:root {
    --bg-dark-main: #111827;
    --bg-dark-card: #1f2937;
    --bg-dark-card-light: #374151;
    --border-dark: #374151;
    --text-light-primary: #f9fafb;
    --text-light-secondary: #9ca3af;
    --accent-primary: #8b5cf6; /* violet */
    --accent-secondary: #3b82f6; /* blue */
    --shadow-color-primary: rgba(139, 92, 246, 0.25);
    --shadow-color-secondary: rgba(59, 130, 246, 0.25);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-dark-main);
    color: var(--text-light-secondary);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-light-primary);
}

.title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    color: var(--text-light-primary);
    text-shadow: 0 0 15px var(--shadow-color-primary);
}

.title i {
    color: var(--accent-primary);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-light-secondary);
    font-weight: 400;
}

.search-section, .options-section, .results-section {
    background: var(--bg-dark-card);
    border-radius: 20px;
    padding: 2.5rem;
    border: 1px solid var(--border-dark);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.search-section:hover, .options-section:hover, .results-section:hover {
    border-color: var(--accent-secondary);
    box-shadow: 0 0 20px var(--shadow-color-secondary);
}

.search-container {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-input {
    flex: 1;
    padding: 1rem 1.5rem;
    background-color: var(--bg-dark-main);
    border: 1px solid var(--border-dark);
    border-radius: 12px;
    font-size: 1rem;
    color: var(--text-light-primary);
    transition: all 0.3s ease;
}

.search-input::placeholder {
    color: var(--text-light-secondary);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--shadow-color-primary);
}

.search-btn, .explain-btn {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-btn:hover, .explain-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-dark);
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 1rem 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-light-secondary);
    position: relative;
    transition: color 0.3s ease;
}

.tab-btn:hover {
    color: var(--text-light-primary);
}

.tab-btn.active {
    color: var(--accent-primary);
    font-weight: 600;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent-primary);
    box-shadow: 0 0 10px var(--shadow-color-primary);
}

.tab-content .tab-pane {
    display: none;
}

.tab-content .tab-pane.active {
    display: block;
}

.search-results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.search-results-header h3 {
    color: var(--text-light-primary);
}

.back-btn-small, .back-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-dark-card-light);
    border: 1px solid var(--border-dark);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-light-primary);
}

.back-btn-small:hover, .back-btn:hover {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
    color: white;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background-color: var(--bg-dark-main);
    border: 1px solid var(--border-dark);
    border-radius: 12px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.project-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2), 0 0 10px var(--shadow-color-primary);
}

.project-card.selected {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2), 0 0 10px var(--shadow-color-primary);
}

.project-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-light-primary);
}

.project-meta {
    font-size: 0.9rem;
    color: var(--text-light-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.project-description {
    font-size: 0.9rem;
    color: var(--text-light-secondary);
    line-height: 1.4;
}

.project-prompt {
    font-size: 0.9rem;
    color: var(--text-light-secondary);
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--border-dark);
}

.project-prompt em {
    font-style: italic;
    color: var(--text-light-primary);
}

.options-section {
    margin-bottom: 2rem;
}

.selected-project {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    border: 1px solid var(--accent-primary);
}

.narrator-selection, .output-selection, .feature-explanation-option {
    margin-bottom: 2rem;
}

.narrator-selection h3, .output-selection h3 {
    margin-bottom: 1rem;
    color: var(--text-light-primary);
}

.narrator-options, .output-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.narrator-option, .output-option {
    cursor: pointer;
}

.narrator-option input, .output-option input {
    display: none;
}

.narrator-card, .output-card {
    border: 1px solid var(--border-dark);
    background-color: var(--bg-dark-main);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.narrator-card:hover, .output-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-secondary);
}

.narrator-option input:checked + .narrator-card,
.output-option input:checked + .output-card {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    box-shadow: 0 0 15px var(--shadow-color-primary);
}

.narrator-icon, .output-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.narrator-card h4, .output-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-light-primary);
}

.narrator-card p, .output-card p {
    color: var(--text-light-secondary);
    font-size: 0.9rem;
}

