/* ══════════════════════════════════════════════════════════════════════════
   publicne.ws — Stylebook
   Page-specific styles for the visual system documentation.
   ══════════════════════════════════════════════════════════════════════════ */

/* ─── Cover ────────────────────────────────────────────────────────── */
.cover {
    min-height: 88dvh;
    padding: calc(max(88px, 14vh) + env(safe-area-inset-top)) 0 var(--s-8);
    display: grid;
    align-content: space-between;
    gap: var(--s-8);
    position: relative;
}
.cover__top {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-5);
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--fg-muted);
}
.cover__top b {
    color: var(--fg);
    font-weight: 500;
}
.cover__top .red {
    color: var(--red);
}
.cover__top-row {
    display: flex;
    justify-content: space-between;
    gap: var(--s-3);
    padding: 10px 0;
    border-top: 1px solid var(--line);
}
.cover__top-row:last-child {
    border-bottom: 1px solid var(--line);
}
.cover__top-row:first-child {
    border-top: 1px solid var(--fg);
}

.cover__title {
    margin: 0;
    font-family: var(--f-display);
    font-weight: 800;
    font-size: var(--fs-hero);
    line-height: 0.82;
    letter-spacing: -0.055em;
    text-wrap: balance;
}
.cover__title .line {
    display: block;
    overflow: hidden;
    padding-bottom: 0.04em;
}
.cover__title .line > span {
    display: inline-block;
    transform: translateY(101%);
    animation: rise 900ms var(--ease) forwards;
}
.cover__title .line:nth-child(2) > span {
    animation-delay: 140ms;
}
.cover__title .red {
    color: var(--red);
}
@keyframes rise {
    to {
        transform: translateY(0);
    }
}

.cover__bottom {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-5);
    padding-top: var(--s-5);
    border-top: 1px solid var(--line);
    opacity: 0;
    animation: fadeInSlow 700ms var(--ease) 500ms forwards;
}
@keyframes fadeInSlow {
    to {
        opacity: 1;
    }
}

.cover__bottom p {
    margin: 0;
    font-size: var(--fs-lg);
    max-width: 54ch;
    text-wrap: pretty;
    line-height: 1.35;
}
.cover__bottom p b {
    color: var(--red);
    font-weight: 500;
}
.cover__bottom-meta {
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--fg-muted);
    display: grid;
    gap: 4px;
    align-self: end;
}
.cover__bottom-meta b {
    color: var(--fg);
    font-weight: 500;
}
.cover__bottom-meta .red {
    color: var(--red);
}

@media (min-width: 900px) {
    .cover__top {
        grid-template-columns: repeat(4, 1fr);
        gap: 0;
        padding: var(--s-4) 0;
        border-top: 1px solid var(--fg);
        border-bottom: 1px solid var(--line);
    }
    .cover__top-row {
        border: 0 !important;
        padding: 0;
        flex-direction: column;
        justify-content: flex-start;
        gap: 4px;
        padding-right: var(--s-5);
        border-right: 1px solid var(--line) !important;
    }
    .cover__top-row:last-child {
        border-right: 0 !important;
        padding-right: 0;
    }
    .cover__bottom {
        grid-template-columns: 1fr auto;
        align-items: end;
    }
}

/* ─── Table of contents ────────────────────────────────────────────── */
.toc {
    padding: var(--s-12) 0;
    border-top: 1px solid var(--fg);
}
.toc__head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--s-4);
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--fg-muted);
    margin-bottom: var(--s-8);
}
.toc__head b {
    color: var(--red);
    font-weight: 600;
}

