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

:root {
  color-scheme: light;
  --bg: #fafafb;
  --bg-soft: #f1f1f4;
  --surface: #ffffff;
  --fg: #1d1d1f;
  --muted: #5e5e66;
  --line: rgba(0, 0, 0, 0.09);
  --accent: #1c71d8;
  --accent-fg: #ffffff;
  --accent-soft: rgba(28, 113, 216, 0.1);
  --kbd-bg: #ffffff;
  --kbd-line: rgba(0, 0, 0, 0.16);
  --code-bg: #f1f1f4;
  --topbar: rgba(0, 0, 0, 0.82);
  /* GNOME-ish wallpaper behind the screenshots */
  --wall:
    radial-gradient(120% 90% at 10% 0%, #9cc4f5 0%, transparent 55%),
    radial-gradient(90% 80% at 100% 20%, #c9b6f2 0%, transparent 55%),
    radial-gradient(100% 100% at 50% 110%, #f6c7a6 0%, transparent 60%),
    linear-gradient(160deg, #dfe8f7, #efe6f6);
  --card-wall:
    radial-gradient(100% 120% at 0% 0%, rgba(98, 160, 234, 0.28), transparent 60%),
    radial-gradient(100% 120% at 100% 100%, rgba(192, 166, 240, 0.28), transparent 60%),
    var(--bg-soft);
  --show-light: block;
  --show-dark: none;
}

/* Dark tokens, used for the system preference and for the explicit switch. */
@media (prefers-color-scheme: dark) {
  :root:not(:has(#theme-light:checked)) {
    color-scheme: dark;
    --bg: #161618;
    --bg-soft: #1f1f22;
    --surface: #222225;
    --fg: #f2f2f4;
    --muted: #a0a0aa;
    --line: rgba(255, 255, 255, 0.09);
    --accent: #78aeed;
    --accent-fg: #0b1a2e;
    --accent-soft: rgba(120, 174, 237, 0.14);
    --kbd-bg: #2a2a2e;
    --kbd-line: rgba(255, 255, 255, 0.16);
    --code-bg: #232327;
    --topbar: rgba(0, 0, 0, 0.9);
    --wall:
      radial-gradient(120% 90% at 10% 0%, #1d3f73 0%, transparent 55%),
      radial-gradient(90% 80% at 100% 20%, #3b2a68 0%, transparent 55%),
      radial-gradient(100% 100% at 50% 110%, #5a3328 0%, transparent 60%),
      linear-gradient(160deg, #10172a, #1b1427);
    --card-wall:
      radial-gradient(100% 120% at 0% 0%, rgba(53, 132, 228, 0.22), transparent 60%),
      radial-gradient(100% 120% at 100% 100%, rgba(145, 65, 172, 0.22), transparent 60%),
      var(--bg-soft);
    --show-light: none;
    --show-dark: block;
  }
}

:root:has(#theme-dark:checked) {
  color-scheme: dark;
  --bg: #161618;
  --bg-soft: #1f1f22;
  --surface: #222225;
  --fg: #f2f2f4;
  --muted: #a0a0aa;
  --line: rgba(255, 255, 255, 0.09);
  --accent: #78aeed;
  --accent-fg: #0b1a2e;
  --accent-soft: rgba(120, 174, 237, 0.14);
  --kbd-bg: #2a2a2e;
  --kbd-line: rgba(255, 255, 255, 0.16);
  --code-bg: #232327;
  --topbar: rgba(0, 0, 0, 0.9);
  --wall:
    radial-gradient(120% 90% at 10% 0%, #1d3f73 0%, transparent 55%),
    radial-gradient(90% 80% at 100% 20%, #3b2a68 0%, transparent 55%),
    radial-gradient(100% 100% at 50% 110%, #5a3328 0%, transparent 60%),
    linear-gradient(160deg, #10172a, #1b1427);
  --card-wall:
    radial-gradient(100% 120% at 0% 0%, rgba(53, 132, 228, 0.22), transparent 60%),
    radial-gradient(100% 120% at 100% 100%, rgba(145, 65, 172, 0.22), transparent 60%),
    var(--bg-soft);
  --show-light: none;
  --show-dark: block;
}

.only-light { display: var(--show-light); }
.only-dark  { display: var(--show-dark); }

/* ------------------------------------------------------------------ base */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Ubuntu Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; }

code, pre, kbd { font-family: "Ubuntu Sans Mono", ui-monospace, monospace; }

code {
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 5px;
}

kbd {
  display: inline-block;
  font-size: 0.82em;
  line-height: 1;
  padding: 0.22em 0.45em 0.28em;
  background: var(--kbd-bg);
  border: 1px solid var(--kbd-line);
  border-bottom-width: 3px;
  border-radius: 8px;
  vertical-align: 0.08em;
}

.wrap {
  width: 100%;
  max-width: 1080px;
  margin-inline: auto;
  padding-inline: 16px;
}

.muted { color: var(--muted); }
.small { font-size: 0.88rem; }

/* Radios carry the theme state; they stay focusable for keyboard users. */
.theme-radio {
  position: fixed; /* fixed, so focusing one never scrolls the page */
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* ------------------------------------------------------------------- nav */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  font-weight: 700;
  font-size: 1.1rem;
}
.brand:hover { text-decoration: none; }

.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--muted); font-size: 0.95rem; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }

