/* responsive.css - 响应式布局 */

/* ========== 响应式布局 ========== */

@media (max-width: 768px) {
    .two-column-container {
        flex-direction: column;
    }
    
    .left-column,
    .right-column {
        flex: 1 1 100%;
        width: 100%;
    }
    
    .original-text {
        flex-direction: column;
    }
}

@media (max-width: 640px) {
    body {
        padding: 8px;
    }
    
    .sentence-text {
        font-size: 0.95rem;
    }
    
    .button-group button {
        padding: 5px 10px;
    }
    
    .vocab-card {
        padding: 10px;
    }
    
    .vocab-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .vocab-stats {
        font-size: 0.85rem;
    }
    
    .words-toolbar {
        flex-direction: row;
        align-items: center;
    }
    
    .search-box,
    .sort-controls {
        width: auto;
    }
    
    .search-input,
    .sort-select-trigger {
        width: auto;
    }
    
    .create-notebook-section,
    .add-word-section {
        flex-direction: row;
    }
    
    .notebook-name-input,
    .word-input,
    .meaning-input,
    .context-input {
        width: 100%;
    }
    
    .word-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
    
    .word-actions {
        margin-left: 0;
        width: 100%;
        justify-content: flex-end;
    }
    
    .batch-actions-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
    
    .batch-delete-btn {
        margin-left: 0;
        width: 100%;
    }
    
    .notebook-tabs {
        flex-direction: row;
    }
    
    .notebook-tab-wrapper {
        width: auto;
        margin: 0 8px 8px 0;
    }
    
    .notebook-tab {
        flex: 1;
        text-align: left;
    }
    
    .notebook-actions {
        opacity: 1;
        visibility: visible;
    }
    
    .sidebar {
        width: 100%;
        max-width: 320px;
    }
    
    .sidebar-toggle-btn {
        top: 12px;
        left: 12px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 8px;
    }
    
    .app-container {
        gap: 8px;
        padding: 0 4px;
    }
    
    .card-header {
        padding: 6px 12px;
    }
    
    .app-title {
        font-size: 1rem;
    }
    
    .app-title svg {
        width: 24px;
        height: 24px;
    }
    
    .vocab-card.memory-mode-card {
        padding: 12px;
    }
    
    .back-btn {
        padding: 6px 10px;
        font-size: 13px;
    }
    
    .mode-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .mode-card {
        padding: 16px 12px;
        min-height: 90px;
    }
    
    .mode-card .mode-card-label {
        font-size: 13px;
    }
    
    .mode-card .mode-card-desc {
        font-size: 10px;
    }
    
    .section-btn {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .stats-content,
    .plan-content {
        padding: 10px;
    }
    
    .stat-label,
    .stat-value {
        font-size: 12px;
    }
    
    .save-plan-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ========== 单词项响应式布局 ========== */

/* 超大屏幕 (1920px及以上) - 4个/行 */
@media (max-width: 1920px) {
    .word-item {
        flex: 1 1 calc(25% - 12px);
        max-width: calc(25% - 12px);
    }
}

/* 大屏幕 (1366px - 1919px) - 4个/行 */
@media (max-width: 1366px) {
    .word-item {
        flex: 1 1 calc(33.333% - 12px);
        max-width: calc(33.333% - 12px);
    }
}

/* 中等屏幕 (768px - 1365px) - 3个/行 */
@media (max-width: 768px) {
    .word-item {
        flex: 1 1 calc(50% - 12px);
        max-width: calc(50% - 12px);
    }
    
    .two-column-container {
        flex-direction: column;
        gap: 16px;
    }
    
    .left-column,
    .right-column {
        width: 100%;
    }
    
    .right-column {
        max-height: none;
        overflow-y: visible;
        padding-right: 0;
    }
    
    .input-panel {
        height: auto;
        max-height: 50vh;
    }
    
    .vocab-card.memory-mode-card {
        padding: 15px;
        border-radius: 0;
        box-shadow: none;
        max-width: 100%;
    }
    
    .memory-mode-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        margin-bottom: 15px;
        padding-bottom: 10px;
    }
    
    .memory-mode-header h3 {
        font-size: 16px;
    }
    
    .mode-select-section h4,
    .memory-stats-section h4,
    .memory-plan-section h4 {
        font-size: 14px;
        margin-bottom: 10px;
    }
    
    .mode-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .mode-card {
        padding: 18px 14px;
        min-height: 100px;
    }

