/* ==================== 海洋主题德语听力生成器 ==================== */

:root {
    /* 海洋色阶 —— 由浅到深 */
    --ocean-1: #E3F2FD;   /* 海面泡沫 */
    --ocean-2: #BBDEFB;   /* 浅海 */
    --ocean-3: #64B5F6;   /* 中海 */
    --ocean-4: #1976D2;   /* 深海 */
    --ocean-5: #0D47A1;   /* 海底 */
    --ocean-6: #062E6B;   /* 深渊 */

    /* 功能色 */
    --primary: #1976D2;
    --primary-light: #42A5F5;
    --primary-dark: #0D47A1;
    --accent: #0288D1;
    --success: #00897B;
    --warning: #F57C00;

    /* 文字色 */
    --text-heading: #0D47A1;
    --text-body: #37474F;
    --text-light: #78909C;
    --text-white: #FFFFFF;

    /* 卡片 */
    --card-bg: rgba(255, 255, 255, 0.88);
    --card-border: rgba(255, 255, 255, 0.6);
    --card-shadow: 0 8px 32px rgba(13, 71, 161, 0.15);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
}

/* ==================== 主题：森林绿 ==================== */
:root[data-theme="forest"] {
    --ocean-1: #E8F5E9;
    --ocean-2: #C8E6C9;
    --ocean-3: #81C784;
    --ocean-4: #388E3C;
    --ocean-5: #1B5E20;
    --ocean-6: #0A3D0E;
    --primary: #388E3C;
    --primary-light: #66BB6A;
    --primary-dark: #1B5E20;
    --accent: #2E7D32;
    --success: #00897B;
    --warning: #F57C00;
    --text-heading: #1B5E20;
    --text-body: #37474F;
    --text-light: #78909C;
    --card-bg: rgba(255, 255, 255, 0.88);
    --card-shadow: 0 8px 32px rgba(27, 94, 32, 0.15);
}

/* ==================== 主题：暖阳橙 ==================== */
:root[data-theme="sunset"] {
    --ocean-1: #FFF3E0;
    --ocean-2: #FFE0B2;
    --ocean-3: #FFB74D;
    --ocean-4: #F57C00;
    --ocean-5: #E65100;
    --ocean-6: #BF360C;
    --primary: #F57C00;
    --primary-light: #FF9800;
    --primary-dark: #E65100;
    --accent: #EF6C00;
    --success: #00897B;
    --warning: #D84315;
    --text-heading: #E65100;
    --text-body: #4E342E;
    --text-light: #8D6E63;
    --card-bg: rgba(255, 255, 255, 0.88);
    --card-shadow: 0 8px 32px rgba(230, 81, 0, 0.15);
}

/* ==================== 主题：樱花粉 ==================== */
:root[data-theme="sakura"] {
    --ocean-1: #FCE4EC;
    --ocean-2: #F8BBD0;
    --ocean-3: #F48FB1;
    --ocean-4: #EC407A;
    --ocean-5: #AD1457;
    --ocean-6: #880E4F;
    --primary: #EC407A;
    --primary-light: #F06292;
    --primary-dark: #AD1457;
    --accent: #D81B60;
    --success: #00897B;
    --warning: #F57C00;
    --text-heading: #AD1457;
    --text-body: #4A2C38;
    --text-light: #8D6E63;
    --card-bg: rgba(255, 255, 255, 0.90);
    --card-shadow: 0 8px 32px rgba(173, 20, 87, 0.12);
}

/* ==================== 基础重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(180deg,
        var(--ocean-1) 0%,
        var(--ocean-2) 25%,
        var(--ocean-3) 50%,
        var(--ocean-4) 75%,
        var(--ocean-5) 100%
    );
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text-body);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ==================== 海浪装饰 ==================== */
.ocean-waves {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 120px;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.wave {
    position: absolute;
    bottom: 0;
    left: -50%;
    width: 200%;
    height: 80px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
    animation: wave-flow 12s ease-in-out infinite;
}

