:root {
    --paper: #f1eee6;
    --paper-bright: #fbfaf6;
    --paper-deep: #ddd7ca;
    --ink: #1d1d19;
    --ink-soft: #34332e;
    --muted: #6b685f;
    --line: rgba(29, 29, 25, 0.2);
    --line-light: rgba(241, 238, 230, 0.22);
    --vermilion: #b5412e;
    --vermilion-dark: #873022;
    --indigo: #253346;
    --focus: #1f5b9b;
    --content-width: 1120px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    overflow-x: hidden;
    background: var(--paper);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

body::before {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image:
        repeating-linear-gradient(90deg, transparent 0, transparent 3px, rgba(29, 29, 25, 0.012) 4px),
        repeating-linear-gradient(0deg, transparent 0, transparent 5px, rgba(29, 29, 25, 0.01) 6px);
    content: "";
    pointer-events: none;
}

body.modal-open {
    overflow: hidden;
}

button,
input {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    color: inherit;
}

a {
    color: inherit;
    text-underline-offset: 0.18em;
}

button:focus-visible,
input:focus-visible,
a:focus-visible,
summary:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

.page-shell {
    width: min(calc(100% - 48px), var(--content-width));
    margin: 0 auto;
}

.site-header {
    display: flex;
    min-height: 96px;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
}

.wordmark {
    display: inline-flex;
    align-items: center;
    gap: 13px;
    color: var(--ink);
    text-decoration: none;
}

.wordmark-seal {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    background: var(--vermilion);
    color: var(--paper-bright);
    font-family: "Noto Sans JP", sans-serif;
    font-size: 1.45rem;
    font-weight: 700;
    line-height: 1;
}

.wordmark-text {
    display: flex;
    flex-direction: column;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.08rem;
    font-weight: 700;
    line-height: 1.05;
}

.wordmark-text small {
    margin-top: 6px;
    color: var(--muted);
    font-family: Inter, ui-sans-serif, sans-serif;
    font-size: 0.66rem;
    font-weight: 650;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.help-button,
.text-button {
    padding: 0;
    border: 0;
    border-bottom: 1px solid currentColor;
    background: transparent;
    color: var(--ink);
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 720;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.help-button {
    padding: 10px 0 7px;
}

.help-button span {
    display: inline-block;
    margin-left: 8px;
    transition: transform 180ms ease;
}

.help-button:hover span {
    transform: translate(3px, -3px);
}

.hero {
    display: grid;
    min-height: 670px;
    align-items: center;
    gap: clamp(50px, 8vw, 120px);
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
    padding: 76px 0 92px;
    border-bottom: 1px solid var(--line);
}

.eyebrow,
.step-label {
    margin: 0;
    color: var(--vermilion-dark);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.17em;
    text-transform: uppercase;
}

.hero h1 {
    max-width: 780px;
    margin: 22px 0 30px;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(4.5rem, 7.4vw, 7rem);
    font-weight: 500;
    letter-spacing: -0.065em;
    line-height: 0.88;
}

.hero h1 em {
    color: var(--vermilion);
    font-weight: 400;
}

.subtitle {
    max-width: 670px;
    margin: 0;
    color: var(--ink-soft);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.18rem, 2vw, 1.45rem);
    line-height: 1.55;
}

.hero-note {
    max-width: 610px;
    margin: 34px 0 0;
    padding: 16px 0 0 26px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.9rem;
    position: relative;
}

.hero-note::before {
    position: absolute;
    top: 20px;
    left: 0;
    width: 8px;
    height: 8px;
    background: var(--vermilion);
    content: "";
}

.hero-note strong {
    color: var(--ink);
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 18px;
    margin-top: 24px;
    padding: 8px 0 5px;
    border-bottom: 1px solid currentColor;
    color: var(--vermilion-dark);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-decoration: none;
    text-transform: uppercase;
}

.hero-cta span {
    transition: transform 180ms ease;
}

.hero-cta:hover span {
    transform: translateY(4px);
}

.hero-mark {
    position: relative;
    width: min(100%, 350px);
    aspect-ratio: 0.84;
    justify-self: end;
    overflow: hidden;
    background: var(--ink);
    box-shadow: 18px 18px 0 var(--paper-deep);
    color: var(--paper-bright);
}

