:root{--ink:#102923;--paper:#f4f1e8;--green:#064d3e;--lime:#dff06d;--yellow:#f5ca17;--red:#df241e;--blue:#0649ac;--line:rgba(16,41,35,.18)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:Arial,"Noto Sans KR",sans-serif;line-height:1.65}a{color:inherit;text-decoration:none}header{height:76px;display:flex;align-items:center;padding:0 4vw;gap:35px;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;background:rgba(244,241,232,.94);backdrop-filter:blur(12px)}.logo{font-weight:800;letter-spacing:.13em;margin-right:auto}nav{display:flex;gap:22px;font-size:13px}.hero{min-height:calc(100vh - 76px);padding:7vw;display:grid;grid-template-columns:1.15fr .85fr;gap:8vw;align-items:center}.eyebrow,small{font-size:12px;font-weight:800;letter-spacing:.15em;color:#116d58}.hero h1,h2{font-family:Georgia,"Noto Serif KR",serif;letter-spacing:-.06em;line-height:1.07}.hero h1{font-size:clamp(58px,8vw,118px);margin:20px 0}.hero h1 em{font-style:normal;color:var(--green)}.lead{font-size:20px;max-width:640px;color:#435c55}.actions{display:flex;gap:28px;align-items:center;margin-top:35px;font-weight:700}.primary{display:inline-block;background:var(--ink);color:white;padding:15px 20px}.symbol{aspect-ratio:1;border-radius:50%;background:var(--green);color:white;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:clamp(22px,3vw,42px);letter-spacing:.15em;box-shadow:0 28px 80px #164a3a35}.symbol b{color:var(--lime);font-size:1.55em}.symbol p{font-size:13px;letter-spacing:.08em}.split,.four{padding:115px 7vw;display:grid;grid-template-columns:.8fr 1.2fr;gap:9vw;border-top:1px solid var(--line)}h2{font-size:clamp(44px,6vw,80px);margin:17px 0}.copy{font-size:18px}.big{font-family:Georgia,"Noto Serif KR",serif;font-size:clamp(27px,3vw,42px);line-height:1.4}.steps{display:grid;grid-template-columns:1fr 1fr;margin-top:50px;border:1px solid var(--ink)}.steps span{padding:23px;border:1px solid var(--line)}.steps b{display:block;color:#0b765e}.why,.archive,.challenge,.ai{padding:115px 7vw}.why{background:var(--green);color:white}.why small,.archive small{color:var(--lime)}.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#ffffff35;margin-top:55px}.why-grid article{padding:35px;background:var(--green)}.why-grid article>b{color:var(--lime);letter-spacing:.12em}.why-grid h3{font-size:25px}.why-grid p{color:#cee0db}.archive{background:var(--ink);color:white}.archive-head{max-width:790px}.archive-head>p{font-size:18px;color:#b9cac5}.cards{display:grid;grid-template-columns:1.1fr 1fr .8fr;gap:12px;margin-top:55px}.cards article{padding:34px;min-height:360px;background:#24443c;display:flex;flex-direction:column}.cards .green{background:var(--lime);color:var(--ink)}.cards .yellow{background:var(--yellow);color:var(--ink)}.cards h3{font-family:Georgia,"Noto Serif KR",serif;font-size:29px;line-height:1.35}.cards button{margin-top:auto;align-self:flex-start;background:none;border:0;border-bottom:1px solid currentColor;padding:8px 0;font-weight:700;cursor:pointer}.archive-detail{padding:25px;margin-top:12px;background:white;color:var(--ink)}.challenge{display:grid;grid-template-columns:1fr 1fr;gap:9vw;background:#e6eee4}.lead2{font-size:18px}.challenge ol{list-style:none;padding:0;margin-top:35px}.challenge li{padding:15px 0;border-top:1px solid var(--line)}.challenge li b{margin-right:20px;color:#0b765e}.challenge form{background:white;padding:35px;display:grid;gap:16px}.challenge label{font-size:13px;font-weight:700}.challenge input,.challenge select,.challenge textarea{display:block;width:100%;padding:11px;margin-top:6px;border:1px solid #becbc7;background:white}.challenge label i{display:block;font-weight:400;color:#6b7c76}.challenge .agree{display:flex;align-items:center;gap:8px}.challenge .agree input{width:auto;margin:0}.challenge button{padding:15px;background:var(--ink);color:white;border:0;font-weight:700}.challenge form>p{font-size:12px;color:#6b7c76;margin:0}#result{grid-column:2;background:var(--lime);padding:22px}.ai{text-align:center;background:#ef7046}.ai small{color:var(--ink)}.ai h2{max-width:900px;margin:18px auto}.road{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;align-items:center;gap:24px;margin-top:55px;text-align:left}.road article{background:#ffffffb9;padding:28px;min-height:200px}.road b{font-size:12px}.road h3{font-size:23px}footer{background:#061b15;color:white;padding:55px 7vw;display:grid;grid-template-columns:1fr 1fr auto;align-items:end}footer b{letter-spacing:.14em}footer p{color:#afc1bb}
