/* 食养指南 - 移动端优先应用壳 */
:root {
    --diet-primary: #1a6dcc;
    --diet-primary-dark: #0d4d9c;
    --diet-bg: #f0f7ff;
    --diet-surface: #ffffff;
    --diet-border: #d1e3ff;
    --diet-text-muted: #64748b;
    --diet-bottom-nav-h: 64px;
    --diet-wizard-nav-h: 60px;
    --diet-sticky-h: 52px;
    --diet-safe-bottom: env(safe-area-inset-bottom, 0px);
}

/* 饮食页：确保悬浮加号可见 */
@media (max-width: 900px) {
    body.diet-page #floating-menu,
    body:has(#diet-app) #floating-menu {
        display: block !important;
    }

    #floating-menu.floating-menu-draggable {
        touch-action: none;
    }

    #floating-menu.floating-menu-draggable.is-dragging #floating-menu-toggle {
        transform: scale(1.05);
    }

    body.diet-page #floating-menu-toggle,
    body:has(#diet-app) #floating-menu-toggle {
        width: 46px;
        height: 46px;
        box-shadow: 0 2px 12px rgba(0, 82, 155, 0.25);
    }
}

.diet-app {
    position: relative;
    min-height: 60vh;
}

.diet-app-shell {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* 顶栏：当前模块 + 步骤 */
.diet-app-topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    background: var(--diet-surface);
    border-bottom: 1px solid var(--diet-border);
    box-shadow: 0 2px 12px rgba(26, 109, 204, 0.06);
}

.diet-app-topbar-inner {
    padding: 12px 16px 10px;
}

.diet-app-module-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #1e293b;
    margin: 0 0 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.diet-app-module-title i {
    color: var(--diet-primary);
}

/* 主流程步骤条 */
.diet-flow-steps {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 2px;
}

.diet-flow-steps::-webkit-scrollbar {
    display: none;
}

.diet-flow-step {
    flex: 1 0 auto;
    min-width: 72px;
    max-width: 100px;
    padding: 8px 6px;
    border: none;
    background: var(--diet-bg);
    border-radius: 10px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--diet-text-muted);
    cursor: pointer;
    text-align: center;
    line-height: 1.25;
    transition: all 0.2s;
    min-height: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.diet-flow-step i {
    font-size: 1rem;
}

.diet-flow-step.active {
    background: var(--diet-primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(26, 109, 204, 0.25);
}

.diet-flow-step.done:not(.active) {
    background: #e8f4fd;
    color: var(--diet-primary);
}

/* 营养摘要条 */
.diet-summary-strip {
    display: none;
    padding: 8px 16px;
    background: linear-gradient(90deg, #e8f4fd, #f0f7ff);
    border-bottom: 1px solid var(--diet-border);
    gap: 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.diet-summary-strip.visible {
    display: flex;
}

.diet-summary-strip::-webkit-scrollbar {
    display: none;
}

.diet-summary-chip {
    flex-shrink: 0;
    padding: 6px 12px;
    background: #fff;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    color: #334155;
    border: 1px solid var(--diet-border);
    white-space: nowrap;
}

.diet-summary-chip strong {
    color: var(--diet-primary);
}

/* 桌面端侧栏 + 内容 */
.diet-app-layout {
    display: block;
}

.diet-desktop-nav {
    display: none;
}

.diet-app-main {
    padding: 16px;
    padding-bottom: calc(var(--diet-bottom-nav-h) + var(--diet-safe-bottom) + 24px);
}

@media (min-width: 901px) {
    .diet-app-layout {
        display: grid;
        grid-template-columns: 220px 1fr;
        gap: 0;
        align-items: start;
    }

    .diet-desktop-nav {
        display: block;
        position: sticky;
        top: 0;
        max-height: calc(100vh - 80px);
        overflow-y: auto;
        padding: 16px 0;
        border-right: 1px solid var(--diet-border);
        background: #fafcff;
    }

    .diet-desktop-nav-group {
        margin-bottom: 16px;
    }

    .diet-desktop-nav-label {
        font-size: 0.7rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        color: var(--diet-text-muted);
        padding: 0 16px 8px;
    }

    .diet-nav-item {
        display: flex;
        align-items: center;
        gap: 10px;
        width: 100%;
        padding: 12px 16px;
        border: none;
        background: none;
        text-align: left;
        font-size: 0.9rem;
        font-weight: 600;
        color: #475569;
        cursor: pointer;
        border-left: 3px solid transparent;
        transition: all 0.15s;
        min-height: 44px;
    }

