* {
        box-sizing: border-box;
    }

    body {
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        margin: 0;
        padding: 20px;
        background: #f0f2f5;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
    }

    header {
        background: white;
        padding: 20px;
        border-radius: 10px;
        margin-bottom: 20px;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    h1 {
        margin: 0;
        color: #1e3c72;
        font-size: 24px;
    }

    .badge {
        background: #4CAF50;
        color: white;
        padding: 5px 15px;
        border-radius: 20px;
        font-size: 14px;
    }

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

    .card {
        background: white;
        border-radius: 10px;
        padding: 20px;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }

    .card h2 {
        margin-top: 0;
        color: #1e3c72;
        font-size: 18px;
        border-bottom: 2px solid #e0e0e0;
        padding-bottom: 10px;
    }

    .status-box {
        background: #f8f9fa;
        border-left: 4px solid #4CAF50;
        padding: 15px;
        border-radius: 5px;
        margin-bottom: 20px;
    }

    .status-box h3 {
        margin: 0 0 10px 0;
        color: #1e3c72;
    }

    .message {
        padding: 15px;
        border-radius: 5px;
        margin-bottom: 20px;
    }

    .success {
        background: #d4edda;
        color: #155724;
        border: 1px solid #c3e6cb;
    }

    .error {
        background: #f8d7da;
        color: #721c24;
        border: 1px solid #f5c6cb;
    }

    .form-group {
        margin-bottom: 15px;
    }

    label {
        display: block;
        margin-bottom: 5px;
        color: #495057;
        font-weight: 600;
        font-size: 14px;
    }

    input,
    select,
    textarea {
        width: 100%;
        padding: 8px 12px;
        border: 1px solid #ced4da;
        border-radius: 4px;
        font-size: 14px;
    }

    input:focus,
    select:focus {
        border-color: #4CAF50;
        outline: none;
        box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2);
    }

    button {
        background: #4CAF50;
        color: white;
        border: none;
        padding: 10px 20px;
        border-radius: 5px;
        cursor: pointer;
        font-size: 14px;
        font-weight: 600;
        transition: background 0.3s;
    }

    button:hover {
        background: #45a049;
    }

    button.secondary {
        background: #6c757d;
    }

    button.secondary:hover {
        background: #5a6268;
    }

    pre {
        background: #f8f9fa;
        padding: 15px;
        border-radius: 5px;
        overflow: auto;
        font-size: 12px;
        border: 1px solid #e0e0e0;
        margin: 10px 0 0 0;
    }

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

    .footer {
        text-align: center;
        margin-top: 20px;
        color: #6c757d;
        font-size: 12px;
    }

    .nav-tabs {
        display: flex;
        gap: 10px;
        margin-bottom: 20px;
        border-bottom: 2px solid #e0e0e0;
        padding-bottom: 10px;
    }

    .tab-btn {
        background: none;
        border: none;
        padding: 10px 20px;
        cursor: pointer;
        font-size: 16px;
        color: #6c757d;
    }

    .tab-btn.active {
        color: #4CAF50;
        border-bottom: 2px solid #4CAF50;
    }

    .tab-content {
        display: none;
    }

    .tab-content.active {
        display: block;
    }