body {
            font-family: 'Helvetica Neue', Arial, sans-serif;
            background-color: #2c3e50;
            color: #ecf0f1;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            text-align: center;
        }
        .container {
            max-width: 600px;
            padding: 2rem;
            background-color: #34495e;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
        }
        h1 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: #f1c40f;
        }
        p {
            font-size: 1.1rem;
            margin-bottom: 2rem;
            line-height: 1.6;
        }
        .signup-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: none;
            border-radius: 4px;
            font-size: 1rem;
            background-color: #2c3e50;
            color: #ecf0f1;
            font-family: inherit;
            box-sizing: border-box;
        }
        textarea {
            resize: vertical;
        }
        select {
            cursor: pointer;
            appearance: auto;
        }
        select option {
            background-color: #2c3e50;
            color: #ecf0f1;
        }
        input::placeholder, textarea::placeholder {
            color: #95a5a6;
        }
        button {
            padding: 0.8rem;
            background-color: #f1c40f;
            color: #2c3e50;
            border: none;
            border-radius: 4px;
            font-size: 1rem;
            cursor: pointer;
            font-weight: bold;
            transition: background-color 0.3s;
        }
        button:hover {
            background-color: #f39c12;
        }
        a {
            color: #f1c40f;
            text-decoration: none;
        }
        a:hover {
            text-decoration: underline;
        }
        .footer {
            margin-top: 1.5rem;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        .footer a {
            color: #f1c40f;
            text-decoration: none;
            font-weight: bold;
            transition: color 0.3s, text-decoration 0.3s;
        }
        .footer a:hover {
            color: #f39c12;
            text-decoration: underline;
        }
        .footer .disclaimer {
            margin-top: 0.8rem;
            font-size: 0.75rem;
            color: #7f8c8d;
            font-style: italic;
        }

        .rules-list {
            text-align: left;
            margin-bottom: 2rem;
        }
        .rule {
            margin-bottom: 1.5rem;
        }
        .rule h3 {
            color: #f1c40f;
            margin: 0 0 0.3rem 0;
            font-size: 1.1rem;
        }
        .rule p {
            margin: 0;
            font-size: 0.95rem;
        }

        /* Modal overlay */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.6);
            justify-content: center;
            align-items: center;
            z-index: 1000;
        }
        .modal-overlay.active {
            display: flex;
        }
        .modal {
            background-color: #34495e;
            padding: 2rem;
            border-radius: 8px;
            max-width: 450px;
            width: 90%;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
            text-align: center;
        }
        .modal h2 {
            color: #f1c40f;
            margin-top: 0;
        }
        .modal p {
            font-size: 1rem;
            margin-bottom: 1.5rem;
        }
        .modal-actions {
            display: flex;
            gap: 1rem;
            justify-content: center;
        }
        .modal-actions .btn-confirm {
            background-color: #e74c3c;
            color: #fff;
        }
        .modal-actions .btn-confirm:hover {
            background-color: #c0392b;
        }
        .modal-actions .btn-cancel {
            background-color: #95a5a6;
            color: #fff;
        }
        .modal-actions .btn-cancel:hover {
            background-color: #7f8c8d;
        }

        .modal .disclaimer {
            margin-top: 0.5rem;
            font-size: 0.8rem;
            color: #95a5a6;
            font-style: italic;
        }