:root {
  --paper: #f3efe4;
  --paper-warm: #e8dfca;
  --ink: #17241d;
  --ink-soft: #526057;
  --forest: #0d4d3d;
  --forest-deep: #072e25;
  --citrus: #d9ef57;
  --coral: #ee765d;
  --line: rgba(23, 36, 29, 0.18);
  --white: #fffdf7;
  --shadow: 0 28px 70px rgba(31, 51, 42, 0.14);
  --display: "Noto Serif KR", "Nanum Myeongjo", Georgia, serif;
  --sans: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 8%, rgba(217, 239, 87, 0.22), transparent 28rem),
    linear-gradient(135deg, rgba(255,255,255,0.42) 1px, transparent 1px),
    var(--paper);
  background-size: auto, 36px 36px, auto;
  font-family: var(--sans);
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--coral); outline-offset: 4px; }
.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; left: 1rem; top: 1rem; z-index: 100; transform: translateY(-180%); background: var(--ink); color: white; padding: .7rem 1rem; border-radius: .3rem; }
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  min-height: 78px;
  padding: 1rem clamp(1.2rem, 5vw, 5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  border-bottom: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
}
.site-header[data-scrolled] { background: rgba(243, 239, 228, .9); border-color: var(--line); backdrop-filter: blur(16px); }
.brand { display: inline-flex; align-items: center; gap: .78rem; text-decoration: none; }
.brand-mark { width: 42px; aspect-ratio: 1; display: grid; place-items: center; color: var(--citrus); background: var(--forest); border-radius: 50% 50% 46% 54% / 56% 42% 58% 44%; font-family: var(--display); font-weight: 800; font-size: 1.35rem; transform: rotate(-6deg); }
.brand-copy { display: grid; line-height: 1.1; }
.brand-copy strong { font-family: var(--display); font-size: 1.1rem; letter-spacing: -.02em; }
.brand-copy small { margin-top: .28rem; color: var(--ink-soft); font-size: .66rem; letter-spacing: .08em; text-transform: uppercase; }
.primary-nav { display: flex; align-items: center; gap: clamp(1.2rem, 3vw, 2.5rem); }
.primary-nav a { position: relative; text-decoration: none; font-size: .9rem; font-weight: 750; }
.primary-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -.35rem; height: 2px; background: var(--coral); transition: right .2s ease; }
.primary-nav a:hover::after { right: 0; }
.nav-toggle { display: none; border: 0; background: transparent; width: 44px; height: 44px; padding: 10px; }
.nav-toggle span:not(.sr-only) { display: block; height: 2px; margin: 5px 0; background: var(--ink); }

main { overflow: clip; }
.hero {
  position: relative;
  min-height: 100svh;
  padding: clamp(8.5rem, 15vw, 12rem) clamp(1.2rem, 7vw, 7rem) clamp(5rem, 9vw, 8rem);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, .95fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 8rem);
}
.hero::before { content: ""; position: absolute; width: clamp(280px, 42vw, 650px); aspect-ratio: 1; right: -12%; top: 8%; border: 1px solid rgba(13,77,61,.22); border-radius: 48% 52% 43% 57% / 53% 39% 61% 47%; animation: drift 16s ease-in-out infinite alternate; }
.hero-grid { position: absolute; inset: 0; opacity: .26; pointer-events: none; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(to right, black, transparent 72%); }
.hero-copy { position: relative; z-index: 2; max-width: 760px; }
.eyebrow { margin: 0 0 1rem; color: var(--forest); font-size: .74rem; font-weight: 850; letter-spacing: .22em; }
.hero h1, .section-heading h2, .pilot h2, .contact h2 { margin: 0; font-family: var(--display); font-weight: 700; letter-spacing: -.055em; line-height: 1.14; }
.hero h1 { font-size: clamp(3rem, 6.8vw, 6.9rem); }
.hero h1 em { color: var(--forest); font-style: normal; background: linear-gradient(transparent 65%, rgba(217,239,87,.72) 65%); }
.hero-lead { max-width: 650px; margin: 2rem 0 0; color: var(--ink-soft); font-size: clamp(1.02rem, 1.5vw, 1.25rem); }
.hero-actions, .pilot-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .85rem; margin-top: 2rem; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: .65rem; padding: .75rem 1.25rem; border: 1px solid transparent; border-radius: 999px; text-decoration: none; font-weight: 800; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-3px); }
.button-primary { color: white; background: var(--forest); box-shadow: 0 12px 28px rgba(13,77,61,.2); }
.button-primary:hover { background: var(--forest-deep); }
.button-quiet { border-color: var(--line); background: rgba(255,255,255,.32); }
.button-outline { color: var(--forest-deep); border-color: rgba(7,46,37,.38); background: rgba(255,255,255,.4); }
.button-dark { color: var(--citrus); background: var(--ink); }
.new-tab-note { color: var(--ink-soft); font-size: .78rem; margin-top: 1rem; }

