/* ================================================================
   BASE - Shared design tokens and layout for all pages
   ================================================================ */

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

:root {
  --bg: #0a0a0a;
  --surface: #141414;
  --surface-hover: #1c1c1c;
  --border: #232323;
  --border-hover: #333;
  --text: #ededed;
  --text-muted: #888;
  --text-dim: #555;
  --accent: #22c55e;
  --accent-dim: rgba(34, 197, 94, 0.12);
  --accent-border: rgba(34, 197, 94, 0.25);
  --danger: #ef4444;
  --danger-dim: rgba(239, 68, 68, 0.1);
  --danger-border: rgba(239, 68, 68, 0.2);
  --warning: #f59e0b;
  --warning-dim: rgba(245, 158, 11, 0.1);
  --warning-border: rgba(245, 158, 11, 0.2);
  --radius: 14px;
  --radius-sm: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  -webkit-font-smoothing: antialiased;
}

/* ---- Page container ---- */
.page {
  width: 100%;
  max-width: 480px;
}

/* ---- Header ---- */
.header {
  text-align: center;
  margin-bottom: 2rem;
}

.icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.25rem;
  border-radius: 18px;
  display: grid;
  place-items: center;
}

.icon svg {
  width: 32px;
  height: 32px;
}

.icon--accent {
  background: linear-gradient(145deg, var(--accent) 0%, #15803d 100%);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.06),
    0 12px 40px var(--accent-dim);
  color: #fff;
}

.icon--accent svg {
  color: #fff;
}

.icon--warning {
  background: var(--warning-dim);
  border: 1px solid var(--warning-border);
}

.icon--warning svg {
  color: var(--warning);
}

.icon--danger {
  background: var(--danger-dim);
  border: 1px solid var(--danger-border);
}

.icon--danger svg {
  color: var(--danger);
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 0.35rem;
}

.header p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ---- Card ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1rem;
}

.card-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 1.15rem;
}

.card-row + .card-row {
  border-top: 1px solid var(--border);
}

.card-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.card-value {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* ---- Badge ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 11px;
  border-radius: 9999px;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.badge--green {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

.badge-dot {
  width: 7px;
  height: 7px;
  background: currentColor;
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.35;
    transform: scale(0.85);
  }
}

/* ---- Links grid ---- */
.links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  padding: 1rem 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 500;
  transition:
    background 0.15s,
    border-color 0.15s;
}

.link:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
}

.link:active {
  transform: scale(0.98);
}

.link svg {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: color 0.15s;
}

.link:hover svg {
  color: var(--text);
}

/* ---- Button ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.65rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition:
    background 0.15s,
    border-color 0.15s;
  cursor: pointer;
}

.btn:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
}

.btn:active {
  transform: scale(0.98);
}

.btn svg {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

/* ---- Error page specifics ---- */
.error-code {
  font-size: clamp(4rem, 15vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
}

.error-code--danger {
  background: linear-gradient(145deg, var(--danger) 0%, #991b1b 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.error-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.error-label--warning {
  color: var(--warning);
}
.error-label--danger {
  color: var(--danger);
}

.message {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 2rem;
}

/* ---- Footer ---- */
.footer {
  text-align: center;
  margin-top: 2rem;
  font-size: 0.6875rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
}

/* ---- Responsive ---- */
@media (max-width: 380px) {
  .links {
    grid-template-columns: 1fr;
  }
  .link {
    flex-direction: row;
    justify-content: center;
    padding: 0.75rem 1rem;
  }
}

@media (min-width: 768px) {
  .header h1 {
    font-size: 1.75rem;
  }
  .page {
    max-width: 520px;
  }
  .icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
  }
  .icon svg {
    width: 36px;
    height: 36px;
  }
}