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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #0055A4 0%, #EF4135 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    max-width: 600px;
    width: 100%;
    padding: 40px;
}

h1 {
    color: #333;
    margin-bottom: 30px;
    text-align: center;
}

.footer-links {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e9ecef;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

.github-link {
    text-align: center;
}

.github-link a {
    color: #0055A4;
    text-decoration: none;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: color 0.3s;
}

.github-link a:hover {
    color: #003d7a;
    text-decoration: underline;
}

.upload-section {
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    text-align: center;
}

.upload-section.hidden {
    display: none;
}

.change-dictionary-link {
    text-align: center;
}

.change-dictionary-link a {
    color: #0055A4;
    text-decoration: none;
    font-size: 14px;
    cursor: pointer;
    transition: color 0.3s;
}

.change-dictionary-link a:hover {
    color: #003d7a;
    text-decoration: underline;
}

.file-input-wrapper {
    position: relative;
    display: inline-block;
}

input[type="file"] {
    display: none;
}

.file-button {
    background: #0055A4;
    color: white;
    padding: 12px 30px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    display: inline-block;
    transition: background 0.3s;
}

.file-button:hover {
    background: #003d7a;
}

.load-default-btn {
    background: #17a2b8;
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background 0.3s;
}

.load-default-btn:hover {
    background: #138496;
}

.file-name {
    margin-top: 10px;
    color: #666;
    font-size: 14px;
}

.training-section {
    display: none;
}

.training-section.active {
    display: block;
}

.word-display {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.prompt-label {
    font-size: 14px;
    color: #666;
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 10px;
}

.prompt-value {
    font-size: 48px;
    font-weight: bold;
    color: #333;
    margin-top: 10px;
}

.input-section {
    margin-bottom: 30px;
}

.input-group {
    margin-bottom: 20px;
}

.article-input {
    max-width: 100px;
}

.input-group label {
    display: block;
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
    font-weight: 600;
    text-transform: capitalize;
}

.answer-input {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    transition: border-color 0.3s;
}

.answer-input:focus {
    outline: none;
    border-color: #0055A4;
}

.answer-input.correct {
    border-color: #28a745;
    background: #d4edda;
}

.answer-input.wrong {
    border-color: #EF4135;
    background: #f8d7da;
}

.answer-feedback {
    margin-top: 8px;
    font-size: 14px;
    min-height: 20px;
}

.answer-feedback.correct {
    color: #28a745;
}

.answer-feedback.wrong {
    color: #EF4135;
}

.action-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 20px;
}

button {
    flex: 1;
    padding: 15px 30px;
    font-size: 18px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s;
}

.check-btn {
    background: #17a2b8;
    color: white;
}

.check-btn:hover {
    background: #138496;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(23, 162, 184, 0.4);
}

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

.correct-btn {
    background: #28a745;
    color: white;
}

.correct-btn:hover {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.4);
}

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

.wrong-btn {
    background: #EF4135;
    color: white;
}

.wrong-btn:hover {
    background: #d32f2f;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 65, 53, 0.4);
}

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

.stats {
    margin-top: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    text-align: center;
}

.stats-row {
    display: flex;
    justify-content: space-around;
    margin-top: 10px;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 24px;
    font-weight: bold;
    color: #0055A4;
}

.stat-label {
    font-size: 12px;
    color: #666;
    text-transform: uppercase;
}

.download-btn {
    margin-top: 20px;
    width: 100%;
    background: #ffc107;
    color: #333;
}

.download-btn:hover {
    background: #e0a800;
}

.google-drive-section {
    margin-top: 20px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    text-align: center;
}

.google-btn {
    background: #4285f4;
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: background 0.3s;
    margin: 0 auto;
}

.google-btn:hover {
    background: #357ae8;
}

.google-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.google-status {
    margin-top: 10px;
    font-size: 14px;
    color: #666;
}

.google-status.success {
    color: #28a745;
}

.google-status.error {
    color: #EF4135;
}

.progress-section {
    margin-top: 20px;
}

.word-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
    min-height: 30px;
}

.word-badge {
    background: #e9ecef;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 14px;
    color: #333;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.word-badge.learned {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.word-badge.learning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.word-badge.learning-progress {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.progress-indicator {
    font-size: 10px;
    font-weight: bold;
}

.ipa-reference {
    margin: 20px 0;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #dee2e6;
}

.ipa-reference h4 {
    color: #0055A4;
    font-size: 16px;
    margin: 0 0 15px 0;
    text-align: center;
}

.ipa-tables {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.ipa-compact-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

.ipa-compact-table th,
.ipa-compact-table td {
    border: 1px solid #dee2e6;
    padding: 4px 6px;
    text-align: center;
}

.ipa-compact-table th {
    background: #e9ecef;
    font-weight: 600;
    color: #0055A4;
}

.ipa-compact-table .base-letter {
    background: #fff3cd;
    font-weight: bold;
    color: #856404;
}

.ipa-compact-table td {
    font-family: 'Arial', sans-serif;
    font-size: 14px;
}

.ipa-compact-table td:empty {
    background: #f8f9fa;
}

/* IPA character cells are clickable for pronunciation tips */
.ipa-compact-table .ipa-char {
    cursor: pointer;
    transition: background-color 0.2s;
}

.ipa-compact-table .ipa-char:hover {
    background-color: #d1ecf1;
}

/* Pronunciation tip popup */
.ipa-tip-popup {
    position: fixed;
    background: #fff;
    border: 2px solid #0055A4;
    border-radius: 8px;
    padding: 10px 15px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    max-width: 300px;
    z-index: 10000;
    font-size: 14px;
    line-height: 1.4;
    cursor: pointer;
}

.ipa-tip-popup strong {
    color: #0055A4;
    font-size: 16px;
}

@media (max-width: 768px) {
    .ipa-tables {
        grid-template-columns: 1fr;
    }

    .ipa-compact-table {
        font-size: 10px;
    }

    .ipa-compact-table td {
        font-size: 12px;
    }

    .ipa-tip-popup {
        max-width: 250px;
        font-size: 12px;
    }
}