.timeline-section {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(circle at 10% 0%, rgba(83, 227, 216, 0.1), transparent 24%),
        radial-gradient(circle at 88% 14%, rgba(255, 169, 102, 0.1), transparent 26%),
        linear-gradient(180deg, #050505 0%, #080808 52%, #040404 100%);
    color: #ededed;
    z-index: 20;
    box-shadow: 0 -48px 90px rgba(0, 0, 0, 0.62);
}

.timeline-section::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
    background-size: 100% 148px, 148px 100%;
    opacity: 0.14;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.92), transparent 96%);
}

.timeline-shell {
    position: relative;
    z-index: 1;
    isolation: isolate;
}

.timeline-section-header {
    display: grid;
    gap: 1.6rem;
    align-items: end;
    padding: 0 8vw;
    margin-bottom: 2.3rem;
}

.timeline-header-copy {
    max-width: 42rem;
}

.timeline-header-kicker {
    display: block;
    margin-bottom: 1rem;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(111, 238, 226, 0.82);
}

.timeline-section-header h2 {
    font-family: 'Clash Display', sans-serif;
    font-size: clamp(3.2rem, 5vw, 5.5rem);
    font-weight: 600;
    line-height: 0.95;
    letter-spacing: -0.035em;
    color: #f7f4f0;
}

.timeline-section-header p {
    margin-top: 1rem;
    max-width: 38rem;
    font-family: 'Inter', sans-serif;
    font-size: 1.02rem;
    line-height: 1.8;
    color: rgba(237, 237, 237, 0.72);
}

.timeline-header-matrix {
    max-width: 30rem;
    justify-self: end;
}

.timeline-header-card {
    position: relative;
    overflow: hidden;
    padding: 1.15rem 1.2rem 1.15rem 1.25rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025)),
        rgba(8, 8, 8, 0.44);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.03),
        0 18px 40px rgba(0, 0, 0, 0.18);
}

.timeline-header-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(135deg, rgba(255, 169, 102, 0.07), transparent 46%);
}

.timeline-header-card-label {
    display: block;
    margin-bottom: 0.55rem;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.66rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255, 179, 117, 0.9);
}

.timeline-header-card p {
    margin: 0;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    line-height: 1.65;
    color: rgba(237, 237, 237, 0.72);
}

#staircase-content {
    --timeline-rail-y: 1.75rem;
    --timeline-card-offset: 2.95rem;
    position: relative;
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(280px, 320px);
    gap: 1rem;
    align-items: stretch;
    padding: var(--timeline-card-offset) 8vw 1rem;
    overflow-x: auto;
    overflow-y: visible;
    scroll-snap-type: x proximity;
    scroll-padding-inline: 8vw;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

#staircase-content::-webkit-scrollbar {
    display: none;
}

#staircase-content::before {
    content: "";
    position: absolute;
    left: 8vw;
    right: 8vw;
    top: var(--timeline-rail-y);
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.08), rgba(111, 238, 226, 0.42), rgba(255, 255, 255, 0.08));
    opacity: 0.9;
}

.timeline-card {
    position: relative;
    overflow: visible;
    width: 100%;
    min-height: 286px;
    padding: 1.1rem 1.1rem 1.15rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    background:
        radial-gradient(circle at top right, rgba(83, 227, 216, 0.08), transparent 34%),
        radial-gradient(circle at bottom left, rgba(255, 169, 102, 0.08), transparent 36%),
        linear-gradient(180deg, rgba(20, 20, 20, 0.98), rgba(9, 9, 9, 0.98));
    color: #f5f3f0;
    text-align: left;
    display: grid;
    grid-template-rows: auto auto auto 1fr auto;
    gap: 0.72rem;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.03),
        0 20px 44px rgba(0, 0, 0, 0.18);
    transition:
        transform 0.32s cubic-bezier(.22, 1, .36, 1),
        border-color 0.3s ease,
        box-shadow 0.3s ease,
        background 0.3s ease;
    appearance: none;
    scroll-snap-align: start;
}

.timeline-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    background:
        linear-gradient(130deg, rgba(255, 255, 255, 0.04), transparent 34%, transparent 72%, rgba(111, 238, 226, 0.05)),
        linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 24%);
    opacity: 0.85;
}

