/* ═══════════════════════════════════════════
   OmniFlow Layout
   Mobile-first. Breakpoints: 768px, 1280px
   ═══════════════════════════════════════════ */

/* ── Reset ── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: auto; /* Lenis handles smooth scroll */
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-8);
  }
}

@media (min-width: 1280px) {
  .container {
    padding: 0 var(--space-12);
  }
}

/* ── Section base ── */
.section {
  position: relative;
  z-index: 1;
  background: var(--color-bg-primary);
  padding: var(--space-20) 0;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}

.section--alt {
  background: var(--color-bg-secondary);
}

/* ── Section label (eyebrow text) ── */
.section__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

/* ── Section headline ── */
.section__headline {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

/* ── Section subtitle ── */
.section__subtitle {
  font-size: clamp(0.95rem, 2vw, 1.125rem);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin-bottom: var(--space-12);
}

/* ── Grid utilities ── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ── Typography ── */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: opacity var(--duration-hover) var(--ease-default);
}

a:hover {
  opacity: 0.8;
}

/* ── Button base ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-pill);
  transition:
    transform var(--duration-hover) var(--ease-default),
    box-shadow var(--duration-hover) var(--ease-default);
  min-height: 44px;
  min-width: 44px;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  font-size: 1rem;
  color: #fff;
  background: var(--color-gradient);
  padding: 0.85rem 2rem;
}

.btn--primary:hover {
  box-shadow: 0 12px 32px rgba(24, 148, 232, 0.35);
}

.btn--ghost {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-primary);
  background: transparent;
  border: 1px solid var(--color-border);
  padding: 0.85rem 2rem;
}

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

.btn--nav {
  font-size: 0.875rem;
  color: #fff;
  background: var(--color-gradient);
  padding: 0.5rem 1.25rem;
}

.btn--nav:hover {
  box-shadow: 0 8px 24px rgba(24, 148, 232, 0.3);
}

/* ── Card base ── */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card-lg);
  padding: var(--space-8);
  transition:
    background var(--duration-hover) var(--ease-default),
    border-color var(--duration-hover) var(--ease-default);
}

.card:hover {
  background: var(--color-bg-elevated);
}

/* ── Visually hidden (a11y) ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}