    .diet-nav-item:hover {
        background: var(--diet-bg);
        color: var(--diet-primary);
    }

    .diet-nav-item.active {
        background: #e8f4fd;
        color: var(--diet-primary);
        border-left-color: var(--diet-primary);
    }

    .diet-nav-item i {
        width: 18px;
        text-align: center;
    }

    .diet-bottom-nav {
        display: none !important;
    }

    .diet-app-main {
        padding: 24px 28px 32px;
    }

    .diet-flow-steps {
        display: none;
    }

    .nav-tabs-legacy {
        display: none !important;
    }
}

/* 隐藏旧版顶部横滑标签（移动端用底部导航替代） */
@media (max-width: 900px) {
    .nav-tabs-legacy {
        display: none !important;
    }
}

/* 底部导航 */
.diet-bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 50;
    display: flex;
    background: var(--diet-surface);
    border-top: 1px solid var(--diet-border);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.06);
    padding-bottom: var(--diet-safe-bottom);
    height: calc(var(--diet-bottom-nav-h) + var(--diet-safe-bottom));
}

.diet-bottom-nav-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    border: none;
    background: none;
    color: var(--diet-text-muted);
    font-size: 0.65rem;
    font-weight: 600;
    cursor: pointer;
    padding: 6px 4px;
    min-height: var(--diet-bottom-nav-h);
    transition: color 0.15s;
}

.diet-bottom-nav-btn i {
    font-size: 1.15rem;
}

.diet-bottom-nav-btn.active {
    color: var(--diet-primary);
}

/* 更多菜单 - 底部抽屉 */
.diet-sheet-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    z-index: 60;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s, visibility 0.25s;
}

.diet-sheet-backdrop.open {
    opacity: 1;
    visibility: visible;
}

.diet-sheet {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 61;
    background: var(--diet-surface);
    border-radius: 16px 16px 0 0;
    padding: 12px 16px calc(16px + var(--diet-safe-bottom));
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
    max-height: 70vh;
    overflow-y: auto;
}

.diet-sheet.open {
    transform: translateY(0);
}

.diet-sheet-handle {
    width: 40px;
    height: 4px;
    background: #cbd5e1;
    border-radius: 2px;
    margin: 0 auto 16px;
}

.diet-sheet-title {
    font-size: 1rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 12px;
}

.diet-sheet-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.diet-sheet-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px;
    background: var(--diet-bg);
    border: 1px solid var(--diet-border);
    border-radius: 12px;
    font-size: 0.88rem;
    font-weight: 600;
    color: #334155;
    cursor: pointer;
    min-height: 52px;
    text-align: left;
}

.diet-sheet-item i {
    color: var(--diet-primary);
    font-size: 1.1rem;
    width: 22px;
}

/* AI 食谱：偏好工具栏与弹窗 */
.recipe-actions-row {
    margin-top: 15px;
}

.recipes-preferences-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.recipe-generate-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.recipe-regenerate-btn,
.recipe-weekly-btn {
    background-color: #27ae60;
    color: #fff;
}

@media (min-width: 901px) {
    .recipe-actions-row {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 10px;
    }

    .recipe-actions-row .recipes-preferences-bar,
    .recipe-actions-row .recipe-generate-btns {
        display: contents;
    }

    .recipe-actions-row .recipes-preferences-bar {
        margin-bottom: 0;
    }

    .recipe-actions-row .btn {
        width: auto;
        flex: 0 0 auto;
    }

    .recipe-actions-row .preferences-status-text {
        margin-right: 4px;
    }
}

.preferences-status-text {
    font-size: 0.88rem;
    color: #94a3b8;
}

.preferences-status-text.preferences-status-set {
    color: #16a34a;
    font-weight: 500;
}

.diet-modal {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
}

.diet-modal.open {
    pointer-events: auto;
    opacity: 1;
}

.diet-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
}

.diet-modal-dialog {
    position: relative;
    width: 100%;
    max-width: 520px;
    max-height: min(88vh, 720px);
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.18);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.diet-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid #f1f5f9;
    flex-shrink: 0;
}

.diet-modal-header h3 {
    margin: 0;
    font-size: 1.05rem;
    color: #1e293b;
    display: flex;
    align-items: center;
    gap: 8px;
}

.diet-modal-header h3 i {
    color: var(--diet-primary);
}

.diet-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    color: #94a3b8;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
}

