/* ============================================
   商品月份选择弹出层组件样式 (TASK004)
   匹配全局UI设计，从下往上过渡动画
   ============================================ */

/* 使用全局和组件变量，确保与整体设计一致 */
:root {
    --month-modal-z-index: 1050;
    --month-modal-overlay-bg: rgba(0, 0, 0, 0.5);
    --month-modal-bg: var(--global-bg-tertiary, var(--bs-body-tertiary-bg, #f5f5f5));
    --month-modal-text: var(--global-text-body, var(--bs-body-color, #374151));
    --month-modal-text-secondary: var(--global-text-secondary, var(--bs-secondary-color, #6b7280));
    --month-modal-text-emphasis: var(--global-text-emphasis, var(--bs-emphasis-color, #1f2937));
    --month-modal-border: var(--global-border-color, var(--bs-border-color, #e5e7eb));
    --month-modal-border-radius: var(--global-border-radius, 1.5rem);
    --month-modal-border-radius-sm: var(--global-border-radius-sm, 0.75rem);
    --month-modal-shadow: 0 10px 25px rgba(0, 0, 0, 0.15), 0 4px 10px rgba(0, 0, 0, 0.1);
    --month-modal-primary: var(--component-primary, #4b5563);
    --month-modal-primary-hover: var(--component-primary-hover, #374151);
    --month-modal-danger: var(--component-danger, #ef4444);
    --month-modal-success: var(--component-success, #10b981);
}

[data-bs-theme="dark"] {
    --month-modal-overlay-bg: rgba(0, 0, 0, 0.7);
    --month-modal-bg: var(--global-bg-tertiary, var(--bs-body-tertiary-bg, #1f2937));
    --month-modal-text: var(--global-text-body, var(--bs-body-color, #d1d5db));
    --month-modal-text-secondary: var(--global-text-secondary, var(--bs-secondary-color, #9ca3af));
    --month-modal-text-emphasis: var(--global-text-emphasis, var(--bs-emphasis-color, #e5e7eb));
    --month-modal-border: var(--global-border-color, var(--bs-border-color, #374151));
    --month-modal-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), 0 4px 10px rgba(0, 0, 0, 0.3);
}

/* ============================================
   弹出层容器
   ============================================ */

.product-month-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--month-modal-z-index);
    display: none;
    align-items: flex-end;
    justify-content: center;
    padding: 0;
    pointer-events: none;
    overflow: hidden;
}

/* 显示状态 */
.product-month-modal.show {
    display: flex;
    pointer-events: auto;
}

/* 遮罩层 */
.product-month-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--month-modal-overlay-bg);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.product-month-modal.show .product-month-modal-overlay {
    opacity: 1;
}

/* ============================================
   弹出层内容（从下往上动画）
   ============================================ */

.product-month-modal-content {
    position: relative;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    background: var(--month-modal-bg);
    border-radius: var(--month-modal-border-radius) var(--month-modal-border-radius) 0 0;
    box-shadow: var(--month-modal-shadow);
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    z-index: 1;
}

/* 显示动画：从下往上滑入 */
.product-month-modal.show .product-month-modal-content {
    transform: translateY(0);
}

/* ============================================
   头部
   ============================================ */

.product-month-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--month-modal-border);
    flex-shrink: 0;
}

.product-month-modal-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--month-modal-text-emphasis);
    line-height: 1.3;
}

.product-month-modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--month-modal-border-radius-sm);
    color: var(--month-modal-text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.product-month-modal-close:hover {
    background: var(--month-modal-border);
    color: var(--month-modal-text-emphasis);
}

.product-month-modal-close:active {
    transform: scale(0.95);
}

.product-month-modal-close svg {
    width: 1.5rem;
    height: 1.5rem;
}

/* ============================================
   主体内容
   ============================================ */

.product-month-modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

/* 商品信息 */
.product-month-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--month-modal-border);
}

.product-month-image-wrapper {
    width: 120px;
    height: 120px;
    margin-bottom: 1rem;
    border-radius: var(--month-modal-border-radius-sm);
    overflow: hidden;
    background: var(--bs-body-bg, #ffffff);
    border: 1px solid var(--month-modal-border);
    display: flex;
    align-items: center;
    justify-content: center;
}

[data-bs-theme="dark"] .product-month-image-wrapper {
    background: var(--bs-body-bg, #111827);
}

.product-month-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.product-month-name {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--month-modal-text-emphasis);
    line-height: 1.4;
}

/* ============================================
   月份选项列表
   ============================================ */

