/* CSS Variables for consistency and maintainability */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --text-primary: #374151;
    --text-secondary: #6b7280;
    --border-color: #d1d5db;
    --border-light: #e5e7eb;
    --bg-light: #f9fafb;
    --bg-gray: #edf2f7;
    --success-color: #10b981;
    --success-hover: #059669;
    --error-color: #ef4444;
    --border-radius: 0.375rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Loading States Variables */
    --skeleton-base: #f0f0f0;
    --skeleton-highlight: #f8f8f8;
    --loading-duration: 1.5s;
    --transition-duration: 0.2s;
    --spinner-color: var(--primary-color);
    --overlay-bg: rgba(255, 255, 255, 0.9);
    --overlay-bg-dark: rgba(0, 0, 0, 0.5);
    --shimmer-gradient: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
}

body {
    font-family: 'Inter', sans-serif;
    position: relative;
}
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    text-align: center;
}
.video-container {
    margin-bottom: 1rem;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    overflow: hidden; /* To contain rounded corners of video */
}
#myVideo {
    width: auto;
    height: auto;
}
#videoSelect {
    border: 2px solid var(--primary-color);
    background-color: var(--bg-gray);
    padding: var(--spacing-sm);
    font-size: 1rem;
    border-radius: var(--border-radius);
}
.dropdown label {
    font-size: 1.25rem;
    color: var(--primary-color);
    font-weight: 700;
}
#inputVisibility {
    display: none;
}
.input-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}
.input-group label {
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
}
.input-group input, .input-group textarea, .input-group select {
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    width: 100%;
    box-sizing: border-box;
}
.input-group textarea {
    resize: vertical;
    min-height: 4rem;
}
.button {
    padding: var(--spacing-sm) 1.5rem;
    background-color: var(--primary-color);
    color: #fff;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-size: 1rem;
    margin: var(--spacing-sm) 0;
}
.button:hover {
    background-color: var(--primary-hover);
}
.button-secondary {
    background-color: #6c757d;
    color: white;
}

.button-secondary:hover {
    background-color: #5a6268;
}

#message {
    margin-top: 1rem;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    font-weight: 500;
    display: none; /* Hidden by default */
}

/* Message type styling */
.message.success {
    background-color: #d1fae5;
    color: #065f46;
    border: 2px solid #10b981;
    padding: 1rem;
    font-weight: 600;
    display: block;
}

.message.error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 2px solid #ef4444;
    padding: 1rem;
    font-weight: 600;
    display: block;
    font-size: 1rem;
}

.message.warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 2px solid #f59e0b;
    padding: 1rem;
    font-weight: 600;
    display: block;
}

.message.info {
    background-color: #dbeafe;
    color: #1e40af;
    border: 2px solid #3b82f6;
    padding: 1rem;
    font-weight: 600;
    display: block;
}

.video-buttons-container {
    margin: 1.5rem 0;
}

.video-buttons-container h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 600;
}

.video-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.video-button {
    padding: var(--spacing-sm) 1rem;
    background-color: #f3f4f6;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.video-button:hover {
    background-color: #e5e7eb;
    border-color: #9ca3af;
}

.video-button.completed {
    background-color: var(--success-color);
    color: #ffffff;
    border-color: var(--success-color);
}

.video-button.completed:hover {
    background-color: var(--success-hover);
    border-color: var(--success-hover);
}

.video-button.no-onomatopoeia {
    background-color: #f59e0b;
    color: #ffffff;
    border-color: #f59e0b;
}

.video-button.no-onomatopoeia:hover {
    background-color: #d97706;
    border-color: #d97706;
}

/* Active state should always override other states - higher specificity */
.video-button.active,
.video-button.completed.active,
.video-button.no-onomatopoeia.active {
    background-color: var(--primary-color) !important;
    color: #ffffff !important;
    border-color: var(--primary-color) !important;
}

.video-button.active:hover,
.video-button.completed.active:hover,
.video-button.no-onomatopoeia.active:hover {
    background-color: var(--primary-hover) !important;
    border-color: var(--primary-hover) !important;
}

#buttonVisibility {
    text-align: center;
}

#buttonVisibility p {
    margin-bottom: 1rem;
}

.yes-no-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 1rem 0;
}

.yes-no-buttons .button {
    flex: 0 0 auto;
    min-width: 100px;
}

.language-buttons {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.language-button {
    padding: var(--spacing-sm) 1rem;
    background-color: #f3f4f6;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.language-button:hover {
    background-color: #e5e7eb;
    border-color: #9ca3af;
}

