/* Card Flip Animations */
.flip-card {
    perspective: 1000px;
    width: 100%;
    height: 350px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

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

/* Hover to flip back and forth - ONLY after answer is selected */
.flip-card.answered:hover .flip-card-inner {
    transform: rotateY(0deg);
}

.flip-card.answered.flipped:hover .flip-card-inner {
    transform: rotateY(0deg);
}

.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.flip-card-front {
    background: white;
}

/* Clean text styling like in sample - minimal and elegant */
.flip-card-front .question-text {
    color: #2d3748 !important;
    font-weight: 700 !important;
    font-size: 1.3rem !important;
    text-shadow: 
        0 1px 3px rgba(255, 255, 255, 0.9),
        0 0 10px rgba(255, 255, 255, 0.6);
    background: none !important;
    padding: 0 !important;
    border: none !important;
    margin: 4px 0 2px 0 !important;
}

.flip-card-front .question-subtitle {
    color: #718096 !important;
    font-weight: 500 !important;
    font-size: 1rem !important;
    text-shadow: 
        0 1px 3px rgba(255, 255, 255, 0.9),
        0 0 10px rgba(255, 255, 255, 0.6);
    background: none !important;
    padding: 0 !important;
    border: none !important;
    margin: 0 0 8px 0 !important;
}

.flip-card-front .radio-text {
    color: #2d3748 !important;
    font-weight: 600 !important;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
}

.flip-card-back .country-info-name {
    color: #2d3748 !important;
    font-weight: 700 !important;
    text-shadow: 
        0 1px 3px rgba(255, 255, 255, 0.9),
        0 0 10px rgba(255, 255, 255, 0.6);
    background: none !important;
    padding: 4px 0 !important;
    border: none !important;
}

.flip-card-back .country-info-value,
.flip-card-back .country-info-label {
    color: #2d3748 !important;
    font-weight: 600 !important;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
}

/* Default radio button styling for non-gradient backgrounds */
.flip-card-front .radio-option {
    background: transparent;
    border-radius: 6px;
    margin: 2px;
    padding: 6px 4px;
    border: none;
    transition: all 0.3s ease;
}

.flip-card-front .radio-option:hover {
    background: rgba(58, 122, 204, 0.1);
}

/* Capital→Country mode: White radio buttons on gradient background like Libya sample */
.flip-card-front[style*="background:"] .radio-option {
    background: rgba(255, 255, 255, 0.95) !important;
    border-radius: 8px !important;
    margin: 4px !important;
    padding: 10px 8px !important;
    border: 1px solid rgba(0, 0, 0, 0.1) !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1) !important;
    transition: all 0.3s ease !important;
}

.flip-card-front[style*="background:"] .radio-option:hover {
    background: rgba(255, 255, 255, 1) !important;
    border-color: rgba(0, 0, 0, 0.2) !important;
    transform: translateY(-1px) !important;
}

.flip-card-front[style*="background:"] .radio-text {
    color: #2d3748 !important;
    font-weight: 500 !important;
    text-shadow: none !important;
}

.flip-card-back .country-info-item {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.flip-card-back .answer-status {
    background: rgba(255, 255, 255, 0.2) !important;
    color: #2d3748 !important;
    border: 1px solid rgba(255, 255, 255, 0.3) !important;
    backdrop-filter: blur(10px);
    font-weight: 700 !important;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8) !important;
}

.flip-card-back {
    background: white;
    color: #333;
    transform: rotateY(180deg);
    display: flex;
    flex-direction: column;
    padding: 15px;
    border: 2px solid #333;
    overflow: hidden;
}

.flip-card-back.correct {
    border-color: #48bb78;
    background: linear-gradient(135deg, #f0fff4 0%, #e6fffa 100%);
}

.flip-card-back.incorrect {
    border-color: #f56565;
    background: linear-gradient(135deg, #fff5f5 0%, #fed7d7 100%);
}

.country-info-header {
    text-align: center;
    margin-bottom: 15px;
    padding: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    background: none;
}

.country-info-name {
    font-size: 1.3rem;
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.answer-status {
    font-size: 0.9rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 15px;
    display: inline-block;
}

