:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --primary: #7c3aed;
  --primary-dark: #5b21b6;
  --success: #16a34a;
  --danger: #dc2626;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, sans-serif;
}
.admin-shell { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar {
  background: #0f172a;
  padding: 24px 16px;
  color: #cbd5e1;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand {
  display: block;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  margin-bottom: 20px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .08);
}
.sidebar nav { display: grid; gap: 6px; }
.sidebar nav a {
  color: #cbd5e1;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: .94rem;
}
.sidebar nav a:hover, .sidebar nav a.active { background: rgba(124, 58, 237, .22); color: #fff; }
.main { padding: 26px; }
.topbar h1 { margin: 0; font-size: 1.4rem; }
.topbar p { margin: 4px 0 16px; color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 16px;
}
.grid { display: grid; gap: 14px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.full { grid-column: 1 / -1; }
.kpi { padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.kpi h3 { margin: 0; font-size: .85rem; color: var(--muted); font-weight: 600; }
.kpi .value { margin-top: 10px; font-size: 1.7rem; font-weight: 800; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; border-bottom: 1px solid var(--line); padding: 10px; vertical-align: top; }
th { color: var(--muted); font-size: .84rem; text-transform: uppercase; letter-spacing: .04em; }
label { display: block; color: var(--muted); font-size: .86rem; margin-bottom: 6px; }
input, textarea, select {
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: #fff;
}
textarea { min-height: 120px; resize: vertical; }
.btn {
  display: inline-block;
  border: 0;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  font-weight: 600;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: #fee2e2; color: #7f1d1d; }
.btn-soft { background: #eef2ff; color: #3730a3; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.notice {
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 12px;
  border: 1px solid;
}
.notice.success { background: #dcfce7; border-color: #86efac; color: #166534; }
.notice.error { background: #fee2e2; border-color: #fecaca; color: #991b1b; }
.tag { display: inline-block; padding: 3px 8px; border-radius: 999px; font-size: .75rem; }
.tag.new { background: #dbeafe; color: #1d4ed8; }
.tag.contacted { background: #fef9c3; color: #854d0e; }
.tag.closed { background: #dcfce7; color: #166534; }
.login-wrap { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg,#0f172a,#1e293b); }
.login-card { width: 100%; max-width: 420px; background: #fff; border-radius: 18px; padding: 24px; box-shadow: 0 20px 50px rgba(0,0,0,.2); }
.login-card h1 { margin-top: 0; }
.muted { color: var(--muted); }
@media (max-width: 980px) {
  .admin-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
  .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; }
}