:root {
    --primary-color: #6200EE;
    --primary-color-rgb: 98, 0, 238;
    --primary-variant: #3700B3;
    --secondary-color: #03DAC6;
    --background: #FFFFFF;
    --surface: #FFFFFF;
    --error: #B00020;
    --on-primary: #FFFFFF;
    --on-secondary: #000000;
    --on-background: #000000;
    --on-surface: #000000;
    --on-error: #FFFFFF;
    --shadow: rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --elevation-1: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --elevation-2: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
    --elevation-3: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);
}

[data-theme="dark"] {
    --primary-color: #BB86FC;
    --primary-variant: #3700B3;
    --secondary-color: #03DAC6;
    --background: #121212;
    --surface: #1E1E1E;
    --error: #CF6679;
    --on-primary: #000000;
    --on-secondary: #000000;
    --on-background: #FFFFFF;
    --on-surface: #FFFFFF;
    --on-error: #000000;
    --shadow: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--background);
    color: var(--on-background);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Font Family Support */
.font-zen-antique { font-family: 'Zen Antique', 'Noto Sans JP', serif; }
.font-zen-maru-gothic { font-family: 'Zen Maru Gothic', 'Noto Sans JP', sans-serif; }
.font-hannari { font-family: 'Hannari', 'Noto Sans JP', serif; }
.font-kokoro { font-family: 'Kokoro', 'Noto Sans JP', serif; }
.font-hiragino-sans { font-family: 'Hiragino Sans', 'Yu Gothic', 'Meiryo', sans-serif; }
.font-yu-gothic { font-family: 'Yu Gothic', 'Meiryo', sans-serif; }
.font-meiryo { font-family: 'Meiryo', sans-serif; }
.font-ms-gothic { font-family: 'MS Gothic', monospace; }

.app-container {
    max-width: 800px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.app-header {
    background-color: var(--primary-color);
    color: var(--on-primary);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--elevation-1);
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-controls {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--on-primary);
    font-size: 1.2rem;
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.icon-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Widget Controls */
.widget-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    background-color: var(--surface);
    padding: 1rem;
    border-radius: var(--border-radius);
    box-shadow: var(--elevation-1);
}

.widget-controls label {
    font-weight: 500;
}

.widget-controls select {
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    background-color: var(--surface);
    color: var(--on-surface);
    font-family: inherit;
}

/* Kanji Widget Styles */
.kanji-widget {
    background-color: var(--surface);
    border-radius: var(--border-radius);
    box-shadow: var(--elevation-2);
    padding: 2rem;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
    cursor: pointer;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.kanji-widget:hover {
    box-shadow: var(--elevation-3);
    transform: translateY(-2px);
}

.kanji-widget.small-widget {
    min-height: 150px;
}

.kanji-widget.large-widget {
    min-height: 300px;
}

.widget-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--primary-color);
}

.widget-loading i {
    font-size: 2rem;
}

.kanji-character {
    font-size: 4rem;
    font-weight: 300;
    margin-bottom: 1rem;
    color: var(--primary-color);
    transition: transform 0.2s ease;
}

.kanji-meaning {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1rem;
    color: var(--on-surface);
}

.kanji-readings {
    display: flex;
    justify-content: space-around;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.reading-group {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.reading-label {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.reading-value {
    font-size: 1.1rem;
    font-weight: 400;
}

.clickable-reading {
    cursor: pointer;
    transition: color 0.2s ease, background-color 0.2s ease;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    display: inline-block;
    margin: 0.1rem;
}

.clickable-reading:hover {
    color: var(--primary-color);
    background-color: rgba(var(--primary-color-rgb), 0.1);
}

.kanji-examples {
    margin-top: 1rem;
    text-align: left;
}

.kanji-examples h4 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    text-align: center;
}

.example-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    padding: 0.5rem;
    background-color: rgba(var(--primary-color), 0.05);
    border-radius: 8px;
}

.example-word {
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.example-word:hover {
    color: var(--primary-color);
}

.reading-hiragana {
    font-size: 0.8rem;
    color: var(--primary-color);
    opacity: 0.8;
    font-weight: 400;
    margin-top: 0.2rem;
}

.example-meaning {
    color: var(--on-surface);
    opacity: 0.8;
}

.widget-actions {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
}

.master-action-btn {
    background-color: var(--secondary-color) !important;
    color: var(--on-secondary) !important;
}

.master-action-btn:hover {
    background-color: #00BFA5 !important;
}

.action-btn {
    background-color: var(--primary-color);
    color: var(--on-primary);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--elevation-1);
}

