/* =================================================================
   PDF PRINT MODULE STYLES
   Version 3.1 - November 2025
   ================================================================= */

.module-pdf-print {
    max-width: 900px;
    margin: 0 auto;
}

.pdf-config-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 24px 0;
}

.config-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border-color);
    animation: fadeInUp 0.3s ease;
}

.config-card:nth-child(1) {
    animation-delay: 0s;
}

.config-card:nth-child(2) {
    animation-delay: 0.1s;
}

.config-card:nth-child(3) {
    animation-delay: 0.2s;
}

.config-card:nth-child(4) {
    animation-delay: 0.3s;
}

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

.config-card h3 {
    margin: 0 0 16px 0;
    color: var(--text-primary);
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.config-hint {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 12px;
    background: var(--bg-primary);
    padding: 8px 12px;
    border-radius: 6px;
    border-left: 3px solid var(--primary);
}

/* Format Selection Card */
.format-selection-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border: 2px solid var(--border-color);
}

.config-card.format-selection {
    background: linear-gradient(to bottom right, var(--bg-secondary), var(--bg-primary));
    border: 2px solid var(--primary);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.config-card.format-selection::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.config-card.format-selection h3 {
    color: var(--primary);
    font-size: 20px;
    margin-bottom: 20px;
}

/* Filter Options */
.filter-options {
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-options .radio-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
    padding: 14px 16px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s ease;
    position: relative;
    min-width: 100%;
}

.filter-options .radio-label:hover {
    border-color: var(--primary);
    background: var(--bg-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.filter-options .radio-label input[type="radio"] {
    margin-top: 3px;
    cursor: pointer;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.filter-options .radio-label input[type="radio"]:checked + span {
    color: var(--primary);
    font-weight: 600;
}

.filter-options .radio-label:has(input[type="radio"]:checked) {
    border-color: var(--primary);
    background: var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.format-label-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.format-label-text strong {
    font-size: 15px;
    color: var(--text-primary);
    display: block;
}

.format-label-text small {
    font-size: 13px;
    color: var(--text-secondary);
    display: block;
    line-height: 1.4;
}

.format-icon {
    font-size: 20px;
    color: var(--primary);
    margin-right: 8px;
    min-width: 24px;
    text-align: center;
}

.format-radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    min-width: 180px;
}

.radio-label input[type="radio"] {
    cursor: pointer;
}

/* Preview Count */
.preview-count {
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 16px;
    font-weight: 600;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 2px dashed var(--border-color);
    text-align: center;
}

.preview-count[style*="color: var(--success)"] {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.05);
}

.preview-count[style*="color: var(--error)"] {
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.05);
}

.preview-stats {
    display: flex;
    gap: 40px;
    justify-content: center;
}

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

.stat-number {
    display: block;
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Card Preview Grid */
.card-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    margin: 20px 0;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
    max-height: 500px;
    overflow-y: auto;
}

.preview-card-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: default;
}

.preview-card-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.preview-card-image {
    width: 100%;
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-card-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.preview-card-info {
    padding: 8px;
    text-align: center;
}

.preview-card-word {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.preview-card-lesson {
    font-size: 11px;
    color: var(--text-secondary);
}

.preview-more {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-more-content {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
}

.preview-more-content i {
    font-size: 32px;
    margin-bottom: 8px;
    display: block;
    color: var(--primary);
}

.preview-more-content div {
    font-size: 13px;
    font-weight: 500;
}

.empty-state-small {
    text-align: center;
    color: var(--text-secondary);
}

.empty-state-small i {
    font-size: 32px;
    margin-bottom: 8px;
    opacity: 0.5;
}

/* Print Preview Modal */
.print-preview-modal {
    max-width: 95vw;
    max-height: 95vh;
    width: 1000px;
    display: flex;
    flex-direction: column;
}

.print-preview-modal .modal-header {
    flex-shrink: 0;
}

.print-preview-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px;
    background: var(--bg-secondary);
}

.print-preview-loading .spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 16px;
}

.print-preview-loading p {
    color: var(--text-secondary);
    font-size: 14px;
}

.pdf-preview-frame {
    width: 100%;
    flex: 1;
    border: none;
    background: #525659;
    min-height: 600px;
}

/* Processing Message */
.processing-message {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-primary);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.2);
    text-align: center;
    z-index: 10000;
    backdrop-filter: blur(4px);
}

.processing-message.hidden {
    display: none;
}

.processing-message p {
    margin: 0;
    color: var(--text-primary);
    font-size: 16px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Lesson Range Selector */
.lesson-range {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    background: var(--bg-primary);
    padding: 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.range-separator {
    color: var(--text-secondary);
    font-weight: 600;
}

.lesson-range .select-control {
    flex: 0 0 auto;
    min-width: 120px;
}

/* Generate Button Enhancement */
#generatePDFBtn {
    position: relative;
    overflow: hidden;
}

#generatePDFBtn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

#generatePDFBtn:hover::before {
    width: 300px;
    height: 300px;
}

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

body.mobile-phone .filter-options {
    flex-direction: column;
    align-items: stretch;
}

body.mobile-phone .radio-label {
    min-width: auto;
}

body.mobile-phone .preview-stats {
    gap: 20px;
}

body.mobile-phone .stat-number {
    font-size: 36px;
}

body.mobile-phone .print-preview-modal {
    width: 100%;
    max-width: 100vw;
    max-height: 100vh;
}

body.mobile-phone .pdf-preview-frame {
    min-height: 400px;
}

body.mobile-phone .filter-options .radio-label {
    padding: 12px 14px;
    min-width: 100%;
}

body.mobile-phone .format-label-text strong {
    font-size: 14px;
}

body.mobile-phone .format-label-text small {
    font-size: 12px;
}

body.mobile-phone .format-icon {
    font-size: 18px;
}

body.mobile-phone .config-card.format-selection h3 {
    font-size: 18px;
}

body.mobile-phone .config-card {
    padding: 16px;
}

@media (max-width: 768px) {
    .filter-options {
        flex-direction: column;
        align-items: stretch;
    }
    
    .radio-label {
        min-width: auto;
    }
    
    .preview-stats {
        gap: 20px;
    }
    
    .stat-number {
        font-size: 36px;
    }
    
    .print-preview-modal {
        width: 100%;
        max-width: 100vw;
        max-height: 100vh;
    }
    
    .pdf-preview-frame {
        min-height: 400px;
    }
}

@media (max-width: 480px) {
    .filter-options .radio-label {
        padding: 10px 12px;
    }
    
    .format-label-text strong {
        font-size: 13px;
    }
    
    .format-label-text small {
        font-size: 11px;
        line-height: 1.3;
    }
    
    .config-card {
        padding: 16px;
    }
}

/* Dark mode specific */
[data-theme="dark"] .filter-options .radio-label:has(input[type="radio"]:checked) {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

[data-theme="dark"] .config-hint {
    background: var(--bg-secondary);
    border-left-color: var(--primary);
}

[data-theme="dark"] .lesson-range {
    background: var(--bg-secondary);
}

[data-theme="dark"] .filter-options .radio-label {
    background: var(--bg-secondary);
}

[data-theme="dark"] .filter-options .radio-label:hover {
    background: var(--bg-primary);
}

[data-theme="dark"] .processing-message {
    background: rgba(31, 41, 55, 0.95);
}

@media print {
    .module-pdf-print {
        display: none;
    }
}