/* ========================================================================
   BTC International — Design System
   Corporate tech sobrio · navy + cyan · clean structured typography
   ======================================================================== */

:root {
  /* Brand */
  --btc-blue: #0080FF;
  --btc-blue-600: #0066D6;
  --btc-blue-700: #0052B0;
  --btc-cyan: #00D0FF;
  --btc-cyan-soft: #BEEFFF;

  /* Navy ramp */
  --navy-950: #03102B;
  --navy-900: #061A3F;
  --navy-800: #0B2455;
  --navy-700: #14366F;
  --navy-600: #1E4A95;

  /* Neutrals */
  --ink: #0E1729;
  --ink-2: #334155;
  --ink-3: #64748B;
  --ink-4: #94A3B8;
  --line: #E2E8F0;
  --line-2: #EEF2F7;
  --bg: #FFFFFF;
  --bg-soft: #F6F8FB;
  --bg-soft-2: #EEF3F9;

  /* Effects */
  --grad-brand: linear-gradient(135deg, #0080FF 0%, #00D0FF 100%);
  --grad-navy: linear-gradient(160deg, #061A3F 0%, #0B2455 50%, #14366F 100%);
  --grad-navy-2: linear-gradient(180deg, #03102B 0%, #061A3F 100%);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 1px 1px rgba(15, 23, 42, .03);
  --shadow-md: 0 8px 24px -8px rgba(15, 23, 42, .12), 0 2px 6px rgba(15, 23, 42, .04);
  --shadow-lg: 0 24px 60px -20px rgba(11, 36, 85, .25), 0 8px 20px -10px rgba(15, 23, 42, .08);
  --shadow-glow: 0 12px 40px -10px rgba(0, 128, 255, .35);

  /* Geometry */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 24px;
  --r-2xl: 32px;
  --maxw: 1280px;
  --gutter: clamp(20px, 4vw, 48px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Geist", ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-feature-settings: "ss01", "cv11";
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

/* ─── Typography ──────────────────────────────────────────────────────── */

.eyebrow {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--btc-blue);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--btc-blue);
  display: inline-block;
}
.eyebrow.on-dark { color: var(--btc-cyan); }
.eyebrow.on-dark::before { background: var(--btc-cyan); }

h1, h2, h3, h4 {
  font-family: "Geist", ui-sans-serif, system-ui, sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(40px, 4.6vw, 60px); line-height: 1.05; letter-spacing: -0.03em; font-weight: 600; }
h2 { font-size: clamp(30px, 3.6vw, 46px); line-height: 1.1; letter-spacing: -0.025em; }
h3 { font-size: clamp(20px, 1.8vw, 24px); line-height: 1.25; font-weight: 600; }
h4 { font-size: 16px; font-weight: 600; }

.lede {
  font-size: clamp(17px, 1.4vw, 19px);
  line-height: 1.55;
  color: var(--ink-2);
  text-wrap: pretty;
  max-width: 60ch;
}
.muted { color: var(--ink-3); }
.mono { font-family: "Geist Mono", ui-monospace, monospace; }

/* ─── Layout ──────────────────────────────────────────────────────────── */

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.section {
  padding: clamp(72px, 9vw, 128px) 0;
}
.section.tight { padding: clamp(56px, 7vw, 96px) 0; }
.section.dark {
  background: var(--grad-navy);
  color: rgba(255,255,255,.92);
}
.section.dark h1, .section.dark h2, .section.dark h3, .section.dark h4 { color: #fff; }
.section.dark .lede { color: rgba(255,255,255,.7); }
.section.soft { background: var(--bg-soft); }
.section.navy {
  background: var(--navy-950);
  color: rgba(255,255,255,.92);
}
.section.navy h1, .section.navy h2, .section.navy h3 { color: #fff; }
.section.navy .lede { color: rgba(255,255,255,.7); }

.section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: clamp(40px, 5vw, 64px);
  max-width: 760px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-self: center; }
.section-head.split {
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  max-width: none;
  align-items: end;
  gap: clamp(24px, 4vw, 64px);
}
@media (max-width: 800px) { .section-head.split { grid-template-columns: 1fr; align-items: start; } }

/* ─── Buttons ─────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .25s cubic-bezier(.2,.7,.2,1), box-shadow .25s, background .2s, color .2s, border-color .2s;
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; transition: transform .25s; }
.btn:hover svg { transform: translateX(3px); }

