:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --border: #e2e5ea;
  --text: #1a1d23;
  --text-muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --hot: #dc2626;
  --radius: 8px;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 56px;
}

.topbar .brand { font-weight: 700; font-size: 16px; color: var(--text); }
.topbar .brand span { color: var(--primary); }

.topbar nav { display: flex; gap: 4px; }
.topbar nav a {
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-weight: 500;
}
.topbar nav a:hover, .topbar nav a.active {
  background: #eef2ff;
  color: var(--primary);
  text-decoration: none;
}

.topbar .user { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-muted); }

main.container { max-width: 1200px; margin: 0 auto; padding: 24px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card + .card { margin-top: 16px; }

h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 0 0 12px; }

.btn {
  display: inline-block;
  background: var(--primary);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  font-size: 14px;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn.secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn.danger { background: var(--danger); }

input, textarea, select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
}

label { display: block; font-weight: 600; margin-bottom: 4px; font-size: 13px; }
.field { margin-bottom: 14px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 13px; }
th { color: var(--text-muted); font-weight: 600; text-transform: uppercase; font-size: 11px; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  background: #eef2ff;
  color: var(--primary);
}
.badge.hot { background: #fef2f2; color: var(--hot); }
.badge.warm { background: #fffbeb; color: var(--warning); }
.badge.cold { background: #f1f5f9; color: var(--text-muted); }
.badge.success { background: #f0fdf4; color: var(--success); }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card { width: 340px; }
.login-card h1 { text-align: center; }
.login-card .subtitle { text-align: center; color: var(--text-muted); margin-bottom: 20px; font-size: 13px; }

.error-banner {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--danger);
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 13px;
}

.empty-state { text-align: center; color: var(--text-muted); padding: 40px 20px; }