:root {
    --primary: #e63946;
    --secondary: #457b9d;
    --background: #f1faee;
    --card-bg: #ffffff;
    --text: #1d3557;
    --text-light: #6c757d;
    --border: #dee2e6;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    padding: 1rem;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1.5rem 0;
    position: relative;
}

.info-btn {
    background: var(--secondary);
    color: white;
    border: none;
    border-radius: 25px;
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.info-btn:hover {
    background: #3a6b8a;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.info-btn:active {
    transform: translateY(0);
}

.custom-mode-indicator {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-block;
    margin-top: 1rem;
    animation: pulse 2s infinite;
}

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

h1 {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
}

.verb-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
    animation: fadeIn 0.3s ease;
}

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

#verb-display {
    font-size: 2.5rem;
    color: var(--secondary);
    text-align: center;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    line-height: 1;
}

#verb-display .infinitive-ending {
    color: #2ecc71;
    font-weight: 700;
    margin-left: 0;
    letter-spacing: 0;
}

.verb-type-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.verb-translation {
    text-align: center;
    color: var(--text-light);
    font-style: italic;
    margin-bottom: 0.5rem;
    font-size: 2rem;
    font-weight: 500;
}

.verb-score-container {
    text-align: center;
    margin-bottom: 1.5rem;
    min-height: 30px;
}

.verb-score {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    background: white;
    border: 2px solid #dee2e6;
}

.verb-score.excellent {
    border-color: #28a745;
    background: #d4edda;
    color: #155724;
}

.verb-score.good {
    border-color: #17a2b8;
    background: #d1ecf1;
    color: #0c5460;
}

.verb-score.fair {
    border-color: #ffc107;
    background: #fff3cd;
    color: #856404;
}

.verb-score.needs-work {
    border-color: #dc3545;
    background: #f8d7da;
    color: #721c24;
}

.verb-score .score-label {
    font-weight: 500;
}

.verb-score .score-value {
    font-size: 1.2rem;
    font-weight: 700;
}

.verb-score .attempts-count {
    font-size: 0.75rem;
    opacity: 0.8;
    font-weight: 400;
}

.no-score {
    color: var(--text-light);
    font-size: 0.85rem;
    font-style: italic;
}

.tense-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.tense-btn {
    flex: 1;
    min-width: 120px;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    background: white;
    border-radius: 10px;
    color: var(--text);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.tense-btn:active {
    transform: scale(0.95);
}

.tense-btn.active {
    background: var(--secondary);
    color: white;
    border-color: var(--secondary);
}

.tense-name {
    font-size: 1rem;
    font-weight: 600;
}

.tense-desc {
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.8;
    font-style: italic;
}

.conjugations {
    margin-bottom: 2rem;
}

.conjugation-header {
    display: grid;
    grid-template-columns: 100px 160px 150px;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--bg);
    border-bottom: 2px solid var(--border);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-light);
}

.conjugation-item {
    border-bottom: 1px solid var(--border);
}

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

.conjugation-row {
    display: grid;
    grid-template-columns: 100px 160px 150px;
    gap: 1rem;
    padding: 1rem;
    font-size: 1.1rem;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.2s;
}

.conjugation-row:hover {
    background-color: var(--bg);
}

.pronoun-english {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
}

.pronoun {
    color: var(--secondary);
    font-weight: 500;
}

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

.form .ending {
    color: var(--primary);
    font-weight: 700;
}

.example {
    display: none;
    flex-direction: column;
    gap: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-light);
    padding: 0.75rem 1rem;
    background-color: #f8f9fa;
    border-top: 1px solid var(--border);
}

.example.visible {
    display: flex;
}

.example-content {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.example-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-shrink: 0;
}

.example-text {
    flex: 1;
}

.speaker-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 0;
    transition: transform 0.2s;
    flex-shrink: 0;
}

.speaker-btn:hover {
    transform: scale(1.2);
}

.speaker-btn:active {
    transform: scale(0.9);
}

.record-btn {
    background: #28a745;
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0.3rem 0.6rem;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
    white-space: nowrap;
}

.record-btn:hover {
    background: #218838;
    transform: scale(1.05);
}

.record-btn:active {
    transform: scale(0.95);
}

.record-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.record-btn.recording {
    background: #dc3545;
    animation: pulse-record 1s infinite;
}

@keyframes pulse-record {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.score-container {
    margin-top: 0.5rem;
}

.score-result {
    background: white;
    border-radius: 8px;
    padding: 0.75rem;
    border-left: 4px solid #6c757d;
}

.score-result.excellent {
    border-left-color: #28a745;
    background: #d4edda;
}

.score-result.good {
    border-left-color: #17a2b8;
    background: #d1ecf1;
}

.score-result.fair {
    border-left-color: #ffc107;
    background: #fff3cd;
}

.score-result.needs-work {
    border-left-color: #dc3545;
    background: #f8d7da;
}

.score-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.score-label {
    font-weight: 600;
    color: var(--text);
}

.score-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.score-details {
    font-size: 0.85rem;
    color: var(--text);
}

.you-said, .target-text {
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.target-text span {
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
    margin: 0 0.1rem;
}

.word-excellent {
    background: #28a745;
    color: white;
    font-weight: 600;
}

.word-good {
    background: #17a2b8;
    color: white;
    font-weight: 600;
}

.word-fair {
    background: #ffc107;
    color: #333;
    font-weight: 600;
}

.word-wrong {
    background: #dc3545;
    color: white;
    font-weight: 600;
}

.score-legend {
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(0,0,0,0.1);
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    font-size: 0.75rem;
    color: var(--text-light);
}

