/* ForensicVision project site
   Palette mirrors gui/theme.py so the site and the application agree. */

/* --------------------------------------------------------------- tokens */

:root {
  --bg-0: #101216;
  --bg-1: #161920;
  --bg-2: #1c2029;
  --bg-3: #232833;
  --line: #2c323d;
  --line-soft: #23272f;
  --fg-0: #d7dce4;
  --fg-1: #9aa3b2;
  --fg-2: #6c7382;
  --accent: #3d8bcd;
  --accent-bright: #59a4e2;
  --accent-dim: #23364a;
  --warn: #d99a2b;
  --error: #d0555a;
  --ok: #4c9e6b;
  --lock: #c8863c;

  /* Translucent tints, written out rather than derived with color-mix(),
     which fails silently on engines older than Chrome 111. */
  --header-bg: rgba(16, 18, 22, .88);
  --veil: rgba(16, 18, 22, .8);
  --accent-a08: rgba(61, 139, 205, .09);
  --accent-a12: rgba(61, 139, 205, .13);
  --accent-a20: rgba(61, 139, 205, .20);
  --ok-a20: rgba(76, 158, 107, .20);
  --warn-a20: rgba(217, 154, 43, .20);

  --shadow-1: 0 1px 2px rgba(0, 0, 0, .35);
  --shadow-2: 0 10px 30px rgba(0, 0, 0, .45);
  --shadow-3: 0 24px 70px rgba(0, 0, 0, .6);

  --radius: 10px;
  --radius-lg: 16px;
  --maxw: 1180px;
  --header-h: 60px;

  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "JetBrains Mono",
          Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
          "Helvetica Neue", Arial, sans-serif;
}

html[data-theme="light"] {
  --bg-0: #ffffff;
  --bg-1: #f6f7f9;
  --bg-2: #eef0f4;
  --bg-3: #e4e7ed;
  --line: #d3d8e0;
  --line-soft: #e4e7ed;
  --fg-0: #1a1d23;
  --fg-1: #4d5563;
  --fg-2: #79818f;
  --accent: #1f6fb2;
  --accent-bright: #1a5f9b;
  --accent-dim: #dbe9f6;
  --warn: #9a6a10;
  --error: #b3383d;
  --ok: #2f7a4d;
  --lock: #96601f;

  --header-bg: rgba(255, 255, 255, .9);
  --veil: rgba(255, 255, 255, .85);
  --accent-a08: rgba(31, 111, 178, .07);
  --accent-a12: rgba(31, 111, 178, .11);
  --accent-a20: rgba(31, 111, 178, .16);
  --ok-a20: rgba(47, 122, 77, .16);
  --warn-a20: rgba(154, 106, 16, .18);

  --shadow-1: 0 1px 2px rgba(16, 18, 22, .06);
  --shadow-2: 0 10px 30px rgba(16, 18, 22, .10);
  --shadow-3: 0 24px 70px rgba(16, 18, 22, .16);
}

/* ----------------------------------------------------------- foundation */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 20px);
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg-0);
  color: var(--fg-0);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

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

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5em; font-weight: 650; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -.015em; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1rem; }

code, kbd, pre { font-family: var(--mono); font-size: .875em; }

code:not(pre code) {
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  padding: .12em .38em;
  color: var(--fg-0);
  white-space: nowrap;
}

kbd {
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: .1em .45em;
  font-size: .8em;
  color: var(--fg-0);
  white-space: nowrap;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 860px; }

.section { padding: 84px 0; border-top: 1px solid var(--line-soft); }
.section:first-of-type { border-top: 0; }
.section--alt { background: var(--bg-1); }

.eyebrow {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: .9rem;
}

.lede { font-size: 1.08rem; color: var(--fg-1); max-width: 68ch; }
.muted { color: var(--fg-1); }
.small { font-size: .85rem; }
.center { text-align: center; }
.center .lede { margin-inline: auto; }

/* --------------------------------------------------------------- header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: saturate(150%) blur(10px);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--line-soft);
}

