:root {
  --paper: #f3f1eb;
  --paper-deep: #e9e6dc;
  --ink: #17241f;
  --ink-soft: #405049;
  --line: rgba(23, 36, 31, 0.18);
  --accent: #d8ff55;
  --white: #fffef9;
  --max-width: 1280px;
  --side: clamp(20px, 5vw, 72px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Pretendard, "Apple SD Gothic Neo", "Noto Sans KR", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button, summary { cursor: pointer; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; z-index: 1000; top: 8px; left: 8px; padding: 10px 14px;
  color: var(--white); background: var(--ink); transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }
.section-shell { width: min(100%, var(--max-width)); margin-inline: auto; padding-inline: var(--side); }
.site-header {
  position: fixed; z-index: 100; top: 0; left: 0; width: 100%; height: 82px;
  display: flex; align-items: center; justify-content: space-between; padding-inline: var(--side);
  border-bottom: 1px solid transparent; transition: background .25s, border-color .25s, height .25s;
}
.site-header.scrolled { height: 68px; background: rgba(243, 241, 235, .91); border-color: var(--line); backdrop-filter: blur(16px); }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 13px; font-weight: 800; letter-spacing: .13em; }
.brand-mark { width: 17px; height: 17px; background: var(--ink); clip-path: polygon(0 0, 100% 0, 47% 100%, 0 100%, 35% 40%, 0 40%); }
.site-nav { display: flex; align-items: center; gap: 34px; font-size: 14px; font-weight: 650; }
.site-nav a { transition: opacity .2s; }
.site-nav a:hover { opacity: .58; }
.site-nav .nav-cta { padding: 10px 16px; color: var(--white); background: var(--ink); }
.nav-cta span { margin-left: 10px; }
.menu-button { display: none; border: 0; background: none; }

.hero { min-height: 100svh; padding-top: 160px; display: grid; grid-template-columns: 1.2fr .8fr; gap: clamp(40px, 7vw, 110px); align-content: center; }
.eyebrow, .section-number { margin: 0 0 22px; font-size: 11px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow span { width: 26px; height: 2px; background: var(--ink); }
h1, h2, h3, p { word-break: keep-all; }
h1 { margin: 0; font-size: clamp(47px, 6.35vw, 94px); line-height: 1.04; letter-spacing: -.065em; font-weight: 730; }
h1 em { position: relative; z-index: 1; font-style: normal; }
h1 em::after { content: ""; position: absolute; z-index: -1; left: -.02em; right: -.05em; bottom: .08em; height: .26em; background: var(--accent); transform: rotate(-1deg); }
.hero-description { margin: 36px 0 0; color: var(--ink-soft); font-size: clamp(17px, 1.45vw, 21px); line-height: 1.65; }
.hero-description strong { color: var(--ink); }
.hero-actions { display: flex; align-items: center; gap: 34px; margin-top: 42px; }
.button { min-height: 54px; display: inline-flex; align-items: center; justify-content: space-between; gap: 26px; padding: 0 22px; border: 1px solid var(--ink); font-weight: 750; transition: transform .2s, box-shadow .2s; }
.button:hover { transform: translate(-3px, -3px); box-shadow: 5px 5px 0 rgba(23,36,31,.22); }
.button-dark { min-width: 210px; color: var(--white); background: var(--ink); }
.text-link { font-weight: 700; border-bottom: 1px solid var(--ink); }
.text-link span { margin-left: 8px; }
.hero-board { align-self: center; margin-top: 30px; padding: 22px; background: var(--ink); color: var(--white); box-shadow: 18px 18px 0 var(--paper-deep); transform: rotate(1.2deg); }
.board-top, .proof-label { display: flex; justify-content: space-between; align-items: center; padding-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,.22); font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: .11em; }
.live-dot::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(216,255,85,.12); }
.board-question { padding: 35px 4px 42px; font-size: clamp(24px, 2.2vw, 33px); font-weight: 700; line-height: 1.35; letter-spacing: -.04em; }
.flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: center; gap: 5px; }
.flow-node { padding: 13px 7px; border: 1px solid rgba(255,255,255,.38); text-align: center; font-size: 11px; }
.flow-node span { display: block; margin-bottom: 4px; opacity: .5; font-family: ui-monospace, monospace; font-size: 9px; }
.flow-node.muted { opacity: .48; }
.flow-node.active { color: var(--ink); background: var(--accent); border-color: var(--accent); }
.flow-arrow { color: var(--accent); }
.board-note { display: flex; justify-content: space-between; margin-top: 22px; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.22); color: rgba(255,255,255,.66); font-size: 11px; }
.hero-foot { grid-column: 1 / -1; display: grid; grid-template-columns: auto 1fr auto 1fr auto 1fr; gap: 17px; align-items: center; margin-top: 74px; padding: 20px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hero-foot > span { font: 800 11px/1 ui-monospace, monospace; letter-spacing: .09em; }
.hero-foot p { margin: 0; padding-right: 20px; color: var(--ink-soft); border-right: 1px solid var(--line); font-size: 12px; line-height: 1.45; }
.hero-foot p:last-child { border-right: 0; }