.hero-kanji {
    position: absolute;
    top: -47px;
    left: 8px;
    font-family: "fot-tsukuardgothic-std", "Noto Sans JP", sans-serif;
    font-size: clamp(10rem, 18vw, 15rem);
    font-weight: 700;
    letter-spacing: -0.15em;
    line-height: 1;
}

.hero-kanji-secondary {
    top: auto;
    right: 8px;
    bottom: -42px;
    left: auto;
    color: var(--paper);
}

.hero-stroke {
    position: absolute;
    top: 48%;
    right: -12%;
    left: -12%;
    height: 12px;
    background: var(--vermilion);
    transform: rotate(-7deg);
}

.hero-mark-small {
    position: absolute;
    z-index: 2;
    top: 24px;
    right: 23px;
    font-size: 0.66rem;
    font-weight: 750;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    writing-mode: vertical-rl;
}

.hero-mark-small-bottom {
    top: auto;
    right: auto;
    bottom: 26px;
    left: 24px;
}

.converter-section {
    padding: 100px 0 116px;
}

.section-heading {
    display: grid;
    align-items: start;
    gap: 36px;
    grid-template-columns: 145px 1fr;
    margin-bottom: 38px;
}

.section-heading h2,
.result-topline h2,
.info-intro h2 {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2.15rem, 4vw, 3.6rem);
    font-weight: 500;
    letter-spacing: -0.04em;
    line-height: 1.03;
}

.section-heading p:not(.step-label) {
    max-width: 600px;
    margin: 12px 0 0;
    color: var(--muted);
}

.input-section {
    padding: clamp(26px, 4vw, 48px);
    border: 1px solid var(--line);
    background: var(--paper-bright);
}

.input-section > label {
    display: block;
    margin-bottom: 11px;
    color: var(--ink);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.input-group {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
}

input[type="text"] {
    width: 100%;
    min-height: 68px;
    padding: 15px 22px;
    border: 1px solid var(--ink);
    border-right: 0;
    border-radius: 0;
    background: transparent;
    color: var(--ink);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.28rem;
    transition: background-color 180ms ease, box-shadow 180ms ease;
}

input[type="text"]::placeholder {
    color: #8b877d;
}

input[type="text"]:focus {
    background: #fff;
    box-shadow: inset 0 -3px 0 var(--vermilion);
    outline: 0;
}

input[type="text"][aria-invalid="true"] {
    border-color: var(--vermilion-dark);
    box-shadow: inset 0 -3px 0 var(--vermilion);
}

.convert-button {
    display: inline-flex;
    min-height: 68px;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    padding: 15px 26px;
    border: 1px solid var(--ink);
    border-radius: 0;
    background: var(--ink);
    color: var(--paper-bright);
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    transition: background-color 180ms ease, color 180ms ease;
}

.convert-button span {
    font-size: 1.45rem;
    font-weight: 400;
    transition: transform 180ms ease;
}

.convert-button:hover {
    background: var(--vermilion);
}

.convert-button:hover span {
    transform: translateX(4px);
}

.input-meta {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 20px;
    margin-top: 15px;
}

.input-meta p {
    margin: 0;
    color: var(--muted);
    font-size: 0.84rem;
}

.text-button {
    flex: 0 0 auto;
    color: var(--vermilion-dark);
    font-size: 0.7rem;
}

.input-error {
    min-height: 0;
    margin: 10px 0 0;
    color: var(--vermilion-dark);
    font-size: 0.85rem;
    font-weight: 700;
}

.input-error:empty {
    display: none;
}

.quick-examples {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 18px;
    margin-top: 27px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.8rem;
}

.quick-examples > span {
    color: var(--ink);
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.quick-examples button {
    padding: 2px 0;
    border: 0;
    border-bottom: 1px solid var(--line);
    background: transparent;
    cursor: pointer;
}

.quick-examples button:hover {
    border-color: var(--vermilion);
    color: var(--vermilion-dark);
}