.language-button.active {
    background-color: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
}

.language-button.active:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.intro-text {
    text-align: left;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: var(--bg-light);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
}

.intro-text h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.intro-text h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1rem 0 0.5rem 0;
}

.intro-text p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.intro-text ul {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.intro-text li {
    margin-bottom: 0.5rem;
}

.language-selector-container {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1.5rem;
}

.header-controls {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.button-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    margin: 0;
}

.language-dropdown {
    padding: var(--spacing-sm) 0.75rem;
    background-color: #ffffff;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
}

.language-dropdown:hover {
    border-color: var(--primary-color);
}

.language-dropdown:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}
#participantForm {
    margin-top: 2rem;
    padding: 1.5rem;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    background-color: var(--bg-light);
}

#participantForm h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
}

#participantForm label {
    display: block;
    margin-top: 1rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
}

#participantForm input,
#participantForm select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    margin-bottom: 1rem;
    box-sizing: border-box;
}

#participantForm button {
    margin-top: 1.5rem;
}

/* Audio Recording Styles */
.audio-section {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-lg);
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-light);
}

.audio-controls {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin: var(--spacing-md) 0;
}

.audio-button {
    min-width: 120px;
    transition: all 0.3s ease;
}

.audio-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.audio-delete {
    background-color: var(--error-color);
    border-color: var(--error-color);
}

.audio-delete:hover:not(:disabled) {
    background-color: #dc2626;
    border-color: #dc2626;
}

.audio-status {
    text-align: center;
    margin-top: var(--spacing-md);
}

.audio-status p {
    margin: var(--spacing-sm) 0;
    font-weight: 500;
    color: var(--text-secondary);
}

.audio-waveform {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3px;
    height: 30px;
    margin-top: var(--spacing-sm);
}

.wave-bar {
    width: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
}

.wave-bar:nth-child(2) { animation-delay: 0.1s; }
.wave-bar:nth-child(3) { animation-delay: 0.2s; }
.wave-bar:nth-child(4) { animation-delay: 0.3s; }
.wave-bar:nth-child(5) { animation-delay: 0.4s; }

@keyframes wave {
    0%, 40%, 100% {
        height: 5px;
        background-color: var(--border-color);
    }
    20% {
        height: 20px;
        background-color: var(--primary-color);
    }
}

/* Introduction Toggle Styles */
.intro-toggle-section {
    margin: 1.5rem 0;
}

.intro-section {
    overflow: hidden;
    transition: all 0.2s ease-in-out;
    max-height: 0;
    opacity: 0;
}

.intro-section.expanded {
    max-height: 1000px; /* Large enough to accommodate content */
    opacity: 1;
    margin-top: 1rem;
}

.intro-section .intro-text {
    margin-bottom: 0; /* Remove bottom margin when inside toggle */
}

.audio-recording .wave-bar {
    background-color: var(--error-color);
}

.audio-playing .wave-bar {
    background-color: var(--success-color);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    transform: scale(0.7);
    transition: opacity var(--transition-duration) ease, transform var(--transition-duration) ease;
}

.modal-overlay.modal-animating {
    pointer-events: none;
}

/* Modal Sizes */
.modal-small .modal-content {
    max-width: 400px;
}

.modal-medium .modal-content {
    max-width: 600px;
}

.modal-large .modal-content {
    max-width: 800px;
}

.modal-fullscreen .modal-content {
    max-width: 95vw;
    max-height: 95vh;
    width: 95vw;
    height: 95vh;
}

.modal-content {
    background-color: #ffffff;
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow-y: auto;
    outline: none;
}

.modal-title {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    margin-top: 0;
}

.modal-body {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.modal-body p {
    margin-bottom: 1rem;
}

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

.modal-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.modal-buttons .button {
    min-width: 120px;
    margin: 0;
}

/* Close button for modals */
.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.25rem;
    border-radius: 50%;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-duration) ease, color var(--transition-duration) ease;
}

.modal-close:hover {
    background-color: var(--bg-light);
    color: var(--text-primary);
}

/* Modal animations */
@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.7);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes modalFadeOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.7);
    }
}

/* Completion Modal - extends modal styles */
.completion-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.completion-content {
    background: #ffffff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    max-width: 500px;
    width: 90%;
    text-align: center;
    animation: modalFadeIn 0.3s ease-out;
    border: 1px solid #e0e0e0;
}

.completion-content h2 {
    color: #22c55e;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
}

.completion-content p {
    margin-bottom: 1rem;
    line-height: 1.6;
    color: #333333;
}

