:root {
  --bg: #0b1220;
  --panel: #0f1a2e;
  --panel-2: #13223d;
  --text: #e6eefc;
  --muted: #9db0cf;
  --primary: #3b82f6;
  --danger: #ef4444;
  --border: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
  background: radial-gradient(1200px 600px at 30% 0%, #14254a, var(--bg));
  color: var(--text);
}

a { color: inherit; text-decoration: none; }

.app {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: rgba(15, 26, 46, 0.75);
  border-right: 1px solid var(--border);
  padding: 16px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-item {
  padding: 10px 12px;
  border-radius: 10px;
  background: transparent;
  border: 1px solid transparent;
}

.nav-item.active, .nav-item:hover {
  background: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.25);
}

.main {
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 26, 46, 0.6);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
}

.brand { font-weight: 700; letter-spacing: 0.2px; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.user { color: var(--muted); }

.content {
  padding: 18px;
}

.footer {
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 12px;
}

.card {
  grid-column: span 4;
  background: rgba(19, 34, 61, 0.65);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
}

.card .value {
  font-size: 20px;
  font-weight: 800;
}

.panel {
  background: rgba(19, 34, 61, 0.55);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-header h2 {
  margin: 0;
  font-size: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 600;
}

.btn-primary {
  background: var(--primary);
  border-color: rgba(59, 130, 246, 0.4);
  color: #061029;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border);
  color: var(--text);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.18);
  border-color: rgba(239, 68, 68, 0.35);
  color: #ffd7d7;
}

.table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 12px;
}

.table th, .table td {
  text-align: left;
  padding: 10px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.table th {
  font-size: 12px;
  color: var(--muted);
  font-weight: 700;
}

.muted { color: var(--muted); }

.alert {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  margin: 12px 0;
}

.alert-error {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.25);
}

.alert-ok {
  background: rgba(34, 197, 94, 0.12);
  border-color: rgba(34, 197, 94, 0.25);
}

label {
  display: grid;
  gap: 6px;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 13px;
}

input, select, textarea {
  padding: 10px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(15, 26, 46, 0.55);
  color: var(--text);
  outline: none;
}

textarea { min-height: 90px; resize: vertical; }

.row {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 12px;
}

.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
.col-3 { grid-column: span 3; }
.col-12 { grid-column: span 12; }

.auth-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 18px;
}

.auth-card {
  width: min(440px, 100%);
  background: rgba(19, 34, 61, 0.65);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
}

.auth-card h1 {
  margin: 0 0 6px;
  font-size: 18px;
}

.actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

@media (max-width: 980px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
  .card { grid-column: span 6; }
}

@media (max-width: 560px) {
  .card { grid-column: span 12; }
  .row { grid-template-columns: 1fr; }
  .col-6, .col-4, .col-3, .col-12 { grid-column: span 12; }
}