/* ═══════════════════════════════════════════════════════════════════════════
   Aerodrop — style.css
   Editorial / magazine aesthetic. Typography-first. No templates.
   ═══════════════════════════════════════════════════════════════════════════ */

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

:root {
  --bg: #FAFAFA;
  --fg: #0F172A;
  --muted: #475569;
  --subtle: #93A1B2;
  --rule: #E2E8F0;
  --primary: #1350D4;
  --primary-hover: #0F43B4;
  --secondary: #18A5EA;
  --surface: #FFFFFF;
  --dark: #0B1020;
  --dark-text: #E2E8F0;
  --dark-muted: #94A3B8;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', monospace;

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.76, 0, 0.24, 1);
}

html {
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-smooth [data-lenis-prevent] { overscroll-behavior: contain; }

body {
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  cursor: default;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

::selection {
  background: var(--primary);
  color: #fff;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { cursor: pointer; }

/* ── Grid & Utilities ──────────────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 clamp(24px, 6vw, 120px);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}

/* ── Custom Cursor Dot ─────────────────────────────────────────────────── */

.cursor-dot {
  position: fixed;
  top: 0; left: 0;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--primary);
  pointer-events: none;
  z-index: 9999;
  mix-blend-mode: difference;
  transform: translate(-50%, -50%);
  transition: width 0.3s var(--ease-out-expo),
              height 0.3s var(--ease-out-expo),
              background 0.3s;
  will-change: transform;
}

.cursor-dot.is-hovering {
  width: 48px; height: 48px;
  background: rgba(19, 80, 212, 0.15);
  mix-blend-mode: normal;
}

@media (pointer: coarse) { .cursor-dot { display: none; } }

/* ── Nav ────────────────────────────────────────────────────────────────── */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  pointer-events: none;
}

.nav-background {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 110px;
  z-index: -1;
  pointer-events: none;
  transition: opacity 0.4s;
  opacity: 0;
  
  /* Progressive mask to smoothly fade the backdrop blur filter itself */
  mask-image: linear-gradient(
    to bottom,
    black 0%,
    black 55%,
    transparent 100%
  );
  -webkit-mask-image: linear-gradient(
    to bottom,
    black 0%,
    black 55%,
    transparent 100%
  );
}

.nav.is-scrolled .nav-background {
  opacity: 1;
}

.nav-background-blur {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(
    to bottom,
    rgba(250, 250, 250, 1) 0%,
    rgba(250, 250, 250, 0.95) 55%,
    rgba(250, 250, 250, 0) 100%
  );
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px clamp(24px, 6vw, 120px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s, background 0.4s, padding 0.4s;
  pointer-events: auto;
}

.nav.is-scrolled .nav-inner {
  padding: 16px clamp(24px, 6vw, 120px);
}

.nav-logo {
  height: 28px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  gap: 40px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  display: inline-block;
  padding: 8px 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: -0.01em;
  transition: color 0.25s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1.5px;
  background: var(--fg);
  transition: width 0.35s var(--ease-out-expo);
}

.nav-links a:hover { color: var(--fg); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  font-size: 13px;
  font-weight: 600;
  color: var(--bg) !important;
  background: var(--fg);
  padding: 10px 24px;
  border: none;
  transition: background 0.25s, transform 0.25s;
}

.nav-cta::after { display: none; }

.nav-cta:hover {
  background: var(--primary);
  transform: translateY(-1px);
}

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none; border: none;
  width: 32px; height: 32px;
  position: relative;
  pointer-events: auto;
}

.nav-toggle span {
  display: block;
  width: 20px; height: 1.5px;
  background: var(--fg);
  position: absolute; left: 6px;
  transition: transform 0.3s var(--ease-out-expo), opacity 0.2s;
}
.nav-toggle span:nth-child(1) { top: 11px; }
.nav-toggle span:nth-child(2) { top: 16px; }
.nav-toggle span:nth-child(3) { top: 21px; }

.nav-toggle.is-open span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
    background: var(--bg);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s;
    z-index: 99;
  }
  .nav-links.is-open {
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a {
    font-size: 24px;
    font-weight: 600;
    color: var(--fg);
  }
  .nav-cta {
    font-size: 18px;
    padding: 14px 40px;
  }
}

/* ── Hero ───────────────────────────────────────────────────────────────── */

.hero {
  min-height: 100svh;
  display: grid;
  grid-template-rows: 1fr auto;
  padding-top: 120px;
  padding-bottom: 48px;
  position: relative;
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(24px, 4vw, 48px);
}

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--primary);
  opacity: 0;
  transform: translateY(20px);
}

