/*
 * SPDX-FileCopyrightText: 2026 Alphin Tom
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Tokens follow docs/design/DESIGN_SYSTEM.md (version 1.2). Colours are role
 * names with a light and a dark value; nothing below sets a raw hex.
 */

@font-face {
  font-family: "IBM Plex Sans";
  src: url("fonts/IBMPlexSans-Variable.woff2") format("woff2");
  font-weight: 100 700;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/IBMPlexMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --canvas: #F6F6F3;
  --surface: #FFFFFF;
  --sunken: #EFEFEB;
  --hover: #EBEAE5;
  --pressed: #E2E1DA;
  --border: #DDDCD5;
  --border-strong: #C3C2BA;
  --text: #17191C;
  --text-muted: #50555B;
  --text-subtle: #62676D;
  --accent: #1E6B50;
  --accent-hover: #185A43;
  --accent-pressed: #134734;
  --accent-soft: #E3EFE9;
  --on-accent: #FFFFFF;

  --radius-control: 4px;
  --radius-card: 6px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --sans: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", Consolas, ui-monospace, monospace;

  color-scheme: light dark;
}

/* Dark: the system's choice unless Light is picked, or Dark when picked. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --canvas: #111315;
    --surface: #181B1E;
    --sunken: #0C0E10;
    --hover: #22262A;
    --pressed: #2A2F34;
    --border: #2A2E33;
    --border-strong: #3B4046;
    --text: #EAECEE;
    --text-muted: #A6ACB2;
    --text-subtle: #8E949B;
    --accent: #6CCBA3;
    --accent-hover: #84D8B4;
    --accent-pressed: #5AB892;
    --accent-soft: #183129;
    --on-accent: #0B1F17;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --canvas: #111315;
  --surface: #181B1E;
  --sunken: #0C0E10;
  --hover: #22262A;
  --pressed: #2A2F34;
  --border: #2A2E33;
  --border-strong: #3B4046;
  --text: #EAECEE;
  --text-muted: #A6ACB2;
  --text-subtle: #8E949B;
  --accent: #6CCBA3;
  --accent-hover: #84D8B4;
  --accent-pressed: #5AB892;
  --accent-soft: #183129;
  --on-accent: #0B1F17;
  color-scheme: dark;
}

:root[data-theme="light"] { color-scheme: light; }

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

html { scroll-behavior: auto; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent-soft); color: var(--text); }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-hover); }

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

code, pre { font-family: var(--mono); font-size: 0.875em; }

code {
  background: var(--sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius-control);
  padding: 1px 5px;
}

pre {
  background: var(--sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--space-3) var(--space-4);
  overflow-x: auto;
  line-height: 1.45;
}

pre code { background: none; border: 0; padding: 0; font-size: inherit; }

h1, h2, h3 { margin: 0; font-weight: 600; }

h1 { font-size: clamp(30px, 5vw, 44px); line-height: 1.15; letter-spacing: -0.01em; }
h2 { font-size: 22px; line-height: 1.25; margin-bottom: var(--space-3); }
h3 { font-size: 16px; line-height: 1.35; margin-bottom: var(--space-2); }

p { margin: 0 0 var(--space-3); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 var(--space-4); }

@media (min-width: 720px) {
  .wrap { padding: 0 var(--space-6); }
}

.skip {
  position: absolute;
  left: var(--space-4);
  top: -48px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  padding: var(--space-2) var(--space-3);
  z-index: 10;
}
.skip:focus { top: var(--space-2); }

/* Top bar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 52px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}
.brand:hover { color: var(--text); }
.brand img { display: block; border-radius: var(--radius-control); }

nav { display: flex; gap: var(--space-1); flex-wrap: wrap; margin-left: auto; }

nav a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--radius-control);
}
nav a:hover { background: var(--hover); color: var(--text); }

@media (max-width: 520px) {
  nav a.wide { display: none; }
}

/* Theme switch: a segmented control */

.theme {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-control);
  overflow: hidden;
}
.theme[hidden] { display: none; }

.theme button {
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 0;
  padding: 4px 10px;
  cursor: pointer;
  transition: background-color 80ms linear;
}
.theme button + button { border-left: 1px solid var(--border-strong); }
.theme button:hover { background: var(--hover); color: var(--text); }
.theme button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.theme button:focus-visible { outline-offset: -2px; border-radius: 0; }

/* Hero */

.hero { padding: var(--space-7) 0 var(--space-6); }

.hero-inner { max-width: 820px; margin-left: auto; margin-right: auto; text-align: center; }

.overline {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.lede {
  font-size: 18px;
  color: var(--text-muted);
  margin: var(--space-4) auto var(--space-5);
  max-width: 680px;
}

.actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.meta { font-size: 14px; color: var(--text-subtle); margin-top: var(--space-3); }

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 18px;
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 80ms linear, border-color 80ms linear;
}

.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hover); color: var(--on-accent); }
.btn-primary:active { background: var(--accent-pressed); }

