:root {
        --sidebar-bg: #1e293b;
        --main-bg: #4b5563;
        --text-white: #ffffff;
        --text-gray: #d1d5db;
        --banner-gradient-start: #a855f7;
        --banner-gradient-end: #ec4899;
        --green-check: #22c55e;
        --gray-check: #9ca3af;
        --yellow-button: #eab308;
        --purple-user: #a855f7;
        --premium-bg: #eab308;
        --link-blue: #60a5fa;
        --award-yellow: #fde047;
        --transition-speed: 0.3s;
        --card-bg: rgba(255, 255, 255, 0.05);
        --primary: #4361ee;
        --secondary: #3a0ca3;
        --gray: #adb5bd;
        --warning: #ffd166;
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    body {
        background-color: var(--main-bg);
        color: var(--text-white);
        display: flex;
        min-height: 100vh;
        overflow-x: hidden;
    }

    .sidebar {
        width: 220px;
        background-color: var(--sidebar-bg);
        padding: 20px 15px;
        position: fixed;
        height: 100vh;
        overflow-y: auto;
        z-index: 1000;
        display: flex;
        flex-direction: column;
        transition: transform var(--transition-speed);
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
    }

    .sidebar.collapsed {
        transform: translateX(-100%);
    }

    .sidebar .logo {
        display: flex;
        align-items: center;
        margin-bottom: 30px;
        padding-bottom: 10px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .sidebar .logo img {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        margin-right: 10px;
        transition: transform 0.3s ease;
    }

    .sidebar .logo img:hover {
        transform: scale(1.1);
    }

    .sidebar .logo-text {
        font-size: 18px;
        font-weight: bold;
        color: var(--yellow-button);
    }

    .sidebar .logo-subtext {
        font-size: 12px;
        color: var(--text-gray);
    }

    .sidebar ul {
        list-style: none;
        flex: 1;
    }

    .sidebar ul li {
        margin-bottom: 10px;
    }

    .sidebar ul li a {
        display: flex;
        align-items: center;
        color: var(--text-gray);
        text-decoration: none;
        padding: 8px 10px;
        border-radius: 6px;
        transition: background var(--transition-speed), transform var(--transition-speed);
    }

    .sidebar ul li a:hover {
        background-color: rgba(255, 255, 255, 0.1);
        color: var(--text-white);
        transform: translateX(5px);
    }

    .sidebar ul li a i {
        margin-right: 10px;
        width: 20px;
        text-align: center;
        transition: color var(--transition-speed);
    }

    .sidebar ul li a:hover i {
        color: var(--yellow-button);
    }

    .sidebar .user-info {
        display: flex;
        align-items: center;
        padding: 10px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        margin-top: auto;
        background: rgba(255, 255, 255, 0.03);
        border-radius: 8px;
    }

    .sidebar .user-avatar {
        background-color: var(--purple-user);
        color: var(--text-white);
        width: 30px;
        height: 30px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        margin-right: 10px;
        box-shadow: 0 0 5px rgba(168, 85, 247, 0.5);
    }

    .sidebar .user-text {
        font-size: 14px;
    }

    .sidebar .user-status {
        font-size: 12px;
        color: var(--text-gray);
    }

    .main-content {
        flex: 1;
        margin-left: 220px;
        padding: 20px;
        transition: margin-left var(--transition-speed);
        background: rgba(75, 85, 99, 0.9);
        backdrop-filter: blur(5px);
    }

    .main-content.expanded {
        margin-left: 0;
    }

    .topbar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 40px;
        padding: 10px 20px;
        background: rgba(30, 41, 59, 0.8);
        border-radius: 10px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .topbar .logo {
        display: flex;
        align-items: center;
    }

    .topbar .logo img {
        width: 30px;
        height: 30px;
        margin-right: 10px;
    }

    .topbar .logo-text {
        font-size: 18px;
        font-weight: bold;
        color: var(--yellow-button);
    }

    .topbar nav {
        display: flex;
        gap: 20px;
    }

    .topbar nav a {
        color: var(--link-blue);
        text-decoration: none;
        font-weight: 500;
        transition: color var(--transition-speed);
    }

    .topbar nav a:hover {
        color: var(--primary);
    }

    .topbar .right {
        display: flex;
        align-items: center;
        gap: 15px;
    }

    .topbar .toggle-btn {
        background: linear-gradient(90deg, var(--primary), var(--secondary));
        color: var(--text-white);
        border: none;
        border-radius: 50%;
        width: 40px;
        height: 40px;
        font-size: 18px;
        cursor: pointer;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
        transition: transform var(--transition-speed), background var(--transition-speed);
    }