.hero-headline {
  font-size: clamp(44px, 9vw, 140px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--fg);
  max-width: 12ch;
}

.hero-headline .line {
  display: block;
  overflow: hidden;
}

.hero-headline .line-inner {
  display: block;
  transform: translateY(115%);
  will-change: transform;
}

/* Thin accent line between hero words */
.hero-headline .accent-word {
  color: var(--primary);
}

.hero-sub {
  font-size: clamp(16px, 1.6vw, 20px);
  font-weight: 400;
  line-height: 1.6;
  color: var(--muted);
  max-width: 38ch;
  letter-spacing: -0.01em;
}

.hero-sub .line {
  display: block;
  overflow: hidden;
}

.hero-sub .line-inner {
  display: block;
  transform: translateY(115%);
  will-change: transform;
}

.hero-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  opacity: 0;
}

.scroll-indicator span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--subtle);
  writing-mode: vertical-lr;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: var(--rule);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary);
  animation: scroll-drop 2.5s var(--ease-in-out) infinite;
}

@keyframes scroll-drop {
  0% { top: -100%; }
  40% { top: 0; }
  60% { top: 0; }
  100% { top: 100%; }
}

.hero-stamp {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--subtle);
  text-align: right;
  line-height: 1.6;
  opacity: 0;
}

/* ── Horizontal Divider ────────────────────────────────────────────────── */

.divider {
  height: 1px;
  background: var(--rule);
  margin: 0 clamp(24px, 6vw, 120px);
}

/* ── How It Works — Horizontal Scroll ──────────────────────────────────── */

.how-section {
  padding: 0;
  overflow: hidden;
}

.how-header {
  padding: clamp(80px, 12vh, 160px) clamp(24px, 6vw, 120px) clamp(40px, 6vh, 80px);
}

.how-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--subtle);
  margin-bottom: 20px;
}

.how-title {
  font-size: clamp(28px, 4.5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
  max-width: 14ch;
}

.how-track-wrapper {
  overflow: hidden;
}

.how-track {
  display: flex;
  gap: 0;
  will-change: transform;
}

.how-panel {
  flex: 0 0 auto;
  width: clamp(320px, 40vw, 500px);
  padding: clamp(40px, 6vh, 80px) clamp(32px, 4vw, 60px);
  border-left: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 50vh;
}

.how-panel:first-child { border-left: none; }

.how-panel-number {
  font-family: var(--mono);
  font-size: 80px;
  font-weight: 700;
  line-height: 1;
  color: var(--rule);
  letter-spacing: -0.04em;
  margin-bottom: 40px;
  transition: color 0.6s var(--ease-out-expo);
}

.how-panel.is-active .how-panel-number { color: var(--primary); }

.how-panel-content { flex: 1; display: flex; flex-direction: column; gap: 16px; }

.how-panel-title {
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.how-panel-body {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 36ch;
}

.how-panel-icon {
  margin-top: auto;
  padding-top: 32px;
  font-size: 32px;
  opacity: 0.3;
}

/* ── Custody Chain (inline horizontal) ─────────────────────────────────── */

.chain-section {
  padding: clamp(80px, 12vh, 160px) 0;
  background: var(--dark);
  color: var(--dark-text);
  overflow: hidden;
}

.chain-section .container {
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 8vh, 96px);
}

.chain-header-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: end;
}

.chain-heading {
  font-size: clamp(28px, 4.5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.chain-heading em {
  font-style: normal;
  color: var(--secondary);
}

.chain-subtext {
  font-size: 15px;
  line-height: 1.7;
  color: var(--dark-muted);
  max-width: 38ch;
}

.chain-visual {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  padding: 20px 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.chain-visual::-webkit-scrollbar { display: none; }

.chain-node {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  min-width: 100px;
  opacity: 0;
  transform: translateY(20px);
}

.chain-node.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s var(--ease-out-expo),
              transform 0.6s var(--ease-out-expo);
}

.chain-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid var(--dark-muted);
  background: transparent;
  position: relative;
  z-index: 2;
  transition: border-color 0.4s, background 0.4s, box-shadow 0.4s;
}

.chain-node.is-active .chain-dot {
  border-color: var(--secondary);
  background: var(--secondary);
  box-shadow: 0 0 20px rgba(24, 165, 234, 0.3);
}

.chain-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-align: center;
  color: var(--dark-text);
}

.chain-detail {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--dark-muted);
  text-align: center;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.chain-connector {
  flex: 0 0 auto;
  width: clamp(40px, 6vw, 80px);
  display: flex;
  align-items: center;
  position: relative;
}

.chain-connector-line {
  width: 100%;
  height: 1px;
  background: rgba(148, 163, 184, 0.2);
  position: relative;
  overflow: hidden;
}

