:root {
  --primary: #6366f1;
  --bg: #0f0f23;
  --bg-card: rgba(255,255,255,0.03);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --border: rgba(255,255,255,0.08);
  --radius: 8px;
  --sidebar-w: 240px;
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; background:var(--bg); color:var(--text); line-height:1.6; min-height:100vh; }
a { color:var(--text); text-decoration:none; }

/* Login */
.login-page { display:flex; align-items:center; justify-content:center; min-height:100vh; background:radial-gradient(ellipse at 50% 0%,rgba(99,102,241,0.15),transparent 70%); }
.login-box { background:var(--bg-card); border:1px solid var(--border); border-radius:12px; padding:48px; width:380px; text-align:center; }
.login-box h1 { font-size:1.8rem; background:linear-gradient(135deg,var(--primary),#06b6d4); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.login-box p { color:var(--text-muted); margin:8px 0 24px; }
.login-box input { width:100%; padding:12px 16px; background:rgba(255,255,255,0.05); border:1px solid var(--border); border-radius:var(--radius); color:var(--text); margin-bottom:12px; outline:none; font-size:0.95rem; }
.login-box input:focus { border-color:var(--primary); }
.login-box .btn-primary { width:100%; }
.hint { font-size:0.8rem; color:var(--text-muted); margin-top:16px; }

.alert { padding:12px 16px; border-radius:var(--radius); margin-bottom:16px; }
.alert-success { background:rgba(16,185,129,0.1); border:1px solid rgba(16,185,129,0.3); color:#10b981; }
.alert-error { background:rgba(239,68,68,0.1); border:1px solid rgba(239,68,68,0.3); color:#ef4444; }

/* Sidebar */
.sidebar { position:fixed; top:0; left:0; bottom:0; width:var(--sidebar-w); background:rgba(255,255,255,0.02); border-right:1px solid var(--border); display:flex; flex-direction:column; z-index:100; }
.sidebar-brand { padding:20px; border-bottom:1px solid var(--border); }
.sidebar-brand a { font-size:1.2rem; font-weight:800; background:linear-gradient(135deg,var(--primary),#06b6d4); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.sidebar-brand span { font-size:0.8rem; -webkit-text-fill-color:var(--text-muted); margin-left:4px; }
.sidebar-nav { flex:1; padding:12px 0; overflow-y:auto; }
.sidebar-nav a { display:flex; align-items:center; gap:10px; padding:10px 20px; font-size:0.9rem; transition:all 0.2s; }
.sidebar-nav a:hover, .sidebar-nav a.active { background:rgba(99,102,241,0.1); color:var(--primary); border-right:2px solid var(--primary); }
.sidebar-footer { padding:12px 20px; border-top:1px solid var(--border); display:flex; flex-direction:column; gap:4px; }
.sidebar-footer a { font-size:0.85rem; color:var(--text-muted); padding:4px 0; }

/* Main content */
.main-content { margin-left:var(--sidebar-w); padding:24px 32px; }
.page-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:24px; }
.page-header h2 { font-size:1.5rem; }

/* Stats cards */
.stats-cards { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.stat-card { background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius); padding:28px; display:flex; flex-direction:column; align-items:center; gap:8px; }
.stat-card i { font-size:2rem; color:var(--primary); }
.stat-card .stat-num { font-size:2.5rem; font-weight:800; }
.stat-card .stat-lbl { color:var(--text-muted); font-size:0.9rem; }
.stat-card.highlight { border-color:rgba(239,68,68,0.3); }

/* Data table */
.data-table { width:100%; border-collapse:collapse; font-size:0.9rem; }
.data-table th { text-align:left; padding:12px 16px; border-bottom:1px solid var(--border); color:var(--text-muted); font-weight:600; font-size:0.8rem; text-transform:uppercase; }
.data-table td { padding:12px 16px; border-bottom:1px solid rgba(255,255,255,0.04); }
.data-table tr:hover td { background:rgba(255,255,255,0.02); }
.data-table tr.unread td { background:rgba(99,102,241,0.05); }

/* Buttons */
.btn-primary { padding:10px 24px; background:linear-gradient(135deg,var(--primary),#4f46e5); color:#fff; border:none; border-radius:6px; font-weight:600; cursor:pointer; transition:all 0.2s; font-size:0.9rem; }
.btn-primary:hover { transform:translateY(-1px); box-shadow:0 4px 12px rgba(99,102,241,0.3); }
.btn-secondary { padding:10px 24px; background:transparent; color:var(--text); border:1px solid var(--border); border-radius:6px; cursor:pointer; }
.btn-sm { padding:4px 12px; background:rgba(255,255,255,0.05); border:1px solid var(--border); border-radius:4px; color:var(--text); cursor:pointer; font-size:0.8rem; }
.btn-sm:hover { border-color:var(--primary); }
.btn-danger { color:#ef4444; border-color:rgba(239,68,68,0.3); }
.btn-danger:hover { background:rgba(239,68,68,0.1); }
.btn-xs { padding:2px 8px; font-size:0.75rem; background:rgba(255,255,255,0.05); border:1px solid var(--border); border-radius:4px; color:var(--text); cursor:pointer; }

/* Badges */
.badge { display:inline-block; padding:2px 8px; border-radius:10px; font-size:0.75rem; font-weight:600; }
.badge-success { background:rgba(16,185,129,0.15); color:#10b981; }
.badge-muted { background:rgba(255,255,255,0.05); color:var(--text-muted); }
.badge-warning { background:rgba(245,158,11,0.15); color:#f59e0b; }
.badge-danger { background:rgba(239,68,68,0.15); color:#ef4444; }

/* Forms */
.form-group { margin-bottom:16px; }
.form-group label { display:block; margin-bottom:6px; color:var(--text-muted); font-size:0.85rem; }
.form-group input, .form-group textarea, .form-group select { width:100%; padding:10px 14px; background:rgba(255,255,255,0.05); border:1px solid var(--border); border-radius:6px; color:var(--text); font-size:0.9rem; outline:none; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color:var(--primary); }
.form-group textarea { resize:vertical; font-family:inherit; }
.form-group select { cursor:pointer; }
.form-group select option { background:var(--bg); }
.form-group input[type="color"] { width:60px; height:40px; padding:2px; }
.form-group input[type="checkbox"] { width:auto; }
.settings-form { max-width:600px; }

/* Modal */
.modal { display:none; position:fixed; inset:0; z-index:2000; background:rgba(0,0,0,0.7); align-items:center; justify-content:center; }
.modal.show { display:flex; }
.modal-content { background:var(--bg); border:1px solid var(--border); border-radius:12px; max-width:600px; width:90%; max-height:80vh; overflow-y:auto; padding:32px; position:relative; }
.modal-close { position:absolute; top:12px; right:20px; font-size:1.5rem; cursor:pointer; color:var(--text-muted); }
.modal-content h3 { margin-bottom:20px; }

/* Settings */
.settings-form .form-group { margin-bottom:20px; }

@media (max-width:768px) {
  .sidebar { width:100%; position:relative; height:auto; }
  .main-content { margin-left:0; padding:16px; }
  .stats-cards { grid-template-columns:1fr 1fr; }
  .login-box { width:100%; max-width:380px; }
}