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

body {
    font-family: "Arial", sans-serif;
    background: #000;
    color: #fff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
}

.timeline-header {
    margin-bottom: 0.5rem;
}

.about-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto 2rem;
    padding: 0 1rem 1rem;
    display: grid;
    gap: 0.5rem;
}

.about-panel {
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 1rem;
    background: rgb(30, 30, 30);
    padding: 1rem;
}

.about-panel h2 {
    margin-bottom: 0.75rem;
}

.about-panel p {
    color: #ddd;
    line-height: 1.6;
    margin-bottom: 0.9rem;
}

.about-panel p:last-child {
    margin-bottom: 0;
}

.intro-timeline-layout {
    display: grid;
    gap: 0.5rem;
}

.intro-title-card {
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 1rem;
    background: rgba(0, 0, 0, 0.35);
    padding: 1rem;
}

.intro-kicker {
    color: #ffd700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
}

.intro-title-card h2 {
    margin-bottom: 0.5rem;
}

.intro-title-card p {
    color: #fff;
    margin-bottom: 0;
}

.intro-story-cards {
    display: grid;
    gap: 0.5rem;
}

.intro-story-card {
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 1rem;
    background: rgba(0, 0, 0, 0.35);
    padding: 1rem;
}

.intro-story-card h3 {
    margin-bottom: 0.5rem;
}

.intro-story-card p {
    margin-bottom: 0;
}

.references-section {
    margin: 0;
}

.reference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 0.75rem;
}

.reference-card {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 1rem;
    padding: 1rem;
}

.reference-year {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #ffd700;
    margin-bottom: 0.5rem;
}

.reference-list {
    list-style: none;
    display: grid;
    gap: 0.5rem;
}

.reference-list li {
    line-height: 1.45;
    font-size: 0.95rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 0.5rem;
    padding: 0.5rem 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.ref-title {
    font-weight: 700;
    color: #fff;
}

.ref-meta,
.ref-location {
    color: #d1d5db;
}

.ref-collab {
    color: #b2b2b2;
    font-style: italic;
}

.studies-intro {
    margin-bottom: 0.8rem !important;
}

.studies-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.study-card {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 0.9rem;
    padding: 0.85rem;
}

.study-toggle {
    width: 100%;
    border: 0;
    background: transparent;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    text-align: left;
    padding: 0;
}

.study-toggle-label {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0;
}

.study-toggle-arrow {
    width: 1.1rem;
    height: 1.1rem;
    color: #ffd700;
    flex: 0 0 auto;
    transition: transform 0.2s ease;
}

.study-card.open .study-toggle-arrow {
    transform: rotate(180deg);
}

.study-card p {
    margin-bottom: 0.65rem;
    color: #d1d5db;
}

.study-card video {
    width: 100%;
    border-radius: 0.7rem;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: #000;
}

.study-description {
    margin-top: 0.75rem;
    display: grid;
    gap: 0.45rem;
}

.study-description p {
    margin: 0;
    color: #d1d5db;
    font-size: 0.92rem !important;
    line-height: 1.5 !important;
}

.study-answer {
    display: none;
    margin-top: 0.65rem;
}

.study-card.open .study-answer {
    display: block;
}

.collapsible-panel {
    padding: 0.5rem;
}

.panel-toggle {
    width: 100%;
    border: 0;
    background: transparent;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    padding: 0;
    gap: 0.75rem;
}

.panel-toggle-label {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
}

.panel-toggle-arrow {
    width: 1.2rem;
    height: 1.2rem;
    color: #ffd700;
    transition: transform 0.2s ease;
}

.panel-body {
    display: none;
    margin-top: 0.5rem;
}

.collapsible-panel.open .panel-body {
    display: block;
}

.collapsible-panel.open .panel-toggle-arrow {
    transform: rotate(180deg);
}

.faq-list {
    display: grid;
    gap: 0.65rem;
}

.faq-item {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 0.9rem;
    padding: 0.5rem;
}

.faq-toggle {
    width: 100%;
    border: 0;
    background: transparent;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    text-align: left;
    padding: 0;
}

.faq-toggle-label {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.35;
    margin: 0;
}

.faq-toggle h3,
.faq-question {
    margin: 0 !important;
}

.faq-toggle-arrow {
    width: 1.1rem;
    height: 1.1rem;
    color: #ffd700;
    flex: 0 0 auto;
    transition: transform 0.2s ease;
}

.faq-item.open .faq-toggle-arrow {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    margin: 0;
}

.faq-item.open .faq-answer {
    display: block;
}

.faq-item p {
    margin: 0;
    color: #d1d5db;
}

.faq-item video {
    width: 100%;
    border-radius: 0.7rem;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: #000;
    margin: 0.3rem 0 0.65rem;
}

.faq-media-stack {
    display: grid;
    gap: 0.5rem;
}

.highlight {
    color: #ffd700;
    font-weight: 700;
}

@media (max-width: 768px) {
    .about-container {
        gap: 0.65rem;
    }

    .about-panel {
        padding: 1rem;
    }

    .studies-grid {
        grid-template-columns: 1fr;
    }

    .intro-title-card h2 {
        font-size: 1.2rem !important;
        line-height: 1.45 !important;
    }
}