:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --ink: #1a2332;
  --muted: #5c6b7a;
  --line: #d8dee6;
  --brand: #0b3d5c;
  --brand-2: #1a6b9a;
  --accent: #c45c26;
  --success: #1f7a4c;
  --warning: #b86e00;
  --danger: #b42318;
  --info: #1a6b9a;
  --shadow: 0 1px 2px rgba(26, 35, 50, 0.06), 0 8px 24px rgba(26, 35, 50, 0.06);
  --radius: 10px;
  --font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(26, 107, 154, 0.12), transparent 60%),
    radial-gradient(900px 400px at 100% 0%, rgba(196, 92, 38, 0.08), transparent 55%),
    var(--bg);
  min-height: 100vh;
}

a { color: var(--brand-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 250px;
  background: linear-gradient(180deg, #0b3d5c 0%, #0a2f46 100%);
  color: #e8eef3;
  padding: 1.25rem 1rem;
  flex-shrink: 0;
}
.sidebar .brand {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 0.25rem;
}
.sidebar .brand-sub {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-bottom: 1.5rem;
}
.sidebar nav a {
  display: block;
  color: #d7e4ee;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  margin-bottom: 0.2rem;
  text-decoration: none;
  font-size: 0.92rem;
}
.sidebar nav a:hover,
.sidebar nav a.active {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  text-decoration: none;
}
.sidebar .nav-section {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.55;
  margin: 1rem 0.75rem 0.4rem;
}

.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 1.5rem;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar .user-meta { text-align: right; font-size: 0.9rem; }
.topbar .user-meta .muted { color: var(--muted); font-size: 0.8rem; }
.badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  padding: 0.1rem 0.45rem;
  font-size: 0.7rem;
  margin-left: 0.35rem;
}

.content { padding: 1.5rem; max-width: 1200px; width: 100%; margin: 0 auto; }

.page-title {
  margin: 0 0 0.35rem;
  font-size: 1.6rem;
  font-weight: 700;
}
.page-sub { margin: 0 0 1.25rem; color: var(--muted); }

.flash-wrap { margin-bottom: 1rem; }
.flash {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 0.5rem;
  border: 1px solid transparent;
}
.flash-success { background: #e8f6ee; color: var(--success); border-color: #b7e0c7; }
.flash-danger { background: #fdeceb; color: var(--danger); border-color: #f3c1bd; }
.flash-warning { background: #fff6e5; color: var(--warning); border-color: #f0d4a0; }
.flash-info { background: #e8f3fa; color: var(--info); border-color: #b7d7ea; }

.grid {
  display: grid;
  gap: 1rem;
}
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}
.stat .label { color: var(--muted); font-size: 0.8rem; }
.stat .value { font-size: 1.8rem; font-weight: 700; margin-top: 0.2rem; color: var(--brand); }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}
.panel h2, .panel h3 {
  margin: 0 0 0.85rem;
  font-size: 1.05rem;
}

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
table.data th, table.data td {
  text-align: left;
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.data th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
table.data tr:hover td { background: #f8fafc; }

.btn {
  display: inline-block;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  font-size: 0.9rem;
  cursor: pointer;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
}
.btn:hover { filter: brightness(1.08); text-decoration: none; color: #fff; }
.btn-secondary { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-secondary:hover { color: var(--ink); background: #f7f9fb; }
.btn-accent { background: var(--accent); }
.btn-danger { background: var(--danger); }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }
.btn-row { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }

label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 0.3rem; }
.form-group { margin-bottom: 0.9rem; }
input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="date"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  background: #fff;
}
textarea { min-height: 90px; resize: vertical; }
.hint { color: var(--muted); font-size: 0.8rem; margin-top: 0.25rem; }

.pill {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: #e8eef3;
  color: var(--brand);
}
.pill-success { background: #e8f6ee; color: var(--success); }
.pill-warning { background: #fff6e5; color: var(--warning); }
.pill-danger { background: #fdeceb; color: var(--danger); }
.pill-info { background: #e8f3fa; color: var(--info); }

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}
.login-card {
  width: min(440px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.75rem;
  box-shadow: var(--shadow);
}
.login-card h1 {
  margin: 0 0 0.25rem;
  color: var(--brand);
  font-size: 1.5rem;
}
.login-card .tagline {
  color: var(--muted);
  margin: 0 0 1.25rem;
  font-size: 0.95rem;
}

.heatmap td.heat {
  text-align: center;
  font-weight: 600;
}
.heat-0 { background: #f8fafc; color: #99a; }
.heat-1 { background: #e8f3fa; }
.heat-2 { background: #cfe4f2; }
.heat-3 { background: #9fc9e3; }
.heat-4 { background: #5ea3cc; color: #fff; }
.heat-5 { background: #0b3d5c; color: #fff; }

.risk-critical { color: var(--danger); font-weight: 700; }
.risk-emerging { color: var(--warning); font-weight: 700; }
.risk-healthy { color: var(--success); font-weight: 700; }

.empty {
  color: var(--muted);
  padding: 1rem 0;
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .content { padding: 1rem; }
}