:root {
    --paper: #ffffff;
    --ink: #11100f;
    --muted: #686866;
    --soft: #f4f4f2;
    --line: #d9d9d5;
    --cobalt: #2b52c2;
    --vermilion: #f13a2d;
    --green: #15966f;
    --focus: #2b52c2;
    --paper-translucent: rgba(255, 255, 255, .96);
    --header-rule: rgba(17, 16, 15, .12);
    --cobalt-soft: rgba(43, 82, 194, .12);
    --vermilion-soft: rgba(241, 58, 45, .1);
    --chart-default: rgba(104, 104, 102, .2);
    --chart-default-line: rgba(104, 104, 102, .72);
    --font-editorial: "Iowan Old Style", "AppleMyungjo", "Batang", Georgia, serif;
    --font-utility: Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
    --type-display: clamp(2.65rem, 4.25vw, 4.5rem);
    --type-h2: clamp(2rem, 3.4vw, 3.5rem);
    --type-h3: clamp(1.35rem, 2vw, 2rem);
    --type-lead: clamp(1rem, 1.4vw, 1.1875rem);
    --type-body: 1rem;
    --type-utility: .9375rem;
    --type-label: .75rem;
    --type-small: .875rem;
    --type-tiny: .8125rem;
    --type-icon: 1.35rem;
    --type-feature: clamp(1.7rem, 2.5vw, 2.35rem);
    --type-radar: 1.125rem;
    --type-display-mobile: 2.45rem;
    --tracking-display: -.035em;
    --tracking-heading: -.025em;
    --tracking-subheading: -.018em;
    --tracking-label: .04em;
    --tracking-wordmark: .045em;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    --space-32: 128px;
    --space-40: 160px;
    --reading: 1000px;
    --prose: 640px;
    --nav-height: 54px;
    --touch-target: 44px;
    --radius-pill: 999px;
    --hero-min: 940px;
    --hero-min-mobile: 760px;
    --hero-art: 520px;
    --radar-max: 820px;
    --feature-min: 300px;
    --feature-min-mobile: 240px;
    --portrait-max: 420px;
    --mentor-copy-max: 580px;
    --disclosure-min: 64px;
    --line-width: 1px;
    --focus-width: 2px;
    --icon-stroke: 1.5;
    --motion-fast: 160ms ease-out;
    --motion-standard: 280ms cubic-bezier(.22, 1, .36, 1);
    --motion-organic: 720ms cubic-bezier(.22, 1, .36, 1);
    --motion-reveal: 700ms cubic-bezier(.16, 1, .3, 1);
    --motion-scroll: 500ms cubic-bezier(.16, 1, .3, 1);
}

* { box-sizing: border-box; }

html {
    color: var(--ink);
    background: var(--paper);
    scroll-behavior: smooth;
}

body {
    min-width: 320px;
    margin: 0;
    overflow-x: hidden;
    color: var(--ink);
    background: var(--paper);
    font-family: var(--font-utility);
    font-size: var(--type-body);
    line-height: 1.7;
    overflow-wrap: break-word;
    word-break: keep-all;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button, input { color: inherit; font: inherit; }
img, svg { display: block; max-width: 100%; }

:focus-visible {
    outline: var(--focus-width) solid var(--focus);
    outline-offset: var(--space-1);
}

[hidden] { display: none !important; }

section[id] { scroll-margin-top: calc(var(--nav-height) + var(--space-8)); }

.reading-frame {
    width: min(calc(100% - var(--space-16)), var(--reading));
    margin-inline: auto;
}

.ink-nav {
    position: fixed;
    z-index: 20;
    inset: 0 var(--space-4) auto;
    display: flex;
    height: var(--nav-height);
    align-items: center;
    justify-content: space-between;
    background: var(--paper-translucent);
    border-bottom: var(--line-width) solid transparent;
    transition: border-color var(--motion-fast);
}

