/**
 * Timeline widget.
 *
 * Layout model: the component writes two custom properties and lets CSS do the
 * rest — `--tl-track` (rail length in px) on `.tl__track`, and `--tl-pos` (the
 * entry's offset along that rail) on each `.tl__event`. Nothing here needs to
 * know which scale produced the number.
 *
 * Style packs are scoped by `[data-style]`, which sits on both the rail and each
 * entry, so a single rail can mix packs per event. Palette comes from
 * css/styles.css; this file adds no new colours of its own.
 */

.tl {
    --tl-height: 800px;
    --tl-card: 260px;
    --lane-accent: var(--acid);
    position: relative;
    margin-top: 26px;
}

/* ── Chrome ─────────────────────────────────────────────────────────────── */

.tl__chrome { display: flex; align-items: end; justify-content: space-between; gap: 26px; margin-bottom: 18px; }
.tl__title { margin: 0; font: 500 clamp(24px, 2.6vw, 34px)/1.05 Georgia, "Times New Roman", serif; letter-spacing: -.03em; }
.tl__tagline { max-width: 52ch; margin: 9px 0 0; color: var(--ink-soft); font-size: 11px; }
.tl__legend { display: flex; flex-wrap: wrap; gap: 6px; }
.tl__legend span { display: flex; align-items: center; gap: 6px; padding: 5px 10px; border: 1px solid var(--line); border-radius: 99px; background: var(--card); font-size: 9px; font-weight: 750; letter-spacing: .04em; text-transform: uppercase; }
.tl__legend i { width: 8px; height: 8px; border-radius: 50%; background: var(--lane-accent); }

/* ── Viewport and rail ──────────────────────────────────────────────────── */

.tl__viewport {
    position: relative;
    overflow: hidden auto;
    border: 1px solid var(--line);
    border-radius: 20px;
    background:
        radial-gradient(circle at 1px 1px, rgba(21, 39, 31, .07) 1px, transparent 0) 0 0 / 22px 22px,
        var(--paper-deep);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .6);
    scroll-behavior: smooth;
}
.tl[data-orientation="horizontal"] .tl__viewport { overflow: auto hidden; }
.tl__viewport:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }
.tl__viewport::-webkit-scrollbar { height: 10px; width: 10px; }
.tl__viewport::-webkit-scrollbar-thumb { border: 3px solid var(--paper-deep); border-radius: 99px; background: rgba(21, 39, 31, .28); }

.tl[data-style="filmstrip"] { --tl-height: 560px; }
.tl[data-style="sticker"] { --tl-height: 360px; }

.tl__track { position: relative; }
.tl[data-orientation="horizontal"] .tl__track { width: var(--tl-track, 100%); height: var(--tl-height); }
.tl[data-orientation="vertical"] .tl__track { width: 100%; height: var(--tl-track, 100%); }

.tl__axis { position: absolute; background: repeating-linear-gradient(90deg, var(--ink) 0 9px, transparent 9px 17px); opacity: .3; }
.tl[data-orientation="horizontal"] .tl__axis { top: 50%; right: 0; left: 0; height: 2px; }
.tl[data-orientation="vertical"] .tl__axis { top: 0; bottom: 0; left: 50%; width: 2px; background: repeating-linear-gradient(180deg, var(--ink) 0 9px, transparent 9px 17px); }

/* Ruler marks and, on ordinal rails, the elapsed time the even spacing hides. */
.tl__tick, .tl__gap { position: absolute; color: var(--ink-soft); font: 750 9px/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; white-space: nowrap; }
.tl[data-orientation="horizontal"] .tl__tick { top: calc(50% + 30px); left: var(--tl-pos); transform: translateX(-50%); }
.tl[data-orientation="vertical"] .tl__tick { top: var(--tl-pos); left: calc(50% + 14px); transform: translateY(-50%); }
.tl__tick::before { content: ""; position: absolute; left: 50%; top: -28px; width: 1px; height: 7px; background: var(--ink); opacity: .4; }
.tl[data-orientation="vertical"] .tl__tick::before { top: 50%; left: -12px; width: 7px; height: 1px; }