.toc__list {
    list-style: none;
    padding: 0;
    margin: 0;
    border-top: 1px solid var(--line);
}
.toc__item {
    display: grid;
    grid-template-columns: 70px 1fr auto;
    gap: var(--s-4);
    align-items: baseline;
    padding: var(--s-5) 0;
    border-bottom: 1px solid var(--line);
    transition:
        padding-left 400ms var(--ease),
        background 300ms var(--ease);
}
.toc__item:hover {
    background: var(--bg-2);
    padding-left: var(--s-3);
}
.toc__item:hover .toc__title {
    color: var(--red);
}
.toc__item:hover .toc__arrow {
    transform: translateX(4px);
    color: var(--red);
}
.toc__num {
    font-family: var(--f-mono);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--fg-muted);
    letter-spacing: 0.06em;
}
.toc__title {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: clamp(1.25rem, 2.5vw, 1.875rem);
    letter-spacing: -0.025em;
    line-height: 1.1;
    color: var(--fg);
    transition: color 260ms var(--ease);
}
.toc__desc {
    display: none;
    font-size: var(--fs-sm);
    color: var(--fg-muted);
    max-width: 36ch;
}
.toc__arrow {
    font-family: var(--f-mono);
    font-size: var(--fs-sm);
    color: var(--fg-muted);
    transition:
        transform 400ms var(--ease),
        color 260ms var(--ease);
    display: inline-block;
}

@media (min-width: 900px) {
    .toc__item {
        grid-template-columns: 90px 1fr 1fr auto;
        gap: var(--s-6);
        align-items: center;
    }
    .toc__desc {
        display: block;
    }
}

/* ─── Chapters ─────────────────────────────────────────────────────── */
.chapter {
    padding: var(--s-12) 0;
    position: relative;
    scroll-margin-top: 100px;
}
.chapter--tight {
    padding: var(--s-10) 0;
}

.chapter__head {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-4);
    margin-bottom: var(--s-8);
    padding-bottom: var(--s-4);
    border-bottom: 1px solid var(--fg);
}
.chapter__head-top {
    display: flex;
    justify-content: space-between;
    gap: var(--s-3);
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--fg-muted);
    flex-wrap: wrap;
}
.chapter__head-top b {
    color: var(--red);
    font-weight: 600;
}
.chapter__title {
    margin: 0;
    font-family: var(--f-display);
    font-weight: 800;
    font-size: var(--fs-2xl);
    line-height: 0.9;
    letter-spacing: -0.035em;
    text-wrap: balance;
}
.chapter__title .red {
    color: var(--red);
}
.chapter__lead {
    margin: var(--s-4) 0 0;
    font-family: var(--f-display);
    font-weight: 400;
    font-size: var(--fs-lg);
    line-height: 1.35;
    color: var(--fg-soft);
    max-width: 58ch;
    text-wrap: pretty;
}

/* ─── Spec (labeled specimen box) ─────────────────────────────────── */
.spec {
    display: grid;
    grid-template-columns: 1fr;
    border: 1px solid var(--line);
    background: var(--bg);
    margin-bottom: var(--s-4);
}
.spec__label {
    display: flex;
    justify-content: space-between;
    gap: var(--s-3);
    padding: 10px 14px;
    border-bottom: 1px solid var(--line);
    background: var(--bg-2);
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--fg-muted);
    flex-wrap: wrap;
}
.spec__label b {
    color: var(--fg);
    font-weight: 500;
}
.spec__label .red {
    color: var(--red);
    font-weight: 500;
}
.spec__body {
    padding: var(--s-6);
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}
.spec__body--center {
    align-items: center;
    justify-content: center;
}
.spec__body--pad-lg {
    padding: var(--s-8) var(--s-6);
}
.spec__body--flush {
    padding: 0;
}

/* Grid utilities for specimen layouts */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-4);
}
.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-4);
}
@media (min-width: 640px) {
    .grid-2 {
        grid-template-columns: 1fr 1fr;
    }
    .grid-3 {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

/* ─── §01 Identity ─────────────────────────────────────────────────── */
.pos {
    display: grid;
    gap: var(--s-6);
}
.pos__block {
    padding: var(--s-6);
    border: 1px solid var(--line);
    background: var(--bg-2);
}
.pos__block h4 {
    margin: 0 0 var(--s-3);
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--red);
}
.pos__block ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 10px;
}
.pos__block li {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 10px;
    font-family: var(--f-display);
    font-size: var(--fs-md);
    line-height: 1.35;
}
.pos__block li::before {
    content: attr(data-bullet);
    font-family: var(--f-mono);
    font-size: 0.75rem;
    color: var(--red);
    font-weight: 600;
    padding-top: 0.35em;
}
@media (min-width: 760px) {
    .pos {
        grid-template-columns: 1fr 1fr;
        gap: var(--s-5);
    }
}

