/* ---------- 3D depth layer (loads after app.css) ---------- */
:root {
  --edge-primary: #1e3a8a;
  --edge-neutral: #cbd5e1;
  --edge-danger: #7f1d1d;
  --lift: 0 1px 1px rgba(15, 23, 42, .05), 0 4px 8px rgba(15, 23, 42, .07), 0 14px 28px rgba(15, 23, 42, .09);
  --lift-high: 0 2px 2px rgba(15, 23, 42, .06), 0 16px 32px rgba(15, 23, 42, .14), 0 32px 56px rgba(15, 23, 42, .12);
}

body {
  background:
    radial-gradient(1100px 520px at 85% -8%, #dbeafe 0%, rgba(219, 234, 254, 0) 62%),
    var(--bg);
  background-attachment: fixed;
}

/* ---------- Sidebar ---------- */
.sidebar {
  background: linear-gradient(180deg, #111c33 0%, #0b1224 100%);
  box-shadow: 6px 0 24px rgba(15, 23, 42, .25);
}
.brand-mark {
  background: linear-gradient(145deg, #3b82f6, #1d4ed8);
  box-shadow: 0 3px 0 #1e3a8a, 0 6px 12px rgba(37, 99, 235, .45);
}
.nav a { transition: transform .15s ease, background .15s ease; }
.nav a:hover { transform: translateX(3px); }
.nav a.active {
  background: linear-gradient(145deg, #3b82f6, #2563eb);
  box-shadow: 0 3px 0 #1e3a8a, 0 8px 14px rgba(37, 99, 235, .35);
  transform: translateY(-1px);
}
.avatar { box-shadow: 0 2px 0 #1e293b, 0 4px 8px rgba(0, 0, 0, .3); }

/* ---------- Cards ---------- */
.card {
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border-color: rgba(226, 232, 240, .9);
  box-shadow: var(--lift);
}
.tilt {
  position: relative;
  transform-style: preserve-3d;
  transition: transform .15s ease-out, box-shadow .2s ease;
  will-change: transform;
}
.tilt:hover { box-shadow: var(--lift-high); }
.tilt::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit; pointer-events: none; opacity: 0;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(96, 165, 250, .20), rgba(96, 165, 250, 0) 55%);
  transition: opacity .2s ease;
}
.tilt:hover::after { opacity: 1; }
.tilt .stat-value { transform: translateZ(30px); }
.tilt .stat-label { transform: translateZ(14px); }
.action strong { display: block; transform: translateZ(26px); }
.action span { display: block; transform: translateZ(12px); }

/* ---------- Buttons (raised, press down when clicked) ---------- */
.btn {
  transition: transform .08s ease, box-shadow .08s ease, background .15s ease;
}
.btn-primary {
  background: linear-gradient(180deg, #3b82f6 0%, #2563eb 100%);
  box-shadow: 0 4px 0 var(--edge-primary), 0 8px 14px rgba(37, 99, 235, .30);
}
.btn-primary:hover { background: linear-gradient(180deg, #4b8ff8 0%, #2b6cf0 100%); }
.btn-secondary {
  background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
  box-shadow: 0 3px 0 var(--edge-neutral), 0 6px 10px rgba(15, 23, 42, .08);
}
.btn-danger {
  background: linear-gradient(180deg, #ef4444 0%, #dc2626 100%);
  box-shadow: 0 4px 0 var(--edge-danger), 0 8px 14px rgba(220, 38, 38, .25);
}
.btn-ghost { box-shadow: 0 3px 0 rgba(0, 0, 0, .35); }
.btn-primary:active, .btn-danger:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 var(--edge-primary), 0 2px 4px rgba(15, 23, 42, .25);
}
.btn-secondary:active, .btn-ghost:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--edge-neutral);
}

/* ---------- Inputs (sunken) and badges ---------- */
.field input, .field select, .field textarea, .score-table input {
  background: #f8fafc;
  box-shadow: inset 0 2px 4px rgba(15, 23, 42, .08);
}
.field input:focus, .field select:focus, .field textarea:focus,
.score-table input:focus {
  background: #ffffff;
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, .06), 0 0 0 3px var(--primary-soft);
}
.badge { box-shadow: inset 0 -2px 0 rgba(15, 23, 42, .08); }

/* ---------- Login page scene ---------- */
.auth-body { position: relative; overflow: hidden; }
.auth-card {
  position: relative; z-index: 1;
  box-shadow: 0 30px 60px rgba(2, 6, 23, .45), inset 0 2px 0 rgba(255, 255, 255, .6);
}
.scene { position: absolute; inset: 0; perspective: 900px; pointer-events: none; }
.float {
  position: absolute; left: var(--x); top: var(--y);
  width: var(--s); height: var(--s);
  transform-style: preserve-3d;
  animation: float var(--d) ease-in-out infinite;
}
.cube {
  width: 100%; height: 100%;
  transform-style: preserve-3d;
  animation: spin var(--t) linear infinite;
}
.cube i {
  position: absolute; inset: 0;
  border: 1px solid rgba(255, 255, 255, .35);
  background: linear-gradient(135deg, rgba(96, 165, 250, .40), rgba(37, 99, 235, .12));
}
.cube i:nth-child(1) { transform: translateZ(calc(var(--s) / 2)); }
.cube i:nth-child(2) { transform: rotateY(90deg) translateZ(calc(var(--s) / 2)); }
.cube i:nth-child(3) { transform: rotateY(180deg) translateZ(calc(var(--s) / 2)); }
.cube i:nth-child(4) { transform: rotateY(-90deg) translateZ(calc(var(--s) / 2)); }
.cube i:nth-child(5) { transform: rotateX(90deg) translateZ(calc(var(--s) / 2)); }
.cube i:nth-child(6) { transform: rotateX(-90deg) translateZ(calc(var(--s) / 2)); }
@keyframes spin {
  from { transform: rotateX(-22deg) rotateY(0deg); }
  to { transform: rotateX(-22deg) rotateY(360deg); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-26px); }
}
@media (max-width: 600px) {
  .float:nth-child(n+4) { display: none; }
}

/* ---------- Accessibility and print ---------- */
@media (prefers-reduced-motion: reduce) {
  .float, .cube { animation: none; }
  .tilt, .btn, .nav a { transition: none; }
}
@media print {
  .card, .btn, .tilt, .brand-mark, .nav a.active, .avatar {
    box-shadow: none; transform: none; animation: none;
  }
  .card { background: #fff; }
  .tilt::after { display: none; }
}