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

:root {
    --ink: #000000;
    --ink-soft: #4a4a4a;
    --ink-faint: rgba(0, 0, 0, 0.45);
    --paper: #F3F3EF;
    --blue: #0000FF;
    --blue-soft: rgba(0, 0, 255, 0.55);
    --blue-hair: rgba(0, 0, 255, 0.28);
    --select: rgba(0, 0, 255, 0.18);
    --line: rgba(0, 0, 0, 0.16);
    --grid-step: 15px;
    --frame-offset: 15px;
    --frame-pad: 30px;

    --guide-minor: rgba(0, 0, 255, 0.032);
    --guide-major: rgba(0, 0, 255, 0.085);
    --guide-strong: rgba(0, 0, 255, 0.26);
    --guide-soft: rgba(0, 0, 255, 0.14);

    --col-num: 52px;
    --col-note: 384px;

    --frame-gap: var(--frame-offset);
    --frame-border: 5px;

    --safe-top: env(safe-area-inset-top);
    --safe-right: env(safe-area-inset-right);
    --safe-bottom: env(safe-area-inset-bottom);
    --safe-left: env(safe-area-inset-left);

    --content-w: 940px;
}

html { -webkit-text-size-adjust: 100%; }

body {
    font-family: 'Inter', 'Space Grotesk', sans-serif;
    background-color: var(--paper);
    background-image:
        repeating-linear-gradient(to right,  var(--guide-major) 0 1px, transparent 1px calc(var(--grid-step) * 5)),
        repeating-linear-gradient(to bottom, var(--guide-major) 0 1px, transparent 1px calc(var(--grid-step) * 5)),
        repeating-linear-gradient(to right,  var(--guide-minor) 0 1px, transparent 1px var(--grid-step)),
        repeating-linear-gradient(to bottom, var(--guide-minor) 0 1px, transparent 1px var(--grid-step));
    background-position: var(--frame-offset) var(--frame-offset);
    color: var(--ink);
    min-height: 100dvh;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

::selection { background: var(--select); }

.blue-frame {
    position: relative;
    margin: calc(var(--frame-offset) + var(--safe-top)) calc(var(--frame-offset) + var(--safe-right)) calc(var(--frame-offset) + var(--safe-bottom)) calc(var(--frame-offset) + var(--safe-left));
    min-height: calc(100dvh - (var(--frame-offset) * 2));
    border: var(--frame-border) solid var(--blue-pure);
    padding: var(--frame-pad);
    display: flex;
    flex-direction: column;
    z-index: 2;
}

.guides {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: -1;
}

.guides-column {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: min(100% - var(--frame-pad) * 2, var(--content-w));

    background-image:
        linear-gradient(var(--guide-soft), var(--guide-soft)),
        linear-gradient(var(--guide-soft), var(--guide-soft));
    background-repeat: no-repeat;
    background-size: 1px 100%, 1px 100%;
    background-position:
        var(--col-num) top,
        calc(100% - var(--col-note)) top;
}

.guides-column::before,
.guides-column::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--guide-strong);
}

.guides-column::before { left: 0; }
.guides-column::after { right: 0; }

.main-content {
    display: flex;
    flex-direction: column;
    gap: calc(var(--grid-step) * 4);
    width: 100%;
    max-width: var(--content-w);
    margin: 0 auto;
    padding-top: calc(var(--grid-step) * 5);
    padding-bottom: calc(var(--grid-step) * 3);
    flex: 1 1 auto;
    position: relative;
    --mark-pen: var(--blue-pure);
    --mark-red: var(--mark-red-pure);

    --mark-wash-mode: multiply;
    --mark-wash-alpha: 0.16;

    --hand-note: clamp(18px, 2.1vw, 21px);
}

:root[data-theme="dark"] .main-content {
    --mark-wash-mode: screen;
    --mark-wash-alpha: 0.22;
}

.hero {
    display: flex;
    flex-direction: column;
    position: relative;
}

@font-face {
    font-family: 'Certa Sans';
    src: url('/fonts/certa-sans-medium.woff2') format('woff2');
    font-weight: 500;
    font-style: normal;
    font-display: block;
}

.page-title {
    font-family: 'Certa Sans', 'Inter', sans-serif;
    font-weight: 500;
    font-size: min(calc((100vw - 124px) / 8.42), 111px);
    line-height: 1;
    letter-spacing: 0;
    color: var(--ink);
    white-space: nowrap;
}

.name-line {
    display: inline;
    white-space: nowrap;
}

.name-dot { display: none; }

.page-subtitle {
    font-family: var(--hand);
    font-synthesis-weight: none;
    font-size: clamp(25.85px, 3.94vw, 36.96px);
    font-weight: 600;
    line-height: 1;
    color: var(--blue-pure);
    align-self: flex-start;
    transform: rotate(-4.5deg);
    transform-origin: left center;
    margin: 10px 0 0 50%;
}

.name-lens {
    position: absolute;
    pointer-events: none;
    z-index: 1;
}

.name-grip {
    position: absolute;
    top: 0;
    left: 0;
    border-radius: 999px;
    touch-action: none;
    z-index: 2;
}

.hero-epigraph {
    width: fit-content;
    margin: calc(var(--grid-step) * 1.6) 0 0;
}

.hero-lead {
    max-width: 58ch;
    margin: 0;
    font-size: clamp(15px, 1.9vw, 17px);
    line-height: 1.62;
    color: var(--ink-soft);
}

.hero-lead p {
    margin: 0;
    text-indent: -0.9em;
}

.hero-quo {
    font-family: var(--hand);
    font-synthesis-weight: none;
    font-weight: 600;
    font-size: 1.4em;
    line-height: 0;
    color: var(--mark-red);
}