.diet-modal-close:hover {
    color: #64748b;
    background: #f1f5f9;
}

.diet-modal-body {
    padding: 16px 18px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.diet-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 12px 18px;
    border-top: 1px solid #f1f5f9;
    flex-shrink: 0;
    background: #fafbfc;
}

.preferences-modal-tip {
    margin: 0 0 14px;
    font-size: 0.88rem;
    color: #64748b;
    line-height: 1.5;
}

.preferences-form-block {
    background: #f8fafc;
    border-radius: 8px;
    padding: 12px 14px;
    margin-bottom: 12px;
}

.preferences-form-block h4 {
    margin: 0 0 10px;
    font-size: 0.92rem;
    color: var(--diet-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.preferences-form-block .input-group {
    margin-bottom: 10px;
}

.preferences-form-block .input-group:last-child {
    margin-bottom: 0;
}

.preferences-form-block label {
    display: block;
    font-size: 0.84rem;
    color: #475569;
    margin-bottom: 4px;
}

.preferences-form-block input[type="text"] {
    width: 100%;
    padding: 9px 10px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.9rem;
    box-sizing: border-box;
}

.preferences-check-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
}

.preferences-check-row label {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.88rem;
    color: #334155;
    cursor: pointer;
    white-space: nowrap;
}

@media (max-width: 600px) {
    .diet-modal {
        align-items: flex-end;
        padding: 0;
    }

    .diet-modal-dialog {
        max-width: none;
        max-height: 92vh;
        border-radius: 16px 16px 0 0;
    }
}

/* Tab 内容区 */
.diet-app-main .tab-content {
    display: none;
    padding: 0;
    animation: dietFadeIn 0.25s ease;
}

.diet-app-main .tab-content.active {
    display: block;
}

@keyframes dietFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.diet-app-main .section-title {
    font-size: 1.25rem;
    margin-bottom: 16px;
}

/* 表单分步向导 */
.diet-form-wizard {
    margin-bottom: 8px;
}

.diet-wizard-progress {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.diet-wizard-dot {
    flex: 1;
    height: 4px;
    border-radius: 2px;
    background: #e2e8f0;
    transition: background 0.2s;
}

.diet-wizard-dot.active,
.diet-wizard-dot.done {
    background: var(--diet-primary);
}

.diet-wizard-panel {
    display: none;
}

.diet-wizard-panel.active {
    display: block;
}

.diet-wizard-nav {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    position: sticky;
    bottom: calc(var(--diet-bottom-nav-h) + var(--diet-safe-bottom) + 8px);
    background: linear-gradient(transparent, #fff 20%);
    padding-top: 16px;
    z-index: 5;
}

.diet-wizard-nav .btn {
    flex: 1;
    justify-content: center;
    min-height: 44px;
}

@media (min-width: 901px) {
    .diet-wizard-panel {
        display: block !important;
    }

    .diet-wizard-progress,
    .diet-wizard-nav {
        display: none;
    }

    .diet-wizard-panel + .diet-wizard-panel {
        margin-top: 0;
        padding-top: 0;
        border-top: none;
    }
}

/* 芯片选择器（替代部分下拉） */
.diet-chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 6px;
}

.diet-chip {
    padding: 10px 16px;
    min-height: 44px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    background: #fff;
    font-size: 0.9rem;
    font-weight: 600;
    color: #475569;
    cursor: pointer;
    transition: all 0.15s;
    flex: 1 1 calc(50% - 4px);
    min-width: calc(50% - 4px);
    text-align: center;
}

.diet-chip.selected {
    border-color: var(--diet-primary);
    background: #e8f4fd;
    color: var(--diet-primary);
}

.diet-chip:disabled,
.diet-chip.diet-chip-disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

.diet-chip-compact {
    flex: 0 1 auto;
    min-width: 56px;
}

.diet-field-native-select {
    margin-top: 8px;
}

.diet-field-native-select select {
    width: 100%;
}

@media (min-width: 901px) {
    .diet-chip-group-mobile-only {
        display: none;
    }
}

@media (max-width: 900px) {
    .diet-field-native-select-desktop-only {
        display: none;
    }
}

/* 折叠卡片 */
.diet-collapse {
    border: 1px solid var(--diet-border);
    border-radius: 12px;
    margin-bottom: 12px;
    overflow: hidden;
    background: #fff;
}

.diet-collapse-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border: none;
    background: #fafcff;
    font-size: 0.95rem;
    font-weight: 700;
    color: #1e293b;
    cursor: pointer;
    min-height: 48px;
    text-align: left;
}