.tl__gap { padding: 3px 8px; border-radius: 99px; background: rgba(21, 39, 31, .07); color: var(--ink-soft); font-size: 8px; text-transform: uppercase; }
.tl[data-orientation="horizontal"] .tl__gap { top: calc(50% - 30px); left: var(--tl-pos); transform: translateX(-50%); }
.tl[data-orientation="vertical"] .tl__gap { top: var(--tl-pos); left: calc(50% - 14px); transform: translate(-100%, -50%); }
/* ── An entry ───────────────────────────────────────────────────────────── */

.tl__event { position: absolute; opacity: 0; transition: opacity .42s ease, transform .42s ease; }
.tl__event[data-seen] { opacity: 1; transform: none; }
.tl[data-orientation="horizontal"] .tl__event { top: 50%; left: var(--tl-pos); transform: translateY(10px); }
.tl[data-orientation="vertical"] .tl__event { top: var(--tl-pos); left: 50%; transform: translateX(10px); }

.tl-marker {
    position: absolute;
    display: grid;
    padding: 0;
    place-items: center;
    border: 0;
    background: transparent;
    cursor: pointer;
    transform: translate(-50%, -50%);
}
.tl-marker__dot {
    display: block;
    width: var(--tl-dot, 17px);
    height: var(--tl-dot, 17px);
    border: 2px solid var(--ink);
    border-radius: 50%;
    background: var(--lane-accent);
    box-shadow: 0 0 0 5px var(--paper-deep);
    transition: transform .2s ease, box-shadow .2s ease;
}
.tl__event[data-tier="landmark"] { --tl-dot: 26px; --tl-card: 296px; }
.tl__event[data-tier="major"] { --tl-dot: 21px; --tl-card: 268px; }
.tl__event[data-tier="notable"] { --tl-dot: 16px; --tl-card: 244px; }
.tl__event[data-tier="minor"] { --tl-dot: 12px; --tl-card: 224px; }
.tl__event[data-tier="landmark"] .tl-marker__dot { box-shadow: 0 0 0 5px var(--paper-deep), 0 0 0 7px var(--ink); }

.tl-marker:hover .tl-marker__dot, .tl-marker:focus-visible .tl-marker__dot { transform: scale(1.18); }
.tl-marker__stamp {
    position: absolute;
    color: var(--ink);
    font: 800 10px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
    letter-spacing: .04em;
    white-space: nowrap;
}
.tl[data-orientation="horizontal"] .tl-marker__stamp { top: calc(100% + 9px); left: 50%; transform: translateX(-50%); }
.tl[data-orientation="vertical"] .tl-marker__stamp { top: 50%; left: calc(100% + 12px); transform: translateY(-50%); }

/* The card. Positioned off the marker, so a pack only styles its own inside. */
.tl-card { position: absolute; width: var(--tl-card); transition: transform .22s ease, box-shadow .22s ease; }
.tl[data-orientation="horizontal"] .tl-card { left: 50%; transform: translateX(-50%); }
.tl[data-orientation="horizontal"] .tl__event[data-side="above"] .tl-card { bottom: 48px; }
.tl[data-orientation="horizontal"] .tl__event[data-side="below"] .tl-card { top: 48px; }
.tl[data-orientation="vertical"] .tl-card { top: 50%; }
.tl[data-orientation="vertical"] .tl__event[data-side="above"] .tl-card { right: 34px; transform: translateY(-50%); }
.tl[data-orientation="vertical"] .tl__event[data-side="below"] .tl-card { left: 34px; transform: translateY(-50%); }

/* Full-card click target that keeps the marker as the single tab stop. */
.tl-card__hit { position: absolute; inset: 0; z-index: 2; border: 0; border-radius: inherit; background: transparent; cursor: pointer; }
.tl-card__branch, .tl-card a { position: relative; z-index: 3; }

