:root {
    --carbon: #171816;
    --ink: #242522;
    --chalk: #f2efe7;
    --paper: #faf9f5;
    --blue: #3657ff;
    --coral: #ff5b3d;
    --steel: #aab0b2;
    --line: rgba(36,37,34,.18);
    --display: 'Archivo Black', 'Noto Sans KR', sans-serif;
    --body: 'Noto Sans KR', sans-serif;
    --mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 74px; }
body { color: var(--ink); background: var(--paper); font-family: var(--body); line-height: 1.6; overflow-x: hidden; }
body, button, input, select { font: inherit; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button { border: 0; }
:focus-visible { outline: 3px solid var(--coral); outline-offset: 4px; }
.skip-link { position: fixed; z-index: 9999; top: 10px; left: 10px; padding: 10px 15px; color: white; background: var(--blue); transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.section-pad { padding: 130px max(6vw, 28px); }
.section-index { color: var(--blue); font: 600 11px/1 var(--mono); letter-spacing: .08em; }
.section-index.light { color: rgba(255,255,255,.55); }

.site-header { position: fixed; z-index: 1000; top: 0; left: 0; right: 0; height: 76px; padding: 0 34px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; color: white; border-bottom: 1px solid rgba(255,255,255,.2); transition: background .25s, height .25s, color .25s; }
.site-header.is-scrolled { height: 66px; color: var(--ink); background: rgba(250,249,245,.94); border-color: var(--line); backdrop-filter: blur(14px); }
.wordmark { display: inline-flex; align-items: center; gap: 10px; justify-self: start; font: 600 12px/1.1 var(--mono); letter-spacing: .08em; }
.wordmark-box { width: 37px; height: 37px; display: grid; place-items: center; color: white; background: var(--blue); font-family: var(--display); letter-spacing: -.08em; }
.wordmark small { display: block; margin-top: 4px; opacity: .55; font-size: 7px; }
.site-header nav { display: flex; gap: 32px; font-size: 12px; font-weight: 600; }
.site-header nav a { position: relative; }
.site-header nav a::after { content: ''; position: absolute; left: 0; right: 100%; bottom: -6px; height: 2px; background: var(--coral); transition: right .2s; }
.site-header nav a:hover::after { right: 0; }
.header-cta { justify-self: end; display: flex; gap: 28px; align-items: center; font-size: 12px; font-weight: 700; }
.header-cta span { display: grid; place-items: center; width: 32px; height: 32px; color: white; background: var(--coral); border-radius: 50%; }

.hero { position: relative; min-height: 900px; height: 100svh; color: white; background: var(--carbon); overflow: hidden; }
.hero-media, .hero-shade { position: absolute; inset: 0; }
.hero-media img { height: 100%; object-fit: cover; object-position: center; animation: hero-scale 1.7s cubic-bezier(.22,1,.36,1) both; }
.hero-shade { background: linear-gradient(90deg, rgba(23,24,22,.94) 0%, rgba(23,24,22,.6) 38%, rgba(23,24,22,.02) 72%), linear-gradient(0deg, rgba(23,24,22,.75), transparent 48%); }
.hero-topline { position: absolute; z-index: 2; top: 110px; left: 34px; right: 34px; display: flex; justify-content: space-between; color: rgba(255,255,255,.65); font: 500 9px/1 var(--mono); letter-spacing: .1em; }
.hero-copy { position: absolute; z-index: 2; left: max(6vw, 34px); right: max(6vw, 34px); bottom: 76px; }
.kicker { margin-bottom: 22px; color: var(--coral); font: 600 11px/1 var(--mono); letter-spacing: .12em; }
.hero h1 { font: 400 clamp(72px, 11.3vw, 176px)/.78 var(--display); letter-spacing: -.075em; text-transform: uppercase; }
.hero h1 span, .hero h1 strong { display: block; }
.hero h1 strong { color: var(--chalk); -webkit-text-stroke: 1px var(--chalk); }
.hero-bottom { max-width: 760px; display: flex; align-items: end; gap: 65px; margin-top: 44px; }
.hero-bottom > p { max-width: 490px; color: rgba(255,255,255,.7); font-size: 16px; }
.hero-bottom b { color: white; }
.round-link { flex: 0 0 118px; width: 118px; height: 118px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--ink); background: var(--coral); border-radius: 50%; font: 600 10px/1.3 var(--mono); transition: transform .25s, background .25s; }
.round-link b { margin-top: 10px; color: var(--ink); font-size: 18px; }
.round-link:hover { background: var(--chalk); transform: rotate(7deg) scale(1.05); }
.hero-day { position: absolute; z-index: 2; right: 34px; bottom: 38px; display: flex; align-items: baseline; color: white; font-family: var(--mono); }
.hero-day span { margin-right: 10px; color: var(--coral); font-size: 10px; }
.hero-day strong { font: 400 52px/1 var(--display); }
.hero-day small { margin-left: 7px; opacity: .55; }
@keyframes hero-scale { from { transform: scale(1.08); filter: brightness(.7); } to { transform: scale(1); filter: brightness(1); } }

