* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #ffffff;
    color: #1a1a1a;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 30px;
}

.main-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
    min-height: 70vh;
}

.question-section {
    padding-right: 40px;
}

.main-headline {
    font-size: 4.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 30px;
    /* text-transform: uppercase; */
    letter-spacing: -0.02em;
}

.main-headline .highlight {
    color: #005A9C;
}

.alternating-name {
    display: inline-block;
    min-width: 600px;
    transition: all 0.2s ease;
    /* border-bottom: 4px solid #005A9C; */
    /* padding-bottom: 8px; */
    margin-top: 15px;
    font-style: italic;
    letter-spacing: -0.02em;
    /* color: #005A9C; */
}

.alternating-name.fade {
    opacity: 0.3;
    transform: translateY(-5px);
}

.name-context {
    font-size: 1.8rem;
    color: #666;
    /* margin-bottom: 40px; */
    font-weight: 400;
}

.name-order-indicator {
    font-size: 1rem;
    color: #999;
    font-weight: 400;
    /* letter-spacing: 0.1em; */
    margin-bottom: 30px;
    min-height: 20px;
    transition: all 0.3s ease;
}

.name-order-indicator.fade {
    opacity: 0.3;
}

.hangul-display {
    font-size: 6rem;
    font-weight: 900;
    color: #1a1a1a;
    text-align: center;
    margin-top: 20px;
}

.answer-section {
    background: #f8f9fa;
    padding: 60px 50px;
    border-radius: 16px;
    text-align: center;
}

.answer-label {
    font-size: 1rem;
    font-weight: 700;
    color: #005A9C;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}

.final-answer {
    font-size: 3rem;
    font-weight: 800;
    color: #1a1a1a;
    margin-bottom: 40px;
    line-height: 1.2;
}

.pronunciation-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.pronunciation-item {
    background: white;
    padding: 25px 15px;
    border-radius: 12px;
    border: 2px solid #e9ecef;
    text-align: center;
}

.pronunciation-item h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: #005A9C;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pronunciation-item .syllable {
    font-size: 2rem;
    font-weight: 900;
    color: #1a1a1a;
    margin-bottom: 8px;
    display: block;
}

.pronunciation-item .guide {
    font-size: 1rem;
    font-weight: 600;
    color: #005A9C;
    margin-bottom: 8px;
}

.pronunciation-item .explanation {
    font-size: 0.8rem;
    color: #666;
    line-height: 1.3;
}

.audio-controls {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.audio-btn {
    background: #005A9C;
    color: white;
    border: none;
    padding: 18px 32px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-width: 140px;
}

.audio-btn:hover {
    background: #004080;
    transform: translateY(-2px);
}

.audio-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
}

.audio-btn.playing {
    background: #EF3E42;
}

.toggle-section {
    text-align: center;
    margin-top: 60px;
}

.toggle-btn {
    background: transparent;
    color: #005A9C;
    border: 2px solid #005A9C;
    padding: 15px 30px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.toggle-btn:hover {
    background: #005A9C;
    color: white;
}

.models-section {
    display: none;
    margin-top: 80px;
}

.models-section.show {
    display: block;
}

.models-header {
    text-align: center;
    margin-bottom: 60px;
}

.models-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #1a1a1a;
    margin-bottom: 15px;
}

.models-header p {
    font-size: 1.2rem;
    color: #666;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.model-card {
    background: #ffffff;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 30px;
    transition: all 0.2s ease;
    text-align: left;
}

.model-card:hover {
    border-color: #005A9C;
    transform: translateY(-2px);
}

.model-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: #005A9C;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.model-explanation {
    font-size: 1rem;
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.model-ipa {
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    color: #EF3E42;
    text-align: center;
    background: #f8f9fa;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-weight: 600;
}

.loading, .error {
    text-align: center;
    font-size: 1.5rem;
    margin-top: 100px;
    color: #666;
}

.error {
    background: #f8f9fa;
    color: #EF3E42;
    padding: 40px;
    border-radius: 12px;
    border: 2px solid #EF3E42;
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 50px;
        min-height: auto;
    }
    