/* ─── §02 Wordmark ─────────────────────────────────────────────────── */
.mark {
    display: inline-block;
    font-family: var(--f-mono);
    font-weight: 500;
    letter-spacing: -0.01em;
    text-transform: lowercase;
}
.mark b {
    font-weight: 600;
}
.mark .dot {
    color: var(--red);
    font-weight: 700;
}

.mark--xl {
    font-size: clamp(3rem, 8vw, 6rem);
    letter-spacing: -0.04em;
}
.mark--lg {
    font-size: 2.25rem;
    letter-spacing: -0.025em;
}
.mark--md {
    font-size: 1.25rem;
}
.mark--sm {
    font-size: 0.9rem;
    letter-spacing: 0.02em;
}
.mark--xs {
    font-size: 0.72rem;
    letter-spacing: 0.04em;
}

.mark-anatomy {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-8);
    align-items: baseline;
}
.mark-anatomy-item {
    position: relative;
}
.mark-anatomy-item::after {
    content: attr(data-note);
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    font-family: var(--f-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--fg-muted);
    white-space: nowrap;
}

.mark-grounds {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}
.mark-ground {
    padding: var(--s-8) var(--s-5);
    display: flex;
    align-items: center;
    justify-content: center;
}
.mark-ground--paper {
    background: var(--bg);
}
.mark-ground--ink {
    background: var(--ink);
    color: oklch(96% 0.003 100);
}
.mark-ground--ink .mark .dot {
    color: var(--red-hi);
}
.mark-ground--red {
    background: var(--red);
    color: oklch(8% 0.008 260);
}
.mark-ground--red .mark .dot {
    color: oklch(8% 0.008 260);
}

@media (min-width: 640px) {
    .mark-grounds {
        grid-template-columns: repeat(3, 1fr);
    }
}

.mark-donts {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}
.mark-dont {
    padding: var(--s-6);
    background: var(--bg);
    display: grid;
    gap: var(--s-3);
    align-content: center;
    min-height: 120px;
}
.mark-dont__label {
    font-family: var(--f-mono);
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--red);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.mark-dont__label::before {
    content: "✕";
    color: var(--red);
    font-weight: 700;
}
.mark-dont .mark {
    opacity: 0.85;
}
.mark-dont--stretch .mark {
    transform: scaleX(1.6);
    transform-origin: left;
}
.mark-dont--rotate .mark {
    transform: rotate(-6deg);
    display: inline-block;
}
.mark-dont--outline .mark {
    -webkit-text-stroke: 1px var(--fg);
    color: transparent;
}
.mark-dont--recolor .mark .dot {
    color: oklch(50% 0.18 220);
}

@media (min-width: 640px) {
    .mark-donts {
        grid-template-columns: 1fr 1fr;
    }
}

/* ─── §03 Typography ───────────────────────────────────────────────── */
.type-specimen {
    padding: var(--s-6);
    display: grid;
    gap: var(--s-5);
}
.type-specimen__chars {
    font-weight: 800;
    font-size: clamp(5rem, 18vw, 13rem);
    line-height: 0.82;
    letter-spacing: -0.05em;
    margin: 0;
}
.type-specimen--display .type-specimen__chars {
    font-family: var(--f-display);
}
.type-specimen--body .type-specimen__chars {
    font-family: var(--f-body);
    font-weight: 700;
}
.type-specimen--mono .type-specimen__chars {
    font-family: var(--f-mono);
    font-weight: 600;
    font-size: clamp(4rem, 14vw, 11rem);
    letter-spacing: -0.02em;
}
.type-specimen__chars .red {
    color: var(--red);
}

