@font-face {
  font-family: SSequel;
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  src: url('/statisch/SSequel-Semi-subset.woff2') format('woff2'), url('/statisch/SSequel-Semi-subset.woff') format('woff');
}
@font-face {
  font-family: SSequel;
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('/statisch/SSequel-Book-subset.woff2') format('woff2'), url('/statisch/SSequel-Book-subset.woff') format('woff');
}
@font-face {
  font-family: SSequel;
  font-weight: 300;
  font-style: normal;
  font-display: swap;
  src: url('/statisch/SSequel-Light-subset.woff2') format('woff2'), url('/statisch/SSequel-Light-subset.woff') format('woff');
}

:root {
  color-scheme: light dark;
  --bti-navy: #002855;
  --bti-petrol: #007377;
  --bti-petrol-2: #009b9f;
  --bti-mint: #ccf4ea;
  --bti-cream: #f7f3e8;
  --bti-sand: #ebe3d1;
  --bti-ink: #0e2235;
  --bti-muted: #5e7184;
  --bti-bg: #f7f3e8;
  --bti-surface: rgba(255,255,255,.76);
  --bti-surface-strong: #fffdf8;
  --bti-border: rgba(0,40,85,.14);
  --bti-shadow: 0 24px 70px rgba(0, 40, 85, .14);
  --bti-radius: 28px;
  --rail-width: 285px;
  --bs-body-font-family: SSequel, Helvetica, Arial, system-ui, sans-serif;
  --bs-body-color: var(--bti-ink);
  --bs-body-bg: var(--bti-bg);
  --bs-primary: var(--bti-petrol);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bti-bg: #061721;
    --bti-surface: rgba(9, 35, 48, .76);
    --bti-surface-strong: #08202d;
    --bti-ink: #ecfbff;
    --bti-muted: #a2bac2;
    --bti-border: rgba(204,244,234,.18);
    --bti-shadow: 0 24px 80px rgba(0,0,0,.38);
    --bti-cream: #0d2a36;
    --bti-sand: #153945;
  }
}

:root[data-theme="light"] {
  color-scheme: light;
  --bti-bg: #f7f3e8;
  --bti-surface: rgba(255,255,255,.76);
  --bti-surface-strong: #fffdf8;
  --bti-ink: #0e2235;
  --bti-muted: #5e7184;
  --bti-border: rgba(0,40,85,.14);
  --bti-shadow: 0 24px 70px rgba(0, 40, 85, .14);
  --bti-cream: #f7f3e8;
  --bti-sand: #ebe3d1;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bti-bg: #061721;
  --bti-surface: rgba(9, 35, 48, .76);
  --bti-surface-strong: #08202d;
  --bti-ink: #ecfbff;
  --bti-muted: #a2bac2;
  --bti-border: rgba(204,244,234,.18);
  --bti-shadow: 0 24px 80px rgba(0,0,0,.38);
  --bti-cream: #0d2a36;
  --bti-sand: #153945;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 15% 10%, rgba(0,115,119,.20), transparent 30rem),
    radial-gradient(circle at 75% 5%, rgba(0,40,85,.15), transparent 35rem),
    linear-gradient(135deg, var(--bti-bg), color-mix(in srgb, var(--bti-bg), white 16%));
  color: var(--bti-ink);
  font-family: var(--bs-body-font-family);
  letter-spacing: -.01em;
}

@media (prefers-color-scheme: dark) {
  body {
    background:
      radial-gradient(circle at 18% 10%, rgba(0,155,159,.28), transparent 28rem),
      radial-gradient(circle at 76% 2%, rgba(0,40,85,.42), transparent 32rem),
      linear-gradient(135deg, #061721, #02090d 88%);
  }
}

:root[data-theme="light"] body {
  background:
    radial-gradient(circle at 15% 10%, rgba(0,115,119,.20), transparent 30rem),
    radial-gradient(circle at 75% 5%, rgba(0,40,85,.15), transparent 35rem),
    linear-gradient(135deg, var(--bti-bg), color-mix(in srgb, var(--bti-bg), white 16%));
}

:root[data-theme="dark"] body {
  background:
    radial-gradient(circle at 18% 10%, rgba(0,155,159,.28), transparent 28rem),
    radial-gradient(circle at 76% 2%, rgba(0,40,85,.42), transparent 32rem),
    linear-gradient(135deg, #061721, #02090d 88%);
}

a { color: var(--bti-petrol); text-decoration: none; }
a:hover { color: var(--bti-petrol-2); }
main :where(p, li) a:not(.btn) {
  color: color-mix(in srgb, var(--bti-petrol), var(--bti-ink) 12%);
  font-weight: 600;
  text-decoration-line: underline;
  text-decoration-thickness: .09em;
  text-underline-offset: .18em;
  text-decoration-color: color-mix(in srgb, currentColor, transparent 28%);
}
main :where(p, li) a:not(.btn):hover {
  color: var(--bti-petrol-2);
  text-decoration-color: currentColor;
}
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; }
pre {
  margin: 0;
  padding: 1.1rem;
  overflow-x: auto;
  white-space: pre;
  border-radius: 18px;
