/* Keep Korean words intact in compact layouts. */
.hero h2{word-break:keep-all}
@media(max-width:500px){.hero h2{font-size:22px;letter-spacing:-1px}}
:root{--ink:#243e37;--muted:#7a8983;--green:#256a54;--green-dark:#184b3c;--line:#e2e8e2;--paper:#fafbf8;--cream:#eff3e9;--accent:#e3a880;--white:#fff;--radius:14px}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'Pretendard','Noto Sans CJK KR','Noto Sans KR',-apple-system,BlinkMacSystemFont,'Malgun Gothic',sans-serif;font-size:14px;line-height:1.65}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #96c9aa;outline-offset:3px}[hidden],[x-cloak]{display:none!important}h1,h2,h3,p{margin-top:0}h1{font-size:31px;letter-spacing:-1.4px;line-height:1.4;font-weight:700;margin-bottom:12px}h2{font-size:20px;letter-spacing:-.6px;margin-bottom:12px}h3{font-size:16px;margin-bottom:8px}.app-shell{display:flex;min-height:100vh}.sidebar{position:fixed;width:238px;top:0;bottom:0;background:#fff;border-right:1px solid var(--line);padding:34px 23px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:9px;font-size:24px;font-weight:750;letter-spacing:-1px}.brand-icon{position:relative;width:35px;height:36px;border-radius:10px;background:var(--green);color:#fff;text-align:center;font:italic 29px Georgia}.brand-icon span{font-size:16px;position:absolute;right:4px;top:0}.beta{font-size:8px;background:#eff4eb;color:#667e64;letter-spacing:1px;padding:3px 5px;border-radius:4px;margin-top:4px}.nav-caption{font-size:10px;font-weight:650;color:#9aa69c;letter-spacing:1.2px;margin:45px 12px 16px}nav a{display:flex;gap:14px;align-items:center;padding:12px 14px;margin:4px 0;border-radius:9px;font-weight:600;color:#76847e;font-size:13px}nav a span{font-size:19px;width:22px;text-align:center;color:#93a298}nav a.active{background:#eaf2eb;color:var(--green)}nav a.active span{color:var(--green)}nav a:hover{background:#f1f5ef}.nav-rule{border-top:1px solid var(--line);margin:24px 0}.sidebar-bottom{margin-top:auto;padding:35px 12px 0}.sidebar-bottom p{font-size:10px;color:#9ca89f;margin:22px 0 0;line-height:1.9}.leaf{background:#f4f6ef;padding:19px 15px;border-radius:11px;font-size:11px;color:#83927c;line-height:1.9}.leaf strong{font-weight:600;color:#657b5e}.workspace{margin-left:238px;width:calc(100% - 238px)}.topbar{height:80px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 42px;background:rgba(255,255,255,.65)}.breadcrumb{font-size:11px;color:#84948b}.breadcrumb span{margin:0 14px;color:#ccd5cf}.top-actions{display:flex;align-items:center;gap:18px;font-size:12px}.top-actions form{margin:0}.role-chip{font-size:10px;color:var(--green);background:#edf4ed;border-radius:6px;padding:3px 8px}main{max-width:1440px;margin:0 auto;padding:42px 46px 60px;min-height:calc(100vh - 140px)}footer{margin:0 46px;padding:20px 0;border-top:1px solid var(--line);font-size:11px;color:#8a968c;display:flex;justify-content:space-between}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:30px}.page-heading p:last-child{margin-bottom:0}.eyebrow{font-size:10px;letter-spacing:2px;font-weight:700;color:#749176;margin-bottom:10px}.muted{color:var(--muted);font-size:13px}.date-pill{font-size:11px;border:1px solid var(--line);border-radius:30px;padding:9px 14px;background:#fff;white-space:nowrap}.button{display:inline-flex;align-items:center;justify-content:center;gap:16px;background:var(--green);color:#fff;border:1px solid var(--green);padding:11px 20px;border-radius:8px;font-size:12px;font-weight:600;line-height:1.6;transition:.15s}.button:hover{background:var(--green-dark)}.button.secondary{background:#fff;color:var(--green);border-color:#d6e1d8}.button.secondary:hover{background:#edf4ee}.button.cream{background:#eff1d9;color:#244f3a;border-color:#eff1d9;margin-top:12px}.button.small{padding:6px 15px}.button.full{width:100%;margin:8px 0}.text-button{background:none;border:none;color:#788b80;font-size:12px;padding:4px}.text-button:hover{color:var(--green)}.hero{border-radius:var(--radius);background:#255a48;color:#fff;position:relative;overflow:hidden;min-height:323px;padding:39px 40px;display:flex;justify-content:space-between}.hero-label{display:inline-block;border:1px