:root {
    color-scheme: light;
    --paper: #f7f7f7;
    --ink: #171717;
    --body: #3d3d3d;
    --muted: #828282;
    --faint: #ababab;
    --rule: #dddddd;
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100dvh;
    background: var(--paper);
    color: var(--body);
    font-family: "Plus Jakarta Sans", system-ui, sans-serif;
    font-weight: 400;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

body.preview-open,
body.mobile-context-open,
body.mobile-toc-open {
    overflow: hidden;
}

a {
    color: inherit;
}

.container {
    display: grid;
    grid-template-columns: minmax(10rem, 0.72fr) minmax(0, 2fr) minmax(12rem, 0.92fr);
    gap: clamp(2.5rem, 5vw, 6.5rem);
    width: min(100%, 92rem);
    margin: 0 auto;
    padding: clamp(3rem, 7vw, 7rem) clamp(1.5rem, 4vw, 4.5rem) 20vh;
}

/* Both side rails remain quiet and stable while the text moves between them. */
.table-of-contents,
.relationships {
    position: sticky;
    top: clamp(2rem, 6vh, 4.5rem);
    align-self: start;
    height: calc(100dvh - clamp(4rem, 12vh, 9rem));
    overflow-y: auto;
    scrollbar-width: none;
}

.table-of-contents {
    overflow-x: hidden;
}

.relation-rail-header {
    display: flex;
    align-items: start;
    justify-content: space-between;
}

.mobile-context-close,
.mobile-context-trigger,
.mobile-context-scrim,
.mobile-toc-trigger,
.mobile-toc-scrim {
    display: none;
}

.table-of-contents::-webkit-scrollbar,
.relationships::-webkit-scrollbar {
    display: none;
}

.rail-title,
.relation-heading,
.reader-kicker,
.statement-label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.rail-title {
    margin-bottom: 2.1rem;
    color: var(--muted);
    font-size: 0.78rem;
    letter-spacing: 0.17em;
}

.toc-group + .toc-group {
    margin-top: 2.2rem;
}

.toc-group-title {
    margin-bottom: 0.8rem;
    color: var(--faint);
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.toc-group-links {
    display: flex;
    flex-direction: column;
    gap: 0.58rem;
}

.table-of-contents a {
    display: block;
    max-width: 100%;
    color: var(--muted);
    font-size: 0.86rem;
    line-height: 1.35;
    overflow-wrap: anywhere;
    text-decoration: none;
    transition: color 180ms ease, transform 180ms ease;
}

.table-of-contents a:hover,
.table-of-contents a:focus-visible {
    color: #4d4d4d;
}

.table-of-contents a.is-active {
    color: var(--ink);
    font-weight: 500;
    transform: translateX(0.32rem);
}

.main-text {
    min-width: 0;
}

.reader-header {
    margin-bottom: clamp(5rem, 10vw, 9rem);
}

.reader-kicker {
    margin-bottom: 1.25rem;
    color: var(--muted);
}

.reader-title {
    max-width: 12ch;
    color: var(--ink);
    font-size: clamp(2.15rem, 4.5vw, 4.4rem);
    font-weight: 500;
    letter-spacing: -0.055em;
    line-height: 0.98;
}

.reader-intro {
    max-width: 38rem;
    margin-top: 1.7rem;
    color: var(--muted);
    font-size: 0.92rem;
}

.translation-control {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.translation-picker {
    position: relative;
    display: inline-block;
}

.translation-trigger,
.translation-option {
    color: var(--ink);
    font: inherit;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
}

.translation-trigger {
    position: relative;
    min-width: 8.2rem;
    padding: 0 1.15rem 0.12rem 0;
    border: 0;
    border-bottom: 1px solid var(--rule);
    border-radius: 0;
    background: transparent;
    line-height: inherit;
    transition: border-color 160ms ease;
}

/* The quiet chevron is part of the custom control, not browser-rendered chrome. */
.translation-trigger::after {
    position: absolute;
    top: 50%;
    right: 0.15rem;
    width: 0.36rem;
    height: 0.36rem;
    border-right: 1px solid var(--ink);
    border-bottom: 1px solid var(--ink);
    content: "";
    transform: translateY(-65%) rotate(45deg);
    transition: transform 160ms ease;
}

.translation-picker.is-open .translation-trigger::after {
    transform: translateY(-30%) rotate(225deg);
}

.translation-trigger:hover,
.translation-trigger:focus-visible,
.translation-picker.is-open .translation-trigger {
    border-color: var(--ink);
}

.translation-listbox {
    position: absolute;
    top: calc(100% - 1px);
    left: -0.55rem;
    z-index: 3;
    display: grid;
    min-width: calc(100% + 1.1rem);
    padding: 0.3rem;
    border: 1px solid #cfcfcf;
    border-radius: 0.4rem;
    background: #ffffff;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-0.15rem);
    transition: opacity 140ms ease, transform 140ms ease;
}