.hero-orbit { position: relative; z-index: 2; min-height: 530px; }
.hero-orbit::before, .hero-orbit::after { content: ""; position: absolute; inset: 8% 4%; border: 1px solid rgba(13,77,61,.25); border-radius: 50%; transform: rotate(-12deg); }
.hero-orbit::after { inset: 20% 17%; transform: rotate(28deg); border-style: dashed; }
.orbit-center { position: absolute; left: 50%; top: 50%; width: 116px; aspect-ratio: 1; display: grid; place-items: center; transform: translate(-50%,-50%) rotate(-7deg); border-radius: 32% 68% 58% 42% / 46% 38% 62% 54%; color: var(--forest-deep); background: var(--citrus); font-family: var(--display); font-size: 2rem; font-weight: 900; box-shadow: var(--shadow); }
.orbit-card { position: absolute; width: min(230px, 45%); padding: 1.25rem; display: grid; background: rgba(255,253,247,.92); border: 1px solid rgba(13,77,61,.18); border-radius: 1.2rem; box-shadow: var(--shadow); }
.orbit-card strong { font-family: var(--display); font-size: clamp(1.4rem, 2.4vw, 2rem); }
.orbit-card small { color: var(--ink-soft); }
.orbit-kicker { margin-bottom: .45rem; color: var(--coral); font-size: .62rem; font-weight: 900; letter-spacing: .16em; }
.orbit-main { top: 0; left: 8%; transform: rotate(-4deg); }
.orbit-math { top: 20%; right: 0; transform: rotate(4deg); }
.orbit-board { left: 15%; bottom: 0; transform: rotate(2deg); }

.manifesto, .services, .pilot, .maker, .stories, .contact { padding: clamp(5rem, 9vw, 9rem) clamp(1.2rem, 7vw, 7rem); }
.manifesto { color: white; background: var(--forest-deep); }
.manifesto .eyebrow { color: var(--citrus); }
.section-heading h2, .pilot h2, .contact h2 { font-size: clamp(2.35rem, 4.4vw, 4.8rem); }
.principle-grid { margin-top: clamp(3rem, 7vw, 6rem); display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(255,255,255,.18); }
.principle-grid article { min-height: 300px; padding: clamp(1.5rem, 3vw, 3rem); background: var(--forest-deep); }
.principle-number { display: block; color: var(--citrus); font-family: var(--display); font-size: 1.05rem; }
.principle-grid h3 { margin: 4rem 0 1rem; font-family: var(--display); font-size: 1.55rem; }
.principle-grid p { margin: 0; color: rgba(255,255,255,.7); }