.section-heading h2, .method h2, .operator h2, .faq h2, .contact h2 { margin: 0; font-size: clamp(40px, 5vw, 70px); line-height: 1.13; letter-spacing: -.055em; }
.pain { padding-top: 150px; padding-bottom: 160px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 10vw; }
.pain-list { border-top: 1px solid var(--ink); }
.pain-row { position: relative; display: grid; grid-template-columns: 44px 1fr 1.35fr 30px; gap: 18px; align-items: start; padding: 30px 0; border-bottom: 1px solid var(--line); }
.pain-index { font: 11px/1.7 ui-monospace, monospace; }
.pain-row h3 { margin: 0; font-size: 21px; letter-spacing: -.035em; }
.pain-row p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.pain-icon { width: 28px; height: 28px; display: grid; place-items: center; border: 1px solid var(--ink); border-radius: 50%; }

.dark-section { color: var(--white); background: var(--ink); }
.services { padding: 150px 0; }
.section-heading.light { display: grid; grid-template-columns: .75fr 1.3fr .75fr; gap: 7vw; align-items: end; }
.section-heading.light p:last-child { margin: 0 0 4px; color: rgba(255,255,255,.62); font-size: 15px; }
.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 82px; background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.18); }
.service-card { min-height: 390px; padding: clamp(27px, 4vw, 48px); background: var(--ink); transition: background .25s, color .25s; }
.service-card:hover, .service-card.featured { color: var(--ink); background: var(--accent); }
.card-meta { display: flex; justify-content: space-between; font: 10px/1 ui-monospace, monospace; letter-spacing: .12em; opacity: .65; }
.service-card h3 { margin: 70px 0 18px; font-size: clamp(28px, 3vw, 42px); letter-spacing: -.045em; }
.service-card p { max-width: 490px; margin: 0; color: inherit; opacity: .74; font-size: 15px; }
.service-card ul { display: flex; flex-wrap: wrap; gap: 7px; margin: 34px 0 0; padding: 0; list-style: none; }
.service-card li { padding: 6px 10px; border: 1px solid currentColor; font-size: 11px; font-weight: 700; }

.method { padding-top: 160px; padding-bottom: 150px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 10vw; }
.method-intro > p:last-child { max-width: 420px; margin-top: 32px; color: var(--ink-soft); }
.method-steps { margin: 0; padding: 0; border-top: 1px solid var(--ink); list-style: none; }
.method-steps li { display: grid; grid-template-columns: 55px 1fr auto; align-items: center; gap: 24px; min-height: 128px; border-bottom: 1px solid var(--line); }
.step-number { font: 11px/1 ui-monospace, monospace; }
.method-steps h3 { margin: 0; font-size: 31px; letter-spacing: -.04em; }
.method-steps p { margin: 2px 0 0; color: var(--ink-soft); font-size: 13px; }
.step-output { padding: 7px 11px; border: 1px solid var(--line); font-size: 11px; }

.proof { padding-bottom: 160px; }
.proof .section-heading { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 62px; }
.proof-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; }
.proof-card { min-height: 380px; padding: clamp(25px, 3.5vw, 42px); color: var(--white); background: #31433b; }
.proof-label { color: rgba(255,255,255,.65); }
.before-after { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 28px; margin-top: 66px; }
.before-after > div > span { font: 10px/1 ui-monospace, monospace; color: var(--accent); letter-spacing: .13em; }
.before-after p { margin: 13px 0 0; font-size: 17px; line-height: 1.55; }
.transform-arrow { width: 45px; height: 45px; display: grid; place-items: center; color: var(--ink); background: var(--accent); border-radius: 50%; }
.sample-note { margin: 64px 0 0; color: rgba(255,255,255,.48); font-size: 11px; }
.proof-principles { color: var(--ink); background: var(--accent); }
.proof-principles .proof-label { color: rgba(23,36,31,.62); border-color: rgba(23,36,31,.22); }
.proof-principles ul { margin: 36px 0 0; padding: 0; list-style: none; }
.proof-principles li { display: grid; grid-template-columns: 32px 1fr; gap: 12px; padding: 19px 0; border-bottom: 1px solid rgba(23,36,31,.2); font-weight: 700; }
.proof-principles li span { font: 10px/2 ui-monospace, monospace; }