.timeline-card::after {
    content: "";
    position: absolute;
    inset: auto 1.1rem 1rem 1.1rem;
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(111, 238, 226, 0.36), rgba(255, 255, 255, 0));
    opacity: 0;
    transform: scaleX(0.86);
    transition: opacity 0.28s ease, transform 0.28s ease;
}

.timeline-card-node,
.timeline-card-stem {
    position: absolute;
    pointer-events: none;
}

.timeline-card-node {
    top: calc(var(--timeline-rail-y) - var(--timeline-card-offset) - 0.5rem);
    left: 1.08rem;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid rgba(111, 238, 226, 0.34);
    background: rgba(8, 8, 8, 0.96);
    box-shadow:
        0 0 0 6px rgba(10, 10, 10, 0.7),
        0 0 18px rgba(111, 238, 226, 0.22);
    z-index: 2;
}

.timeline-card-node::after {
    content: "";
    position: absolute;
    inset: 3px;
    border-radius: inherit;
    background: rgba(111, 238, 226, 0.9);
}

.timeline-card-stem {
    top: calc(var(--timeline-rail-y) - var(--timeline-card-offset) + 0.45rem);
    left: 1.58rem;
    width: 1px;
    height: calc(var(--timeline-card-offset) - var(--timeline-rail-y) - 0.1rem);
    background: linear-gradient(180deg, rgba(111, 238, 226, 0.85), rgba(111, 238, 226, 0));
    opacity: 0.72;
    z-index: 1;
}

.timeline-card:hover,
.timeline-card:focus-visible {
    transform: translateY(-6px);
    border-color: rgba(111, 238, 226, 0.28);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.05),
        0 26px 58px rgba(0, 0, 0, 0.28),
        0 0 0 1px rgba(111, 238, 226, 0.08);
}

.timeline-card:hover::after,
.timeline-card:focus-visible::after,
.timeline-card.is-active::after {
    opacity: 1;
    transform: scaleX(1);
}

.timeline-card:focus-visible {
    outline: none;
}

.timeline-card.is-active {
    border-color: rgba(111, 238, 226, 0.32);
    background:
        radial-gradient(circle at top right, rgba(83, 227, 216, 0.13), transparent 36%),
        radial-gradient(circle at bottom left, rgba(255, 169, 102, 0.1), transparent 40%),
        linear-gradient(180deg, rgba(22, 22, 22, 0.98), rgba(10, 10, 10, 0.98));
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.05),
        0 26px 62px rgba(0, 0, 0, 0.28),
        0 0 0 1px rgba(111, 238, 226, 0.11);
}

.timeline-card:hover .timeline-card-node,
.timeline-card:focus-visible .timeline-card-node,
.timeline-card.is-active .timeline-card-node {
    border-color: rgba(111, 238, 226, 0.52);
    box-shadow:
        0 0 0 6px rgba(10, 10, 10, 0.7),
        0 0 22px rgba(111, 238, 226, 0.36);
}

.timeline-card > * {
    position: relative;
    z-index: 1;
}

.timeline-card-chronology {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.timeline-card-index {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    color: rgba(255, 255, 255, 0.28);
}

.timeline-card-year,
.timeline-card-role,
.timeline-card-cta {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    text-transform: uppercase;
}

.timeline-card-year {
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: rgba(255, 179, 117, 0.92);
}

.timeline-card-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: rgba(111, 238, 226, 0.85);
    box-shadow: 0 0 10px rgba(111, 238, 226, 0.24);
}

.timeline-card-role {
    font-size: 0.69rem;
    letter-spacing: 0.1em;
    color: rgba(111, 238, 226, 0.72);
}

.timeline-card-title {
    font-family: 'Clash Display', sans-serif;
    font-size: clamp(2.1rem, 3vw, 3rem);
    font-weight: 600;
    line-height: 0.96;
    letter-spacing: -0.03em;
    color: #f5f3f0;
}

.timeline-card-kicker {
    max-width: 28rem;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    line-height: 1.68;
    color: rgba(237, 237, 237, 0.74);
}

