamp(1.5rem, 6vw, 1.75rem) !important; }
  .hero-sub { font-size: 1rem; }
  .hero--split .hero-sub { font-size: 0.9375rem !important; }
  .hero-btns { flex-direction: column; align-items: center; gap: 0.5rem; }
  .hero-btns .btn-primary,
  .hero-btns .btn-secondary { width: 100%; text-align: center; }
  .hero-pills { flex-direction: column; align-items: center; }
  .hero-ui { border-radius: 14px; }
  .hero-overlay { border-radius: 14px; }
  .win-chrome { padding: 0.6rem 0.8rem; }
  .chat-input { padding: 0.5rem 0.7rem; }

  /* Video tour */
  .vt-slide { padding: 1.25rem 1rem; gap: 1rem; }
  .vt-stage { min-height: auto; }
  .vt-slide-text h3 { font-size: 1.125rem !important; }
  .vt-preview { border-radius: 12px; }
  .vt-preview-play-btn { width: 48px; height: 48px; }
  .vt-preview-play-btn svg { width: 20px; height: 20px; }

  /* Biz network */
  .biz-network-visual { transform: none; }

  /* Pain points */
  .pain { padding: 3rem 1rem; }
  .pain-tabs { padding: 3px; gap: 2px; }
  .pain-tab { font-size: 0.8125rem; padding: 0.45rem 0.85rem; }
  .pain-docs-card { font-size: 0.875rem; }

  /* Data-first */
  .data-first { padding: 2.5rem 1rem; }
  .df-card { padding: 1rem 1.25rem; }

  /* Comparison */
  .compare { padding: 3rem 1rem; }
  .compare-table { font-size: 0.8125rem; }
  .compare-table th,
  .compare-table td { padding: 0.6rem 0.65rem; }

  /* Footer */
  footer { padding: 2.5rem 1rem 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }

  /* Scenarios */
  .scenarios { padding: 3rem 1rem; }
  .sc-visual { flex-direction: column; }
  .sc-mock-sidebar {
    width: 100%; border-right: none; border-bottom: 1px solid #EAEAEB;
    flex-direction: row; overflow-x: auto; -webkit-overflow-scrolling: touch;
  }
  .sc-mock-sidebar-nav { display: none; }
  .sc-tabs { flex-wrap: wrap; width: auto; }
  .sc-tab { font-size: 0.8125rem; padding: 0.5rem 1rem; }

  /* Use cases */
  .use-cases { padding: 3rem 1rem; }
  .cases-grid { grid-template-columns: 1fr; }

  /* For business */
  .for-biz { padding: 1.5rem 1rem 3rem; }
  .biz-grid { grid-template-columns: 1fr; }
  .biz-network { padding: 1.5rem; }
  .biz-net-node { padding: 0.4rem 0.6rem; }
  .biz-net-label { font-size: 0.7rem; }
  .biz-network-visual { transform: scale(0.6); transform-origin: center top; }

  /* How to try */
  .how-try { padding: 3rem 1rem; }
  .try-steps { grid-template-columns: 1fr; }

  /* How to start */
  .how-start { padding: 3rem 1rem; }
  .how-steps { grid-template-columns: 1fr; gap: 1rem; }

  /* No hallucination */
  .no-halluc { padding: 2rem 1rem; }
  .no-halluc-num { font-size: 2.25rem; }

  /* Accuracy */
  .accuracy-inner { flex-direction: column; gap: 1.5rem; }
  .accuracy-divider { display: none; }
  .accuracy-num { font-size: 2.25rem; }

  /* Formats */
  .formats { padding: 2rem 1rem; }

  /* Features */
  .features { padding: 3rem 1rem; }
  .feat-grid { grid-template-columns: 1fr; }

  /* Products */
  .products { padding: 3rem 1rem 1rem; }
  .product-row { padding: 2.5rem 1rem; }

  /* Segments */
  .segments { padding: 3rem 1rem; }
  .seg-grid { grid-template-columns: 1fr; }

  /* Trust */
  .trust { padding: 3rem 1rem; }
  .trust-stats { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .trust-num { font-size: 2rem; }
  .trust-note { padding: 1.25rem; }
  .trust-note p { font-size: 0.9375rem; }

  /* ROI */
  .roi { padding: 3rem 1rem; }
  .roi-summary { font-size: 1rem; padding: 1rem 1.25rem; }

  /* CTA */
  .cta { padding: 3rem 1rem; }
  .cta-btns { flex-direction: column; align-items: center; }
  .btn-cta-primary,
  .btn-cta-secondary { width: 100%; text-align: center; }

  /* FAQ */
  .faq { padding: 3rem 1rem; }
  .faq-tabs { padding: 3px; gap: 2px; }
  .faq-tab { font-size: 0.8rem; padding: 0.4rem 0.75rem; }

  /* SC API */
  .sc-api { padding: 2.5rem 1rem; }
  .sc-api h3 { font-size: 1.2rem; }

  /* Problem/Solution */
  .ps { padding: 3rem 1rem; }

  /* Logos */
  .logos-row { gap: 1.5rem; }
  .logo-placeholder { font-size: 0.95rem; }

  /* Promise */
  .promise { padding: 3rem 1rem; }
  .promise-dots { gap: 0.4rem; }
  .promise-dot-item { font-size: 0.9375rem; padding: 0.35rem 0.75rem 0.35rem 0.55rem; }
}