/* FlashCards AI - Улучшенные стили
   Исправления:
   - Конфликт hover/zoom
   - Улучшенная читаемость
   - Оптимизация анимаций
*/

/* =========================================
   1. 3D FLIP ANIMATIONS
   ========================================= */

.perspective-1000 {
    perspective: 1000px;
}

.transform-style-3d {
    transform-style: preserve-3d;
}

.backface-hidden {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.rotate-y-180 {
    transform: rotateY(180deg);
}

.card-inner {
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.is-flipped {
    transform: rotateY(180deg);
}

/* =========================================
   2. EXAM MODE
   ========================================= */

.exam-ticket {
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    transform-origin: center center;
    word-wrap: break-word;
}

.exam-ticket.is-flipped {
    transform: rotateY(180deg);
}

/* Hover эффекты ТОЛЬКО для НЕзумнутых карточек */
.perspective-1000:not(.is-zoomed-fixed):hover .exam-ticket { 
    box-shadow: 0 15px 30px -5px rgba(0, 0, 0, 0.15);
    z-index: 10;
}

.perspective-1000:not(.is-zoomed-fixed):hover .exam-ticket.is-flipped { 
    transform: rotateY(180deg);
}

/* Зумнутая карточка: отключаем hover трансформации */
.is-zoomed-fixed .exam-ticket {
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.3) !important;
    transform: none !important;
}

.is-zoomed-fixed .exam-ticket.is-flipped {
    transform: rotateY(180deg) !important;
}

/* Увеличение текста в зуме */
.is-zoomed-fixed .exam-text {
    font-size: 1.35rem !important;
    line-height: 1.65;
}

@media (max-width: 640px) {
    .is-zoomed-fixed .exam-text {
        font-size: 1.15rem !important;
    }
}

/* =========================================
   15. EXAM ZOOM MODAL IMPROVEMENTS
   ========================================= */

/* Улучшенное позиционирование для zoom модалки */
#exam-zoom-overlay .card-inner {
    width: 100%;
    height: 100%;
}

/* Улучшенное центрирование текста в zoom модалке */
#exam-zoom-overlay .custom-scroll {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

#exam-zoom-overlay .markdown-body.text-center {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
}

#exam-zoom-overlay .markdown-body.text-center p {
    margin-left: auto;
    margin-right: auto;
    max-width: 90%;
}

#exam-zoom-overlay .markdown-body.text-center ul,
#exam-zoom-overlay .markdown-body.text-center ol {
    display: inline-block;
    text-align: left;
    margin-left: auto;
    margin-right: auto;
}

/* Улучшенный padding для zoom карточки */
#exam-zoom-overlay .card-inner > div {
    padding: 2rem;
}

@media (max-width: 768px) {
    #exam-zoom-overlay .card-inner > div {
        padding: 1.5rem;
    }
    
    #exam-zoom-overlay .markdown-body {
        font-size: 0.9rem;
    }
}

/* =========================================
   3. SMART TEXT SCROLLING
   ========================================= */

.custom-scroll {
    display: flex;
    flex-direction: column;
    justify-content: flex-start !important; 
    height: 100%;
    overflow-y: auto;
    padding: 0 6px;
}

.custom-scroll p {
    margin-top: auto;
    margin-bottom: auto;
    width: 100%;
}

/* Webkit Scrollbar */
.custom-scroll::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.custom-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.custom-scroll::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 3px;
}

.custom-scroll::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}

/* Firefox Scrollbar */
.custom-scroll {
    scrollbar-width: thin;
    scrollbar-color: #d1d5db transparent;
}

/* =========================================
   4. MARKDOWN STYLING
   ========================================= */

.markdown-body {
    font-size: 0.95rem;
    line-height: 1.7;
    color: #374151;
}

.markdown-body p {
    margin-bottom: 0.85em;
}

.markdown-body p:last-child {
    margin-bottom: 0;
}

.markdown-body strong {
    font-weight: 600;
    color: #4338ca;
}

.markdown-body em {
    font-style: italic;
    color: #6b7280;
}

.markdown-body code {
    background-color: #f3f4f6;
    padding: 0.15rem 0.45rem;
    border-radius: 0.35rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.9em;
    color: #db2777;
    border: 1px solid #e5e7eb;
}

.markdown-body pre {
    background-color: #1f2937;
    color: #f3f4f6;
    padding: 1.1rem;
    border-radius: 0.6rem;
    overflow-x: auto;
    margin: 0.75rem 0;
    font-size: 0.88em;
    line-height: 1.5;
}

.markdown-body pre code {
    background-color: transparent;
    color: inherit;
    border: none;
    padding: 0;
    font-size: 1em;
}

.markdown-body ul, .markdown-body ol {
    margin-left: 1.5em;
    margin-bottom: 0.85em;
}

.markdown-body li {
    margin-bottom: 0.4em;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    font-weight: 700;
    margin-top: 1.2em;
    margin-bottom: 0.6em;
    color: #111827;
}

.markdown-body h1 { font-size: 1.5em; }
.markdown-body h2 { font-size: 1.3em; }
.markdown-body h3 { font-size: 1.15em; }