    .question-section {
        padding-right: 0;
        text-align: center;
    }
    
    .main-headline {
        font-size: 3.5rem;
        line-height: 1.1;
    }
    
    .alternating-name {
        min-width: auto;
    }
    
    .name-context {
        font-size: 1.4rem;
        margin-bottom: 20px;
    }
    
    .name-order-indicator {
        font-size: 0.9rem;
        margin-bottom: 25px;
    }
    
    .answer-section {
        padding: 40px 30px;
    }
    
    .answer-label {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }
    
    .final-answer {
        font-size: 2.8rem;
        line-height: 1.1;
    }
    
    .pronunciation-grid {
        gap: 20px;
    }
    
    .pronunciation-item h4 {
        font-size: 1.1rem;
    }
    
    .pronunciation-item .syllable {
        font-size: 1.8rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 30px 20px;
    }
    
    .main-content {
        gap: 40px;
    }
    
    .main-headline {
        font-size: 2.8rem;
        line-height: 1.05;
        margin-bottom: 20px;
    }
    
    .alternating-name {
        margin-top: 10px;
    }
    
    .name-context {
        font-size: 1.2rem;
        margin-bottom: 15px;
        line-height: 1.4;
    }
    
    .name-order-indicator {
        font-size: 0.85rem;
        margin-bottom: 20px;
    }
    
    .hangul-display {
        font-size: 4.5rem;
    }
    
    .answer-section {
        padding: 35px 25px;
    }
    
    .answer-label {
        font-size: 0.85rem;
        margin-bottom: 12px;
    }
    
    .final-answer {
        font-size: 2.2rem;
        line-height: 1.1;
        margin-bottom: 25px;
    }
    
    .pronunciation-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .pronunciation-item h4 {
        font-size: 1rem;
    }
    
    .pronunciation-item .syllable {
        font-size: 1.6rem;
    }
    
    .pronunciation-item .guide {
        font-size: 0.9rem;
    }
    
    .pronunciation-item .explanation {
        font-size: 0.85rem;
    }
    
    .audio-controls {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .audio-btn {
        min-width: 200px;
        font-size: 0.9rem;
        padding: 12px 20px;
    }
    
    .toggle-section {
        padding: 30px 20px;
    }
    
    .toggle-btn {
        font-size: 0.9rem;
        padding: 12px 20px;
    }
    
    .models-grid {
        grid-template-columns: 1fr;
    }
    
    .model-card {
        padding: 20px;
    }
    
    .model-name {
        font-size: 1rem;
    }
    
    .model-explanation {
        font-size: 0.9rem;
    }
    
    .model-ipa {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px 15px;
    }
    
    .main-content {
        gap: 30px;
    }
    
    .main-headline {
        font-size: 2.2rem;
        line-height: 1.05;
        margin-bottom: 15px;
    }
    
    .alternating-name {
        margin-top: 8px;
    }
    
    .name-context {
        font-size: 1rem;
        margin-bottom: 12px;
        line-height: 1.4;
    }
    
    .name-order-indicator {
        font-size: 0.8rem;
        margin-bottom: 15px;
    }
    
    .hangul-display {
        font-size: 3.5rem;
    }
    
    .answer-section {
        padding: 25px 20px;
    }
    
    .answer-label {
        font-size: 0.8rem;
        margin-bottom: 10px;
    }
    
    .final-answer {
        font-size: 1.8rem;
        line-height: 1.1;
        margin-bottom: 20px;
    }
    
    .pronunciation-item h4 {
        font-size: 0.9rem;
    }
    
    .pronunciation-item .syllable {
        font-size: 1.4rem;
    }
    
    .pronunciation-item .guide {
        font-size: 0.85rem;
    }
    
    .pronunciation-item .explanation {
        font-size: 0.8rem;
    }
    
    .audio-btn {
        min-width: 180px;
        font-size: 0.85rem;
        padding: 10px 16px;
    }
    
    .toggle-section {
        padding: 25px 15px;
    }
    
    .toggle-btn {
        font-size: 0.85rem;
        padding: 10px 16px;
    }
    
    .model-card {
        padding: 15px;
    }
    
    .model-name {
        font-size: 0.9rem;
    }
    
    .model-explanation {
        font-size: 0.85rem;
    }
    
    .model-ipa {
        font-size: 0.8rem;
    }
}