.marquee { overflow: hidden; color: white; background: var(--blue); transform: rotate(-1deg) scale(1.01); transform-origin: center; }
.marquee div { width: max-content; display: flex; align-items: center; gap: 35px; padding: 15px 0; animation: marquee 28s linear infinite; font: 400 20px/1 var(--display); }
.marquee i { color: var(--coral); font-style: normal; font-size: 10px; }
@keyframes marquee { to { transform: translateX(-50%); } }

.intro { background: var(--chalk); }
.intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 9vw; align-items: end; margin-top: 50px; }
.intro h2, .space h2, .trial h2, .faq h2 { font: 400 clamp(48px, 6.5vw, 104px)/.98 var(--display); letter-spacing: -.06em; word-break: keep-all; }
.intro h2 em { color: var(--blue); font-style: normal; }
.intro-copy { max-width: 520px; }
.intro-copy .lead { margin-bottom: 24px; color: var(--ink); font-size: 20px; font-weight: 700; }
.intro-copy > p:last-child { color: #686961; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 90px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principles article { min-height: 230px; padding: 30px 28px; border-right: 1px solid var(--line); }
.principles article:last-child { border-right: 0; }
.principles span { color: var(--coral); font: 600 10px/1 var(--mono); }
.principles h3 { margin-top: 62px; font-size: 22px; }
.principles p { margin-top: 10px; color: #73756e; font-size: 13px; }

.seven-days { color: white; background: var(--carbon); }
.days-head { display: flex; justify-content: space-between; align-items: end; gap: 40px; }
.days-head h2, .approach h2, .notes h2 { margin-top: 26px; font: 400 clamp(52px, 7vw, 112px)/.86 var(--display); letter-spacing: -.065em; }
.days-head > p { max-width: 370px; padding-bottom: 5px; color: rgba(255,255,255,.58); }
.day-console { margin-top: 90px; border: 1px solid rgba(255,255,255,.18); }
.day-rail { display: grid; grid-template-columns: repeat(7, 1fr); border-bottom: 1px solid rgba(255,255,255,.18); }
.day-rail button { min-height: 112px; display: flex; flex-direction: column; justify-content: space-between; padding: 18px; color: white; background: transparent; border-right: 1px solid rgba(255,255,255,.18); cursor: pointer; transition: color .2s, background .2s; }
.day-rail button:last-child { border-right: 0; }
.day-rail span { opacity: .45; font: 500 9px/1 var(--mono); }
.day-rail b { align-self: flex-end; font: 400 26px/1 var(--display); }
.day-rail button[aria-selected="true"] { color: var(--ink); background: var(--coral); }
.day-rail button[aria-selected="true"] span { opacity: .75; }
.day-panel { min-height: 390px; display: grid; grid-template-columns: .7fr 1.5fr .6fr; align-items: end; gap: 50px; padding: 55px; }
.day-number span, .day-duration span { display: block; color: rgba(255,255,255,.45); font: 500 9px/1 var(--mono); letter-spacing: .1em; }
.day-number strong { display: block; margin-top: 15px; color: var(--blue); font: 400 clamp(90px, 12vw, 190px)/.75 var(--display); letter-spacing: -.08em; }
.day-copy > p:first-child { color: var(--coral); font: 600 10px/1 var(--mono); letter-spacing: .1em; }
.day-copy h3 { margin: 18px 0; font-size: clamp(27px, 3vw, 44px); line-height: 1.25; }
.day-copy > p:last-child { max-width: 510px; color: rgba(255,255,255,.6); }
.day-duration { text-align: right; }
.day-duration strong { display: block; margin-top: 12px; font: 500 18px/1 var(--mono); }