.timeline-card-footer {
    display: grid;
    gap: 0.85rem;
    margin-top: auto;
}

.staircase-tag-strip,
.timeline-detail-chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.timeline-inline-pill,
.timeline-tag-pill {
    display: inline-flex;
    align-items: center;
    min-height: 1.95rem;
    padding: 0.36rem 0.78rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.64rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.68);
    backdrop-filter: blur(12px);
}

.timeline-tag-pill {
    font-size: 0.67rem;
    color: rgba(255, 255, 255, 0.84);
}

.timeline-card-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    width: fit-content;
    padding: 0.55rem 0.82rem;
    border-radius: 999px;
    border: 1px solid rgba(111, 238, 226, 0.18);
    background: rgba(111, 238, 226, 0.07);
    font-size: 0.67rem;
    letter-spacing: 0.1em;
    color: rgba(111, 238, 226, 0.92);
    transition: transform 0.28s ease, background 0.28s ease, border-color 0.28s ease;
}

.timeline-card-cta::after {
    content: "↗";
    font-size: 0.82rem;
    line-height: 1;
}

.timeline-card:hover .timeline-card-cta,
.timeline-card:focus-visible .timeline-card-cta,
.timeline-card.is-active .timeline-card-cta {
    transform: translateX(3px);
    border-color: rgba(111, 238, 226, 0.28);
    background: rgba(111, 238, 226, 0.1);
}

.timeline-drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1200;
    background:
        radial-gradient(circle at 20% 10%, rgba(83, 227, 216, 0.08), transparent 28%),
        linear-gradient(180deg, rgba(3, 3, 3, 0.7), rgba(3, 3, 3, 0.86));
    backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.32s ease, visibility 0.32s ease;
}

.timeline-drawer-backdrop.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.timeline-modal {
    position: fixed;
    inset: 0;
    z-index: 1300;
    display: grid;
    place-items: center;
    padding: 0.9rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.32s ease, visibility 0.32s ease;
}

.timeline-modal.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.timeline-modal-shell {
    position: relative;
    width: min(1540px, calc(100vw - 2rem));
    height: min(91vh, 980px);
    overflow: hidden;
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background:
        radial-gradient(circle at top right, rgba(83, 227, 216, 0.08), transparent 24%),
        radial-gradient(circle at 12% 100%, rgba(255, 169, 102, 0.08), transparent 32%),
        linear-gradient(180deg, rgba(18, 18, 18, 0.98), rgba(8, 8, 8, 0.98));
    box-shadow:
        0 40px 120px rgba(0, 0, 0, 0.58),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.timeline-modal-shell::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: inherit;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.05), transparent 18%, transparent 82%, rgba(111, 238, 226, 0.05)),
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 12%);
}

.timeline-modal-content {
    position: relative;
    z-index: 1;
    height: 100%;
    overflow: auto;
    padding: 2.45rem 2.55rem 2.3rem;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
    scrollbar-gutter: stable;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.18) transparent;
}

.timeline-modal-content::-webkit-scrollbar {
    width: 10px;
}

.timeline-modal-content::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
}

.timeline-close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 3;
    width: 3rem;
    height: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    background: rgba(9, 9, 9, 0.72);
    color: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(16px);
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.28);
    transition: transform 0.28s ease, border-color 0.28s ease, background 0.28s ease;
}

.timeline-close-btn:hover,
.timeline-close-btn:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(111, 238, 226, 0.28);
    background: rgba(13, 13, 13, 0.88);
    outline: none;
}

.timeline-modal-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.18fr) minmax(350px, 0.8fr);
    gap: 2.15rem;
    align-items: start;
}

.timeline-modal-copy,
.timeline-modal-aside {
    display: grid;
    gap: 1.15rem;
}

.timeline-modal-copy {
    padding: 1.45rem 0 0.55rem;
    align-content: start;
}

.timeline-modal-aside {
    position: sticky;
    top: 0;
    align-self: start;
    padding-top: 1.45rem;
}

.timeline-modal-meta,
.timeline-detail-label,
.timeline-insight-label,
.timeline-edu-card .school,
.timeline-nav-direction,
.timeline-detail-position {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    text-transform: uppercase;
}

