:root {
  color-scheme: dark;
  --bg: #070b11;
  --panel: #0d131d;
  --panel-2: #111a27;
  --line: rgba(255,255,255,.1);
  --text: #f8fafc;
  --muted: #94a3b8;
  --gold: #f6c65b;
  --blue: #4da3ff;
  --green: #34d399;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px 1fr;
}

.sidebar {
  border-right: 1px solid var(--line);
  background: #05080d;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark,
.login-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: #0b0f16;
  background: linear-gradient(135deg, var(--gold), var(--blue));
  font-weight: 900;
}

.brand span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.nav {
  display: grid;
  gap: 8px;
}

.nav a {
  color: var(--muted);
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid transparent;
}

.nav a.active,
.nav a:hover {
  color: var(--text);
  background: rgba(255,255,255,.06);
  border-color: var(--line);
}

.sidebar-foot {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 13px;
}

.main {
  padding: 32px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.topbar h1 {
  margin: 0 0 6px;
  font-size: 28px;
}

.topbar p,
.panel p,
.login-card p {
  margin: 0;
  color: var(--muted);
}

.admin-chip {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--gold);
  background: rgba(246,198,91,.08);
}

.grid {
  display: grid;
  gap: 16px;
}

.cards {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card,
.panel,
.login-card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border-radius: 16px;
}

.card {
  padding: 22px;
}

.card span,
.eyebrow {
  color: var(--blue);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .12em;
}

.card strong {
  display: block;
  margin-top: 12px;
  font-size: 30px;
}

.card p {
  margin: 6px 0 0;
  color: var(--muted);
}

.panel {
  padding: 28px;
}

.panel h2 {
  margin: 10px 0;
}

.login-page {
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(420px, 100%);
  padding: 32px;
}

.login-card h1 {
  margin: 18px 0 8px;
}

.login-form {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.login-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.login-form input {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.05);
  color: var(--text);
  border-radius: 10px;
  padding: 12px;
}

.login-form button {
  border: 0;
  border-radius: 10px;
  padding: 13px 16px;
  background: var(--gold);
  color: #0b0f16;
  font-weight: 800;
  cursor: pointer;
}

.alert {
  margin-top: 18px;
  padding: 12px;
  border: 1px solid rgba(248,113,113,.35);
  background: rgba(248,113,113,.1);
  color: #fecaca;
  border-radius: 10px;
}

@media (max-width: 980px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .cards {
    grid-template-columns: 1fr;
  }

  .main {
    padding: 20px;
  }
}