/* 背景图片修复：铺满且不随内容滚动 */
.bg-layer {
    position: fixed;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: url('/background.jpg') center/cover no-repeat;
    filter: blur(2px);
    z-index: -1;
}

/* 容器布局：避开导航栏，垂直居中 */
.auth-container {
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    padding-top: 80px;
    box-sizing: border-box;
}

/* 卡片样式 */
.auth-card {
    background: var(--card-bg);
    /* 这里已经应用了新的高透明度变量 */
    width: 100%;
    max-width: 450px;
    padding: 40px 40px 36px;
    border-radius: 28px;
    box-shadow: 0 1px 3px var(--shadow-color), 0 10px 30px var(--shadow-color);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    transition: height 0.3s ease;
    overflow: hidden;
    position: relative;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    scrollbar-width: none;
}

.auth-card::-webkit-scrollbar {
    display: none;
}

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

.auth-header h2 {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-color);
}

.auth-header p {
    font-size: 16px;
    color: var(--text-secondary);
}

/* 步骤切换动画 */
.auth-step {
    display: none;
    animation: fadeIn 0.4s ease;
}

.auth-step.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 输入框样式 */
.input-group {
    position: relative;
    margin-bottom: 24px;
}

.input-group input {
    width: 100%;
    height: 56px;
    padding: 14px 16px 0;
    font-size: 16px;
    color: var(--text-color);
    background: transparent;
    /* 修改：默认边框颜色加深 (原先是 var(--border-color) 较浅) */
    border: 1px solid #80868b;
    border-radius: 4px;
    outline: none;
    transition: border 0.2s;
}

/* 深色模式下边框也不要太亮，但要清晰 */
[data-theme="dark"] .input-group input {
    border-color: #858585;
}

.input-group input:focus {
    border: 2px solid var(--primary-color);
    padding: 14px 15px 0;
}

.input-group label {
    position: absolute;
    left: 14px;
    top: 18px;
    color: var(--text-secondary);
    font-size: 16px;
    pointer-events: none;
    transition: 0.2s ease all;
    background: transparent;
    padding: 0 4px;
}

/* 输入框有值或聚焦时，标签上浮 */
.input-group input:focus~label,
.input-group input:not(:placeholder-shown)~label,
.input-group.filled label {
    /* 增加 filled 类支持手动触发 */
    top: -8px;
    left: 10px;
    font-size: 12px;
    color: var(--primary-color);
    background: var(--card-bg);
}

/* 按钮组 */
.actions-right {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.actions-left-right {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mt-4 {
    margin-top: 16px;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.btn-text {
    background: transparent;
    color: var(--primary-color);
    border: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    padding: 8px;
}

.btn-text:hover {
    background: rgba(26, 115, 232, 0.08);
    border-radius: 4px;
}

.btn-outlined {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    padding: 9px 23px;
    border-radius: 20px;
    font-size: 14px;
    cursor: pointer;
}

/* 第三方登录 & FontAwesome */
.divider {
    display: flex;
    align-items: center;
    margin: 30px 0 20px;
    color: var(--text-secondary);
    font-size: 13px;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.divider span {
    padding: 0 10px;
}

.social-login {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.social-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.social-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

.social-btn i {
    font-size: 22px;
    color: var(--text-color);
}

[data-theme="dark"] .social-btn i {
    color: #fff;
}

/* 品牌色 */
.social-btn i.fa-google {
    color: #DB4437 !important;
}

.social-btn i.fa-microsoft {
    color: #00A4EF !important;
}

/* 用户 Chip 样式 */
.user-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 6px 12px 6px 8px;
    margin: 0 auto 24px auto;
    cursor: pointer;
    max-width: 100%;
}

/* 密码页中 Chip 靠左或适应内容 */
#step-password .user-chip {
    display: flex;
    width: fit-content;
}

.user-chip .material-icons-round {
    font-size: 20px;
    margin-right: 8px;
    color: var(--text-secondary);
}

.user-chip span {
    font-size: 14px;
    color: var(--text-color);
    font-weight: 500;
}

.user-chip:hover {
    background-color: rgba(0, 0, 0, 0.05);
}