.type-weights {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
    font-family: var(--f-display);
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    line-height: 1.1;
    letter-spacing: -0.025em;
}
.type-weights span {
    background: var(--bg);
    padding: var(--s-4);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--s-3);
}
.type-weights span::before {
    content: attr(data-label);
    font-family: var(--f-mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--fg-muted);
    align-self: center;
}
.type-weights--body {
    font-family: var(--f-body);
}
.type-weights--mono {
    font-family: var(--f-mono);
    font-size: clamp(1rem, 2vw, 1.25rem);
    letter-spacing: 0;
}

@media (min-width: 640px) {
    .type-weights {
        grid-template-columns: repeat(2, 1fr);
    }
}

.type-scale {
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    display: grid;
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}
.type-scale-row {
    background: var(--bg);
    display: grid;
    grid-template-columns: 90px 1fr auto;
    gap: var(--s-4);
    align-items: baseline;
    padding: var(--s-3) var(--s-4);
}
.type-scale-row .token {
    color: var(--red);
    font-weight: 500;
    letter-spacing: 0.04em;
}
.type-scale-row .sample {
    font-family: var(--f-display);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1;
    color: var(--fg);
    text-transform: none;
}
.type-scale-row .value {
    color: var(--fg-muted);
    white-space: nowrap;
}

.type-hier {
    padding: var(--s-6);
    display: grid;
    gap: var(--s-3);
}
.type-hier .eyebrow {
    font-family: var(--f-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--red);
    font-weight: 600;
}
.type-hier h4 {
    margin: 0;
    font-family: var(--f-display);
    font-weight: 800;
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    letter-spacing: -0.035em;
    line-height: 0.95;
}
.type-hier p {
    margin: 0;
    font-family: var(--f-body);
    font-size: var(--fs-md);
    line-height: 1.55;
    max-width: 58ch;
    color: var(--fg-soft);
}
.type-hier pre {
    margin: 0;
    font-family: var(--f-mono);
    font-size: var(--fs-sm);
    color: var(--fg-muted);
    background: var(--bg-2);
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-left: 2px solid var(--red);
    overflow-x: auto;
}

/* ─── §04 Color ────────────────────────────────────────────────────── */
.swatches {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}
.swatch {
    background: var(--bg);
    padding: var(--s-4);
    display: grid;
    grid-template-columns: 48px 1fr auto;
    align-items: center;
    gap: var(--s-4);
}
.swatch__chip {
    width: 48px;
    height: 48px;
    border: 1px solid color-mix(in oklab, var(--fg) 10%, transparent);
}
.swatch__name {
    font-family: var(--f-mono);
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--fg);
    letter-spacing: 0.02em;
}
.swatch__name span {
    display: block;
    font-size: 0.7rem;
    color: var(--fg-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 400;
    margin-bottom: 2px;
}
.swatch__value {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    color: var(--fg-muted);
    text-align: right;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

@media (min-width: 640px) {
    .swatches--2col {
        grid-template-columns: 1fr 1fr;
    }
}

.color-header {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-3);
    padding: var(--s-4);
    border: 1px solid var(--fg);
    margin-bottom: var(--s-4);
}
.color-header h4 {
    margin: 0;
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--red);
}
.color-header p {
    margin: 0;
    font-family: var(--f-display);
    font-size: var(--fs-md);
    line-height: 1.3;
    max-width: 52ch;
}

.hero-color {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
    margin-bottom: var(--s-6);
}
.hero-color__tile {
    padding: var(--s-8) var(--s-5);
    display: grid;
    grid-template-rows: 1fr auto;
    gap: var(--s-6);
    min-height: 220px;
    font-family: var(--f-mono);
}
.hero-color__tile--paper {
    background: var(--bg);
    color: var(--fg);
}
.hero-color__tile--ink {
    background: var(--ink);
    color: oklch(96% 0.003 100);
}
.hero-color__tile--red {
    background: var(--red);
    color: oklch(10% 0.008 260);
}

