/* ============================================================
   LAYOUT.CSS — Grid Systems, Section Patterns, Responsive
   ============================================================ */

/* --- NAVIGATION --- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--cream);
  transition: box-shadow var(--transition);
}
.nav.scrolled { box-shadow: 0 2px 20px rgba(26,21,16,0.08); }
.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 48px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: -0.5px;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav__logo-dot { color: var(--accent); }
.nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--mid);
  transition: color var(--transition);
}
.nav__link:hover { color: var(--ink); }
.nav__link.active { color: var(--ink); font-weight: 600; }
.nav__actions { display: flex; align-items: center; gap: 16px; }
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}
.nav__hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--ink);
  transition: all var(--transition);
}

/* Mobile Nav Overlay */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: var(--cream);
  z-index: 99;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.nav-overlay.open { opacity: 1; pointer-events: all; }
.nav-overlay__link {
  font-family: var(--font-display);
  font-size: 32px;
  color: var(--ink);
}

/* --- HERO GRID --- */
.hero {
  padding-top: calc(68px + 80px);
  padding-bottom: 80px;
  padding-left: 48px;
  padding-right: 48px;
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  min-height: calc(100vh - 68px);
}
.hero__right {
  background: var(--ink);
  border-radius: var(--radius-md);
  padding: 32px;
  min-height: 420px;
}

/* --- TICKER --- */
.ticker-section {
  background: var(--accent);
  overflow: hidden;
  padding: 18px 0;
  white-space: nowrap;
}
.ticker-track {
  display: inline-flex;
  animation: ticker 30s linear infinite;
}
.ticker-track:hover { animation-play-state: paused; }
.ticker-item {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--cream);
  padding: 0 32px;
}
.ticker-item::after { content: ' ★ '; color: rgba(247,243,237,0.5); }
@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* --- CARDS GRID --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(220px, 100%), 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.cards-grid .who-card { border: none; border-radius: 0; }

/* --- DEMO GRID --- */
.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(340px, 100%), 1fr));
  gap: 24px;
  margin-top: 48px;
}

/* --- STATS STRIP --- */
.stats-strip {
  background: var(--warm);
  padding: 56px 48px;
}
.stats-strip__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px;
  text-align: center;
}
.stat__number {
  font-family: var(--font-display);
  font-size: clamp(36px, 4vw, 56px);
  color: var(--cream);
  line-height: 1;
  margin-bottom: 8px;
}
.stat__label {
  font-size: 14px;
  color: rgba(247,243,237,0.8);
  line-height: 1.4;
}

/* --- TWO-COLUMN SPLIT --- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.split--wide { grid-template-columns: 2fr 3fr; }
.split--narrow { grid-template-columns: 280px 1fr; }

/* --- USE CASES LAYOUT --- */
.use-cases-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 64px;
  align-items: start;
}
.category-sidebar { position: sticky; top: 88px; }
.category-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--mid);
  transition: all var(--transition);
  text-align: left;
  margin-bottom: 4px;
}
.category-btn:hover { background: var(--light); color: var(--ink); }
.category-btn.active { background: var(--accent); color: var(--cream); font-weight: 600; }
.category-btn__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  opacity: 0.6;
}

/* --- TAB FILTER --- */
.tab-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.tab-btn {
  font-size: 13px;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: 100px;
  border: 1.5px solid var(--rule);
  color: var(--mid);
  background: transparent;
  transition: all var(--transition);
}
.tab-btn:hover { border-color: var(--ink); color: var(--ink); }
.tab-btn.active { background: var(--ink); border-color: var(--ink); color: var(--cream); }
.section--dark .tab-btn { border-color: #3a3028; color: rgba(247,243,237,0.5); }
.section--dark .tab-btn:hover,
.section--dark .tab-btn.active { background: var(--warm); border-color: var(--warm); color: var(--cream); }

/* --- PROGRESS BAR --- */
.progress-bar {
  height: 4px;
  background: var(--rule);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 8px;
}
.progress-bar__fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.4s ease;
}

/* --- FOOTER --- */
.footer {
  background: var(--ink);
  color: var(--cream);
  padding: 64px 48px 40px;
}
.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(247,243,237,0.1);
}
.footer__logo {
  font-family: var(--font-display);
  font-size: 28px;
  margin-bottom: 12px;
}
.footer__tagline { font-size: 14px; color: rgba(247,243,237,0.5); }
.footer__links { display: flex; gap: 64px; }
.footer__col-title {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(247,243,237,0.4);
  font-family: var(--font-mono);
  margin-bottom: 16px;
}
.footer__col-link {
  display: block;
  font-size: 14px;
  color: rgba(247,243,237,0.6);
  margin-bottom: 10px;
  transition: color var(--transition);
}
.footer__col-link:hover { color: var(--cream); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: rgba(247,243,237,0.3);
}
.footer__disclaimer { max-width: 600px; line-height: 1.6; }

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
  .nav__inner  { padding: 0 24px; }
  .hero        { padding: 120px 24px 64px; gap: 48px; }
  .split       { gap: 48px; }
  .stats-strip__inner { grid-template-columns: repeat(2,1fr); gap: 32px; }
  .footer__links { gap: 32px; }
}
@media (max-width: 768px) {
  .nav__links  { display: none; }
  .nav__actions .btn-nav { display: none; }
  .nav__hamburger { display: flex; }
  .hero        { grid-template-columns: 1fr; min-height: auto; padding-top: 100px; }
  .hero__right { display: none; }
  .split       { grid-template-columns: 1fr; gap: 32px; }
  .split--narrow { grid-template-columns: 1fr; }
  .use-cases-layout { grid-template-columns: 1fr; }
  .category-sidebar { position: static; display: flex; flex-wrap: wrap; gap: 8px; }
  .category-btn { width: auto; flex: 0 0 auto; }
  .stats-strip { padding: 48px 20px; }
  .demo-grid   { grid-template-columns: 1fr; }
  .footer__top { flex-direction: column; gap: 40px; }
  .footer__links { flex-wrap: wrap; gap: 32px; }
  .footer__bottom { flex-direction: column; gap: 16px; text-align: center; }
}
@media (max-width: 480px) {
  .cards-grid  { grid-template-columns: 1fr 1fr; }
  .stats-strip__inner { grid-template-columns: 1fr 1fr; }
  .tab-filter  { gap: 6px; }
  .tab-btn     { font-size: 12px; padding: 6px 14px; }
}