:root {
    --accent: #1a56db;
    --accent-soft: #e8f0fe;
    --accent-dark: #c2c2c9;
    --ink: #2c2c2c;
    --muted: #666666;
    --line: #e0e0e0;
    --line-strong: #d0d0d0;
    --bg: #fafafa;
    --surface: #ffffff;
    --surface-2: rgba(0, 0, 0, 0.04);
    --max: 880px;
    --nav-max: 1080px;
    --highlight: #1a56db;
    --btn-bg: #2c2c2c;
    --btn-text: #ffffff;
    --shadow: rgba(0, 0, 0, 0.1);
    --section-tone-a: #fafafa;
    --section-tone-b: #f2f6fd;
}

[data-theme="dark"] {
    --accent: #ff4d4f;
    --accent-soft: #3a1518;
    --accent-dark: #c9c3c2;
    --ink: #e0e0e0;
    --muted: #a0a0a0;
    --line: #3a3a4a;
    --line-strong: #4a4a5a;
    --bg: #222228;
    --surface: #2a2a32;
    --surface-2: rgba(255, 255, 255, 0.04);
    --highlight: #ff4d4f;
    --btn-bg: #d0d0d0;
    --btn-text: #222228;
    --shadow: rgba(0, 0, 0, 0.3);
    --section-tone-a: #222228;
    --section-tone-b: #282832;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --accent: #ff4d4f;
        --accent-soft: #3a1518;
        --accent-dark: #c9c3c2;
        --ink: #e0e0e0;
        --muted: #a0a0a0;
        --line: #3a3a4a;
        --line-strong: #4a4a5a;
        --bg: #222228;
        --surface: #2a2a32;
        --surface-2: rgba(255, 255, 255, 0.04);
        --highlight: #ff4d4f;
        --btn-bg: #d0d0d0;
        --btn-text: #222228;
        --shadow: rgba(0, 0, 0, 0.3);
        --section-tone-a: #222228;
        --section-tone-b: #282832;
    }
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 50px;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--bg);
    font-family:
        "Noto Sans",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;
    line-height: 1.6;
    font-size: 15px;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.wrap {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 22px;
}

nav.top {
    position: sticky;
    top: 0;
    z-index: 100;
    background: color-mix(in srgb, var(--bg) 90%, transparent);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    padding: 8px 22px;
    font-size: 0.88rem;
    transition: all 0.4s ease;
}

[data-theme="dark"] nav.top {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

nav.top .wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--nav-max);
}

nav.top .brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--ink);
    text-decoration: none;
}

nav.top .brand:hover {
    color: var(--accent);
}

nav.top .brand-icon {
    width: 28px;
    height: 28px;
    background: none;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

nav.top .brand-icon svg,
nav.top .brand-icon img {
    width: 24px;
    height: 24px;
    fill: var(--bg);
    object-fit: contain;
}

nav.top ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 24px;
}

nav.top ul li a {
    color: var(--muted);
    font-weight: 500;
    transition: all 0.25s ease;
    text-decoration: none;
    position: relative;
    padding: 6px 0;
}

nav.top ul li a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    transition: width 0.25s ease;
}

nav.top ul li a:hover {
    color: var(--accent);
}

nav.top ul li a:hover::after {
    width: 100%;
}

nav.top ul li a.active {
    color: var(--accent);
    font-weight: 600;
}

nav.top ul li a.active::after {
    width: 100%;
}

.venue-badge {
    background: var(--accent);
    color: var(--bg);
    padding: 4px 12px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
}

.nav-divider {
    width: 1px;
    height: 20px;
    background: var(--line);
}

.theme-toggle {
    background: transparent;
    border: none;
    color: var(--muted);
    width: 34px;
    height: 34px;
    border-radius: 7px;
    cursor: pointer;
    display: grid;
    place-items: center;
    transition:
        color 0.18s ease,
        background 0.18s ease;
}

.theme-toggle:hover {
    color: var(--ink);
    background: var(--surface-2);
}

.theme-toggle svg {
    width: 17px;
    height: 17px;
}

.theme-toggle .sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .sun {
    display: block;
}

[data-theme="dark"] .theme-toggle .moon {
    display: none;
}

header.hero {
    text-align: center;
    padding: 34px 22px 20px;
    border-bottom: 1px solid var(--line);
    background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 5%, var(--bg)), var(--bg) 78%);
    transition: background 0.4s ease;
}