.wave1 { animation-delay: 0s; opacity: 0.5; }
.wave2 { animation-delay: -4s; opacity: 0.3; bottom: 10px; }
.wave3 { animation-delay: -8s; opacity: 0.2; bottom: 20px; }

@keyframes wave-flow {
    0%, 100% { transform: translateX(0) translateY(0); }
    50% { transform: translateX(-5%) translateY(-8px); }
}

/* ==================== 容器 ==================== */
.container {
    max-width: 820px;
    margin: 0 auto;
    padding: 20px 16px 60px;
    position: relative;
    z-index: 1;
}

/* ==================== 标题 ==================== */
.header {
    text-align: center;
    padding: 30px 0 24px;
}

.header h1 {
    font-size: 2rem;
    color: var(--ocean-5);
    font-weight: 800;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 8px rgba(255, 255, 255, 0.6);
}

.subtitle {
    color: var(--ocean-4);
    font-size: 1rem;
    margin-top: 6px;
    opacity: 0.8;
}

/* ==================== 表单卡片 ==================== */
.form-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    box-shadow: var(--card-shadow);
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 22px;
}

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

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 10px;
    letter-spacing: 0.3px;
}

/* ==================== 切换按钮组 ==================== */
.toggle-group,
.pill-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.toggle-btn,
.pill-btn {
    padding: 8px 18px;
    border: 2px solid var(--ocean-3);
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.6);
    color: var(--ocean-4);
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
}

.toggle-btn:hover,
.pill-btn:hover {
    background: rgba(25, 118, 210, 0.1);
    border-color: var(--ocean-4);
    transform: translateY(-1px);
}

.toggle-btn.active,
.pill-btn.active {
    background: linear-gradient(135deg, var(--ocean-4), var(--ocean-5));
    border-color: var(--ocean-5);
    color: white;
    box-shadow: 0 4px 12px rgba(13, 71, 161, 0.3);
}

/* ==================== 主题输入 ==================== */
.theme-input-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

#theme-input {
    flex: 1;
    min-width: 200px;
    padding: 12px 16px;
    border: 2px solid var(--ocean-3);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    background: rgba(255, 255, 255, 0.7);
    color: var(--text-body);
    transition: all 0.3s ease;
    outline: none;
}

#theme-input:focus {
    border-color: var(--ocean-4);
    background: white;
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.15);
}

.generate-btn {
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--ocean-4), var(--ocean-5));
    color: white;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(13, 71, 161, 0.35);
    white-space: nowrap;
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(13, 71, 161, 0.45);
}

.generate-btn:active:not(:disabled) {
    transform: translateY(0);
}

.generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ==================== 加载动画 ==================== */
.loading-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 40px 24px;
    text-align: center;
    box-shadow: var(--card-shadow);
    margin-bottom: 20px;
}

.spinner-container {
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--ocean-2);
    border-top-color: var(--ocean-4);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    color: var(--ocean-5);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ==================== 错误提示 ==================== */
.error-card {
    background: rgba(255, 235, 238, 0.92);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(229, 57, 53, 0.3);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    box-shadow: 0 4px 16px rgba(229, 57, 53, 0.15);
    margin-bottom: 20px;
}

.error-card p {
    color: #C62828;
    font-size: 0.9rem;
}

/* ==================== 结果区 ==================== */
.results {
    animation: slideUp 0.5s ease;
}

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

.result-meta {
    text-align: center;
    margin-bottom: 16px;
    color: var(--ocean-5);
    font-size: 0.85rem;
    opacity: 0.7;
}

.result-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    box-shadow: var(--card-shadow);
    margin-bottom: 16px;
    transition: all 0.4s ease;
}

.hidden-card {
    opacity: 0;
    max-height: 0;
    padding: 0 24px;
    overflow: hidden;
    margin-bottom: 0;
    border-width: 0;
}

.hidden-card.revealed {
    opacity: 1;
    max-height: 2000px;
    padding: 22px 24px;
    margin-bottom: 16px;
    border-width: 1px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card-title {
    font-size: 1.1rem;
    color: var(--ocean-5);
    font-weight: 700;
}

