:root {
  --bg: #f4f6f9; --ink: #1c2430; --muted: #5c6b7a; --card: #fff; --line: #e5e7eb;
  --side: #1f2937; --accent: #be123c; color-scheme: light;
}
html.dark {
  --bg: #0f172a; --ink: #e8eef8; --muted: #94a3b8; --card: #1e293b; --line: #334155;
  --side: #0b1220; --accent: #fb7185; color-scheme: dark;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", system-ui, sans-serif; background: var(--bg); color: var(--ink); }
.side { position: fixed; inset: 0 auto 0 0; width: 230px; background: var(--side); color: #fff; padding: 18px; }
.side a { display: block; color: #fff; text-decoration: none; padding: 10px 8px; border-radius: 8px; }
.side a:hover { background: rgba(255,255,255,.08); }
.brand { font-weight: 750; margin-bottom: 12px; }
main { margin-left: 230px; padding: 24px; }
.bar { display: flex; justify-content: flex-end; }
.card, .table { background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
.card { padding: 16px; margin: 12px 0; }
.stats { display: flex; gap: 12px; flex-wrap: wrap; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
.thumb { width: 64px; height: 64px; object-fit: cover; border-radius: 8px; background: #eee; }
input, textarea, select { width: 100%; padding: 10px; margin: 6px 0; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); }
button, .btn { border: 0; border-radius: 8px; padding: 8px 12px; background: #2563eb; color: #fff; font-weight: 700; cursor: pointer; text-decoration: none; display: inline-block; }
.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.danger { background: #dc2626; }
.muted { color: var(--muted); }
.login-wrap { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg, #1e293b, #312e81); }
.login-card { width: min(420px, 100%); background: #fff; color: #111; }
@media (max-width: 800px) { .side { position: static; width: auto; } main { margin-left: 0; } }