.venue {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 5px;
    font-weight: 700;
}

h1.title {
    font-family:
        "Google Sans",
        "Noto Sans",
        -apple-system,
        "Segoe UI",
        Roboto,
        sans-serif;
    font-size: 2.2rem;
    line-height: 1.25;
    margin: 0 auto 12px;
    max-width: 1000px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.authors {
    font-size: 1.08rem;
    margin: 6px 0 4px;
}

.authors a {
    color: var(--ink);
    text-decoration: none;
    transition: color 0.2s;
}

.authors a:hover {
    color: var(--accent);
    opacity: 0.8;
}

.affil {
    color: var(--muted);
    font-size: 0.96rem;
    margin-bottom: 14px;
}

.affil sup {
    color: var(--muted);
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-top: 10px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--btn-bg);
    color: var(--btn-text);
    padding: 11px 20px;
    border-radius: 40px;
    font-size: 0.96rem;
    font-weight: 600;
    transition:
        transform 0.08s ease,
        background 0.15s ease,
        box-shadow 0.15s ease;
    box-shadow: 0 2px 8px var(--shadow);
}

.btn:hover {
    background: var(--accent);
    color: var(--bg);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--shadow);
}

.btn:hover svg,
.btn:hover i {
    color: var(--bg);
    fill: var(--bg);
}

.btn svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.btn i {
    color: var(--btn-text);
}

section {
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

section:last-of-type {
    border-bottom: none;
}

h2 {
    font-family:
        "Google Sans",
        "Noto Sans",
        -apple-system,
        sans-serif;
    font-size: 1.2rem;
    margin: 0 0 18px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

h3 {
    font-family:
        "Google Sans",
        "Noto Sans",
        -apple-system,
        sans-serif;
    font-size: 1rem;
    font-weight: 700;
    margin: 28px 0 10px;
}

h2::before {
    content: "";
    display: inline-block;
    width: 26px;
    height: 4px;
    background: var(--accent);
    border-radius: 3px;
    vertical-align: middle;
    margin-right: 12px;
}

p {
    margin: 0 0 16px;
    text-align: justify;
    hyphens: auto;
    word-spacing: normal;
    word-break: break-word;
    overflow-wrap: break-word;
}

.teaser figure {
    margin: 0;
}

.teaser img,
.teaser canvas {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 10px;
    display: block;
}

.teaser-compact {
    padding: 0px 0;
}

figcaption {
    text-align: center;
    margin-top: 13px;
    font-family:
        "Noto Sans",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;
    font-size: 11.5px;
    color: var(--muted);
}

.placeholder {
    width: 100%;
    aspect-ratio: 16 / 8;
    border: 2px dashed var(--line);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--muted);
    font-size: 0.95rem;
    padding: 20px;
    background: #fafafa;
}

.img-placeholder {
    background: var(--surface-2);
    padding: 0px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;

    position: absolute;
    border: none;
    border-radius: 14px;
    inset: 0;

    gap: 7px;
    z-index: 0;
}

.img-placeholder::before {
    content: "";
    position: absolute;
    inset: 0;

    background-image: radial-gradient(circle at 1px 1px, var(--line) 1px, transparent 0);
    background-size: 16px 16px;
    opacity: 0.8;

    z-index: 0;
}

.img-placeholder>div {
    position: relative;
    z-index: 1;
    display: center;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.img-placeholder .icon {
    width: 30px;
    height: 30px;
    /* background: var(--bg); */

    display: grid;
    place-items: center;
    /* justify-content: center; */

    /* border: 1px dashed var(--line-strong); */
    border-radius: 8px;
    /* color: var(--ink); */
    margin-bottom: 2px;
}

.img-placeholder .icon svg {
    width: 16px;
    height: 16px;
}

.img-placeholder .filename {
    color: var(--muted);
    font-size: 0.85rem;
    font-family: "SFMono-Regular", Consolas, monospace;
    text-align: center;
}

.img-placeholder .label {
    color: var(--muted);
    font-size: 0.8rem;
    font-family:
        "Noto Sans",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;
    text-align: center;
}

