/* 全局重置 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    
    /* 页面未加载图片时的背景底色 */
    background-color: #2c3e50; 
    background-image: url('ap.avif');
    background-size: cover;
    background-position: center;
    background-attachment: fixed; /* 视差效果 */
}

/* 毛玻璃容器 */
.glass-panel {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.3);
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    animation: slideUpFade 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideUpFade {
    0% { opacity: 0; transform: translateY(30px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* 标题区域 */
.header {
    text-align: center;
    margin-bottom: 30px;
    color: #ffffff;
}

.header h2 {
    font-weight: 600;
    font-size: 24px;
    letter-spacing: 1px;
    margin-bottom: 8px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.header p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

/* 表单元素 */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 8px;
    font-weight: 500;
}

input[type="text"] {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: #ffffff;
    font-size: 14px;
    outline: none;
    transition: all 0.3s ease;
}

input[type="text"]::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

input[type="text"]:focus {
    background: rgba(255, 255, 255, 0.1);
    border-color: #4da8da;
    box-shadow: 0 0 0 3px rgba(77, 168, 218, 0.3);
}

/* 按钮,加载动画 */
.primary-btn {
    width: 100%;
    padding: 14px;
    background: #4da8da;
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.1s;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 12px rgba(77, 168, 218, 0.3);
}

.primary-btn:hover {
    background: #3e91c1;
    transform: translateY(-1px);
}

.primary-btn:active {
    transform: scale(0.98);
}

.primary-btn:disabled {
    background: #8aa6b5;
    cursor: not-allowed;
    box-shadow: none;
}

.spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top: 2px solid #fff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 消息提示框 */
.message-box {
    margin-top: 16px;
    padding: 12px;
    border-radius: 8px;
    font-size: 13px;
    text-align: center;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    display: none;
}

.message-box.show {
    opacity: 1;
    transform: translateY(0);
    display: block;
}

.message-box.success {
    background: rgba(46, 204, 113, 0.2);
    color: #2ecc71;
    border: 1px solid rgba(46, 204, 113, 0.3);
}

.message-box.error {
    background: rgba(231, 76, 60, 0.2);
    color: #ff6b6b;
    border: 1px solid rgba(231, 76, 60, 0.3);
}