:root {
    --primary: #2c3e50;
    --accent: #3498db;
    --bg: #f4f7f6;
    --card-bg: #ffffff;
    --text: #333;
    --meta: #7f8c8d;
    --border: #e0e0e0;
    --code-bg: rgba(0,0,0,0.05);
}

[data-theme="dark"] {
    --primary: #ecf0f1;
    --accent: #e74c3c;
    --bg: #1a1a1a;
    --card-bg: #2d2d2d;
    --text: #e0e0e0;
    --meta: #95a5a6;
    --border: #404040;
    --code-bg: rgba(255,255,255,0.1);
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* Global Focus Styles */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Skip Link Styles */
.skip-link {
    position: absolute;
    top: -40px;
    left: 1rem;
    background: var(--accent);
    color: white;
    padding: 0.5rem 1rem;
    z-index: 1000;
    text-decoration: none;
    font-weight: bold;
    border-radius: 0 0 6px 6px;
    transition: top 0.2s ease-in-out;
}

.skip-link:focus-visible {
    top: 0;
    outline: 2px solid var(--text);
    outline-offset: 2px;
}

header {
    background: var(--card-bg);
    padding: 1.5rem 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    margin: 0;
    font-size: 1.8rem;
    color: var(--primary);
}

.subtitle {
    margin: 0.2rem 0 0;
    color: var(--meta);
    font-size: 0.9rem;
}

.highlight {
    color: var(--accent);
    font-weight: bold;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background 0.2s;
}

.theme-toggle:hover {
    background: rgba(0,0,0,0.05);
}

[data-theme="dark"] .theme-toggle:hover {
    background: rgba(255,255,255,0.1);
}

main {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

#main-content:focus {
    outline: none;
}

.repo-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    /* Ensure container doesn't constrain content too much */
    min-width: 0;
}

.repo-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 12px rgba(0,0,0,0.1);
}

.repo-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.repo-header h2 {
    margin: 0;
    font-size: 1.25rem;
    line-height: 1.3;
}

.repo-header a {
    text-decoration: none;
    color: var(--primary);
}

.repo-header a:hover {
    color: var(--accent);
}

.repo-meta {
    font-size: 0.85rem;
    color: var(--meta);
    white-space: nowrap;
    margin-left: 1rem;
}

.stars {
    color: #f1c40f;
    font-weight: 600;
}

.repo-description {
    font-size: 0.9rem;
    color: var(--meta);
    margin-bottom: 1rem;
    font-style: italic;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ... existing styles ... */

.changelog-summary {
    font-size: 0.95rem;
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    flex-grow: 1;
}

/* Accordion Styles */
.accordion-section {
    border-bottom: 1px solid var(--border);
    margin-bottom: 0.5rem;
}

.accordion-section:last-child {
    border-bottom: none;
}

.accordion-header {
    cursor: pointer;
    padding: 0.8rem 0.5rem;
    user-select: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    margin: 0; /* Reset default h3 margin */
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.accordion-header:hover {
    background-color: var(--code-bg);
}

.accordion-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--accent);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.accordion-header::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--meta);
    transition: transform 0.3s ease;
    margin-left: 1rem;
}

.accordion-header[aria-expanded="true"]::after {
    transform: rotate(45deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, opacity 0.3s ease-out, padding 0.3s ease;
    opacity: 0;
}

.accordion-content.expanded {
    opacity: 1;
    padding-bottom: 1rem;
    /* Max-height will be set by JS, but give it a safe fallback/initial transition target if needed, 
       though JS scrollHeight is better */
}

/* Code block fixes */
.changelog-summary pre {
    background: var(--code-bg);
    padding: 1rem 3rem 1rem 1rem; /* Added right padding for copy button */
    border-radius: 6px;
    margin: 0.5rem 0;
    overflow-x: auto;
    /* Wrap text to prevent overflow as requested */
    white-space: pre-wrap; 
    word-wrap: break-word;
    max-width: 100%;
    position: relative; /* For copy button positioning */
}

