@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800;900&display=swap');
:root{--ink:#193c32;--green:#286a50;--paper:#f8f9f4;--muted:#68776e;--line:#dce3d9;--lime:#d7ed91}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--paper);color:var(--ink);font-family:'Noto Sans KR',sans-serif;font-size:15px;line-height:1.7}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #a3bf4b;outline-offset:4px}header{max-width:1280px;margin:auto;height:106px;display:flex;align-items:center;justify-content:space-between;padding:0 48px}.brand{display:flex;align-items:center;gap:12px;font-weight:900;font-size:23px;letter-spacing:-1px}.brand-mark{background:var(--green);color:#fff;display:grid;place-items:center;width:38px;height:38px;border-radius:12px;font-family:Georgia,serif;font-size:32px;font-weight:bold;padding-bottom:9px}.brand-sub{font-size:11px;letter-spacing:0;color:var(--muted);font-weight:400;margin-left:13px}nav{display:flex;gap:30px;font-size:13px;font-weight:600}main{max-width:1280px;margin:auto;padding:0 48px}.hero{min-height:540px;display:grid;grid-template-columns:1.1fr 1fr;align-items:center;gap:30px;padding:38px 0 65px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:2px;display:flex;align-items:center;gap:9px}.eyebrow>span{width:7px;height:7px;background:var(--green);border-radius:50%}h1{font-size:clamp(36px,4.1vw,58px);line-height:1.3;letter-spacing:-3px;margin:23px 0}p{color:var(--muted)}.hero p{font-size:17px;line-height:1.9}.hero strong{color:var(--ink);font-weight:600}.button{display:inline-flex;justify-content:space-between;align-items:center;gap:32px;padding:14px 23px;border-radius:9px;font-weight:600;font-size:14px}.primary{background:var(--green);color:white}.primary:hover{background:#174c38}.hero .button{margin-top:18px}.hero-note{font-size:11px;color:var(--muted);margin-top:22px}.science-art{position:relative;min-height:425px;background:#e8eedc;border-radius:130px 28px 28px 28px;overflow:hidden;background-image:radial-gradient(#b9cbb866 1px,transparent 1px);background-size:20px 20px}.orbit{position:absolute;border:1px solid #b9c9a5;border-radius:50%;width:330px;height:330px;left:16%;top:35px;transform:rotate(-30deg) scaleX(.65)}.orbit-two{transform:rotate(35deg) scaleX(.65);width:390px;height:390px;top:5px;left:10%}.art-label{position:absolute;font-size:9px;letter-spacing:2.3px;color:#58734b}.top-label{top:31px;right:26px}.bottom-label{bottom:21px;left:28px}.dna{position:absolute;left:26%;top:60px;width:50%;height:290px;transform:rotate(27deg)}.rung{position:absolute;left:50%;height:8px;display:flex;border-radius:5px;transform:translateX(-50%);box-shadow:0 2px 3px #193c321a}.rung i{height:100%;width:50%;background:#3d785a}.rung i+ i{background:#b8d264}.rung::before,.rung::after{content:'';position:absolute;top:-3px;width:15px;height:15px;background:#1d533d;border-radius:50%;left:-6px}.rung::after{left:auto;right:-6px;background:#a1bc57}.art-card{position:absolute;bottom:45px;right:23px;display:grid;gap:6px;background:#ffffffe8;backdrop-filter:blur(6px);padding:18px 22px;border:1px solid #fff;border-radius:12px;transform:rotate(-5deg);box-shadow:0 9px 30px #193c3210}.art-card span{font-size:8px;color:var(--muted);letter-spacing:1.6px}.art-card b{font-size:14px}.art-card small{font-family:monospace;color:var(--green)}.classroom{padding:52px 0 66px;border-top:1px solid var(--line)}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:24px}h2{font-size:29px;line-height:1.45;letter-spacing:-1.4px;margin:13px 0 10px}.section-heading p{margin:0;font-size:13px}.year-label{font-size:11px;display:grid;gap:5px;color:var(--muted)}select{padding:9px 30px 9px 13px;background:white;border:1px solid var(--line);border-radius:7px;color:var(--ink);font-size:13px}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:30px}.filters{display:flex;gap:5px}.filters button{border:0;background:transparent;color:var(--muted);border-radius:7px;padding:9px 17px;font-size:12px}.filters .active{background:var(--ink);color:white}.search{display:flex;gap:10px;align-items:center;padding:8px 13px;background:white;border:1px solid var(--line);border-radius:7px}.search input{border:0;outline:0;background:none;width:160px;font-size:12px;color:var(--ink)}.result-count{font-size:11px;margin:18px 