.diet-collapse-header i.chevron {
    transition: transform 0.2s;
    color: var(--diet-text-muted);
}

.diet-collapse.open .diet-collapse-header i.chevron {
    transform: rotate(180deg);
}

.diet-collapse-body {
    display: none;
    padding: 0 16px 16px;
}

.diet-collapse.open .diet-collapse-body {
    display: block;
}

/* 快捷操作 FAB（计算完成后） */
.diet-fab-next {
    display: none;
    position: fixed;
    right: 16px;
    bottom: calc(var(--diet-bottom-nav-h) + var(--diet-safe-bottom) + 16px);
    z-index: 45;
    padding: 12px 18px;
    background: var(--diet-primary);
    color: #fff;
    border: none;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 700;
    box-shadow: 0 6px 20px rgba(26, 109, 204, 0.35);
    cursor: pointer;
    align-items: center;
    gap: 8px;
}

.diet-fab-next.visible {
    display: inline-flex;
}

@media (max-width: 900px) {
    .diet-fab-next.visible {
        left: 12px;
        right: 12px;
        width: auto;
        justify-content: center;
        bottom: calc(var(--diet-bottom-nav-h) + var(--diet-safe-bottom) + 12px);
        z-index: 45;
        font-size: 0.82rem;
        padding: 10px 14px;
    }

    .diet-scroll-top {
        display: none !important;
    }

    /* 上一步/下一步：固定贴底，在底部导航上方 */
    .diet-wizard-nav {
        position: fixed;
        left: 0;
        right: 0;
        bottom: calc(var(--diet-bottom-nav-h) + var(--diet-safe-bottom));
        margin-top: 0;
        padding: 8px 16px;
        flex-direction: row;
        gap: 10px;
        background: rgba(255, 255, 255, 0.97);
        border-top: 1px solid var(--diet-border);
        box-shadow: 0 -4px 16px rgba(15, 23, 42, 0.08);
        z-index: 42;
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
    }

    .diet-wizard-nav .btn {
        width: auto;
        flex: 1;
        min-height: 44px;
    }

    /* 患者信息页：收紧底部留白，避免与固定向导栏重复占位 */
    #input .diet-wizard-nav {
        margin-top: 0 !important;
        padding-top: 8px !important;
    }

    body.diet-page:has(#input.active) .diet-app-main,
    body:has(#diet-app #input.active) .diet-app-main {
        padding-bottom: calc(var(--diet-wizard-nav-h) + var(--diet-bottom-nav-h) + var(--diet-safe-bottom)) !important;
    }

    body.diet-page:has(#input.active) .diet-app,
    body:has(#diet-app #input.active) .diet-app {
        min-height: auto;
    }

    #input .diet-form-wizard {
        padding-bottom: 0;
        margin-bottom: 0;
    }

    #input .diet-wizard-progress {
        margin-bottom: 14px;
    }

    #input .input-group {
        margin-bottom: 18px;
    }

    #input .diet-wizard-panel.active {
        padding-bottom: 0;
    }

    /* 第三步：底部栏已提供计算按钮，隐藏表单内重复计算按钮 */
    #input .diet-wizard-panel[data-step="3"] #calculate-btn {
        display: none !important;
    }

    #input .diet-wizard-panel[data-step="3"] .btn-container {
        margin-top: 0;
        margin-bottom: 0;
    }

    .diet-wizard-nav .btn.diet-wizard-calc {
        flex: 1.4;
    }

    body:has(#diet-app) .diet-fab-next.visible ~ .diet-scroll-top {
        display: none !important;
    }
}

@media (min-width: 901px) {
    .diet-fab-next {
        bottom: 24px;
    }
}

/* 内容区统一内边距 */
.diet-page-body {
    max-width: 100%;
    overflow-x: hidden;
    box-sizing: border-box;
}

.diet-app-main .tab-content {
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
}

.diet-page-desc {
    color: var(--diet-text-muted);
    font-size: 0.9rem;
    margin: -8px 0 16px;
    line-height: 1.5;
}

.diet-back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 0;
    margin-bottom: 12px;
    border: none;
    background: none;
    color: var(--diet-primary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
}

.diet-subpage .result-card {
    display: block !important;
}

/* 系统说明页 */
.system-about-section {
    background: #fff;
    border: 1px solid var(--diet-border);
    border-radius: 12px;
    padding: 16px 18px;
    margin-bottom: 14px;
}