.services { background: var(--white); }
.split-heading { display: grid; grid-template-columns: 1.1fr .9fr; align-items: end; gap: 3rem; }
.split-heading > p { max-width: 540px; margin: 0 0 .5rem; color: var(--ink-soft); }
.work-grid { margin-top: clamp(3rem, 6vw, 5.5rem); display: grid; grid-template-columns: repeat(6, 1fr); gap: 1rem; }
.work-card { position: relative; min-height: 380px; padding: clamp(1.5rem, 3vw, 2.6rem); display: flex; flex-direction: column; overflow: hidden; grid-column: span 2; border: 1px solid var(--line); border-radius: 1.3rem; background: var(--paper); }
.work-card:nth-child(4), .work-card:nth-child(5) { grid-column: span 3; }
.work-card::before { content: ""; position: absolute; width: 150px; aspect-ratio: 1; right: -65px; top: -65px; border: 1px solid var(--forest); border-radius: 50%; opacity: .13; }
.work-featured { color: white; background: var(--forest); }
.work-featured p { color: rgba(255,255,255,.76); }
.work-maker { background: #e7edc3; }
.work-number { position: absolute; right: 1.5rem; top: 1.2rem; color: var(--coral); font-family: var(--display); font-weight: 900; }
.work-card h3 { margin: .65rem 0 1rem; font-family: var(--display); font-size: clamp(1.8rem, 2.7vw, 2.8rem); line-height: 1.2; letter-spacing: -.04em; }
.work-card > p:not(.service-code) { margin: 0; color: var(--ink-soft); }
.work-featured > p:not(.service-code) { color: rgba(255,255,255,.76); }
.work-card .text-link { margin-top: auto; padding-top: 1.5rem; }
.work-note { width: fit-content; margin-top: auto; padding: .45rem .7rem; color: var(--forest-deep); background: rgba(255,255,255,.58); border-radius: 999px; font-size: .76rem; font-weight: 800; }
.service-card { position: relative; min-height: 510px; padding: clamp(1.5rem, 3vw, 2.6rem); display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: 1.3rem; background: var(--paper); }
.service-card::before { content: ""; position: absolute; right: -70px; top: -70px; width: 180px; aspect-ratio: 1; border: 1px solid currentColor; border-radius: 50%; opacity: .16; }
.service-public { color: white; background: var(--forest); }
.service-public p, .service-public li { color: rgba(255,255,255,.76); }
.service-code { margin: 4rem 0 0; color: var(--ink-soft); font-size: .68rem; font-weight: 850; letter-spacing: .2em; }
.service-card h3 { margin: .65rem 0 1rem; font-family: var(--display); font-size: clamp(2.1rem, 3.4vw, 3.3rem); letter-spacing: -.04em; }
.service-card > p:not(.service-code) { margin: 0; }
.service-card ul { margin: 1.5rem 0; padding-left: 1.2rem; }
.service-status { position: absolute; top: 1.4rem; right: 1.4rem; padding: .35rem .65rem; border-radius: 999px; font-size: .7rem; font-weight: 800; }
.status-public { color: var(--forest-deep); background: var(--citrus); }
.status-pilot { color: #7a3324; background: #ffd9cf; }
.text-link { width: fit-content; margin-top: auto; font-weight: 850; text-decoration-thickness: 1px; text-underline-offset: .35rem; }
.pilot-lock { margin: 1.6rem 0; padding: 1rem; display: flex; gap: .6rem; color: #714438; background: #f5dfd8; border-radius: .8rem; font-size: .86rem; }
.pilot-lock span { color: var(--coral); font-size: .55rem; padding-top: .25rem; }

.pilot { background: linear-gradient(120deg, var(--paper-warm), var(--paper)); }
.pilot-panel { position: relative; padding: clamp(2rem, 6vw, 6rem); overflow: hidden; border: 1px solid rgba(13,77,61,.26); border-radius: 2rem; background: rgba(255,253,247,.68); box-shadow: var(--shadow); }
.pilot-panel::after { content: "PILOT"; position: absolute; right: -1rem; bottom: -4rem; color: rgba(13,77,61,.055); font-family: var(--display); font-size: clamp(7rem, 18vw, 16rem); font-weight: 900; line-height: 1; pointer-events: none; }
.pilot-copy { position: relative; z-index: 1; max-width: 850px; }
.pilot-copy > p:last-child { max-width: 740px; color: var(--ink-soft); }
.pilot-steps { position: relative; z-index: 1; margin: 3rem 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); list-style: none; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.pilot-steps li { padding: 1.5rem 1rem; display: grid; grid-template-columns: auto 1fr; column-gap: .85rem; }
.pilot-steps li + li { border-left: 1px solid var(--line); }
.pilot-steps span { grid-row: 1 / 3; width: 32px; height: 32px; display: grid; place-items: center; color: var(--citrus); background: var(--forest); border-radius: 50%; font-weight: 900; }
.pilot-steps strong { font-family: var(--display); font-size: 1.05rem; }
.pilot-steps small { color: var(--ink-soft); }
.pilot-actions, .pilot-notice { position: relative; z-index: 1; }
.pilot-notice { color: var(--ink-soft); font-size: .8rem; }