.timeline-modal-meta {
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: rgba(111, 238, 226, 0.86);
}

.timeline-modal-title {
    max-width: 16ch;
    font-family: 'Clash Display', sans-serif;
    font-size: clamp(4.1rem, 5.9vw, 6.3rem);
    font-weight: 600;
    line-height: 0.95;
    letter-spacing: -0.035em;
    color: #f7f4f0;
}

.timeline-modal-headline {
    max-width: 44rem;
    font-family: 'Inter', sans-serif;
    font-size: 1.3rem;
    line-height: 1.78;
    color: rgba(237, 237, 237, 0.78);
}

.timeline-detail-body {
    display: grid;
    gap: 0.95rem;
    padding: 2rem 2.05rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 26px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.015)),
        rgba(8, 8, 8, 0.48);
}

.timeline-detail-body p {
    margin: 0;
    font-family: 'Inter', sans-serif;
    font-size: 1.22rem;
    line-height: 1.92;
    color: rgba(237, 237, 237, 0.76);
}

.timeline-detail-body p:first-child {
    color: rgba(255, 255, 255, 0.96);
}

.timeline-detail-insights {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
}

.timeline-insight-card,
.timeline-detail-block,
.timeline-detail-callout,
.timeline-nav-btn {
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 22px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02)),
        rgba(8, 8, 8, 0.42);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.timeline-insight-card {
    padding: 1.28rem 1.32rem;
}

.timeline-detail-block,
.timeline-detail-callout {
    padding: 1.25rem 1.3rem;
}

.timeline-detail-label {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: rgba(255, 179, 117, 0.92);
}

.timeline-insight-label {
    display: block;
    margin-bottom: 0.7rem;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    color: rgba(111, 238, 226, 0.88);
}

.timeline-insight-card p,
.timeline-detail-callout p {
    margin: 0;
    font-family: 'Inter', sans-serif;
    font-size: 1.06rem;
    line-height: 1.72;
    color: rgba(237, 237, 237, 0.8);
}

.timeline-modal-image-wrap {
    overflow: hidden;
    min-height: 360px;
    aspect-ratio: 4 / 4.25;
    border-radius: 26px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
}

.timeline-modal-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(1) contrast(1.04);
    transform: scale(1.02);
}

.timeline-detail-edu {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.8rem;
}

.timeline-edu-card {
    padding: 1rem 1.05rem;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.07);
    background: rgba(255, 255, 255, 0.028);
}

.timeline-edu-card .school {
    margin-bottom: 0.55rem;
    font-size: 0.66rem;
    letter-spacing: 0.12em;
    color: rgba(111, 238, 226, 0.88);
}

.timeline-edu-card .degree {
    font-family: 'Inter', sans-serif;
    font-size: 1.03rem;
    line-height: 1.62;
    color: rgba(255, 255, 255, 0.9);
}

.timeline-modal-nav {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 0.8rem;
    align-items: stretch;
    margin-top: 0.2rem;
}

.timeline-nav-btn {
    min-height: 92px;
    padding: 1rem 1.05rem;
    color: #ffffff;
    text-align: left;
    transition: transform 0.28s ease, border-color 0.28s ease, background 0.28s ease;
}

.timeline-nav-btn:hover,
.timeline-nav-btn:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(111, 238, 226, 0.24);
    background:
        linear-gradient(180deg, rgba(111, 238, 226, 0.06), rgba(255, 255, 255, 0.03)),
        rgba(8, 8, 8, 0.42);
    outline: none;
}

.timeline-nav-direction {
    display: block;
    margin-bottom: 0.42rem;
    font-size: 0.66rem;
    letter-spacing: 0.12em;
    color: rgba(111, 238, 226, 0.88);
}

.timeline-nav-title {
    font-family: 'Inter', sans-serif;
    font-size: 1.05rem;
    line-height: 1.58;
    color: rgba(237, 237, 237, 0.9);
}

.timeline-detail-position {
    align-self: center;
    padding: 0 0.35rem;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: rgba(255, 255, 255, 0.5);
}