.system-about-section h3 {
    color: var(--diet-primary);
    font-size: 1.05rem;
    margin: 0 0 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.system-about-section p {
    margin: 0 0 10px;
    color: #475569;
    font-size: 0.92rem;
    line-height: 1.65;
}

.system-about-section p:last-child {
    margin-bottom: 0;
}

.system-about-list {
    margin: 0;
    padding-left: 1.25rem;
    color: #475569;
    font-size: 0.92rem;
    line-height: 1.65;
}

.system-about-list li {
    margin-bottom: 10px;
}

.system-about-list li:last-child {
    margin-bottom: 0;
}

.system-about-meta {
    font-size: 0.85rem !important;
    color: #94a3b8 !important;
}

.system-about-dev {
    background: linear-gradient(135deg, #f8fbff 0%, #f0f7ff 100%);
}

/* 工具类页面 */
.diet-tab-tool .section-title {
    margin-top: 0;
}

.diet-mode-tool .diet-summary-strip.visible,
.diet-mode-sub .diet-summary-strip.visible {
    display: flex;
}

/* 食物成分查询 - 类别浏览 */
.food-browse-layout {
    display: flex;
    gap: 20px;
    min-height: 360px;
    align-items: stretch;
}

.food-browse-sidebar {
    width: 220px;
    flex-shrink: 0;
    border-right: 2px solid var(--diet-border);
    padding-right: 16px;
}

.food-browse-main {
    flex: 1;
    min-width: 0;
}

.food-browse-hint {
    color: #666;
    font-size: 0.9em;
    margin-bottom: 10px;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 8px;
}

.category-item-btn {
    width: 100%;
    padding: 12px 14px;
    text-align: left;
    border: 1px solid #e1eeff;
    border-radius: 8px;
    background: #fff;
    color: #333;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95em;
    min-height: 44px;
}

.category-item-btn:hover {
    border-color: var(--diet-primary);
    color: var(--diet-primary);
}

.category-item-btn.active {
    background: var(--diet-primary);
    color: #fff;
    border-color: var(--diet-primary);
    font-weight: 600;
}

#category-foods {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px 10px;
    align-items: start;
}

.food-category-item {
    text-align: center;
    padding: 10px 8px;
    white-space: normal;
    word-break: break-word;
    min-height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9em;
    line-height: 1.4;
}

.food-browse-header {
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--diet-primary);
    width: 100%;
    grid-column: 1 / -1;
}

.food-browse-loading {
    text-align: center;
    padding: 40px 16px;
    color: #666;
}

.category-select-mobile {
    display: none;
    margin-bottom: 15px;
}

@media (max-width: 768px) {
    .category-select-mobile {
        display: block;
    }

    .food-browse-sidebar {
        display: none;
    }

    .food-browse-layout {
        flex-direction: column;
        min-height: auto;
    }

    #category-foods {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px 12px;
    }
}

@media (min-width: 769px) {
    .food-browse-main {
        overflow-y: auto;
        max-height: min(60vh, 520px);
        padding-right: 4px;
    }
}

.diet-tab-tool .principles-list .recipe-card,
.diet-tab-tool .recipe-section {
    max-width: 100%;
    overflow-x: hidden;
}

.diet-tab-tool .principles-list ul {
    padding-left: 1.25rem;
    margin: 0.5rem 0;
}

.diet-tab-tool .principles-list li {
    margin-bottom: 0.35rem;
    line-height: 1.55;
}

/* 内容卡片紧凑化 */
@media (max-width: 900px) {
    .bg-gray-50.min-h-screen {
        padding-top: 8px !important;
        padding-bottom: 8px !important;
    }

    .container-main.px-3,
    .container-main.sm\\:px-4 {
        padding-left: max(16px, env(safe-area-inset-left, 0px)) !important;
        padding-right: max(16px, env(safe-area-inset-right, 0px)) !important;
    }

    .diet-container {
        border-radius: 14px !important;
        margin-bottom: 12px !important;
        box-shadow: 0 2px 12px rgba(0, 82, 204, 0.08) !important;
        overflow: hidden;
    }

    .diet-app-main {
        padding: 14px 16px calc(var(--diet-bottom-nav-h) + var(--diet-safe-bottom) + 8px) !important;
    }

    .system-about-section {
        padding: 14px;
    }

    .diet-page-body {
        padding-left: 0;
        padding-right: 0;
    }

    .diet-tab-tool .diet-page-body,
    .diet-subpage .diet-page-body {
        padding-left: 0;
        padding-right: 0;
    }