.tl-card__lane { margin: 0 0 6px; color: var(--ink-soft); font-size: 8px; font-weight: 850; letter-spacing: .15em; text-transform: uppercase; }
.tl-card h3 { margin: 0; font: 500 15px/1.22 Georgia, "Times New Roman", serif; letter-spacing: -.02em; }
.tl-card__byline { margin: 5px 0 0; color: var(--ink-soft); font-size: 9px; font-weight: 700; letter-spacing: .03em; }
.tl-card__summary { margin: 8px 0 0; color: var(--ink-soft); font-size: 10.5px; line-height: 1.5; }
.tl-card__branch {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 11px;
    padding: 6px 11px;
    border: 1px solid var(--ink);
    border-radius: 99px;
    background: var(--acid);
    font-size: 9px;
    font-weight: 800;
    letter-spacing: .04em;
    cursor: pointer;
    transition: .18s ease;
}
.tl-card__branch:hover { background: var(--ink); color: var(--white); }
.tl__event[data-expanded] .tl-card__branch { background: var(--ink); color: var(--white); }
.tl__event[data-expanded] .tl-marker__dot { box-shadow: 0 0 0 5px var(--paper-deep), 0 0 0 8px var(--lane-accent); }

/* ── Media ──────────────────────────────────────────────────────────────── */

.tl-media { position: relative; display: grid; overflow: hidden; place-items: center; background: var(--paper-deep); }
.tl-media img, .tl-media video { width: 100%; height: 100%; object-fit: cover; display: block; }
.tl-media__glyph { font-size: 26px; line-height: 1; }
.tl-media--card { height: 132px; border-radius: 4px; }
.tl-media--strip { height: 84px; border-radius: 3px; }
.tl-media--chip { width: 40px; height: 40px; border-radius: 11px; }
.tl-media--hero { width: 176px; height: 108px; flex: 0 0 176px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); }
.tl-media--hero img { object-fit: contain; }
.tl-media--hero .tl-media__glyph { font-size: 40px; }

@keyframes tl-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-5px); } }
@keyframes tl-pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.045); } }
@keyframes tl-drift { 0%, 100% { transform: translateX(0) rotate(0); } 50% { transform: translateX(4px) rotate(1.6deg); } }
.tl-media--float > * { animation: tl-float 5.5s ease-in-out infinite; }
.tl-media--pulse > * { animation: tl-pulse 4.5s ease-in-out infinite; }
.tl-media--drift > * { animation: tl-drift 7s ease-in-out infinite; }

/* ── Impact meter ───────────────────────────────────────────────────────── */

.tl-meter { position: relative; display: block; height: 6px; margin-top: 11px; border-radius: 99px; background: rgba(21, 39, 31, .1); }
.tl-meter i { display: block; height: 100%; border-radius: 99px; background: var(--lane-accent); }
.tl-meter small { position: absolute; top: -1px; right: 0; color: var(--ink-soft); font: 800 8px/1 ui-monospace, SFMono-Regular, Menlo, monospace; transform: translateY(-100%); }

/* ── Style pack: polaroid ───────────────────────────────────────────────── */

.tl__event[data-style="polaroid"] .tl-card {
    padding: 11px 11px 15px;
    border: 1px solid var(--line);
    border-radius: 5px;
    background: var(--white);
    box-shadow: var(--shadow);
}
.tl[data-orientation="horizontal"] .tl__event[data-style="polaroid"] .tl-card { transform: translateX(-50%) rotate(-1.3deg); }
.tl[data-orientation="horizontal"] .tl__event[data-side="below"][data-style="polaroid"] .tl-card { transform: translateX(-50%) rotate(1.5deg); }
.tl[data-orientation="horizontal"] .tl__event[data-style="polaroid"]:hover .tl-card,
.tl[data-orientation="horizontal"] .tl__event[data-style="polaroid"]:focus-within .tl-card { transform: translateX(-50%) rotate(0) scale(1.03); box-shadow: 0 26px 60px rgba(21, 39, 31, .18); }
.tl__event[data-style="polaroid"] .tl-card__body { padding: 11px 3px 0; }
.tl-card__tape {
    position: absolute;
    z-index: 4;
    top: -9px;
    left: 50%;
    width: 62px;
    height: 19px;
    border: 1px solid rgba(21, 39, 31, .1);
    background: rgba(249, 226, 147, .78);
    transform: translateX(-50%) rotate(-3deg);
}

