/* BIC demo page. Light and dark themes through CSS custom properties.
   The theme follows the system unless the visitor picks one (stored locally). */

:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-2: #f1f3f6;
  --text: #15181e;
  --muted: #5b6372;
  --line: #dde1e8;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --accent-soft: rgba(37, 99, 235, 0.09);
  --ok: #15803d;
  --ok-soft: rgba(21, 128, 61, 0.1);
  --bad: #b42318;
  --bad-soft: rgba(180, 35, 24, 0.09);
  --warn: #92400e;
  --warn-soft: rgba(217, 119, 6, 0.12);
  --code-bg: #0f1420;
  --code-text: #e6e9f0;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.08);
  color-scheme: light;
}

:root[data-theme='dark'] {
  --bg: #0b0e14;
  --surface: #131821;
  --surface-2: #1a2130;
  --text: #e7eaf0;
  --muted: #9aa3b2;
  --line: #262e3d;
  --accent: #6ea8ff;
  --accent-text: #0b0e14;
  --accent-soft: rgba(110, 168, 255, 0.14);
  --ok: #4ade80;
  --ok-soft: rgba(74, 222, 128, 0.12);
  --bad: #f87171;
  --bad-soft: rgba(248, 113, 113, 0.12);
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, 0.12);
  --code-bg: #070a10;
  --code-text: #dbe2f0;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0b0e14;
    --surface: #131821;
    --surface-2: #1a2130;
    --text: #e7eaf0;
    --muted: #9aa3b2;
    --line: #262e3d;
    --accent: #6ea8ff;
    --accent-text: #0b0e14;
    --accent-soft: rgba(110, 168, 255, 0.14);
    --ok: #4ade80;
    --ok-soft: rgba(74, 222, 128, 0.12);
    --bad: #f87171;
    --bad-soft: rgba(248, 113, 113, 0.12);
    --warn: #fbbf24;
    --warn-soft: rgba(251, 191, 36, 0.12);
    --code-bg: #070a10;
    --code-text: #dbe2f0;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

code,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
  font-size: 0.92em;
}

code {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.05em 0.35em;
}

.container {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

/* ---- Header ------------------------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  height: 60px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  display: inline-grid;
  place-items: center;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
}

.nav {
  display: flex;
  gap: 1rem;
  margin-left: auto;
  font-size: 0.95rem;
}

.nav a {
  color: var(--muted);
}

.nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-button,
.lang-switch {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 8px;
  height: 34px;
  min-width: 34px;
  padding: 0 0.6rem;
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-grid;
  place-items: center;
}

.icon-button:hover,
.lang-switch:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.theme-icon {
  width: 16px;
  height: 16px;
}

.theme-icon .sun {
  display: none;
}

:root[data-theme='dark'] .theme-icon .sun {
  display: inline;
}

:root[data-theme='dark'] .theme-icon .moon {
  display: none;
}

/* ---- Hero -------------------------------------------------------------- */

.hero {
  padding: 4.5rem 0 3rem;
  background:
    radial-gradient(60% 50% at 50% 0%, var(--accent-soft), transparent 70%),
    var(--bg);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  margin: 0 0 1.25rem;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
  font-weight: 800;
  max-width: 18ch;
}

.lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 62ch;
  margin: 0 0 2rem;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  height: 42px;
  padding: 0 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: var(--shadow);
  cursor: pointer;
  font-family: inherit;
}

.button:hover {
  text-decoration: none;
  border-color: var(--accent);
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.install {
  display: grid;
  gap: 0.5rem;
  max-width: 640px;
}

.install-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--line);
}

.install-row code {
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
  flex: 1;
  overflow-x: auto;
  white-space: nowrap;
}

.copy {
  appearance: none;
  border: 1px solid #334155;
  background: transparent;
  color: #cbd5e1;
  border-radius: 7px;
  font: inherit;
  font-size: 0.8rem;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
}

.copy:hover {
  border-color: #64748b;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1rem;
  margin-top: 2.5rem;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}

.stat strong {
  display: block;
  font-size: 1.6rem;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.stat span {
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---- Sections ---------------------------------------------------------- */

section {
  padding: 3.5rem 0;
  border-top: 1px solid var(--line);
}

section.alt {
  background: var(--surface-2);
}

h2 {
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  margin: 0 0 0.6rem;
  font-weight: 750;
}

h3 {
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
  font-weight: 700;
}

.section-lead {
  color: var(--muted);
  max-width: 70ch;
  margin: 0 0 2rem;
}

.grid {
  display: grid;
  gap: 1.25rem;
}

.grid.cols-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid.cols-3 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.card p {
  color: var(--muted);
  margin: 0;
}

/* ---- Live examples ----------------------------------------------------- */

.example {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.example-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.example-head small {
  color: var(--muted);
  white-space: nowrap;
}

.view {
  min-height: 180px;
  display: grid;
  place-items: center;
  background:
    repeating-conic-gradient(var(--surface-2) 0% 25%, var(--surface) 0% 50%) 0 0 / 16px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.75rem;
  overflow: hidden;
}