    .diet-tab-tool .recipe-card,
    .diet-tab-tool .alert,
    .diet-tab-tool .principles-list,
    .diet-tab-tool .recipe-section,
    .diet-subpage .result-card {
        border-radius: 12px;
    }

    .diet-tab-tool table,
    .diet-tab-tool pre,
    .diet-tab-tool img {
        max-width: 100%;
    }

    .diet-app-topbar-inner {
        padding: 12px 14px 10px;
    }

    .diet-summary-strip {
        padding: 8px 14px;
    }

    .diet-app .alert {
        padding: 12px;
        font-size: 0.88rem;
    }

    .diet-app .btn-container {
        flex-direction: column;
    }

    .diet-app .btn-container .btn {
        width: 100%;
        justify-content: center;
    }

    .diet-app .recipe-card {
        padding: 14px;
        margin-bottom: 14px;
    }

    .diet-app .nutrient-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .diet-app #exchange-calculator .recipe-card {
        padding: 16px;
    }

    .diet-tab-tool input,
    .diet-tab-tool select,
    .diet-tab-tool .btn {
        max-width: 100%;
    }

    .food-category-item {
        min-height: 48px !important;
    }

    .diet-app .exchange-tab-btn,
    .diet-app .exchange-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .diet-page-body > .form-row {
        flex-direction: column;
        gap: 0;
    }

    .diet-page-body > .form-row .form-col {
        min-width: 0;
        width: 100%;
    }
}

/* 交换份计算器 - 简洁紧凑 */
.exchange-calc-page {
    max-width: 960px;
    margin: 0 auto;
}

.exchange-calc-tip {
    margin: -8px 0 16px;
    font-size: 0.9rem;
    color: #64748b;
    line-height: 1.5;
}

.exchange-calc-tip a {
    color: var(--diet-primary);
    text-decoration: none;
    font-weight: 500;
}

.exchange-calc-tip a:hover {
    text-decoration: underline;
}

/* 顶部试算条 */
.exchange-calc-bar {
    background: #fff;
    border: 1px solid var(--diet-border);
    border-radius: 10px;
    padding: 14px 16px;
    margin-bottom: 16px;
}

.exchange-calc-bar-form {
    display: grid;
    grid-template-columns: 1fr 1.4fr 80px auto;
    gap: 10px;
    align-items: end;
}

.exchange-form-field label {
    display: block;
    margin-bottom: 4px;
    font-size: 0.8rem;
    color: #64748b;
    font-weight: 500;
}

.exchange-form-field select,
.exchange-form-field input {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.9rem;
    background: #fff;
    box-sizing: border-box;
}

.exchange-form-field select:focus,
.exchange-form-field input:focus {
    outline: none;
    border-color: var(--diet-primary);
}

.exchange-calc-btns {
    display: flex;
    gap: 6px;
}

.exchange-calc-btns .btn-sm {
    padding: 8px 12px;
    font-size: 0.85rem;
}

.exchange-calc-result-box {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 10px;
    border: 1px dashed #d1d5db;
    background: #fafbfc;
    transition: background 0.2s, border-color 0.2s;
}

.exchange-calc-result-box:not(.exchange-calc-result-empty) {
    background: linear-gradient(180deg, #eff6ff 0%, #f8fbff 100%);
    border: 1.5px solid #93c5fd;
    border-style: solid;
    padding: 16px 18px;
}

.exchange-calc-result-head {
    display: none;
    font-size: 0.8rem;
    font-weight: 700;
    color: #0d4d9c;
    letter-spacing: 0.06em;
    margin-bottom: 12px;
}

.exchange-calc-result-box:not(.exchange-calc-result-empty) .exchange-calc-result-head {
    display: block;
}

.exchange-calc-result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(108px, 1fr));
    gap: 10px;
}

.exchange-result-item {
    background: #fff;
    border-radius: 10px;
    padding: 12px 10px;
    text-align: center;
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 4px rgba(26, 109, 204, 0.06);
}

.exchange-result-item-highlight {
    background: #fff;
    border-color: #93c5fd;
    box-shadow: 0 2px 8px rgba(26, 109, 204, 0.12);
}

.exchange-result-item-highlight .exchange-result-value {
    font-size: 1.75rem;
    color: #0d4d9c;
}

.exchange-result-label {
    display: block;
    font-size: 0.78rem;
    color: #64748b;
    font-weight: 500;
    margin-bottom: 4px;
}

.exchange-result-value {
    display: block;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--diet-primary);
    line-height: 1.2;
}