    .topbar .toggle-btn:hover {
        transform: scale(1.1);
        background: linear-gradient(90deg, #2a4494, #270a66);
    }

    .topbar .notification {
        position: relative;
    }

    .topbar .notification i {
        color: var(--text-gray);
        font-size: 18px;
        transition: color var(--transition-speed);
    }

    .topbar .notification i:hover {
        color: var(--warning);
    }

    .topbar .notification .dot {
        position: absolute;
        top: -2px;
        right: -2px;
        width: 8px;
        height: 8px;
        background-color: #ef4444;
        border-radius: 50%;
    }

    .topbar .user {
        display: flex;
        align-items: center;
        gap: 5px;
    }

    .topbar .user-avatar {
        background-color: var(--premium-bg);
        color: #000;
        width: 25px;
        height: 25px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        font-size: 12px;
        box-shadow: 0 0 5px rgba(234, 179, 8, 0.5);
    }

    .topbar .user-name {
        font-weight: 500;
        color: var(--text-white);
    }

    .topbar .premium {
        background-color: var(--premium-bg);
        color: #000;
        padding: 2px 6px;
        border-radius: 4px;
        font-size: 12px;
        font-weight: bold;
    }

    .topbar .logout i {
        color: var(--text-gray);
        font-size: 18px;
        transition: color var(--transition-speed);
    }

    .topbar .logout i:hover {
        color: #ef4444;
    }

    .banner {
        max-width: 400px;
        margin: 0 auto 40px;
        background: linear-gradient(135deg, var(--banner-gradient-start), var(--banner-gradient-end));
        border-radius: 16px;
        padding: 20px;
        text-align: center;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        animation: pulse 2s infinite;
    }

    @keyframes pulse {
        0% { transform: scale(1); }
        50% { transform: scale(1.05); }
        100% { transform: scale(1); }
    }

    .banner .title {
        font-size: 16px;
        margin-bottom: 15px;
        color: var(--text-white);
        font-weight: bold;
    }

    .banner p {
        font-size: 14px;
        line-height: 1.4;
        margin-bottom: 15px;
        color: var(--award-yellow);
    }

    .banner .footer {
        font-size: 12px;
        color: rgba(255, 255, 255, 0.8);
        font-style: italic;
    }

    .packages-section {
        text-align: center;
    }

    .packages-section h1 {
        font-size: 24px;
        margin-bottom: 10px;
        color: var(--yellow-button);
        text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    }

    .packages-section .subtitle {
        font-size: 14px;
        color: var(--text-gray);
        margin-bottom: 30px;
    }

    .packages {
        display: flex;
        justify-content: center;
        gap: 20px;
    }

    .package-card {
        background-color: #6b7280;
        border-radius: 12px;
        padding: 20px;
        width: 200px;
        text-align: left;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    }

    .package-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    }

    .package-header {
        display: flex;
        align-items: center;
        margin-bottom: 15px;
    }

    .package-header i {
        color: var(--text-gray);
        margin-right: 10px;
        font-size: 18px;
    }

    .package-header .name {
        font-size: 18px;
        font-weight: bold;
        color: var(--yellow-button);
    }

    .package-features {
        list-style: none;
        margin-bottom: 20px;
    }

    .package-features li {
        display: flex;
        align-items: center;
        margin-bottom: 8px;
        color: var(--text-gray);
        font-size: 14px;
        transition: color var(--transition-speed);
    }

    .package-features li:hover {
        color: var(--text-white);
    }

    .package-features li i {
        margin-right: 10px;
    }

    .package-features .checked i {
        color: var(--green-check);
    }

    .package-features .unchecked i {
        color: var(--gray-check);
    }

    .package-award {
        font-size: 16px;
        font-weight: bold;
        color: var(--award-yellow);
        margin-bottom: 10px;
        text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    }

    .package-button {
        background-color: var(--yellow-button);
        color: #000;
        padding: 8px 16px;
        border: none;
        border-radius: 6px;
        font-weight: bold;
        cursor: pointer;
        width: 100%;
        transition: background var(--transition-speed), transform var(--transition-speed);
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }

    .package-button:hover {
        background-color: #d97706;
        transform: scale(1.05);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    }

    .welcome {
        display: flex;
        align-items: center;
        margin-bottom: 20px;
        padding: 15px;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 10px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .user-avatar {
        width: 50px;
        height: 50px;
        border-radius: 50%;
        background-color: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-white);
        font-size: 20px;
        margin-right: 15px;
        box-shadow: 0 0 10px rgba(67, 97, 238, 0.5);
    }