.view canvas,
.view img {
  max-width: 100%;
  max-height: 260px;
  height: auto;
  display: block;
  image-rendering: auto;
}

.status {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  display: flex;
  gap: 0.5rem;
  align-items: center;
  min-height: 1.5em;
}

.status[data-state='ok']::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
  flex: none;
}

.status[data-state='bad'] {
  color: var(--bad);
}

.status[data-state='bad']::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--bad);
  flex: none;
}

.example-links {
  font-size: 0.9rem;
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

/* ---- Drop zone --------------------------------------------------------- */

.drop {
  border: 2px dashed var(--line);
  border-radius: 16px;
  padding: 2.25rem 1.5rem;
  text-align: center;
  background: var(--surface);
  transition: border-color 0.15s, background 0.15s;
}

.drop.over {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.drop p {
  margin: 0 0 0.75rem;
  color: var(--muted);
}

.drop input[type='file'] {
  max-width: 100%;
  color: var(--muted);
}

[hidden] {
  display: none !important;
}

.drop-result {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.75rem;
  justify-items: center;
}

.drop-result .view {
  width: 100%;
}

.meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---- Tables and notes -------------------------------------------------- */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: right;
  vertical-align: top;
  white-space: nowrap;
}

th {
  font-weight: 650;
  color: var(--muted);
  background: var(--surface-2);
  font-size: 0.82rem;
  text-transform: none;
}

tbody tr:last-child td {
  border-bottom: 0;
}

td:first-child,
th:first-child,
td:last-child,
th:last-child {
  text-align: left;
}

td:last-child {
  white-space: normal;
  min-width: 240px;
}

.thumb {
  width: 64px;
  height: 40px;
  object-fit: contain;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  vertical-align: middle;
  margin-right: 0.5rem;
}

.pill {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 650;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  white-space: nowrap;
}

.pill.good {
  color: var(--ok);
  background: var(--ok-soft);
}

.pill.bad {
  color: var(--bad);
  background: var(--bad-soft);
}

.pill.neutral {
  color: var(--warn);
  background: var(--warn-soft);
}

.callout {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 10px;
  padding: 0.9rem 1.1rem;
  margin: 1.5rem 0;
}

.callout p {
  margin: 0;
}

.two-col-do {
  border-top: 4px solid var(--ok);
}

.two-col-dont {
  border-top: 4px solid var(--bad);
}

.two-col-do h3 {
  color: var(--ok);
}

.two-col-dont h3 {
  color: var(--bad);
}

ul.check,
ul.cross {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

ul.check li::marker {
  color: var(--ok);
}

ul.cross li::marker {
  color: var(--bad);
}

/* ---- Code -------------------------------------------------------------- */

.tabs {
  display: grid;
  gap: 1rem;
}

.code {
  position: relative;
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: 14px;
  border: 1px solid var(--line);
  overflow: hidden;
}

.code-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.9rem;
  border-bottom: 1px solid #1f2937;
  font-size: 0.82rem;
  color: #94a3b8;
}

.code pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  line-height: 1.55;
}

.code .copy {
  font-size: 0.78rem;
}

/* ---- Downloads and footer --------------------------------------------- */

.downloads {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}

.download {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.download span {
  color: var(--muted);
  font-size: 0.9rem;
}

.attribution {
  font-size: 0.9rem;
  color: var(--muted);
}

.attribution li {
  margin-bottom: 0.35rem;
}

footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}


/* ---- Documentation layout ---------------------------------------------- */

.docs {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 2.5rem;
  padding: 2.5rem 0 1rem;
  align-items: start;
}

.toc {
  position: sticky;
  top: 84px;
  padding: 1rem 1.1rem;
}

.toc ol {
  padding-left: 1.2rem;
  margin: 0.6rem 0 0;
}

.toc li {
  margin: 0.35rem 0;
  font-size: 0.93rem;
}

.toc a {
  color: var(--muted);
}

.toc a:hover {
  color: var(--text);
}

.docs-body section {
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
}

.docs-body section:first-child {
  border-top: 0;
  padding-top: 0;
}

.docs-body h2 {
  font-size: 1.45rem;
  margin-top: 0;
}

.docs-body h3 {
  margin-top: 1.5rem;
  font-size: 1.02rem;
}

.docs-body p,
.docs-body li {
  color: var(--text);
}

.docs-body ul {
  padding-left: 1.3rem;
  color: var(--text);
}

.docs-body > section > p + pre,
.docs-body .code,
.docs-body pre {
  margin: 0.9rem 0;
}

.docs-body pre {
  background: var(--code-bg);
  color: var(--code-text);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  line-height: 1.55;
}

.docs-body pre code {
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
}

.docs-body .table-wrap {
  margin: 0.9rem 0;
}

.docs-body td:last-child {
  white-space: normal;
  min-width: 0;
}

@media (max-width: 860px) {
  .docs {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }
}

/* ---- Small screens ----------------------------------------------------- */

@media (max-width: 760px) {
  .nav {
    display: none;
  }

  .hero {
    padding-top: 3rem;
  }

  .install-row {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}