@import url("./tokens.css");

* { box-sizing: border-box; }
html, body { background: var(--color-snow); margin: 0; padding: 0; }
body {
  font-family: var(--font-family);
  font-size: 16px; line-height: 1.5; color: var(--color-gray-500);
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}

/* ─── Entrance ─── */
@keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }
.fade-up { opacity: 0; transform: translateY(16px); animation: fadeUp 0.35s var(--ease-expo-out) forwards; }
.stagger > * { opacity: 0; transform: translateY(16px); animation: fadeUp 0.35s var(--ease-expo-out) forwards; }
.stagger > *:nth-child(1) { animation-delay: 0ms; }
.stagger > *:nth-child(2) { animation-delay: 70ms; }
.stagger > *:nth-child(3) { animation-delay: 140ms; }
.stagger > *:nth-child(4) { animation-delay: 210ms; }
.stagger > *:nth-child(5) { animation-delay: 280ms; }
.stagger > *:nth-child(6) { animation-delay: 350ms; }
.stagger > *:nth-child(n+7) { animation-delay: 400ms; }

/* ─── Top bar ─── */
.top-bar {
  background: var(--color-white);
  border-bottom: 2px solid var(--color-gray-100);
  padding: var(--space-md) var(--space-2xl);
  display: flex; gap: var(--space-md); align-items: center;
  position: sticky; top: 0; z-index: 10;
}
.top-bar .brand .name {
  font-size: 22px; font-weight: 800; color: var(--color-gray-600);
  letter-spacing: -0.03em; line-height: 1;
}
.top-bar .brand .accent { color: var(--color-primary); }
.top-bar .brand .sub {
  font-size: 13px; color: var(--color-gray-400); font-weight: 500; margin-top: 2px;
}
.top-bar .right { margin-left: auto; display: flex; gap: var(--space-sm); align-items: center; }

/* ─── Buttons (Duolingo / BRACE) ─── */
.btn {
  font-family: inherit;
  font-size: 14px; font-weight: 800;
  text-transform: uppercase; letter-spacing: 0.05em;
  padding: 12px 20px; min-height: 44px;
  border: none; border-radius: var(--radius-md);
  cursor: pointer; user-select: none;
  display: inline-flex; align-items: center; justify-content: center;
  text-decoration: none;
  transition: filter 0.1s ease, transform 0.1s ease, box-shadow 0.1s ease;
}
.btn:hover { filter: brightness(1.06); }
.btn:active { transform: translateY(4px); box-shadow: none !important; }
.btn:disabled { background: var(--color-gray-100) !important; color: var(--color-gray-300) !important; box-shadow: 0 4px 0 var(--color-gray-200) !important; cursor: not-allowed; }
.btn-primary  { background: var(--color-primary); color: var(--color-white); box-shadow: 0 4px 0 var(--color-primary-dark); }
.btn-secondary{ background: var(--color-white); color: var(--color-gray-500); border: 2px solid var(--color-gray-100); box-shadow: 0 4px 0 var(--color-gray-100); }
.btn-secondary:hover { background: var(--color-snow); border-color: var(--color-gray-200); filter: none; }
.btn-blue     { background: var(--color-blue);  color: var(--color-white); box-shadow: 0 4px 0 var(--color-blue-dark); }
.btn-red      { background: var(--color-red);   color: var(--color-white); box-shadow: 0 4px 0 var(--color-red-dark); }
.btn-purple   { background: var(--color-purple); color: var(--color-white); box-shadow: 0 4px 0 var(--color-purple-dark); }
.btn-orange   { background: var(--color-orange); color: var(--color-white); box-shadow: 0 4px 0 var(--color-orange-dark); }
.btn.btn-sm   { padding: 8px 14px; font-size: 12px; min-height: 36px; }

/* ─── Status pill ─── */
.status-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: var(--radius-full);
  font-size: 12px; font-weight: 600; color: var(--color-gray-500);
  background: var(--color-primary-surface); border: 1px solid rgba(0,0,0,0.05);
}

