/* words.html 专用样式 */

/* ========== 容器布局 ========== */
.word-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: var(--site-max-width);
    margin: 0.5rem auto 0;
    padding: 5rem var(--site-gutter) 2rem;
}

/* ========== 单词样式 ========== */
.fc-word,
#word {
    font-size: 45px;
    font-size: 3rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 0.15rem;
    margin-left: auto;
    margin-right: auto;
    width: fit-content;
    padding: 0.5rem 1.5rem;
    cursor: pointer;
}

.word-content {
    position: relative;
    display: inline-block;
}

/* 拼读时单个字母高亮 */
.letter-span {
    display: inline-block;
    transition: all 0.15s ease;
    padding: 0 1px;
}

.letter-active {
    color: #e74c3c;
    transform: scale(1.3);
    text-shadow: 0 0 8px rgba(231, 76, 60, 0.4);
}

/* 朗读释义时高亮 */
.definition-active {
    color: #e74c3c;
    text-shadow: 0 0 12px rgba(231, 76, 60, 0.4);
    transition: all 0.3s ease;
}

/* 朗读音标时高亮 */
.fc-phonetic.phonetic-active,
#phonetic.phonetic-active {
    color: #e74c3c;
    text-shadow: 0 0 12px rgba(231, 76, 60, 0.4);
    transition: all 0.3s ease;
}

/* 朗读例句时高亮 */
.sentence-active {
    background-color: #fff9e6;
    border-left: 4px solid #f39c12;
    padding-left: 12px;
    transition: all 0.3s ease;
}

/* ========== 音标样式 ========== */
.fc-phonetic,
#phonetic {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 0.25rem;
    margin-left: auto;
    margin-right: auto;
    width: fit-content;
    padding: 0.5rem 1.5rem;
    color: #666;
}

/* ========== 释义样式 ========== */
.fc-definition,
#definition {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 0.5rem;
    margin-left: auto;
    margin-right: auto;
    width: fit-content;
    padding: 0.5rem 1.5rem;
}

/* ========== 例句样式 ========== */
.fc-example,
#example {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    /* 让例句区域整体居中，但内部文字仍左对齐 */
    width: fit-content;
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
}

.sentence-item {
    margin-bottom: 1.2rem;
    text-align: left;
    position: relative;
}

.sentence-item:last-child {
    margin-bottom: 0;
}

.sentence-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.3rem;
}

.play-btn {
    width: 24px;
    height: 24px;
    cursor: pointer;
    flex-shrink: 0;
    transition: transform 0.15s ease;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.play-btn:active {
    transform: scale(0.8);
}

.play-btn.tap-anim {
    animation: tapPulse 0.3s ease-out;
}

@keyframes tapPulse {
    0% { transform: scale(1); }
    40% { transform: scale(0.75); }
    70% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

.sentence {
    position: relative;
    display: inline-block;
    flex: 0 1 auto;
    line-height: 1.6;
}

.sentence-translation {
    color: #666;
    padding-left: 32px;
}

/* ========== 可点击单词样式 ========== */
.clickable-word {
    position: relative;
    cursor: pointer;
    padding: 0 2px;
    border-radius: 3px;
    transition: background-color 0.2s;
}

@media (hover: hover) {
    .clickable-word:hover {
        background-color: #e3f2fd;
    }
}

/* ========== 导航按钮样式 ========== */
.nav-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 2rem;
    gap: 1rem;
    /* 听写模式有 5 个按钮，窄屏自动换行避免溢出 */
    flex-wrap: wrap;
}

.word-count {
    flex: 0 0 100px;
    text-align: center;
    /* 与左右导航按钮一致：相对 :root 基准，不受 #page 缩放影响 */
    font-size: 1.2rem;
    color: #6E6A64;
}