.completion-content p:last-of-type {
    margin-bottom: 2rem;
    font-style: italic;
    color: #666666;
}

/* Reasoning Page Styles */
.progress-section {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1rem;
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
}

.progress-section h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.progress-section p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.reasoning-section {
    margin-top: 2rem;
}

.reasoning-section h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.onomatopoeia-carousel-container {
    position: relative;
    margin-bottom: 1rem;
    min-height: 40px; /* Ensures consistent height even without arrows */
}

/* SwiperJS Custom Styling */
.onomatopoeia-swiper {
    width: 100%;
    padding: 2rem 0;
}

.onomatopoeia-swiper .swiper-slide {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Custom navigation buttons */
.onomatopoeia-swiper .swiper-button-next,
.onomatopoeia-swiper .swiper-button-prev {
    background-color: var(--primary-color);
    color: #ffffff;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    margin-top: -90px; /* Move buttons higher to avoid blocking textbox */
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.onomatopoeia-swiper .swiper-button-next:after,
.onomatopoeia-swiper .swiper-button-prev:after {
    font-size: 1rem;
    font-weight: bold;
}

.onomatopoeia-swiper .swiper-button-next:hover,
.onomatopoeia-swiper .swiper-button-prev:hover {
    background-color: var(--primary-hover);
    transform: scale(1.05);
}

/* Visual indicator for entries with existing reasoning */
.swiper-slide.has-reasoning .onomatopoeia-item h3 {
    position: relative;
}

.swiper-slide.has-reasoning .onomatopoeia-item h3:after {
    content: "✓";
    position: absolute;
    right: -25px;
    top: 0;
    color: var(--success-color);
    font-size: 1.2em;
    font-weight: bold;
}

.swiper-slide.has-reasoning .onomatopoeia-item {
    border-left: 4px solid var(--success-color);
    padding-left: 1rem;
}

/* Custom pagination */
.onomatopoeia-swiper .swiper-pagination {
    position: static;
    margin-top: 1rem;
}

.onomatopoeia-swiper .swiper-pagination-bullet {
    background-color: var(--primary-color);
    opacity: 0.3;
}

.onomatopoeia-swiper .swiper-pagination-bullet-active {
    opacity: 1;
}

.onomatopoeia-counter {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.onomatopoeia-list {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: opacity 0.2s ease;
}

.reasoning-entry {
    background-color: #ffffff;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.3s ease;
}

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

/* Responsive design */
@media (max-width: 768px) {
    .onomatopoeia-counter {
        font-size: 0.8rem;
    }
}

.onomatopoeia-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.onomatopoeia-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.onomatopoeia-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.time-range {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.audio-icon {
    font-size: 0.875rem;
}

.show-button {
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.show-button:hover {
    background-color: var(--primary-hover);
}

.reasoning-input-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.reasoning-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.reasoning-textarea {
    min-height: 4rem;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    transition: border-color 0.2s ease;
}

.reasoning-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.reasoning-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
}

.save-reasoning-button {
    padding: 0.5rem 1rem;
    background-color: var(--success-color);
    color: #ffffff;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.save-reasoning-button:hover:not(:disabled) {
    background-color: var(--success-hover);
}

.save-reasoning-button:disabled {
    background-color: #9ca3af;
    cursor: not-allowed;
}

.character-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.no-onomatopoeia-message {
    text-align: center;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
}

.no-onomatopoeia-message p {
    color: var(--text-secondary);
    font-style: italic;
}

/* Responsive design for reasoning entries */
@media (max-width: 768px) {
    .onomatopoeia-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .reasoning-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    
    .character-count {
        text-align: center;
    }
}

/* Reasoning Access Button */
.reasoning-access-button {
    background-color: #10b981;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    min-width: 180px;
}

.reasoning-access-button:hover {
    background-color: #059669;
}

/* Loading Utilities */
.hidden {
    display: none !important;
}

.opacity-0 {
    opacity: 0;
}

.opacity-50 {
    opacity: 0.5;
}

.opacity-100 {
    opacity: 1;
}

.pointer-events-none {
    pointer-events: none;
}

/* Loading Spinners */
.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--spinner-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: inline-block;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 1.5px;
}

.spinner-lg {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

.spinner-xl {
    width: 48px;
    height: 48px;
    border-width: 4px;
}

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

/* Button Loading States */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Loading Overlays */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--overlay-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-duration), visibility var(--transition-duration);
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.loading-overlay-dark {
    background: var(--overlay-bg-dark);
    color: white;
}