.hero-color__num {
    font-family: var(--f-display);
    font-weight: 800;
    font-size: clamp(3rem, 8vw, 6rem);
    letter-spacing: -0.055em;
    line-height: 0.82;
}
.hero-color__meta {
    display: grid;
    gap: 6px;
    font-size: var(--fs-xs);
    letter-spacing: 0.06em;
}
.hero-color__meta b {
    font-weight: 600;
    display: block;
    margin-bottom: 2px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.hero-color__meta span {
    opacity: 0.75;
}

@media (min-width: 760px) {
    .hero-color {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ─── §05 Elements ─────────────────────────────────────────────────── */
.el-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-4) var(--s-5);
    align-items: center;
}
.el-tag {
    font-family: var(--f-mono);
    font-size: var(--fs-sm);
    font-weight: 500;
}
.el-tag--agent {
    color: var(--fg);
}
.el-tag--agent em {
    color: var(--red);
    font-style: normal;
    font-weight: 600;
}
.el-tag--rule {
    color: var(--red);
    font-weight: 600;
    letter-spacing: 0.06em;
}
.el-tag--sec {
    color: var(--fg-muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.el-tag--sec b {
    color: var(--red);
    font-weight: 600;
}

/* ─── §06 Layout ────────────────────────────────────────────────────── */
.space-scale {
    display: grid;
    gap: 6px;
    font-family: var(--f-mono);
    font-size: var(--fs-sm);
}
.space-row {
    display: grid;
    grid-template-columns: 70px 1fr 70px;
    gap: var(--s-3);
    align-items: center;
}
.space-row .lbl {
    color: var(--red);
    font-weight: 500;
    letter-spacing: 0.04em;
}
.space-row .val {
    color: var(--fg-muted);
    text-align: right;
    font-size: var(--fs-xs);
}
.space-row .bar {
    height: 8px;
    background: var(--fg);
}

.grid-demo {
    position: relative;
    border: 1px solid var(--fg);
    background: var(--bg-2);
    padding: var(--s-6) var(--s-5);
    overflow: hidden;
}
.grid-demo__cols {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 8px;
    height: 120px;
}
.grid-demo__col {
    background: var(--red-ghost);
    border: 1px solid color-mix(in oklab, var(--red) 30%, transparent);
}
.grid-demo__label {
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    color: var(--fg-muted);
    margin-top: var(--s-3);
    display: flex;
    justify-content: space-between;
    gap: var(--s-3);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    flex-wrap: wrap;
}
.grid-demo__label b {
    color: var(--fg);
    font-weight: 500;
}

/* ─── §07 Motion ────────────────────────────────────────────────────── */
.motion-curve {
    background: var(--bg);
    padding: var(--s-6);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-5);
    align-items: center;
}
.motion-curve svg {
    width: 100%;
    max-width: 280px;
    height: auto;
}
.motion-curve svg .curve {
    stroke: var(--red);
    stroke-width: 2.5;
    fill: none;
}
.motion-curve svg .axis {
    stroke: var(--line-2);
    stroke-width: 1;
}
.motion-curve svg .ref {
    stroke: var(--fg-muted);
    stroke-width: 0.75;
    stroke-dasharray: 2 3;
}

.motion-curve__meta {
    font-family: var(--f-mono);
    font-size: var(--fs-sm);
    display: grid;
    gap: 10px;
}
.motion-curve__meta dt {
    color: var(--red);
    font-weight: 600;
    font-size: var(--fs-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.motion-curve__meta dd {
    margin: 0 0 var(--s-3);
    color: var(--fg);
}
.motion-curve__meta code {
    font-family: var(--f-mono);
    background: var(--bg-2);
    padding: 2px 6px;
    border: 1px solid var(--line);
    font-size: 0.85em;
}

@media (min-width: 760px) {
    .motion-curve {
        grid-template-columns: 280px 1fr;
        gap: var(--s-8);
    }
}