    .welcome-text h2 {
        font-size: 18px;
        margin-bottom: 5px;
        color: var(--text-white);
    }

    .welcome-text p {
        color: var(--gray);
        font-size: 14px;
    }

    .balance-cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        margin-bottom: 30px;
    }

    .card {
        background-color: #6b7280;
        border-radius: 12px;
        padding: 20px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        transition: transform var(--transition-speed);
    }

    .card:hover {
        transform: translateY(-5px);
    }

    .card-title {
        font-size: 16px;
        color: var(--gray);
        margin-bottom: 15px;
    }

    .meta-balance {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .balance-amount {
        font-size: 28px;
        font-weight: 700;
        color: var(--primary);
        text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    }

    .balance-actions {
        display: flex;
        gap: 10px;
    }

    .btn {
        padding: 8px 15px;
        border-radius: 5px;
        border: none;
        font-weight: 600;
        cursor: pointer;
        transition: all var(--transition-speed);
    }

    .btn-primary {
        background-color: var(--primary);
        color: var(--text-white);
    }

    .btn-primary:hover {
        background-color: var(--secondary);
        transform: scale(1.05);
    }

    .btn-outline {
        background-color: transparent;
        border: 1px solid var(--primary);
        color: var(--primary);
    }

    .btn-outline:hover {
        background-color: var(--primary);
        color: var(--text-white);
        transform: scale(1.05);
    }

    .stats {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
        margin-bottom: 30px;
    }

    .stat-card {
        background-color: #6b7280;
        border-radius: 12px;
        padding: 20px;
        text-align: center;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        transition: transform var(--transition-speed);
    }

    .stat-card:hover {
        transform: translateY(-5px);
    }

    .stat-value {
        font-size: 24px;
        font-weight: 700;
        margin: 10px 0;
        color: var(--primary);
    }

    .stat-label {
        color: var(--gray);
        font-size: 14px;
    }

    .dashboard-cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 20px;
        margin-bottom: 30px;
    }

    .dashboard-card {
        background-color: #6b7280;
        border-radius: 12px;
        padding: 20px;
        color: var(--text-white);
        text-align: center;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        transition: transform var(--transition-speed);
    }

    .dashboard-card:hover {
        transform: translateY(-5px);
    }

    .dashboard-card h2 {
        margin: 10px 0;
        font-size: 22px;
        color: var(--primary);
    }

    .dashboard-card p {
        font-size: 14px;
        color: var(--gray);
    }

    .dashboard-btn {
        background: var(--yellow-button);
        color: #000;
        padding: 8px 18px;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        font-weight: bold;
        margin-top: 10px;
        transition: background var(--transition-speed), transform var(--transition-speed);
    }

    .dashboard-btn:hover {
        background: #d97706;
        transform: scale(1.05);
    }

    .modal {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 2000;
        justify-content: center;
        align-items: center;
    }

    .modal-content {
        background-color: var(--sidebar-bg);
        padding: 30px;
        border-radius: 10px;
        width: 90%;
        max-width: 500px;
        color: var(--text-white);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        animation: fadeIn 0.3s ease;
    }

    @keyframes fadeIn {
        from { opacity: 0; transform: scale(0.9); }
        to { opacity: 1; transform: scale(1); }
    }

    .modal-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 10px;
    }

    .close {
        font-size: 24px;
        cursor: pointer;
        color: var(--gray);
        transition: color var(--transition-speed);
    }

    .close:hover {
        color: #ef4444;
    }

    .form-group {
        margin-bottom: 20px;
    }

    .form-group label {
        display: block;
        margin-bottom: 5px;
        font-weight: 600;
        color: var(--text-white);
    }

    .form-group input, .form-group select {
        width: 100%;
        padding: 10px;
        border: 1px solid var(--gray);
        border-radius: 5px;
        background: rgba(255, 255, 255, 0.1);
        color: var(--text-white);
        transition: border-color var(--transition-speed);
    }

    .form-group input:focus, .form-group select:focus {
        border-color: var(--primary);
        outline: none;
    }

    @media (max-width: 768px) {
        .sidebar {
            transform: translateX(-100%);
        }

        .sidebar.active {
            transform: translateX(0);
        }

        .main-content {
            margin-left: 0;
        }

        .main-content.expanded {
            margin-left: 0;
        }

        .packages {
            flex-direction: column;
            align-items: center;
        }

        .balance-cards, .stats, .dashboard-cards {
            grid-template-columns: 1fr;
        }

        .balance-actions {
            flex-direction: column;
        }

        .topbar {
            flex-direction: column;
            gap: 15px;
        }

        .topbar nav {
            flex-direction: column;
            gap: 10px;
        }
    }