@tailwind base;
@tailwind components;
@tailwind utilities;

/* ── DESIGN TOKENS ── */
:root {
  --font-geist-sans: 'Geist', system-ui, sans-serif;
  --font-geist-mono: 'Geist Mono', monospace;

  /* Light base */
  --bg:        #f9fafb;

  /* Light surface steps (for shadows / borders if needed) */
  --s1:        #ffffff;
  --s2:        #f3f4f6;
  --s3:        #e5e7eb;
  --s4:        #d1d5db;

  /* Borders tuned for light theme */
  --border:    rgba(15,23,42,0.08);
  --border-h:  rgba(15,23,42,0.16);

  /* Dark text on light bg */
  --text:      #020617;  /* almost black */
  --muted:     #6b7280;  /* slate-500 */
  --faint:     #e5e7eb;  /* light divider */

  --tr: 180ms cubic-bezier(.16,1,.3,1);
  --tr-slow: 320ms cubic-bezier(.16,1,.3,1);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-geist-sans);
  font-size: 1rem;
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100dvh;
}

::selection { background: rgba(15,23,42,0.12); color: #000; }

:focus-visible {
  outline: 1.5px solid rgba(15,23,42,0.4);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration:.01ms!important; transition-duration:.01ms!important; }
}

/* ── GLASS CARD (light, for all elements using .glass) ── */
.glass {
  background: rgba(255,255,255,0.78);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid var(--border);
  box-shadow:
    0 0 0 1px rgba(15,23,42,0.02),
    0 10px 30px rgba(15,23,42,0.08),
    inset 0 1px 0 rgba(255,255,255,0.9);
  border-radius: 16px;
}

.glass:hover {
  border-color: var(--border-h);
  box-shadow:
    0 0 0 1px rgba(15,23,42,0.03),
    0 14px 40px rgba(15,23,42,0.13),
    inset 0 1px 0 rgba(255,255,255,1);
}

/* ── NOISE TEXTURE (hero) ── */
.noise {
  position: relative;
  isolation: isolate;
}
.noise::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
  pointer-events: none;
  z-index: 0;
  opacity: .45;
}

/* ── DOT GRID BG ── */
.dot-grid {
  background-image: radial-gradient(circle, rgba(15,23,42,0.06) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* ── SECTION LABELS ── */
.label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(15,23,42,0.55);
  margin-bottom: 16px;
}
.label::before {
  content: '';
  display: block;
  width: 18px;
  height: 1px;
  background: rgba(15,23,42,0.35);
}

/* ── SKELETON ── */
@keyframes shimmer { 0%{background-position:-200% 0} 100%{background-position:200% 0} }
.skel {
  background: linear-gradient(90deg,var(--s2) 25%,var(--s3) 50%,var(--s2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
  border-radius: 6px;
}

/* ── SCROLL REVEALS ── */
.reveal { opacity: 1; }
@supports (animation-timeline: scroll()) {
  .reveal {
    opacity: 0;
    animation: fade-in linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 75%;
  }
  @keyframes fade-in { to { opacity: 1; } }
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600;
  padding: 10px 20px; border-radius: 10px;
  cursor: pointer; transition: all var(--tr);
  border: 1px solid transparent;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: #020617;
  color: #f9fafb;
  border-color: rgba(15,23,42,0.3);
  box-shadow: 0 4px 20px rgba(15,23,42,0.15);
}
.btn-primary:hover {
  background: #000;
  box-shadow: 0 6px 26px rgba(15,23,42,0.22);
}

.btn-ghost {
  background: rgba(255,255,255,0.75);
  color: var(--muted);
  border-color: var(--border);
}
.btn-ghost:hover {
  background: #ffffff;
  color: var(--text);
  border-color: var(--border-h);
}

/* ── CALENDAR CELLS ── */
.cal-cell {
  rx: 3px;
  transition: opacity 0.12s;
}
.cal-cell:hover { opacity: .75; cursor: default; }

/* ── COMMIT TIMELINE ── */
.commit-line {
  position: relative;
}
.commit-line::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 20px;
  bottom: -8px;
  width: 1px;
  background: var(--faint);
}
.commit-line:last-child::before { display: none; }