:root {
    --bg: #0f0f1a; --bg-card: #1a1a2e; --bg-card-hover: #22223a; --bg-input: #252540;
    --border: #2a2a45; --text: #e0e0e0; --text-muted: #6b7c93;
    --primary: #d4a574; --primary-hover: #e6b88a; --danger: #ef4444; --success: #10b981;
    --warning: #f59e0b; --info: #3b82f6; --sidebar-width: 220px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }
.layout { display: flex; min-height: 100vh; }
.sidebar { width: var(--sidebar-width); background: var(--bg-card); border-right: 1px solid var(--border); display: flex; flex-direction: column; position: fixed; top: 0; left: 0; height: 100vh; z-index: 100; }
.sidebar-header { padding: 24px 20px; border-bottom: 1px solid var(--border); }
.sidebar-header h2 { font-size: 1.2rem; color: #fff; }
.sidebar-subtitle { font-size: 0.75rem; color: var(--text-muted); margin-top: 2px; }
.sidebar-nav { flex: 1; padding: 10px 0; }
.sidebar-nav a { display: flex; align-items: center; padding: 12px 20px; color: var(--text-muted); transition: all 0.2s; font-size: 0.9rem; border-left: 3px solid transparent; }
.sidebar-nav a:hover { background: rgba(255,255,255,0.05); color: var(--text); }
.sidebar-nav a.active { background: rgba(212,165,116,0.1); color: var(--primary); border-left-color: var(--primary); }
.nav-icon { margin-right: 10px; font-size: 1.1rem; }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid var(--border); }
.main-content { flex: 1; margin-left: var(--sidebar-width); padding: 24px 32px; }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.page-header h1 { font-size: 1.5rem; color: #fff; }
.header-actions { display: flex; gap: 8px; }
.header-info { display: flex; align-items: center; gap: 12px; color: var(--text-muted); font-size: 0.9rem; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--bg-card); border-radius: 12px; padding: 20px; display: flex; align-items: center; gap: 16px; border: 1px solid var(--border); transition: all 0.2s; }
.stat-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.stat-icon { font-size: 2rem; width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; border-radius: 10px; }
.stat-icon-total { background: rgba(59,130,246,0.15); }
.stat-icon-active { background: rgba(16,185,129,0.15); }
.stat-icon-online { background: rgba(16,185,129,0.15); }
.stat-icon-login { background: rgba(245,158,11,0.15); }
.stat-icon-expired { background: rgba(239,68,68,0.15); }
.stat-info { display: flex; flex-direction: column; }
.stat-number { font-size: 1.5rem; font-weight: bold; color: #fff; }
.stat-label { font-size: 0.8rem; color: var(--text-muted); }
.card { background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border); margin-bottom: 20px; overflow: hidden; }
.card-header { padding: 16px 20px; border-bottom: 1px solid var(--border); }
.card-header h2 { font-size: 1rem; color: #fff; }
.card-body { padding: 16px 20px; }
.grid-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.table { width: 100%; border-collapse: collapse; }
.table th { text-align: left; padding: 10px 12px; font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); }
.table td { padding: 10px 12px; font-size: 0.9rem; border-bottom: 1px solid rgba(255,255,255,0.03); }
.table tr:hover td { background: rgba(255,255,255,0.02); }
.row-disabled td { opacity: 0.5; }
.row-expired td { opacity: 0.6; }
.action-btns { white-space: nowrap; display: flex; gap: 4px; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 0.75rem; font-weight: 500; }
.badge-success { background: rgba(16,185,129,0.15); color: #10b981; }
.badge-danger { background: rgba(239,68,68,0.15); color: #ef4444; }
.badge-warning { background: rgba(245,158,11,0.15); color: #f59e0b; }
.badge-secondary { background: rgba(107,124,147,0.15); color: #6b7c93; }
.btn { display: inline-block; padding: 8px 16px; border-radius: 6px; border: none; cursor: pointer; font-size: 0.9rem; font-weight: 500; transition: all 0.2s; }
.btn-primary { background: var(--primary); color: #1a1a2e; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }
.btn-block { display: block; width: 100%; text-align: center; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.9rem; margin-bottom: 6px; color: var(--text); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 10px 12px; background: var(--bg-input); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 0.9rem; transition: border-color 0.2s; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); }
.form-group small { display: block; margin-top: 4px; font-size: 0.75rem; color: var(--text-muted); }
.checkbox-label { display: flex !important; align-items: center; gap: 8px; cursor: pointer; }
.checkbox-label input { width: auto; }
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 0.9rem; }
.alert-success { background: rgba(16,185,129,0.1); color: #10b981; border: 1px solid rgba(16,185,129,0.2); }
.alert-error { background: rgba(239,68,68,0.1); color: #ef4444; border: 1px solid rgba(239,68,68,0.2); }
.search-bar, .filter-bar { display: flex; gap: 8px; margin-bottom: 16px; }
.search-bar input, .filter-bar input, .filter-bar select { padding: 8px 12px; background: var(--bg-input); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 0.9rem; }
.search-bar input:focus, .filter-bar input:focus, .filter-bar select:focus { outline: none; border-color: var(--primary); }
.search-bar input { flex: 1; }
.pagination { display: flex; gap: 4px; justify-content: center; margin-top: 20px; }
.pagination a { padding: 6px 12px; border: 1px solid var(--border); border-radius: 4px; color: var(--text-muted); font-size: 0.85rem; transition: all 0.2s; }
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination a.active { background: var(--primary); color: #1a1a2e; border-color: var(--primary); }
.modal { display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); }
.modal.show { display: flex; align-items: center; justify-content: center; }
.modal-content { background: var(--bg-card); border-radius: 16px; padding: 32px; max-width: 500px; width: 90%; position: relative; border: 1px solid var(--border); max-height: 90vh; overflow-y: auto; }
.modal-content h2 { margin-bottom: 20px; color: #fff; }
.modal-close { position: absolute; top: 16px; right: 20px; font-size: 1.5rem; cursor: pointer; color: var(--text-muted); }
.modal-close:hover { color: #fff; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-container { max-width: 400px; width: 100%; padding: 20px; }
.login-box { background: var(--bg-card); border-radius: 16px; padding: 40px; border: 1px solid var(--border); }
.login-header { text-align: center; margin-bottom: 30px; }
.login-header h1 { font-size: 1.8rem; color: #fff; }
.login-header p { color: var(--text-muted); margin-top: 8px; }
.login-footer { text-align: center; margin-top: 20px; font-size: 0.8rem; color: var(--text-muted); }
.login-footer .hint { color: var(--warning); margin-top: 4px; }
.upload-form input[type="file"] { background: var(--bg-input); padding: 10px; border-radius: 6px; border: 1px dashed var(--border); width: 100%; cursor: pointer; }
code { background: rgba(255,255,255,0.05); padding: 2px 6px; border-radius: 4px; font-family: monospace; font-size: 0.85rem; }