.hero-lead p > .hero-quo:first-child {
    position: relative;
    left: -5px;
}

.hero-sign {
    width: fit-content;
    margin: -6px 2ch 0 auto;
    font-family: var(--hand);
    font-synthesis-weight: none;
    font-size: var(--hand-note);
    font-weight: 600;
    line-height: 1;
    color: var(--blue-pure);
    transform: translate(var(--sign-x, 0px), var(--sign-y, 0px)) rotate(-3deg);
    transform-origin: right center;
}

.hero-marks {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 0;
}

.row-marks {
    position: absolute;
    pointer-events: none;
    z-index: 0;
}

.index {
    display: flex;
    flex-direction: column;
    gap: calc(var(--grid-step) * 2.6);
    counter-reset: idx;
}

.group-title {
    display: flex;
    align-items: center;
    gap: 14px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: calc(var(--grid-step) * 0.8);
}

.group-title::after {
    content: '';
    flex: 1 1 auto;
    height: 1px;
    background: var(--line);
}

.idx-item {
    position: relative;
    display: grid;
    grid-template-columns: var(--col-num) minmax(0, auto) 1fr minmax(0, var(--col-note));
    align-items: baseline;
    gap: 0 12px;
    padding: 9px 0;
    text-decoration: none;
    color: var(--ink);
    border-bottom: 1px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.idx-num {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--ink-faint);
    transition: color 0.2s ease;
}

.idx-num::before {
    counter-increment: idx;
    content: counter(idx, decimal-leading-zero);
}

.idx-name {
    font-size: clamp(19px, 2.6vw, 25px);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.idx-line { display: block; }

.idx-name sup {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.42em;
    font-weight: 400;
    letter-spacing: 0.08em;
    vertical-align: super;
    margin-left: 3px;
    color: var(--ink-faint);
}

.idx-dots {
    height: 1px;
    align-self: baseline;
    margin-bottom: 2px;
    background-image: radial-gradient(circle, var(--line) 1px, transparent 1px);
    background-size: 6px 2px;
    background-repeat: repeat-x;
    background-position: bottom;
    transition: background-image 0.2s ease;
}

.idx-note {
    font-size: 14px;
    line-height: 1.45;
    color: var(--ink-faint);
    transition: color 0.2s ease;
}

.idx-item:hover,
.idx-item:focus-visible {
    color: var(--blue);
    outline: none;
}

.idx-item:hover .idx-num,
.idx-item:focus-visible .idx-num { color: var(--blue-soft); }

.idx-item:hover .idx-note,
.idx-item:focus-visible .idx-note { color: var(--ink-soft); }

.idx-item:hover .idx-dots,
.idx-item:focus-visible .idx-dots {
    background-image: radial-gradient(circle, var(--blue-soft) 1px, transparent 1px);
}

.idx-item:focus-visible { border-bottom-color: var(--blue-soft); }

.idx-icon {
    grid-column: 1;
    grid-row: 2;
    align-self: start;
    justify-self: start;
    margin-top: 5px;
    pointer-events: none;
}

[data-icon-at] { position: relative; }

.cursor-icon.idx-icon.at-line {
    grid-column: auto;
    grid-row: auto;
    display: inline-block;
    vertical-align: -0.34em;
    width: 30px;
    height: 30px;
    margin: 0 0 0 8px;
}

.cursor-icon.idx-icon.at-sup {
    grid-column: auto;
    grid-row: auto;
    display: inline-block;
    vertical-align: super;
    width: 24px;
    height: 24px;
    margin: 0 0 0 4px;
}

.contacts {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px 22px;
    padding-top: calc(var(--grid-step) * 0.4);
}

.contacts-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink-faint);
}

.contacts a {
    font-size: 16px;
    font-weight: 600;
    color: var(--blue);
    text-decoration: none;
    border-bottom: 1px solid var(--blue-hair);
    transition: border-color 0.2s ease, opacity 0.2s ease;
}

.contacts a:hover {
    border-bottom-color: var(--blue);
    opacity: 0.85;
}

.bottom-info {
    --footer-gap: calc(var(--grid-step) * 3);
    width: 100%;
    max-width: var(--content-w);
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 720px) {
    :root { --frame-pad: 20px; }

    .main-content {
        gap: calc(var(--grid-step) * 3);
        padding-top: calc(var(--grid-step) * 5.2);
    }

    .idx-item {
        grid-template-columns: var(--col-num) 1fr;
        gap: 2px 12px;
    }

    .idx-dots { display: none; }

    .idx-note { grid-column: 2; }

    .guides-column {
        background-image: linear-gradient(var(--guide-soft), var(--guide-soft));
        background-size: 1px 100%;
        background-position: var(--col-num) top;
    }
}

@media (max-width: 480px) {
    :root { --col-num: 42px; }

    .name-line { display: block; }

    .page-title {
        font-size: calc((100vw - 80px) / 4.44);
        line-height: 0.914;
    }

    .page-subtitle {
        position: absolute;
        top: 0;
        left: 0;
        margin: 0;
        transform: rotate(-2.5deg);
        font-size: 19px;
    }

    .name-dot {
        display: inline-block;
        vertical-align: baseline;
        color: var(--blue-pure);
        pointer-events: auto;
    }

    .name-dot svg {
        display: block;
        width: 100%;
        height: 100%;
        overflow: visible;
    }
}

@media (prefers-reduced-motion: reduce) {
    .idx-item,
    .idx-num,
    .idx-note,
    .idx-dots { transition: none; }
}