.site-header__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--fg-0);
  letter-spacing: -.01em;
  flex: 0 0 auto;
}
.brand:hover { text-decoration: none; }
.brand svg { width: 26px; height: 26px; flex: 0 0 auto; }
.brand span { font-size: 1.02rem; }
.brand em {
  font-style: normal;
  color: var(--fg-2);
  font-weight: 500;
  font-size: .74rem;
  padding-left: 6px;
}

.site-nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.site-nav a {
  color: var(--fg-1);
  font-size: .9rem;
  font-weight: 500;
  padding: 7px 11px;
  border-radius: 7px;
}
.site-nav a:hover { color: var(--fg-0); background: var(--bg-2); text-decoration: none; }
.site-nav a.is-active { color: var(--fg-0); background: var(--bg-2); }

.header-tools { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }

.icon-btn {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-1);
  color: var(--fg-1);
  cursor: pointer;
  padding: 0;
}
.icon-btn:hover { color: var(--fg-0); border-color: var(--accent); }
.icon-btn svg { width: 17px; height: 17px; }

html[data-theme="light"] .theme-toggle .moon { display: none; }
html:not([data-theme="light"]) .theme-toggle .sun { display: none; }

.nav-toggle { display: none; }

/* --------------------------------------------------------------- buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 9px;
  border: 1px solid transparent;
  font-size: .93rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform .12s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: none; }
.btn svg { width: 17px; height: 17px; }

.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-bright); }
html[data-theme="light"] .btn--primary:hover { background: var(--accent-bright); }

.btn--ghost {
  background: var(--bg-1);
  border-color: var(--line);
  color: var(--fg-0);
}
.btn--ghost:hover { border-color: var(--accent); }

.btn--sm { padding: 8px 14px; font-size: .85rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ------------------------------------------------------------------ hero */

.hero {
  position: relative;
  overflow: hidden;
  padding: 76px 0 0;
  background:
    radial-gradient(1100px 460px at 50% -140px,
      var(--accent-a20), transparent 70%),
    var(--bg-0);
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(760px 340px at 50% 0, #000, transparent 78%);
  -webkit-mask-image: radial-gradient(760px 340px at 50% 0, #000, transparent 78%);
  opacity: .5;
  pointer-events: none;
}

.hero__inner { position: relative; text-align: center; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--fg-1);
  border-radius: 999px;
  padding: 5px 14px 5px 6px;
  font-size: .8rem;
  margin-bottom: 22px;
}
.pill b {
  background: var(--accent-dim);
  color: var(--accent-bright);
  border-radius: 999px;
  padding: 2px 9px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .03em;
}

.hero h1 { margin-bottom: .35em; }
.hero h1 .grad {
  background: linear-gradient(96deg, var(--accent-bright), #7fc4a8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lede {
  font-size: 1.14rem;
  color: var(--fg-1);
  max-width: 62ch;
  margin: 0 auto 30px;
}

.hero .btn-row { justify-content: center; margin-bottom: 26px; }

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  justify-content: center;
  margin-bottom: 52px;
}
.badges img { height: 20px; }

.hero__shot {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  border-bottom: 0;
  overflow: hidden;
  box-shadow: var(--shadow-3);
  background: var(--bg-1);
}
.hero__shot::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 90px;
  background: linear-gradient(transparent, var(--bg-0));
  pointer-events: none;
}

.chrome {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--line);
}
.chrome i {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--line); display: block;
}
.chrome i:nth-child(1) { background: #d0555a; }
.chrome i:nth-child(2) { background: #d99a2b; }
.chrome i:nth-child(3) { background: #4c9e6b; }
.chrome span {
  margin-left: 8px;
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--fg-2);
}

/* --------------------------------------------------------------- callout */

.callout {
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: var(--bg-1);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 26px 0;
}
.callout > :last-child { margin-bottom: 0; }
.callout__title {
  font-weight: 700;
  font-size: .93rem;
  margin-bottom: .35rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.callout--warn { border-left-color: var(--warn); }
.callout--warn .callout__title { color: var(--warn); }
.callout--danger { border-left-color: var(--error); }
.callout--danger .callout__title { color: var(--error); }
.callout--ok { border-left-color: var(--ok); }
.callout--ok .callout__title { color: var(--ok); }