@media(max-width:900px){nav{display:none}.hero,.split,.challenge,.four{grid-template-columns:1fr}.symbol{width:min(100%,520px);justify-self:center}.why-grid,.cards{grid-template-columns:1fr}.steps{grid-template-columns:1fr}.road{grid-template-columns:1fr}.road>i{transform:rotate(90deg);justify-self:center}#result{grid-column:1}footer{grid-template-columns:1fr;gap:12px}}@media(max-width:520px){header{height:64px}.hero,.split,.why,.archive,.challenge,.four,.ai{padding:75px 22px}.hero h1{font-size:52px}.actions{align-items:flex-start;flex-direction:column}}

/* 4-Window: the supplied platform is the working example. */
.four{display:block;background:#ece7dc;scroll-margin-top:76px}
.four-intro{display:grid;grid-template-columns:1fr 1fr;gap:5vw;align-items:center}
.four-explanation{font-size:1.125rem;min-width:0}
.four-explanation .primary{margin-top:1rem;font-size:1rem}
.four-example{margin-top:2.5rem;border:1px solid var(--line);background:var(--paper)}
.four-example-heading{padding:1rem 1.25rem;display:flex;gap:1rem;flex-wrap:wrap;align-items:center;justify-content:space-between}
.four-example-heading strong{font-size:1rem}
.four-example-heading span{font-size:.875rem}
.four-example iframe{display:block;width:100%;height:38rem;height:clamp(30rem,70vh,46rem);border:0;border-block:1px solid var(--line);background:#f0ede8}
.four-return{padding:.75rem 1.25rem;margin:0;font-size:.875rem}
.four-table-wrap{margin-top:2rem;overflow-x:auto}
.four-roles{border-collapse:collapse;width:100%;min-width:36rem;text-align:left;font-size:1rem;line-height:1.65}
.four-roles caption{text-align:left;font-size:1.25rem;font-weight:700;margin-bottom:1rem}
.four-roles th,.four-roles td{padding:1rem;vertical-align:top;border-bottom:1px solid var(--line)}
.four-roles thead th{font-size:.875rem;border-block:1px solid var(--ink)}
.four-roles tbody th{width:21%;font-size:1rem}
.four-roles tbody td:nth-child(2){width:32%}
.four a:focus-visible,.four-table-wrap:focus-visible{outline:3px solid var(--green);outline-offset:4px}
@media(max-width:900px){.four-intro{grid-template-columns:1fr;gap:1rem}}
@media(max-width:520px){.four{scroll-margin-top:64px}.four-example-heading{padding:1rem}.four-return{padding:.75rem 1rem}}

/* Live platform and actual published work */
html{scroll-padding-top:90px}body{font-family:system-ui,-apple-system,"Noto Sans KR",sans-serif}nav{font-size:14px;flex-wrap:wrap}small,.eyebrow{font-size:13px}.hero{min-height:0;padding:65px 5vw;grid-template-columns:1fr 1.1fr;gap:4vw}.hero h1{font-size:clamp(42px,4.5vw,70px);letter-spacing:-.045em;line-height:1.17}.lead{font-size:18px}.live-preview{min-width:0;border:1px solid var(--line);background:white;box-shadow:0 20px 60px #10292314}.preview-title{padding:15px;display:flex;justify-content:space-between;font-size:14px}.live-preview iframe{width:100%;height:370px;border:0;display:block}.live-preview p{font-size:14px;margin:0;padding:12px 15px}.archive-link{margin-top:auto;text-decoration:underline;font-weight:650}.published-challenge{padding:80px 7vw;display:grid;grid-template-columns:1fr 1.2fr;gap:4vw;background:#e6eee4}.published-challenge h2{font-size:clamp(38px,4.5vw,65px)}.real-record{display:flex;align-items:center;gap:24px;background:white;padding:24px}.real-record video{width:42%;max-height:420px;background:#102923}.real-record h3{font-size:24px;line-height:1.45}.real-record a{text-decoration:underline;font-weight:650}.record-date{font-size:32px;color:var(--green)}.future{padding:65px 7vw;display:flex;align-items:center;justify-content:space-between;gap:24px;border-top:1px solid var(--line)}.future h2{font-size:36px}.future small{letter-spacing:0}.primary{font-size:16px}a:focus-visible,button:focus-visible{outline:3px solid #116d58;outline-offset:4px}
@media(max-width:1000px){header{height:auto;min-height:76px;flex-wrap:wrap;padding:15px 4vw;gap:10px}nav{display:flex;width:100%;gap:15px}.hero{grid-template-columns:1fr;gap:30px}.published-challenge{grid-template-columns:1fr}.live-preview iframe{height:420px}.future{align-items:flex-start;flex-direction:column}}
@media(max-width:520px){.hero{padding:35px 20px}.hero h1{font-size:40px}.live-preview iframe{height:350px}.published-challenge{padding:55px 20px}.real-record{padding:16px;gap:16px}.real-record h3{font-size:19px}.real-record p{font-size:14px}.record-date{font-size:25px}.future{padding:45px 20px}.actions{gap:16px}.preview-title{padding:12px}}