body {
        margin: 0;
        font-family: "Segoe UI", Roboto, Arial, sans-serif;
        background: linear-gradient(135deg, #1e2a38, #243447);
        display: flex;
        align-items: center;
        justify-content: center;
        height: 100vh;
        color: #333;
    }

    .login-container {
        background: #ffffff;
        width: 360px;
        border-radius: 8px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        padding: 40px 30px;
        text-align: center;
    }

    .logo {
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 5px;
        color: #2c3e50;
    }

    .subtitle {
        font-size: 13px;
        color: #888;
        margin-bottom: 30px;
    }

    input {
        width: 100%;
        padding: 10px 12px;
        margin-bottom: 15px;
        border: 1px solid #dcdcdc;
        border-radius: 4px;
        font-size: 14px;
        box-sizing: border-box;
    }

    button {
        width: 100%;
        padding: 10px;
        background: #2d8cf0;
        border: none;
        border-radius: 4px;
        color: white;
        font-size: 14px;
        cursor: pointer;
        transition: background 0.2s ease;
    }

    button:hover {
        background: #1f6fd1;
    }

    button:disabled {
        background: #7aaee6;
        cursor: not-allowed;
    }

    .status-message {
        display: none;
        margin-top: 15px;
        font-size: 13px;
    }

    .status-message.loading {
        color: #666;
    }

    .status-message.error {
        color: #c0392b;
        font-weight: 500;
    }

    .footer {
        margin-top: 20px;
        font-size: 11px;
        color: #aaa;
    }

    .version {
        margin-top: 10px;
        font-size: 11px;
        color: #bbb;
    }