/* ── Style pack: filmstrip ──────────────────────────────────────────────── */

.tl__event[data-style="filmstrip"] { --tl-card: 236px; }
.tl__event[data-style="filmstrip"][data-tier="minor"] { --tl-card: 210px; }
.tl__event[data-style="filmstrip"] .tl-card {
    padding: 0;
    border-radius: 6px;
    color: var(--white);
    background: var(--ink);
    box-shadow: 0 14px 34px rgba(21, 39, 31, .26);
}
.tl__event[data-style="filmstrip"] .tl-card__body { padding: 12px 13px 15px; }
.tl__event[data-style="filmstrip"] .tl-card h3 { color: var(--white); }
.tl__event[data-style="filmstrip"] .tl-card__byline, .tl__event[data-style="filmstrip"] .tl-card__summary { color: #a9bcb1; }
.tl__event[data-style="filmstrip"] .tl-media { margin: 0 7px; background: #0d1a14; }
.tl__event[data-style="filmstrip"]:hover .tl-card, .tl__event[data-style="filmstrip"]:focus-within .tl-card { transform: translateX(-50%) translateY(-4px); }
.tl-card__perf { display: block; height: 9px; margin: 5px 6px; background: repeating-linear-gradient(90deg, rgba(255, 255, 255, .62) 0 7px, transparent 7px 15px); border-radius: 2px; }

/* ── Style pack: sticker ────────────────────────────────────────────────── */

.tl__event[data-style="sticker"] { --tl-card: 198px; }
.tl__event[data-style="sticker"] .tl-card {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 11px 14px;
    border: 2px solid var(--ink);
    border-radius: 16px;
    background: var(--card);
    box-shadow: 4px 5px 0 var(--ink);
}
.tl__event[data-style="sticker"] .tl-media--chip { border: 2px solid var(--ink); background: var(--lane-accent); }
.tl__event[data-style="sticker"] .tl-card h3 { font-size: 13px; }
.tl__event[data-style="sticker"]:hover .tl-card, .tl__event[data-style="sticker"]:focus-within .tl-card { box-shadow: 6px 8px 0 var(--ink); }

/* ── Sub-timeline drawer ────────────────────────────────────────────────── */

.tl__branch { position: relative; margin-top: 14px; padding: 20px 20px 24px; border: 1px solid var(--ink); border-radius: 20px; background: var(--card); }
.tl__branch::before { content: "⑂"; position: absolute; top: -15px; left: 42px; display: grid; width: 30px; height: 30px; place-items: center; border: 1px solid var(--ink); border-radius: 50%; background: var(--acid); font-size: 13px; }
.tl__branch-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.tl__branch-head h3 { flex: 1; margin: 0; font: 500 19px Georgia, "Times New Roman", serif; letter-spacing: -.025em; }
.tl__branch-eyebrow { display: flex; align-items: center; gap: 7px; margin: 0; color: var(--ink-soft); font-size: 8px; font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
.tl__branch-eyebrow i { width: 8px; height: 8px; border-radius: 50%; background: var(--lane-accent); }
.tl__branch-close { display: grid; width: 32px; height: 32px; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: transparent; font-size: 19px; line-height: 1; cursor: pointer; }
.tl__branch-close:hover { border-color: var(--ink); background: var(--paper-deep); }
.tl[data-depth="1"] { margin-top: 0; }
.tl[data-depth="1"] .tl__viewport { border-radius: 15px; background: var(--paper); }