  border: 1px solid var(--bti-border);
  background: color-mix(in srgb, var(--bti-surface-strong), black 4%);
  color: var(--bti-ink);
  font-size: .9rem;
  line-height: 1.55;
}
.code-block {
  position: relative;
  display: flow-root;
}
.code-block pre {
  margin-bottom: 0;
}
.code-toolbar {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: flex-end;
  gap: .4rem;
  min-height: 2rem;
  margin: 0;
  padding-top: .75rem;
}
.code-tool {
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--bti-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--bti-surface-strong), transparent 4%);
  color: var(--bti-ink);
  font: inherit;
  font-size: .78rem;
  font-weight: 700;
  padding: .34rem .62rem;
  cursor: pointer;
  transition: border-color .18s ease, background .18s ease, box-shadow .18s ease;
}
.code-tool-icon {
  width: 2.15rem;
  min-width: 2.15rem;
  height: 2.15rem;
  padding: 0;
  font-size: 1rem;
  line-height: 1;
}
.code-tool-icon svg {
  width: 1.08rem;
  height: 1.08rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.code-tool:hover,
.code-tool[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--bti-petrol), transparent 42%);
  background: color-mix(in srgb, var(--bti-surface-strong), var(--bti-petrol) 5%);
  box-shadow: 0 10px 24px rgba(0,40,85,.09);
}
.code-tool:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--bti-petrol), white 30%);
  outline-offset: 3px;
}
pre.code-wrap {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -10rem;
  z-index: 10000;
  padding: .75rem 1rem;
  border-radius: 999px;
  background: var(--bti-ink);
  color: var(--bti-bg);
}
.skip-link:focus { top: 1rem; }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; scroll-behavior: auto !important; transition: none !important; } }

.rail {
  position: fixed;
  inset: 1.2rem auto 1.2rem 1.2rem;
  z-index: 20;
  width: var(--rail-width);
  display: flex;
  flex-direction: column;
  gap: .75rem;
  padding: 1.1rem;
  border: 1px solid var(--bti-border);
  border-radius: var(--bti-radius);
  background: color-mix(in srgb, var(--bti-surface), transparent 6%);
  backdrop-filter: blur(20px) saturate(130%);
  box-shadow: var(--bti-shadow);
}
.brand {
  display: flex;
  align-items: center;
  gap: .8rem;
  padding: .35rem .55rem .6rem;
  color: var(--bti-ink);
  border-bottom: 1px solid var(--bti-border);
}
.brand img { width: 116px; height: auto; object-fit: contain; }
.brand span { font-weight: 700; font-size: 1.28rem; }
.nav-list { display: grid; gap: .18rem; }
.nav-separator {
  width: 100%;
  height: 0;
  margin: .25rem 0 .15rem;
  border: 0;
  border-top: 1px solid var(--bti-border);
}
.nav-pill {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .32rem .72rem;
  border-radius: 999px;
  color: var(--bti-muted);
  font-weight: 500;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.nav-pill span { color: var(--bti-petrol); font-size: .65rem; }
.nav-pill:hover, .nav-pill.active {
  color: var(--bti-ink);
  background: color-mix(in srgb, var(--bti-petrol), transparent 86%);
  transform: translateX(2px);
}
.rail-note {
  margin: auto 0 0;
  text-align: center;
  color: var(--bti-muted);
  font-size: .78rem;
  line-height: 1.45;
  user-select: none;
  cursor: default;
}
.rail-note code { color: var(--bti-petrol); }
.rail-note[data-footer-terminal], .mobile-footer-note[data-footer-terminal] { cursor: pointer; }
.mini-terminal {
  width: 100%;
  height: calc(14.62rem + 1.5rem + 2px);
  max-height: none;
  padding: .75rem .8rem;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--bti-petrol), transparent 45%);
  border-radius: 10px;
  background: color-mix(in srgb, #02090d, var(--bti-petrol) 8%);
  color: #ccf4ea;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: .72rem;
  line-height: 1.45;
  letter-spacing: 0;
  text-align: left;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.035);
  user-select: text;
}
.mini-terminal .terminal-line {
  display: block;
  min-height: 1.45em;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.mini-terminal .terminal-blank { opacity: 0; }
.mini-terminal .terminal-muted { color: rgba(204,244,234,.72); }
