/* ===============================
   BASE.CSS — Shared foundation styles
   =============================== */

/* ===============================
   1. Root Variables (Global Tokens)
   =============================== */
:root {
  --maxw: 1200px;
  --bg: #ffffff;
  --fg: #0f172a;          /* slate-900 */
  --muted: #475569;       /* slate-600 */
  --help: #64748b;        /* slate-500 */

  --line: #dbdbdb;        /* gray-200 */
  --line-strong: #979797; /* gray-300 */

  --brand: #111111;
  --focus: #111111;
  --error: #b00020;

  --chip-bg: #f8fafc;     /* slate-50 */

  --card: #ffffff;
  --card-fg: #0f172a;

  --shadow: 0 6px 24px rgba(0, 0, 0, .06);
}

/* ===============================
   3. Reset & Typography
   =============================== */
* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  height: 100%;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video, canvas {
  max-width: 100%;
  height: auto;
}

:target {
  scroll-margin-top: 84px;
}

h1, h2, h3 {
  line-height: 1.15;
  margin: 0 0 10px;
}

p {
  margin: 0 0 12px;
}

/* ===============================
   4. Containers
   =============================== */
.container,
.home-container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 640px) {
  .home-container {
    padding: 0 18px;
  }
}

/* ===============================
   5. Utilities
   =============================== */
.muted { color: var(--muted); }
.center { text-align: center; }

.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 8px;
}

/* ===============================
   6. Buttons (Shared)
   =============================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  transition: transform .06s, box-shadow .15s, opacity .15s;
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, .18);
  text-decoration: none;
}

.btn.outline {
  background: #fff;
  color: #111;
  border-color: #111;
}

.btn .arrow {
  transition: transform .18s cubic-bezier(.2, .8, .2, 1), text-shadow .18s;
}

.btn:hover .arrow {
  transform: translateX(2px);
  text-shadow: 0 0 10px rgba(255, 255, 255, .5);
}

/* ===============================
   7. Cards
   =============================== */
.card {
  background: var(--card);
  color: var(--card-fg);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  box-shadow: var(--shadow);
  transition: transform .06s, box-shadow .15s;
}

.card:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, .08);
}

/* ===============================
   8. Grid Helpers
   =============================== */
.grid {
  display: grid;
  gap: 14px;
}

.grid.onecol {
  grid-template-columns: 1fr;
}

.features .grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* ===============================
   9. Animations
   =============================== */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .btn, .card {
    transition: none !important;
  }
}

/* ===============================
   10. Sticky Footer Skeleton
   =============================== */
body {
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

.site-footer {
  flex-shrink: 0;
}

/* ===============================
   END OF BASE.CSS
   =============================== */