.trust-line {
    margin: 20px 0 0;
    color: var(--muted);
    font-size: 0.7rem;
    letter-spacing: 0.03em;
}

.trust-line span {
    margin: 0 6px;
    color: var(--vermilion);
}

.loading {
    display: none;
    margin-top: 18px;
    padding: 14px 18px;
    border-left: 3px solid var(--vermilion);
    color: var(--muted);
    font-size: 0.86rem;
}

.loading.show {
    display: block;
}

.result-section {
    display: none;
    margin-top: 22px;
    padding: clamp(28px, 5vw, 56px);
    background: var(--ink);
    color: var(--paper);
}

.result-section.show {
    display: block;
    animation: reveal-result 420ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

@keyframes reveal-result {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-topline {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 28px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--line-light);
}

.result-topline .step-label {
    margin-bottom: 10px;
    color: #e07460;
}

.result-topline h2 {
    font-size: clamp(1.8rem, 3vw, 2.8rem);
}

.result-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 9px;
}

.secondary-button {
    padding: 10px 15px;
    border: 1px solid var(--line-light);
    border-radius: 0;
    background: transparent;
    color: var(--paper);
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 750;
    letter-spacing: 0.05em;
}

.secondary-button:hover {
    border-color: var(--paper);
    background: var(--paper);
    color: var(--ink);
}

.result-hero {
    display: grid;
    min-height: 300px;
    align-items: center;
    grid-template-columns: minmax(0, 1.2fr) minmax(220px, 0.8fr);
    border-bottom: 1px solid var(--line-light);
}

.kanji-display {
    position: relative;
    padding: 45px 35px 45px 0;
    border-right: 1px solid var(--line-light);
    color: var(--paper-bright);
    font-family: "fot-tsukuardgothic-std", "Noto Sans JP", sans-serif;
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1.05;
    text-wrap: balance;
}

.kanji-display-short {
    font-size: clamp(5.6rem, 11vw, 8.5rem);
}

.kanji-display-medium {
    font-size: clamp(4.5rem, 8vw, 6.5rem);
    letter-spacing: 0.025em;
}

.kanji-display-long {
    font-size: clamp(3.2rem, 5.4vw, 4.7rem);
    letter-spacing: 0.01em;
}

.kanji-display-extra-long {
    display: flex;
    align-items: flex-start;
    flex-direction: column;
    gap: 0.08em;
    font-size: clamp(3.2rem, 5.5vw, 4.8rem);
    letter-spacing: 0.02em;
}

.kanji-line {
    display: block;
    white-space: nowrap;
}

.kanji-glyph {
    display: inline-block;
    transform-origin: 50% 20%;
}

.result-section.is-revealing .kanji-glyph {
    animation: ink-glyph-reveal 660ms cubic-bezier(0.18, 0.78, 0.22, 1) both;
    animation-delay: calc(90ms + var(--glyph-index) * 68ms);
}

@keyframes ink-glyph-reveal {
    0% {
        opacity: 0;
        filter: blur(4px);
        clip-path: inset(0 0 100% 0);
        transform: translateY(0.18em) scale(0.985);
    }
    64% {
        opacity: 1;
        filter: blur(0.4px);
        clip-path: inset(0 0 0 0);
        transform: translateY(-0.025em) scale(1);
    }
    100% {
        opacity: 1;
        filter: blur(0);
        clip-path: inset(0 0 0 0);
        transform: translateY(0) scale(1);
    }
}

.result-section.is-revealing .result-reading {
    animation: result-support-reveal 480ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
    animation-delay: var(--result-meta-delay, 520ms);
}

.result-section.is-revealing .detail-card {
    animation: result-support-reveal 440ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
    animation-delay: calc(var(--result-meta-delay, 520ms) + 100ms + var(--detail-index) * 38ms);
}

@keyframes result-support-reveal {
    from {
        opacity: 0;
        transform: translateY(9px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-reading {
    padding: 35px 0 35px clamp(28px, 4vw, 52px);
}

.result-reading > span {
    display: block;
    margin-bottom: 13px;
    color: #a6a297;
    font-size: 0.67rem;
    font-weight: 750;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.pronunciation {
    color: var(--paper-bright);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.45rem, 3vw, 2.2rem);
    line-height: 1.2;
    text-transform: lowercase;
}

