/* 视觉反馈系统样式 */

/* 加载状态指示器 */
.loading-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #666;
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 按钮状态 */
.play-btn.loading {
    background-color: #ddd;
    color: #999;
    cursor: not-allowed;
}

.play-btn.loaded {
    background-color: var(--success-color);
    transform: scale(1.05);
    transition: all 0.3s ease;
}

.play-btn.error {
    background-color: var(--error-color);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* 输入框状态 */
.answer-input {
    transition: all 0.3s ease;
    position: relative;
}

.answer-input.focused {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(183, 28, 28, 0.1);
    transform: scale(1.02);
}

.answer-input.filled {
    border-color: var(--success-color);
    background-color: rgba(76, 175, 80, 0.05);
}

.answer-input.error {
    border-color: var(--error-color);
    background-color: rgba(244, 67, 54, 0.05);
    animation: inputShake 0.4s ease;
}

@keyframes inputShake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-4px); }
    40%, 80% { transform: translateX(4px); }
}

.answer-input.valid {
    border-color: var(--success-color);
    background-color: rgba(76, 175, 80, 0.05);
}

.answer-input.valid::after {
    content: '✓';
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--success-color);
    font-weight: bold;
}

/* 进度指示器 */
.progress-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 16px 0;
}

.progress-step {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    color: #666;
    transition: all 0.3s ease;
}

.progress-step.completed {
    background-color: var(--success-color);
    color: white;
}

.progress-step.current {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.2);
}

.progress-connector {
    flex: 1;
    height: 2px;
    background-color: #ddd;
    transition: background-color 0.3s ease;
}

.progress-connector.completed {
    background-color: var(--success-color);
}

/* 保存状态指示器 */
.save-indicator {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    z-index: 1000;
    transition: all 0.3s ease;
}

.save-indicator.unsaved {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.save-indicator.saved {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.save-indicator.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(-20px);
}

/* 音频波形可视化 */
.audio-visualizer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    height: 20px;
    margin: 8px 0;
}

.audio-bar {
    width: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: height 0.1s ease;
}

.audio-bar.active {
    animation: audioWave 0.8s ease-in-out infinite alternate;
}

@keyframes audioWave {
    0% { height: 4px; }
    100% { height: 16px; }
}

/* 音频时间进度 */
.time-progress {
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: #666;
    text-align: center;
    margin-top: 4px;
}

.time-progress .current {
    color: var(--primary-color);
    font-weight: bold;
}

/* 答题完成度指示器 */
.completion-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 8px;
    margin: 16px 0;
    border-left: 4px solid var(--primary-color);
}

.completion-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: conic-gradient(var(--primary-color) 0deg, #ddd 0deg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    color: var(--primary-color);
    position: relative;
}

.completion-circle::before {
    content: '';
    position: absolute;
    width: 30px;
    height: 30px;
    background-color: white;
    border-radius: 50%;
}

.completion-circle span {
    position: relative;
    z-index: 1;
}

.completion-text {
    flex: 1;
}

.completion-text h4 {
    margin: 0 0 4px 0;
    color: var(--text-color);
    font-size: 14px;
}

.completion-text p {
    margin: 0;
    color: #666;
    font-size: 12px;
}

/* 错误提示 */
.error-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--error-color);
    color: white;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.error-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--error-color);
}

.answer-input.error + .error-tooltip {
    opacity: 1;
}

/* 成功动画 */
.success-checkmark {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--success-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 8px;
    opacity: 0;
    transform: scale(0);
    transition: all 0.3s ease;
}

.success-checkmark.show {
    opacity: 1;
    transform: scale(1);
}

.success-checkmark::after {
    content: '✓';
    color: white;
    font-size: 12px;
    font-weight: bold;
}

/* 音频播放状态 */
.audio-player.playing .play-btn {
    background-color: var(--warning-color);
}

.audio-player.playing .play-btn i::before {
    content: '\f04c'; /* pause icon */
}

.audio-player.paused .play-btn {
    background-color: var(--primary-color);
}

.audio-player.loading .custom-player {
    opacity: 0.6;
    pointer-events: none;
}

/* Section 完成状态 */
.section-tab.completed {
    position: relative;
}

.section-tab.completed::after {
    content: '✓';
    position: absolute;
    top: -4px;
    right: -4px;
    width: 16px;
    height: 16px;
    background-color: var(--success-color);
    color: white;
    border-radius: 50%;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* 高亮当前活动的问题 */
.question-item.current {
    background-color: rgba(183, 28, 28, 0.05);
    border-color: var(--primary-color);
    transform: scale(1.02);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* 脉冲动画 */
.pulse {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

/* 弹跳动画 */
.bounce {
    animation: bounce 0.6s ease;
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translateY(0);
    }
    40%, 43% {
        transform: translateY(-8px);
    }
    70% {
        transform: translateY(-4px);
    }
    90% {
        transform: translateY(-2px);
    }
}

/* 淡入动画 */
.fade-in {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 滑入动画 */
.slide-in {
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(-20px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* 工具提示 */
.tooltip {
    position: relative;
    cursor: help;
}

.tooltip::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: #333;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

.tooltip::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(2px);
    border: 4px solid transparent;
    border-top-color: #333;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tooltip:hover::before,
.tooltip:hover::after {
    opacity: 1;
}

/* 响应式调整 */
@media screen and (max-width: 768px) {
    .save-indicator {
        font-size: 11px;
        padding: 6px 12px;
    }
    
    .completion-indicator {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .tooltip::before {
        font-size: 11px;
        max-width: 200px;
        white-space: normal;
    }
}

/* 减少动画偏好支持 */
@media (prefers-reduced-motion: reduce) {
    .answer-input.focused {
        transform: none;
    }
    
    .progress-step.current {
        transform: none;
    }
    
    .question-item.current {
        transform: none;
    }
    
    .pulse,
    .bounce,
    .fade-in,
    .slide-in {
        animation: none;
    }
}