.exchange-result-value em {
    font-style: normal;
    font-size: 0.72rem;
    font-weight: 600;
    color: #64748b;
    margin-left: 2px;
}

.exchange-calc-result-hint {
    margin: 0;
    color: #94a3b8;
    font-size: 0.85rem;
    text-align: center;
}

.exchange-calc-result-empty .exchange-calc-result-hint {
    display: block;
    padding: 6px 0;
}

.exchange-calc-result-empty .exchange-calc-result-grid:empty {
    display: none;
}

.exchange-calc-result-box:not(.exchange-calc-result-empty) .exchange-calc-result-hint {
    display: none;
}

.exchange-calc-loading {
    margin: 8px 0 0;
    font-size: 0.85rem;
    color: #94a3b8;
}

/* 查表区 */
.exchange-reference-panel {
    background: #fff;
    border: 1px solid var(--diet-border);
    border-radius: 10px;
    overflow: hidden;
}

.exchange-reference-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid #f1f5f9;
    flex-wrap: wrap;
}

.exchange-reference-title {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: #334155;
}

.exchange-search-wrap {
    flex: 1;
    min-width: 140px;
    max-width: 260px;
}

.exchange-search-wrap input {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.88rem;
    box-sizing: border-box;
}

.exchange-search-wrap input:focus {
    outline: none;
    border-color: var(--diet-primary);
}

.exchange-tabs-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 10px 16px;
    background: #fafbfc;
    border-bottom: 1px solid #f1f5f9;
}

.exchange-tab-btn {
    padding: 5px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    background: #fff;
    color: #64748b;
    font-size: 0.82rem;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s, color 0.12s;
}

.exchange-tab-btn:hover {
    border-color: #93c5fd;
    color: var(--diet-primary);
}

.exchange-tab-btn.active {
    background: var(--diet-primary);
    border-color: var(--diet-primary);
    color: #fff;
}

.exchange-content-area {
    padding: 0;
}

.exchange-content-loading {
    text-align: center;
    padding: 32px;
    color: #94a3b8;
    font-size: 0.9rem;
}

.exchange-table-empty {
    text-align: center;
    padding: 24px;
    color: #94a3b8;
    font-size: 0.9rem;
    margin: 0;
}

.exchange-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.exchange-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.86rem;
}

.exchange-table th {
    text-align: left;
    padding: 8px 12px;
    background: #f8fafc;
    color: #64748b;
    font-weight: 600;
    font-size: 0.78rem;
    border-bottom: 1px solid #e2e8f0;
    white-space: nowrap;
}

.exchange-table td {
    padding: 8px 12px;
    border-bottom: 1px solid #f1f5f9;
    color: #334155;
    vertical-align: middle;
}

.exchange-table tbody tr:hover {
    background: #f8fbff;
}

.exchange-td-name {
    font-weight: 500;
    color: #1e293b;
}

.exchange-td-weight {
    white-space: nowrap;
    color: #64748b;
}

.exchange-td-nutrient {
    color: #64748b;
    font-size: 0.82rem;
}

.exchange-td-cat {
    color: #64748b;
    font-size: 0.82rem;
    white-space: nowrap;
}

.exchange-td-actions {
    white-space: nowrap;
}

.exchange-link-btn {
    background: none;
    border: none;
    padding: 0;
    margin-right: 10px;
    font-size: 0.82rem;
    cursor: pointer;
    color: var(--diet-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.exchange-link-btn.exchange-add-btn {
    color: #16a34a;
}

.exchange-link-btn:hover {
    opacity: 0.8;
}

.exchange-add-btn-done {
    color: #16a34a !important;
    font-weight: 600;
    text-decoration: none !important;
    opacity: 1 !important;
}

/* 配餐操作提示 */
.exchange-toast {
    position: fixed;
    left: 50%;
    bottom: calc(var(--diet-bottom-nav-h) + var(--diet-safe-bottom) + 12px);
    transform: translateX(-50%) translateY(16px);
    z-index: 55;
    max-width: min(92vw, 420px);
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 0.9rem;
    color: #fff;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s, transform 0.22s;
}

.exchange-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.exchange-toast-success {
    background: #15803d;
}

.exchange-toast-warn {
    background: #b45309;
}

.exchange-toast-text {
    flex: 1;
    line-height: 1.45;
}

.exchange-toast-action {
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.45);
    color: #fff;
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}

.exchange-toast-action:hover {
    background: rgba(255, 255, 255, 0.3);
}

@media (min-width: 901px) {
    .exchange-toast {
        bottom: 24px;
    }
}

@media (max-width: 700px) {
    .exchange-calc-bar-form {
        grid-template-columns: 1fr 1fr;
    }