.approach { display: grid; grid-template-columns: 1.02fr .98fr; min-height: 900px; background: var(--paper); }
.approach-image { min-height: 900px; overflow: hidden; }
.approach-image img { height: 100%; object-fit: cover; }
.approach-copy { align-self: center; padding-left: 7vw; padding-right: 7vw; }
.approach h2 { margin-top: 34px; color: var(--blue); font-size: clamp(53px, 6vw, 95px); }
.approach-lead { max-width: 480px; margin-top: 35px; font-size: 19px; font-weight: 700; }
.approach ol { margin-top: 55px; list-style: none; border-top: 1px solid var(--line); }
.approach li { display: grid; grid-template-columns: 45px 1fr; gap: 18px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.approach li > span { color: var(--coral); font: 600 10px/2 var(--mono); }
.approach li h3 { font-size: 18px; }
.approach li p { margin-top: 5px; color: #777970; font-size: 13px; }

.space { background: var(--chalk); }
.space-title { display: grid; grid-template-columns: 1.1fr .9fr; gap: 9vw; align-items: end; margin-top: 45px; }
.space-title > p { max-width: 430px; color: #676961; }
.space-gallery { display: grid; grid-template-columns: 1.4fr .6fr; gap: 24px; align-items: start; margin-top: 85px; }
.space figure { position: relative; }
.space figure img { width: 100%; object-fit: cover; filter: saturate(.65) contrast(1.08); }
.space .facility img { height: 650px; }
.space .coach { margin-top: 160px; }
.space .coach img { height: 520px; }
.space figcaption { display: flex; flex-direction: column; margin-top: 17px; }
.space figcaption span { color: var(--blue); font: 600 9px/1 var(--mono); letter-spacing: .1em; }
.space figcaption b { margin-top: 12px; font-size: 20px; line-height: 1.35; }
.space figcaption small { margin-top: 7px; color: #777970; font-size: 10px; }

.notes { display: grid; grid-template-columns: .75fr 1.25fr; gap: 9vw; color: white; background: var(--blue); }
.notes-title { position: sticky; top: 110px; align-self: start; }
.notes h2 { margin-top: 28px; font-size: clamp(44px, 5vw, 78px); }
.notes-list blockquote { padding: 44px 0; border-top: 1px solid rgba(255,255,255,.3); }
.notes-list blockquote:last-child { border-bottom: 1px solid rgba(255,255,255,.3); }
.notes-list span { color: var(--coral); font: 600 9px/1 var(--mono); }
.notes-list p { margin: 30px 0; font-size: clamp(22px, 2.4vw, 35px); font-weight: 700; line-height: 1.45; word-break: keep-all; }
.notes-list footer { color: rgba(255,255,255,.55); font-size: 11px; }