.chain-connector-line::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 100%;
  background: var(--secondary);
  transition: width 0.8s var(--ease-out-expo);
}

.chain-connector.is-connected .chain-connector-line::after {
  width: 100%;
}

.chain-footnote {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dark-muted);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 12px;
}

.chain-footnote .pulse-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #16A34A;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ── Statement ─────────────────────────────────────────────────────────── */

.statement {
  padding: clamp(100px, 16vh, 200px) 0;
}

.statement-text {
  font-size: clamp(28px, 5vw, 72px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
  max-width: 18ch;
}

.statement-text em {
  font-style: normal;
  color: var(--primary);
}

/* ── Live Ticker ───────────────────────────────────────────────────────── */

.ticker-section {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
  padding: 0;
  background: var(--surface);
}

.ticker-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--subtle);
  padding: 16px clamp(24px, 6vw, 120px);
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
  gap: 8px;
}

.ticker-label .live-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #16A34A;
  animation: pulse 2s ease-in-out infinite;
}

.ticker {
  overflow: hidden;
}

.ticker-track {
  display: flex;
  width: max-content;
  animation: ticker-scroll 50s linear infinite;
}

.ticker-track:hover {
  animation-play-state: paused;
}

@keyframes ticker-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.ticker-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 40px;
  border-right: 1px solid var(--rule);
  white-space: nowrap;
  flex-shrink: 0;
}

.ticker-route {
  font-family: var(--mono);
  font-size: clamp(14px, 1.5vw, 18px);
  font-weight: 600;
  color: var(--fg);
  letter-spacing: 0.04em;
}

.ticker-route .arrow {
  color: var(--subtle);
  margin: 0 6px;
  font-weight: 300;
}

.ticker-status {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ticker-status[data-status="in-flight"]  { color: var(--primary); }
.ticker-status[data-status="delivered"]  { color: #16A34A; }
.ticker-status[data-status="picked-up"]  { color: var(--secondary); }
.ticker-status[data-status="at-hub"]     { color: #D97706; }

.ticker-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--subtle);
}

/* ── Routes ─────────────────────────────────────────────────────────────── */

.routes-section {
  padding: clamp(80px, 12vh, 160px) 0;
}

.routes-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: clamp(40px, 6vh, 80px);
  gap: 24px;
}

.routes-header h2 {
  font-size: clamp(28px, 4.5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.routes-header p {
  font-size: 13px;
  color: var(--muted);
  text-align: right;
  max-width: 280px;
  line-height: 1.5;
}

.route-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 32px 0;
  border-top: 1px solid var(--rule);
  opacity: 0;
  transform: translateY(16px);
}

.route-row.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s var(--ease-out-expo),
              transform 0.6s var(--ease-out-expo);
}

.route-row:last-child {
  border-bottom: 1px solid var(--rule);
}

.route-city {
  font-size: clamp(20px, 3vw, 36px);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.route-code {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
  letter-spacing: 0.08em;
}

.route-arrow {
  font-size: 18px;
  color: var(--muted);
  transition: color 0.3s;
}

.route-row:hover .route-arrow { color: var(--primary); }

.route-meta {
  text-align: right;
}

.route-tag {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.route-tag.live { color: #16A34A; }
.route-tag.soon { color: var(--muted); }

.route-airport {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
  line-height: 1.4;
}

@media (max-width: 768px) {
  .route-row { grid-template-columns: 1fr auto 1fr; }
  .route-meta { display: none; }
  .routes-header { flex-direction: column; align-items: flex-start; }
  .routes-header p { text-align: left; }
}

/* ── FAQ ────────────────────────────────────────────────────────────────── */

.faq-section {
  padding: clamp(80px, 12vh, 160px) 0;
  border-top: 1px solid var(--rule);
}

.faq-layout {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: clamp(40px, 8vw, 120px);
  align-items: start;
}

.faq-left h2 {
  font-size: clamp(28px, 4.5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  position: sticky;
  top: 120px;
}

.faq-item {
  border-top: 1px solid var(--rule);
}

.faq-item:last-child { border-bottom: 1px solid var(--rule); }

.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 0;
  width: 100%;
  background: none; border: none;
  font-family: var(--font);
  font-size: clamp(15px, 1.4vw, 18px);
  font-weight: 500;
  color: var(--fg);
  text-align: left;
  letter-spacing: -0.01em;
  gap: 24px;
  transition: color 0.2s;
}

.faq-q:hover { color: var(--primary); }

.faq-arrow {
  flex-shrink: 0;
  width: 16px; height: 16px;
  position: relative;
}

