* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif; background: linear-gradient(135deg, #0f0f1e 0%, #1a1a2e 100%); color: #e0e0e0; min-height: 100vh; }
.container { display: flex; height: 100vh; }
.sidebar { width: 260px; background: linear-gradient(180deg, #16213e 0%, #0f3460 100%); padding: 30px 20px; border-right: 1px solid #1a4d7a; overflow-y: auto; box-shadow: 2px 0 10px rgba(0,0,0,0.3); }
.logo { font-size: 22px; font-weight: 700; background: linear-gradient(135deg, #00d4ff, #0099ff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; margin-bottom: 40px; text-align: center; letter-spacing: 1px; }
.menu-item { padding: 14px 18px; margin-bottom: 8px; border-radius: 8px; cursor: pointer; transition: all 0.3s ease; color: #b0b0b0; font-size: 14px; font-weight: 500; border-left: 3px solid transparent; }
.menu-item:hover { background: rgba(0, 212, 255, 0.1); color: #00d4ff; border-left-color: #00d4ff; }
.menu-item.active { background: linear-gradient(90deg, rgba(0, 212, 255, 0.2), transparent); color: #00d4ff; border-left-color: #00d4ff; }
.logout-item { margin-top: 30px; border-top: 1px solid #1a4d7a; padding-top: 20px; }
.main { flex: 1; padding: 40px; overflow-y: auto; background: linear-gradient(135deg, #0f0f1e 0%, #1a1a2e 100%); }
.header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; padding-bottom: 20px; border-bottom: 2px solid #1a4d7a; }
.header h1 { font-size: 32px; font-weight: 700; background: linear-gradient(135deg, #00d4ff, #0099ff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.btn { padding: 11px 24px; border: none; border-radius: 8px; cursor: pointer; font-size: 14px; font-weight: 600; transition: all 0.3s ease; display: inline-flex; align-items: center; gap: 8px; }
.btn-primary { background: linear-gradient(135deg, #00d4ff, #0099ff); color: #fff; box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0, 212, 255, 0.4); }
.btn-danger { background: linear-gradient(135deg, #ff4757, #ff3838); color: #fff; }
.btn-danger:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(255, 71, 87, 0.3); }
.btn-warning { background: linear-gradient(135deg, #ffa502, #ff8c00); color: #fff; }
.btn-warning:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(255, 165, 2, 0.3); }
.btn-sm { padding: 8px 14px; font-size: 12px; }
.card { background: rgba(26, 26, 46, 0.8); border-radius: 12px; padding: 24px; margin-bottom: 24px; border: 1px solid #1a4d7a; backdrop-filter: blur(10px); box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3); }
.card h3 { font-size: 18px; margin-bottom: 20px; color: #00d4ff; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; color: #00d4ff; font-weight: 600; font-size: 13px; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px 14px; border: 1px solid #1a4d7a; border-radius: 8px; background: rgba(15, 15, 30, 0.8); color: #e0e0e0; font-size: 14px; transition: all 0.3s ease; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: #00d4ff; box-shadow: 0 0 10px rgba(0, 212, 255, 0.2); background: rgba(15, 15, 30, 0.95); }
.form-group textarea { min-height: 120px; resize: vertical; font-family: inherit; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-actions { display: flex; gap: 12px; margin-top: 24px; }
table { width: 100%; border-collapse: collapse; }
table th { background: rgba(0, 212, 255, 0.1); color: #00d4ff; font-weight: 600; padding: 16px; text-align: left; border-bottom: 2px solid #1a4d7a; font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px; }
table td { padding: 14px 16px; border-bottom: 1px solid #1a4d7a; font-size: 14px; }
table tr:hover { background: rgba(0, 212, 255, 0.05); }
.img-preview { max-width: 80px; max-height: 80px; border-radius: 6px; border: 1px solid #1a4d7a; }
.login-container { display: flex; justify-content: center; align-items: center; height: 100vh; background: linear-gradient(135deg, #0f0f1e 0%, #1a1a2e 100%); }
.login-box { background: rgba(26, 26, 46, 0.9); padding: 50px; border-radius: 16px; width: 420px; border: 1px solid #1a4d7a; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5); backdrop-filter: blur(10px); }
.login-box h2 { text-align: center; margin-bottom: 10px; background: linear-gradient(135deg, #00d4ff, #0099ff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-size: 28px; font-weight: 700; }
.login-box .subtitle { text-align: center; color: #888; margin-bottom: 30px; font-size: 13px; }
.login-box .form-group input { background: rgba(15, 15, 30, 0.9); }
.login-box .btn { width: 100%; justify-content: center; margin-top: 10px; }
.login-hint { margin-top: 24px; padding: 12px; background: rgba(0, 212, 255, 0.1); border-left: 3px solid #00d4ff; border-radius: 6px; font-size: 12px; color: #b0b0b0; }
.hidden { display: none; }
.status-badge { padding: 6px 12px; border-radius: 20px; font-size: 12px; font-weight: 600; display: inline-block; }
.status-pending { background: rgba(251, 191, 36, 0.2); color: #fbbf24; }
.status-completed { background: rgba(16, 185, 129, 0.2); color: #10b981; }
.status-cancelled { background: rgba(239, 68, 68, 0.2); color: #ef4444; }
.status-refunded { background: rgba(139, 92, 246, 0.2); color: #a78bfa; }
.status-refunding { background: rgba(249, 115, 22, 0.2); color: #fb923c; }
.status-unpaid { background: rgba(107, 114, 128, 0.2); color: #9ca3af; }
.status-paid { background: rgba(16, 185, 129, 0.2); color: #10b981; }
@media (max-width: 1200px) { .form-row { grid-template-columns: 1fr; } }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: rgba(26, 77, 122, 0.1); }
::-webkit-scrollbar-thumb { background: rgba(0, 212, 255, 0.3); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0, 212, 255, 0.5); }