.btn-primary {
  background: var(--ink);
  color: #fff;
}
.btn-primary:hover {
  background: var(--btc-blue);
  box-shadow: var(--shadow-glow);
}
.btn-brand {
  background: var(--btc-blue);
  color: #fff;
}
.btn-brand:hover {
  background: var(--btc-blue-600);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--ink); background: var(--bg-soft); }
.btn-ghost.on-dark {
  border-color: rgba(255,255,255,.22);
  color: #fff;
}
.btn-ghost.on-dark:hover {
  border-color: var(--btc-cyan);
  background: rgba(0, 208, 255, .08);
  color: var(--btc-cyan);
}
.btn-link {
  padding: 0;
  background: transparent;
  color: var(--btc-blue);
  font-weight: 500;
  border: none;
  gap: 6px;
}
.btn-link:hover { color: var(--btc-blue-700); }
.btn-link.on-dark { color: var(--btc-cyan); }

/* ─── Cards & surfaces ────────────────────────────────────────────────── */

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(20px, 2.5vw, 28px);
  transition: transform .35s cubic-bezier(.2,.7,.2,1), box-shadow .35s, border-color .25s;
}
.card.hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.card.on-dark {
  background: rgba(255,255,255,.04);
  border-color: rgba(255,255,255,.08);
  backdrop-filter: blur(8px);
}
.card.on-dark:hover {
  background: rgba(255,255,255,.06);
  border-color: rgba(0, 208, 255, .35);
  box-shadow: 0 20px 60px -20px rgba(0, 208, 255, .25);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .01em;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--ink-2);
  border: 1px solid var(--line);
}
.tag.brand {
  background: rgba(0, 128, 255, .08);
  color: var(--btc-blue);
  border-color: rgba(0, 128, 255, .15);
}
.tag.on-dark {
  background: rgba(0, 208, 255, .1);
  color: var(--btc-cyan);
  border-color: rgba(0, 208, 255, .2);
}

/* ─── Grid helpers ────────────────────────────────────────────────────── */

.grid { display: grid; gap: clamp(16px, 2vw, 24px); }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid.cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
@media (max-width: 1000px) {
  .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid.cols-6 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .grid.cols-6 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ─── Navbar ──────────────────────────────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.88);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .25s, border-color .25s, box-shadow .25s;
}
.nav.scrolled {
  background: rgba(255,255,255,.96);
  border-bottom-color: var(--line);
}
.nav:has(.nav-mobile.open),
.nav.menu-open {
  background: #ffffff;
  border-bottom-color: var(--line);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}
.nav-logo img { height: 30px; width: auto; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  justify-content: center;
}
.nav-link, .nav-links > a {
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
  border-radius: 999px;
  transition: color .2s, background .2s;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}
.nav-link:hover, .nav-links > a:hover { color: var(--ink); background: var(--bg-soft); }
.nav-link.active, .nav-links > a.active { color: var(--btc-blue); }
.nav-link.active::after, .nav-links > a.active::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 2px;
  height: 2px;
  background: var(--grad-brand);
  border-radius: 2px;
}
.nav-caret { width: 10px; height: 10px; transition: transform .25s; opacity: .7; }
.nav-item-has-dd { position: relative; }
.nav-item-has-dd:hover .nav-caret,
.nav-item-has-dd.open .nav-caret { transform: rotate(180deg); }

/* Dropdown panel — solid background */
.nav-dd {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 380px;
  max-width: 440px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: 0 24px 60px -20px rgba(11, 36, 85, .25), 0 8px 20px -10px rgba(15, 23, 42, .08);
  padding: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
  z-index: 60;
}
.nav-dd::before {
  /* hover bridge so cursor can travel from trigger to panel */
  content: "";
  position: absolute;
  top: -10px; left: 0; right: 0; height: 10px;
}
.nav-item-has-dd:hover .nav-dd,
.nav-item-has-dd.open .nav-dd {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-dd-inner { display: grid; gap: 2px; }
.nav-dd-item {
  display: block;
  padding: 12px 14px;
  border-radius: var(--r-md);
  text-decoration: none;
  transition: background .2s;
}
.nav-dd-item:hover { background: var(--bg-soft); }
.nav-dd-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 2px;
}
.nav-dd-tag {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 9px;
  letter-spacing: .14em;
  background: rgba(0, 128, 255, .1);
  color: var(--btc-blue);
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
}
.nav-dd-desc {
  display: block;
  font-size: 12px;
  color: var(--ink-3);
  line-height: 1.4;
}

.nav-right { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px;
  font-size: 12px;
  font-weight: 500;
  background: #fff;
}
.lang-switch button {
  border: none; background: transparent; padding: 4px 10px; border-radius: 999px;
  color: var(--ink-3); cursor: pointer; font-family: inherit; font-weight: 500;
}
.lang-switch button.on { background: var(--ink); color: #fff; }