.trial { color: white; background: var(--carbon); }
.pass-wrap { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid rgba(255,255,255,.22); }
.trial-copy { padding: 65px; background: linear-gradient(145deg, rgba(54,87,255,.28), transparent 60%); }
.trial h2 { margin-top: 32px; font-size: clamp(60px, 7vw, 105px); }
.trial-copy > p:not(.section-index) { max-width: 440px; margin-top: 30px; color: rgba(255,255,255,.62); }
.trial dl { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; margin-top: 55px; }
.trial dl div { padding-top: 15px; border-top: 1px solid rgba(255,255,255,.2); }
.trial dt { color: var(--coral); font: 600 9px/1 var(--mono); }
.trial dd { margin-top: 8px; font-size: 12px; }
.trial-form { position: relative; padding: 65px; color: var(--ink); background: var(--chalk); }
.trial-form::before, .trial-form::after { content: ''; position: absolute; left: -15px; width: 30px; height: 30px; background: var(--carbon); border-radius: 50%; }
.trial-form::before { top: -15px; }
.trial-form::after { bottom: -15px; }
.form-top { display: flex; justify-content: space-between; margin-bottom: 42px; color: var(--blue); font: 600 10px/1 var(--mono); }
.trial-form > label:not(.agree) { display: block; margin-bottom: 22px; }
.trial-form label > span { display: block; margin-bottom: 8px; font-size: 11px; font-weight: 700; }
.trial-form input, .trial-form select { width: 100%; height: 52px; padding: 0 14px; color: var(--ink); background: transparent; border: 1px solid var(--line); border-radius: 0; }
.trial-form input[aria-invalid="true"] { border-color: #c83b25; }
.field-error { display: block; min-height: 15px; margin-top: 4px; color: #c83b25; font-size: 10px; }
.trial-form .agree { display: flex; align-items: center; gap: 10px; margin: 5px 0 25px; color: #73756e; cursor: pointer; }
.trial-form .agree input { width: 16px; height: 16px; accent-color: var(--blue); }
.trial-form .agree span { margin: 0; font-size: 10px; font-weight: 500; }
.trial-form button { width: 100%; min-height: 58px; padding: 0 22px; display: flex; justify-content: space-between; align-items: center; color: white; background: var(--blue); font-weight: 700; cursor: pointer; transition: background .2s; }
.trial-form button:hover { background: var(--coral); }
.form-status { min-height: 18px; margin-top: 10px; color: var(--blue); font-size: 10px; text-align: center; }

.faq { display: grid; grid-template-columns: .7fr 1.3fr; gap: 10vw; background: var(--paper); }
.faq-heading { position: sticky; top: 110px; align-self: start; }
.faq h2 { margin-top: 30px; font-size: clamp(54px, 6vw, 92px); }
.faq-list article { border-top: 1px solid var(--line); }
.faq-list article:last-child { border-bottom: 1px solid var(--line); }
.faq-list button { width: 100%; padding: 27px 0; display: flex; justify-content: space-between; align-items: center; color: var(--ink); background: transparent; font-weight: 700; text-align: left; cursor: pointer; }
.faq-list button b { color: var(--blue); font: 400 22px/1 var(--mono); transition: transform .2s; }
.faq-list button[aria-expanded="true"] b { transform: rotate(45deg); }
.faq-answer p { max-width: 610px; padding: 0 40px 28px 0; color: #72746d; font-size: 13px; }

.site-footer { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr) auto; gap: 40px; align-items: end; padding: 65px 34px; color: rgba(255,255,255,.63); background: var(--carbon); }
.footer-mark { color: white; font: 400 45px/.8 var(--display); letter-spacing: -.06em; }
.site-footer span { color: var(--coral); font: 600 8px/1 var(--mono); }
.site-footer p { margin-top: 10px; font: 400 10px/1.65 var(--mono); }
.site-footer small { font: 400 8px/1 var(--mono); }
.mobile-pass { display: none; }