.ink-nav.scrolled { border-color: var(--header-rule); }

.site-wordmark {
    display: inline-flex;
    min-height: var(--touch-target);
    align-items: center;
    font-size: var(--type-utility);
    font-weight: 600;
    letter-spacing: var(--tracking-wordmark);
    white-space: nowrap;
}

.ink-nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    font-size: var(--type-utility);
    line-height: 1;
}

.ink-nav-links a {
    display: inline-flex;
    min-width: var(--touch-target);
    min-height: var(--touch-target);
    align-items: center;
    justify-content: center;
    color: var(--muted);
    transition: color var(--motion-fast);
}

.ink-nav-links a:hover,
.ink-nav-links a[aria-current="page"] { color: var(--ink); }

.ink-nav-links a[aria-current="page"]::after {
    width: var(--space-1);
    height: var(--space-1);
    margin-left: var(--space-2);
    border-radius: 50%;
    background: var(--cobalt);
    content: "";
}

.ink-nav-toggle {
    display: none;
    width: var(--touch-target);
    height: var(--touch-target);
    border: 0;
    padding: var(--space-3);
    background: transparent;
    cursor: pointer;
}

.ink-nav-toggle span {
    display: block;
    width: 100%;
    height: var(--line-width);
    margin: var(--space-2) 0;
    background: var(--ink);
    transition: transform var(--motion-standard);
}

.ink-hero {
    display: grid;
    min-height: max(var(--hero-min), 100svh);
    place-items: center;
    padding: calc(var(--nav-height) + var(--space-40) + var(--space-12)) var(--space-8) var(--space-20);
    text-align: center;
}

.ink-organism {
    width: min(var(--hero-art), 78vw);
    margin: 0 auto calc(var(--space-12) * -1);
    touch-action: pan-y;
    animation: organism-arrive var(--motion-reveal) both;
}

.ink-organism svg { overflow: visible; }
.ink-shape { shape-rendering: geometricPrecision; }

.ink-body,
.ink-dot { transform-origin: center; }

.ink-body { fill: var(--ink); }
.ink-dot-green { fill: var(--green); }
.ink-dot-blue { fill: var(--cobalt); }
.ink-dot-red { fill: var(--vermilion); }

.hero-copy {
    translate: 0 var(--space-8);
}

.hero-copy > * { animation: copy-arrive var(--motion-reveal) both; }
.hero-copy > :nth-child(1) { animation-delay: 100ms; }
.hero-copy > :nth-child(2) { animation-delay: 180ms; }
.hero-copy > :nth-child(3) { animation-delay: 260ms; }
.hero-copy > :nth-child(4) { animation-delay: 340ms; }

.reveal-ready .ink-section > .reading-frame {
    opacity: 0;
    transform: translateY(var(--space-8));
    transition: opacity var(--motion-scroll), transform var(--motion-scroll);
}

.reveal-ready .ink-section.is-visible > .reading-frame {
    opacity: 1;
    transform: translateY(0);
}

.hero-label,
.section-label {
    margin: 0 0 var(--space-4);
    font-size: var(--type-label);
    font-weight: 700;
    letter-spacing: var(--tracking-label);
    text-align: center;
}

.ink-hero h1,
.center-title,
.mentor-copy h2,
.curriculum-list h3,
.method-grid h3,
.outcome-grid h3 {
    font-family: var(--font-editorial);
    font-weight: 400;
}

.ink-hero h1 {
    margin: 0;
    font-size: var(--type-display);
    line-height: 1.08;
    letter-spacing: var(--tracking-display);
}

.ink-hero h1 span { display: block; }

.hero-lead {
    max-width: var(--prose);
    margin: var(--space-6) auto 0;
    color: var(--muted);
    font-size: var(--type-lead);
    line-height: 1.65;
}

.action-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--space-4) var(--space-8);
    margin-top: var(--space-8);
}

