body {
    background: linear-gradient(135deg, #1a2a4e 0%, #2a3a5e 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    padding: 40px;
    max-width: 400px;
    width: 100%;
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo h1 {
    color: #1a2a4e;
    margin: 0;
    font-size: 1.8em;
}

.logo p {
    color: #666;
    margin: 5px 0 0 0;
    font-size: 0.9em;
}

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

label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
}

input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #e1e1e1;
    border-radius: 6px;
    font-size: 16px;
    transition: border-color 0.3s;
    box-sizing: border-box;
}

input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: #1a2a4e;
}

.btn {
    width: 100%;
    padding: 12px;
    background: #1a2a4e;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.btn:hover {
    background: #2a3a5e;
}

.btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.toggle-mode {
    text-align: center;
    margin-top: 20px;
}

.toggle-mode a {
    color: #1a2a4e;
    text-decoration: none;
    font-weight: 600;
}

.toggle-mode a:hover {
    text-decoration: underline;
}

.separator {
    margin: 0 10px;
    color: #999;
}

.message {
    padding: 10px;
    border-radius: 6px;
    margin-bottom: 20px;
    text-align: center;
}

.message.info {
    background: #dbf2ff;
    color: #01579b;
    border: 1px solid #dbf2ff;
}

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

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

.hidden {
    display: none;
}

.loading {
    display: none;
    text-align: center;
    margin-top: 10px;
    color: #666;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }

    .login-container {
        padding: 30px 25px;
        max-width: 100%;
    }

    .logo h1 {
        font-size: 1.6em;
    }

    .logo p {
        font-size: 0.85em;
    }

    input[type="email"],
    input[type="password"] {
        font-size: 16px;
        /* Prevents zoom on iOS */
        padding: 14px;
    }

    .btn {
        padding: 14px;
        font-size: 16px;
    }

    .toggle-mode {
        font-size: 0.9em;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .login-container {
        padding: 25px 20px;
    }

    .logo h1 {
        font-size: 1.4em;
    }

    .form-group {
        margin-bottom: 18px;
    }

    label {
        font-size: 0.9em;
    }

    .toggle-mode {
        font-size: 0.85em;
        line-height: 1.4;
    }

    .separator {
        display: block;
        margin: 5px 0;
    }
}