.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--hover); color: var(--text); }
.btn-secondary:active { background: var(--pressed); }

/* Screenshots */

.shot { margin: 0; }

.shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--surface);
}

.shot-hero { margin-top: var(--space-7); }

/* Hero video player: the video, with a control bar drawn over its lower edge */

.player {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: #F6F6F3; /* the video's own paper colour, in both themes */
}

.player-video { display: block; width: 100%; height: 100%; object-fit: contain; background: #F6F6F3; }
.player.is-enhanced .player-video { cursor: pointer; }
.player-video::cue { font-family: var(--sans); font-size: 0.95em; background: rgba(23, 25, 28, 0.86); color: #FFFFFF; }

.player-bar {
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  opacity: 0;
  transition: opacity 160ms ease;
}
.player-bar[hidden] { display: none; }
.player:hover .player-bar,
.player:focus-within .player-bar,
.player.is-paused .player-bar { opacity: 1; }
@media (hover: none) { .player-bar { opacity: 1; } }

.pbtn {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid #C3C2BA;
  border-radius: var(--radius-control);
  background: #FFFFFF;
  color: #17191C;
  cursor: pointer;
  font: 600 13px/1 var(--sans);
  letter-spacing: 0.5px;
  transition: background-color 120ms ease, border-color 120ms ease;
}
.pbtn:hover { background: #EBEAE5; }
.pbtn:active { background: #E2E1DA; }
.pbtn[aria-pressed="true"] { background: #E3EFE9; border-color: #1E6B50; color: #1E6B50; }
.pbtn:focus-visible { outline: 2px solid #1E6B50; outline-offset: 2px; }
.pbtn svg { position: absolute; inset: 9px; width: 20px; height: 20px; fill: currentColor; }
.pbtn svg.stroke { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.pbtn .i-play { display: none; }
.player.is-paused .pbtn .i-play { display: block; }
.player.is-paused .pbtn .i-pause { display: none; }
.pbtn .i-on { display: block; }
.pbtn .i-off { display: none; }
.player.is-muted .pbtn .i-on { display: none; }
.player.is-muted .pbtn .i-off { display: block; }

.player-time { flex: 1; height: 40px; display: flex; align-items: center; cursor: pointer; }
.player-track { position: relative; display: block; width: 100%; height: 4px; border-radius: 2px; background: rgba(23, 25, 28, 0.16); overflow: hidden; }
.player-fill { position: absolute; inset: 0; background: #1E6B50; transform: scaleX(0); transform-origin: left center; }

.player.is-full { border: 0; border-radius: 0; background: #000000; }
.player.is-full .player-video { background: #000000; }
.player.is-full .player-bar { left: var(--space-6); right: var(--space-6); bottom: var(--space-6); }

@media (max-width: 520px) {
  .player-bar { left: var(--space-2); right: var(--space-2); bottom: var(--space-2); gap: var(--space-1); }
  .pbtn { width: 34px; height: 34px; }
  .pbtn svg { inset: 6px; }
}

.shot figcaption {
  font-size: 13px;
  color: var(--text-subtle);
  margin-top: var(--space-2);
  text-align: center;
}

/* Sections */

.section { padding: var(--space-7) 0; border-top: 1px solid var(--border); }
.section-alt { background: var(--surface); }

.section-lede { color: var(--text-muted); margin-bottom: var(--space-5); }

.small { font-size: 14px; color: var(--text-subtle); }

.two-col { display: grid; gap: var(--space-6); }

@media (min-width: 860px) {
  .two-col { grid-template-columns: 1fr 1fr; gap: var(--space-7); }
}

.two-col p, .steps { max-width: 720px; }

/* Feature cards */

.features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--space-4) var(--space-5) var(--space-5);
}

.card p { color: var(--text-muted); margin: 0; font-size: 15px; }

.notice {
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--space-4) var(--space-5);
  margin: var(--space-6) 0;
}
.notice p:last-child { margin: 0; }
.notice-title { font-weight: 600; }
.notice code { background: var(--surface); }

.gallery {
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 760px) {
  .gallery { grid-template-columns: 1fr 1fr; }
}

/* Install */

.steps { padding-left: 1.25em; margin: 0; }
.steps li { margin-bottom: var(--space-3); padding-left: var(--space-1); }
.steps pre { margin: var(--space-2) 0; }

.table-wrap { overflow-x: auto; margin-bottom: var(--space-3); }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  background: var(--surface);
  border: 1px solid var(--border);
}

th, td {
  text-align: left;
  vertical-align: top;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--border);
}

thead th { font-size: 13px; color: var(--text-muted); background: var(--sunken); }
tbody th { font-weight: 600; white-space: nowrap; }

/* Footer */

.footer {
  border-top: 1px solid var(--border);
  background: var(--sunken);
  padding: var(--space-6) 0;
  font-size: 14px;
  color: var(--text-muted);
}
.footer p { max-width: 820px; }
.footer p:last-child { margin: 0; color: var(--text-subtle); }