/* white-bear.dev — dark by default, light on request. Every colour is a variable; nothing
   below this block hardcodes one, so re-theming means editing two lists. */

:root {
  --bg: #0a0f18;
  --bg-soft: #0f1622;
  --card: #111a27;
  --line: #1e2b3d;
  --ink: #e8eef7;
  --ink-dim: #93a3b8;
  --accent: #4cc9f0;
  --accent-ink: #04121b;
  --glow: rgba(76, 201, 240, .14);
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 12px 32px rgba(0, 0, 0, .35);
  --radius: 14px;
  --wrap: 1080px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f7f9fc;
  --bg-soft: #ffffff;
  --card: #ffffff;
  --line: #dfe6ef;
  --ink: #0d1b2a;
  --ink-dim: #56657a;
  --accent: #0b7fa8;
  --accent-ink: #ffffff;
  --glow: rgba(11, 127, 168, .10);
  --shadow: 0 1px 2px rgba(16, 32, 56, .06), 0 10px 28px rgba(16, 32, 56, .08);
  color-scheme: light;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f7f9fc;
    --bg-soft: #ffffff;
    --card: #ffffff;
    --line: #dfe6ef;
    --ink: #0d1b2a;
    --ink-dim: #56657a;
    --accent: #0b7fa8;
    --accent-ink: #ffffff;
    --glow: rgba(11, 127, 168, .10);
    --shadow: 0 1px 2px rgba(16, 32, 56, .06), 0 10px 28px rgba(16, 32, 56, .08);
    color-scheme: light;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  /* One soft light source behind the hero, so the page is not a flat rectangle. */
  background-image: radial-gradient(900px 500px at 50% -8%, var(--glow), transparent 70%);
  background-repeat: no-repeat;
}

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: 24px; }

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

h1, h2, h3 { line-height: 1.15; letter-spacing: -.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.1rem, 5.5vw, 3.4rem); font-weight: 650; max-width: 16ch; }
h2 { font-size: clamp(1.35rem, 2.6vw, 1.75rem); font-weight: 600; }
h3 { font-size: 1.12rem; font-weight: 600; }

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

.nav {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-block: 18px;
}
.nav .logo {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ink); font-weight: 620; letter-spacing: -.01em;
}
.nav .logo img { border-radius: 8px; display: block; }
.nav .logo span { color: var(--ink-dim); font-weight: 450; }
.nav nav { display: flex; align-items: center; gap: 20px; font-size: .95rem; }
.nav nav a { color: var(--ink-dim); }
.nav nav a:hover { color: var(--ink); text-decoration: none; }

.theme-toggle {
  background: none; border: 1px solid var(--line); color: var(--ink-dim);
  width: 34px; height: 34px; border-radius: 50%; cursor: pointer; font-size: 15px;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--accent); }

/* --- sections -------------------------------------------------------------- */

main > section { padding-block: 56px; border-top: 1px solid var(--line); }
main > section:first-child { border-top: 0; }

.hero { padding-block: clamp(64px, 12vh, 120px) 72px; }
.eyebrow {
  font: 500 .78rem/1 var(--mono); letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 20px;
}
.lede { color: var(--ink-dim); font-size: 1.1rem; max-width: 62ch; }
.hint { color: var(--ink-dim); font-size: .9rem; max-width: 62ch; }

.btn {
  display: inline-block; padding: 11px 20px; border-radius: 10px;
  background: var(--accent); color: var(--accent-ink);
  font-weight: 560; font-size: .97rem; border: 1px solid transparent; cursor: pointer;
}
.btn:hover { text-decoration: none; filter: brightness(1.08); }
.btn--ghost { background: none; color: var(--ink); border-color: var(--line); margin-left: 8px; }
.btn--ghost:hover { border-color: var(--accent); filter: none; }

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

.grid {
  display: grid; gap: 18px; margin-top: 28px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; transition: border-color .15s, transform .15s, box-shadow .15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.card h3 a { color: var(--ink); }
.card p { color: var(--ink-dim); font-size: .97rem; margin: 0 0 12px; }
.card p:last-child { margin-bottom: 0; }
.card .tag { font: 500 .78rem/1.5 var(--mono); color: var(--accent); letter-spacing: .02em; }
.card .links { font-size: .9rem; color: var(--line); }

.badge {
  display: inline-block; margin-left: 6px; padding: 2px 8px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink-dim); font-size: .72rem; letter-spacing: .04em;
}

/* --- signup ---------------------------------------------------------------- */

.signup { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 12px; max-width: 520px; }
.signup input[type="email"] {
  flex: 1 1 240px; padding: 11px 14px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg-soft); color: var(--ink); font: inherit;
  font-size: .97rem;
}
.signup input[type="email"]:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.alert {
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: 8px; padding: 10px 14px; background: var(--bg-soft); max-width: 520px;
}
.alert--error { border-left-color: #ef6461; }

.contact { font-size: 1.05rem; }

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

.foot {
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between;
  border-top: 1px solid var(--line); padding-block: 28px 40px; margin-top: 40px;
  color: var(--ink-dim); font-size: .9rem;
}
.foot a { color: var(--ink-dim); }
.foot a:hover { color: var(--accent); }

/* --- prose (privacy) -------------------------------------------------------- */

.prose { max-width: 68ch; }
.prose p, .prose li { color: var(--ink-dim); }
.prose h2 { margin-top: 2em; }

@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
  .card:hover { transform: none; }
}