.subway-timeline {
    --timeline-bg: linear-gradient(180deg, #ffffff 0%, #ffffff 35%, #ffffff 100%);
    --timeline-rail: #11324d22;
    --timeline-ink: #11253a;
    --timeline-card: #ffffff;
    --timeline-card-border: #d8e5f3;
    --timeline-shadow: #0f274014;
    --timeline-station: #0f2740;
    --timeline-map-gutter: clamp(72px, 16vw, 170px);
    --timeline-line-width: 6;
    --timeline-station-size: 16px;

    margin-top: 1rem;
    padding: 1rem;
    background: var(--timeline-bg);
    color: var(--timeline-ink);
    font-family: "Avenir Next", "Segoe UI", "Trebuchet MS", sans-serif;
}

.subway-timeline__legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-bottom: 0.9rem;
}

.subway-line-chip {
    border-radius: 999px;
    border: 2px solid var(--chip-color);
    color: #0d2236;
    padding: 0.2rem 0.65rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background: #ffffffde;
}

.subway-timeline__canvas {
    position: relative;
    padding: 0.75rem 0;
}

.subway-timeline__map {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: visible;
    pointer-events: none;
}

.subway-timeline__events {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
}

.subway-event {
    min-height: 160px;
    display: grid;
    grid-template-columns: 1fr var(--timeline-map-gutter) 1fr;
    align-items: center;
    position: relative;
    padding: 0.5rem 0;
}

.subway-event__station {
    grid-column: 2;
    justify-self: center;
    width: var(--timeline-station-size);
    height: var(--timeline-station-size);
    border-radius: 999px;
    border: 3px solid var(--timeline-station);
    background: #ffffff;
    box-shadow: 0 0 0 4px #ffffffee;
    z-index: 3;
}

.subway-event__card {
    border: 1px solid var(--timeline-card-border);
    border-radius: 12px;
    background: var(--timeline-card);
    box-shadow: 0 10px 24px var(--timeline-shadow);
    padding: 0.85rem 0.95rem 0.75rem;
    z-index: 2;
}

.subway-event--left .subway-event__card {
    grid-column: 1;
    margin-right: 0.7rem;
}

.subway-event--right .subway-event__card {
    grid-column: 3;
    margin-left: 0.7rem;
}

.subway-event__date {
    margin: 0 0 0.2rem;
    padding: 0;
    color: #355673;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.subway-event__card h3 {
    margin: 0 0 0.35rem;
    font-size: 1rem;
    line-height: 1.3;
}

.subway-event__card p {
    margin: 0;
    padding: 0;
    color: #264663;
    line-height: 1.4;
}

.subway-event__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-top: 0.6rem;
}

.subway-event__tag {
    border-radius: 999px;
    border: 1px solid var(--tag-color);
    color: #123;
    background: #ffffff;
    padding: 0.12rem 0.45rem;
    font-size: 0.67rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.subway-map-line {
    fill: none;
    stroke-width: var(--timeline-line-width);
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0.96;
    filter: drop-shadow(0 2px 4px #0f27402a);
}

.subway-map-station {
    stroke: #ffffff;
    stroke-width: 2;
}

@media (max-width: 780px) {
    .subway-timeline {
        --timeline-map-gutter: 60px;
        --timeline-line-width: 5;
    }

    .subway-event {
        grid-template-columns: var(--timeline-map-gutter) 1fr;
        min-height: 145px;
    }

    .subway-event__station {
        grid-column: 1;
    }

    .subway-event__card,
    .subway-event--left .subway-event__card,
    .subway-event--right .subway-event__card {
        grid-column: 2;
        margin: 0;
    }
}