/* ── Detail dialog ──────────────────────────────────────────────────────── */

.tl-pop { --lane-accent: var(--acid); width: min(760px, calc(100% - 28px)); max-height: calc(100vh - 30px); padding: 0; overflow: hidden; border: 0; border-radius: 22px; color: var(--ink); background: var(--card); box-shadow: 0 30px 100px rgba(0, 0, 0, .32); }
.tl-pop::backdrop { background: rgba(11, 23, 17, .74); backdrop-filter: blur(5px); }
.tl-pop__shell { position: relative; max-height: calc(100vh - 30px); overflow-y: auto; }
.tl-pop__close { position: absolute; z-index: 5; top: 16px; right: 16px; display: grid; width: 36px; height: 36px; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: var(--card); font-size: 22px; line-height: 1; cursor: pointer; }
.tl-pop__close:hover { border-color: var(--ink); }

.tl-pop__head { display: flex; gap: 20px; padding: 28px 30px 24px; border-bottom: 1px solid var(--line); background: linear-gradient(160deg, color-mix(in srgb, var(--lane-accent) 26%, var(--paper)) 0%, var(--card) 78%); }
.tl-pop__headline { flex: 1; min-width: 0; padding-right: 38px; }
.tl-pop__eyebrow { display: flex; align-items: center; gap: 7px; margin: 0 0 9px; color: var(--ink-soft); font-size: 8px; font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
.tl-pop__eyebrow i { width: 8px; height: 8px; border-radius: 50%; background: var(--lane-accent); }
.tl-pop__eyebrow em { padding: 2px 7px; border-radius: 99px; background: rgba(21, 39, 31, .1); font-style: normal; }
.tl-pop__head h2 { margin: 0; font: 500 clamp(22px, 3vw, 30px)/1.1 Georgia, "Times New Roman", serif; letter-spacing: -.032em; }
.tl-pop__stamp { margin: 8px 0 0; color: var(--ink-soft); font-size: 10px; font-weight: 700; }
.tl-pop__head .tl-meter { max-width: 240px; }

.tl-pop__scroll { padding: 24px 30px 32px; }
.tl-pop__lede { margin: 0 0 20px; font-size: 13.5px; line-height: 1.62; }
.tl-pop__block { margin-top: 22px; }
.tl-pop__block h4 { display: flex; align-items: baseline; gap: 8px; margin: 0 0 11px; font-size: 9px; font-weight: 850; letter-spacing: .15em; text-transform: uppercase; }
.tl-pop__block h4 small { color: var(--ink-soft); font-size: 8px; font-weight: 700; letter-spacing: .08em; text-transform: none; }
.tl-pop__block--impact { padding: 16px 18px; border-left: 3px solid var(--lane-accent); border-radius: 0 12px 12px 0; background: var(--paper-deep); }
.tl-pop__block--impact p { margin: 0; font-size: 12.5px; line-height: 1.6; }

.tl-points { margin: 0; padding: 0; list-style: none; }
.tl-points li { position: relative; padding: 0 0 0 20px; margin-bottom: 9px; font-size: 12px; line-height: 1.55; }
.tl-points li::before { content: ""; position: absolute; top: 7px; left: 2px; width: 7px; height: 7px; border: 1px solid var(--ink); border-radius: 2px; background: var(--lane-accent); }

.tl-res { display: grid; gap: 7px; }
.tl-res__link { display: flex; width: 100%; align-items: center; gap: 11px; padding: 11px 13px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); color: var(--ink); font: inherit; text-align: left; text-decoration: none; cursor: pointer; transition: .18s ease; }
.tl-res__link:hover { border-color: var(--ink); background: var(--white); }
.tl-res__icon { display: grid; width: 26px; height: 26px; flex: 0 0 26px; place-items: center; border-radius: 8px; background: var(--lane-accent); font-size: 11px; }
.tl-res__link--internal .tl-res__icon { background: var(--blue); }
.tl-res__body { flex: 1; min-width: 0; }
.tl-res__body strong { display: block; font-size: 11.5px; font-weight: 700; }
.tl-res__body small { display: block; margin-top: 2px; color: var(--ink-soft); font-size: 9.5px; }
.tl-res__go { color: var(--ink-soft); font-size: 12px; }