.programs { padding-bottom: 160px; }
.programs .section-heading { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 58px; }
.program-table { border-top: 1px solid var(--ink); }
.program-row { display: grid; grid-template-columns: 1fr 1.4fr 1.8fr 30px; gap: 20px; align-items: center; min-height: 92px; padding: 0 16px; border-bottom: 1px solid var(--line); }
.program-row:not(.table-head) { transition: background .2s, padding .2s; }
.program-row:not(.table-head):hover { padding-inline: 24px; background: var(--white); }
.program-row > span { color: var(--ink-soft); font-size: 14px; }
.program-row strong { font-size: 20px; }
.program-row > span:last-child { color: var(--ink); font-size: 20px; }
.program-row.table-head { min-height: 44px; font: 10px/1 ui-monospace, monospace; letter-spacing: .08em; }
.program-row.table-head span { font-size: 10px; }

.operator { padding: 150px 0; }
.operator-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 10vw; align-items: center; }
.operator-visual { position: relative; aspect-ratio: 1; display: grid; place-items: center; overflow: hidden; color: var(--ink); background: var(--accent); }
.operator-initial { font-size: clamp(180px, 25vw, 360px); font-weight: 800; line-height: 1; letter-spacing: -.1em; }
.operator-orbit { position: absolute; border: 1px solid rgba(23,36,31,.5); border-radius: 50%; }
.orbit-one { width: 130%; height: 48%; transform: rotate(35deg); }
.orbit-two { width: 130%; height: 48%; transform: rotate(-35deg); }
.operator-visual p { position: absolute; right: 20px; bottom: 15px; margin: 0; font: 10px/1.4 ui-monospace, monospace; text-align: right; }
.operator-copy > p:not(.section-number):not(.operator-name) { max-width: 620px; color: rgba(255,255,255,.68); }
.operator-name { margin: 45px 0 26px; padding-bottom: 18px; border-bottom: 1px solid rgba(255,255,255,.2); font-size: 21px; font-weight: 750; }
.operator-name span { margin-left: 12px; color: rgba(255,255,255,.5); font-size: 12px; font-weight: 500; }
.operator-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 35px; }
.operator-tags span { padding: 7px 10px; border: 1px solid rgba(255,255,255,.35); font: 10px/1 ui-monospace, monospace; }

.faq { padding-top: 150px; padding-bottom: 160px; display: grid; grid-template-columns: .7fr 1.3fr; gap: 11vw; }
.faq-intro > p:last-child { max-width: 300px; color: var(--ink-soft); }
.faq-list { border-top: 1px solid var(--ink); }
details { border-bottom: 1px solid var(--line); }
summary { display: flex; justify-content: space-between; align-items: center; padding: 27px 0; list-style: none; font-size: 18px; font-weight: 700; }
summary::-webkit-details-marker { display: none; }
summary span { font-size: 24px; font-weight: 400; transition: transform .2s; }
details[open] summary span { transform: rotate(45deg); }
details p { max-width: 650px; margin: -6px 0 27px; color: var(--ink-soft); font-size: 14px; }

.contact { padding: 150px 0; color: var(--white); background: #31433b; }
.contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 10vw; }
.contact-copy > p:not(.section-number) { max-width: 440px; margin: 28px 0 50px; color: rgba(255,255,255,.68); }
.contact-promise { display: flex; gap: 15px; padding: 13px 0; border-top: 1px solid rgba(255,255,255,.2); font-size: 13px; }
.contact-promise span { font: 10px/2 ui-monospace, monospace; color: var(--accent); }
.contact-form { padding: clamp(25px, 4vw, 50px); color: var(--ink); background: var(--paper); }
.form-field { margin-bottom: 24px; }
.form-field label { display: block; margin-bottom: 7px; font-size: 12px; font-weight: 750; }
.form-field label span { color: #e14c31; }
.form-field input, .form-field textarea { width: 100%; padding: 13px 0; border: 0; border-bottom: 1px solid var(--line); outline: none; color: var(--ink); background: transparent; border-radius: 0; }
.form-field textarea { resize: vertical; }
.form-field input:focus, .form-field textarea:focus { border-color: var(--ink); }
.hidden-field { position: absolute; left: -9999px; }
.consent { display: flex; gap: 9px; align-items: flex-start; margin: 8px 0 25px; color: var(--ink-soft); font-size: 11px; }
.consent input { margin-top: 4px; accent-color: var(--ink); }
.button-accent { width: 100%; color: var(--ink); background: var(--accent); }
.button-accent:disabled { cursor: wait; opacity: .6; }
.form-status { min-height: 24px; margin: 13px 0 -10px; font-size: 12px; }
.form-status.is-error { color: #aa2a18; }

