/* ═══════════════════════════════════════════════════════════════
   SITE CHROME — nav, wordmark, buttons, chips, sections, footer.
   Loads after theme.css (tokens) on index.html only.
═══════════════════════════════════════════════════════════════ */

/* ── Lenis smooth-scroll host rules ── */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

body { background: var(--bg-base); }

/* ── Icon utility (Material Symbols Rounded sprite) ── */
.ic {
  width: 1em;
  height: 1em;
  fill: currentColor;
  display: inline-block;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════
   WORDMARK — the app's stacked lockup, exactly as shipped
   (assets/images/app_icon.png · coin_bridge_logo.dart):
   "coin" w600 tight-tracked · blue dot floating with a clear gap
   above the ı (0.19em) · rule wider than the wordmark (2.5em) ·
   "BRIDGE" 0.55em w300 letterspaced. All em-based — set font-size
   on .wm-stack and every size renders the same lockup.
═══════════════════════════════════════════════════════════════ */
.wm-stack {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  line-height: 1;
  user-select: none;
  font-size: 26px; /* default (footer); nav/preloader override */
}
.wm-coin {
  font-size: 1em;
  font-weight: 640;
  letter-spacing: -0.042em;
  color: var(--ink-900);
  line-height: 1;
}
.wm-i { position: relative; display: inline-block; }
/* Dot geometry measured against the ı's actual glyph ink (canvas
   TextMetrics): ink top = 0.348em from the box top → top = 0.348 − 0.04
   (the icon's gap) − 0.19 (dot). The box carries the trailing −0.042em
   tracking, so the stem's ink centre sits 0.021em right of box centre —
   hence the left calc. Change tracking or dot size → re-derive both. */
.wm-idot {
  position: absolute;
  top: calc(0.118em - 1px); /* −1px: user-tuned optical position */
  left: calc(50% + 0.021em);
  transform: translateX(-50%);
  width: 0.19em;
  height: 0.19em;
  border-radius: 50%;
  background: var(--cb-blue-600);
}
.wm-rule {
  width: 2.68em;
  height: max(2px, 0.042em);
  border-radius: 1px;
  background: var(--cb-blue-600);
  margin: 0.26em 0 0.34em;
}
.wm-bridge {
  font-size: 0.55em;
  font-weight: 300;
  letter-spacing: 0.135em;
  padding-left: 0.135em; /* optically recentre the tracked text */
  color: var(--ink-900);
  line-height: 1;
}

/* Context sizes */
#main-nav .wm-stack { font-size: 19px; }

/* ═══════════════════════════════════════════════════════════════
   NAVIGATION
═══════════════════════════════════════════════════════════════ */
#main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 clamp(16px, 3vw, 40px);
  z-index: var(--z-sticky);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition:
    transform var(--dur-sheet) var(--ease-cb),
    background var(--dur-standard) var(--ease-cb),
    border-color var(--dur-standard) var(--ease-cb),
    backdrop-filter var(--dur-standard) var(--ease-cb);
}
#main-nav.nav-scrolled {
  background: rgba(255, 255, 255, 0.78);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
}
#main-nav.nav-hidden { transform: translateY(-100%); }

.nav-logo { display: inline-flex; align-items: center; }

.nav-center {
  display: flex;
  align-items: center;
  gap: 4px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.nav-link {
  font-size: 14px;
  font-weight: 550;
  color: var(--ink-secondary);
  padding: 9px 14px;
  border-radius: var(--rad-lg);
  transition: color var(--dur-micro) var(--ease-cb), background var(--dur-micro) var(--ease-cb);
}
.nav-link:hover { color: var(--ink-primary); background: var(--bg-raised); }
.nav-link.active { color: var(--ink-primary); }

