/* Quiz Whiz - Flashcard Styles | Dedicated styles for flashcards page including card animations, difficulty filters, and study mode interactions */

/* Difficulty Feature Control */
body[data-difficulty-enabled="false"] #difficulty-filter-container {
    display: none;
}

/* Custom Dropdown Styles */
.custom-select {
    position: relative;
    display: inline-block;
    min-width: 180px;
    max-width: 100%;
}

/* Difficulty icon colors - keep these specific to flashcards */
/* Note: These styles are for difficulty icons, not badges */
.difficulty-icon.difficulty-easy {
    color: #10b981 !important;
}

.difficulty-icon.difficulty-medium {
    color: #f59e0b !important;
}

.difficulty-icon.difficulty-hard {
    color: #ef4444 !important;
}

/* Flashcard Styles */
.flashcard-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--surface-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
}

.flashcard-controls select {
    min-width: 150px;
    padding: 0.5rem;
    border-radius: calc(var(--border-radius) / 2);
    border: 1px solid var(--border-color);
    background-color: var(--background-color);
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
}

.flashcard-controls select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(var(--primary-color-rgb), 0.2);
}

.flashcard-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
}

.flashcard {
    perspective: 1000px;
    margin-bottom: 2rem;
    position: relative;
    isolation: isolate;
}

.flashcard-inner {
    position: relative;
    width: 100%;
    height: 400px;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
    cursor: pointer;
    border-radius: var(--border-radius);
    will-change: transform;
}

.flashcard-inner:hover {
    cursor: pointer;
    transform: scale(1.02) translateY(-4px);
}

.flashcard.flipped .flashcard-inner:hover {
    transform: rotateY(180deg) scale(1.02) translateY(-4px);
}

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

/* Enhanced flip button styling */
.flip-button {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: calc(var(--border-radius) / 2);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.flip-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.flip-button:hover::before {
    left: 100%;
}

.flip-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    filter: brightness(1.1);
}

.flip-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Enhanced focus states for accessibility */
.flashcard:focus-within {
    outline: 3px solid var(--primary-color);
    outline-offset: 3px;
    box-shadow: 0 0 0 6px rgba(var(--primary-color-rgb), 0.1);
}

.flashcard-inner:focus {
    outline: none;
}

/* Focus styles for flashcard container when focused via keyboard navigation */
#current-flashcard:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 4px;
    border-radius: var(--border-radius);
}

#flashcard-content:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 4px;
    border-radius: var(--border-radius);
}

.flip-button:focus {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

/* Navigation button enhancements */
.nav-button {
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.nav-button:active {
    transform: translateY(0);
}

.nav-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.nav-button:disabled:hover {
    background: var(--surface-color);
    color: var(--text-primary);
    border-color: var(--border-color);
    transform: none;
    box-shadow: none;
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    background: var(--card-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-heavy);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: stretch;
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    box-sizing: border-box;
    --mouse-x: 50%;
    --mouse-y: 50%;
}

/* Subtle gradient overlay for depth */
.flashcard-front::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 50%);
    pointer-events: none;
    z-index: 1;
}

/* Mouse-following gradient overlay */
.flashcard-front::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
        600px circle at var(--mouse-x) var(--mouse-y),
        rgba(99, 102, 241, 0.15) 0%,
        rgba(139, 92, 246, 0.1) 25%,
        transparent 50%
    );
    opacity: 0;
    transition: opacity 0.4s ease-out;
    pointer-events: none;
    z-index: 1;
}

.flashcard-back::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
        600px circle at var(--mouse-x) var(--mouse-y),
        rgba(255, 255, 255, 0.25) 0%,
        rgba(255, 255, 255, 0.15) 25%,
        rgba(139, 92, 246, 0.1) 40%,
        transparent 60%
    );
    opacity: 0;
    transition: opacity 0.4s ease-out;
    pointer-events: none;
    z-index: 1;
}