/* ----------------------------------------------------------------- cards */

.grid { display: grid; gap: 18px; }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h3 { margin-bottom: .4rem; font-size: 1.02rem; }
.card p { color: var(--fg-1); font-size: .92rem; margin: 0; }

.card__icon {
  width: 38px; height: 38px;
  border-radius: 9px;
  display: grid; place-items: center;
  background: var(--accent-dim);
  color: var(--accent-bright);
  margin-bottom: 14px;
}
.card__icon svg { width: 19px; height: 19px; }

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
  margin: 30px 0;
}
.split__col {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--bg-1);
}
.split__col h3 { display: flex; align-items: center; gap: 9px; }
.split__col ul { margin: 0; padding-left: 1.1rem; color: var(--fg-1); }
.split__col li { margin-bottom: .5rem; font-size: .93rem; }
.split__col--classical { border-top: 3px solid var(--ok); }
.split__col--neural { border-top: 3px solid var(--warn); }

.tag {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 5px;
}
.tag--classical { background: var(--ok-a20); color: var(--ok); }
.tag--neural { background: var(--warn-a20); color: var(--warn); }

/* ----------------------------------------------------------------- stats */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 36px 0 0;
}
.stat { background: var(--bg-1); padding: 22px 18px; text-align: center; }
.stat b {
  display: block;
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--fg-0);
  line-height: 1.1;
}
.stat span { font-size: .8rem; color: var(--fg-2); }

/* ----------------------------------------------------------------- table */

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-1);
  -webkit-overflow-scrolling: touch;
}

table { border-collapse: collapse; width: 100%; font-size: .88rem; }
th, td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line-soft); }
thead th {
  background: var(--bg-2);
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--fg-1);
  white-space: nowrap;
  position: sticky;
  top: 0;
}
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: var(--bg-2); }
td:first-child, th:first-child { min-width: 220px; }
.t-center, .t-center th, .t-center td { text-align: center; }
.t-center td:first-child, .t-center th:first-child { text-align: left; }

.own { background: var(--accent-a08) !important; }
.yes { color: var(--ok); font-weight: 700; }
.no  { color: var(--fg-2); }
.part { color: var(--warn); }
.loss { color: var(--error); font-weight: 700; }

.legend { font-size: .8rem; color: var(--fg-2); margin-top: 12px; }

/* ------------------------------------------------------------- gallery */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 24px;
}
.filter {
  background: var(--bg-1);
  border: 1px solid var(--line);
  color: var(--fg-1);
  border-radius: 999px;
  padding: 7px 15px;
  font-size: .84rem;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}
.filter:hover { color: var(--fg-0); border-color: var(--accent); }
.filter.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: 20px;
}

.shot {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-1);
  cursor: zoom-in;
  transition: border-color .15s ease, transform .15s ease;
  display: flex;
  flex-direction: column;
}
.shot:hover { border-color: var(--accent); transform: translateY(-2px); }
.shot[hidden] { display: none; }
.shot__img { position: relative; background: var(--bg-0); }
.shot__img img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: top center;
}
.shot__zoom {
  position: absolute;
  top: 10px; right: 10px;
  width: 30px; height: 30px;
  border-radius: 7px;
  display: grid; place-items: center;
  background: var(--veil);
  border: 1px solid var(--line);
  color: var(--fg-1);
  opacity: 0;
  transition: opacity .15s ease;
}
.shot:hover .shot__zoom { opacity: 1; }
.shot__zoom svg { width: 15px; height: 15px; }
.shot__body { padding: 16px 18px; border-top: 1px solid var(--line-soft); }
.shot__body h3 { font-size: .96rem; margin-bottom: .25rem; }
.shot__body p { font-size: .85rem; color: var(--fg-1); margin: 0; }