.answer-status.correct {
    background: #48bb78;
    color: white;
}

.answer-status.incorrect {
    background: #f56565;
    color: white;
}

.country-info-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.country-info-item {
    display: flex;
    align-items: center;
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.7);
    padding: 6px 8px;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
    min-height: 32px;
}

.country-info-icon {
    width: 16px;
    height: 16px;
    margin-right: 8px;
    flex-shrink: 0;
}

.country-info-item:nth-child(1) .country-info-icon {
    color: #e74c3c;
}

.country-info-item:nth-child(2) .country-info-icon {
    color: #f39c12;
}

.country-info-item:nth-child(3) .country-info-icon {
    color: #27ae60;
}

.country-info-item:nth-child(4) .country-info-icon {
    color: #3498db;
}

.country-info-item:nth-child(5) .country-info-icon {
    color: #9b59b6;
}

.country-info-text {
    flex-grow: 1;
    display: flex;
    align-items: center;
    gap: 6px;
}

.country-info-label {
    font-weight: bold;
    font-size: 0.75rem;
    color: #666;
    text-transform: uppercase;
    white-space: nowrap;
}

.country-info-value {
    font-size: 0.85rem;
    color: #333;
    font-weight: 500;
}

/* Success/Error Animations */
@keyframes bounce {
    0%, 20%, 60%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    80% {
        transform: translateY(-5px);
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

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

.correct-animation {
    animation: bounce 0.6s ease-in-out;
}

.incorrect-animation {
    animation: shake 0.6s ease-in-out;
}

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

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

.loading-spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #4facfe;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

/* Slide Transitions */
@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutLeft {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(-100%);
        opacity: 0;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

.slide-in-left {
    animation: slideInLeft 0.5s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.5s ease-out;
}

.slide-out-left {
    animation: slideOutLeft 0.5s ease-out;
}

.slide-out-right {
    animation: slideOutRight 0.5s ease-out;
}

/* Progress Bar Animation */
@keyframes progressFill {
    from {
        width: 0%;
    }
    to {
        width: var(--target-width);
    }
}

.progress-fill.animate {
    animation: progressFill 0.8s ease-out;
}

/* Card Reveal Animation */
@keyframes cardReveal {
    0% {
        transform: scale(0.8) rotateY(-90deg);
        opacity: 0;
    }
    50% {
        transform: scale(1.05) rotateY(0deg);
        opacity: 0.8;
    }
    100% {
        transform: scale(1) rotateY(0deg);
        opacity: 1;
    }
}

.card-reveal {
    animation: cardReveal 0.6s ease-out;
}

/* Stagger Animation for Multiple Cards - 2x2 Grid */
.game-card:nth-child(1) { animation-delay: 0.1s; }
.game-card:nth-child(2) { animation-delay: 0.2s; }
.game-card:nth-child(3) { animation-delay: 0.3s; }
.game-card:nth-child(4) { animation-delay: 0.4s; }

/* Hover Effects */
.interactive-hover {
    transition: all 0.3s ease;
}

.interactive-hover:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* Button Press Animation */
@keyframes buttonPress {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(0.95);
    }
    100% {
        transform: scale(1);
    }
}

.button-press {
    animation: buttonPress 0.2s ease-in-out;
}

/* Score Counter Animation */
@keyframes countUp {
    from {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
        color: #4facfe;
    }
    to {
        transform: scale(1);
    }
}

.score-update {
    animation: countUp 0.5s ease-in-out;
}

/* Celebration Animation */
@keyframes celebrate {
    0%, 100% {
        transform: rotate(0deg) scale(1);
    }
    25% {
        transform: rotate(-5deg) scale(1.1);
    }
    75% {
        transform: rotate(5deg) scale(1.1);
    }
}

.celebrate {
    animation: celebrate 0.8s ease-in-out;
}

/* Clean integration with flag gradients - no heavy backgrounds */
.flip-card-front[style*="background:"] .card-question,
.flip-card-back[style*="background:"] .country-info-header {
    background: none;
    border: none;
    padding: 10px;
    margin: 0;
}