.nav-right { display: flex; align-items: center; gap: 10px; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 52px;
  padding: 0 26px;
  border-radius: var(--rad-btn);
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.01em;
  white-space: nowrap;
  transition:
    background var(--dur-micro) var(--ease-cb),
    color var(--dur-micro) var(--ease-cb),
    border-color var(--dur-micro) var(--ease-cb),
    box-shadow var(--dur-standard) var(--ease-cb),
    transform var(--dur-micro) var(--ease-cb);
}
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--cb-blue-600);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--cb-blue-700);
  box-shadow: var(--shadow-floating);
}

.btn-ghost {
  border: 1px solid var(--border2);
  color: var(--ink-primary);
  background: var(--bg-surface);
}
.btn-ghost:hover {
  border-color: var(--cb-blue-300);
  background: var(--cb-blue-50);
  color: var(--cb-blue-700);
}

.btn-sm { height: 40px; padding: 0 18px; font-size: 14px; border-radius: 10px; }

/* Store badges — two-line App Store / Google Play blocks */
.btn-store {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 22px 10px 18px;
  border-radius: var(--rad-btn);
  background: var(--ink-900);
  color: var(--white);
  border: 1px solid var(--ink-900);
  text-align: left;
  transition:
    background var(--dur-micro) var(--ease-cb),
    box-shadow var(--dur-standard) var(--ease-cb),
    transform var(--dur-micro) var(--ease-cb);
}
.btn-store:hover { background: var(--ink-800); box-shadow: var(--shadow-lg); }
.btn-store:active { transform: scale(0.98); }
.btn-store svg { width: 24px; height: 24px; }
.btn-store .st-lines { display: flex; flex-direction: column; gap: 1px; line-height: 1.15; }
.btn-store .st-small { font-size: 10px; font-weight: 500; opacity: 0.75; letter-spacing: 0.02em; }
.btn-store .st-big { font-size: 16px; font-weight: 650; letter-spacing: -0.01em; }

/* Light store badge (on dark CTA) */
.btn-store.on-dark {
  background: var(--white);
  color: var(--ink-900);
  border-color: var(--white);
}
.btn-store.on-dark:hover { background: var(--bg-raised); }

/* ── Chips (app CBStatusChip recipe: tint @10%, radius 8, 11px w700) ── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: var(--rad-chip);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.chip .ic { font-size: 13px; }
.chip-blue  { background: rgba(37, 99, 235, 0.10);  color: var(--cb-blue-700); }
.chip-green { background: rgba(16, 185, 129, 0.10); color: var(--trade-buy-ink); }
.chip-amber { background: rgba(245, 158, 11, 0.12); color: var(--sys-warn-ink); }
.chip-red   { background: rgba(239, 68, 68, 0.10);  color: var(--trade-sell-ink); }
.chip-slate { background: var(--ink-100);           color: var(--ink-600); }

.chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}
.chip-dot.pulse { animation: cbPulse 1.8s var(--ease-in-out) infinite; }
@keyframes cbPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ═══════════════════════════════════════════════════════════════
   MOBILE MENU
═══════════════════════════════════════════════════════════════ */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: var(--rad-lg);
}
.hamburger span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--ink-primary);
  transition: transform var(--dur-standard) var(--ease-cb), opacity var(--dur-micro);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mob-menu {
  position: fixed;
  inset: 72px 0 0 0;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  z-index: calc(var(--z-sticky) - 1);
  display: flex;
  flex-direction: column;
  padding: 24px clamp(16px, 5vw, 40px);
  gap: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition:
    opacity var(--dur-standard) var(--ease-cb),
    transform var(--dur-standard) var(--ease-cb),
    visibility 0s linear var(--dur-standard);
}
.mob-menu.open {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition:
    opacity var(--dur-standard) var(--ease-cb),
    transform var(--dur-standard) var(--ease-cb);
}
.mob-menu button,
.mob-menu a {
  text-align: left;
  font-size: 19px;
  font-weight: 650;
  color: var(--ink-primary);
  padding: 15px 12px;
  min-height: 44px;
  border-radius: var(--rad-btn);
  border-bottom: 1px solid var(--border);
}
.mob-menu button:active,
.mob-menu a:active { background: var(--bg-raised); }
.mob-menu .mm-link-blue { color: var(--cb-blue-600); border-bottom: none; }
.mob-menu .mm-link-muted {
  color: var(--ink-tertiary);
  font-size: 14px;
  font-weight: 550;
  border-bottom: none;
}