/* 按钮样式 - 强制移除点击后的激活状态 */
.nav-buttons .btn,
.nav-buttons .btn:focus,
.nav-buttons .btn:active,
.nav-buttons .btn.active,
.nav-buttons .btn:not(:disabled):not(.disabled):active,
.nav-buttons .btn:not(:disabled):not(.disabled).active {
    background-color: #FBF4E6 !important;
    border-color: #ddd !important;
    color: #DACDB9 !important;
    box-shadow: none !important;
    outline: none !important;
}

/* 其中 :hover 部分只在鼠标设备生效（触屏点一下会粘住不释放） */
@media (hover: hover) {
    .nav-buttons .btn:hover {
        background-color: #FBF4E6 !important;
        border-color: #ddd !important;
        color: #DACDB9 !important;
        box-shadow: none !important;
        outline: none !important;
    }
}

/* ========== 播放动画效果 - 音频频谱条 ========== */

/* 单词朗读时标红（不再显示竖条动画） */
.word-content.playing {
    color: #e74c3c;
    /* background-color: #fff5f5; */
}

/* 单词模式正面单词朗读时标红 */
.front-word.playing {
    color: #e74c3c;
    text-shadow: 0 0 16px rgba(231, 76, 60, 0.25);
}

/* 例句模式正面例句朗读时标红 */
.front-sentence.playing {
    color: #e74c3c;
    text-shadow: 0 0 16px rgba(231, 76, 60, 0.25);
}

/* 例句动画 - 定位在例句右侧 */
.sentence.playing::after {
    content: '';
    position: absolute;
    top: 40%;
    transform: translateY(-50%);
    right: -25px;
    width: 4px;
    background: #49d391;
    border-radius: 2px;
    box-shadow: -8px 0 0 #49d391, -16px 0 0 #49d391;
    animation: soundBars 1.2s ease-in-out infinite;
}

/* 可点击单词动画 */
.clickable-word.playing::after {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: -15px;
    width: 3px;
    background: #49d391;
    border-radius: 2px;
    box-shadow: -6px 0 0 #49d391, -12px 0 0 #49d391;
    animation: soundBars 1.2s ease-in-out infinite;
}

@keyframes soundBars {
    0%, 100% {
        height: 4px;
        transform: translateY(8px);
    }
    25% {
        height: 16px;
        transform: translateY(0);
    }
    50% {
        height: 10px;
        transform: translateY(4px);
    }
    75% {
        height: 20px;
        transform: translateY(-4px);
    }
}

/* ========== 选词模态框样式 ========== */
.word-list-container {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #EFE6D9;
    border-radius: 0.375rem;
    padding: 0.5rem;
    background-color: #FBF4E6;
}

.word-item {
    display: flex;
    align-items: center;
    padding: 0.5rem;
    margin-bottom: 0.25rem;
    background-color: white;
    border: 1px solid #EFE6D9;
    border-radius: 0.25rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

@media (hover: hover) {
    .word-item:hover {
        background-color: #e9ecef;
        border-color: #adb5bd;
    }
}

.word-item.selected {
    background-color: #d1ecf1;
    border-color: #17a2b8;
    color: #0c5460;
}

.word-item input[type="checkbox"] {
    margin-right: 0.75rem;
}

.word-item .word-idx,
.selected-word-item .word-idx {
    color: #6E6A64;
    font-size: 1.0rem;
    margin-right: 0.4rem;
    flex-shrink: 0;
    min-width: 1.2rem;
    text-align: right;
}

.word-item .word-text {
    flex: 1;
    font-weight: 500;
}

.word-item .word-translation {
    color: #6E6A64;
    font-size: 0.875rem;
    margin-left: 0.5rem;
}

.word-actions {
    display: flex;
    gap: 0.5rem;
}

/* 已选择单词容器样式 */
.selected-words-container {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #EFE6D9;
    border-radius: 0.375rem;
    padding: 0.5rem;
    background-color: #FBF4E6;
    min-height: 200px;
}

.empty-selection {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 150px;
    color: #6E6A64;
}

