:root {
    --gold: #c9a227;
    --gold-hover: #e8c547;
    --ink: #0a0f1c;
    --ink-raised: #111827;
    --text: #f8fafc;
    --muted: #94a3b8;
    --soft: #64748b;
    --line: rgba(255, 255, 255, 0.1);
    --measure: 68ch;
    --bar: 7.4rem;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background:
        radial-gradient(900px 420px at 10% -10%, rgba(201, 162, 39, 0.08), transparent 60%),
        var(--ink);
    color: var(--text);
    font-family: Inter, system-ui, sans-serif;
    line-height: 1.65;
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: 1rem;
    z-index: 20;
    transform: translateY(-160%);
    background: var(--gold);
    color: var(--ink);
    padding: 0.5rem 0.8rem;
    border-radius: 999px;
}

.skip-link:focus { transform: none; }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.read-bar {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(10, 15, 28, 0.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(16px);
}

.read-bar__progress {
    height: 3px;
    background: rgba(201, 162, 39, 0.18);
}

.read-bar__progress span {
    display: block;
    height: 100%;
    width: 0;
    background: var(--gold);
}

.read-bar__row,
.read-tools,
.read-shell,
.essay-end {
    width: min(1120px, calc(100% - 2rem));
    margin-inline: auto;
}

.read-bar__row {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    min-height: 3.1rem;
}

.read-bar__title {
    flex: 1 1 auto;
    min-width: 0;
    margin: 0;
    overflow: hidden;
    font-family: "Playfair Display", Georgia, serif;
    font-size: 1.05rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.read-bar a,
.essay a { color: var(--gold-hover); }

.contents-button,
.lens button,
.search button,
.note__close,
.footnote,
.path a,
.outline a,
.continue {
    font: inherit;
    color: inherit;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 999px;
}

.contents-button,
.lens button,
.search button,
.note__close,
.continue {
    min-height: 2.4rem;
    padding: 0.2rem 0.8rem;
    cursor: pointer;
}

.contents-button { margin-left: auto; }

.read-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem 1rem;
    align-items: center;
    min-width: 0;
    padding-bottom: 0.75rem;
}

.search {
    display: flex;
    flex: 1 1 16rem;
    gap: 0.4rem;
    align-items: center;
    min-width: 0;
    max-width: 100%;
}

.search input {
    flex: 1;
    min-width: 0;
    min-height: 2.4rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
    padding: 0 0.9rem;
}

.search-count {
    min-width: 4.5rem;
    color: var(--soft);
    font-size: 0.78rem;
}

.lens-label {
    margin: 0;
    color: var(--soft);
    font-size: 0.78rem;
}

.lens {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.lens button[aria-checked="true"] {
    border-color: rgba(201, 162, 39, 0.7);
    background: rgba(201, 162, 39, 0.14);
    color: var(--gold-hover);
}

.read-shell {
    display: grid;
    grid-template-columns: 16rem minmax(0, 1fr);
    gap: 2rem;
    min-width: 0;
    padding: 2rem 0 4rem;
}

.essay { min-width: 0; }

.outline {
    position: sticky;
    top: calc(var(--bar) + 1rem);
    align-self: start;
    max-height: calc(100vh - var(--bar) - 2rem);
    overflow: auto;
    padding-right: 0.4rem;
}

.outline a,
.path a {
    display: block;
    border: 0;
    border-radius: 0.6rem;
    text-decoration: none;
    color: var(--muted);
}

.outline a {
    padding: 0.28rem 0.45rem;
    font-size: 0.82rem;
    line-height: 1.35;
}

.outline a.depth-2 { padding-left: 0.9rem; }
.outline a.depth-3,
.outline a.depth-4 { padding-left: 1.4rem; font-size: 0.78rem; }

.outline a[aria-current="true"],
.path a[aria-current="true"] {
    color: var(--text);
    background: rgba(201, 162, 39, 0.1);
}

.essay-intro h1,
.depth-1 {
    font-family: "Playfair Display", Georgia, serif;
    font-weight: 560;
    letter-spacing: -0.03em;
    line-height: 1.15;
}

.eyebrow {
    margin: 0 0 0.4rem;
    color: var(--gold);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.essay-intro h1 {
    margin: 0;
    font-size: clamp(2.4rem, 6vw, 4.4rem);
}

.lede,
.meta { color: var(--muted); }

.lede { max-width: 42rem; font-size: 1.05rem; }

.path {
    display: flex;
    gap: 0.45rem;
    max-width: 100%;
    min-width: 0;
    overflow-x: auto;
    padding: 0.2rem 0 0.6rem;
    scroll-snap-type: x proximity;
}

.path a {
    flex: 0 0 auto;
    max-width: 16rem;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--line);
    scroll-snap-align: start;
}

.path small {
    display: block;
    color: var(--soft);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