.translation-picker.is-open .translation-listbox {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.translation-option {
    width: 100%;
    padding: 0.42rem 0.5rem;
    border: 0;
    border-radius: 0.25rem;
    background: #ffffff;
    line-height: 1.3;
}

.translation-option:hover,
.translation-option:focus-visible,
.translation-option[aria-selected="true"] {
    background: #eeeeee;
    outline: none;
}

.translation-trigger:focus-visible {
    outline: none;
}

.translation-option:focus-visible {
    border-color: var(--muted);
}

.statement {
    scroll-margin-top: 18vh;
    margin-bottom: clamp(4rem, 9vw, 7.5rem);
    color: #555555;
    cursor: pointer;
    transition: color 220ms ease;
}

.statement:hover,
.statement:focus-visible,
.statement.is-active {
    color: var(--ink);
}

.statement-label {
    display: block;
    margin-bottom: 1rem;
    color: var(--faint);
    transition: color 220ms ease;
}

.statement.is-active .statement-label {
    color: var(--muted);
}

.statement-copy {
    font-size: clamp(1.02rem, 1.25vw, 1.16rem);
    line-height: 1.82;
    text-wrap: pretty;
}

.relationships {
    color: var(--muted);
    font-size: 0.78rem;
    line-height: 1.6;
}

.relation-current {
    margin-bottom: 2.8rem;
    color: var(--ink);
    font-size: 0.98rem;
    font-weight: 500;
    line-height: 1.35;
}

.relation-group + .relation-group {
    margin-top: 2.3rem;
}

.relation-heading {
    margin-bottom: 0.85rem;
    color: var(--faint);
    font-size: 0.65rem;
}

.relationship {
    display: block;
    width: 100%;
    margin-bottom: 1rem;
    border: 0;
    background: transparent;
    color: var(--muted);
    font: inherit;
    text-align: left;
    cursor: pointer;
    transition: color 180ms ease;
}

.relationship:hover,
.relationship:focus-visible {
    color: var(--ink);
}

.relationship-name {
    display: block;
    margin-bottom: 0.2rem;
    color: #565656;
    font-weight: 500;
}

.relation-empty {
    color: var(--faint);
}

/* The full text reads as a second sheet of paper over the current position. */
.passage-preview {
    position: fixed;
    inset: 0;
    z-index: 30;
    visibility: hidden;
    pointer-events: none;
    transition: visibility 0s linear 280ms;
}

.passage-preview.is-open {
    visibility: visible;
    pointer-events: auto;
    transition-delay: 0s;
}

.preview-scrim {
    position: absolute;
    inset: 0;
    background: rgb(23 23 23 / 22%);
    opacity: 0;
    transition: opacity 240ms ease;
}

.passage-preview.is-open .preview-scrim {
    opacity: 1;
}

.preview-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: min(34rem, calc(100vw - 2rem));
    height: 100dvh;
    overflow-y: auto;
    padding: clamp(2rem, 5vw, 4.5rem);
    border-left: 1px solid var(--rule);
    background: var(--paper);
    transform: translateX(100%);
    transition: transform 280ms cubic-bezier(0.16, 1, 0.3, 1);
}

.passage-preview.is-open .preview-panel {
    transform: translateX(0);
}

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 3.5rem;
    padding-bottom: 1rem;
    background: var(--paper);
}

.preview-kicker,
.preview-go {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.preview-kicker {
    color: var(--muted);
}

.preview-go {
    border: 0;
    border-bottom: 1px solid var(--muted);
    background: transparent;
    color: var(--ink);
    font-family: inherit;
    cursor: pointer;
}

/* Draw the close mark in CSS so it remains crisp and cannot render as an emoji. */
.icon-close {
    position: relative;
    flex: 0 0 auto;
    width: 2rem;
    height: 2rem;
    border: 0;
    background: transparent;
    color: var(--ink);
    cursor: pointer;
}

.icon-close::before,
.icon-close::after {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1.05rem;
    height: 1px;
    background: currentColor;
    content: "";
}

.icon-close::before {
    transform: translate(-50%, -50%) rotate(45deg);
}

.icon-close::after {
    transform: translate(-50%, -50%) rotate(-45deg);
}

.preview-title {
    margin-bottom: 2rem;
    color: var(--ink);
    font-size: clamp(1.6rem, 3vw, 2.35rem);
    font-weight: 500;
    letter-spacing: -0.035em;
    line-height: 1.1;
}

.preview-copy {
    color: var(--body);
    font-size: clamp(1rem, 1.5vw, 1.12rem);
    line-height: 1.85;
    white-space: pre-line;
}

.preview-go {
    margin-top: 3.5rem;
    padding-bottom: 0.12rem;
}

:focus-visible {
    outline: 1px solid var(--ink);
    outline-offset: 0.25rem;
}

@media (max-width: 62rem) {
    .container {
        grid-template-columns: minmax(9rem, 0.6fr) minmax(0, 1.7fr);
    }