.soft-action,
.text-action {
    display: inline-flex;
    min-height: var(--touch-target);
    align-items: center;
    justify-content: center;
    font-size: var(--type-utility);
}

.soft-action {
    border-radius: var(--radius-pill);
    padding: 0 var(--space-6);
    background: var(--soft);
    transition: background-color var(--motion-fast), color var(--motion-fast), transform var(--motion-fast);
}

.soft-action:hover { background: var(--line); }
.soft-action:active { transform: scale(.98); }
.soft-action-dark { color: var(--paper); background: var(--ink); }
.soft-action-dark:hover { color: var(--paper); background: var(--cobalt); }

.text-action { gap: var(--space-2); }
.text-action span { transition: transform var(--motion-fast); }
.text-action:hover span { transform: translateX(var(--space-1)); }

.ink-section { padding: var(--space-32) 0; }

.center-title {
    margin: 0 0 var(--space-16);
    font-size: var(--type-h2);
    line-height: 1.15;
    letter-spacing: var(--tracking-heading);
    text-align: center;
}

.metric-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
}

.metric-row > div {
    display: grid;
    gap: var(--space-1);
}

.metric-icon {
    width: var(--space-6);
    height: var(--space-6);
    margin-bottom: var(--space-2);
    fill: none;
    stroke: var(--muted);
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: var(--icon-stroke);
}

.metric-row strong { font-weight: 500; }
.metric-row small { color: var(--muted); font-size: var(--type-utility); }

.overview-note,
.section-intro,
.location-note {
    max-width: var(--prose);
    margin: var(--space-16) auto 0;
    color: var(--muted);
    text-align: center;
}

.overview-note span { display: block; }

.method-section { padding-top: var(--space-40); }

.taste-radar {
    width: min(100%, var(--radar-max));
    margin: 0 auto var(--space-16);
}

.taste-radar svg { overflow: visible; }

.radar-grid polygon,
.radar-grid path {
    fill: none;
    stroke: var(--line);
    stroke-width: var(--line-width);
}

.radar-series {
    transform-origin: center;
    transition: opacity var(--motion-standard), transform var(--motion-standard);
}

.radar-series-camp {
    fill: var(--cobalt-soft);
    stroke: var(--cobalt);
    stroke-width: var(--focus-width);
}

.radar-series-default {
    fill: var(--chart-default);
    stroke: var(--chart-default-line);
    stroke-dasharray: var(--space-2) var(--space-1);
    stroke-width: var(--focus-width);
}

.radar-series.is-muted { opacity: .08; transform: scale(.98); }
.radar-points circle { fill: var(--paper); stroke: var(--cobalt); stroke-width: var(--focus-width); }

.radar-labels {
    fill: var(--ink);
    font-family: var(--font-utility);
    font-size: var(--space-4);
    font-weight: 500;
}

.radar-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-3);
}

.radar-legend button {
    display: inline-flex;
    min-height: var(--touch-target);
    align-items: center;
    gap: var(--space-2);
    border: 0;
    border-radius: var(--radius-pill);
    padding: 0 var(--space-4);
    background: transparent;
    cursor: pointer;
    transition: background-color var(--motion-fast), color var(--motion-fast);
}

.radar-legend button:hover,
.radar-legend button[aria-pressed="true"] { background: var(--soft); }
.radar-legend button[aria-pressed="false"] { color: var(--muted); }

.legend-dot {
    width: var(--space-2);
    height: var(--space-2);
    border-radius: 50%;
}

.camp-dot { background: var(--cobalt); }
.default-dot { border: var(--line-width) solid var(--muted); background: var(--paper); }

.method-grid,
.outcome-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-12) var(--space-8);
}

.method-grid article,
.outcome-grid article {
    border-top: var(--line-width) solid var(--line);
    padding-top: var(--space-5);
}

.method-grid article > span {
    color: var(--muted);
    font-size: var(--type-label);
    letter-spacing: var(--tracking-label);
}