@media (min-width: 1100px) {
    .timeline-section-header {
        grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.72fr);
        column-gap: 2rem;
    }
}

@media (max-width: 1199px) {
    .timeline-section-header,
    #staircase-content {
        padding-left: 7vw;
        padding-right: 7vw;
    }

    #staircase-content {
        --timeline-card-offset: 2.85rem;
        grid-auto-columns: minmax(280px, 304px);
        scroll-padding-inline: 7vw;
    }

    #staircase-content::before {
        left: 7vw;
        right: 7vw;
    }

    .timeline-modal-shell {
        width: calc(100vw - 1rem);
        height: calc(100vh - 1rem);
    }

    .timeline-modal-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .timeline-modal-aside {
        position: static;
        padding-top: 0;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        align-items: start;
    }

    .timeline-modal-image-wrap {
        aspect-ratio: 16 / 10;
        min-height: 0;
    }
}

@media (max-width: 900px) {
    .timeline-section-header {
        gap: 1.2rem;
    }

    .timeline-header-matrix {
        justify-self: stretch;
        max-width: none;
    }

    #staircase-content {
        --timeline-rail-y: 1.6rem;
        --timeline-card-offset: 2.75rem;
        padding-left: 6vw;
        padding-right: 6vw;
        grid-auto-columns: minmax(260px, 72vw);
        scroll-padding-inline: 6vw;
    }

    #staircase-content::before {
        left: 6vw;
        right: 6vw;
    }

    .timeline-detail-insights {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .timeline-modal {
        padding: 0.55rem;
    }

    .timeline-modal-shell {
        width: calc(100vw - 1.1rem);
        height: calc(100vh - 1.1rem);
        border-radius: 26px;
    }

    .timeline-modal-content {
        padding: 1.65rem;
    }

    .timeline-modal-title {
        max-width: none;
    }

    .timeline-modal-aside {
        grid-template-columns: minmax(0, 1fr);
    }

    .timeline-modal-nav {
        grid-template-columns: minmax(0, 1fr);
    }

    .timeline-detail-position {
        padding: 0.2rem 0;
    }
}

@media (max-width: 768px) {
    .timeline-section-header,
    #staircase-content {
        padding-left: 5vw;
        padding-right: 5vw;
    }

    .timeline-section-header {
        margin-bottom: 1.8rem;
    }

    .timeline-section-header h2 {
        font-size: clamp(2.8rem, 13vw, 4.2rem);
    }

    .timeline-section-header p {
        font-size: 0.96rem;
        line-height: 1.72;
    }

    .timeline-card {
        min-height: 252px;
        padding: 1rem;
        border-radius: 22px;
    }

    /* Vertical stack — no more horizontal scroll */
    #staircase-content {
        grid-auto-flow: row;
        grid-template-columns: 1fr;
        overflow-x: visible;
        scroll-snap-type: none;
        padding-top: 1rem;
        padding-bottom: 3rem;
        gap: 1rem;
    }

    /* Hide the horizontal rail line and node/stem decorations */
    #staircase-content::before { display: none; }
    .timeline-card-node,
    .timeline-card-stem { display: none; }

    .timeline-card-title {
        font-size: clamp(2rem, 10vw, 2.7rem);
    }

    .timeline-card-kicker {
        font-size: 0.94rem;
        line-height: 1.65;
    }

    .timeline-detail-body {
        padding: 1.3rem;
    }

    .timeline-detail-body p,
    .timeline-insight-card p,
    .timeline-detail-callout p,
    .timeline-edu-card .degree {
        font-size: 1rem;
        line-height: 1.74;
    }

    .timeline-detail-insights {
        grid-template-columns: 1fr;
    }

    .timeline-close-btn {
        top: 0.8rem;
        right: 0.8rem;
        width: 2.75rem;
        height: 2.75rem;
    }

    .timeline-modal-copy {
        padding-top: 2.75rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .timeline-card,
    .timeline-card::after,
    .timeline-drawer-backdrop,
    .timeline-modal,
    .timeline-close-btn,
    .timeline-nav-btn,
    .timeline-card-cta {
        transition: none;
    }
}