.meaning {
    margin-top: 18px;
    color: #bbb6aa;
    font-size: 0.88rem;
    line-height: 1.7;
}

.kanji-details {
    display: grid;
    gap: 0;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    margin-top: 36px;
    border-top: 1px solid var(--line-light);
    border-left: 1px solid var(--line-light);
}

.detail-card {
    min-height: 178px;
    padding: 20px;
    border-right: 1px solid var(--line-light);
    border-bottom: 1px solid var(--line-light);
}

.detail-title {
    color: #9f9b92;
    font-size: 0.63rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.detail-content {
    margin: 11px 0 9px;
    color: var(--paper-bright);
    font-family: "Noto Sans JP", sans-serif;
    font-size: 2.1rem;
    line-height: 1;
}

.detail-meaning {
    margin: 3px 0;
    color: #aaa69d;
    font-size: 0.8rem;
}

.detail-meaning:first-of-type {
    color: var(--paper);
}

.examples-section {
    padding: 98px 0 112px;
    border-top: 1px solid var(--line);
}

.guide-section {
    padding: 100px 0 116px;
    border-top: 1px solid var(--line);
}

.use-steps {
    display: grid;
    gap: 0;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: 0;
    padding: 0;
    border-top: 1px solid var(--ink);
    border-left: 1px solid var(--line);
    list-style: none;
}

.use-steps li {
    min-height: 260px;
    padding: 25px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.use-steps li > span {
    display: block;
    margin-bottom: 44px;
    color: var(--vermilion-dark);
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.12em;
}

.use-steps h3 {
    margin: 0 0 14px;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.3rem;
    line-height: 1.2;
}

.use-steps p {
    margin: 0;
    color: var(--muted);
    font-size: 0.84rem;
}

.learning-block {
    display: grid;
    gap: 40px 72px;
    grid-template-columns: minmax(240px, 0.75fr) minmax(0, 1.25fr);
    margin-top: 88px;
    padding-top: 40px;
    border-top: 1px solid var(--ink);
}

.learning-heading h2 {
    margin: 15px 0 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2rem, 4vw, 3.25rem);
    font-weight: 500;
    letter-spacing: -0.04em;
    line-height: 1.05;
}

.article-links {
    border-top: 1px solid var(--line);
}

.article-links a {
    display: grid;
    min-height: 94px;
    align-items: center;
    gap: 10px 22px;
    grid-template-columns: 140px 1fr;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
    text-decoration: none;
}

.article-links a > span {
    color: var(--muted);
    font-size: 0.66rem;
    font-weight: 750;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.article-links strong {
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.08rem;
    line-height: 1.3;
    transition: color 180ms ease;
}

.article-links a:hover strong {
    color: var(--vermilion-dark);
}

.all-articles-link {
    grid-column: 2;
    justify-self: start;
    color: var(--vermilion-dark);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-decoration: none;
    text-transform: uppercase;
}

.all-articles-link span {
    display: inline-block;
    margin-left: 8px;
    transition: transform 180ms ease;
}

.all-articles-link:hover span {
    transform: translateX(4px);
}

.section-heading-compact {
    margin-bottom: 48px;
}

.example-grid {
    display: grid;
    gap: 0 48px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.example-item {
    display: grid;
    min-height: 90px;
    align-items: center;
    gap: 12px;
    grid-template-columns: minmax(70px, 0.8fr) auto minmax(82px, 1fr) auto;
    border-top: 1px solid var(--line);
}

.example-item:nth-last-child(-n + 2) {
    border-bottom: 1px solid var(--line);
}

.example-name {
    font-weight: 750;
}

.example-arrow {
    color: var(--muted);
}

.example-pronunciation {
    color: var(--muted);
    font-family: Georgia, "Times New Roman", serif;
    font-style: italic;
}

.example-kanji {
    color: var(--vermilion-dark);
    font-family: "Noto Sans JP", sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
}

.info-section {
    display: grid;
    gap: clamp(48px, 8vw, 104px);
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    margin-inline: calc(50% - 50vw);
    padding: 96px max(24px, calc((100vw - var(--content-width)) / 2));
    background: var(--paper-deep);
}