/* Capital→Country mode: Single white box containing both capital name and question */
.flip-card-front[style*="background:"] .card-question {
    background: rgba(255, 255, 255, 0.95) !important;
    border-radius: 12px !important;
    border: 1px solid rgba(0, 0, 0, 0.1) !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15) !important;
    padding: 16px !important;
    margin: 12px !important;
}

.flip-card-front[style*="background:"] .question-text {
    background: none !important;
    color: #2d3748 !important;
    font-weight: 700 !important;
    padding: 0 !important;
    border: none !important;
    text-shadow: none !important;
    margin: 0 0 8px 0 !important;
    display: block !important;
    box-shadow: none !important;
}

.flip-card-front[style*="background:"] .question-subtitle {
    background: none !important;
    color: #718096 !important;
    font-weight: 500 !important;
    padding: 0 !important;
    border: none !important;
    text-shadow: none !important;
    margin: 0 !important;
    display: block !important;
    box-shadow: none !important;
}

/* Capital→Country mode: White background for back of card */
.flip-card-back[style*="background:"] {
    background: white !important;
}

.flip-card-back[style*="background:"] .country-info-name {
    background: none !important;
    color: #2d3748 !important;
    font-weight: 700 !important;
    padding: 0 !important;
    border: none !important;
    text-shadow: none !important;
    margin: 4px 0 !important;
    display: block !important;
    box-shadow: none !important;
}

.flip-card-back[style*="background:"] .answer-status {
    background: rgba(72, 187, 120, 0.1) !important;
    color: #2d3748 !important;
    border: 1px solid rgba(72, 187, 120, 0.3) !important;
    margin: 4px 0 8px 0 !important;
    display: inline-block !important;
    padding: 4px 8px !important;
    border-radius: 4px !important;
    font-size: 0.85rem !important;
    font-weight: 600 !important;
}

/* Responsive Animation Adjustments */
@media (max-width: 768px) {
    .flip-card-inner {
        transition: transform 0.6s;
    }
    
    @keyframes bounce {
        0%, 20%, 60%, 100% {
            transform: translateY(0);
        }
        40% {
            transform: translateY(-5px);
        }
        80% {
            transform: translateY(-2px);
        }
    }
    
    .interactive-hover:hover {
        transform: translateY(-2px) scale(1.01);
    }
}

/* Continent Mode - Clean minimal styling like in sample */
.flip-card-front.continent-mode,
.flip-card-back.continent-mode {
    background: white !important;
    border: 1px solid #e2e8f0 !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1) !important;
}

.continent-mode .question-text {
    color: #2d3748 !important;
    font-weight: 700 !important;
    font-size: 1.4rem !important;
    text-shadow: none !important;
    background: none !important;
    padding: 0 !important;
    border: none !important;
    margin: 4px 0 2px 0 !important;
}

.continent-mode .question-subtitle {
    color: #718096 !important;
    font-weight: 500 !important;
    font-size: 1rem !important;
    text-shadow: none !important;
    background: none !important;
    padding: 0 !important;
    border: none !important;
    margin: 0 0 8px 0 !important;
}

.continent-mode .radio-option {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 6px 4px !important;
    background: transparent !important;
    cursor: pointer;
    transition: all 0.3s ease !important;
    font-size: 0.85rem;
    min-height: 35px !important;
    border-radius: 6px !important;
    width: 100%;
    border: none !important;
    box-shadow: none !important;
    margin: 0 !important;
}

.continent-mode .radio-option:hover {
    background: rgba(58, 122, 204, 0.1) !important;
    border: none !important;
    transform: none !important;
}

.continent-mode .radio-text {
    color: #2d3748 !important;
    font-weight: 500 !important;
    text-shadow: none !important;
    cursor: pointer;
    line-height: 1.3;
    text-align: left;
    word-break: break-word;
    flex-grow: 1;
}

.continent-mode .radio-option input[type="radio"] {
    margin-right: 10px;
    width: 16px;
    height: 16px;
    cursor: pointer;
    flex-shrink: 0;
    margin-left: 0;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .flip-card-inner {
        transition: none;
    }
    
    .interactive-hover:hover {
        transform: none;
    }
}