/* ============================================================
   SMOCELL — Base: reset, typography, layout primitives
   ============================================================ */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: var(--t-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img, svg, video { display: block; max-width: 100%; }

button, input, select, textarea { font: inherit; color: inherit; }

button { cursor: pointer; background: none; border: none; padding: 0; }

[hidden] { display: none !important; }

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

::selection { background: var(--c-accent); color: var(--c-dark); }

/* ---------- Typography ---------- */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 550;
  letter-spacing: var(--track-head);
  line-height: var(--leading-head);
  text-wrap: balance;
}

.t-hero {
  font-family: var(--font-display);
  font-size: var(--t-hero);
  font-weight: 570;
  letter-spacing: var(--track-display);
  line-height: var(--leading-tight);
}

.t-h1 { font-size: var(--t-h1); letter-spacing: var(--track-display); line-height: 1.02; }
.t-h2 { font-size: var(--t-h2); }
.t-h3 { font-size: var(--t-h3); }
.t-h4 { font-size: var(--t-h4); }

.t-lead {
  font-size: var(--t-body-lg);
  line-height: 1.55;
  color: var(--c-ink-2);
  max-width: 34em;
  text-wrap: pretty;
}

.t-label {
  font-family: var(--font-mono);
  font-size: var(--t-label);
  font-weight: 500;
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--c-ink-3);
}

.t-label--accent { color: var(--c-accent-ink); }

.accent { color: var(--c-accent-ink); }

/* On dark surfaces */
.on-dark { color: var(--c-dark-ink); }
.on-dark .t-lead { color: var(--c-dark-ink-2); }
.on-dark .t-label { color: var(--c-dark-ink-3); }
.on-dark .t-label--accent,
.on-dark .accent { color: var(--c-accent); }
.on-dark ::selection { background: var(--c-accent); color: var(--c-dark); }

/* ---------- Layout primitives ---------- */

.container {
  width: 100%;
  max-width: calc(var(--layout-max) + 2 * var(--layout-gutter));
  margin-inline: auto;
  padding-inline: var(--layout-gutter);
}

.container--wide  { max-width: calc(var(--layout-wide) + 2 * var(--layout-gutter)); }
.container--narrow{ max-width: calc(var(--layout-narrow) + 2 * var(--layout-gutter)); }

.section { padding-block: var(--section-pad); position: relative; }
.section--sm { padding-block: var(--section-pad-sm); }
.section--soft { background: var(--c-bg-soft); }
.section--white { background: var(--c-surface); }
.section--dark {
  background: var(--c-dark);
  color: var(--c-dark-ink);
}
.section--dark2 { background: var(--c-dark-2); color: var(--c-dark-ink); }

/* Section header pattern */
.section-head { margin-bottom: clamp(2.5rem, 2rem + 3vw, 4.5rem); }
.section-head .t-label { display: block; margin-bottom: var(--space-4); }
.section-head p { margin-top: var(--space-5); }

/* ---------- Reveal-on-scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity var(--motion-page) var(--ease-out),
    transform var(--motion-page) var(--ease-out);
}
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 90ms; }
.reveal[data-delay="2"] { transition-delay: 180ms; }
.reveal[data-delay="3"] { transition-delay: 270ms; }
.reveal[data-delay="4"] { transition-delay: 360ms; }

/* ---------- Utility ---------- */

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: var(--space-3); left: var(--space-3);
  z-index: var(--z-modal);
  background: var(--c-ink);
  color: var(--c-bg);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  transform: translateY(-200%);
  transition: transform var(--motion-fast) var(--ease-out);
}
.skip-link:focus-visible { transform: none; }

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}