/* =============================================================================
   Hambone — Landing styles
   Every value below resolves through a token from tokens.css / themes.css.
   No literal colors, sizes, or timings live here.
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: var(--bg);
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-md);
  line-height: var(--lh-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background var(--dur-slow) var(--ease-in-out),
              color var(--dur-slow) var(--ease-in-out);
  overflow-x: hidden;
}

/* --- Film grain overlay (intensity driven by theme --grain) ------------- */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  pointer-events: none;
  opacity: var(--grain);
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  animation: grain var(--dur-slower) steps(4) infinite;
}
@media (prefers-reduced-motion: reduce) { body::after { animation: none; } }
@keyframes grain {
  0%,100% { transform: translate(0,0); }
  25% { transform: translate(-2%, 1%); }
  50% { transform: translate(1%, -2%); }
  75% { transform: translate(-1%, 2%); }
}

/* --- Typography --------------------------------------------------------- */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: var(--display-weight);
  line-height: var(--lh-tight);
  letter-spacing: var(--display-tracking);
  text-transform: var(--display-transform);
  margin: 0;
}
p { margin: 0; max-width: var(--measure); }
a { color: inherit; }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--accent);
}

/* --- Layout ------------------------------------------------------------- */
.container { width: min(100% - var(--space-8), var(--container)); margin-inline: auto; }
.container--narrow { width: min(100% - var(--space-8), var(--container-narrow)); margin-inline: auto; }
.section { padding-block: var(--space-16); }
.stack > * + * { margin-top: var(--space-4); }

/* --- Nav ---------------------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: var(--z-nav);
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: var(--border-hair) solid var(--line);
}
.nav__brand {
  font-family: var(--font-display);
  font-weight: var(--display-weight);
  font-size: var(--fs-lg);
  letter-spacing: var(--display-tracking);
  text-transform: var(--display-transform);
  text-decoration: none;
}
.nav__links { display: flex; align-items: center; gap: var(--space-5); }
.nav__link {
  text-decoration: none; color: var(--ink-dim);
  font-size: var(--fs-sm); letter-spacing: var(--tracking-wide);
  text-transform: uppercase; transition: color var(--dur-fast) var(--ease-out);
}
.nav__link:hover { color: var(--ink); }
@media (max-width: 640px) { .nav__links .nav__link { display: none; } }

/* --- Buttons ------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  min-height: var(--touch);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-pill);
  border: var(--border-thin) solid transparent;
  font-family: var(--font-body); font-size: var(--fs-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide); text-transform: uppercase;
  text-decoration: none; cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-spring),
              box-shadow var(--dur-base) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn--primary {
  background: var(--accent); color: var(--accent-ink);
  box-shadow: 0 0 calc(24px * var(--glow)) color-mix(in srgb, var(--accent) 60%, transparent);
}
.btn--primary:hover {
  background: var(--accent-2);
  box-shadow: 0 0 calc(40px * var(--glow)) color-mix(in srgb, var(--accent) 75%, transparent),
              var(--shadow-md);
}
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

/* --- Hero --------------------------------------------------------------- */
.hero { position: relative; padding-block: var(--space-20) var(--space-16); overflow: hidden; }
.hero__glow {
  position: absolute; inset: 0; z-index: var(--z-base); pointer-events: none;
  background:
    radial-gradient(60% 50% at 50% 0%, color-mix(in srgb, var(--accent) calc(18% * var(--glow)), transparent), transparent 70%),
    radial-gradient(40% 40% at 15% 90%, color-mix(in srgb, var(--surface) 40%, transparent), transparent 70%);
}
.hero__inner { position: relative; z-index: var(--z-raised); text-align: center; }
.hero h1 {
  font-size: var(--fs-display);
  margin-block: var(--space-5) var(--space-4);
}
.hero__title-accent { color: var(--accent); }
.hero__sub {
  margin-inline: auto;
  font-size: var(--fs-lg);
  color: var(--ink-dim);
  max-width: 42ch;
}
.hero__cta { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; margin-top: var(--space-8); }

/* Marquee bulb rule under the title (decorative, theme-aware) */
.marquee-rule {
  height: 2px; width: min(420px, 60%); margin: var(--space-6) auto 0;
  background: repeating-linear-gradient(90deg,
    var(--accent) 0 6px, transparent 6px 16px);
  box-shadow: 0 0 calc(12px * var(--glow)) var(--accent);
  opacity: 0.8;
}

/* --- Feature grid ------------------------------------------------------- */
.grid { display: grid; gap: var(--space-6); grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  background: color-mix(in srgb, var(--surface) 60%, transparent);
  border: var(--border-hair) solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out);
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); background: color-mix(in srgb, var(--surface) 85%, transparent); }
.card__num {
  font-family: var(--font-display); font-size: var(--fs-xl);
  color: var(--accent); font-weight: var(--display-weight);
}
.card h3 { font-size: var(--fs-lg); margin-block: var(--space-3) var(--space-2); }
.card p { color: var(--ink-dim); font-size: var(--fs-sm); }

/* --- Steps -------------------------------------------------------------- */
.steps { display: grid; gap: var(--space-8); grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); counter-reset: step; }
.step { position: relative; padding-top: var(--space-6); }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-family: var(--font-display); font-size: var(--fs-2xl);
  color: var(--accent); opacity: 0.9; letter-spacing: var(--tracking-tight);
}
.step h3 { font-size: var(--fs-lg); margin-block: var(--space-2); }
.step p { color: var(--ink-dim); font-size: var(--fs-sm); }

/* --- Section heading ---------------------------------------------------- */
.section-head { text-align: center; margin-bottom: var(--space-10); }
.section-head h2 { font-size: var(--fs-2xl); margin-top: var(--space-3); }
.section-head p { margin-inline: auto; color: var(--ink-dim); margin-top: var(--space-3); }

/* --- Footer ------------------------------------------------------------- */
.footer {
  border-top: var(--border-hair) solid var(--line);
  padding-block: var(--space-8);
  color: var(--ink-faint); font-size: var(--fs-sm);
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-4);
}
.footer a { color: var(--ink-dim); text-decoration: none; }
.footer a:hover { color: var(--accent); }

/* --- Reveal-on-scroll --------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* --- Focus visibility (accessibility) ----------------------------------- */
:focus-visible { outline: var(--border-thin) solid var(--focus); outline-offset: 3px; border-radius: var(--radius-sm); }

/* --- Utility ------------------------------------------------------------ */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: var(--space-4); top: -100px; z-index: var(--z-modal);
  background: var(--accent); color: var(--accent-ink); padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md); text-decoration: none; transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: var(--space-4); }