/* ==================== 音频播放器 ==================== */
.audio-card {
    background: linear-gradient(135deg, rgba(227, 242, 253, 0.9), rgba(187, 222, 251, 0.85));
}

.audio-player {
    width: 100%;
    height: 44px;
    border-radius: var(--radius-md);
    outline: none;
}

.audio-player::-webkit-media-controls-panel {
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-md);
}

.voice-info {
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--ocean-4);
    opacity: 0.7;
}

.voice-info .voice-tag {
    display: inline-block;
    padding: 2px 8px;
    margin: 2px 4px 2px 0;
    background: rgba(25, 118, 210, 0.1);
    border-radius: 50px;
    font-weight: 500;
}

/* ==================== 复制按钮 ==================== */
.copy-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    border: 1.5px solid var(--ocean-3);
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.6);
    color: var(--ocean-4);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: var(--ocean-4);
    color: white;
    border-color: var(--ocean-4);
}

.copy-btn.copied {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

/* ==================== 内容区域 ==================== */
.content-area {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-body);
}

/* 题目列表 */
.question-item {
    padding: 14px 0;
    border-bottom: 1px solid rgba(100, 181, 246, 0.2);
}

.question-item:last-child {
    border-bottom: none;
}

.question-num {
    font-weight: 700;
    color: var(--ocean-4);
    margin-right: 6px;
}

.question-text {
    color: var(--text-body);
}

.question-options {
    margin-top: 8px;
    padding-left: 20px;
}

.question-option {
    padding: 3px 0;
    color: var(--text-body);
}

/* 听力原文 */
.transcript-area {
    font-size: 0.95rem;
    line-height: 1.9;
}

.transcript-line {
    padding: 6px 0;
}

.transcript-speaker {
    font-weight: 700;
    color: var(--ocean-5);
    margin-right: 6px;
}

/* 答案列表 */
.answer-item {
    display: flex;
    align-items: baseline;
    padding: 8px 0;
    border-bottom: 1px solid rgba(100, 181, 246, 0.15);
}

.answer-item:last-child {
    border-bottom: none;
}

.answer-num {
    font-weight: 700;
    color: var(--ocean-4);
    min-width: 28px;
}

.answer-text {
    color: var(--success);
    font-weight: 600;
}

/* ==================== 对答案按钮 ==================== */
.reveal-section {
    text-align: center;
    margin: 20px 0;
}

.reveal-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 40px;
    border: none;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--ocean-4), var(--accent));
    color: white;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(25, 118, 210, 0.35);
    animation: pulse 2s ease-in-out infinite;
}

.reveal-btn:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 8px 28px rgba(25, 118, 210, 0.5);
}

.reveal-btn:active {
    transform: translateY(0) scale(1);
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 6px 20px rgba(25, 118, 210, 0.35); }
    50% { box-shadow: 0 6px 28px rgba(25, 118, 210, 0.55); }
}

/* ==================== 响应式 ==================== */
@media (max-width: 600px) {
    .header h1 {
        font-size: 1.5rem;
    }
    
    .form-card {
        padding: 20px 16px;
    }
    
    .toggle-btn, .pill-btn {
        padding: 6px 14px;
        font-size: 0.85rem;
    }
    
    .theme-input-group {
        flex-direction: column;
    }
    
    .generate-btn {
        width: 100%;
    }
    
    .result-card {
        padding: 18px 16px;
    }
}

/* ==================== 滚动条 ==================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--ocean-1);
}

::-webkit-scrollbar-thumb {
    background: var(--ocean-3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--ocean-4);
}

/* ==================== 换肤选择器 ==================== */
.theme-switcher {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 14px;
}

.theme-dot {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.6);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.theme-dot:hover {
    transform: scale(1.15);
}

.theme-dot.active {
    border-color: white;
    box-shadow: 0 0 0 3px var(--ocean-4), 0 2px 8px rgba(0, 0, 0, 0.2);
    transform: scale(1.1);
}