.maker { color: white; background: var(--forest); }
.maker .eyebrow { color: var(--citrus); }
.maker-intro { max-width: 950px; }
.maker h2 { margin: 0; font-family: var(--display); font-size: clamp(2.35rem, 4.4vw, 4.8rem); line-height: 1.14; letter-spacing: -.055em; }
.maker-intro > p:last-child { max-width: 720px; color: rgba(255,255,255,.72); }
.equipment-list { margin-top: 3rem; display: flex; flex-wrap: wrap; gap: .75rem; }
.equipment-list span { padding: .7rem 1rem; border: 1px solid rgba(255,255,255,.3); border-radius: 999px; background: rgba(255,255,255,.08); font-weight: 800; }
.maker-flow { margin: 3rem 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); list-style: none; counter-reset: maker-step; border-top: 1px solid rgba(255,255,255,.24); }
.maker-flow li { position: relative; padding: 2rem 1rem 1rem 3.2rem; counter-increment: maker-step; }
.maker-flow li::before { content: "0" counter(maker-step); position: absolute; left: 0; top: 1.8rem; color: var(--citrus); font-family: var(--display); font-weight: 900; }
.maker-flow li + li { border-left: 1px solid rgba(255,255,255,.24); }
.maker-flow strong, .maker-flow small { display: block; }
.maker-flow strong { font-family: var(--display); font-size: 1.2rem; }
.maker-flow small, .maker-note { color: rgba(255,255,255,.65); }
.maker-note { margin-top: 2rem; font-size: .8rem; }

.stories { background: #f7f1e7; }
.story-grid { margin-top: 3rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.story-grid article { min-height: 270px; padding: 2rem; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 1.2rem; background: rgba(255,255,255,.56); }
.story-grid span { color: var(--coral); font-size: .68rem; font-weight: 900; letter-spacing: .16em; }
.story-grid h3 { margin: 2.6rem 0 .6rem; font-family: var(--display); font-size: 1.45rem; }
.story-grid p { margin: 0; color: var(--ink-soft); }
.story-grid small { margin-top: auto; padding-top: 1.5rem; color: var(--forest); font-weight: 850; }

.contact { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(3rem, 8vw, 8rem); color: white; background: var(--coral); }
.contact .eyebrow { color: var(--ink); }
.contact-copy { align-self: end; }
.contact-copy p { max-width: 540px; color: rgba(255,255,255,.82); }
.site-footer { padding: 2rem clamp(1.2rem, 7vw, 7rem); display: flex; align-items: end; justify-content: space-between; gap: 2rem; color: rgba(255,255,255,.72); background: var(--ink); }
.site-footer strong { color: white; font-family: var(--display); font-size: 1.3rem; }
.site-footer p { margin: .25rem 0 0; font-size: .78rem; }

[data-kcs-reveal] { opacity: 0; transform: translateY(26px); }
[data-kcs-reveal][data-visible] { opacity: 1; transform: none; transition: opacity .65s ease calc(var(--reveal-order, 0) * 80ms), transform .65s ease calc(var(--reveal-order, 0) * 80ms); }
@keyframes drift { to { transform: rotate(16deg) translate(-2%, 3%); border-radius: 62% 38% 50% 50% / 38% 57% 43% 62%; } }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero-orbit { min-height: 470px; max-width: 620px; width: 100%; margin-inline: auto; }
  .split-heading, .contact { grid-template-columns: 1fr; }
  .work-grid { grid-template-columns: 1fr 1fr; }
  .work-card, .work-card:nth-child(4), .work-card:nth-child(5) { grid-column: span 1; }
  .service-card { min-height: auto; }
  .principle-grid { grid-template-columns: 1fr; }
  .principle-grid article { min-height: 230px; }
  .principle-grid h3 { margin-top: 2rem; }
  .story-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .site-header { min-height: 68px; padding: .8rem 1rem; }
  .brand-copy small { display: none; }
  .nav-toggle { display: block; }
  .primary-nav { position: absolute; top: calc(100% + 1px); left: 1rem; right: 1rem; padding: .75rem; display: none; flex-direction: column; align-items: stretch; gap: 0; border: 1px solid var(--line); border-radius: 1rem; background: rgba(255,253,247,.97); box-shadow: var(--shadow); }
  .primary-nav[data-open] { display: flex; }
  .primary-nav a { padding: .75rem; }
  .hero { padding-top: 7.5rem; }
  .hero h1 { font-size: clamp(2.75rem, 13vw, 4.4rem); }
  .hero-actions, .pilot-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .hero-orbit { min-height: 400px; }
  .orbit-card { width: 55%; padding: 1rem; }
  .orbit-main { left: 0; }
  .orbit-math { right: 0; }
  .orbit-board { left: 4%; }
  .orbit-center { width: 84px; font-size: 1.4rem; }
  .pilot-steps { grid-template-columns: 1fr; }
  .pilot-steps li + li { border-left: 0; border-top: 1px solid var(--line); }
  .work-grid { grid-template-columns: 1fr; }
  .work-card { min-height: 330px; }
  .maker-flow { grid-template-columns: 1fr 1fr; }
  .maker-flow li:nth-child(3) { border-left: 0; }
  .maker-flow li:nth-child(n+3) { border-top: 1px solid rgba(255,255,255,.24); }
  .site-footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}


