/* ===== 认证模态框组件样式 ===== */
/* 职责：仅负责认证模态框的视觉样式 */

/* === 1. 模态框容器 === */
.auth-modal-component {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: var(--z-index-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn var(--transition-normal);
}

/* === 2. 遮罩层 === */
.auth-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    opacity: 0;
    animation: fadeIn var(--transition-normal) forwards;
}

/* === 3. 模态框主体 === */
.auth-modal-container {
    position: relative;
    width: 90%;
    max-width: var(--auth-modal-width);
    max-height: 90vh;
    background: var(--bg-primary);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    animation: slideIn var(--transition-normal) forwards;
    
    /* 响应式设计 */
    @media (max-width: 480px) {
        width: 95%;
        max-width: none;
        margin: var(--spacing-sm);
    }
}

/* === 4. 关闭按钮 === */
.auth-modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    border-radius: var(--border-radius-md);
    transition: var(--transition-fast);
    z-index: 1;
}

.auth-modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.auth-modal-close svg {
    width: 20px;
    height: 20px;
}

/* === 5. 表单容器 === */
.auth-form-container {
    padding: var(--spacing-xl);
    overflow-y: auto;
    max-height: calc(90vh - 80px);
}

/* === 6. 表单标题 === */
.auth-form-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-form-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

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

/* === 7. 表单组 === */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 69, 0, 0.1);
}

.form-input:invalid {
    border-color: var(--error-color);
}

/* === 8. 密码输入框包装器 === */
.password-input-wrapper {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    padding: var(--spacing-xs);
    color: var(--text-secondary);
    border: none;
    background: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.password-toggle:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* === 9. 表单选项 === */
.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.form-checkbox {
    width: 16px;
    height: 16px;
    margin: 0;
    margin-right: var(--spacing-xs);
    cursor: pointer;
}

.checkbox-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.forgot-password-link {
    font-size: var(--font-size-sm);
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

.forgot-password-link:hover {
    text-decoration: underline;
}

.agreement-link,
.privacy-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

.agreement-link:hover,
.privacy-link:hover {
    text-decoration: underline;
}

/* === 10. 提交按钮 === */
.auth-submit-btn {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.auth-submit-btn:hover {
    background: var(--primary-color-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.auth-submit-btn:active {
    transform: translateY(0);
}

.auth-submit-btn:disabled {
    background: var(--disabled-color);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.spinner {
    animation: spin 1s linear infinite;
    color: white;
}

/* === 11. 登录/注册切换 === */
.auth-switch {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.auth-switch-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.auth-switch-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    text-decoration: underline;
    transition: var(--transition-fast);
}

.auth-switch-btn:hover {
    color: var(--primary-color-hover);
}

/* === 12. 表单显示状态 === */
.auth-form {
    transition: var(--transition-normal);
}

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

/* === 13. 动画定义 === */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* === 14. 错误和成功状态 === */
.form-error {
    border-color: var(--error-color);
}

.error-message {
    color: var(--error-color);
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.error-message::before {
    content: "⚠";
    font-size: var(--font-size-sm);
}

.success-message {
    color: var(--success-color);
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.success-message::before {
    content: "✓";
    font-size: var(--font-size-sm);
}



/* === 16. 响应式设计 === */
@media (max-width: 480px) {
    .auth-form-container {
        padding: var(--spacing-lg);
    }
    
    .auth-switch {
        padding: var(--spacing-md) var(--spacing-lg);
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .auth-modal-close {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        width: 28px;
        height: 28px;
    }
}

/* === 17. 可访问性增强 === */
@media (prefers-reduced-motion: reduce) {
    .auth-modal-component,
    .auth-modal-overlay,
    .auth-modal-container {
        animation: none;
    }
    
    .auth-submit-btn:hover {
        transform: none;
    }
}