.method-grid h3,
.outcome-grid h3 {
    margin: var(--space-4) 0 var(--space-2);
    font-size: var(--type-h3);
    line-height: 1.25;
    letter-spacing: var(--tracking-subheading);
}

.method-grid p,
.outcome-grid p { margin: 0; color: var(--muted); }

.curriculum-section { padding-top: var(--space-40); }
.section-intro { margin-bottom: var(--space-16); }

.curriculum-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    margin: 0;
    padding: 0;
    list-style: none;
}

.curriculum-list li {
    display: grid;
    grid-template-columns: var(--space-10) 1fr;
    gap: var(--space-4);
    border-top: var(--line-width) solid var(--line);
    padding: var(--space-6) 0;
}

.curriculum-list .lesson-featured {
    min-height: var(--feature-min);
    align-content: space-between;
    border: 0;
    border-radius: var(--space-3);
    padding: var(--space-8);
}

.lesson-blue { background: var(--cobalt-soft); }
.lesson-red { background: var(--vermilion-soft); }

.curriculum-list li:nth-child(n + 3) { grid-column: 1 / -1; }

.lesson-index { color: var(--muted); font-size: var(--type-label); }
.curriculum-list small { color: var(--muted); font-size: var(--type-label); letter-spacing: var(--tracking-label); }

.curriculum-list h3 {
    margin: var(--space-3) 0 0;
    font-size: var(--type-h3);
    line-height: 1.25;
    letter-spacing: var(--tracking-subheading);
}

.lesson-featured h3 { font-size: var(--type-feature); }
.lesson-featured h3 span { display: block; }

.content-note {
    margin: var(--space-6) 0 0;
    color: var(--muted);
    font-size: var(--type-label);
    text-align: right;
}

.outcome-section { padding-top: var(--space-40); }

.grid-art {
    position: relative;
    width: 240px;
    height: 160px;
    margin: var(--space-24) auto 0;
}

.grid-art > span {
    position: absolute;
    width: var(--space-3);
    height: var(--space-3);
    border-radius: 50%;
    background: var(--line);
}

.grid-art > span:nth-child(1) { left: 12px; top: 12px; }
.grid-art > span:nth-child(2) { left: 114px; top: 12px; }
.grid-art > span:nth-child(3) { right: 12px; top: 12px; }
.grid-art > span:nth-child(4) { left: 12px; top: 74px; }
.grid-art > span:nth-child(5) { left: 114px; top: 74px; }
.grid-art > span:nth-child(6) { right: 12px; top: 74px; }
.grid-art > span:nth-child(7) { left: 12px; bottom: 12px; }
.grid-art > span:nth-child(8) { left: 114px; bottom: 12px; }
.grid-art > span:nth-child(9) { right: 12px; bottom: 12px; }

.grid-art::before,
.grid-art::after {
    position: absolute;
    inset: var(--space-4) var(--space-4);
    background: linear-gradient(var(--line), var(--line)) 0 50% / 100% var(--line-width) no-repeat;
    content: "";
}

.grid-art::after { transform: rotate(90deg); }
.grid-art svg { position: relative; z-index: 1; width: 100%; height: 100%; }
.grid-art path { fill: var(--paper); stroke: var(--ink); stroke-width: var(--focus-width); }

.people-section { padding-top: var(--space-40); }

.people-grid {
    display: grid;
    grid-template-columns: minmax(280px, 420px) 1fr;
    align-items: center;
    gap: var(--space-20);
}

.mentor-portrait {
    margin: 0;
    border-radius: var(--space-3);
    overflow: hidden;
    background: var(--soft);
}

.mentor-portrait img { width: 100%; height: auto; filter: grayscale(1); }
.mentor-copy .section-label { text-align: left; }

.mentor-copy h2 {
    margin: 0 0 var(--space-2);
    font-size: var(--type-h2);
    line-height: 1.15;
    letter-spacing: var(--tracking-heading);
}