    .relationships {
        position: fixed;
        inset: auto 0 0;
        z-index: 20;
        display: block;
        width: 100%;
        height: min(76dvh, 42rem);
        padding: 1.5rem clamp(1.25rem, 5vw, 3rem) 2.5rem;
        border-top: 1px solid var(--rule);
        background: var(--paper);
        visibility: hidden;
        transform: translateY(100%);
        transition: transform 260ms cubic-bezier(0.16, 1, 0.3, 1), visibility 260ms;
    }

    .relationships.is-mobile-open {
        visibility: visible;
        transform: translateY(0);
    }

    .mobile-context-close {
        display: block;
    }

    .mobile-context-trigger {
        position: fixed;
        right: 1.25rem;
        bottom: 1.25rem;
        z-index: 10;
        display: block;
        padding: 0.7rem 0.85rem;
        border: 1px solid var(--ink);
        background: var(--paper);
        color: var(--ink);
        font-family: inherit;
        font-size: 0.72rem;
        font-weight: 600;
        letter-spacing: 0.06em;
        cursor: pointer;
    }

    .mobile-context-scrim {
        position: fixed;
        inset: 0;
        z-index: 15;
        width: 100%;
        height: 100%;
        border: 0;
        background: rgb(23 23 23 / 18%);
        opacity: 0;
        visibility: hidden;
        transition: opacity 220ms ease, visibility 220ms;
    }

    .mobile-context-scrim.is-open {
        display: block;
        opacity: 1;
        visibility: visible;
    }
}

@media (max-width: 44rem) {
    .container {
        display: block;
        padding: 2rem 1.25rem 15vh;
    }

    .table-of-contents {
        position: fixed;
        inset: 0 auto 0 0;
        z-index: 20;
        width: min(21rem, calc(100vw - 3rem));
        height: 100dvh;
        padding: 5.5rem 1.5rem 3rem;
        border-right: 1px solid var(--rule);
        background: var(--paper);
        visibility: hidden;
        pointer-events: none;
        transform: translateX(-100%);
        transition: transform 280ms cubic-bezier(0.16, 1, 0.3, 1), visibility 280ms;
    }

    .table-of-contents.is-mobile-open {
        visibility: visible;
        pointer-events: auto;
        transform: translateX(0);
    }

    .mobile-toc-trigger {
        position: fixed;
        top: 1rem;
        left: 1rem;
        z-index: 25;
        display: grid;
        width: 2.75rem;
        height: 2.75rem;
        border: 0;
        /* Use the same translucent paper behind both menu icon states. */
        background: rgb(247 247 247 / 35%);
        color: var(--ink);
        cursor: pointer;
        place-items: center;
    }

    .menu-icon {
        position: relative;
        display: block;
        width: 1.2rem;
        height: 0.9rem;
    }

    .menu-line {
        position: absolute;
        left: 0;
        display: block;
        width: 100%;
        height: 1px;
        background: currentColor;
        transform-origin: center;
        transition: top 220ms cubic-bezier(0.16, 1, 0.3, 1),
            transform 220ms cubic-bezier(0.16, 1, 0.3, 1),
            opacity 140ms ease;
    }

    .menu-line:nth-child(1) {
        top: 0;
    }

    .menu-line:nth-child(2) {
        top: calc(50% - 0.5px);
    }

    .menu-line:nth-child(3) {
        top: calc(100% - 1px);
    }

    /* The same three strokes become the close mark without replacing the button. */
    .mobile-toc-trigger.is-open .menu-line:nth-child(1) {
        top: calc(50% - 0.5px);
        transform: rotate(45deg);
    }

    .mobile-toc-trigger.is-open .menu-line:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }

    .mobile-toc-trigger.is-open .menu-line:nth-child(3) {
        top: calc(50% - 0.5px);
        transform: rotate(-45deg);
    }

    .mobile-toc-scrim {
        position: fixed;
        inset: 0;
        z-index: 15;
        width: 100%;
        height: 100%;
        border: 0;
        background: rgb(23 23 23 / 18%);
        opacity: 0;
        visibility: hidden;
        transition: opacity 220ms ease, visibility 220ms;
    }

    .mobile-toc-scrim.is-open {
        display: block;
        opacity: 1;
        visibility: visible;
    }

    .rail-title {
        margin-bottom: 1.25rem;
    }

    .toc-group + .toc-group {
        margin-top: 1.6rem;
    }

    .reader-header {
        padding-top: 2.5rem;
        margin-bottom: 5rem;
    }

    .reader-title {
        font-size: clamp(2.4rem, 13vw, 3.8rem);
    }

    .statement {
        margin-bottom: 4.5rem;
    }

    .preview-panel {
        top: auto;
        bottom: 0;
        width: 100%;
        height: min(84dvh, 46rem);
        padding: 1.5rem 1.25rem 2.5rem;
        border-top: 1px solid var(--rule);
        border-left: 0;
        transform: translateY(100%);
    }

    .passage-preview.is-open .preview-panel {
        transform: translateY(0);
    }

    .preview-header {
        margin-bottom: 2.5rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
    }
}