/* Current public services only */
.work-grid[data-current-services] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.work-grid[data-current-services] .work-card {
  grid-column: span 1;
}
@media (max-width: 900px) {
  .work-grid[data-current-services] { grid-template-columns: 1fr; }
}


/* KCSedutech philosophy */
.philosophy{padding:clamp(5rem,10vw,9rem) clamp(1.25rem,6vw,7rem);background:#f4efe4;color:#14251d}.philosophy-heading{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(18rem,.8fr);gap:1.5rem 4rem;align-items:end;max-width:76rem;margin:0 auto 3rem}.philosophy-heading .eyebrow,.philosophy-heading h2{grid-column:1}.philosophy-heading>p:last-child{grid-column:2;grid-row:1/span 2;align-self:end;max-width:34rem;line-height:1.8}.philosophy-heading h2,.learning-flow h2{margin:0;font-size:clamp(2.5rem,6vw,5.5rem);line-height:.98;letter-spacing:-.055em}.value-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;max-width:76rem;margin:0 auto}.value-card{min-height:18rem;padding:2rem;border:1px solid rgba(20,37,29,.18);border-radius:1.5rem;background:rgba(255,255,255,.55)}.value-card>span{color:#eb654f;font-weight:800;letter-spacing:.12em}.value-card h3{margin:3rem 0 1rem;font-size:clamp(1.65rem,3vw,2.35rem)}.value-card p{margin:0;line-height:1.75}.mission-statement{display:grid;grid-template-columns:12rem 1fr;gap:2rem;max-width:76rem;margin:1rem auto 0;padding:2rem 0;border-top:1px solid rgba(20,37,29,.2);border-bottom:1px solid rgba(20,37,29,.2)}.mission-statement p{margin:0}.mission-statement>p:last-child{max-width:58rem;font-size:clamp(1.25rem,2.4vw,2rem);line-height:1.55}.learning-flow{padding:clamp(5rem,10vw,9rem) clamp(1.25rem,6vw,7rem);background:#0d503e;color:#fffdf5}.learning-flow-copy,.learning-flow-list,.learning-flow-note{max-width:76rem;margin-right:auto;margin-left:auto}.learning-flow-copy{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(18rem,.7fr);gap:1.5rem 4rem;align-items:end}.learning-flow-copy .eyebrow,.learning-flow-copy h2{grid-column:1}.learning-flow-copy>p:last-child{grid-column:2;grid-row:1/span 2;margin:0;line-height:1.8;color:rgba(255,253,245,.78)}.learning-flow-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:3.5rem;padding:0;list-style:none;border-top:1px solid rgba(255,255,255,.25);border-bottom:1px solid rgba(255,255,255,.25)}.learning-flow-list li{display:flex;flex-direction:column;gap:1.5rem;min-height:10rem;padding:1.5rem;border-right:1px solid rgba(255,255,255,.2)}.learning-flow-list li:last-child{border-right:0}.learning-flow-list span{color:#dce64c;font-weight:800}.learning-flow-list strong{margin-top:auto;font-size:1.15rem}.learning-flow-note{margin-top:1.5rem;color:rgba(255,253,245,.68);font-size:.92rem;line-height:1.7}
@media(max-width:900px){.philosophy-heading,.learning-flow-copy{grid-template-columns:1fr}.philosophy-heading>p:last-child,.learning-flow-copy>p:last-child{grid-column:1;grid-row:auto}.value-grid{grid-template-columns:1fr}.value-card{min-height:0}.value-card h3{margin-top:1.75rem}.mission-statement{grid-template-columns:1fr}.learning-flow-list{grid-template-columns:repeat(2,minmax(0,1fr))}.learning-flow-list li:nth-child(2){border-right:0}.learning-flow-list li:nth-child(-n+2){border-bottom:1px solid rgba(255,255,255,.2)}}
@media(max-width:560px){.learning-flow-list{grid-template-columns:1fr}.learning-flow-list li,.learning-flow-list li:nth-child(2){border-right:0;border-bottom:1px solid rgba(255,255,255,.2)}.learning-flow-list li:last-child{border-bottom:0}}