:root {
        --primary-color: #0A84FF;
        --primary-dark: #0056b3;
        --secondary-color: #30D158;
        --dark-bg: #000000;
        --dark-surface: rgba(28, 28, 30, 0.6);
        --dark-surface-solid: #1C1C1E;
        --glass-bg: rgba(28, 28, 30, 0.5);
        --glass-border: rgba(255, 255, 255, 0.1);
        --text-primary: #FFFFFF;
        --text-secondary: #EBEBF599;
        --text-tertiary: #EBEBF54D;
        --success-color: #30D158;
        --warning-color: #FF9F0A;
        --danger-color: #FF453A;
        --card-shadow: rgba(0, 0, 0, 0.2);
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    }

    body {
        background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
        color: var(--text-primary);
        line-height: 1.6;
        min-height: 100vh;
        padding: 20px;
        display: flex;
        flex-direction: column;
        position: relative;
        overflow-x: hidden;
    }

    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: radial-gradient(circle at 20% 30%, rgba(10, 132, 255, 0.15) 0%, transparent 60%),
                    radial-gradient(circle at 80% 70%, rgba(48, 209, 88, 0.1) 0%, transparent 40%);
        pointer-events: none;
        z-index: -1;
    }

    .header {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        width: 100%;
        max-width: 1200px;
        margin: 0 auto 30px;
    }

    .user-menu {
        position: relative;
    }

    .user-btn {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 12px 20px;
        background: var(--glass-bg);
        color: var(--text-primary);
        border: 1px solid var(--glass-border);
        border-radius: 12px;
        cursor: pointer;
        transition: all 0.3s ease;
        font-weight: 500;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }

    .user-btn:hover {
        background: rgba(10, 132, 255, 0.2);
        transform: translateY(-2px);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    }

    .user-dropdown {
        position: absolute;
        top: 100%;
        left: 0;
        width: 200px;
        background: var(--glass-bg);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--glass-border);
        border-radius: 12px;
        padding: 10px 0;
        margin-top: 8px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.3s ease;
        z-index: 100;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    }

    .user-menu:hover .user-dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .user-dropdown a {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 12px 20px;
        color: var(--text-primary);
        text-decoration: none;
        transition: all 0.2s ease;
    }

    .user-dropdown a:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    .ping-display {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 10px 16px;
        background: var(--glass-bg);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-radius: 12px;
        font-size: 16px;
        color: var(--text-primary);
        border: 1px solid var(--glass-border);
    }

    .ping-value {
        font-weight: 600;
    }

    .ping-good {
        color: var(--success-color);
    }

    .ping-medium {
        color: var(--warning-color);
    }

    .ping-bad {
        color: var(--danger-color);
    }

    .container {
        flex: 1;
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
    }

    .main {
        width: 100%;
        max-width: 1000px;
        background: var(--glass-bg);
        border-radius: 24px;
        box-shadow: 0 25px 50px var(--card-shadow);
        padding: 30px;
        margin: 0 auto;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: 1px solid var(--glass-border);
    }

    h1 {
        text-align: center;
        margin-bottom: 10px;
        color: var(--text-primary);
        font-size: 32px;
        font-weight: 700;
        letter-spacing: -0.5px;
    }

    .subtitle {
        text-align: center;
        margin-bottom: 40px;
        color: var(--text-secondary);
        font-size: 18px;
        font-weight: 400;
    }

    /* Search Bar */
    .search-container {
        display: flex;
        justify-content: center;
        margin-bottom: 25px;
    }

    .search-bar {
        display: flex;
        align-items: center;
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        border-radius: 12px;
        padding: 0 15px;
        width: 100%;
        max-width: 500px;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        transition: all 0.3s ease;
    }

    .search-bar:focus-within {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 2px rgba(10, 132, 255, 0.2);
    }

    .search-bar i {
        color: var(--text-secondary);
        margin-right: 10px;
    }

    .search-input {
        background: transparent;
        border: none;
        color: var(--text-primary);
        padding: 14px 0;
        width: 100%;
        font-size: 16px;
        outline: none;
    }

    .search-input::placeholder {
        color: var(--text-secondary);
    }

    .tools-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 25px;
        margin-top: 20px;
    }

    .tool-card {
        background: rgba(44, 44, 46, 0.5);
        border-radius: 20px;
        padding: 25px;
        border: 1px solid var(--glass-border);
        transition: all 0.3s ease;
        display: flex;
        flex-direction: column;
        height: 100%;
        position: relative;
    }

    .tool-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
        border-color: var(--primary-color);
    }

    .tool-icon {
        font-size: 40px;
        margin-bottom: 20px;
        color: var(--primary-color);
        text-align: center;
    }

    .tool-name {
        font-size: 22px;
        font-weight: 600;
        margin-bottom: 15px;
        color: var(--text-primary);
        text-align: center;
    }

    .tool-description {
        color: var(--text-secondary);
        margin-bottom: 25px;
        flex-grow: 1;
        line-height: 1.5;
    }

    .tool-features {
        margin-bottom: 25px;
    }

    .tool-feature {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 8px;
        color: var(--text-secondary);
        font-size: 14px;
    }

    .feature-icon {
        color: var(--success-color);
        font-size: 12px;
    }

    .tool-buttons {
        display: flex;
        gap: 10px;
    }

    .tool-button {
        display: block;
        padding: 14px;
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
        color: white;
        border: none;
        border-radius: 12px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.3s ease;
        text-align: center;
        text-decoration: none;
        box-shadow: 0 4px 12px rgba(10, 132, 255, 0.3);
        flex: 1;
    }