.mentor-role { margin: 0 0 var(--space-6); color: var(--muted); }
.mentor-copy > p:last-of-type { max-width: var(--mentor-copy-max); }

.mentor-facts { margin: var(--space-8) 0 0; }
.mentor-facts div { display: grid; grid-template-columns: 92px 1fr; gap: var(--space-4); border-top: var(--line-width) solid var(--line); padding: var(--space-4) 0; }
.mentor-facts dt { color: var(--muted); }
.mentor-facts dd { margin: 0; }

.apply-section { padding-top: var(--space-40); }

.schedule-row,
.price-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.schedule-row { margin-bottom: var(--space-4); }

.schedule-row > div {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    border-top: var(--line-width) solid var(--line);
    padding: var(--space-5) 0;
}

.schedule-row span,
.price-name { color: var(--muted); font-size: var(--type-utility); }
.schedule-row strong { font-weight: 500; }
.location-note { margin-top: var(--space-4); }

.price-grid { margin-top: var(--space-16); }

.price-grid article {
    border: var(--line-width) solid var(--line);
    border-radius: var(--space-3);
    padding: var(--space-8);
}

.price { display: flex; align-items: baseline; gap: var(--space-3); margin: var(--space-5) 0 var(--space-2); }
.price del { color: var(--muted); }
.price strong { font-family: var(--font-editorial); font-size: var(--type-h3); font-weight: 400; }
.price-note { color: var(--muted); font-size: var(--type-utility); }
.price-note b { color: var(--cobalt); }

.next-prices {
    margin-top: var(--space-4);
    border-top: var(--line-width) solid var(--line);
    border-bottom: var(--line-width) solid var(--line);
    padding: var(--space-3) 0;
    color: var(--muted);
    font-size: var(--type-utility);
}

.next-prices p { margin: var(--space-2) 0; }
.next-prices b { color: var(--ink); }
.apply-action { margin-top: var(--space-8); text-align: center; }

.faq { padding-top: var(--space-32); }

.faq-list { border-top: var(--line-width) solid var(--line); }
.faq-list details { border-bottom: var(--line-width) solid var(--line); }

.faq-list summary {
    position: relative;
    min-height: var(--disclosure-min);
    padding: var(--space-5) var(--space-10) var(--space-5) 0;
    cursor: pointer;
    font-weight: 500;
    list-style: none;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list summary::after {
    position: absolute;
    top: calc(50% - var(--space-2));
    right: var(--space-2);
    width: var(--space-4);
    height: var(--space-4);
    background: linear-gradient(var(--ink), var(--ink)) 50% 50% / 100% var(--line-width) no-repeat, linear-gradient(var(--ink), var(--ink)) 50% 50% / var(--line-width) 100% no-repeat;
    content: "";
    transition: transform var(--motion-fast);
}

.faq-list details[open] summary::after { transform: rotate(45deg); }
.faq-list details p { max-width: var(--prose); margin: 0; padding: 0 0 var(--space-6); color: var(--muted); }

.ink-footer {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-8);
    margin: var(--space-20) var(--space-4) 0;
    border-top: var(--line-width) solid var(--line);
    padding: var(--space-8) 0 var(--space-12);
    color: var(--muted);
    font-size: var(--type-utility);
}

.footer-wordmark { color: var(--ink); font-weight: 600; letter-spacing: var(--tracking-wordmark); }
.ink-footer nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: var(--space-6); }
.ink-footer nav a {
    display: inline-flex;
    min-width: var(--touch-target);
    min-height: var(--touch-target);
    align-items: center;
    justify-content: center;
}
.ink-footer a:hover { color: var(--ink); }
.footer-meta { grid-column: 1 / -1; display: flex; justify-content: space-between; padding-top: var(--space-8); font-size: var(--type-label); letter-spacing: var(--tracking-label); }