.theme-dot[data-theme="ocean"] {
    background: linear-gradient(135deg, #64B5F6, #0D47A1);
}
.theme-dot[data-theme="forest"] {
    background: linear-gradient(135deg, #81C784, #1B5E20);
}
.theme-dot[data-theme="sunset"] {
    background: linear-gradient(135deg, #FFB74D, #E65100);
}
.theme-dot[data-theme="sakura"] {
    background: linear-gradient(135deg, #F48FB1, #AD1457);
}

/* ==================== 搭子名字编辑 ==================== */
.companion-name {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
}

.companion-name-text {
    color: var(--ocean-4);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    padding: 2px 8px;
    border-radius: 8px;
    transition: background 0.2s ease;
}

.companion-name-text:hover {
    background: rgba(255, 255, 255, 0.3);
}

.companion-name-edit {
    font-size: 0.8rem;
    opacity: 0.5;
}

.name-input {
    padding: 4px 10px;
    border: 2px solid var(--ocean-3);
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--ocean-5);
    background: white;
    outline: none;
    text-align: center;
    width: 120px;
}

.name-input:focus {
    border-color: var(--ocean-4);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.15);
}

/* ==================== 题目交互区 ==================== */

/* 选择题选项 */
.question-options {
    margin-top: 10px;
    padding-left: 0 !important;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.option-label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.25s ease;
    user-select: none;
}

.option-label:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: var(--ocean-3);
}

.option-label input[type="radio"] {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--ocean-3);
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.option-label input[type="radio"]:checked {
    border-color: var(--ocean-4);
    background: var(--ocean-4);
}

.option-label input[type="radio"]:checked::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: white;
}

.option-label:has(input:checked) {
    background: rgba(25, 118, 210, 0.08);
    border-color: var(--ocean-4);
}

.option-label.selected-correct {
    background: rgba(0, 137, 123, 0.12);
    border-color: var(--success);
}

.option-label.selected-correct input[type="radio"] {
    border-color: var(--success);
    background: var(--success);
}

.option-label.selected-wrong {
    background: rgba(229, 57, 53, 0.10);
    border-color: #E53935;
}

.option-label.selected-wrong input[type="radio"] {
    border-color: #E53935;
    background: #E53935;
}

.option-label.correct-answer {
    background: rgba(0, 137, 123, 0.08);
    border-color: var(--success);
    border-style: dashed;
}

.option-text {
    color: var(--text-body);
    line-height: 1.5;
}

/* 判分标记 */
.judge-icon {
    margin-left: auto;
    font-size: 1.1rem;
    flex-shrink: 0;
}

/* 填空题输入 */
.fill-blank-input {
    display: inline-block;
    min-width: 160px;
    padding: 6px 12px;
    border: 2px solid var(--ocean-3);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    background: rgba(255, 255, 255, 0.8);
    color: var(--text-body);
    outline: none;
    margin: 0 4px;
    transition: all 0.2s ease;
}

.fill-blank-input:focus {
    border-color: var(--ocean-4);
    background: white;
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.15);
}

.fill-blank-input.judged-correct {
    border-color: var(--success);
    background: rgba(0, 137, 123, 0.08);
    color: var(--success);
}

.fill-blank-input.judged-wrong {
    border-color: #E53935;
    background: rgba(229, 57, 53, 0.06);
    color: #C62828;
    text-decoration: line-through;
}

/* 简答题输入 */
.short-answer-input {
    width: 100%;
    min-height: 80px;
    padding: 10px 14px;
    border: 2px solid var(--ocean-3);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    background: rgba(255, 255, 255, 0.8);
    color: var(--text-body);
    outline: none;
    margin-top: 8px;
    resize: vertical;
    font-family: inherit;
    line-height: 1.6;
    transition: all 0.2s ease;
}

.short-answer-input:focus {
    border-color: var(--ocean-4);
    background: white;
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.15);
}

/* 判分汇总条 */
.judge-summary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(0, 137, 123, 0.1), rgba(25, 118, 210, 0.08));
    margin-bottom: 16px;
    font-size: 1rem;
    font-weight: 600;
}

.judge-score {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--ocean-5);
}

.judge-score.perfect {
    color: var(--success);
}