.mini-terminal .terminal-error { color: #ffb4a8; }
.rail > .mini-terminal {
  position: absolute;
  z-index: 3;
  left: 1.1rem;
  right: 1.1rem;
  bottom: 1.1rem;
  width: auto;
  height: calc(14.62rem + 1.5rem + 2px);
  max-height: none;
  margin: 0;
}
.mobile-footer-note {
  display: none;
  margin: 0;
  color: var(--bti-muted);
  font-size: .72rem;
  line-height: 1.35;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .58rem;
  width: 100%;
  padding: .42rem .72rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--bti-muted);
  background: transparent;
  font: inherit;
  font-size: .86rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.theme-toggle:hover {
  color: var(--bti-ink);
  background: color-mix(in srgb, var(--bti-petrol), transparent 88%);
  transform: translateY(-1px);
}
.theme-toggle[aria-checked="true"] { color: var(--bti-ink); }
.theme-switch {
  position: relative;
  display: grid;
  flex: 0 0 auto;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  width: 3.75rem;
  height: 2rem;
  padding: 0 .25rem;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--bti-petrol), transparent 52%);
  border-radius: 999px;
  background: color-mix(in srgb, var(--bti-surface-strong), transparent 15%);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.06);
}
.theme-switch-icon {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  font-size: .82rem;
  line-height: 1;
  opacity: .48;
  filter: saturate(.9);
  transition: opacity .18s ease, filter .18s ease, transform .18s ease;
}
.theme-switch-knob {
  position: absolute;
  z-index: 1;
  top: .22rem;
  left: .23rem;
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--bti-surface), white 38%);
  box-shadow: 0 .18rem .5rem rgba(0,0,0,.22), inset 0 0 0 1px rgba(255,255,255,.42);
  transition: transform .2s ease, background .18s ease;
}
.theme-toggle[data-theme-state="light"] .theme-switch-icon-sun,
.theme-toggle[data-theme-state="dark"] .theme-switch-icon-moon {
  opacity: 1;
  filter: saturate(1.15);
  transform: scale(1.04);
}
.theme-toggle[data-theme-state="dark"] .theme-switch-knob { transform: translateX(1.74rem); }
.theme-toggle:hover .theme-switch { background: color-mix(in srgb, var(--bti-petrol), transparent 82%); }
.theme-toggle-label { white-space: nowrap; }
.theme-toggle-nav { justify-content: flex-start; }
.theme-toggle-mobile { display: none; }

.shell {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  margin-left: calc(var(--rail-width) + 2.4rem);
  padding: 1.2rem;
}
.view {
  position: relative;
  display: none;
  min-height: calc(100vh - 2.4rem);
  padding: clamp(1rem, 2vw, 2rem);
  overflow: hidden;
  border: 1px solid var(--bti-border);
  border-radius: calc(var(--bti-radius) + 8px);
  background: color-mix(in srgb, var(--bti-surface), transparent 2%);
  box-shadow: var(--bti-shadow);
  backdrop-filter: blur(18px) saturate(125%);
}
.view.active { display: block; animation: viewIn .28s ease-out; }
.view::before {
  content: "";
  position: absolute;
  inset: 9% 8% 7% 30%;
  z-index: 0;
  pointer-events: none;
  background: url('/statisch/BITel_S.png') center / contain no-repeat;
  opacity: .055;
  filter: blur(8px);
  transform: rotate(-8deg) scale(1.12);
}
.view > * {
  position: relative;
  z-index: 1;
}
:root[data-theme="dark"] .view::before {
  opacity: .075;
  filter: blur(9px);
}
@keyframes viewIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(330px, .75fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
  min-height: calc(100vh - 7rem);
}
.hero-copy { max-width: 760px; }
.eyebrow {
  margin: 0 0 .9rem;
  color: var(--bti-petrol);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .78rem;
  font-weight: 700;
}
h1, h2, h3 { color: var(--bti-ink); letter-spacing: -.045em; }
h1 {
  max-width: 12ch;
  font-size: clamp(2.85rem, 4.8vw, 4.65rem);
  line-height: 1;
  margin: 0 0 1.1rem;
}
.lead {
  max-width: 58ch;
  color: var(--bti-muted);
  font-size: clamp(1.08rem, 1.55vw, 1.32rem);
  line-height: 1.6;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin: 2rem 0 1rem; }
.btn-primary {
  --bs-btn-bg: var(--bti-petrol);
  --bs-btn-border-color: var(--bti-petrol);
