/* ============================================================
   BASE — reset, typography, layout primitives, nav, footer
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--surface-light);
  color: var(--text-on-light);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
}

img { max-width: 100%; display: block; }
svg { display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }

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

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -60px;
  background: var(--ink);
  color: var(--text-on-dark);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: var(--z-modal);
  transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: var(--space-3); }

h1, h2, h3, .font-display {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: var(--lh-tight);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-warm);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-4);
}
@media (min-width: 768px) { .container { padding-inline: var(--space-6); } }

.container-narrow {
  max-width: var(--container-narrow);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

section { padding-block: var(--space-8); }
.section-tight { padding-block: var(--space-6); }

.surface-dark { background: var(--surface-dark); color: var(--text-on-dark); }
.surface-dark .eyebrow { color: var(--accent-cold); }
.surface-raised { background: var(--surface-dark-raised); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0 var(--space-5);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
  touch-action: manipulation;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--accent-warm);
  color: #1a0f06;
}
.btn-primary:hover { background: var(--ember-strong); box-shadow: var(--shadow-md); }
.btn-ghost {
  background: transparent;
  border-color: currentColor;
  color: inherit;
}
.btn-ghost:hover { background: rgba(127, 224, 236, 0.1); border-color: var(--accent-cold); }
.btn-block { width: 100%; }

/* Nav */
.site-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(12, 15, 17, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.site-nav__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 76px;
}
.site-nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-on-dark);
  white-space: nowrap;
  flex-shrink: 0;
}
.brand-logo {
  display: block;
  height: clamp(28px, 6vw, 44px);
  width: auto;
  max-width: 42vw;
}
.site-nav__links {
  display: none;
  align-items: center;
  gap: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
@media (min-width: 900px) { .site-nav__links { display: flex; } }
.site-nav__links a {
  color: var(--text-on-dark-muted);
  position: relative;
  padding-block: var(--space-1);
  transition: color var(--dur-fast) var(--ease-out);
}
.site-nav__links a:hover, .site-nav__links a[aria-current="page"] { color: var(--text-on-dark); }
.site-nav__links a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: var(--accent-cold);
}
.site-nav__actions { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }
.site-nav .btn-primary { display: none; }
@media (min-width: 480px) { .site-nav .btn-primary { display: inline-flex; } }
.site-nav__phone {
  display: none;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-on-dark);
}
@media (min-width: 640px) { .site-nav__phone { display: inline-flex; } }
.site-nav .btn-primary { min-height: 44px; padding-inline: var(--space-4); font-size: var(--fs-xs); }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  color: var(--text-on-dark);
}
@media (min-width: 900px) { .nav-toggle { display: none; } }
.nav-toggle svg { width: 20px; height: 20px; }

.mobile-menu {
  position: fixed;
  inset: 76px 0 0 0;
  background: var(--ink);
  z-index: calc(var(--z-nav) - 1);
  padding: var(--space-6) var(--space-4);
  display: none;
}
.mobile-menu.is-open { display: block; }
@media (min-width: 900px) { .mobile-menu { display: none !important; } }
.mobile-menu a {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  text-transform: uppercase;
  color: var(--text-on-dark);
  padding-block: var(--space-3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.mobile-menu a[aria-current="page"] { color: var(--accent-cold); }
.mobile-menu__contact {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* Footer */
.site-footer {
  background: var(--ink);
  color: var(--text-on-dark-muted);
  padding-block: var(--space-7) var(--space-5);
}
.site-footer__grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .site-footer__grid { grid-template-columns: 1.4fr 1fr 1fr; }
}
.site-footer h3 {
  font-size: var(--fs-md);
  color: var(--text-on-dark);
  margin-bottom: var(--space-3);
}
.site-footer__brand {
  margin-bottom: var(--space-4);
}
.site-footer__brand .brand-logo {
  height: clamp(32px, 7vw, 52px);
  max-width: 60vw;
}
.site-footer a { transition: color var(--dur-fast) var(--ease-out); }
.site-footer a:hover { color: var(--text-on-dark); }
.site-footer ul li { margin-bottom: var(--space-2); }
.site-footer__social { display: flex; gap: var(--space-3); margin-top: var(--space-4); }
.site-footer__social a {
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
}
.site-footer__social svg { width: 18px; height: 18px; }
.site-footer__bottom {
  margin-top: var(--space-7);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
  font-size: var(--fs-2xs);
  font-family: var(--font-mono);
}

.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;
}