/* ═══════════════════════════════════════════════════════════════
   SECTION SCAFFOLDING
═══════════════════════════════════════════════════════════════ */
main { flex: 1; }
.page { display: none; }
.page.active { display: block; animation: pageIn var(--dur-sheet) var(--ease-cb); }
@keyframes pageIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

.section { padding: clamp(72px, 10vw, 128px) clamp(20px, 4vw, 40px); }
.section-inner { max-width: 1160px; margin: 0 auto; }
.section-tight { max-width: 780px; margin: 0 auto; }

.sec-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cb-blue-600);
  margin-bottom: 18px;
}
.sec-tag::before {
  content: '';
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--cb-blue-600);
}
.sec-h2 {
  font-size: clamp(2rem, 3.8vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.06;
  color: var(--ink-display);
  margin-bottom: 20px;
  text-wrap: balance;
}.sec-lead {
  font-size: clamp(1.0625rem, 1.5vw, 1.1875rem);
  line-height: 1.65;
  color: var(--ink-secondary);
  max-width: 620px;
}

/* Dark (navy) section base — the app's sanctioned dark accent surface */
.section-dark {
  background: var(--ink-900);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.section-dark .sec-h2 { color: var(--white); }
.section-dark .sec-lead { color: var(--ink-400); }

/* ═══════════════════════════════════════════════════════════════
   TICKER MARQUEE
═══════════════════════════════════════════════════════════════ */
.ticker-wrap {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  overflow: hidden;
  padding: 15px 0;
  position: relative;
}
.ticker-wrap::before,
.ticker-wrap::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 80px;
  z-index: 1;
  pointer-events: none;
}
.ticker-wrap::before { left: 0;  background: linear-gradient(90deg, var(--bg-surface), transparent); }
.ticker-wrap::after  { right: 0; background: linear-gradient(-90deg, var(--bg-surface), transparent); }

.ticker-track {
  display: flex;
  gap: 44px;
  width: max-content;
  animation: tickerSlide 34s linear infinite;
}
.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-tertiary);
  white-space: nowrap;
}
.ticker-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--cb-blue-400);
}
@keyframes tickerSlide {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ═══════════════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════════════ */
footer {
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
  padding: 56px clamp(20px, 4vw, 40px) 40px;
}
.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  text-align: center;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 8px;
}
.footer-links button,
.footer-links a {
  font-size: 14px;
  font-weight: 550;
  color: var(--ink-secondary);
  padding: 10px 12px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--rad-lg);
  transition: color var(--dur-micro) var(--ease-cb), background var(--dur-micro) var(--ease-cb);
}
.footer-links button:hover,
.footer-links a:hover { color: var(--ink-primary); background: var(--bg-raised); }
.footer-links .fl-mail { color: var(--cb-blue-600); font-weight: 650; }
.footer-copy { font-size: 13px; color: var(--ink-quaternary); }

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE CHROME
═══════════════════════════════════════════════════════════════ */
@media (max-width: 960px) {
  .nav-center { display: none; }
  .nav-right .btn-ghost { display: none; }
  .hamburger { display: flex; }
}
@media (max-width: 480px) {
  .nav-right .btn-sm.btn-primary { display: none; }
  .btn-store { width: 100%; justify-content: center; }
}

/* Hover-capable pointers only: magnetic buttons get a transform transition */
@media (hover: hover) and (pointer: fine) {
  .btn-magnetic { transition-property: background, color, border-color, box-shadow, transform; }
}