:root {
  --bg: #0f172a; --bg2: #1e293b; --card: #1e293b; --text: #e2e8f0; --muted: #94a3b8;
  --primary: #2563eb; --primary2: #1d4ed8; --border: #334155; --green: #16a34a; --red: #dc2626; --orange: #d97706;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; background: var(--bg); color: var(--text); }
a { cursor: pointer; color: var(--primary); }
button { cursor: pointer; font-family: inherit; }
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 30px; width: 380px; max-width: 100%; }
.login-card.wide { width: 640px; }
.login-card h1 { margin: 0 0 4px; font-size: 24px; }
.login-card h1 span { color: var(--primary); }
.sub { color: var(--muted); margin: 0 0 18px; font-size: 13px; }
.login-card input, .login-card textarea { width: 100%; padding: 10px 12px; margin-bottom: 10px; background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; color: var(--text); }
.login-card label { font-size: 12px; color: var(--muted); display: block; margin-bottom: 4px; }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab { flex: 1; padding: 8px; background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; color: var(--muted); }
.tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary { background: var(--primary); color: #fff; border: none; padding: 10px 16px; border-radius: 8px; font-weight: 600; }
.btn-primary:hover { background: var(--primary2); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--muted); padding: 8px 14px; border-radius: 8px; margin-top: 12px; }
.btn-sm { background: var(--bg2); border: 1px solid var(--border); color: var(--text); padding: 5px 10px; border-radius: 6px; font-size: 12px; text-decoration: none; display: inline-block; margin-right: 4px; }
.btn-danger { color: #fff; background: var(--red); border-color: var(--red); }
.msg { margin-top: 10px; font-size: 13px; color: var(--orange); }
.link { display: inline-block; margin-top: 14px; font-size: 12px; }
.ok { color: var(--green); font-weight: 600; }
.err { color: var(--red); }
.layout { display: flex; min-height: 100vh; }
.sidebar { width: 230px; background: var(--bg2); border-right: 1px solid var(--border); padding: 16px; display: flex; flex-direction: column; }
.brand { font-weight: 800; font-size: 18px; margin-bottom: 20px; }
.brand small { display: block; color: var(--muted); font-weight: 400; font-size: 11px; }
.sidebar nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.nav-item { padding: 10px 12px; border-radius: 8px; color: var(--muted); font-size: 14px; }
.nav-item:hover { background: var(--card); }
.nav-item.active { background: var(--primary); color: #fff; }
.side-foot { margin-top: 12px; font-size: 12px; color: var(--muted); display: flex; flex-direction: column; gap: 8px; }
.content { flex: 1; padding: 24px; overflow: auto; }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.page-header h1 { margin: 0; font-size: 22px; }
.detail-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 16px; }
.detail-card h3 { margin: 0 0 12px; font-size: 15px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; margin-bottom: 10px; }
.detail-card input, .detail-card select, .detail-card textarea { width: 100%; padding: 9px 11px; background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; color: var(--text); }
.detail-card textarea { width: 100%; margin-bottom: 10px; }
.form-actions { margin-top: 8px; }
.table-wrap { background: var(--card); border: 1px solid var(--border); border-radius: 12px; overflow: auto; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th, .data-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { color: var(--muted); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: .5px; }
.data-table tbody tr:hover { background: var(--bg2); }
.hint { color: var(--muted); font-size: 12px; margin: 0 0 12px; }