/* ─── Hero ─── */
.hero {
  text-align: center; padding: var(--space-2xl) var(--space-md) var(--space-lg);
  max-width: 940px; margin: 0 auto;
}
.hero h1 {
  font-size: 38px; line-height: 1.15; font-weight: 800;
  color: var(--color-gray-600); letter-spacing: -0.025em; margin: 0;
}
.hero h1 .accent { color: var(--color-primary); }
.hero p {
  font-size: 18px; line-height: 1.55; color: var(--color-gray-400);
  margin: var(--space-md) auto 0; max-width: 680px;
}

/* ─── PathCard (BRACE-style image card) ─── */
.path-card {
  position: relative; overflow: hidden;
  border-radius: var(--radius-xl);
  border: 2px solid var(--color-gray-100);
  background: var(--color-white);
  box-shadow: 0 6px 0 var(--color-gray-100);
  cursor: pointer; user-select: none;
  transition: box-shadow 0.2s var(--ease-expo-out), border-color 0.2s var(--ease-expo-out), transform 0.2s var(--ease-expo-out);
  text-decoration: none; color: inherit;
  display: block;
  min-height: 220px;
}
.path-card:hover {
  border-color: var(--color-blue);
  box-shadow: 0 8px 0 var(--color-blue-dark);
  transform: translateY(-2px);
}
.path-card:active {
  box-shadow: none; transform: translateY(6px);
}
.path-card[disabled], .path-card.coming-soon {
  pointer-events: none; opacity: 0.55;
}
.path-card .img-wrap {
  position: absolute; inset: 0; overflow: hidden;
}
.path-card img {
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(0.4) brightness(0.75);
  transition: filter 0.4s var(--ease-expo-out), transform 0.4s var(--ease-expo-out);
}
.path-card:hover img { filter: grayscale(0) brightness(1); transform: scale(1.04); }
.path-card .img-wrap::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.35) 50%, transparent 100%);
}
.path-card .body {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: var(--space-lg);
  min-height: 220px;
}
.path-card h3 {
  margin: 0; font-size: 22px; font-weight: 800; color: #fff;
  letter-spacing: -0.02em; line-height: 1.2;
}
.path-card .subtitle {
  margin-top: 4px;
  font-size: 14px; color: rgba(255,255,255,0.85);
}
.path-card .meta {
  margin-top: var(--space-sm); display: flex; gap: 6px; flex-wrap: wrap;
}
.path-card .chip {
  background: rgba(255,255,255,0.16); color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 2px 10px; border-radius: var(--radius-full);
  font-size: 11px; font-weight: 600; letter-spacing: 0.02em;
}
.path-card .chip.priority-CRITICAL { background: var(--color-red); border-color: var(--color-red); }
.path-card .chip.priority-HIGH { background: var(--color-orange); border-color: var(--color-orange); }
.path-card .chip.priority-MEDIUM { background: var(--color-blue); border-color: var(--color-blue); }
.path-card .chip.priority-LOW { background: var(--color-primary); border-color: var(--color-primary); }

/* ─── Card (plain content surface) ─── */
.card {
  background: var(--color-white); border: 2px solid var(--color-gray-100);
  border-radius: var(--radius-lg); padding: var(--space-lg);
  box-shadow: 0 4px 0 var(--color-gray-100);
}
.card h3 {
  margin: 0 0 var(--space-sm); font-size: 18px; font-weight: 700;
  color: var(--color-gray-600); letter-spacing: -0.02em;
}

/* ─── Scene-grid layout ─── */
.scene-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md); padding: 0 var(--space-2xl);
  max-width: 1280px; margin: 0 auto var(--space-2xl);
}

/* ─── Demos hub layout ─── */
.demo-hub {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
  padding: 0 var(--space-2xl) var(--space-2xl);
  max-width: 1100px; margin: 0 auto;
}

/* ─── Footer ─── */
.foot {
  text-align: center; padding: var(--space-lg) var(--space-md) var(--space-2xl);
  font-size: 12px; color: var(--color-gray-300);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0ms !important;
    transition-duration: 0.01ms !important;
  }
}