.nav-hamb {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
  cursor: pointer;
  align-items: center; justify-content: center;
  flex: 0 0 auto;
}
.nav-hamb span { display: block; width: 18px; height: 1.5px; background: var(--ink); position: relative; }
.nav-hamb span::before, .nav-hamb span::after {
  content: ""; position: absolute; left: 0; width: 18px; height: 1.5px; background: var(--ink);
}
.nav-hamb span::before { top: -5px; }
.nav-hamb span::after { top: 5px; }

/* Hide CTA earlier on small screens to free up room */
@media (max-width: 1240px) {
  .nav-link, .nav-links > a { padding: 8px 10px; font-size: 13.5px; }
}
@media (max-width: 1100px) {
  .nav-links { display: none; }
  .nav-hamb { display: inline-flex; }
  .nav-cta { display: none; }
}
@media (max-width: 480px) {
  .lang-switch { display: none; }
  .nav-inner { gap: 12px; padding: 12px var(--gutter); }
}

.nav-mobile {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: var(--nav-mobile-offset, 64px);
  left: 0;
  right: 0;
  bottom: 0;
  background: #ffffff;
  z-index: 60;
  border-top: 1px solid var(--line);
  box-shadow: 0 24px 60px -20px rgba(15, 23, 42, .15);
  overflow-x: hidden;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
}
.nav-mobile.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
.nav-mobile-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  padding: 20px var(--gutter) 40px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: #ffffff;
}
@media (min-width: 1101px) {
  .nav-mobile {
    display: none;
  }
}
.nav-mobile-main {
  display: block;
  padding: 16px 18px;
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  border-radius: var(--r-md);
  border: 1px solid transparent;
  transition: background .2s, border-color .2s, color .2s;
}
.nav-mobile-main:hover,
.nav-mobile-main:active { background: var(--bg-soft); }
.nav-mobile-main.active {
  color: var(--btc-blue);
  background: rgba(0, 128, 255, .06);
}
.nav-mobile-cta {
  margin-top: 20px;
  justify-content: center;
  font-size: 16px;
  padding: 16px 22px;
}
.nav-mobile-lang {
  display: inline-flex;
  align-self: center;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px;
  margin-top: 18px;
  background: #fff;
}
.nav-mobile-lang button {
  border: none; background: transparent; padding: 6px 14px; border-radius: 999px;
  color: var(--ink-3); cursor: pointer; font-family: inherit; font-weight: 500; font-size: 12px;
}
.nav-mobile-lang button.on { background: var(--ink); color: #fff; }

.language-suggest {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  width: min(calc(100% - 24px), 760px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid rgba(0, 128, 255, .16);
  border-radius: var(--r-lg);
  background: rgba(255,255,255,.96);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  box-shadow: 0 20px 50px -24px rgba(3, 16, 43, .35);
  z-index: 45;
}
.language-suggest-copy {
  min-width: 0;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.45;
}
.language-suggest-copy strong {
  display: block;
  font-weight: 600;
}
.language-suggest-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}
.language-suggest-actions .btn {
  padding: 10px 16px;
  font-size: 13px;
}
.language-suggest-close {
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink-3);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: color .2s, border-color .2s, background .2s;
}
.language-suggest-close:hover {
  color: var(--ink);
  border-color: var(--ink-3);
  background: var(--bg-soft);
}
@media (max-width: 720px) {
  .language-suggest {
    width: min(calc(100% - 20px), 520px);
    left: 10px;
    right: 10px;
    bottom: 12px;
    transform: none;
    align-items: stretch;
    flex-direction: column;
  }
  .language-suggest-actions {
    width: 100%;
    flex-wrap: wrap;
  }
  .language-suggest-actions .btn {
    flex: 1 1 180px;
    justify-content: center;
  }
  .language-suggest-close {
    flex: 0 0 34px;
    margin-left: auto;
  }
}