.checkbox-container {
    display: block;
    position: relative;
    padding-left: 35px;
    margin-bottom: 12px;
    cursor: pointer;
    font-size: 1rem;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    color: var(--text-light-primary);
    font-weight: 500;
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 24px;
    width: 24px;
    background-color: var(--bg-dark-main);
    border-radius: 6px;
    transition: all 0.3s ease;
    border: 1px solid var(--border-dark);
}

.checkbox-container:hover input ~ .checkmark {
    border-color: var(--accent-secondary);
}

.checkbox-container input:checked ~ .checkmark {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    box-shadow: 0 0 10px var(--shadow-color-primary);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

.checkbox-container .checkmark:after {
    left: 8px;
    top: 4px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 3px 3px 0;
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    transform: rotate(45deg);
}

.explain-btn {
    width: 100%;
    padding: 1.5rem;
    font-size: 1.1rem;
}

.results-section {
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-dark);
}

.results-header h3 {
    color: var(--text-light-primary);
    font-size: 1.5rem;
}

.results-content {
    line-height: 1.7;
    color: var(--text-light-secondary);
}

.results-content h4 {
    color: var(--text-light-primary);
    margin: 2rem 0 1rem 0;
}

.results-content p {
    margin-bottom: 1rem;
}

.results-content ul, .results-content ol {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.results-content li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.results-content li:last-child {
    margin-bottom: 0;
}

.results-content .step {
    background: var(--bg-dark-main);
    border-left: 4px solid var(--accent-primary);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.85);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    z-index: 1000;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255,255,255,0.3);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

.flowchart-info {
    font-size: 0.9rem;
    color: var(--text-light-secondary);
    text-align: center;
    margin-bottom: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.5s ease-in-out, margin-bottom 0.5s ease-in-out, opacity 0.5s ease-in-out;
}

.flowchart-toggle:not(.collapsed) + .flowchart-info {
    margin-bottom: 1rem;
    max-height: 50px;
    opacity: 1;
}

.flowchart-container-wrapper {
    margin: 1rem 0;
}

.flowchart-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    margin-bottom: 1rem;
    color: var(--text-light-secondary);
    font-weight: 600;
    transition: color 0.3s ease, background-color 0.3s ease;
    user-select: none;
    padding: 0.5rem;
    border-radius: 8px;
}

.flowchart-toggle:hover {
    color: var(--text-light-primary);
    background-color: var(--bg-dark-card-light);
}

.flowchart-toggle i {
    transition: transform 0.3s ease;
    color: var(--accent-primary);
}

.flowchart-toggle.collapsed i {
    transform: rotate(-90deg);
}

.flowchart-container {
    background: var(--bg-dark-main);
    border: 1px solid var(--border-dark);
    border-radius: 12px;
    padding: 1rem;
    overflow: hidden;
    text-align: center;
    transition: max-height 0.5s ease-in-out, padding 0.5s ease-in-out, border-width 0.5s ease-in-out, min-height 0.5s ease-in-out;
    max-height: 1000px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.flowchart-container.collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    border-top-width: 0;
    border-bottom-width: 0;
    min-height: 0;
}

.flowchart-container.interactive {
    cursor: grab;
}

.flowchart-container.interactive:active {
    cursor: grabbing;
}

.flowchart-container .mermaid {
    display: inline-block;
    width: 100%;
    height: 100%;
}

.flowchart-container .mermaid svg {
    max-width: initial !important;
    display: block;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    touch-action: none;
}

.flowchart-container .mermaid svg text {
    text-anchor: middle !important;
    dominant-baseline: central !important;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.code-stats {
    background: var(--bg-dark-main);
    border: 1px solid var(--border-dark);
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
    font-size: 0.9rem;
}

.code-stats p {
    margin: 0.5rem 0;
    color: var(--text-light-secondary);
}

.code-stats strong {
    color: var(--text-light-primary);
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .title {
        font-size: 2.5rem;
    }

    .search-container {
        flex-direction: column;
    }

    .narrator-options, .output-options {
        grid-template-columns: 1fr;
    }

    .results-header {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
}