* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg: #0f172a; --surface: #1e293b; --surface2: #334155;
    --text: #e2e8f0; --text2: #94a3b8; --accent: #6B4C9A;
    --accent2: #8B5CF6; --success: #22c55e; --warning: #f59e0b;
    --danger: #ef4444; --border: rgba(255,255,255,0.08);
}
body { font-family: 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }

/* Layout */
.app { display: flex; min-height: 100vh; }
.sidebar { width: 240px; background: var(--surface); border-right: 1px solid var(--border); padding: 1.5rem 0; position: fixed; height: 100vh; overflow-y: auto; }
.main { margin-left: 240px; flex: 1; padding: 2rem; }

/* Sidebar */
.sidebar .logo { padding: 0 1.5rem 1.5rem; border-bottom: 1px solid var(--border); }
.sidebar .logo h2 { font-size: 1.1rem; color: var(--accent2); }
.sidebar .logo p { font-size: 0.75rem; color: var(--text2); }
.nav-item { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem 1.5rem; color: var(--text2); cursor: pointer; transition: all 0.2s; text-decoration: none; }
.nav-item:hover, .nav-item.active { background: rgba(107,76,154,0.15); color: var(--text); border-right: 3px solid var(--accent); }
.nav-item .icon { font-size: 1.1rem; width: 24px; text-align: center; }

/* Cards */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; margin-bottom: 1.5rem; }
.card h3 { font-size: 1rem; color: var(--text2); margin-bottom: 1rem; font-weight: 500; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem; }
.stat-card .value { font-size: 2rem; font-weight: 700; color: var(--accent2); }
.stat-card .label { font-size: 0.8rem; color: var(--text2); margin-top: 0.25rem; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.85rem; color: var(--text2); margin-bottom: 0.4rem; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 10px 14px; background: var(--bg); border: 1px solid var(--border);
    border-radius: 8px; color: var(--text); font-size: 0.9rem; outline: none;
}
.form-group input:focus, .form-group select:focus { border-color: var(--accent); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* Buttons */
.btn { padding: 10px 20px; border: none; border-radius: 8px; font-size: 0.9rem; cursor: pointer; font-weight: 600; transition: all 0.2s; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: white; }
.btn-primary:hover { opacity: 0.9; }
.btn-secondary { background: var(--surface2); color: var(--text); }
.btn-danger { background: var(--danger); color: white; }
.btn-success { background: var(--success); color: white; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn-group { display: flex; gap: 0.5rem; margin-top: 1rem; }

/* Table */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.75rem 1rem; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--text2); font-size: 0.8rem; font-weight: 600; text-transform: uppercase; }
td { font-size: 0.85rem; }
tr:hover { background: rgba(255,255,255,0.02); }

/* Badges */
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-success { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-info { background: rgba(107,76,154,0.15); color: var(--accent2); }

/* Sections */
.section { display: none; }
.section.active { display: block; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.section-header h1 { font-size: 1.5rem; }

/* Toast */
.toast { position: fixed; top: 1rem; right: 1rem; padding: 1rem 1.5rem; border-radius: 8px; color: white; font-size: 0.9rem; z-index: 1000; animation: slideIn 0.3s; }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Settings key fields */
.key-field { position: relative; }
.key-field input { padding-right: 40px; }
.key-field .toggle-vis { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); cursor: pointer; color: var(--text2); background: none; border: none; font-size: 1.1rem; }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { display: none; }
    .main { margin-left: 0; }
    .form-row { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}