/* Центрирование текста в markdown для ответов */
.markdown-body.text-center {
    text-align: center;
}

.markdown-body.text-center p,
.markdown-body.text-center ul,
.markdown-body.text-center ol {
    text-align: center;
}

.markdown-body.text-center ul,
.markdown-body.text-center ol {
    display: inline-block;
    text-align: left;
}

/* =========================================
   5. ANIMATIONS
   ========================================= */

.fade-in {
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

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

.animate-scale-in {
    animation: scaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes scaleIn {
    from { 
        opacity: 0; 
        transform: scale(0.95); 
    }
    to { 
        opacity: 1; 
        transform: scale(1); 
    }
}

.animate-slide-up {
    animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes slideUp {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

/* =========================================
   6. TAB NAVIGATION
   ========================================= */

.tab-btn {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    position: relative;
}

.tab-btn.bg-white {
    background-color: #ffffff;
    border-bottom: 3px solid #6366f1;
    border-color: #e0e7ff;
    border-bottom-color: #6366f1;
    box-shadow: 0 4px 15px -3px rgba(99, 102, 241, 0.25), 
                0 2px 4px -1px rgba(0,0,0,0.05);
    transform: translateY(-2px);
    font-weight: 700;
    z-index: 10;
}

.tab-btn:not(.bg-white):hover {
    background-color: rgba(243, 244, 246, 0.8);
    transform: translateY(-1px);
}

/* =========================================
   7. UTILITY CLASSES
   ========================================= */

/* Плавные переходы для всех интерактивных элементов */
button, a, input, textarea, select {
    transition: all 0.2s ease;
}

/* Focus states для accessibility */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid #6366f1;
    outline-offset: 2px;
}

/* Анимация загрузки */
.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Toast уведомления (плавное появление/исчезновение) */
.fixed.bottom-4.right-4 {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* =========================================
   8. RESPONSIVE IMPROVEMENTS
   ========================================= */

/* На мобильных устройствах увеличиваем зоны нажатия */
@media (max-width: 640px) {
    button {
        min-height: 44px;
        min-width: 44px;
    }
    
    .exam-ticket {
        font-size: 0.9rem;
    }
    
    /* Увеличиваем кнопки в exam mode */
    .exam-ticket button {
        padding: 0.5rem 0.75rem;
    }
}

/* На планшетах оптимизируем сетку */
@media (min-width: 768px) and (max-width: 1024px) {
    #examGrid {
        grid-template-columns: repeat(3, 1fr) !important;
    }
}

/* =========================================
   9. PRINT STYLES (бонус)
   ========================================= */

@media print {
    header,
    button,
    .no-print {
        display: none !important;
    }
    
    .card-inner,
    .exam-ticket {
        page-break-inside: avoid;
    }
    
    body {
        background: white !important;
    }
}

/* =========================================
   10. ACCESSIBILITY IMPROVEMENTS
   ========================================= */

/* Уменьшенная анимация для пользователей с vestibular disorders */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .card-inner,
    .exam-ticket {
        transition: none !important;
    }
}

/* =========================================
   14. DARK MODE CUSTOM STYLES
   ========================================= */

/* Markdown body в темной теме */
.dark .markdown-body {
    color: #e5e7eb;
}

.dark .markdown-body strong {
    color: #818cf8;
}

.dark .markdown-body em {
    color: #9ca3af;
}

.dark .markdown-body code {
    background-color: #374151;
    color: #f472b6;
    border-color: #4b5563;
}

.dark .markdown-body pre {
    background-color: #111827;
    color: #f3f4f6;
}

.dark .markdown-body h1,
.dark .markdown-body h2,
.dark .markdown-body h3 {
    color: #f9fafb;
}

/* Scrollbar в темной теме */
.dark .custom-scroll::-webkit-scrollbar-thumb {
    background: #4b5563;
}

.dark .custom-scroll::-webkit-scrollbar-thumb:hover {
    background: #6b7280;
}

.dark .custom-scroll {
    scrollbar-color: #4b5563 transparent;
}

/* Tab navigation в темной теме */
.dark .tab-btn.bg-white {
    background-color: #1f2937;
    border-color: #374151;
    border-bottom-color: #6366f1;
}

.dark .tab-btn:not(.bg-white):hover {
    background-color: rgba(31, 41, 55, 0.8);
}

/* =========================================
   11. PERFORMANCE OPTIMIZATIONS
   ========================================= */

/* Используем GPU acceleration для анимаций */
.card-inner,
.exam-ticket,
.tab-btn,
button {
    will-change: transform;
}

/* Ограничиваем will-change только для активных элементов */
.card-inner:not(:hover),
.exam-ticket:not(:hover) {
    will-change: auto;
}

/* =========================================
   12. FIX: Предотвращаем переполнение текста
   ========================================= */

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.whitespace-pre-wrap {
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* Для длинных слов без пробелов */
.break-words {
    word-break: break-word;
    hyphens: auto;
}

/* =========================================
   13. SEARCH INPUT STYLING
   ========================================= */

#editorSearchInput {
    transition: all 0.2s ease;
}

#editorSearchInput:focus {
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}