.action-btn:hover {
    background-color: var(--primary-variant);
    transform: scale(1.1);
}

.master-btn {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--secondary-color);
    color: var(--on-secondary);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 24px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--elevation-1);
}

.master-btn:hover {
    background-color: #00BFA5;
    transform: translateX(-50%) translateY(-2px);
    box-shadow: var(--elevation-2);
}

/* Progress Section */
.progress-section {
    background-color: var(--surface);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--elevation-1);
}

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

.progress-header h3 {
    color: var(--primary-color);
}

.progress-stats {
    font-size: 0.9rem;
    color: var(--on-surface);
    opacity: 0.8;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: rgba(var(--primary-color), 0.2);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
    width: 0%;
}

/* Recent Section */
.recent-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.recent-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 1rem;
}

.recent-item {
    background-color: var(--surface);
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--elevation-1);
    cursor: pointer;
    transition: all 0.2s ease;
}

.recent-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--elevation-2);
}

.recent-kanji {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.recent-meaning {
    font-size: 0.8rem;
    opacity: 0.8;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--surface);
    margin: 1rem;
    padding: 0;
    border-radius: var(--border-radius);
    box-shadow: var(--elevation-3);
    width: 100%;
    max-width: 500px;
    animation: slideIn 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid rgba(var(--on-surface), 0.1);
}

.modal-header h2 {
    color: var(--primary-color);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--on-surface);
    padding: 0.5rem;
    border-radius: 50%;
}

.close-btn:hover {
    background-color: rgba(var(--on-surface), 0.1);
}

.modal-body {
    padding: 1.5rem;
}

.setting-group {
    margin-bottom: 1.5rem;
}

.setting-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--on-surface);
}

.setting-group select,
.setting-group input[type="checkbox"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid rgba(var(--on-surface), 0.3);
    border-radius: 8px;
    background-color: var(--surface);
    color: var(--on-surface);
    font-family: inherit;
}

.setting-group input[type="checkbox"] {
    width: auto;
    transform: scale(1.2);
}

.reset-btn {
    background-color: var(--error);
    color: var(--on-error);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.reset-btn:hover {
    background-color: #8B0000;
    transform: translateY(-1px);
}

.backup-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.backup-btn {
    background-color: var(--primary-color);
    color: var(--on-primary);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    flex: 1;
    min-width: 120px;
}

.backup-btn:hover {
    background-color: var(--primary-variant);
    transform: translateY(-1px);
}

/* Font size classes */
.font-size-small .kanji-character {
    font-size: 3rem !important;
}

.font-size-small .kanji-meaning {
    font-size: 1.2rem !important;
}

.font-size-small .reading-value {
    font-size: 0.9rem !important;
}

.font-size-medium .kanji-character {
    font-size: 4rem !important;
}

.font-size-medium .kanji-meaning {
    font-size: 1.5rem !important;
}

.font-size-medium .reading-value {
    font-size: 1.1rem !important;
}

.font-size-large .kanji-character {
    font-size: 5rem !important;
}

.font-size-large .kanji-meaning {
    font-size: 1.8rem !important;
}

.font-size-large .reading-value {
    font-size: 1.3rem !important;
}

.font-size-extra-large .kanji-character {
    font-size: 6rem !important;
}

.font-size-extra-large .kanji-meaning {
    font-size: 2rem !important;
}

.font-size-extra-large .reading-value {
    font-size: 1.5rem !important;
}

/* Clickable readings for pronunciation */
.reading-value {
    cursor: pointer;
    transition: color 0.2s ease;
    padding: 0.25rem;
    border-radius: 4px;
}

.reading-value:hover {
    background-color: rgba(var(--primary-color-rgb), 0.1);
    color: var(--primary-color);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--surface);
    color: var(--on-surface);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--elevation-3);
    z-index: 1001;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.toast.show {
    opacity: 1;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

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

.pulse-animation {
    animation: pulse 0.3s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        padding: 1rem;
    }
    
    .kanji-character {
        font-size: 3rem;
    }
    
    .widget-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .progress-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .recent-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
    
    .modal-content {
        margin: 0.5rem;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: 1rem;
    }
    
    .app-header h1 {
        font-size: 1.25rem;
    }
    
    .kanji-character {
        font-size: 2.5rem;
    }
    
    .kanji-readings {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
button:focus,
select:focus,
input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --shadow: rgba(0, 0, 0, 0.5);
    }
    
    .kanji-widget {
        border: 2px solid var(--on-surface);
    }
}