.motion-durations {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}
.motion-dur {
    background: var(--bg);
    padding: var(--s-4);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--s-3);
    align-items: baseline;
}
.motion-dur span {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    color: var(--fg-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.motion-dur b {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--fg);
    letter-spacing: -0.02em;
}
.motion-dur em {
    grid-column: 1 / -1;
    color: var(--fg-soft);
    font-style: normal;
    font-size: var(--fs-sm);
    font-family: var(--f-body);
    margin-top: 4px;
}

@media (min-width: 640px) {
    .motion-durations {
        grid-template-columns: repeat(3, 1fr);
    }
}

.motion-principle {
    margin: 0;
    font-family: var(--f-display);
    font-weight: 700;
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    line-height: 1.25;
    letter-spacing: -0.025em;
    max-width: 48ch;
}
.motion-principle span {
    color: var(--red);
}

/* ─── §08 Voice (full-bleed red) ───────────────────────────────────── */
.voice {
    background: var(--red);
    color: oklch(8% 0.008 260);
    margin: var(--s-10) 0 0;
    padding: var(--s-12) 0;
    position: relative;
    overflow: hidden;
}
.voice::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(
        to right,
        color-mix(in oklab, #000 6%, transparent) 1px,
        transparent 1px
    );
    background-size: 48px 100%;
    opacity: 0.5;
    pointer-events: none;
}
.voice__plate {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--s-3);
    padding-bottom: var(--s-3);
    border-bottom: 1px solid oklch(8% 0.008 260);
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    position: relative;
    opacity: 0.85;
}
.voice__plate b {
    font-weight: 600;
    opacity: 1;
}

.voice__title {
    margin: var(--s-8) 0;
    font-family: var(--f-display);
    font-weight: 800;
    font-size: clamp(3rem, 10vw, 8rem);
    line-height: 0.82;
    letter-spacing: -0.055em;
    color: oklch(8% 0.008 260);
}

.voice__rules {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 1px;
    background: oklch(8% 0.008 260);
    border: 1px solid oklch(8% 0.008 260);
    position: relative;
}
.voice__rule {
    background: var(--red);
    padding: var(--s-5);
    display: grid;
    grid-template-columns: 60px 1fr;
    gap: var(--s-4);
    align-items: baseline;
    transition: background 260ms var(--ease);
}
.voice__rule:hover {
    background: var(--red-hi);
}
.voice__rule-num {
    font-family: var(--f-mono);
    font-size: var(--fs-sm);
    font-weight: 600;
    letter-spacing: 0.06em;
    color: oklch(8% 0.008 260);
    align-self: start;
    padding-top: 0.3em;
}
.voice__rule-text {
    margin: 0;
    font-family: var(--f-display);
    font-weight: 700;
    font-size: clamp(1.1rem, 2.5vw, 1.75rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: oklch(8% 0.008 260);
    max-width: 54ch;
}

.voice__tone {
    margin-top: var(--s-8);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-5);
}
.voice__tone-col h5 {
    margin: 0 0 var(--s-3);
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding-bottom: 6px;
    border-bottom: 1px solid oklch(8% 0.008 260);
}
.voice__tone-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 6px;
}
.voice__tone-col li {
    font-family: var(--f-display);
    font-size: var(--fs-md);
    line-height: 1.4;
    padding-left: 20px;
    position: relative;
}
.voice__tone-col li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 12px;
    height: 2px;
    background: oklch(8% 0.008 260);
}
.voice__tone-col--no li::before {
    transform: rotate(-45deg);
    top: 0.6em;
}
.voice__tone-col--no li::after {
    content: "";
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 12px;
    height: 2px;
    background: oklch(8% 0.008 260);
    transform: rotate(45deg);
}

@media (min-width: 640px) {
    .voice__tone {
        grid-template-columns: 1fr 1fr;
        gap: var(--s-6);
    }
}

