* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    /* 深色紫蓝渐变背景 */
    background: linear-gradient(135deg, #10002b 0%, #240046 50%, #3c096c 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.auth-container {
    width: 100%;
    max-width: 450px;
    /* 毛玻璃核心属性 */
    background-color: rgba(255, 255, 255, 0.07);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

.auth-header {
    background: linear-gradient(to right, #4776e6, #8e54e9);
    color: white;
    padding: 25px 20px;
    text-align: center;
}

.auth-header h1 {
    font-size: 28px;
    margin-bottom: 10px;
}

.auth-header p {
    opacity: 0.9;
    font-size: 16px;
}

.form-container {
    padding: 30px;
}

.form-container h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #ffffff;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #e2e2e2;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    /* 深色输入框适配毛玻璃 */
    background: rgba(255, 255, 255, 0.06);
    border: 2px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    font-size: 16px;
    color: #fff;
    transition: border 0.3s, background 0.3s;
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.form-group input:focus {
    border-color: #8e54e9;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
}

.auth-btn {
    display: block;
    width: 100%;
    padding: 14px;
    background: linear-gradient(to right, #4776e6, #8e54e9);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, opacity 0.2s;
}

.auth-btn:hover {
    transform: translateY(-2px);
    opacity: 0.95;
}

.toggle-form {
    text-align: center;
    margin-top: 20px;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
}

.toggle-form a {
    color: #a888ff;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
}

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

.message {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    display: none;
}

.success {
    background-color: rgba(76, 175, 80, 0.18);
    color: #96ff9b;
    border: 1px solid rgba(76, 175, 80, 0.35);
}

.error {
    background-color: rgba(244, 67, 54, 0.18);
    color: #ffb3b3;
    border: 1px solid rgba(244, 67, 54, 0.35);
}

.back-home {
    text-align: center;
    margin-top: 20px;
}

.back-home a {
    color: #a888ff;
    text-decoration: none;
    font-weight: 600;
}

.back-home a:hover {
    text-decoration: underline;
}

@media (max-width: 480px) {
    .auth-container {
        border-radius: 10px;
    }
    
    .form-container {
        padding: 20px;
    }
}