/**
 * Kanji Study Styles
 * Stroke order viewer and kanji card components
 */

/* ============================================
   STROKE ORDER VIEWER
   ============================================ */

.stroke-viewer {
    position: relative;
    background: var(--bg-darkest);
    border: var(--border-width) solid var(--border-medium);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.stroke-svg-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: var(--space-md);
}

.stroke-svg-wrapper svg {
    max-width: 100%;
    max-height: 100%;
}

.stroke-controls {
    display: flex;
    gap: var(--space-xs);
    padding: var(--space-sm);
    background: var(--bg-darker);
    border-top: 1px solid var(--border-dark);
    width: 100%;
    justify-content: center;
}

.stroke-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border: 2px solid var(--border-medium);
    color: var(--text-primary);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.stroke-btn:hover {
    background: var(--bg-lighter);
    border-color: var(--accent-info);
}

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

.stroke-count {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    font-family: var(--font-pixel);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    background: var(--bg-darker);
    padding: 2px var(--space-sm);
    border: 1px solid var(--border-dark);
}

.stroke-error {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    text-align: center;
    padding: var(--space-lg);
}

/* ============================================
   KANJI CARD
   ============================================ */

.kanji-card {
    display: flex;
    flex-direction: column;
    background: var(--panel-bg);
    border: var(--border-width) solid var(--panel-border-inner);
    box-shadow: var(--shadow-panel);
    max-width: 500px;
    margin: 0 auto;
}

.kanji-card-main {
    display: flex;
    gap: var(--space-xl);
    padding: var(--space-xl);
}

.kanji-character-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.kanji-character {
    font-family: var(--font-japanese);
    font-size: 120px;
    line-height: 1;
    color: var(--text-japanese);
    text-shadow: 3px 3px 0 var(--border-dark);
}

.kanji-stroke-count {
    font-family: var(--font-pixel);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.kanji-info-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.kanji-meanings {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    font-weight: 500;
}

.kanji-readings {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.kanji-reading-row {
    display: flex;
    align-items: baseline;
    gap: var(--space-md);
}

.kanji-reading-label {
    font-family: var(--font-pixel);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    min-width: 60px;
}

.kanji-reading-value {
    font-family: var(--font-japanese);
    font-size: var(--font-size-jp-sm);
    color: var(--text-secondary);
}

.kanji-reading-value span {
    display: inline-block;
    margin-right: var(--space-sm);
    padding: 2px var(--space-sm);
    background: var(--bg-darker);
    border: 1px solid var(--border-dark);
}

/* ============================================
   KANJI CARD FOOTER (Related Vocab)
   ============================================ */

.kanji-card-footer {
    padding: var(--space-md) var(--space-xl);
    background: var(--bg-darker);
    border-top: var(--border-width) solid var(--border-dark);
}

.kanji-vocab-title {
    font-family: var(--font-pixel);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.kanji-vocab-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.kanji-vocab-item {
    padding: var(--space-xs) var(--space-sm);
    background: var(--panel-bg);
    border: 1px solid var(--border-medium);
    font-family: var(--font-japanese);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.kanji-vocab-item:hover {
    border-color: var(--accent-info);
    color: var(--text-primary);
}

/* ============================================
   KANJI STUDY MODE
   ============================================ */

.kanji-study-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xl);
}

.kanji-study-card {
    width: 100%;
    max-width: 600px;
}

.kanji-study-actions {
    display: flex;
    gap: var(--space-md);
}

/* Flip card variant for kanji */
.kanji-flip-card {
    width: var(--card-width);
    height: var(--card-height);
    perspective: 1000px;
    cursor: pointer;
}

.kanji-flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

.kanji-flip-card.flipped .kanji-flip-card-inner {
    transform: rotateY(180deg);
}

.kanji-flip-front,
.kanji-flip-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    background: var(--panel-bg);
    border: var(--border-width) solid var(--panel-border-inner);
    box-shadow: var(--shadow-panel);
}

.kanji-flip-back {
    transform: rotateY(180deg);
}

.kanji-flip-character {
    font-family: var(--font-japanese);
    font-size: 100px;
    line-height: 1;
    color: var(--text-japanese);
    text-shadow: 3px 3px 0 var(--border-dark);
}

.kanji-flip-meanings {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.kanji-flip-readings {
    font-family: var(--font-japanese);
    font-size: var(--font-size-jp-sm);
    color: var(--text-secondary);
    text-align: center;
}

/* ============================================
   KANJI GRID (Selection / Overview)
   ============================================ */

.kanji-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--space-sm);
}

.kanji-grid-item {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--panel-bg);
    border: var(--border-width) solid var(--panel-border-inner);
    font-family: var(--font-japanese);
    font-size: var(--font-size-jp-lg);
    color: var(--text-japanese);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.kanji-grid-item:hover {
    transform: scale(1.05);
    border-color: var(--accent-info);
    z-index: 1;
}

.kanji-grid-item.mastered {
    border-color: var(--accent-success);
}

.kanji-grid-item.mastered::after {
    content: '✓';
    position: absolute;
    top: 2px;
    right: 4px;
    font-size: var(--font-size-xs);
    color: var(--accent-success);
}

.kanji-grid-item.locked {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ============================================
   KANJI MODAL / POPUP
   ============================================ */

.kanji-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.kanji-modal.active {
    opacity: 1;
    visibility: visible;
}

.kanji-modal-content {
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--panel-bg);
    border: var(--border-width) solid var(--panel-border-inner);
    box-shadow: var(--shadow-panel);
}

.kanji-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-lighter);
    border-bottom: var(--border-width) solid var(--border-dark);
}

.kanji-modal-title {
    font-family: var(--font-pixel);
    font-size: var(--font-size-md);
    color: var(--text-highlight);
}

.kanji-modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    cursor: pointer;
}

.kanji-modal-close:hover {
    color: var(--text-primary);
}

.kanji-modal-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    padding: var(--space-lg);
}

.kanji-modal-main {
    display: flex;
    gap: var(--space-xl);
}

.kanji-modal-character {
    font-family: var(--font-japanese);
    font-size: 100px;
    line-height: 1;
    color: var(--text-japanese);
}

.kanji-modal-info {
    flex: 1;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 600px) {
    .kanji-card-main {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .kanji-character {
        font-size: 80px;
    }
    
    .kanji-reading-row {
        flex-direction: column;
        align-items: center;
        gap: var(--space-xs);
    }
    
    .kanji-modal-main {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .kanji-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
}