:root {
  --primary: #2563eb;
  --navy: #0f172a;
  --teal: #14b8a6;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  flex: 1;
}

.sidebar {
  background: linear-gradient(180deg, var(--navy), #111827);
  color: #fff;
  padding: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.brand-logo {
  width: 52px;
  height: 52px;
  object-fit: contain;
  background: rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 6px;
}

.brand h1,
.brand p,
.topbar h2,
.topbar p,
.panel h3 {
  margin: 0;
}

.brand p,
.topbar p {
  color: rgba(255,255,255,0.75);
}

.nav {
  display: grid;
  gap: 10px;
}

.nav-item {
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  color: #fff;
  padding: 12px 14px;
  border-radius: 12px;
  text-align: left;
  cursor: pointer;
}

.nav-item.active,
.nav-item:hover {
  background: var(--primary);
  border-color: var(--primary);
}

.content {
  padding: 28px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.topbar p {
  color: var(--muted);
  margin-top: 6px;
}

.firebase-state {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--muted);
  text-align: right;
}

.user-chip {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 14px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.card,
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.05);
}

.card {
  padding: 18px;
}

.card .label {
  color: var(--muted);
  font-size: 14px;
}

.card .value {
  font-size: 28px;
  font-weight: 700;
  margin-top: 8px;
  color: var(--navy);
}

.card .meta {
  color: var(--teal);
  margin-top: 6px;
  font-size: 13px;
}

.panel {
  padding: 20px;
}

.module-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.module-item {
  padding: 14px;
  border-radius: 14px;
  background: #f8fafc;
  border: 1px solid var(--border);
}

.module-item strong {
  display: block;
  margin-bottom: 6px;
}



.site-credit {
  flex-shrink: 0;
  text-align: center;
  padding: 14px 16px;
  margin-top: 24px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
.site-credit a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}
.site-credit a:hover {
  text-decoration: underline;
}