.info-intro h2 {
    margin-top: 18px;
}

.info-intro > p:not(.step-label) {
    margin: 28px 0 0;
    color: var(--ink-soft);
}

.disclaimer {
    margin-top: 34px;
    padding: 22px 0 0 24px;
    border-top: 1px solid var(--ink);
    border-left: 5px solid var(--vermilion);
}

.disclaimer p {
    margin: 0;
    font-size: 0.9rem;
}

.info-content {
    border-top: 1px solid var(--ink);
}

.info-content details {
    border-bottom: 1px solid var(--line);
}

.info-content summary {
    display: flex;
    min-height: 75px;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    cursor: pointer;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.13rem;
    font-weight: 700;
    list-style: none;
}

.info-content summary::-webkit-details-marker {
    display: none;
}

.info-content summary::after {
    color: var(--vermilion-dark);
    content: "+";
    font-family: ui-sans-serif, sans-serif;
    font-size: 1.45rem;
    font-weight: 400;
}

.info-content details[open] summary::after {
    content: "−";
}

.info-content details p {
    margin: -4px 0 25px;
    padding-right: 44px;
    color: var(--ink-soft);
    font-size: 0.9rem;
}

.info-content a {
    color: var(--vermilion-dark);
    font-weight: 750;
}

.footer {
    display: grid;
    gap: 28px;
    padding: 62px 0 42px;
    color: var(--muted);
    font-size: 0.76rem;
}

.footer-column-link {
    display: flex;
    min-height: 88px;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    border: 1px solid var(--ink);
    color: var(--ink);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.1rem, 2.5vw, 1.55rem);
    font-weight: 700;
    text-decoration: none;
    transition: background-color 180ms ease, color 180ms ease;
}

.footer-column-link span {
    font-family: ui-sans-serif, sans-serif;
    font-size: 1.6rem;
    font-weight: 400;
    transition: transform 180ms ease;
}

.footer-column-link:hover {
    background: var(--ink);
    color: var(--paper);
}

.footer-column-link:hover span {
    transform: translateX(5px);
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 24px;
}

.footer-nav a,
.footer p a {
    color: var(--ink);
}

.footer p {
    margin: 0;
}

.help-modal {
    position: fixed;
    z-index: 1000;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    overflow-y: auto;
    background: rgba(29, 29, 25, 0.76);
}

.help-modal.show {
    display: flex;
}

.help-content {
    position: relative;
    width: min(100%, 850px);
    max-height: min(88vh, 900px);
    padding: clamp(30px, 5vw, 58px);
    overflow-y: auto;
    background: var(--paper-bright);
    box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.24);
}

.help-heading {
    padding-bottom: 28px;
    border-bottom: 1px solid var(--line);
}

.help-content h2 {
    margin: 10px 0 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2rem, 5vw, 3.4rem);
    font-weight: 500;
    letter-spacing: -0.04em;
}

.help-content h3 {
    margin: 30px 0 10px;
    color: var(--vermilion-dark);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.help-content p,
.help-content li {
    color: var(--ink-soft);
    font-size: 0.9rem;
}

.help-content ul {
    margin: 10px 0 0;
    padding-left: 1.2em;
}

.help-content li + li {
    margin-top: 7px;
}

.help-content strong {
    color: var(--ink);
}

.close-button {
    position: absolute;
    top: 24px;
    right: 24px;
    display: grid;
    width: 42px;
    height: 42px;
    padding: 0;
    place-items: center;
    border: 1px solid var(--ink);
    border-radius: 0;
    background: transparent;
    color: var(--ink);
    cursor: pointer;
    font-size: 1.6rem;
    font-weight: 300;
    line-height: 1;
}

.close-button:hover {
    background: var(--ink);
    color: var(--paper);
}

.sound-grid {
    display: grid;
    gap: 6px;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    margin-top: 14px;
}

.sound-grid div {
    padding: 9px 12px;
    border: 1px solid var(--line);
    color: var(--muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.8rem;
    text-align: center;
}