  --bs-btn-hover-bg: var(--bti-navy);
  --bs-btn-hover-border-color: var(--bti-navy);
  border-radius: 999px;
  padding-inline: 1.35rem;
  box-shadow: 0 14px 28px rgba(0,115,119,.24);
}
.btn-ghost {
  border-radius: 999px;
  padding: .74rem 1.15rem;
  border: 1px solid var(--bti-border);
  color: var(--bti-ink);
  background: color-mix(in srgb, var(--bti-surface), white 12%);
  transition: border-color .18s ease, background .18s ease, box-shadow .18s ease;
}
.btn-ghost:hover,
.download-chips a:hover {
  border-color: color-mix(in srgb, var(--bti-petrol), transparent 42%);
  background: color-mix(in srgb, var(--bti-surface-strong), var(--bti-petrol) 5%);
  box-shadow: 0 14px 32px rgba(0,40,85,.1);
}
.btn-ghost:focus-visible,
.download-chips a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--bti-petrol), white 30%);
  outline-offset: 3px;
}
.trust-strip { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.2rem; }
.trust-strip span {
  padding: .42rem .68rem;
  border: 1px solid var(--bti-border);
  border-radius: 999px;
  color: var(--bti-muted);
  font-size: .82rem;
  background: color-mix(in srgb, var(--bti-surface), transparent 10%);
}

.speed-card {
  position: relative;
  overflow: hidden;
  padding: clamp(1rem, 2.2vw, 1.55rem);
  border: 1px solid var(--bti-border);
  border-radius: 34px;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--bti-surface-strong), white 5%), color-mix(in srgb, var(--bti-surface), var(--bti-petrol) 8%));
  box-shadow: 0 24px 70px rgba(0,40,85,.18);
}
.speed-card::before {
  content: "";
  position: absolute;
  inset: -30% -45% auto auto;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,155,159,.24), transparent 70%);
}
.speed-card-top {
  position: relative;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
  margin-bottom: 1rem;
}
.card-kicker { margin: 0 0 .15rem; color: var(--bti-muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; }
.speed-card h2 { margin: 0; font-size: clamp(1.5rem, 3vw, 2.15rem); }
.status-dot {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .35rem .6rem;
  border-radius: 999px;
  color: var(--bti-petrol);
  background: color-mix(in srgb, var(--bti-petrol), transparent 88%);
  font-size: .78rem;
  font-weight: 700;
}
.status-dot::before { content: ""; width: .55rem; height: .55rem; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 .24rem color-mix(in srgb, var(--bti-petrol), transparent 82%); }

#testWrapper { position: relative; text-align: center; }
#startStopBtn {
  display: inline-grid;
  place-items: center;
  min-width: min(100%, 15rem);
  min-height: 3.65rem;
  margin: .25rem auto 1rem;
  padding: .8rem 1.4rem;
  border: 0;
  border-radius: 999px;
  color: white;
  background: linear-gradient(135deg, var(--bti-petrol), var(--bti-navy));
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  box-shadow: 0 18px 34px rgba(0,115,119,.28);
  transition: transform .18s ease, filter .18s ease;
}
#startStopBtn:hover { transform: translateY(-2px); filter: brightness(1.04); }
#startStopBtn:focus-visible, .nav-pill:focus-visible, .bottom-nav a:focus-visible, .theme-toggle:focus-visible, a:focus-visible, button:focus-visible { outline: 3px solid color-mix(in srgb, var(--bti-petrol), white 30%); outline-offset: 3px; }
#startStopBtn::before { content: "Start"; }
#startStopBtn::after { content: "Speedtest"; margin-left: .35rem; opacity: .82; font-weight: 500; }
#startStopBtn.running { background: linear-gradient(135deg, #cf2e2e, #7c1220); }
#startStopBtn.running::before { content: "Abbrechen"; }
#startStopBtn.running::after { content: "Messung läuft"; }
#test { margin-top: .35rem; }
.compact-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  margin: .25rem 0 .65rem;
}
div.testArea2 {
  padding: .7rem .5rem;
  border: 1px solid var(--bti-border);
  border-radius: 18px;
  background: color-mix(in srgb, var(--bti-bg), transparent 24%);
}
div.testArea2 .testName, div.testArea .testName { color: var(--bti-muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; }
div.testArea2 .meterText { display: inline-block; min-width: 3ch; font-size: clamp(1.35rem, 4vw, 2rem); font-weight: 700; color: var(--bti-ink); }