/* ─── §09 Applications ──────────────────────────────────────────────── */
.app-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-4);
}
@media (min-width: 760px) {
    .app-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.favi {
    display: flex;
    gap: var(--s-4);
    align-items: flex-end;
    flex-wrap: wrap;
}
.favi-group {
    display: grid;
    gap: 4px;
    justify-items: center;
}
.favi-tile {
    display: grid;
    place-items: center;
    background: var(--fg);
    color: var(--bg);
    font-family: var(--f-mono);
    font-weight: 700;
    border-radius: 4px;
    position: relative;
}
.favi-tile::after {
    content: "";
    position: absolute;
    width: 18%;
    height: 18%;
    border-radius: 50%;
    background: var(--red);
    top: 58%;
    right: 15%;
}
.favi-tile--64 {
    width: 64px;
    height: 64px;
    font-size: 22px;
}
.favi-tile--48 {
    width: 48px;
    height: 48px;
    font-size: 18px;
}
.favi-tile--32 {
    width: 32px;
    height: 32px;
    font-size: 13px;
    border-radius: 3px;
}
.favi-tile--16 {
    width: 16px;
    height: 16px;
    font-size: 0;
    border-radius: 2px;
}
.favi-tile--16::after {
    width: 30%;
    height: 30%;
    top: 52%;
    right: 12%;
}
.favi-size {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    color: var(--fg-muted);
    margin-top: 6px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.byline {
    padding: var(--s-5);
    display: grid;
    gap: var(--s-3);
    border-top: 1px solid var(--fg);
    border-bottom: 1px solid var(--fg);
}
.byline__cat {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--red);
    font-weight: 600;
}
.byline__head {
    margin: 0;
    font-family: var(--f-display);
    font-weight: 800;
    font-size: clamp(1.5rem, 3vw, 2rem);
    letter-spacing: -0.03em;
    line-height: 1;
}
.byline__meta {
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.06em;
    color: var(--fg-muted);
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-3);
}
.byline__meta b {
    color: var(--fg);
    font-weight: 500;
}
.byline__meta .by {
    color: var(--red);
}

.ogcard {
    aspect-ratio: 1200 / 630;
    background: var(--ink);
    color: oklch(96% 0.003 100);
    padding: var(--s-5);
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: var(--s-3);
    overflow: hidden;
}
.ogcard__top {
    display: flex;
    justify-content: space-between;
    font-family: var(--f-mono);
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0.7;
}
.ogcard__top b {
    color: var(--red-hi);
    font-weight: 600;
    opacity: 1;
}
.ogcard__head {
    font-family: var(--f-display);
    font-weight: 800;
    font-size: clamp(1.5rem, 4vw, 3rem);
    line-height: 0.95;
    letter-spacing: -0.035em;
    align-self: end;
    text-wrap: balance;
}
.ogcard__head .red {
    color: var(--red-hi);
}
.ogcard__bot {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    opacity: 0.7;
    text-transform: lowercase;
    display: flex;
    justify-content: space-between;
}
.ogcard__bot b {
    font-weight: 600;
    opacity: 1;
}
.ogcard__bot .dot {
    color: var(--red-hi);
}

.emailsig {
    padding: var(--s-5);
    font-family: var(--f-body);
    font-size: var(--fs-sm);
    display: grid;
    gap: 4px;
    border-left: 2px solid var(--red);
    background: var(--bg-2);
}
.emailsig b {
    font-family: var(--f-display);
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.02em;
    color: var(--fg);
}
.emailsig span {
    color: var(--fg-muted);
    font-family: var(--f-mono);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
}
.emailsig a {
    color: var(--red);
    font-family: var(--f-mono);
    font-size: 0.78rem;
}

.fourofour {
    padding: var(--s-8) var(--s-5);
    display: grid;
    gap: var(--s-4);
    text-align: center;
    place-items: center;
}
.fourofour h5 {
    margin: 0;
    font-family: var(--f-display);
    font-weight: 800;
    font-size: clamp(3rem, 10vw, 7rem);
    letter-spacing: -0.055em;
    line-height: 0.82;
}
.fourofour h5 .red {
    color: var(--red);
}
.fourofour p {
    margin: 0;
    font-family: var(--f-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--fg-muted);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .cover__title .line > span {
        transform: none;
    }
    .cover__bottom {
        opacity: 1;
    }
}