    .section-btn {
        padding: 7px 12px;
        font-size: 13px;
    }

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

    .goal-setting {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .review-content {
        padding: 16px;
    }

    .review-text {
        font-size: 14px;
    }

    .sentence-review-content {
        padding: 16px;
    }

    .sentence-review-text {
        font-size: 16px;
    }

    .sentence-nav {
        flex-wrap: wrap;
    }

    .fill-card,
    .spell-card,
    .listen-card {
        padding: 24px 20px;
        gap: 18px;
    }

    .fill-meaning,
    .spell-hint {
        font-size: 18px;
    }

    .fill-input-row {
        max-width: 100%;
    }

    .fill-input,
    .spell-input,
    .listen-input {
        max-width: 100%;
        font-size: 15px;
    }

    .fill-sentence {
        font-size: 18px;
        padding: 14px 18px;
    }

    .fill-bottom {
        flex-direction: column;
        gap: 8px;
    }

    .letter-box {
        width: 34px;
        height: 42px;
        font-size: 19px;
    }

    .listen-choice-area {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .listen-choice-btn {
        padding: 10px 12px;
        font-size: 14px;
    }

    .fill-summary-stats,
    .spell-summary-stats,
    .listen-summary-stats {
        gap: 14px;
    }

    .fill-summary-val,
    .spell-summary-val,
    .listen-summary-val {
        font-size: 22px;
    }
}

/* 小屏幕 (480px - 767px) - 2个/行 */
@media (max-width: 480px) {
    .word-item {
        flex: 1 1 calc(50% - 12px);
        max-width: calc(50% - 12px);
    }
}

/* 超小屏幕 (375px及以下) - 1个/行 */
@media (max-width: 375px) {
    .word-item {
        flex: 1 1 100%;
        max-width: 100%;
    }
}

/* =============================================
   移动端适配（≤768px）
   桌面固定侧边栏 → 左侧抽屉 + 顶部导航栏
   ============================================= */

/* 移动端顶栏与遮罩：桌面端隐藏 */
.mobile-topbar,
.mobile-sidebar-overlay {
    display: none;
}

@media (max-width: 768px) {
    /* ---- 视口：适配 iOS 动态高度与刘海屏 ---- */
    body {
        height: 100vh;
        height: 100dvh;
        padding: 0;
    }

    /* ---- 移动端顶部导航栏 ---- */
    .mobile-topbar {
        display: flex;
        align-items: center;
        gap: 10px;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 45;
        box-sizing: border-box;
        height: calc(env(safe-area-inset-top, 0px) + 52px);
        padding: env(safe-area-inset-top, 0px) 12px 0;
        background: var(--study-card);
        border-bottom: 1px solid var(--study-border);
    }

    .mobile-menu-btn,
    .mobile-settings-btn {
        width: 44px;
        height: 44px;
        flex-shrink: 0;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        border: 1px solid var(--study-border);
        background: var(--study-muted);
        color: var(--study-muted-foreground);
        box-shadow: var(--study-shadow-sm);
        cursor: pointer;
        transition: background 0.15s ease, color 0.15s ease;
    }
    .mobile-menu-btn:active,
    .mobile-settings-btn:active {
        background: var(--study-primary);
        color: var(--study-primary-foreground);
    }

    .mobile-topbar-title {
        flex: 1;
        min-width: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        margin: 0;
        overflow: hidden;
        white-space: nowrap;
        font-family: var(--study-font-serif);
        font-size: 18px;
        font-weight: 600;
        color: var(--study-foreground);
        letter-spacing: -0.01em;
    }
    .mobile-topbar-logo {
        width: 20px;
        height: 20px;
        flex-shrink: 0;
        color: var(--study-primary);
    }

    /* ---- 侧边栏 → 抽屉 ---- */
    .app-sidebar {
        width: 280px;
        max-width: 85vw;
        z-index: 46;
        transform: translateX(-100%);
        box-shadow: var(--study-shadow-lg);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        will-change: transform;
    }
    .app-sidebar.mobile-open {
        transform: translateX(0);
    }
    /* 抽屉底部留出安全区 */
    .app-sidebar-footer {
        padding-bottom: max(12px, env(safe-area-inset-bottom, 0px));
    }
    /* 移动端隐藏折叠按钮（抽屉固定展开全部导航） */
    .sidebar-collapse-btn {
        display: none;
    }