.changelog-summary code {
    background: transparent; /* inherited from pre if inside */
    padding: 0;
    border-radius: 0;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
    color: var(--accent);
    /* Ensure inline code also behaves well */
    white-space: pre-wrap;
    word-break: break-all;
}

/* Copy Button Styles */
.copy-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.2rem 0.5rem;
    font-size: 0.8rem;
    cursor: pointer;
    color: var(--text);
    transition: all 0.2s ease;
    opacity: 0; /* Hidden by default */
}

[data-theme="dark"] .copy-btn {
    background-color: rgba(0, 0, 0, 0.6);
    color: var(--text);
}

.changelog-summary pre:hover .copy-btn,
.copy-btn:focus-visible {
    opacity: 1; /* Show on hover or keyboard focus */
}

.copy-btn:hover {
    background-color: var(--accent);
    color: white;
    border-color: var(--accent);
}

.copy-btn.copied {
    background-color: #27ae60;
    color: white;
    border-color: #27ae60;
}

/* Adjust lists inside summary */
.changelog-summary ul {
    padding-left: 1.2rem;
    margin: 0.5rem 0;
}

.changelog-summary li {
    margin-bottom: 0.5rem;
}


.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 1rem;
    color: var(--meta);
}

.empty-state p {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.sub-text {
    font-size: 0.9rem;
    opacity: 0.8;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--meta);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
    background: var(--card-bg);
}

@media (max-width: 600px) {
    h1 { font-size: 1.5rem; }
    .repo-card { padding: 1rem; }
    .copy-btn { opacity: 1; } /* Always show on mobile since no hover */
}

/* Global Summary Card */
.global-summary-card {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(52, 152, 219, 0.05) 100%);
    border: 1px solid var(--accent);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.1);
}

.global-summary-card h2 {
    margin-top: 0;
    color: var(--accent);
    font-size: 1.8rem;
    border-bottom: 2px solid rgba(52, 152, 219, 0.2);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.global-summary-card h3 {
    margin-top: 1.5rem;
    color: var(--primary);
    font-size: 1.3rem;
}

.ecosystem-overview {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text);
}

[data-theme="dark"] .global-summary-card {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(52, 152, 219, 0.1) 100%);
}

/* Collapsed Ecosystem Summary */
.ecosystem-details {
    margin: 1rem 0;
}

.ecosystem-toggle {
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
    padding: 0.75rem 0.5rem;
    margin: 0 -0.5rem;
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-radius: 6px;
    transition: background-color 0.2s ease;
}

.ecosystem-toggle:hover {
    background-color: var(--code-bg);
}

.ecosystem-toggle::before {
    content: '▶';
    font-size: 0.75rem;
    transition: transform 0.3s ease;
    display: inline-block;
}

details[open] > .ecosystem-toggle::before {
    transform: rotate(90deg);
}

.ecosystem-toggle::-webkit-details-marker {
    display: none;
}

.ecosystem-overview a {
    color: var(--accent);
    text-decoration: underline;
    word-break: break-word;
}

.ecosystem-overview a:hover {
    opacity: 0.8;
}

/* Try It Out — 3 Collapsed Levels */
.try-it-level {
    margin: 0.5rem 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.try-it-level summary {
    cursor: pointer;
    padding: 0.6rem 1rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
    background: var(--code-bg);
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: filter 0.2s ease;
}

.try-it-level summary:hover {
    filter: brightness(0.95);
}

[data-theme="dark"] .try-it-level summary:hover {
    filter: brightness(1.1);
}

.try-it-level summary::-webkit-details-marker {
    display: none;
}

.try-it-level summary::before {
    content: '▶';
    font-size: 0.65rem;
    transition: transform 0.3s ease;
    display: inline-block;
}

.try-it-level[open] > summary::before {
    transform: rotate(90deg);
}

.try-it-level pre {
    margin: 0;
    border-radius: 0;
    border-top: 1px solid var(--border);
}