div.meterText:empty::before { content: "—"; color: var(--bti-muted); }
div.testArea2 .unit { display: inline-block; color: var(--bti-muted); margin-left: .15rem; }
.gauge-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
div.testArea {
  position: relative;
  min-height: 13rem;
  padding: .8rem;
  border: 1px solid var(--bti-border);
  border-radius: 22px;
  background: color-mix(in srgb, var(--bti-bg), transparent 28%);
  overflow: hidden;
}
div.testArea canvas { position: absolute; inset: 1.55rem 0 .5rem; width: 100%; height: calc(100% - 2rem); transform: scale(.92); }
div.testArea .testName { position: relative; z-index: 2; }
div.testArea .meterText {
  position: absolute;
  z-index: 3;
  left: 0;
  right: 0;
  bottom: 2.55rem;
  font-size: clamp(1.65rem, 5vw, 2.5rem);
  font-weight: 700;
}
div.testArea .unit {
  position: absolute;
  z-index: 3;
  left: 0;
  right: 0;
  bottom: 1.65rem;
  color: var(--bti-muted);
}
#ipArea { min-height: 1.3rem; margin-top: .8rem; color: var(--bti-muted); font-size: .82rem; }
#ipArea span:not(:empty)::before { content: "Deine IP: "; }
#shareArea { margin: .8rem auto 0; color: var(--bti-muted); }
.fineprint { margin: 1rem 0 0; color: var(--bti-muted); font-size: .86rem; line-height: 1.5; }

.section-header { max-width: 860px; margin-bottom: 1.5rem; }
.section-header h2 { font-size: clamp(2.35rem, 5.5vw, 5rem); line-height: .95; margin-bottom: .85rem; }
.section-header p:not(.eyebrow) { color: var(--bti-muted); font-size: 1.08rem; line-height: 1.65; }
.card-grid { display: grid; gap: 1rem; }
.card-grid.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
#bitel .card-grid.two { grid-template-columns: 1fr; }
.info-card, .stat-card, .api-grid a {
  border: 1px solid var(--bti-border);
  border-radius: 24px;
  background: color-mix(in srgb, var(--bti-surface-strong), transparent 8%);
  box-shadow: 0 14px 35px rgba(0,40,85,.08);
}
.info-card { padding: 1.2rem; }
.info-card h3 { font-size: 1.25rem; margin-bottom: .55rem; }
.info-card p { margin: 0; color: var(--bti-muted); line-height: 1.6; }
.info-card ul { margin: 0; padding-left: 1.2rem; color: var(--bti-muted); line-height: 1.6; }
.info-card li + li { margin-top: .35em; }
.info-card.important p + p, .info-card.caution p + p { margin-top: .7em; }
.info-card.important { background: linear-gradient(135deg, color-mix(in srgb, var(--bti-petrol), transparent 84%), color-mix(in srgb, var(--bti-surface-strong), transparent 4%)); }
.info-card.caution { background: linear-gradient(135deg, color-mix(in srgb, #c9483d, transparent 84%), color-mix(in srgb, var(--bti-surface-strong), transparent 4%)); }
.bitel-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(12rem, 28%, 16rem);
  column-gap: clamp(1.25rem, 4vw, 2.25rem);
  min-height: 14.5rem;
  padding: 1.2rem;
  overflow: hidden;
  align-content: center;
  align-items: center;
}
.bitel-card-copy {
  grid-column: 1;
  display: grid;
  gap: .55rem;
  align-content: center;
}
.bitel-card-copy h3,
.bitel-card-copy p {
  margin: 0;
}
.info-card.bitel-card p + p {
  margin-top: 0;
}
.bitel-card .bitel-card-art {
  grid-column: 2;
  grid-row: 1;
  display: block;
  justify-self: end;
  align-self: center;
  width: 100%;
  max-height: 14.5rem;
  object-fit: contain;
  pointer-events: none;
}
.bitel-card-recommend {
  background: linear-gradient(135deg, color-mix(in srgb, var(--bti-petrol), transparent 82%), color-mix(in srgb, var(--bti-surface-strong), transparent 4%));
}
.bitel-card-availability {
  background: linear-gradient(135deg, color-mix(in srgb, var(--bti-navy), transparent 86%), color-mix(in srgb, var(--bti-surface-strong), var(--bti-petrol) 4%));
}
.bitel-card-support {
  background: linear-gradient(135deg, color-mix(in srgb, #c9483d, transparent 88%), color-mix(in srgb, var(--bti-surface-strong), var(--bti-petrol) 3%));
}
.bitel-card-support .bitel-card-art {
  opacity: .74;
}
.bitel-card-datacenter .bitel-card-art {
  opacity: .78;
}
.steps { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: .75rem; margin-top: 1rem; }
.step-card {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: .6rem;