.site-footer { min-height: 310px; display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 30px; align-items: end; padding: 70px var(--side) 45px; color: var(--white); background: var(--ink); }
.footer-brand { font-size: clamp(48px, 6vw, 86px); font-weight: 800; line-height: .82; letter-spacing: -.08em; }
.footer-message { color: var(--accent); font: 700 13px/1.35 ui-monospace, monospace; }
.footer-meta { color: rgba(255,255,255,.55); font-size: 11px; }
.footer-meta p { margin: 4px 0; }
.footer-meta a { color: inherit; text-underline-offset: 2px; }
.back-top { width: 48px; height: 48px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.35); }

.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(20px); transition: opacity .65s ease, transform .65s ease; }
.js .reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 900px) {
  .site-header { height: 68px; }
  .menu-button { width: 42px; height: 42px; display: grid; place-content: center; gap: 6px; }
  .menu-button > span:not(.sr-only) { width: 22px; height: 1px; display: block; background: var(--ink); transition: transform .2s; }
  .menu-button[aria-expanded="true"] > span:nth-last-child(2) { transform: translateY(3.5px) rotate(45deg); }
  .menu-button[aria-expanded="true"] > span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .site-nav { position: fixed; inset: 68px 0 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 28px var(--side); background: var(--paper); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 18px 0; border-bottom: 1px solid var(--line); font-size: 22px; }
  .site-nav .nav-cta { margin-top: 18px; padding: 16px; text-align: center; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 128px; }
  .hero-board { width: min(100%, 580px); margin-top: 10px; }
  .hero-foot { margin-top: 36px; grid-template-columns: auto 1fr; }
  .hero-foot p { border-right: 0; }
  .pain, .method, .faq, .operator-grid, .contact-grid { grid-template-columns: 1fr; gap: 60px; }
  .pain { padding-block: 110px; }
  .section-heading.light { grid-template-columns: 1fr; }
  .section-heading.light > p:last-child { max-width: 500px; }
  .services { padding-block: 110px; }
  .proof .section-heading, .programs .section-heading { display: block; }
  .proof .section-heading h2, .programs .section-heading h2 { margin-top: 18px; }
  .operator-visual { width: min(100%, 520px); }
}

@media (max-width: 640px) {
  :root { --side: 20px; }
  .desktop-only { display: none; }
  h1 { font-size: clamp(43px, 13vw, 64px); }
  .hero { padding-top: 112px; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 19px; }
  .text-link { width: fit-content; }
  .hero-board { margin-inline: 0; padding: 17px; box-shadow: 9px 9px 0 var(--paper-deep); transform: none; }
  .board-question { padding-block: 28px 34px; font-size: 23px; }
  .flow { gap: 3px; }
  .flow-node { padding: 10px 2px; font-size: 9px; }
  .flow-arrow { font-size: 11px; }
  .hero-foot { padding-block: 17px; }
  .pain-row { grid-template-columns: 34px 1fr 28px; gap: 10px; }
  .pain-row p { grid-column: 2 / -1; padding-right: 20px; }
  .pain-icon { grid-column: 3; grid-row: 1; }
  .service-grid, .proof-grid { grid-template-columns: 1fr; }
  .service-card { min-height: 340px; }
  .service-card h3 { margin-top: 55px; }
  .method, .proof, .programs, .faq { padding-bottom: 110px; }
  .method { padding-top: 110px; }
  .method-steps li { grid-template-columns: 37px 1fr; gap: 12px; padding-block: 22px; }
  .step-output { grid-column: 2; width: fit-content; }
  .before-after { grid-template-columns: 1fr; gap: 18px; margin-top: 42px; }
  .transform-arrow { transform: rotate(90deg); }
  .sample-note { margin-top: 38px; }
  .program-row { grid-template-columns: 1fr 1.1fr 24px; padding-block: 18px; }
  .program-row > span:nth-child(3) { grid-column: 1 / 3; grid-row: 2; }
  .program-row > span:last-child { grid-column: 3; grid-row: 1; }
  .program-row.table-head { display: none; }
  .operator { padding-block: 100px; }
  .operator-name span { display: block; margin: 3px 0 0; }
  .contact { padding-block: 100px; }
  .contact-form { margin-inline: -4px; }
  .site-footer { grid-template-columns: 1fr auto; min-height: 380px; }
  .footer-message, .footer-meta { grid-column: 1; }
  .back-top { grid-column: 2; grid-row: 3; }
}

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