/* ============================================
   BASE — Reset, typography, globals
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  color: var(--color-frost);
  background-color: var(--color-void);
  overflow-x: hidden;
}

/* ── Selection ── */
::selection {
  background: var(--color-accent);
  color: var(--color-white);
}

/* ── Links ── */
a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

a:hover {
  color: var(--color-white);
}

/* ── Images ── */
img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-tight);
  color: var(--color-white);
}

h1 { font-size: var(--fs-hero); }
h2 { font-size: var(--fs-h1); }
h3 { font-size: var(--fs-h2); }
h4 { font-size: var(--fs-h3); }

p {
  color: var(--color-titanium);
  max-width: var(--max-width-text);
}

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

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

.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* ── Section base ── */
.section {
  padding: var(--section-padding) 0;
  position: relative;
}

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

.section--gradient {
  background: linear-gradient(180deg, var(--color-void) 0%, var(--color-obsidian) 50%, var(--color-void) 100%);
}

/* ── Divider ── */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-graphite), transparent);
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-void);
}
::-webkit-scrollbar-thumb {
  background: var(--color-graphite);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-steel);
}