  min-height: 13.5rem;
  padding: 1rem;
  border: 1px solid var(--bti-border);
  border-radius: 22px;
  background: color-mix(in srgb, var(--bti-surface), transparent 12%);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  box-shadow: 0 14px 35px rgba(0,40,85,.06);
  transition: transform .18s ease, border-color .18s ease, background .18s ease, box-shadow .18s ease;
}
.step-card-image {
  grid-template-rows: 4.9rem 1fr;
  overflow: hidden;
}
.step-card-image::after {
  content: "";
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 5rem;
  height: 4rem;
  border-radius: 6px;
  background-image: var(--step-card-icon);
  background-position: top right;
  background-repeat: no-repeat;
  background-size: var(--step-card-icon-size, 100% 100%);
  -webkit-mask-image:
    linear-gradient(to right, transparent 0, #000 5px, #000 calc(100% - 5px), transparent 100%),
    linear-gradient(to bottom, transparent 0, #000 5px, #000 calc(100% - 5px), transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image:
    linear-gradient(to right, transparent 0, #000 5px, #000 calc(100% - 5px), transparent 100%),
    linear-gradient(to bottom, transparent 0, #000 5px, #000 calc(100% - 5px), transparent 100%);
  mask-composite: intersect;
  z-index: 0;
  pointer-events: none;
}
.step-card-image:is([data-tip="vpnProxy"], [data-tip="repeat"])::after {
  width: 4.8rem;
  height: 4.8rem;
}
.step-card > * { position: relative; z-index: 1; }
.step-card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--bti-petrol), transparent 42%); background: color-mix(in srgb, var(--bti-surface-strong), var(--bti-petrol) 5%); box-shadow: 0 18px 42px rgba(0,40,85,.11); }
.step-card:focus-visible { outline: 3px solid color-mix(in srgb, var(--bti-petrol), white 30%); outline-offset: 3px; }
.step-head { display: flex; align-items: flex-start; justify-content: space-between; gap: .75rem; }
.step-number { display: block; color: var(--bti-petrol); font-size: 2rem; font-weight: 700; line-height: 1; }
.step-icon {
  display: grid;
  place-items: center;
  width: 3.3rem;
  height: 3.3rem;
  border-radius: 16px;
  background: color-mix(in srgb, var(--bti-surface-strong), transparent 2%);
}
.step-icon svg { width: 2.25rem; height: 2.25rem; }
.step-icon img { display: block; width: 2.15rem; height: 2.15rem; object-fit: cover; border-radius: 12px; }
.step-icon-image { overflow: hidden; }
.step-icon path { fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.step-card span:last-child { display: block; color: var(--bti-muted); line-height: 1.45; }
body.modal-open { overflow: hidden; }
.tip-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  background: color-mix(in srgb, var(--bti-petrol) 24%, rgba(247, 253, 250, .27));
  backdrop-filter: blur(9px);
}
.tip-overlay[hidden] { display: none; }
.tip-dialog {
  position: relative;
  width: min(42rem, 100%);
  max-height: min(82vh, 42rem);
  overflow: auto;
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid color-mix(in srgb, var(--bti-petrol), transparent 54%);
  border-radius: 30px;
  background:
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--bti-petrol), transparent 78%), transparent 14rem),
    linear-gradient(145deg, color-mix(in srgb, var(--bti-surface-strong), white 3%), color-mix(in srgb, var(--bti-surface), var(--bti-petrol) 5%));
  box-shadow: 0 30px 90px rgba(0,0,0,.38);
}
.tip-dialog h3 { margin: 0 2.5rem .8rem 0; font-size: clamp(1.55rem, 4vw, 2.25rem); }
.tip-dialog-copy { color: var(--bti-muted); line-height: 1.65; }
.tip-dialog-figure {
  margin: .2rem 0 1.15rem;
  padding: .75rem;
  border: 1px solid var(--bti-border);
  border-radius: 22px;
  background: color-mix(in srgb, var(--bti-surface-strong), transparent 4%);
}
.tip-dialog-figure img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 11rem;
  margin-inline: auto;
  object-fit: contain;
  border-radius: 16px;
  -webkit-mask-image:
    linear-gradient(to right, transparent 0, #000 7px, #000 calc(100% - 7px), transparent 100%),
    linear-gradient(to bottom, transparent 0, #000 7px, #000 calc(100% - 7px), transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image:
    linear-gradient(to right, transparent 0, #000 7px, #000 calc(100% - 7px), transparent 100%),
    linear-gradient(to bottom, transparent 0, #000 7px, #000 calc(100% - 7px), transparent 100%);
  mask-composite: intersect;
}
.tip-dialog-copy p { margin: 0 0 .9rem; }
.tip-dialog-copy p:last-child { margin-bottom: 0; }
.tip-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  border: 1px solid var(--bti-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--bti-surface-strong), transparent 5%);
  color: var(--bti-ink);
  font: inherit;
  font-size: 1.45rem;
  line-height: 1;
  cursor: pointer;
}
.tip-close:hover { background: color-mix(in srgb, var(--bti-petrol), transparent 84%); }
.download-chips { display: flex; flex-wrap: wrap; gap: .65rem; margin-bottom: 1.3rem; }
.download-chips a {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  min-height: 2.65rem;
  padding: .54rem .88rem .54rem .68rem;
  border-radius: 999px;
  border: 1px solid var(--bti-border);
  color: var(--bti-ink);
  background: color-mix(in srgb, var(--bti-surface-strong), transparent 4%);
  font-weight: 700;
  line-height: 1;
  transition: border-color .18s ease, background .18s ease, box-shadow .18s ease;
}
.download-chip-icon {
  display: inline-grid;
  place-items: center;
  width: 1.65rem;
  height: 1.65rem;
  flex: 0 0 auto;
  font-size: 1.28rem;
  line-height: 1;
}
.code-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1rem; }
.code-grid h3 { font-size: 1.05rem; margin: 0 0 .55rem; }
#iperf3 .info-card.important + .code-grid { margin-top: 1rem; }
.method-card p + p { margin-top: .7em; }
.method-card pre { margin: .85rem 0 0; }
.method-card pre + p { margin-top: 1.25rem; }
.method-card .code-caption {
  margin-top: 1rem;
  color: var(--bti-ink);
  font-size: 1rem;
  font-style: normal;
}
.method-card .code-caption + pre { margin-top: .35rem; }
.method-intro {
  max-width: 66ch;
  margin: -.25rem 0 1rem;
  color: var(--bti-muted);
  line-height: 1.6;
}
.stats-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  justify-items: start;
  gap: 1.15rem;
}
.stat-card {
  display: block;
  width: max-content;
  max-width: 100%;
  margin: 0;
  padding: .85rem;
}
.stat-card a { display: block; max-width: 100%; }
.stat-card img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  background: transparent;
}
.stat-card figcaption {
  margin: 0 0 .55rem;
  color: var(--bti-ink);
  font-size: .95rem;
  font-weight: 700;
}
.stat-record-title {
  margin: .15rem 0 -.35rem;
  color: var(--bti-muted);
  font-size: 1.08rem;
  line-height: 1.65;
  font-weight: 400;
}
.api-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: .85rem; }
.api-grid a { display: grid; gap: .5rem; padding: 1rem; color: var(--bti-ink); }
.api-grid code { color: var(--bti-petrol); font-weight: 700; }
.api-grid span { color: var(--bti-muted); }
.nerd-note { margin-top: 1rem; }

.bottom-nav-wrap {
  position: fixed;
  z-index: 40;
  left: 50%;
  bottom: .85rem;
  display: none;
  width: min(94vw, 43rem);
  transform: translateX(-50%);
  pointer-events: none;
}
.bottom-nav {
  position: relative;
  z-index: 1;
  display: flex;
  gap: .18rem;
  width: 100%;
  padding: .35rem;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
  border: 1px solid var(--bti-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--bti-surface), transparent 18%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  backdrop-filter: blur(20px) saturate(150%);
  box-shadow: 0 18px 55px rgba(0,0,0,.22);
  pointer-events: auto;
}
.bottom-nav::-webkit-scrollbar { display: none; }
.bottom-nav a,
.bottom-nav .theme-toggle-mobile {
  flex: 0 0 auto;
  min-width: 4.15rem;
  padding: .7rem .45rem;
  scroll-snap-align: center;
  border: 0;
  border-radius: 999px;
  color: var(--bti-muted);
  background: transparent;
  text-align: center;
  font: inherit;
  font-size: .78rem;
  font-weight: 700;
  line-height: 1.2;
}
.bottom-nav a.active { color: var(--bti-ink); background: color-mix(in srgb, var(--bti-petrol), transparent 84%); }
.bottom-nav .theme-toggle-mobile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  min-width: 4.65rem;