.selected-word-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem;
    margin-bottom: 0.25rem;
    background-color: white;
    border: 1px solid #17a2b8;
    border-radius: 0.25rem;
    background-color: #d1ecf1;
    color: #0c5460;
}

.selected-word-item .word-info {
    flex: 1;
}

.selected-word-item .word-text {
    font-weight: 500;
    margin-right: 0.5rem;
}

.selected-word-item .word-translation {
    color: #6E6A64;
    font-size: 0.875rem;
}

.selected-word-item .remove-btn {
    background: none;
    border: none;
    color: #dc3545;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.25rem;
    font-size: 1.2rem;
    line-height: 1;
}

@media (hover: hover) {
    .selected-word-item .remove-btn:hover {
        background-color: #f8d7da;
    }
}

/* 模态框自定义样式 */
#wordSelectorModal .modal-content {
    border-radius: 0.75rem;
    border: none;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

#wordSelectorModal .modal-header {
    background-color: #FBF4E6;
    border-bottom: 1px solid #EFE6D9;
    border-radius: 0.75rem 0.75rem 0 0;
}

#wordSelectorModal .modal-footer {
    background-color: #FBF4E6;
    border-top: 1px solid #EFE6D9;
    border-radius: 0 0 0.75rem 0.75rem;
}

/* 数据来源选择样式 */
.data-source-options {
    display: flex;
    gap: 1rem;
}

.data-source-options .radio-label {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    border: 1px solid #EFE6D9;
    border-radius: 0.375rem;
    transition: all 0.2s ease;
}

@media (hover: hover) {
    .data-source-options .radio-label:hover {
        background-color: #FBF4E6;
        border-color: #adb5bd;
    }
}

.data-source-options input[type="radio"] {
    margin-right: 0.5rem;
}

#manual-input-section textarea {
    resize: vertical;
}

/* 响应式布局调整 */
@media (max-width: 768px) {
    #wordSelectorModal .modal-dialog {
        max-width: 95%;
        margin: 1rem auto;
    }
    
    #wordSelectorModal .row {
        flex-direction: column;
    }
    
    #wordSelectorModal .col-md-6 {
        width: 100%;
    }
    
    .data-source-options {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* ========== 闪卡样式 ========== */
.flashcard {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    perspective: 1200px;
}

.flashcard-inner {
    position: relative;
    width: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
    transform-style: preserve-3d;
    /* 正反两面叠放在同一格，grid 高度取两者中较高者，
       使卡片高度始终以内容更多的一面为准（解决单词/例句模式正面太矮问题） */
    display: grid;
}

.flashcard.flipped .flashcard-inner {
    transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 1.5rem;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    grid-area: 1 / 1;
    /* 让每面独立撑高：单词/例句模式正面内容矮、背面完整卡片高，
       背面正常参与文档流撑高，高度不再受正面限制 */
    position: relative;
}

/* 正面：学习内容。
   用 flex 纵向布局：听写模式完整卡片从上到下排列；
   单词/例句模式正面元素用 margin:auto 可实现垂直水平居中。 */
.flashcard-front {
    display: flex;
    flex-direction: column;
    background: #ffffff;
    padding: 1.25rem 2rem 2rem;
    border: 1px solid #eef0f3;
}

/* ========== 陌生单词标记按钮（纯 star 图标，无圆圈） ========== */
.unfamiliar-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem;
    background: transparent;
    border: none;
    cursor: pointer;
    color: #adb5bd;
    transition: color 0.2s ease, transform 0.15s ease;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    z-index: 2;
}

.unfamiliar-btn svg {
    width: 28px;
    height: 28px;
    fill: none;
}

@media (hover: hover) {
    .unfamiliar-btn:hover {
        color: #6E6A64;
    }
}

.unfamiliar-btn:active {
    transform: scale(0.85);
}

.unfamiliar-btn.marked {
    color: #f5a623;
}

/* 陌生标记：保持黄色实心星（覆盖上面的 fill:none） */
.unfamiliar-btn.marked svg,
.unfamiliar-btn svg.marked {
    fill: currentColor;
}

