/* ─── CSS CUSTOM PROPERTIES ─── */
:root {
  --bg: #080808;
  --surface: #0f0f0f;
  --card: #141414;
  --card-hover: #191919;
  --border: #1e1e1e;
  --border-light: #282828;
  --cyan: #00d4ff;
  --cyan-dim: rgba(0, 212, 255, 0.10);
  --purple: #8b5cf6;
  --purple-dim: rgba(139, 92, 246, 0.10);
  --green: #10b981;
  --green-dim: rgba(16, 185, 129, 0.10);
  --amber: #f59e0b;
  --amber-dim: rgba(245, 158, 11, 0.10);
  --red: #f87171;
  --red-dim: rgba(248, 113, 113, 0.10);
  --text: #e5e5e5;
  --text-muted: #959595;
  --text-faint: #3a3a3a;
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Inter', sans-serif;
  --nav-h: 56px;
  --section-pad: 5rem;
  --container-w: 1120px;
  --r-sm: 4px;
  --r: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* noise grain overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.022;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

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

ul,
ol {
  list-style: none;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar {
  width: 3px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: 2px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-faint);
}

/* ─── CONTAINER ─── */
.container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 2rem;
}

/* ─── SECTION HEADER ─── */
.section-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--cyan);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.section-title {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.section-title span {
  color: var(--cyan);
}

.section-desc {
  margin-top: 0.8rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 580px;
  line-height: 1.75;
}

.section-header {
  margin-bottom: 3rem;
}

/* ─── DIVIDERS ─── */
.glow-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 30%, var(--purple) 70%, transparent);
  opacity: 0.28;
}

/* ─── SCROLL PROGRESS BAR ─── */
#scroll-progress {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  z-index: 200;
  transition: width 0.08s linear;
}