.flashcard-inner:hover .flashcard-front::after,
.flashcard-inner:hover .flashcard-back::after {
    opacity: 1;
    transition: opacity 0.2s ease-in;
}

/* Dark theme gradient adjustments */
[data-theme="dark"] .flashcard-front::after {
    background: radial-gradient(
        600px circle at var(--mouse-x) var(--mouse-y),
        rgba(99, 102, 241, 0.25) 0%,
        rgba(139, 92, 246, 0.15) 25%,
        transparent 50%
    );
}

[data-theme="dark"] .flashcard-back::after {
    background: radial-gradient(
        600px circle at var(--mouse-x) var(--mouse-y),
        rgba(255, 255, 255, 0.3) 0%,
        rgba(255, 255, 255, 0.2) 25%,
        rgba(139, 92, 246, 0.15) 40%,
        transparent 60%
    );
}

.flashcard-front:hover,
.flashcard-back:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15), 0 8px 16px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .flashcard-front:hover,
[data-theme="dark"] .flashcard-back:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 8px 16px rgba(0, 0, 0, 0.3);
}

.flashcard-back {
    transform: rotateY(180deg);
    background: 
        linear-gradient(135deg, var(--primary-color), var(--secondary-color)),
        linear-gradient(45deg, rgba(255,255,255,0.1) 0%, transparent 50%, rgba(255,255,255,0.05) 100%);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
}

.flashcard-back::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0) 50%);
    pointer-events: none;
    z-index: 1;
}

.card-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 1rem 0;
}

.flashcard-question,
.flashcard-answer {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem 1rem;
    position: relative;
    z-index: 2;
}

.flashcard-question p,
.flashcard-answer p {
    margin: 0;
    width: 100%;
}

.card-content p,
.flashcard-question,
.flashcard-answer {
    font-size: clamp(2rem, 3vw, 2rem);
    font-weight: 500;
    line-height: 1.6;
    word-wrap: break-word;
    hyphens: auto;
}

/* Flip hint button styling */
.flip-hint {
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    color: rgba(255, 255, 255, 0.8) !important;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.flip-hint:hover {
    background: rgba(255, 255, 255, 0.2) !important;
    color: white !important;
    transform: translateY(-1px);
}

.flashcard-front .flip-hint {
    background: rgba(0, 0, 0, 0.05) !important;
    border: 1px solid rgba(0, 0, 0, 0.1) !important;
    color: var(--text-secondary) !important;
}

.flashcard-front .flip-hint:hover {
    background: rgba(0, 0, 0, 0.1) !important;
    color: var(--text-primary) !important;
}

/* Question and answer specific styling */
.flashcard-question {
    color: var(--text-primary);
}

.flashcard-answer {
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.card-hint {
    margin-top: auto;
    opacity: 0.7;
    font-size: 0.875rem;
    font-weight: 400;
    position: relative;
    z-index: 2;
    transition: opacity 0.3s ease;
}

.card-hint:hover {
    opacity: 1;
}

.flashcard-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1rem 1.5rem;
    background: var(--surface-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.flashcard-navigation:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-1px);
}

.card-counter {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--background-color);
    padding: 0.75rem 1.25rem;
    border-radius: calc(var(--border-radius) / 2);
    border: 1px solid var(--border-color);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.025em;
    transition: all 0.3s ease;
}

.card-counter:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.difficulty-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
    padding: 1.5rem;
    background: var(--surface-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.difficulty-buttons:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-1px);
}

/* Enhanced button spacing for mobile */
@media (max-width: 768px) {
    .flashcard-inner {
        height: 350px;
    }
}

@media (max-width: 480px) {
    .flashcard-inner {
        height: 300px;
    }
    
    .flashcard-front,
    .flashcard-back {
        padding: 1.5rem;
    }
    
    .difficulty-buttons {
        flex-direction: column;
        gap: 0.75rem;
        padding: 1rem;
    }
    
    .flip-button {
        padding: 0.625rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .nav-button {
        padding: 0.625rem 0.875rem;
        font-size: 0.9rem;
    }
}