    /* ---- 侧边栏遮罩 ---- */
    .mobile-sidebar-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(18, 20, 24, 0.42);
        z-index: 44;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
    }
    .mobile-sidebar-overlay.show {
        opacity: 1;
        pointer-events: auto;
    }

    /* ---- 主内容区：让出顶栏，取消左侧留白 ---- */
    .main-content {
        margin-left: 0;
        padding-top: calc(env(safe-area-inset-top, 0px) + 52px);
    }

    /* ---- 覆盖默认折叠状态（移动端抽屉恒为展开样式） ---- */
    body.sidebar-collapsed { --sidebar-width: 280px; }
    body.sidebar-collapsed .app-sidebar-header {
        justify-content: flex-start;
        padding: 20px 12px 16px;
        gap: 12px;
    }
    body.sidebar-collapsed .sidebar-nav-tab {
        justify-content: flex-start;
        padding: 8px 12px;
        gap: 10px;
    }
    body.sidebar-collapsed .sidebar-nav-tab .sidebar-nav-icon {
        width: 18px;
        height: 18px;
    }
    body.sidebar-collapsed .sidebar-nav-tab .sidebar-nav-label,
    body.sidebar-collapsed .app-sidebar-title {
        opacity: 1;
        max-width: 200px;
        overflow: visible;
        white-space: nowrap;
    }
    body.sidebar-collapsed .sidebar-status-row {
        justify-content: space-between;
        gap: 8px;
        padding: 0 8px;
    }
    body.sidebar-collapsed .api-status-badge {
        gap: 6px;
    }
    body.sidebar-collapsed .api-status-badge .status-dot {
        opacity: 1;
        transform: none;
        width: 10px;
        height: 10px;
        margin-right: 6px;
        padding: 0;
    }
    body.sidebar-collapsed .api-status-badge span#apiStatusText {
        opacity: 1;
        max-width: 200px;
        line-height: normal;
        font-size: 12px;
        height: auto;
        padding: 0;
        margin: 0;
    }
    body.sidebar-collapsed button.settings-btn {
        box-shadow: none;
        animation: none;
    }

    /* ---- 深度解析：紧凑化 ---- */
    .two-column-container {
        padding: 12px 12px 36px;
        gap: 14px;
    }
    .input-panel {
        padding: 14px;
    }
    .reading-toolbar {
        gap: 8px;
        padding-bottom: 10px;
        margin-bottom: 12px;
    }
    .reading-toolbar-label {
        font-size: 18px;
    }
    .panel-toggle-btn {
        width: 40px;
        height: 40px;
    }
    /* 输入区：文本域在上、操作按钮在下方居中排成一行 */
    #textareaContainer {
        flex-direction: column;
        gap: 10px;
    }
    #secondRowContainer {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 8px;
    }

    /* ---- 二级分析界面：紧凑化 ---- */
    .secondary-header {
        flex-wrap: wrap;
        gap: 8px;
        padding: 10px 12px;
        position: sticky;
        top: calc(env(safe-area-inset-top, 0px) + 52px);
        z-index: 30;
    }
    .secondary-header h2 {
        font-size: 1rem;
    }
    .secondary-header .back-btn,
    .secondary-header .icon-only-btn,
    .secondary-header .copy-btn {
        width: 40px;
        height: 40px;
        flex-shrink: 0;
        box-sizing: border-box;
        padding: 0;
        justify-content: center;
    }
    .secondary-sentences {
        height: auto;
        overflow: visible;
        padding: 12px;
    }
    .original-text,
    .secondary-translation {
        padding: 12px;
    }

    /* ---- 阅读正文：不小于 16px ---- */
    .sentence-text,
    .text-body,
    .translation-content {
        font-size: 16px;
    }

    /* ---- 记忆模式子界面：全屏沉浸，隐藏顶栏 ---- */
    body.mode-sub-interface .mobile-topbar {
        display: none;
    }
    body.mode-sub-interface .main-content {
        padding-top: 0;
    }

    /* ---- 设置面板：占满窄屏 ---- */
    .settings-panel {
        width: 100%;
        max-width: 100vw;
    }
}

/* ---- 触屏设备：增大点击区，去掉悬停态残留 ---- */
@media (pointer: coarse) and (max-width: 768px) {
    .sidebar-nav-tab {
        padding-top: 12px;
        padding-bottom: 12px;
    }
    .back-btn,
    .icon-only-btn,
    .copy-btn,
    .collapse-info-btn {
        width: 44px;
        height: 44px;
    }
}