/* ------------------------------------------------------------- lightbox */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(6, 7, 10, .93);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 40px 20px 80px;
}
.lightbox.is-open { display: flex; }
.lightbox img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid var(--line);
}
.lightbox__cap {
  position: absolute;
  left: 0; right: 0; bottom: 22px;
  text-align: center;
  color: #d7dce4;
  font-size: .9rem;
  padding: 0 60px;
}
.lightbox__btn {
  position: absolute;
  background: rgba(28, 32, 41, .9);
  border: 1px solid #2c323d;
  color: #d7dce4;
  width: 42px; height: 42px;
  border-radius: 50%;
  display: grid; place-items: center;
  cursor: pointer;
}
.lightbox__btn:hover { border-color: #3d8bcd; }
.lightbox__btn svg { width: 18px; height: 18px; }
.lightbox__close { top: 20px; right: 20px; }
.lightbox__prev { left: 20px; top: 50%; transform: translateY(-50%); }
.lightbox__next { right: 20px; top: 50%; transform: translateY(-50%); }

/* ------------------------------------------------------------------ code */

.code {
  position: relative;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0 0 18px;
}
.code__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px 8px 14px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--fg-2);
  letter-spacing: .04em;
  text-transform: uppercase;
}
.code pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font-size: .84rem;
  line-height: 1.7;
  color: var(--fg-0);
}
.code pre .c { color: var(--fg-2); }
.code pre .p { color: var(--ok); }
.code pre .k { color: var(--accent-bright); }
.code pre .s { color: var(--warn); }

.copy {
  border: 1px solid var(--line);
  background: var(--bg-1);
  color: var(--fg-1);
  border-radius: 6px;
  font-size: .72rem;
  font-family: var(--sans);
  font-weight: 600;
  padding: 3px 10px;
  cursor: pointer;
  letter-spacing: 0;
  text-transform: none;
}
.copy:hover { color: var(--fg-0); border-color: var(--accent); }
.copy.is-done { color: var(--ok); border-color: var(--ok); }

/* ------------------------------------------------------------------ tabs */

.tabs { margin: 0 0 18px; }
.tabs__list {
  display: flex;
  gap: 3px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 16px;
}
.tabs__btn {
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--fg-1);
  font-family: inherit;
  font-size: .89rem;
  font-weight: 600;
  padding: 9px 14px;
  cursor: pointer;
  margin-bottom: -1px;
}
.tabs__btn:hover { color: var(--fg-0); }
.tabs__btn[aria-selected="true"] { color: var(--accent-bright); border-bottom-color: var(--accent); }
.tabs__panel[hidden] { display: none; }

/* ------------------------------------------------------------------ steps */

.steps { counter-reset: step; list-style: none; padding: 0; margin: 26px 0 0; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 26px 52px;
  border-left: 1px solid var(--line);
  margin-left: 15px;
}
.steps li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps li::before {
  content: counter(step);
  position: absolute;
  left: -15px; top: -2px;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--accent-bright);
  font-size: .82rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}
.steps h3 { font-size: 1rem; margin-bottom: .3rem; }
.steps p { color: var(--fg-1); font-size: .93rem; margin: 0; }

/* --------------------------------------------------------------- roadmap */

.roadmap { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.roadmap__col {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.roadmap__col h3 { font-size: .82rem; text-transform: uppercase; letter-spacing: .09em; color: var(--fg-2); }
.roadmap__col ul { list-style: none; padding: 0; margin: 14px 0 0; }
.roadmap__col li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 11px;
  font-size: .9rem;
  color: var(--fg-1);
}
.roadmap__col li::before {
  content: "";
  position: absolute;
  left: 0; top: 4px;
  width: 15px; height: 15px;
  border: 1px solid var(--fg-2);
  border-radius: 4px;
}
.roadmap__col li b { color: var(--fg-0); font-weight: 600; }
.roadmap__col--no li::before { border-color: var(--error); border-radius: 50%; }
.roadmap__col--no li::after {
  content: "";
  position: absolute;
  left: 4px; top: 10px;
  width: 7px; height: 1px;
  background: var(--error);
}

