/*
  Ice Forge — lightweight, no-build CSS.
  - Dark-first with light mode via prefers-color-scheme.
  - Uses system fonts, crisp spacing, and accessible focus styles.
*/

:root {
  color-scheme: light dark;

  /* Light-first, Databricks-like clarity. Dark mode via prefers-color-scheme. */
  --bg: #ffffff;
  --surface: rgba(17, 24, 39, 0.04);
  --surface-2: rgba(17, 24, 39, 0.06);
  --border: rgba(17, 24, 39, 0.12);
  --text: #0f172a;
  --muted: #475569;

  /* Databricks-adjacent warm accent */
  --accent: #ff3621;
  --accent-2: #ff7a18;

  /* Links follow accent for a product feel */
  --link: color-mix(in srgb, var(--accent) 85%, #000 15%);
  --link-hover: color-mix(in srgb, var(--accent-2) 85%, #000 15%);

  --shadow: 0 10px 26px rgba(15, 23, 42, 0.10);
  --radius: 16px;
  --wrap: 1040px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f14;
    --surface: rgba(255, 255, 255, 0.04);
    --surface-2: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.10);
    --text: #e6edf3;
    --muted: #a7b1bd;
    --shadow: 0 14px 34px rgba(0, 0, 0, 0.35);
  }
}

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Inter, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  background:
    radial-gradient(900px 540px at 18% -10%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 60%),
    radial-gradient(700px 420px at 92% 0%, color-mix(in srgb, var(--accent-2) 16%, transparent), transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
}

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

a:hover {
  color: var(--link-hover);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 40%, transparent);
  outline-offset: 3px;
  border-radius: 10px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip:focus {
  position: fixed;
  left: 16px;
  top: 16px;
  width: auto;
  height: auto;
  padding: 10px 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  z-index: 1000;
}

.wrap {
  width: min(var(--wrap), calc(100% - 48px));
  margin: 0 auto;
}

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.topbar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
}

.wordmark__name {
  font-weight: 700;
  letter-spacing: 0.02em;
}

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

.nav {
  display: inline-flex;
  gap: 18px;
  align-items: center;
}

.nav a {
  color: var(--muted);
  font-weight: 600;
}

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

/* Hero */
.hero {
  padding: 68px 0 36px;
  text-align: center;
}

.hero__brand {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 18px;
}

.hero__title {
  margin: 0 auto 14px;
  max-width: 28ch;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.hero__lead {
  margin: 0 auto 22px;
  max-width: 64ch;
  color: var(--muted);
  font-size: 1.1rem;
}

.hero__cta {
  display: inline-flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b0f14;
  font-weight: 700;
  border: 1px solid color-mix(in srgb, var(--accent) 55%, #000 45%);
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.12);
}

.btn:hover {
  filter: brightness(1.05);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
}

.btn--ghost:hover {
  background: var(--surface);
}

/* Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
  padding: 16px 0 48px;
}

.card {
  grid-column: span 12;
  padding: 18px 18px 16px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  letter-spacing: 0.01em;
}

.card p {
  margin: 0 0 12px;
  color: var(--muted);
}

.card__link {
  display: inline-flex;
  font-weight: 700;
}

@media (min-width: 820px) {
  .card {
    grid-column: span 4;
  }
}

/* Footer */
.footer {
  padding: 16px 0 48px;
  border-top: 1px solid var(--border);
}

.footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer__links {
  margin-top: 8px;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.footer__links a {
  color: var(--muted);
  font-weight: 600;
}

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

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

/* Iceforge brand mark swapping */
.iceforge-mark {
  width: 140px;
  height: auto;
  display: block;
}

.iceforge-mark--dark {
  display: block;
}

.iceforge-mark--light {
  display: none;
}

@media (prefers-color-scheme: light) {
  .iceforge-mark--dark {
    display: none;
  }
  .iceforge-mark--light {
    display: block;
  }
}

@media (max-width: 520px) {
  .topbar .wrap {
    padding: 12px 0;
  }
  .wordmark__tag {
    display: none;
  }
}