:root {
    --bg-color: #0d1117;
    --sidebar-bg: #161b22;
    --card-bg: #21262d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --accent-color: #58a6ff;
    --hover-bg: rgba(88, 166, 255, 0.1);
    --border-color: #30363d;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 2rem 0;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 0 1.5rem 2rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: -0.5px;
}

.nav-links {
    list-style: none;
    flex-grow: 1;
}

.nav-item {
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    transition: all var(--transition-speed);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-item:hover {
    background-color: var(--hover-bg);
    color: var(--text-primary);
}

.nav-item.active {
    color: var(--accent-color);
    background-color: var(--hover-bg);
    border-right: 3px solid var(--accent-color);
}

/* Main Content */
.main-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 2rem;
    position: relative;
    scroll-behavior: smooth;
}

section {
    display: none;
    animation: fadeIn 0.4s ease;
}

section.active {
    display: block;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h2 {
    margin-bottom: 2rem;
    font-size: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

/* Dashboard & Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: transform var(--transition-speed);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.card h3 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Visual Assets Section - Optimized for higher density */
.asset-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.asset-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.asset-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.asset-card img {
    width: 100%;
    height: auto;
    display: block;
}

.asset-info {
    padding: 1rem;
}

.asset-info h4 {
    color: var(--accent-color);
    margin-bottom: 0.4rem;
    font-size: 0.95rem;
}

.asset-info p {
    color: var(--text-secondary);
    font-size: 0.8rem;
    line-height: 1.4;
}

/* Landing Video */
.video-container {
    width: 100%;
    max-width: 1000px;
    margin: 2rem 0;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
}

.video-container video {
    width: 100%;
    display: block;
}

.video-instructions {
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-style: italic;
    font-size: 1.1rem;
    padding-left: 1rem;
    border-left: 3px solid var(--accent-color);
}

.details-hint {
    margin-top: 2rem;
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: var(--accent-color);
    color: var(--bg-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 700;
    transition: opacity 0.2s;
}

.details-hint:hover {
    opacity: 0.9;
}

/* Slideshow */
.slideshow-container {
    position: relative;
    max-width: 1000px;
    margin: auto;
    background-color: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
}

.slide {
    display: none;
}

.slide img {
    width: 100%;
    display: block;
}

.prev,
.next {
    cursor: pointer;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: auto;
    padding: 16px;
    color: white;
    font-weight: bold;
    font-size: 18px;
    transition: 0.6s ease;
    border-radius: 0 3px 3px 0;
    user-select: none;
    background-color: rgba(0, 0, 0, 0.3);
}

.next {
    right: 0;
    border-radius: 3px 0 0 3px;
}

.prev:hover,
.next:hover {
    background-color: rgba(0, 0, 0, 0.8);
}

.slide-number {
    color: #f2f2f2;
    font-size: 12px;
    padding: 8px 12px;
    position: absolute;
    top: 0;
    background-color: rgba(0, 0, 0, 0.5);
}

.caption {
    background-color: rgba(0, 0, 0, 0.8);
    color: #f2f2f2;
    font-size: 15px;
    padding: 16px;
    text-align: center;
    border-top: 1px solid var(--border-color);
    width: 100%;
    border-bottom-left-radius: 16px;
    border-bottom-right-radius: 16px;
}

.dots-container {
    text-align: center;
    padding: 1rem;
}

.dot {
    cursor: pointer;
    height: 12px;
    width: 12px;
    margin: 0 4px;
    background-color: #717171;
    border-radius: 50%;
    display: inline-block;
    transition: background-color 0.6s ease;
}

.dot.active,
.dot:hover {
    background-color: var(--accent-color);
}

/* Research Library */
.file-list {
    list-style: none;
}

.file-item {
    background-color: var(--card-bg);
    margin-bottom: 0.75rem;
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.file-item a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.file-item a:hover {
    text-decoration: underline;
}

.file-type {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Lightbox - Final Refined Proportions */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox-overlay.active {
    display: flex;
    opacity: 1;
}

.lightbox-container {
    width: 90vw;
    height: 85vh;
    display: flex;
    background: var(--sidebar-bg);
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.6);
    animation: zoomHighlight 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes zoomHighlight {
    from {
        transform: scale(0.9);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.lightbox-img-wrapper {
    flex: 4;
    /* Increased from 3 to 4 */
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    position: relative;
}

.lightbox-img-wrapper img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 0 40px rgba(88, 166, 255, 0.4);
    /* Enhanced Glow */
    border: 1px solid rgba(88, 166, 255, 0.2);
}

.lightbox-content {
    flex: 1;
    padding: 2rem 1.5rem;
    background: var(--sidebar-bg);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    overflow-y: auto;
}

.lightbox-content h3 {
    color: var(--accent-color);
    margin-bottom: 0.8rem;
    font-size: 1.25rem;
    /* Reduced from 1.4rem */
    line-height: 1.2;
}

.lightbox-content p {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.85rem;
    /* Reduced from 0.95rem */
}

.close-lightbox {
    position: absolute;
    top: 20px;
    right: 20px;
    color: var(--text-secondary);
    font-size: 32px;
    cursor: pointer;
    z-index: 2001;
    transition: color 0.2s, transform 0.2s;
    line-height: 1;
}

.close-lightbox:hover {
    color: var(--text-primary);
    transform: scale(1.1);
}

/* Site disclaimer footer (inside .main-content) */
.site-disclaimer {
  margin-top: 3rem;
  padding: 1.25rem 0 0.5rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--text-secondary);
  max-width: 52rem;
}
.site-disclaimer a {
  color: var(--accent-color);
  text-decoration: underline;
}