.faq-arrow::before {
  content: '';
  position: absolute; top: 50%; left: 0;
  width: 100%; height: 1.5px;
  background: var(--muted);
  transform: translateY(-50%);
}

.faq-arrow::after {
  content: '';
  position: absolute; top: 50%; left: 0;
  width: 100%; height: 1.5px;
  background: var(--muted);
  transform: translateY(-50%) rotate(90deg);
  transition: transform 0.35s var(--ease-out-expo);
}

.faq-item.open .faq-arrow::after {
  transform: translateY(-50%) rotate(0deg);
}

.faq-a {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.5s var(--ease-out-expo);
}

.faq-a-inner {
  padding: 0 0 28px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 540px;
}

.faq-item.open .faq-a { max-height: 400px; }

@media (max-width: 768px) {
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .faq-left h2 { position: static; }
}

/* ── CTA ────────────────────────────────────────────────────────────────── */

.cta-section {
  padding: clamp(100px, 16vh, 200px) 0 clamp(60px, 10vh, 120px);
  border-top: 1px solid var(--rule);
}

.cta-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(40px, 8vw, 120px);
  align-items: end;
}

.cta-heading {
  font-size: clamp(36px, 6vw, 80px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
}

.cta-right {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.cta-form {
  display: flex;
  gap: 0;
}

.cta-input {
  flex: 1;
  padding: 16px 20px;
  border: 1px solid var(--rule);
  border-right: none;
  background: var(--surface);
  font-family: var(--font);
  font-size: 15px;
  color: var(--fg);
  outline: none;
  transition: border-color 0.25s;
}

.cta-input:focus { border-color: var(--fg); }
.cta-input::placeholder { color: var(--subtle); }

.cta-btn {
  padding: 16px 32px;
  background: var(--fg);
  color: var(--bg);
  border: 1px solid var(--fg);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
  transition: background 0.25s, color 0.25s;
}

.cta-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
}

.cta-note {
  font-size: 12px;
  color: var(--subtle);
  line-height: 1.5;
}

.cta-success {
  display: none;
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
}

@media (max-width: 768px) {
  .cta-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cta-form { flex-direction: column; }
  .cta-input { border-right: 1px solid var(--rule); }
}

/* ── Footer ─────────────────────────────────────────────────────────────── */

.footer {
  padding: 32px 0;
  border-top: 1px solid var(--rule);
}

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

.footer-logo {
  height: clamp(45px, 5vw, 80px);
  width: auto;
  opacity: 0.5;
  transition: opacity 0.3s;
}

.footer-logo:hover { opacity: 1; }

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
  align-items: center;
}

.footer-links a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 12px;
  color: var(--muted);
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--fg); }

.footer-copy {
  font-size: 11px;
  color: var(--subtle);
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

/* ── Interactive Prototype ────────────────────────────────────────────── */

.prototype-section {
  padding: clamp(80px, 12vh, 160px) 0;
}

.prototype-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 100px);
  align-items: center;
}

.prototype-left {
  display: flex;
  flex-direction: column;
  gap: clamp(24px, 4vw, 48px);
}

.prototype-left h2 {
  font-size: clamp(28px, 4.5vw, 56px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.prototype-left p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 38ch;
}

.prototype-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  list-style: none;
}

.prototype-step-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.prototype-step-number {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--primary);
  border: 1px solid var(--rule);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.prototype-step-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
}

.prototype-step-desc {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
  line-height: 1.5;
}

.prototype-right {
  display: flex;
  justify-content: center;
  align-items: center;
}

.device-mockup {
  width: 100%;
  max-width: 410px;
  background: #000;
  border-radius: 48px;
  padding: 12px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.12),
              0 0 0 2px rgba(15, 23, 42, 0.05),
              inset 0 0 0 2px rgba(255, 255, 255, 0.1);
  position: relative;
}

.device-screen {
  width: 100%;
  aspect-ratio: 390 / 800;
  border-radius: 36px;
  overflow: hidden;
  background: #fff;
  position: relative;
}

.device-screen iframe {
  width: 100%;
  height: 100%;
  border: none;
}

@media (max-width: 768px) {
  .prototype-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .device-mockup {
    max-width: 360px;
  }
}

/* ── Reveal System ─────────────────────────────────────────────────────── */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.8s var(--ease-out-expo),
              transform 0.8s var(--ease-out-expo);
}

[data-reveal-delay="1"] { transition-delay: 0.1s !important; }
[data-reveal-delay="2"] { transition-delay: 0.2s !important; }
[data-reveal-delay="3"] { transition-delay: 0.3s !important; }
[data-reveal-delay="4"] { transition-delay: 0.4s !important; }