:root {
  color-scheme: dark;
  --bg: #0d0f16;
  --bg-radial: #1a2030;
  --panel: #161a24;
  --panel-soft: rgba(255, 255, 255, 0.02);
  --border: #2a3040;
  --text: #eceff7;
  --muted: #9aa3b9;
  --accent: #22d3ee;
  --accent-soft: rgba(34, 211, 238, 0.12);
  --danger: #f87171;
  --input-bg: #0f121a;
  --header-bg: rgba(13, 15, 22, 0.92);
  --surface: #10141d;
  --surface-2: #0a0c12;
  --btn-secondary-bg: #2a3040;
  --btn-primary-text: #041018;
  --wash: rgba(255, 255, 255, 0.04);
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
  --ok: #34d399;
  --warn: #fbbf24;
}

html.light-mode {
  color-scheme: light;
  --bg: #e8eef5;
  --bg-radial: #f8fafc;
  --panel: #ffffff;
  --panel-soft: rgba(15, 23, 42, 0.03);
  --border: #cbd5e1;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #0e7490;
  --accent-soft: rgba(14, 116, 144, 0.12);
  --danger: #dc2626;
  --input-bg: #f8fafc;
  --header-bg: rgba(255, 255, 255, 0.92);
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --btn-secondary-bg: #e2e8f0;
  --btn-primary-text: #041018;
  --wash: rgba(15, 23, 42, 0.05);
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  --ok: #059669;
  --warn: #d97706;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  background: radial-gradient(circle at 20% 20%, var(--bg-radial), var(--bg) 55%);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 1rem;
}

.auth-shell {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.auth-shell-wide { width: min(520px, 100%); }

h1 { margin: 0 0 0.35rem; font-size: 1.6rem; }
.auth-sub { margin: 0 0 1.2rem; color: var(--muted); }

.auth-form { display: grid; gap: 0.9rem; }
.auth-form fieldset {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem;
  margin: 0;
}
.auth-form legend { padding: 0 0.4rem; color: var(--muted); font-size: 0.85rem; }
.auth-form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.auth-form input {
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
}

.auth-btn {
  padding: 0.7rem 1rem;
  border: none;
  border-radius: 8px;
  background: linear-gradient(90deg, #22d3ee, #6366f1);
  color: var(--btn-primary-text);
  font-weight: 700;
  cursor: pointer;
  position: relative;
  transition: opacity 0.15s ease, filter 0.15s ease;
}
.auth-btn.secondary {
  background: var(--btn-secondary-bg);
  color: var(--text);
  font-weight: 600;
}
.auth-btn:disabled,
.auth-btn.is-loading {
  cursor: wait;
  opacity: 0.78;
  filter: saturate(0.85);
}
.auth-btn.is-loading {
  padding-left: 2.25rem;
}
.auth-btn.is-loading::before {
  content: '';
  position: absolute;
  left: 0.85rem;
  top: 50%;
  width: 0.9rem;
  height: 0.9rem;
  margin-top: -0.45rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: auth-btn-spin 0.65s linear infinite;
}
@keyframes auth-btn-spin {
  to { transform: rotate(360deg); }
}

.auth-error { color: var(--danger); margin: 0; font-size: 0.9rem; }
.auth-hint { color: var(--muted); font-size: 0.85rem; margin: 0.35rem 0 0; }
.auth-warn {
  color: var(--warn);
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.25);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  margin: 0 0 1rem;
  line-height: 1.45;
}
.auth-footer { margin-top: 1rem; text-align: center; }
.auth-footer a { color: var(--accent); }

.admin-shell {
  width: min(960px, 100%);
  margin: 1.5rem auto;
  padding: 0 1rem 2rem;
}
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}
.admin-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 1rem;
}
.admin-card h2 { margin: 0 0 0.75rem; font-size: 1.1rem; }
.admin-row { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: end; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.admin-table th, .admin-table td {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.admin-table code { font-size: 0.8rem; word-break: break-all; }