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

.footer {
  background: var(--navy-950);
  color: rgba(255,255,255,.7);
  padding: clamp(64px, 8vw, 96px) 0 32px;
}
.footer h4 { color: #fff; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; font-weight: 500; margin-bottom: 18px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1.3fr 1fr 1.8fr;
  gap: clamp(24px, 4vw, 56px);
  margin-bottom: 50px;
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer a {
  display: block;
  padding: 6px 0;
  color: rgba(255,255,255,.65);
  font-size: 14px;
  transition: color .2s;
}
.footer a:hover { color: var(--btc-cyan); }
.footer a.footer-contact-link {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  column-gap: 10px;
  align-items: start;
  white-space: normal;
}
.footer a.footer-contact-link svg {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  color: rgba(255,255,255,.72);
  transition: color .2s;
  align-self: start;
}
.footer a.footer-contact-link span {
  display: block;
  min-width: 0;
}
.footer a.footer-contact-link:hover svg {
  color: var(--btc-cyan);
}
.footer-brand img { height: 32px; width: auto; margin-bottom: 18px; filter: brightness(0) invert(1); }
.footer-brand p { font-size: 14px; max-width: 32ch; line-height: 1.5; margin: 0 0 20px; color: rgba(255,255,255,.6); }
.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,.5);
  gap: 16px;
  flex-wrap: wrap;
}
.footer-social { display: flex; gap: 8px; }
.footer-social a {
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 50%;
  display: inline-flex;
  align-items: center; justify-content: center;
  padding: 0;
  transition: border-color .2s, color .2s, background .2s;
}
.footer-social a:hover { border-color: var(--btc-cyan); color: var(--btc-cyan); background: rgba(0,208,255,.06); }
.footer-social svg { width: 16px; height: 16px; }

/* ─── Animations ──────────────────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1);
}
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }
.reveal[data-delay="4"] { transition-delay: .32s; }
.reveal[data-delay="5"] { transition-delay: .4s; }
.reveal[data-delay="6"] { transition-delay: .48s; }

@keyframes pulse-dot {
  0%, 100% { opacity: .35; transform: scale(.95); }
  50% { opacity: 1; transform: scale(1.05); }
}
@keyframes dash {
  to { stroke-dashoffset: -240; }
}
@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ─── Utility ─────────────────────────────────────────────────────────── */

.divider { height: 1px; background: var(--line); margin: 0; }
.divider.dark { background: rgba(255,255,255,.08); }
.kbd-list { display: flex; flex-wrap: wrap; gap: 8px; }
.bullet-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.bullet-list li {
  position: relative;
  padding-left: 22px;
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.55;
}
.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 12px; height: 2px;
  background: var(--btc-blue);
  border-radius: 2px;
}
.bullet-list.on-dark li { color: rgba(255,255,255,.75); }
.bullet-list.on-dark li::before { background: var(--btc-cyan); }

.feature-icon {
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, rgba(0,128,255,.08), rgba(0,208,255,.08));
  display: inline-flex;
  align-items: center; justify-content: center;
  color: var(--btc-blue);
  margin-bottom: 16px;
  border: 1px solid rgba(0,128,255,.1);
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-icon.on-dark {
  background: rgba(0,208,255,.08);
  border-color: rgba(0,208,255,.2);
  color: var(--btc-cyan);
}

/* ─── Image / asset placeholders ──────────────────────────────────────── */

.ph {
  position: relative;
  background: linear-gradient(135deg, var(--bg-soft) 0%, var(--bg-soft-2) 100%);
  border: 1px dashed rgba(15, 23, 42, .12);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-4);
  font-size: 12px;
  font-family: "Geist Mono", ui-monospace, monospace;
  letter-spacing: .04em;
}
.ph::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,128,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,128,255,.04) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.ph-label {
  position: relative;
  z-index: 1;
  background: #fff;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  text-transform: uppercase;
  font-size: 11px;
  color: var(--ink-3);
}
.ph.on-dark {
  background: linear-gradient(135deg, rgba(255,255,255,.03), rgba(0,208,255,.04));
  border-color: rgba(255,255,255,.1);
}
.ph.on-dark::before {
  background-image:
    linear-gradient(rgba(0,208,255,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,208,255,.08) 1px, transparent 1px);
}
.ph.on-dark .ph-label { background: rgba(255,255,255,.04); border-color: rgba(255,255,255,.1); color: rgba(255,255,255,.7); }

/* ─── Page hero shared ────────────────────────────────────────────────── */
.page-hero {
  background: var(--grad-navy-2);
  color: #fff;
  padding: clamp(120px, 12vw, 160px) 0 clamp(56px, 7vw, 96px);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  top: -40%; right: -10%;
  width: 720px; height: 720px;
  background: radial-gradient(circle, rgba(0,208,255,.18), transparent 60%);
  pointer-events: none;
}
.page-hero h1 { color: #fff; max-width: 18ch; }
.page-hero .lede { color: rgba(255,255,255,.72); max-width: 60ch; }
.crumb {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--btc-cyan);
  margin-bottom: 24px;
}
.crumb a { color: rgba(255,255,255,.6); }
.crumb a:hover { color: #fff; }