/* Unified image Loading surface across Gallery, Method, Compare and lazy media. */
.cage-loading-surface {
    --cage-loading-progress-width: min(180px, calc(100% - 40px));
    --cage-loading-progress-height: 5px;
    color: var(--muted);
    background-color: var(--surface-2);
    background-image: radial-gradient(circle at 1px 1px, color-mix(in srgb, var(--line) 86%, transparent) 1px, transparent 1.15px);
    background-size: 16px 16px;
}

.img-placeholder.cage-loading-surface::before { display: none; }

.cage-loading-surface .icon {
    width: 30px !important;
    height: 30px !important;
    display: grid !important;
    place-items: center !important;
    margin: 0 0 1px !important;
    padding: 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    color: var(--accent) !important;
}

.cage-loading-surface .icon i,
.cage-loading-surface .icon svg {
    width: 18px !important;
    height: 18px !important;
    font-size: 18px !important;
}

.cage-loading-surface .filename,
.cage-loading-surface .cage-loading-title {
    max-width: calc(100% - 24px);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--ink) !important;
    font-family: inherit !important;
    font-size: 0.82rem !important;
    font-weight: 600;
    line-height: 1.2;
    text-align: center;
}

.cage-loading-surface .progress-bar,
.cage-loading-surface .cage-loading-progress {
    position: relative;
    width: var(--cage-loading-progress-width) !important;
    height: var(--cage-loading-progress-height) !important;
    margin: 2px 0 0;
    overflow: hidden;
    flex: 0 0 auto;
    border: 0 !important;
    border-radius: 999px !important;
    background: color-mix(in srgb, var(--line) 78%, var(--surface)) !important;
}

.cage-loading-surface .progress-bar-fill,
.cage-loading-surface .cage-loading-progress-fill {
    width: 0%;
    height: 100%;
    border-radius: inherit;
    background: var(--accent) !important;
    transition: width 0.14s linear;
}

.cage-loading-surface .progress-bar.is-indeterminate .progress-bar-fill,
.cage-loading-surface .cage-loading-progress.is-indeterminate .cage-loading-progress-fill {
    width: 34% !important;
    animation: cage-loading-progress-indeterminate 1.15s ease-in-out infinite;
}

.cage-loading-surface .label,
.cage-loading-surface .progress-text,
.cage-loading-surface .cage-loading-value {
    color: var(--muted) !important;
    font-family: inherit !important;
    font-size: 0.74rem !important;
    font-weight: 500;
    line-height: 1.2;
    text-align: center;
}

@keyframes cage-loading-progress-indeterminate {
    0% { transform: translateX(-115%); }
    55% { transform: translateX(105%); }
    100% { transform: translateX(295%); }
}

section.tldr {
    border-bottom: none;
    padding-bottom: 8px;
}

.tldr-box {
    background: var(--accent-soft);
    border-radius: 12px;
    padding: 20px 24px;
}

.tldr-box h2 {
    margin: 0 0 8px;
}

.tldr-box h2::before {
    background: var(--accent-dark);
}

.tldr-box p {
    margin: 0;
}

figure.fig {
    margin: 8px 0 0;
}

figure.fig .img-container {
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    position: relative;
    overflow: hidden;
}

figure .img-container {
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    position: relative;
    overflow: hidden;
}

figure.fig .img-container img {
    width: 100%;
    height: auto;
    border-radius: 14px;
    display: block;
}


.accordion {
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 16px;
}

.accordion.accordion-no-border {
    border: none;
    border-radius: 0;
    overflow: visible;
}

.accordion.accordion-no-border .accordion-item {
    border-bottom: none;
    margin-bottom: 12px;
}

.accordion.accordion-no-border .accordion-item:last-child {
    margin-bottom: 0;
}

.accordion-item {
    border-bottom: 1px solid var(--line);
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--surface-2);
    cursor: pointer;
    transition: background 0.3s ease;
}

.accordion-header:hover {
    background: var(--accent-soft);
}

.accordion-header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
}

.accordion-icon {
    font-size: 0.8rem;
    color: var(--muted);
    transition: transform 0.3s ease;
}

.accordion-header.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    background: var(--bg);
}