[data-reveal] { opacity: 0; transform: translateY(25px); transition: opacity .75s, transform .75s; }
[data-reveal].is-visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
    .site-header { grid-template-columns: 1fr 1fr; }
    .site-header nav { display: none; }
    .hero { min-height: 780px; }
    .hero-shade { background: linear-gradient(0deg, rgba(23,24,22,.92) 0%, rgba(23,24,22,.18) 75%); }
    .hero h1 { font-size: clamp(70px, 14vw, 120px); }
    .hero-bottom { gap: 30px; }
    .intro-grid, .space-title, .notes, .faq { grid-template-columns: 1fr; gap: 55px; }
    .principles { grid-template-columns: 1fr; }
    .principles article { min-height: 180px; border-right: 0; border-bottom: 1px solid var(--line); }
    .principles article:last-child { border-bottom: 0; }
    .principles h3 { margin-top: 35px; }
    .day-panel { grid-template-columns: .65fr 1.35fr; }
    .day-duration { display: none; }
    .approach { grid-template-columns: 1fr; }
    .approach-image { min-height: 700px; max-height: 850px; }
    .space-gallery { grid-template-columns: 1fr 1fr; }
    .notes-title, .faq-heading { position: static; }
    .pass-wrap { grid-template-columns: 1fr; }
    .trial-form::before, .trial-form::after { top: -15px; left: auto; }
    .trial-form::before { left: -15px; }
    .trial-form::after { right: -15px; }
    .site-footer { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
    body { padding-bottom: 64px; }
    .section-pad { padding: 88px 20px; }
    .site-header, .site-header.is-scrolled { height: 62px; padding: 0 16px; }
    .header-cta { display: none; }
    .wordmark-box { width: 33px; height: 33px; }
    .hero { min-height: 760px; height: 100svh; }
    .hero-media img { object-position: 64% center; }
    .hero-shade { background: linear-gradient(0deg, rgba(23,24,22,.96) 0%, rgba(23,24,22,.5) 57%, rgba(23,24,22,.08) 100%); }
    .hero-topline { top: 86px; left: 16px; right: 16px; }
    .hero-topline span:last-child { display: none; }
    .hero-copy { left: 16px; right: 16px; bottom: 94px; }
    .kicker { margin-bottom: 15px; }
    .hero h1 { font-size: clamp(58px, 19vw, 78px); line-height: .84; }
    .hero-bottom { display: block; margin-top: 28px; }
    .hero-bottom > p { font-size: 13px; }
    .round-link { position: absolute; right: 0; bottom: -6px; width: 86px; height: 86px; font-size: 8px; }
    .hero-day { right: auto; left: 16px; bottom: 25px; }
    .hero-day strong { font-size: 34px; }
    .marquee div { gap: 24px; padding: 12px 0; font-size: 16px; }
    .intro-grid { margin-top: 35px; }
    .intro h2, .space h2, .trial h2, .faq h2 { font-size: 47px; }
    .intro-copy .lead { font-size: 17px; }
    .principles { margin-top: 55px; }
    .days-head { display: block; }
    .days-head h2, .approach h2, .notes h2 { font-size: 52px; }
    .days-head > p { margin-top: 25px; font-size: 13px; }
    .day-console { margin-top: 55px; border-left: 0; border-right: 0; }
    .day-rail { overflow-x: auto; grid-template-columns: repeat(7, minmax(72px, 1fr)); }
    .day-rail button { min-height: 82px; padding: 12px; }
    .day-rail b { font-size: 19px; }
    .day-panel { min-height: 370px; grid-template-columns: 1fr; align-content: end; padding: 28px 18px; }
    .day-number strong { font-size: 100px; }
    .day-copy h3 { font-size: 25px; }
    .day-copy > p:last-child { font-size: 13px; }
    .approach-image { min-height: 620px; }
    .approach-copy { padding-left: 20px; padding-right: 20px; }
    .space-gallery { grid-template-columns: 1fr; gap: 50px; margin-top: 55px; }
    .space .facility img, .space .coach img { height: auto; aspect-ratio: 1 / 1.05; }
    .space .coach { width: 78%; margin: 0 0 0 auto; }
    .notes-list p { font-size: 21px; }
    .trial-copy, .trial-form { padding: 38px 22px; }
    .trial dl { grid-template-columns: 1fr; }
    .faq { gap: 40px; }
    .site-footer { grid-template-columns: 1fr 1fr; padding: 48px 20px; }
    .footer-mark { grid-column: 1 / -1; }
    .mobile-pass { position: fixed; z-index: 1200; left: 0; right: 0; bottom: 0; height: 64px; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; color: white; background: var(--blue); }
    .mobile-pass span { font: 600 9px/1 var(--mono); }
    .mobile-pass b { font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
    [data-reveal] { opacity: 1; transform: none; }
}