.unfamiliar-btn .marked {
    color: #f5a623;
}

.filter-star-icon {
    width: 18px;
    height: 18px;
    color: #f5a623;
    flex-shrink: 0;
}

/* 选词列表中的陌生标记图标 */
.unfamiliar-mark {
    width: 16px;
    height: 16px;
    color: #f5a623;
    fill: currentColor;
    margin-left: 0.35rem;
    flex-shrink: 0;
}

/* 只看陌生单词筛选开关样式（已移除该开关，保留备用） */
/* .switch-label { display: flex; align-items: center; cursor: pointer; user-select: none; font-weight: 500; color: #4D4A46; } */

/* 背面：请默写 */
.flashcard-back {
    transform: rotateY(180deg);
    background: linear-gradient(135deg, #6a11cb 0%, #D93E3E 100%);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    /* grid-area:1/1 下参与撑高，不再 absolute；默认 stretch 对齐容器高度 */
}

.flashcard-back-icon {
    font-size: 3.5rem;
}

.flashcard-back-title {
    font-size: 2.6rem;
    font-weight: bold;
    letter-spacing: 0.2em;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.flashcard-back-sub {
    font-size: 1rem;
    opacity: 0.85;
    letter-spacing: 0.1em;
}

/* 背面显示完整卡片（单词/例句模式）时：白色底、黑字。
   高度由 grid 撑开，内容过多时允许内部滚动（极少单词会超高） */
.flashcard-back.fullcard-mode {
    background: #ffffff;
    color: #1d1d1f;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    overflow-y: auto;
    padding: 1.25rem 2rem 2rem;
}

/* ========== 单词/例句模式：正面简易提示区 ========== */
.front-word {
    font-size: 4.5rem;
    font-weight: bold;
    text-align: center;
    margin: auto;
    cursor: pointer;
    padding: 2rem;
    color: #1d1d1f;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.front-sentence-group {
    margin: auto;
    padding: 2rem;
    width: 100%;
}

.front-sentence {
    font-size: 2.2rem;
    font-weight: 600;
    text-align: center;
    color: #1d1d1f;
    line-height: 1.6;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.front-hint {
    position: absolute;
    bottom: 1rem;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 0.9rem;
    color: #adb5bd;
    letter-spacing: 0.08em;
}

/* 闪卡听写正面："喇叭 + 圆圈"按钮，点击朗读单词 3 遍 */
.front-speaker {
    width: 128px;
    height: 128px;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    cursor: pointer;
    color: #4D4A46;
    background: #FFF3E4;
    border: 3px solid #9C948A;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.10);
    transition: all 0.2s;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}
@media (hover: hover) {
    .front-speaker:hover {
        background: #d7e9fa;
    }
}
.front-speaker:active {
    background: #fee2e2;
    border-color: #e74c3c;
    transform: scale(0.95);
}
/* 朗读中：喇叭标红 + 轻微呼吸动画 */
.front-speaker.playing {
    color: #e74c3c;
    border-color: #e74c3c;
    animation: front-speaker-pulse 1s ease-in-out infinite;
}
@keyframes front-speaker-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.06); }
}

/* ========== 例句单词释义气泡（Bootstrap Popover）样式 ========== */
.word-popover .popover-header { display: none; }
.word-popover .popover-body { font-size: 0.92rem; }
.word-popover .wp-phonetic { color: #6E6A64; }
.word-popover .wp-tag {
    display: inline-block;
    background: #f1f3f5;
    border: 1px solid #EFE6D9;
    border-radius: 4px;
    padding: 0 6px;
    margin-right: 4px;
    font-size: 0.78rem;
}
.word-popover .wp-example { margin-top: 6px; }
.word-popover .wp-example .en { font-weight: 500; }
.word-popover .wp-example .zh { color: #6E6A64; font-size: 0.82rem; }
.word-popover hr { margin: 6px 0; opacity: .25; }