0 13px}.lesson-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.lesson{border:1px solid var(--line);background:white;border-radius:13px;overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}.lesson:hover{transform:translateY(-4px);box-shadow:0 10px 24px #193c320c}.tile-art{height:135px;position:relative;display:grid;place-items:center;background:var(--tile);overflow:hidden}.tile-art::before{content:'';width:125px;height:125px;border:1px solid #193c321a;border-radius:50%;position:absolute}.tile-symbol{font-family:Georgia,serif;font-size:55px;line-height:1;font-weight:400;z-index:1}.week-pill{position:absolute;top:13px;left:13px;background:#ffffffd9;border-radius:5px;padding:3px 8px;font-size:10px;font-weight:600}.tile-tag{position:absolute;bottom:10px;right:12px;font-size:8px;letter-spacing:2px;opacity:.6}.tile-copy{padding:18px 17px;display:flex;flex-direction:column;flex:1}.tile-copy small{color:var(--green);font-size:10px;font-weight:500}.tile-copy h3{font-size:16px;letter-spacing:-.6px;margin:7px 0;line-height:1.5}.tile-copy p{font-size:11px;line-height:1.8;margin:0 0 17px;flex:1}.tile-action{display:flex;justify-content:space-between;gap:8px;align-items:center;padding-top:12px;border-top:1px solid #edf0e9}.tile-action button{background:none;border:0;padding:0;color:var(--ink);font-size:11px;font-weight:600}.tile-action a{font-size:11px;font-weight:700;color:var(--green)}.guide{padding:48px 0 65px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1.5fr;gap:50px}.guide ol{list-style:none;padding:0;margin:0;display:grid;gap:22px}.guide li{display:flex;gap:20px}.guide li>span{font-family:Georgia,serif;color:#79976d;font-size:22px}.guide h3{font-size:14px;margin:0 0 5px}.guide p{font-size:12px;margin:0}footer{max-width:1184px;margin:auto;border-top:1px solid var(--line);padding:26px 0;display:flex;align-items:center;justify-content:space-between;gap:20px}footer .brand{font-size:18px}footer p,footer>span{font-size:10px;color:var(--muted)}.small{width:25px;height:25px;font-size:23px;border-radius:8px;padding-bottom:7px}dialog{border:1px solid var(--line);border-radius:18px;max-width:620px;width:calc(100% - 32px);padding:38px;color:var(--ink);background:var(--paper)}dialog::backdrop{background:#102f27aa;backdrop-filter:blur(3px)}.close{position:absolute;top:10px;right:14px;background:none;border:0;font-size:28px;color:var(--muted)}dialog p,dialog li{font-size:14px}.detail-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.lesson-nav{display:flex;justify-content:space-between;margin-top:30px;padding-top:20px;border-top:1px solid var(--line)}.lesson-nav button{border:0;background:none;color:var(--green);padding:8px}.lesson-nav button:disabled{opacity:.3;cursor:default}.note{padding:14px;background:#eaf0e2;border-radius:8px;font-size:12px}.pending{opacity:.75}@media(max-width:1000px){.lesson-grid{grid-template-columns:repeat(3,1fr)}.brand-sub{display:none}footer{margin:0 48px}.hero{gap:20px}.science-art{min-height:380px}.dna{left:21%;width:60%}}@media(max-width:720px){header{padding:0 22px;height:80px}nav{gap:17px;font-size:11px}main{padding:0 22px}.hero{grid-template-columns:1fr;padding:28px 0 38px;gap:30px}h1{font-size:43px}.hero p{font-size:15px}.science-art{min-height:310px;border-radius:70px 20px 20px 20px}.dna{top:20px;left:30%;width:40%;height:260px}.art-card{bottom:30px}.lesson-grid{grid-template-columns:repeat(2,1fr);gap:12px}.section-heading{align-items:flex-start}h2{font-size:23px}.section-heading p{font-size:12px}.year-label{flex-shrink:0}select{font-size:11px;padding:8px}.toolbar{align-items:stretch;flex-direction:column}.search input{width:100%}.search{width:100%}.filters button{padding:8px 13px}.tile-copy{padding:13px}.tile-copy h3{font-size:14px}.tile-art{height:115px}.tile-symbol{font-size:45px}.tile-action{flex-wrap:wrap}.guide{grid-template-columns:1fr;gap:20px}footer{margin:0 22px;flex-wrap:wrap}footer p{display:none}dialog{padding:30px 23px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.material-link{display:inline-block;padding:12px 16px;border:1px solid #b7cbb7;border-radius:8px;margin:0 10px 10px 0;color:#224f39}#detail h3{margin:26px 0 10px}#detail{width:min(800px,94vw)}