.product-month-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

/* 月份选项按钮 */
.month-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.25rem 1rem;
    background: var(--bs-body-bg, #ffffff);
    border: 2px solid var(--month-modal-border);
    border-radius: var(--month-modal-border-radius-sm);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    position: relative;
    overflow: hidden;
}

[data-bs-theme="dark"] .month-option {
    background: var(--bs-body-bg, #111827);
}

.month-option:hover:not(.active) {
    border-color: var(--month-modal-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

[data-bs-theme="dark"] .month-option:hover:not(.active) {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* 选中状态 */
.month-option.active {
    border-color: var(--month-modal-primary);
    background: var(--month-modal-primary);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(75, 85, 99, 0.3);
}

[data-bs-theme="dark"] .month-option.active {
    background: var(--month-modal-primary);
    box-shadow: 0 4px 12px rgba(75, 85, 99, 0.5);
}

.month-option.active .month-label,
.month-option.active .month-price {
    color: #ffffff;
}

/* 月份标签 */
.month-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--month-modal-text-emphasis);
    margin-bottom: 0.5rem;
    transition: color 0.2s ease;
}

/* 月份价格 */
.month-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--month-modal-danger);
    transition: color 0.2s ease;
}

.month-option.active .month-price {
    color: #ffffff;
}

/* ============================================
   底部按钮
   ============================================ */

.product-month-modal-footer {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    border-top: 1px solid var(--month-modal-border);
    flex-shrink: 0;
}

.product-month-btn-cancel,
.product-month-btn-confirm {
    flex: 1;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--month-modal-border-radius-sm);
    transition: all 0.2s ease;
    text-align: center;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-month-btn-cancel {
    background: transparent;
    border: 2px solid var(--month-modal-border);
    color: var(--month-modal-text);
}

.product-month-btn-cancel:hover {
    background: var(--month-modal-border);
    color: var(--month-modal-text-emphasis);
}

.product-month-btn-confirm {
    background: var(--month-modal-primary);
    border: 2px solid var(--month-modal-primary);
    color: #ffffff;
}

.product-month-btn-confirm:hover {
    background: var(--month-modal-primary-hover);
    border-color: var(--month-modal-primary-hover);
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(75, 85, 99, 0.3);
}

.product-month-btn-confirm:active {
    transform: translateY(0);
}

/* ============================================
   响应式设计
   ============================================ */

/* 平板和桌面端 */
@media (min-width: 576px) {
    .product-month-modal {
        align-items: center;
        padding: 1rem;
    }
    
    .product-month-modal-content {
        max-width: 500px;
        max-height: 85vh;
        border-radius: var(--month-modal-border-radius);
        transform: translateY(50px) scale(0.95);
        opacity: 0;
    }
    
    .product-month-modal.show .product-month-modal-content {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    
    .product-month-options {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}

/* 桌面端 */
@media (min-width: 768px) {
    .product-month-modal-content {
        max-width: 600px;
    }
    
    .product-month-options {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
}

/* 移动端优化 */
@media (max-width: 575.98px) {
    .product-month-modal-header {
        padding: 1.25rem 1rem;
    }
    
    .product-month-modal-title {
        font-size: 1.25rem;
    }
    
    .product-month-modal-body {
        padding: 1.25rem 1rem;
    }
    
    .product-month-info {
        margin-bottom: 1.5rem;
        padding-bottom: 1.25rem;
    }
    
    .product-month-image-wrapper {
        width: 100px;
        height: 100px;
    }
    
    .product-month-name {
        font-size: 1.125rem;
    }
    
    .product-month-options {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    
    .month-option {
        padding: 1rem 0.75rem;
    }
    
    .month-label {
        font-size: 0.9375rem;
    }
    
    .month-price {
        font-size: 1.125rem;
    }
    
    .product-month-modal-footer {
        padding: 1.25rem 1rem;
        flex-direction: column;
    }
    
    .product-month-btn-cancel,
    .product-month-btn-confirm {
        width: 100%;
    }
}

/* ============================================
   无障碍访问
   ============================================ */

.product-month-modal[aria-hidden="true"] {
    display: none;
}

.product-month-modal[aria-hidden="false"] {
    display: flex;
}

/* 焦点管理 */
.product-month-modal-close:focus,
.month-option:focus,
.product-month-btn-cancel:focus,
.product-month-btn-confirm:focus {
    outline: 2px solid var(--month-modal-primary);
    outline-offset: 2px;
}

/* 键盘导航优化 */
.month-option {
    outline: none;
}

.month-option:focus-visible {
    outline: 2px solid var(--month-modal-primary);
    outline-offset: 2px;
}