/* Reset + typography + layout primitives */

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--text);
  background-color: var(--bg);
  background-image: url("/assets/voice-wave-95f48c57.svg");
  background-repeat: no-repeat;
  background-size: cover;
  background-attachment: fixed;
  background-position: center center;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--brand);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}
a:hover { color: var(--cc-sky); }

h1, h2, h3, h4, h5 {
  margin: 0 0 var(--space-4);
  font-family: var(--font-display);
  font-weight: var(--fw-semi);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  color: var(--text);
}

h1 { font-size: clamp(2.25rem, 4.5vw, var(--fs-5xl)); letter-spacing: -0.035em; font-weight: var(--fw-bold); }
h2 { font-size: clamp(1.75rem, 3vw, var(--fs-4xl)); letter-spacing: -0.03em; }
h3 { font-size: var(--fs-2xl); letter-spacing: -0.02em; }
h4 { font-size: var(--fs-xl); letter-spacing: -0.01em; }

p { margin: 0 0 var(--space-4); color: var(--text-muted); }

ul, ol { margin: 0 0 var(--space-4); padding-left: var(--space-5); color: var(--text-muted); }

hr { border: 0; height: 1px; background: var(--border); margin: var(--space-7) 0; }

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 2px 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

section { padding: var(--space-9) 0; position: relative; }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: var(--space-3);
}

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

.lead {
  font-size: var(--fs-lg);
  line-height: var(--lh-normal);
  color: var(--text-muted);
  max-width: 60ch;
}

.section-head {
  max-width: 760px;
  margin: 0 auto var(--space-7);
  text-align: center;
}
.section-head .lead { margin-inline: auto; }

/* Scroll reveal (JS toggles .is-visible) */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* Accessibility: respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Grid helpers */
.grid { display: grid; gap: var(--space-5); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}
@media (max-width: 1100px) and (min-width: 901px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}