/* 语音合成演示样式 */
* {
    box-sizing: border-box;
}

.tts-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.tts-header {
    text-align: center;
    margin-bottom: 30px;
    color: white;
}

.tts-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 300;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.tts-header p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin: 0;
}

.tts-form {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    backdrop-filter: blur(10px);
}

.input-section {
    margin-bottom: 25px;
}

.input-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 1.1rem;
}

.text-input {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 12px;
    font-size: 16px;
    line-height: 1.5;
    resize: vertical;
    transition: all 0.3s ease;
    font-family: inherit;
}

.text-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.char-count {
    text-align: right;
    margin-top: 5px;
    font-size: 0.9rem;
    color: #666;
}

.settings-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 12px;
}

.setting-group {
    display: flex;
    flex-direction: column;
}

.setting-label {
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 0.95rem;
}

.setting-select {
    padding: 10px 12px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    background: white;
}

.setting-select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.1);
}

.setting-range {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #ddd;
    outline: none;
    transition: all 0.3s ease;
}

.setting-range::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #667eea;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.setting-range::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.range-value {
    margin-top: 5px;
    font-size: 0.9rem;
    color: #667eea;
    font-weight: 600;
    text-align: center;
}

.button-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
}

.btn {
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

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

.my-btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    color: white;
}

.icon-mic::before { content: "🎤"; }
.icon-play::before { content: "▶️"; }
.icon-download::before { content: "📥"; }
.icon-trash::before { content: "🗑️"; }

.status-section {
    margin-bottom: 20px;
}

.status-message {
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 10px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
}

.status-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.status-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.status-message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: #e9ecef;
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 0%;
    animation: pulse 1.5s ease-in-out infinite alternate;
}

@keyframes pulse {
    0% { opacity: 1; }
    100% { opacity: 0.6; }
}

.audio-section {
    text-align: center;
}

.audio-section audio {
    width: 100%;
    max-width: 400px;
    border-radius: 10px;
    background: #f8f9fa;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .tts-container {
        padding: 15px;
    }
    
    .tts-form {
        padding: 20px;
    }
    
    .tts-header h1 {
        font-size: 2rem;
    }
    
    .settings-section {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .button-section {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .button-section {
        grid-template-columns: 1fr;
    }
    
    .tts-header h1 {
        font-size: 1.8rem;
    }
}