.loading-overlay-content {
    text-align: center;
    padding: var(--spacing-lg);
}

.loading-overlay-text {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.loading-overlay-dark .loading-overlay-text {
    color: rgba(255, 255, 255, 0.8);
}

/* Global page overlay */
.page-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
}

/* Skeleton Screens */
.skeleton {
    background: var(--skeleton-base);
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
}

.skeleton::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: var(--shimmer-gradient);
    animation: shimmer var(--loading-duration) ease-in-out infinite;
    transform: translateX(-100%);
}

@keyframes shimmer {
    100% {
        transform: translateX(100%);
    }
}

/* Skeleton Components */
.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
}

.skeleton-text:last-child {
    margin-bottom: 0;
}

.skeleton-text-sm {
    height: 0.75rem;
}

.skeleton-text-lg {
    height: 1.25rem;
}

.skeleton-title {
    height: 1.5rem;
    width: 60%;
    margin-bottom: var(--spacing-md);
}

.skeleton-paragraph {
    height: 0.875rem;
    margin-bottom: 0.5rem;
}

.skeleton-paragraph:nth-child(odd) {
    width: 95%;
}

.skeleton-paragraph:nth-child(even) {
    width: 80%;
}

.skeleton-button {
    height: 2.5rem;
    width: 120px;
    border-radius: var(--border-radius);
}

.skeleton-circle {
    border-radius: 50%;
}

.skeleton-rounded {
    border-radius: 0.5rem;
}

/* Video Loading States */
.skeleton-video {
    width: 100%;
    height: 300px;
    background: var(--skeleton-base);
    border-radius: var(--border-radius);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.skeleton-video::before {
    content: '▶';
    font-size: 3rem;
    color: var(--text-secondary);
    opacity: 0.3;
}

/* Form Loading States */
.form-loading {
    position: relative;
}

.form-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--overlay-bg);
    z-index: 10;
}

.input-loading {
    background: var(--skeleton-base);
    color: transparent;
    pointer-events: none;
}

/* Progress Indicators */
.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--border-light);
    border-radius: 2px;
    overflow: hidden;
    margin: var(--spacing-sm) 0;
}

.progress-bar-fill {
    height: 100%;
    background: var(--primary-color);
    transition: width var(--transition-duration) ease;
    width: 0%;
}

.progress-bar-indeterminate .progress-bar-fill {
    width: 30%;
    animation: progress-indeterminate 2s ease-in-out infinite;
}

@keyframes progress-indeterminate {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(400%);
    }
}

/* Loading Text Animation */
.loading-dots::after {
    content: '';
    animation: loading-dots 1.5s steps(4, end) infinite;
}

@keyframes loading-dots {
    0%, 20% {
        content: '';
    }
    40% {
        content: '.';
    }
    60% {
        content: '..';
    }
    80%, 100% {
        content: '...';
    }
}

/* Component-specific Skeletons */
.skeleton-card {
    padding: var(--spacing-lg);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.skeleton-list-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

.skeleton-list-item:last-child {
    border-bottom: none;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: var(--spacing-md);
    flex-shrink: 0;
}

.skeleton-content {
    flex: 1;
}

/* Fade transitions for content loading */
.fade-enter {
    opacity: 0;
    transform: translateY(10px);
}

.fade-enter-active {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--transition-duration), transform var(--transition-duration);
}

.fade-exit {
    opacity: 1;
    transform: translateY(0);
}

.fade-exit-active {
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity var(--transition-duration), transform var(--transition-duration);
}

/* Media Queries for Loading States */
@media (max-width: 768px) {
    .loading-overlay-content {
        padding: var(--spacing-md);
    }
    
    .skeleton-video {
        height: 200px;
    }
    
    .skeleton-video::before {
        font-size: 2rem;
    }
}

/* Introduction section styling */
.introduction-section {
    margin: 1rem 0;
}

.introduction-text {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 1rem;
    margin-top: 0.5rem;
    color: #495057;
    line-height: 1.5;
}

/* Slide message styling */
.slide-message {
    padding: 0.75rem;
    margin: 0.5rem 0;
    border-radius: 6px;
    font-weight: 500;
    text-align: center;
}

.slide-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.slide-message.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.slide-message.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Saved reasoning message styling (persistent, no background) */
.slide-message.saved-reasoning {
    background: none;
    color: var(--text-color);
    font-style: italic;
    font-size: 0.9em;
    margin-top: 0.5rem;
    padding: 0.5rem 0;
    border: none;
}

/* Hide audio recording section */
#audioSection {
    display: none !important;
}