/* ============================================================
   RESET + BASE
   ============================================================ */

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

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

@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;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

ul { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4, p { margin: 0; }

/* Focus visibility — accessibility requirement */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--bg);
  padding: 0.75rem 1.25rem;
  z-index: 1000;
  font-size: 0.9rem;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */

.wrap {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-pad);
}

.section-alt {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 1.4em;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  max-width: 44rem;
}

.section-title {
  font-size: var(--step-3);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.08;
}

.section-lede {
  color: var(--muted);
  font-size: var(--step-1);
  max-width: 38ch;
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.divider {
  height: 1px;
  background: var(--border);
  border: none;
  margin: 0;
}

.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;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.95rem 1.6rem;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { background: var(--accent); border-color: var(--accent); transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--border-strong);
}
.btn-outline:hover { border-color: var(--ink); transform: translateY(-1px); }

.btn-ghost-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.55);
}
.btn-ghost-light:hover { border-color: #fff; background: rgba(255,255,255,0.08); }

.btn-arrow { transition: transform var(--dur-fast) var(--ease); }
.btn:hover .btn-arrow { transform: translateX(3px); }

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Placeholder tag used on unverified data (e.g. contact) */
.placeholder-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: var(--accent-2-tint);
  padding: 0.15em 0.5em;
  border-radius: var(--radius);
  margin-left: 0.6em;
}