    .tool-button:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(10, 132, 255, 0.4);
    }

    .info-button {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 46px;
        padding: 14px;
        background: var(--glass-bg);
        color: var(--text-primary);
        border: 1px solid var(--glass-border);
        border-radius: 12px;
        cursor: pointer;
        transition: all 0.3s ease;
    }

    .info-button:hover {
        background: rgba(255, 255, 255, 0.1);
        transform: translateY(-2px);
    }

    /* Pagination */
    .pagination {
        display: flex;
        justify-content: center;
        align-items: center;
        margin-top: 30px;
        gap: 15px;
    }

    .page-button {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: var(--glass-bg);
        color: var(--text-primary);
        border: 1px solid var(--glass-border);
        border-radius: 10px;
        cursor: pointer;
        transition: all 0.3s ease;
        font-weight: 600;
    }

    .page-button:hover:not(.disabled) {
        background: rgba(10, 132, 255, 0.2);
        border-color: var(--primary-color);
    }

    .page-button.active {
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
        border-color: var(--primary-color);
    }

    .page-button.disabled {
        opacity: 0.5;
        cursor: not-allowed;
    }

    /* Copyright */
    .copyright {
        text-align: center;
        margin-top: 30px;
        color: var(--text-secondary);
        font-size: 14px;
        padding: 15px 0;
        border-top: 1px solid var(--glass-border);
    }

    /* Tool Info Modal */
    .modal-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.7);
        display: flex;
        justify-content: center;
        align-items: center;
        z-index: 1000;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        backdrop-filter: blur(5px);
        -webkit-backdrop-filter: blur(5px);
    }

    .modal-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    .modal {
        background: var(--glass-bg);
        border: 1px solid var(--glass-border);
        border-radius: 20px;
        width: 90%;
        max-width: 500px;
        padding: 25px;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
        transform: translateY(20px);
        transition: all 0.3s ease;
        position: relative;
    }

    .modal-overlay.active .modal {
        transform: translateY(0);
    }

    .modal-close {
        position: absolute;
        top: 20px;
        right: 20px;
        background: transparent;
        border: none;
        color: var(--text-primary);
        font-size: 20px;
        cursor: pointer;
        width: 30px;
        height: 30px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        transition: all 0.2s ease;
    }

    .modal-close:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    .modal-title {
        font-size: 22px;
        margin-bottom: 20px;
        color: var(--text-primary);
        padding-right: 30px;
    }

    .modal-content {
        color: var(--text-secondary);
    }

    .info-item {
        display: flex;
        justify-content: space-between;
        padding: 10px 0;
        border-bottom: 1px solid var(--glass-border);
    }

    .info-item:last-child {
        border-bottom: none;
    }

    .info-label {
        font-weight: 500;
        color: var(--text-primary);
    }

    .info-value {
        text-align: right;
    }

    /* Connection Status */
    .connection-status {
        position: fixed;
        bottom: -100px;
        left: 50%;
        transform: translateX(-50%);
        background: var(--glass-bg);
        padding: 16px 24px;
        border-radius: 16px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        display: flex;
        align-items: center;
        gap: 12px;
        z-index: 1000;
        opacity: 0;
        transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        border: 1px solid var(--glass-border);
        max-width: 90%;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        color: var(--text-primary);
    }

    .connection-status.show {
        bottom: 20px;
        opacity: 1;
    }

    .connection-status.hide {
        bottom: 20px;
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }

    .connection-status.offline {
        color: var(--text-primary);
    }

    .connection-status.online {
        color: var(--success-color);
    }

    .connection-spinner {
        width: 20px;
        height: 20px;
        border: 2px solid rgba(255, 255, 255, 0.2);
        border-radius: 50%;
        border-top-color: currentColor;
        animation: spin 1s linear infinite;
    }

    .connection-check {
        display: none;
        color: var(--success-color);
        animation: bounceIn 0.5s ease;
    }

    @keyframes spin {
        to { transform: rotate(360deg); }
    }

    @keyframes bounceIn {
        0% { 
            transform: scale(0.5); 
            opacity: 0;
        }
        60% { 
            transform: scale(1.2); 
            opacity: 1;
        }
        100% { 
            transform: scale(1); 
        }
    }

    @keyframes pulse {
        0% { box-shadow: 0 0 0 0 rgba(48, 209, 88, 0.4); }
        70% { box-shadow: 0 0 0 10px rgba(48, 209, 88, 0); }
        100% { box-shadow: 0 0 0 0 rgba(48, 209, 88, 0); }
    }

    .connection-success {
        position: relative;
    }

    .connection-success::after {
        content: '';
        position: absolute;
        top: -10px;
        left: -10px;
        right: -10px;
        bottom: -10px;
        border-radius: 50%;
        animation: pulse 1.5s infinite;
        pointer-events: none;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
        .header {
            flex-direction: column;
            align-items: center;
            gap: 15px;
        }
        
        .main {
            padding: 20px;
        }
        
        .tools-grid {
            grid-template-columns: 1fr;
        }
        
        h1 {
            font-size: 28px;
        }
        
        .subtitle {
            font-size: 16px;
        }

        .tool-buttons {
            flex-direction: column;
        }
    }

    @media (max-width: 480px) {
        .header {
            margin-bottom: 20px;
        }
        
        .main {
            padding: 15px;
            border-radius: 20px;
        }
        
        h1 {
            font-size: 24px;
        }
        
        .tool-card {
            padding: 20px;
        }

        .pagination {
            flex-wrap: wrap;
            gap: 10px;
        }
    }