.accordion-content.open {
    max-height: 5000px;
}

.accordion-content-inner {
    padding: 16px 20px;
}

.accordion-sticky-header {
    position: fixed;
    top: 56px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: var(--nav-max);
    z-index: 90;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: color-mix(in srgb, var(--surface-2) 95%, transparent);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--line);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.accordion-sticky-header.visible {
    opacity: 1;
    pointer-events: auto;
}

.accordion-sticky-header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
}

.accordion-sticky-header .accordion-icon {
    font-size: 0.8rem;
    color: var(--muted);
    transition: transform 0.3s ease;
}

.accordion-item.sticky-header-item .accordion-header {
    position: sticky;
    top: 56px;
    z-index: 80;
    background: color-mix(in srgb, var(--surface-2) 95%, transparent);
    backdrop-filter: blur(20px) saturate(180%);
}

.accordion-item.sticky-header-item .accordion-header.stuck {
    box-shadow: 0 4px 20px -10px rgba(0, 0, 0, 0.15);
}

.table-wrap {
    overflow-x: auto;
}

table.results {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

table.results th,
table.results td {
    padding: 6px 12px;
    text-align: center;
    border-bottom: 1px solid var(--line);
    white-space: nowrap;
}

table.results th:first-child,
table.results td:first-child {
    text-align: left;
}

table.results thead th {
    border-bottom: 2px solid var(--ink);
    font-weight: 700;
}

table.results tbody tr.mine {
    background: var(--accent-soft);
}

table.results tbody tr.mine td {
    font-weight: 700;
}

table.results tbody tr.upper td {
    color: var(--muted);
}

table.results.acc tbody tr.upper td {
    border-bottom: 2px dashed #b9b9b9;
}

table.results tbody tr.dashed-top td {
    border-top: 2px dashed #b9b9b9;
}

table.results caption {
    caption-side: bottom;
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 12px;
    text-align: left;
    line-height: 1.5;
}

table.results td:first-child a {
    color: var(--ink);
}

table.results td:first-child a:hover {
    color: var(--accent);
}

.takeaways-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 8px;
}

.takeaways-grid.custom-width {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.problem-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 16px;
}

.tldr {
    background: var(--accent-soft);
    border-radius: 14px;
    padding: 12px 24px 18px 24px;
    margin: 12px 0;
    border-left: 4px solid var(--accent);
}

.highlight {
    color: var(--accent);
    font-weight: 600;
}

.tldr h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
    margin: 0 0 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tldr p {
    font-size: 0.95rem;
    color: var(--ink);
    margin: 0;
    line-height: 1.6;
    text-align: justify;
    hyphens: auto;
    word-spacing: normal;
    word-break: break-word;
    overflow-wrap: break-word;
}

.problem-card {
    background: var(--surface-2);
    border-radius: 14px;
    padding: 24px;
    border: 1px solid var(--line);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.problem-card:hover {
    background: var(--accent-soft);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow:
        0 12px 30px rgba(0, 0, 0, 0.08),
        0 2px 8px rgba(0, 0, 0, 0.04);
}

.problem-card .card-index {
    color: var(--accent);
    font-weight: 700;
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    position: relative;
    z-index: 1;
    text-transform: uppercase;
}

.problem-card .ghost-number {
    position: absolute;
    right: -6px;
    bottom: -9px;
    z-index: 0;
    color: color-mix(in srgb, var(--bg) 80%, transparent);
    font-size: 5rem;
    line-height: 1;
    font-weight: 900;
    pointer-events: none;
    z-index: 0;
}

.problem-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 10px;
    color: var(--ink);
    position: relative;
    z-index: 1;
}

.problem-card p {
    font-size: 0.9rem;
    color: var(--muted);
    margin: 0;
    line-height: 1.6;
    text-align: justify;
    hyphens: auto;
    word-spacing: normal;
    word-break: break-word;
    overflow-wrap: break-word;
    position: relative;
    z-index: 1;
}

.takeaway {
    background: var(--surface);
    border-radius: 12px;
    padding: 16px;
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 1px solid var(--line);
    overflow: hidden;
    text-align: center;
}

.takeaway:hover {
    background: color-mix(in srgb, var(--accent-soft) 50%, var(--surface));
    transform: translateY(-2px);
    box-shadow: 0 8px 24px -8px rgba(0, 0, 0, 0.1);
    border-color: color-mix(in srgb, var(--accent) 30%, var(--line));
}