/* ---------------------------------------------------------------- author */

.author-card {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-1);
  padding: 30px;
}
.avatar {
  width: 76px; height: 76px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(140deg, var(--accent), #4c9e6b);
  color: #fff;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: .02em;
  flex: 0 0 auto;
}
.author-card__body { flex: 1 1 260px; }
.author-card h3 { margin-bottom: .15rem; font-size: 1.2rem; }

/* ---------------------------------------------------------------- footer */

.site-footer {
  border-top: 1px solid var(--line-soft);
  background: var(--bg-1);
  padding: 52px 0 30px;
  font-size: .9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 40px;
}
.footer-grid h4 {
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--fg-2);
  margin-bottom: .9rem;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: .5rem; }
.footer-grid a { color: var(--fg-1); }
.footer-grid a:hover { color: var(--fg-0); }
.footer-note {
  border-top: 1px solid var(--line-soft);
  padding-top: 22px;
  color: var(--fg-2);
  font-size: .82rem;
}
.footer-note p { margin-bottom: .6rem; }

.disclaimer {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 16px 20px;
  color: var(--fg-2);
  font-size: .82rem;
  line-height: 1.6;
  margin-bottom: 26px;
}

/* ------------------------------------------------------------- docs page */

.docs {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
  padding: 44px 0 90px;
}

.docs-nav {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  max-height: calc(100vh - var(--header-h) - 48px);
  overflow-y: auto;
  font-size: .89rem;
  padding-right: 8px;
}
.docs-nav h4 {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--fg-2);
  margin: 22px 0 .6rem;
}
.docs-nav h4:first-child { margin-top: 0; }
.docs-nav ul { list-style: none; padding: 0; margin: 0 0 4px; }
.docs-nav a {
  display: block;
  padding: 5px 12px;
  border-left: 2px solid var(--line-soft);
  color: var(--fg-1);
}
.docs-nav a:hover { color: var(--fg-0); border-left-color: var(--fg-2); text-decoration: none; }
.docs-nav a.is-active {
  color: var(--accent-bright);
  border-left-color: var(--accent);
  background: var(--accent-a08);
}

.docs-body { min-width: 0; }
.docs-body h2 {
  margin-top: 60px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}
.docs-body > h2:first-child, .docs-body > .doc-hero + h2 { margin-top: 0; border-top: 0; }
.docs-body h3 { margin-top: 34px; }
.docs-body ul, .docs-body ol { color: var(--fg-1); padding-left: 1.3rem; }
.docs-body li { margin-bottom: .45rem; }
.docs-body img { border: 1px solid var(--line); border-radius: var(--radius); margin: 20px 0; }
.docs-body table { margin: 18px 0; }

.doc-hero { margin-bottom: 46px; }
.doc-hero h1 { font-size: 2.3rem; }

.anchor {
  opacity: 0;
  margin-left: .4rem;
  font-weight: 400;
  color: var(--fg-2);
  font-size: .8em;
}
h2:hover .anchor, h3:hover .anchor { opacity: 1; }

.kbd-table td:first-child { min-width: 190px; white-space: nowrap; }

.to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease;
}
.to-top.is-visible { opacity: 1; pointer-events: auto; }

/* ----------------------------------------------------------- responsive */

@media (max-width: 960px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .docs { grid-template-columns: 1fr; gap: 0; }
  .docs-nav {
    position: static;
    max-height: none;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 34px;
    background: var(--bg-1);
  }
  .docs-nav ul { columns: 2; column-gap: 18px; }
}

@media (max-width: 780px) {
  .section { padding: 60px 0; }
  .hero { padding-top: 52px; }

  .nav-toggle { display: grid; }
  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: var(--bg-1);
    border-bottom: 1px solid var(--line);
    padding: 12px;
    box-shadow: var(--shadow-2);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 10px 12px; }

  .brand em { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .docs-nav ul { columns: 1; }
  .lightbox__prev { left: 8px; }
  .lightbox__next { right: 8px; }
  .lightbox__cap { padding: 0 20px; font-size: .8rem; }
}