.help-tip {
    padding: 14px 16px;
    border-left: 3px solid var(--vermilion);
    background: var(--paper);
}

@media (max-width: 820px) {
    .page-shell {
        width: min(calc(100% - 36px), var(--content-width));
    }

    .hero {
        min-height: 0;
        gap: 64px;
        grid-template-columns: 1fr;
        padding: 66px 0 88px;
    }

    .hero-mark {
        width: min(72vw, 320px);
        justify-self: start;
    }

    .section-heading {
        grid-template-columns: 110px 1fr;
    }

    .input-meta {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }

    .result-hero {
        grid-template-columns: 1fr;
    }

    .kanji-display {
        border-right: 0;
        border-bottom: 1px solid var(--line-light);
    }

    .result-reading {
        padding-left: 0;
    }

    .example-grid,
    .info-section,
    .learning-block {
        grid-template-columns: 1fr;
    }

    .all-articles-link {
        grid-column: 1;
    }

    .example-item:nth-last-child(2) {
        border-bottom: 0;
    }
}

@media (max-width: 600px) {
    .page-shell {
        width: min(calc(100% - 28px), var(--content-width));
    }

    .site-header {
        min-height: 82px;
    }

    .wordmark-text small {
        display: none;
    }

    .help-button {
        font-size: 0.66rem;
    }

    .hero {
        padding-top: 54px;
    }

    .hero h1 {
        font-size: clamp(3.35rem, 16vw, 4.8rem);
    }

    .hero-mark {
        width: 100%;
        max-width: none;
        aspect-ratio: 2.3 / 1;
        box-shadow: 11px 11px 0 var(--paper-deep);
    }

    .hero-kanji {
        top: -48px;
        font-size: 9rem;
    }

    .hero-kanji-secondary {
        top: auto;
        right: 10px;
        bottom: -48px;
    }

    .converter-section,
    .examples-section,
    .guide-section {
        padding: 78px 0 86px;
    }

    .section-heading {
        display: block;
    }

    .section-heading .step-label {
        margin-bottom: 13px;
    }

    .input-section {
        padding: 22px;
    }

    .input-group {
        grid-template-columns: 1fr;
    }

    input[type="text"] {
        border-right: 1px solid var(--ink);
        font-size: 1.08rem;
    }

    .convert-button {
        min-height: 58px;
    }

    .result-topline {
        align-items: stretch;
        flex-direction: column;
    }

    .result-actions {
        justify-content: flex-start;
    }

    .kanji-display {
        padding-right: 0;
    }

    .kanji-display-short {
        font-size: clamp(4.5rem, 21vw, 6.5rem);
    }

    .kanji-display-medium {
        font-size: clamp(3.6rem, 16vw, 5rem);
    }

    .kanji-display-long,
    .kanji-display-extra-long {
        font-size: clamp(2.7rem, 11vw, 3.75rem);
    }

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

    .detail-card {
        min-height: 160px;
        padding: 16px;
    }

    .example-item {
        gap: 8px;
        grid-template-columns: minmax(62px, 0.75fr) auto minmax(74px, 1fr) auto;
        font-size: 0.88rem;
    }

    .example-kanji {
        font-size: 1.1rem;
    }

    .use-steps {
        grid-template-columns: 1fr;
    }

    .use-steps li {
        min-height: 0;
    }

    .use-steps li > span {
        margin-bottom: 25px;
    }

    .learning-block {
        margin-top: 66px;
    }

    .article-links a {
        align-items: start;
        gap: 7px;
        grid-template-columns: 1fr;
        padding-block: 18px;
    }

    .info-section {
        gap: 56px;
        margin-inline: calc(50% - 50vw);
        padding-block: 78px;
    }

    .footer-column-link {
        min-height: 76px;
        padding-inline: 17px;
    }

    .help-modal {
        align-items: flex-start;
        padding: 12px;
    }

    .help-content {
        max-height: none;
        padding-top: 74px;
    }

    .close-button {
        top: 18px;
        right: 18px;
    }
}

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

    *,
    *::before,
    *::after {
        animation-delay: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-delay: 0ms !important;
        transition-duration: 0.01ms !important;
    }
}