.takeaway-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    color: var(--accent);
    margin: 0 auto 10px;
    font-size: 1.0rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.takeaway:hover .takeaway-icon {
    background: var(--accent);
    color: #fff;
    transform: scale(1.08);
}

.takeaway h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 0 6px;
    color: var(--ink);
    letter-spacing: -0.01em;
}

.takeaway p {
    font-size: 0.65rem;
    color: var(--muted);
    margin: 0;
    text-align: center;
    line-height: 1.5;
    font-weight: 500;
}

.method-lead {
    margin: 0 0 16px;
    color: var(--muted);
    font-size: 1rem;
}

.parameter-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin: 18px 0 14px;
}

.parameter-item {
    padding: 15px 16px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface-2);
}

.parameter-item strong {
    display: block;
    margin-bottom: 5px;
    color: var(--ink);
    font-size: 0.9rem;
}

.parameter-item span {
    display: block;
    color: var(--muted);
    font-size: 0.82rem;
    line-height: 1.45;
}

.method-note.compact {
    margin: 0 0 26px;
    padding: 12px 15px;
    border-left: 3px solid var(--accent);
    border-radius: 0 9px 9px 0;
    color: var(--muted);
    background: var(--accent-soft);
    font-size: 0.84rem;
    line-height: 1.5;
}

.transform-flow {
    counter-reset: transform-step;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
}

.transform-flow li {
    position: relative;
    isolation: isolate;
    overflow: hidden;

    padding: 15px 14px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface-2);
}

.transform-flow li>strong,
.transform-flow li>span {
    position: relative;
    z-index: 2;
}

/* .transform-flow li::before {
      content: counter(transform-step);
      position: absolute;
      top: 13px;
      left: 14px;
      width: 21px;
      height: 21px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: var(--bg);
      background: var(--accent);
      font-size: .7rem;
      font-weight: 700;
    } */

.transform-flow strong {
    display: block;
    margin-bottom: 5px;
    color: var(--ink);
    font-size: 0.85rem;
}

.transform-flow span {
    display: block;
    color: var(--muted);
    font-size: 0.78rem;
    line-height: 1.45;
    hyphens: auto;
    -webkit-hyphens: auto;
    -ms-hyphens: auto;
    text-align: justify;
    z-index: 1;
}

.transform-flow .ghost-number {
    position: absolute;
    right: -6px;
    bottom: -12px;
    z-index: 0;

    color: color-mix(in srgb, var(--accent) 8%, transparent);

    font-size: 5rem;
    font-weight: 900;
    line-height: 1;

    pointer-events: none;
    user-select: none;
}

.transform-cards {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    margin-top: 16px;
}

@media (max-width: 900px) {
    .transform-cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 560px) {
    .transform-cards {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .parameter-strip {
        grid-template-columns: 1fr;
    }

    .transform-flow {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .takeaways-grid.custom-width {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 560px) {
    .takeaways-grid.custom-width {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 460px) {
    .transform-flow {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 800px) {
    .arena-main-panel {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .arena-input-section {
        padding-right: 0;
        padding-bottom: 20px;
        border-bottom: 1px solid var(--line);
        width: 100%;
    }

    .arena-divider {
        display: none;
    }

    .arena-output-section {
        padding-left: 0;
        width: 100%;
    }

    .arena-image-box,
    .arena-card {
        width: 100%;
        max-width: 300px;
    }

    .arena-grid {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {

    .arena-image-box,
    .arena-card {
        width: 100%;
        max-width: none;
    }

    .arena-tip {
        font-size: 0.85rem;
        padding: 0 10px;
    }
}

/* Alternating full-width chapter surfaces. TL;DR + teaser count as the first chapter. */
.section-tone-group,
.wrap > section.tone-single,
.wrap > section.tone-double {
    position: relative;
    z-index: 0;
    isolation: isolate;
}

.section-tone-group {
    display: flow-root;
}

.section-tone-group::before,
.wrap > section.tone-single::before,
.wrap > section.tone-double::before {
    content: "";
    position: absolute;
    z-index: -1;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 100vw;
    transform: translateX(-50%);
}

.tone-single::before { background: var(--section-tone-a); }
.tone-double::before { background: var(--section-tone-b); }