#letter {
    max-width: var(--measure);
    overflow-wrap: anywhere;
}

#letter :is(h2, h3, h4, h5) {
    scroll-margin-top: calc(var(--bar) + 0.8rem);
}

.depth-1 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin: 2.4rem 0 0.8rem; }
.depth-2 { font-size: 1.45rem; margin: 2rem 0 0.6rem; }
.depth-3,
.depth-4 { font-size: 1.12rem; margin: 1.5rem 0 0.45rem; }

.essay p { margin: 0.85rem 0; }

.essay em,
.note em { font-size: 0.88em; }

.essay [data-size="13"],
.note [data-size="13"] { font-size: 1.18em; }

.essay [data-size="12"],
.note [data-size="12"] { font-size: 1.09em; }

.essay [data-size="10"],
.note [data-size="10"] { font-size: 0.91em; }

.essay [data-size="9"],
.note [data-size="9"] { font-size: 0.82em; }

.pull {
    font-family: "Playfair Display", Georgia, serif;
    font-size: 1.35rem;
    line-height: 1.4;
    color: #e2e8f0;
}

.aside {
    border-left: 2px solid rgba(201, 162, 39, 0.45);
    padding-left: 0.9rem;
    color: #cbd5e1;
}

.essay ul,
.essay ol { padding-left: 1.2rem; }

.essay li { margin: 0.45rem 0; }
.essay li[data-lens] > .item-text {
    color: var(--gold-hover);
    font-weight: 650;
}

.figure {
    margin: 1.6rem 0 1.8rem;
}

.figure img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: 1.1rem;
    border: 1px solid var(--line);
}

.figure figcaption {
    margin-top: 0.55rem;
    color: var(--muted);
    font-family: "Playfair Display", Georgia, serif;
    font-size: 1rem;
}

.footnote {
    min-width: 1.4rem;
    min-height: 1.4rem;
    margin: 0 0.15rem;
    padding: 0 0.35rem;
    border-radius: 0.4rem;
    color: var(--gold-hover);
    font-size: 0.75rem;
    vertical-align: super;
    cursor: pointer;
}

.continue {
    display: inline-flex;
    margin: 1.4rem 0 0.2rem;
    text-decoration: none;
}

mark {
    background: rgba(201, 162, 39, 0.35);
    color: inherit;
    border-radius: 0.2rem;
}

mark.current { background: var(--gold); color: var(--ink); }

.essay-end {
    max-width: var(--measure);
    margin-top: 2.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
}

.note-backdrop {
    position: fixed;
    inset: 0;
    z-index: 30;
    display: grid;
    align-items: end;
    background: rgba(0, 0, 0, 0.45);
    padding: 1rem;
}

.note-backdrop[hidden] { display: none; }

.note {
    width: min(40rem, 100%);
    margin: 0 auto;
    padding: 1rem 1rem 1.1rem;
    border: 1px solid rgba(201, 162, 39, 0.35);
    border-radius: 1rem;
    background: var(--ink-raised);
}

.note__row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
}

.note h2 {
    margin: 0;
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gold);
}

#outline-dialog {
    width: min(28rem, calc(100% - 1.5rem));
    max-height: min(70vh, 36rem);
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 1rem;
    background: var(--ink-raised);
    color: var(--text);
}

#outline-dialog::backdrop { background: rgba(0, 0, 0, 0.55); }

#outline-dialog .dialog-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.6rem;
}

#outline-dialog h2 {
    margin: 0;
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gold);
}

#outline-dialog .outline {
    position: static;
    display: block;
    max-height: calc(70vh - 5rem);
    overflow: auto;
}

body[data-lens="coc"] #letter [data-lens="fide"],
body[data-lens="fide"] #letter [data-lens="coc"] { display: none; }

@media (max-width: 860px) {
    :root { --bar: 3.4rem; }
    .read-shell { grid-template-columns: 1fr; }
    .read-shell > .outline { display: none; }
    .read-bar__title { font-size: 0.95rem; }
    .read-bar {
        position: static;
        background: transparent;
        border-bottom: 0;
        backdrop-filter: none;
    }
    .read-bar__top {
        position: sticky;
        top: 0;
        z-index: 10;
        background: rgba(10, 15, 28, 0.92);
        border-bottom: 1px solid var(--line);
        backdrop-filter: blur(16px);
    }
    .read-tools { padding-top: 0.75rem; }
}

@media (min-width: 861px) {
    .contents-button { display: none; }
}

@media (max-width: 420px) {
    :root { --bar: 3.4rem; }
    .read-bar__row,
    .read-tools,
    .read-shell,
    .essay-end { width: min(100% - 1.25rem, 1120px); }
    .search {
        flex-basis: 100%;
        flex-wrap: wrap;
    }
    .search input { flex: 1 1 100%; }
    .search-count { min-width: 0; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *,
    *::before,
    *::after {
        transition: none !important;
        animation: none !important;
    }
}

:focus-visible {
    outline: 2px solid var(--gold);
    outline-offset: 2px;
}