  padding: .38rem .45rem;
  box-shadow: none;
  gap: 0;
}
.bottom-nav .theme-toggle-label { display: none; }
.bottom-nav .theme-switch {
  width: 3.65rem;
  height: 1.92rem;
}
.bottom-nav .theme-switch-knob {
  width: 1.48rem;
  height: 1.48rem;
}
.bottom-nav .theme-toggle[data-theme-state="dark"] .theme-switch-knob { transform: translateX(1.71rem); }
.bottom-nav-cue {
  position: absolute;
  top: 50%;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2.55rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--bti-surface-strong), transparent 8%);
  color: var(--bti-petrol);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1;
  opacity: 0;
  transform: translateY(-50%) scale(.94);
  transition: opacity .18s ease, transform .18s ease;
  box-shadow: 0 10px 26px rgba(0,0,0,.16);
  pointer-events: none;
}
.bottom-nav-cue-left { left: .18rem; }
.bottom-nav-cue-right { right: .18rem; }
.bottom-nav-wrap.can-scroll-left .bottom-nav-cue-left,
.bottom-nav-wrap.can-scroll-right .bottom-nav-cue-right {
  opacity: .96;
  transform: translateY(-50%) scale(1);
}

@media (max-width: 1120px) {
  .rail { display: none; }
  .shell { margin-left: 0; padding: .75rem .75rem 6.8rem; }
  .bottom-nav-wrap { display: block; }
  .mobile-footer-note {
    position: fixed;
    z-index: 41;
    left: .9rem;
    right: auto;
    bottom: 4.18rem;
    display: block;
    width: max-content;
    max-width: calc(100vw - 1.8rem);
    padding: .38rem .7rem;
    overflow: hidden;
    border: 1px solid var(--bti-border);
    border-radius: 999px;
    background: color-mix(in srgb, var(--bti-surface), transparent 24%);
    -webkit-backdrop-filter: blur(14px) saturate(145%);
    backdrop-filter: blur(14px) saturate(145%);
    box-shadow: 0 10px 30px rgba(0,0,0,.12);
    text-overflow: ellipsis;
    white-space: nowrap;
    pointer-events: auto;
  }
  .mobile-footer-note.mini-terminal {
    left: .75rem;
    right: .75rem;
    width: auto;
    bottom: 4.05rem;
    max-width: none;
    height: calc(14.62rem + 1.5rem + 2px);
    max-height: none;
    padding: .75rem .8rem;
    border: 1px solid color-mix(in srgb, var(--bti-petrol), transparent 45%);
    border-radius: 12px;
    background: color-mix(in srgb, #02090d, var(--bti-petrol) 8%);
    color: #ccf4ea;
    line-height: 1.45;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    text-overflow: clip;
    box-shadow: 0 18px 55px rgba(0,0,0,.30), inset 0 0 0 1px rgba(255,255,255,.035);
  }
  .view { min-height: calc(100vh - 1.5rem); }
}
@media (max-width: 900px) {
  .hero-grid, .card-grid.two, .code-grid, .stats-grid, .api-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-grid { min-height: auto; align-items: start; }
  .hero-grid > *,
  .hero-copy,
  .speed-card {
    min-width: 0;
    width: 100%;
    max-width: 100%;
  }
  .hero-copy :where(h1, .lead, .eyebrow) {
    max-width: 100%;
  }
  h1 { max-width: 10ch; }
  .steps { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 560px) {
  .view { padding: 1rem; border-radius: 26px; }
  .view::before { inset: 12% -18% 12% 4%; opacity: .045; }
  .bitel-card {
    display: block;
    min-height: 0;
    padding: 1.1rem;
  }
  .bitel-card .bitel-card-art {
    float: right;
    width: 72px;
    height: 72px;
    max-height: none;
    margin: .1rem 0 .55rem .85rem;
    object-fit: contain;
  }
  .bitel-card::after {
    content: "";
    display: block;
    clear: both;
  }
  .bitel-card-support .bitel-card-art,
  .bitel-card-datacenter .bitel-card-art {
    opacity: .74;
  }
  h1 { font-size: clamp(2.75rem, 13vw, 3.7rem); overflow-wrap: normal; }
  .lead { font-size: 1rem; }
  .speed-card { border-radius: 26px; padding: .9rem; }
  .gauge-grid, .compact-metrics, .steps { grid-template-columns: 1fr; }
  div.testArea { min-height: 11.5rem; }
  .hero-actions .btn { width: 100%; }
  .bottom-nav-wrap { width: calc(100vw - 1rem); bottom: .5rem; }
  .bottom-nav a,
  .bottom-nav .theme-toggle-mobile { font-size: .72rem; }
  .mobile-footer-note { left: .5rem; right: auto; bottom: 4rem; max-width: calc(100vw - 1rem); }
  .mobile-footer-note.mini-terminal { left: .5rem; right: .5rem; bottom: 3.95rem; }
}