.score-legend span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn-primary {
    width: 100%;
    padding: 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-primary:hover {
    background: #d62839;
}

/* Mobile optimizations */
@media (max-width: 480px) {
    body {
        padding: 0.5rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .verb-card {
        padding: 1rem;
        border-radius: 15px;
    }
    
    #verb-display {
        font-size: 1.75rem;
        gap: 0.5rem;
    }
    
    .verb-type-badge {
        font-size: 0.65rem;
        padding: 0.3rem 0.6rem;
    }
    
    .verb-translation {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }
    
    .verb-score-container {
        margin-bottom: 1rem;
    }
    
    .verb-score {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
        gap: 0.4rem;
    }
    
    .verb-score .score-value {
        font-size: 1rem;
    }
    
    .verb-score .attempts-count {
        font-size: 0.7rem;
    }
    
    .tense-btn {
        min-width: 0;
        padding: 0.6rem 0.5rem;
        gap: 0.2rem;
    }
    
    .tense-name {
        font-size: 0.9rem;
    }
    
    .tense-desc {
        font-size: 0.65rem;
    }
    
    .conjugation-header,
    .conjugation-row {
        grid-template-columns: 60px 100px 90px;
        gap: 0.4rem;
        font-size: 0.85rem;
        padding: 0.6rem 0.4rem;
    }
    
    .conjugation-header {
        font-size: 0.75rem;
    }
    
    .pronoun-english {
        font-size: 0.8rem;
    }
    
    .example {
        font-size: 0.8rem;
        padding: 0.75rem 0.5rem;
        gap: 0.5rem;
    }
    
    .example-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .example-buttons {
        width: 100%;
        justify-content: flex-start;
        gap: 0.75rem;
    }
    
    .speaker-btn {
        font-size: 1.3rem;
        padding: 0.5rem;
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .record-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
        min-height: 44px;
        flex: 1;
    }
    
    .example-text {
        width: 100%;
        line-height: 1.4;
    }
    
    .score-result {
        padding: 0.6rem;
    }
    
    .score-header {
        font-size: 0.9rem;
    }
    
    .score-value {
        font-size: 1.3rem;
    }
    
    .score-details {
        font-size: 0.8rem;
    }
    
    .you-said, .target-text {
        margin-bottom: 0.4rem;
        word-break: break-word;
    }
    
    .score-legend {
        font-size: 0.7rem;
        gap: 0.5rem;
    }
    
    .btn-primary {
        padding: 0.85rem;
        font-size: 1rem;
    }
    
    .info-btn {
        font-size: 0.85rem;
        padding: 0.5rem 1rem;
    }
    
    .modal-content {
        padding: 1.5rem;
        max-height: 85vh;
    }
    
    .modal-content h2 {
        font-size: 1.5rem;
        margin-bottom: 1rem;
        padding-right: 2rem;
    }
    
    .instruction-section {
        padding: 0.75rem;
        margin-bottom: 1rem;
    }
    
    .instruction-section h3 {
        font-size: 1.1rem;
    }
    
    .instruction-section ul {
        margin-left: 1rem;
        line-height: 1.6;
        font-size: 0.9rem;
    }
    
    .color-legend {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .close-modal {
        top: 0.75rem;
        right: 1rem;
        font-size: 1.75rem;
    }
}

/* Tablet optimizations */
@media (min-width: 481px) and (max-width: 768px) {
    .conjugation-header,
    .conjugation-row {
        grid-template-columns: 80px 140px 120px;
        gap: 0.75rem;
    }
    
    .verb-card {
        padding: 1.75rem;
    }
    
    .example-content {
        flex-wrap: wrap;
    }
}
.home-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 4px 6px var(--shadow);
}

.mode-description {
    text-align: center;
    margin-bottom: 2.5rem;
}

.mode-description h2 {
    color: var(--secondary);
    margin-bottom: 0.5rem;
}

.mode-description p {
    color: var(--text-light);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    align-items: center;
    justify-content: center;
    padding: 1rem;
    overflow-y: auto;
}

.modal-content {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideIn 0.3s ease;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 2rem;
    font-weight: bold;
    color: #aaa;
    cursor: pointer;
    transition: color 0.2s;
    line-height: 1;
}

.close-modal:hover {
    color: #333;
}

.modal-content h2 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.instruction-section {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 4px solid var(--secondary);
}

.instruction-section.tip {
    background: #fff3cd;
    border-left-color: #ffc107;
}

.instruction-section h3 {
    color: var(--secondary);
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
}

.instruction-section ul {
    margin-left: 1.5rem;
    line-height: 1.8;
}

.instruction-section li {
    margin-bottom: 0.5rem;
}

.instruction-section strong {
    color: var(--text);
}

.color-legend {
    list-style: none;
    margin-left: 0;
    margin-top: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.color-legend li {
    margin: 0;
}

.legend-excellent,
.legend-good,
.legend-fair,
.legend-wrong {
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.85rem;
}

.legend-excellent {
    background: #28a745;
    color: white;
}

.legend-good {
    background: #17a2b8;
    color: white;
}

.legend-fair {
    background: #ffc107;
    color: #333;
}

.legend-wrong {
    background: #dc3545;
    color: white;
}

#closeModalBtn {
    margin-top: 1rem;
}