    .exchange-form-field-food {
        grid-column: 1 / -1;
    }

    .exchange-form-field-portions {
        grid-column: 1;
    }

    .exchange-form-field-actions {
        grid-column: 2;
    }

    .exchange-reference-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .exchange-search-wrap {
        max-width: none;
    }

    .exchange-calc-result-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .exchange-result-value {
        font-size: 1.2rem;
    }

    .exchange-result-item-highlight .exchange-result-value {
        font-size: 1.45rem;
    }

    .exchange-td-nutrient {
        max-width: 120px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
}

@media (min-width: 901px) {
    .diet-collapse-header {
        display: none;
    }

    .diet-collapse-body {
        display: block !important;
        padding: 0 0 16px;
    }
}

/* 回到顶部 */
.diet-scroll-top {
    position: fixed;
    right: 16px;
    bottom: calc(var(--diet-bottom-nav-h) + var(--diet-safe-bottom) + 72px);
    z-index: 44;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: #fff;
    color: var(--diet-primary);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
}

.diet-scroll-top.visible {
    display: flex;
}

@media (min-width: 901px) {
    .diet-scroll-top {
        bottom: 24px;
    }
}

/* ===== 食谱目标符合度 / 钠提示折叠 / 窄屏按钮 / 推荐色条 ===== */
.exchange-toast-error {
    background: #b91c1c;
}

.recipe-target-match {
    margin: 0 0 14px;
    padding: 12px 14px;
    background: #f5f9ff;
    border: 1px solid #d6e6fa;
    border-radius: 8px;
}

.recipe-target-match-title {
    font-size: 0.92rem;
    font-weight: 600;
    color: #1a6dcc;
    margin-bottom: 10px;
}

.recipe-target-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.recipe-target-row:last-child {
    margin-bottom: 0;
}

.recipe-target-label {
    flex: 0 0 52px;
    font-size: 0.85rem;
    color: #555;
}

.recipe-target-bar {
    flex: 1;
    height: 8px;
    background: #e5eef8;
    border-radius: 999px;
    overflow: hidden;
}

.recipe-target-fill {
    height: 100%;
    border-radius: 999px;
    transition: width 0.25s ease;
}

.recipe-target-fill.is-good,
.recipe-target-pct.is-good {
    --tm: #16a34a;
}

.recipe-target-fill.is-ok,
.recipe-target-pct.is-ok {
    --tm: #d97706;
}

.recipe-target-fill.is-bad,
.recipe-target-pct.is-bad {
    --tm: #dc2626;
}

.recipe-target-fill {
    background: var(--tm, #16a34a);
}

.recipe-target-pct {
    flex: 0 0 46px;
    text-align: right;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--tm, #555);
}

.recipe-target-warns {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

.recipe-target-warn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.78rem;
    color: #b45309;
    background: #fef3c7;
    border: 1px solid #fcd34d;
}

.recipe-sodium-note {
    background: #fffbeb;
    border: 1px solid #fcd34d;
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 18px;
    color: #856404;
}

.recipe-sodium-note > summary {
    cursor: pointer;
    list-style: none;
    font-size: 0.92rem;
    font-weight: 600;
    line-height: 1.45;
    user-select: none;
}

.recipe-sodium-note > summary::-webkit-details-marker {
    display: none;
}

.recipe-sodium-note > summary::before {
    content: '▸';
    display: inline-block;
    margin-right: 6px;
    transition: transform 0.15s;
}

.recipe-sodium-note[open] > summary::before {
    transform: rotate(90deg);
}

.recipe-sodium-note ul {
    margin: 10px 0 0;
    padding-left: 20px;
    font-size: 0.9rem;
    line-height: 1.7;
}

.recipe-sodium-note.recipe-important-tip {
    margin-bottom: 0;
    border-left: 4px solid #ffc107;
}

.recipe-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.recipe-card.is-recommended {
    border: 3px solid #1a6dcc;
    box-shadow: 0 4px 12px rgba(26, 109, 204, 0.2);
    border-left: 5px solid #1a6dcc;
}

@media (max-width: 640px) {
    .recipe-header {
        flex-direction: column;
        align-items: stretch !important;
        gap: 10px;
    }

    .recipe-header-actions {
        justify-content: flex-start;
    }

    .recipe-header-actions .btn {
        flex: 1 1 auto;
        min-width: calc(50% - 8px);
        text-align: center;
    }
}