.tl-pop__branch { display: flex; width: 100%; align-items: center; gap: 4px; margin: 24px 0 4px; padding: 15px 18px; border: 1px solid var(--ink); border-radius: 14px; background: var(--acid); text-align: left; cursor: pointer; }
.tl-pop__branch span { color: rgba(21, 39, 31, .66); font-size: 9px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.tl-pop__branch strong { flex: 1; margin-left: 12px; font-size: 12px; }
.tl-pop__branch i { font-size: 15px; font-style: normal; }
.tl-pop__body { margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); }
.tl-pop__loading, .tl-pop__error { color: var(--ink-soft); font-size: 11px; }

/* ── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 760px) {
    .tl { --tl-height: 600px; }
    .tl__chrome { display: block; }
    .tl__legend { margin-top: 14px; }
    .tl__viewport { border-radius: 15px; }
    .tl__event { --tl-card: 208px !important; }
    .tl-media--card { height: 104px; }
    .tl__branch { padding: 18px 13px 20px; }
    .tl-pop__head { display: block; padding: 24px 20px 20px; }
    .tl-pop__headline { padding-right: 34px; }
    .tl-media--hero { margin-bottom: 16px; }
    .tl-pop__scroll { padding: 20px 20px 26px; }
}

@media (prefers-reduced-motion: reduce) {
    .tl__event { opacity: 1; transform: none; }
    .tl-media--float > *, .tl-media--pulse > *, .tl-media--drift > * { animation: none; }
    .tl__viewport { scroll-behavior: auto; }
}

/* ── Page chrome for timeline.html ──────────────────────────────────────── */

a.nav-item { text-decoration: none; }
.topbar-title { margin: 0; font: 500 17px Georgia, "Times New Roman", serif; letter-spacing: -.02em; }
.timeline-page-view { min-height: calc(100vh - 72px); }
.timeline-home { display: grid; min-height: calc(100vh - 225px); place-items: center; }
.timeline-landing-image { width: min(720px, 100%); overflow: hidden; margin: 0; border: 1px solid var(--line); border-radius: 20px; background: var(--card); box-shadow: 0 18px 48px rgba(21,39,31,.07); }
.timeline-landing-image img { display: block; width: 100%; height: auto; max-height: 320px; object-fit: contain; }
.timeline-landing-image figcaption { padding: 19px 23px 20px; border-top: 1px solid var(--line); }
.timeline-landing-image strong { font: 500 clamp(20px, 2.4vw, 28px)/1 Georgia, "Times New Roman", serif; }
.timeline-series__heading { margin-bottom: 30px; }
.timeline-series__heading .eyebrow { margin-bottom: 10px; }
.timeline-series__heading h1 { width: 100%; margin: 0; font: 500 clamp(38px, 5vw, 60px)/1.02 Georgia, "Times New Roman", serif; letter-spacing: -.045em; }
.timeline-series__note { max-width: 72ch; margin: 16px 0 0; color: var(--ink-soft); font-size: 12px; line-height: 1.65; }
.tl-mount { min-height: 120px; }
.tl-mount[data-state="loading"], .tl-mount[data-state="error"] { display: grid; place-items: center; padding: 40px; border: 1px dashed var(--line); border-radius: 20px; background: var(--card); }
.tl-fallback { max-width: 60ch; margin: 0; color: var(--ink-soft); font-size: 11px; text-align: center; }
.tl-fallback code { padding: 2px 5px; border-radius: 4px; background: var(--paper-deep); font-size: 10px; }

@media (max-width: 760px) {
    .timeline-page-view { min-height: calc(100vh - 58px); }
    .timeline-home { min-height: calc(100vh - 181px); }
    .timeline-landing-image { border-radius: 15px; }
    .timeline-landing-image img { max-height: none; }
    .timeline-landing-image figcaption { padding: 16px 17px; }
    .timeline-series__heading { margin-bottom: 24px; }
    .timeline-series__heading h1 { font-size: clamp(36px, 11vw, 50px); }
    .timeline-series__note { margin-top: 13px; }
}