@keyframes organism-arrive {
    from { opacity: 0; transform: translateY(var(--space-8)) scale(.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes copy-arrive {
    from { opacity: 0; transform: translateY(var(--space-5)); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1100px) {
    .ink-nav-links { gap: var(--space-4); font-size: var(--type-small); }
}

@media (max-width: 900px) {
    .reading-frame { width: min(calc(100% - var(--space-10)), var(--reading)); }
    .ink-nav { inset-inline: var(--space-5); }
    .ink-nav-toggle { display: block; }
    .ink-nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4.5px) rotate(45deg); }
    .ink-nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4.5px) rotate(-45deg); }
    .ink-nav-links {
        position: absolute;
        top: var(--nav-height);
        right: calc(var(--space-5) * -1);
        left: calc(var(--space-5) * -1);
        display: grid;
        visibility: hidden;
        gap: 0;
        border-top: var(--line-width) solid var(--line);
        border-bottom: var(--line-width) solid var(--line);
        padding: var(--space-3) var(--space-5);
        opacity: 0;
        background: var(--paper);
        transform: translateY(calc(var(--space-3) * -1));
        transition: opacity var(--motion-standard), transform var(--motion-standard), visibility var(--motion-standard);
    }
    .ink-nav-links.open { visibility: visible; opacity: 1; transform: translateY(0); }
    .ink-nav-links a { border-bottom: var(--line-width) solid var(--line); }
    .ink-nav-links a:last-child { border-bottom: 0; }
    .people-grid { grid-template-columns: 1fr; gap: var(--space-12); }
    .mentor-portrait { width: min(100%, var(--portrait-max)); }
}

@media (max-width: 720px) {
    .ink-hero { min-height: var(--hero-min-mobile); padding: calc(var(--nav-height) + var(--space-6)) var(--space-5) var(--space-20); }
    .ink-organism { width: 100%; margin-bottom: calc(var(--space-6) * -1); }
    .hero-copy { translate: none; }
    .ink-section { padding: var(--space-20) 0; }
    .method-section,
    .curriculum-section,
    .outcome-section,
    .people-section,
    .apply-section { padding-top: var(--space-24); }
    .center-title { margin-bottom: var(--space-12); }
    .metric-row,
    .method-grid,
    .outcome-grid,
    .curriculum-list,
    .schedule-row,
    .price-grid { grid-template-columns: 1fr; gap: 0; }
    .metric-row > div { border-top: var(--line-width) solid var(--line); padding: var(--space-5) 0; }
    .overview-note { margin-top: var(--space-10); text-align: left; }
    .overview-note span { display: inline; }
    .taste-radar { width: 108%; margin-left: -4%; }
    .radar-labels { font-size: var(--type-radar); }
    .method-grid article,
    .outcome-grid article { padding: var(--space-5) 0; }
    .curriculum-list .lesson-featured { min-height: var(--feature-min-mobile); margin-bottom: var(--space-4); }
    .curriculum-list li:nth-child(n + 3) { grid-column: auto; }
    .section-intro { text-align: left; }
    .content-note { text-align: left; }
    .people-grid { gap: var(--space-10); }
    .mentor-copy .section-label { text-align: left; }
    .mentor-facts div { grid-template-columns: 80px 1fr; }
    .schedule-row > div { border-top: var(--line-width) solid var(--line); }
    .location-note { text-align: left; }
    .price-grid article { margin-bottom: var(--space-3); padding: var(--space-6); }
    .price { flex-wrap: wrap; }
    .faq { padding-top: var(--space-24); }
    .ink-footer { grid-template-columns: 1fr; margin-top: var(--space-12); }
    .ink-footer nav { justify-content: flex-start; gap: var(--space-4); }
    .footer-meta { display: grid; gap: var(--space-2); }
}

@media (max-width: 390px) {
    .ink-hero h1 { font-size: var(--type-display-mobile); }
    .action-row { gap: var(--space-2) var(--space-5); }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
    .ink-body,
    .ink-dot { transform: none !important; }
}