/* Loading and transition states */
.flashcard.loading {
    opacity: 0.7;
    pointer-events: none;
}

.flashcard.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2rem;
    height: 2rem;
    margin: -1rem 0 0 -1rem;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 10;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Smooth entrance animation */
.flashcard-container {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(2rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Enhanced card flip animation */
.flashcard-inner.flipping {
    animation: flipCard 0.6s ease-in-out;
}

@keyframes flipCard {
    0% {
        transform: rotateY(0deg);
    }
    50% {
        transform: rotateY(90deg) scale(0.95);
    }
    100% {
        transform: rotateY(180deg);
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    .flashcard-inner,
    .flip-button,
    .nav-button,
    .flashcard-navigation,
    .difficulty-buttons,
    .card-counter {
        transition: none;
        animation: none;
    }
    
    .flashcard-container {
        animation: none;
    }
    
    .flip-button::before {
        display: none;
    }
}

/* Hide difficulty buttons when feature is disabled */
body:not([data-difficulty-enabled="true"]) .difficulty-buttons {
    display: none;
}

/* Flashcard Header Styling */
.flashcard-header {
    position: absolute;
    top: 1rem;
    left: 1rem;
    right: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

/* Deck Badge Styling */
.deck-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    background: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 9999px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.deck-badge:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

/* Difficulty Badge Styling */
.difficulty-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: capitalize;
    letter-spacing: 0.025em;
    border-radius: 9999px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: 1px solid transparent;
}

.difficulty-badge:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

/* Difficulty-specific colors */
.difficulty-easy {
    background: var(--success-color);
    color: white;
}

.difficulty-medium {
    background: var(--warning-color);
    color: white;
}

.difficulty-hard {
    background: var(--error-color);
    color: white;
}

/* Dark theme adjustments for badges */
[data-theme="dark"] .deck-badge {
    background: var(--primary-color);
    box-shadow: var(--shadow-medium);
}

[data-theme="dark"] .difficulty-badge {
    box-shadow: var(--shadow-medium);
}

@media (prefers-color-scheme: dark) {
    .deck-badge {
        background: var(--primary-color);
        box-shadow: var(--shadow-medium);
    }
    
    .difficulty-badge {
        box-shadow: var(--shadow-medium);
    }
}

/* Responsive adjustments for smaller screens */
@media (max-width: 768px) {
    .flashcard-header {
        top: 0.75rem;
        left: 0.75rem;
        right: 0.75rem;
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .deck-badge,
    .difficulty-badge {
        font-size: 0.6875rem;
        padding: 0.25rem 0.5rem;
        max-width: 100px;
    }
}

/* Ensure badges don't interfere with card content */
.flashcard-question,
.flashcard-answer {
    margin-top: 3rem;
    padding: 0 1rem;
}

@media (max-width: 768px) {
    .flashcard-question,
    .flashcard-answer {
        margin-top: 4rem;
    }
}

/* Content Management specific flashcard question styling */
.flashcard-question-management {
    color: var(--text-primary);
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    font-weight: 500;
    line-height: 1.6;
    word-wrap: break-word;
    hyphens: auto;
    overflow-wrap: break-word;
    margin-top: 3rem;
    padding: 0 1rem;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    z-index: 2;
}

.flashcard-question-management p {
    margin: 0;
    width: 100%;
}

/* Content Management specific flashcard answer styling */
.flashcard-answer-management {
    color: var(--text-color);
    /* text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3); */
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    font-weight: 500;
    line-height: 1.6;
    word-wrap: break-word;
    hyphens: auto;
    margin-top: 1rem;
    padding: 0 1rem;
    text-align: center;
    align-items: center;
}

.flashcard-answer-management p {
    margin: 0;
    width: 100%;
}

@media (max-width: 768px) {
    .flashcard-question-management,
    .flashcard-answer-management {
        margin-top: 4rem;
    }
}