/**
 * Da'at Tec — Global Styles
 * Dark-first product marketing system
 */

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-background);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: var(--z-toast);
  padding: var(--space-3) var(--space-4);
  background: var(--color-accent);
  color: var(--color-text-inverse);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-md);
  transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ——— Layout ——— */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

.section {
  padding-block: var(--space-24);
  position: relative;
}

.section--surface {
  background-color: var(--color-surface);
}

.section--elevated {
  background-color: var(--color-surface-elevated);
}

.section--light {
  background-color: var(--color-surface-light);
  color: var(--color-text-on-light);
}

.section--light .heading-xl,
.section--light .heading-lg,
.section--light .heading-md,
.section--light .heading-sm,
.section--light .card__title,
.section--light .principle-card__title,
.section--light .why-item__title,
.section--light .process__title,
.section--light .metric__label,
.section--light .tech-category__title {
  color: var(--color-text-on-light);
}

.section--light .lead,
.section--light .body-text,
.section--light .card__body,
.section--light .principle-card__body,
.section--light .why-item__body,
.section--light .process__body,
.section--light .tech-category__desc,
.section--light .text-muted {
  color: var(--color-text-on-light-muted);
}

.section--light .eyebrow {
  color: var(--color-accent-dark);
}

.section--light .card {
  background: #fff;
  border-color: var(--color-border-light);
}

.section--compact {
  padding-block: var(--space-16);
}

.section-header {
  max-width: 44rem;
  margin-bottom: var(--space-12);
}

.section-header--center {
  margin-inline: auto;
  text-align: center;
}

.section-header--wide {
  max-width: 52rem;
}

.section-header--split {
  display: grid;
  gap: var(--space-6);
  max-width: none;
  margin-bottom: var(--space-14, var(--space-12));
}

/* ——— Typography ——— */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
}

.eyebrow::before {
  content: "";
  width: 1.25rem;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.heading-xl {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, var(--text-5xl));
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tighter);
  color: var(--color-text);
}

.heading-lg {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, var(--text-4xl));
  font-weight: var(--font-weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
}

.heading-md {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, var(--text-2xl));
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
}

.heading-sm {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  line-height: var(--leading-snug);
  color: var(--color-text);
}

.lead {
  margin-top: var(--space-5);
  font-size: clamp(1.05rem, 1.5vw, var(--text-lg));
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
}

.body-text {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
}

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

.text-gradient {
  background: linear-gradient(120deg, var(--color-accent-light) 0%, #fff 45%, var(--color-accent-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.text-link {
  color: var(--color-accent);
  font-weight: var(--font-weight-medium);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 0.22em;
  transition: text-decoration-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.text-link:hover {
  color: var(--color-accent-light);
  text-decoration-color: currentColor;
}

.section--light .text-link {
  color: var(--color-accent-dark);
}

/* ——— Grid helpers ——— */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid--2,
.grid--3,
.grid--4 {
  grid-template-columns: 1fr;
}

.flex {
  display: flex;
}

.flex--wrap {
  flex-wrap: wrap;
}

.flex--center {
  align-items: center;
  justify-content: center;
}

.flex--between {
  align-items: center;
  justify-content: space-between;
}

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.mt-0 { margin-top: 0; }

.spotlight-media-fill {
  position: absolute;
  inset: 0;
  border: 0;
  border-radius: 0;
}
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-10 { margin-top: var(--space-10); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }

.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;
}

.divider {
  border: 0;
  border-top: var(--border-width) solid var(--color-border);
  margin-block: var(--space-8);
}

.page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page__main {
  flex: 1;
}

/* ——— Reveal ——— */
[data-reveal] {
  opacity: 0;
  transform: translateY(1.75rem);
  transition:
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-delay="1"] { transition-delay: 90ms; }
[data-reveal-delay="2"] { transition-delay: 180ms; }
[data-reveal-delay="3"] { transition-delay: 270ms; }
[data-reveal-delay="4"] { transition-delay: 360ms; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}