:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --success: #059669;
  --warning: #d97706;
  --sidebar: #0f172a;
  --sidebar-text: #e2e8f0;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}

[data-theme="dark"] {
  --bg: #0b1120;
  --surface: #151e32;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --border: #2d3a52;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --success: #34d399;
  --warning: #fbbf24;
  --sidebar: #020617;
  --sidebar-text: #cbd5e1;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

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

.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: sticky; top: 0; z-index: 20; }
}

.sidebar {
  background: var(--sidebar);
  color: var(--sidebar-text);
  padding: 1.25rem 0;
  border-right: 1px solid var(--border);
}

.sidebar__brand {
  padding: 0 1.25rem 1.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 1rem;
}

.sidebar__nav a {
  display: block;
  padding: 0.65rem 1.25rem;
  color: var(--sidebar-text);
  opacity: 0.85;
  font-size: 0.95rem;
  border-left: 3px solid transparent;
}

.sidebar__nav a:hover, .sidebar__nav a.is-active {
  opacity: 1;
  background: rgba(255,255,255,0.06);
  border-left-color: var(--accent);
}

.main {
  padding: 1.5rem 2rem 3rem;
  max-width: 1400px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}

.topbar h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: none;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, transform 0.1s;
}

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

.btn--primary {
  background: var(--accent);
  color: #fff;
}
.btn--primary:hover { background: var(--accent-hover); color: #fff; }

.btn--ghost {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn--danger {
  background: #dc2626;
  color: #fff;
}

.theme-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

.card__title {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 600;
}

.grid-kpi {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow);
}

.kpi__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.kpi__value {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  padding: 0.65rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  background: var(--bg);
}

tr:last-child td { border-bottom: none; }

.form-row {
  margin-bottom: 1rem;
}

.form-row label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
  width: 100%;
  max-width: 420px;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}

textarea { max-width: 100%; min-height: 80px; }

.badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge--ok { background: rgba(5, 150, 105, 0.15); color: var(--success); }
.badge--warn { background: rgba(217, 119, 6, 0.15); color: var(--warning); }
.badge--muted { background: var(--bg); color: var(--muted); }

.flash {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.flash--ok { background: rgba(5, 150, 105, 0.12); color: var(--success); }
.flash--err { background: rgba(220, 38, 38, 0.12); color: #dc2626; }

.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.muted { color: var(--muted); font-size: 0.9rem; }
.mono { font-family: ui-monospace, monospace; font-size: 0.82rem; word-break: break-all; }

.stack { display: flex; flex-direction: column; gap: 0.5rem; }