:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --danger: #ef4444;
  --warn: #f59e0b;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 240px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1.25rem;
}
.sidebar h2 { font-size: 1rem; margin: 0 0 1rem; color: var(--muted); }
.sidebar nav a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  color: var(--text);
  margin-bottom: 0.25rem;
}
.sidebar nav a:hover, .sidebar nav a.active {
  background: rgba(59, 130, 246, 0.15);
  text-decoration: none;
}
.main { flex: 1; padding: 1.5rem 2rem; }
.main h1 { margin-top: 0; font-size: 1.5rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { padding: 0.6rem 0.75rem; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }

.form-grid { display: grid; gap: 1rem; }
.form-row label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 0.35rem; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}
.form-row textarea { min-height: 80px; }

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-danger { background: var(--danger); color: #fff; }

.alert { padding: 0.75rem 1rem; border-radius: 6px; margin-bottom: 1rem; }
.alert-error { background: rgba(239,68,68,0.15); border: 1px solid var(--danger); }
.alert-success { background: rgba(34,197,94,0.15); border: 1px solid var(--success); }

.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.auth-page .card { width: 100%; max-width: 400px; }

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  background: var(--border);
}
.badge-active { background: rgba(34,197,94,0.25); color: var(--success); }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.stat-card { text-align: center; }
.stat-card .num { font-size: 1.75rem; font-weight: 700; color: var(--accent); }

.spreadsheet .cell-input {
  width: 100%;
  min-width: 72px;
  padding: 0.35rem 0.45rem;
  border: 1px solid transparent;
  border-radius: 4px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
}
.spreadsheet .cell-input:focus {
  border-color: var(--accent);
  outline: none;
}
.spreadsheet .cell-num { max-width: 100px; text-align: right; }
.spreadsheet tbody tr:hover { background: rgba(59, 130, 246, 0.06); }
.spreadsheet-wrap { max-height: 70vh; }

.perm-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1rem;
  align-items: center;
  max-width: 520px;
}
.perm-grid label { display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem; white-space: nowrap; }

.variant-block {
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.api-key-box {
  font-family: monospace;
  font-size: 0.8rem;
  word-break: break-all;
  background: var(--bg);
  padding: 0.75rem;
  border-radius: 6px;
}