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

.hero {
  text-align: center;
  padding-top: clamp(32px, 7vw, 72px);
}

.eyebrow {
  display: inline-block;
  margin: 0 0 20px;
  padding: 4px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
}
.hero h1 kbd { font-size: 0.62em; border-radius: 10px; }

.lede {
  max-width: 34rem;
  margin: 20px auto 0;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--muted);
}

.cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 11px 22px;
  border-radius: 999px;
  font-weight: 500;
  color: var(--fg);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: transform 0.15s ease, background-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: transparent;
}

/* The "desktop" the hero screenshot sits on. */
.stage {
  position: relative;
  margin: clamp(40px, 7vw, 64px) 0 0;
  aspect-ratio: 16 / 9;
  border-radius: 16px;
  overflow: hidden;
  background: var(--wall);
  border: 1px solid var(--line);
  box-shadow: 0 30px 80px -30px rgba(20, 30, 60, 0.35);
}

.topbar {
  position: absolute;
  inset: 0 0 auto;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: 14px;
  background: var(--topbar);
  color: #fff;
  font-size: 13px;
  font-weight: 500;
}
.topbar .dots, .topbar .tray { display: flex; gap: 5px; align-items: center; }
.topbar .dots i { width: 6px; height: 6px; border-radius: 50%; background: rgba(255,255,255,.55); }
.topbar .dots i:first-child { width: 18px; border-radius: 4px; background: #fff; }
.topbar .tray i { width: 12px; height: 12px; border-radius: 3px; background: rgba(255,255,255,.7); }

.stage-shot {
  position: absolute;
  left: 50%;
  top: 18%;
  width: min(78%, 732px);
  transform: translateX(-50%);
}
.stage-shot img { width: 100%; }

.theme-switch {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin-top: 22px;
}
.switch-label { color: var(--muted); font-size: 0.95rem; }

.segmented {
  display: inline-flex;
  padding: 3px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.segmented label {
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.segmented label:hover { color: var(--fg); }

:root:has(#theme-system:checked) label[for="theme-system"],
:root:has(#theme-light:checked) label[for="theme-light"],
:root:has(#theme-dark:checked) label[for="theme-dark"] {
  background: var(--surface);
  color: var(--fg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.14);
}

:root:has(#theme-system:focus-visible) label[for="theme-system"],
:root:has(#theme-light:focus-visible) label[for="theme-light"],
:root:has(#theme-dark:focus-visible) label[for="theme-dark"] {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

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

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: clamp(56px, 9vw, 96px);
  text-align: center;
}
.stats div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stats strong {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  letter-spacing: -0.02em;
}
.stats span { color: var(--muted); font-size: 0.9rem; }

/* -------------------------------------------------------------- features */

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: clamp(56px, 9vw, 96px);
  scroll-margin-top: 24px;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
}

.card-text { padding: 26px 28px 20px; }
.card h2 { font-size: 1.3rem; }
.card p { margin: 8px 0 0; color: var(--muted); }

.card-shot {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 8px 20px;
  background: var(--card-wall);
  border-top: 1px solid var(--line);
}
.card-shot img { width: 100%; max-width: 560px; }

/* ------------------------------------------------------------ theme band */

.theme-band {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  align-items: center;
  gap: clamp(24px, 5vw, 56px);
  margin-top: clamp(56px, 9vw, 96px);
}
.theme-copy h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); }
.theme-copy p { color: var(--muted); margin: 12px 0 0; }

/* Light on the left, dark on the right, cut on a diagonal. */
.split {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
}
/* Both layers are identical boxes, so one clip-path cuts wallpaper and
   screenshot along the same line. */
.split-layer { padding: 7% 4%; }
.split-layer img { display: block; width: 100%; }
.split-light {
  background:
    radial-gradient(120% 90% at 0% 0%, #9cc4f5 0%, transparent 60%),
    linear-gradient(160deg, #dfe8f7, #efe6f6);
}
.split-dark {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 100% 100%, #3b2a68 0%, transparent 60%),
    linear-gradient(160deg, #10172a, #1b1427);
  clip-path: polygon(62% 0, 100% 0, 100% 100%, 38% 100%);
}

/* --------------------------------------------------------------- install */

.install {
  margin-top: clamp(64px, 10vw, 112px);
  scroll-margin-top: 24px;
}
.install h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); }
.install > .muted { margin: 8px 0 0; }

.steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 28px;
}
.step {
  min-width: 0;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
}
.step h3 { font-size: 1.05rem; }
.step p { margin: 12px 0 0; }

pre {
  margin: 14px 0 0;
  padding: 16px 18px;
  background: var(--code-bg);
  border-radius: 12px;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.7;
}
pre code { background: none; padding: 0; font-size: inherit; }

.then {
  margin: 28px 0 0;
  font-size: 1.15rem;
  font-weight: 500;
}

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

.footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin-top: clamp(64px, 10vw, 112px);
  padding-block: 28px 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

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

@media (max-width: 820px) {
  .features, .steps, .theme-band { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .nav-links { gap: 16px; }
  .nav-links a[href="#features"] { display: none; }
  .stage { aspect-ratio: 5 / 4; border-radius: 12px; }
  .stage-shot { width: 100%; top: 16%; }
  .topbar { font-size: 11px; height: 24px; }
  .card-text { padding: 22px 20px 16px; }
  .step { padding: 20px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  body, .btn, .segmented label { transition: none; }
}