solid #5b816d;border-radius:30px;font-size:10px;padding:4px 10px;color:#d8e7ce;letter-spacing:.5px}.hero h2{font-size:30px;line-height:1.5;letter-spacing:-1.3px;margin:17px 0 13px;font-weight:600}.hero p{font-size:12px;line-height:1.9;color:#bdcfc3}.hero-art{width:40%;display:flex;align-items:center;justify-content:center;position:relative}.art-card{background:#f7f8ee;width:244px;height:252px;transform:rotate(7deg);border-radius:12px;box-shadow:0 12px 35px #153f3650;color:var(--ink);padding:21px 24px;z-index:1}.art-card>span{font-size:7px;letter-spacing:1.5px;color:#8a9b86}.equation{font-size:18px;text-align:center;margin:16px 0 0}.art-card svg{width:100%;height:128px}.art-card .art-note{font-size:8px;display:block;text-align:center;letter-spacing:.3px}.orbit{position:absolute;border:1px solid #7a9d7730;border-radius:50%;width:365px;height:365px;transform:rotate(-30deg)}.orbit.two{width:290px;height:420px;transform:rotate(35deg)}.floating-tag{position:absolute;z-index:2;bottom:2px;left:-15px;background:#d7e4ce;color:#41654e;font-size:10px;padding:11px 18px;transform:rotate(-5deg);border-radius:8px;box-shadow:0 8px 20px #17443633}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:24px 0 37px}.stat{border:1px solid var(--line);border-radius:12px;background:#fff;display:flex;align-items:center;gap:20px;padding:22px 25px}.stat p{font-size:11px;color:#849186;margin-bottom:4px}.stat strong{font-size:25px;font-weight:650;letter-spacing:-.7px}.stat small{font-size:10px;font-weight:400;color:#9aa69b;margin-left:8px;letter-spacing:0}.stat-icon{border-radius:12px;display:grid;place-items:center;width:45px;height:45px;font-size:22px;background:#edf3e8;color:#80966c}.stat-icon.peach{background:#fbefe5;color:#ca9e7c}.stat-icon.lilac{background:#f0edf6;color:#aa9eb8}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:30px 0 18px}.section-heading h2{margin:0;font-size:18px}.section-heading>a{font-size:11px;color:#859786}.section-heading .muted{font-size:11px}.action-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.action-card{background:white;border:1px solid var(--line);padding:25px;border-radius:12px;transition:.2s}.action-card:hover,.concept-card:hover{border-color:#a0b7a0;transform:translateY(-2px)}.action-icon{color:#648972;background:#eff5ed;width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-size:22px;margin-bottom:22px}.action-icon.orange{background:#fcf0e6;color:#c3906b}.action-icon.blue{background:#edf1f4;color:#879eaa}.action-card h3{font-size:14px;display:flex;justify-content:space-between}.action-card h3 span{color:#b9c5b8}.action-card p{font-size:11px;line-height:1.9;color:#8c998f;margin:12px 0 25px}.card-link{font-size:10px;color:#748e73;border-bottom:1px solid #d5dfd0;padding-bottom:3px}.panel{padding:24px;background:#fff;border:1px solid var(--line);border-radius:12px}.list-row{display:flex;align-items:center;justify-content:space-between;padding:16px 4px;gap:20px;border-bottom:1px solid #edf0e9;font-size:13px}.list-row:last-child{border:0}.list-row p{margin:4px 0 0}.notice{padding:16px 20px;border-radius:10px;background:#fff1df;color:#866332;margin:18px 0;border:1px solid #f0dfc2;font-size:12px}.notice.subtle{background:#f1f5ec;border-color:#e0e8d9;color:#7a8d6e;margin-top:30px}.bank-layout{display:grid;grid-template-columns:220px 1fr;gap:25px;align-items:start}.filter-panel{border:1px solid var(--line);background:#fff;border-radius:12px;padding:23px;position:sticky;top:20px}.filter-panel h3{padding-bottom:15px;border-bottom:1px solid var(--line)}label{display:block;font-size:12px;font-weight:600;margin:15px 0;color:#5e7568}input:not([type=checkbox]):not([type=radio]),select,textarea{width:100%;border:1px solid #dfe6dd;background:#fff;border-radius:7px;padding:10px 12px;color:var(--ink);font-size:12px;margin-top:6px}select{min-width:0;text-overflow:ellipsis}input[type=checkbox],input[type=radio]{accent-color:var(--green)}.filter-note{background:#f3f6ef;color:#8a9a80;font-size:10px;line-height:1.8;padding:13px;border-radius:8px;margin-top:22px}.results-heading{display:flex;justify-content:space-between;font-size:12px;margin-bottom:16px}.results-heading .muted{font-size:11px}.question-card{border:1px solid var(--line);border-radius:12px;background:#fff;padding:24px 27px;margin-bottom:16px}.question-top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:19px;font-size:11px}.tag{font-size:10px;background:#edf3eb;color:#668365;padding:4px 8px;border-radius:5px;display:inline-block}.tag.plain{background:transparent;color:#81927e}.difficulty{font-size:9px;border:1px solid #e8ddcb;color:#b39570;padding:3px 7px;border-radius:4px;margin-left:8px}.select-control{display:flex;align-items:center;gap:5px;margin:0;font-size:11px;white-space:nowrap}.question-text{font-size:15px;line-height:2;word-break:keep-all}.choices{display:flex;flex-wrap:wrap;list-style:none;padding:0;gap:16px 28px;margin:23px 0 1px}.choices li{display:flex;gap:9px;align-items:center;font-size:13px}.choice-number{font-size:10px;border:1px solid #a0aaa1;border-radius:50%;width:17px;height:17px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.diagram{max-width:300px;margin:10px auto}.diagram svg{width:100%;max-height:220px}.empty-state{text-align:center;padding:65px 30px;background:#fff;border:1px dashed #d6e1d4;border-radius:12px;grid-column:1/-1}.empty-state>span{font-size:35px;color:#a5b99e}.empty-state h3{margin:13px 0;font-size:17px}.empty-state p{color:#899b86;font-size:12px}.selection-bar{display:flex;align-items:center;gap:20px;position:sticky;bottom:18px;background:#fff;box-shadow:0 4px 25px #253b3215;border:1px solid #d7e3d2;border-radius:12px;margin:25px 0 0;padding:15px 23px;font-size:12px}.selection-bar input:not([type=checkbox]){max-width:260px;margin:0 auto 0 0}.selection-bar b{color:var(--green)}.pagination{display:flex;justify-content:center;gap:30px;margin:25px 0;font-size:12px}.sheet-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.sheet-card{background:#fff;border:1px solid var(--line);padding:17px;border-radius:12px}.paper-preview{background:#f1f3eb;border-radius:8px;height:180px;padding:28px 35px;position:relative;color:#779270}.paper-preview>span{font-size:8px;letter-spacing:1px}.paper-preview i{display:block;height:3px;background:#d5dece;margin-top:16px;width:75%}.paper-preview i:nth-of-type(2){width:90%}.paper-preview>div{position:absolute;bottom:15px;right:30px;font-size:26px}.sheet-card h3{margin:18px 0 8px}.sheet-card p{font-size:11px;color:#98a38f;margin:0}.sheet-card p span{float:right;color:#6f8b64}.editor-layout,.attempt-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:26px;align-items:start}.editor-tools{position:sticky;top:20px}.editor-tools p{font-size:11px}.title-input{margin:0 0 25px}.drag-handle{cursor:grab}.form-card{max-width:470px;background:white;border:1px solid var(--line);border-radius:15px;padding:40px;margin:45px auto}.form-card h1{font-size:25px}.form-card p{font-size:12px}.form-card .helptext{font-size:10px;color:#879481;display:block;margin-top:5px}.form-card ul{font-size:10px;color:#8a9686;padding-left:18px}.form-card .errorlist{color:#b55639}.form-links{display:flex;justify-content:space-between;font-size:11px;margin-top:22px;color:#758e70}.form-links a:hover{text-decoration:underline}.recovery-key{display:block;overflow-wrap:anywhere;background:#edf4e9;padding:20px;margin:25px 0;border-radius:8px;font-size:16px}.class-card{display:flex;gap:22px;align-items:center;background:#fff;border:1px solid var(--line);padding:25px;border-radius:12px;margin-bottom:15px}.class-card>span:last-child{margin-left:auto}.class-avatar{background:#eaf1e6;color:#7f9673;width:50px;height:50px;display:grid;place-items:center;border-radius:12px;font-size:24px}.class-card p{margin:0}.invite-panel{background:#ecf2e6;border:1px solid #dce6d4;border-radius:12px;padding:25px;display:flex;align-items:center;gap:40px}.invite-panel p{font-size:11px;color:#819676;margin:0}.invite-panel strong{font-size:26px;letter-spacing:4px;font-weight:500}.invite-panel form{margin-left:auto}.space-top{margin-top:25px}table{width:100%;border-collapse:collapse;font-size:12px}th{text-align:left;font-size:10px;color:#8b9883;font-weight:500;padding:10px;border-bottom:1px solid var(--line)}td{padding:16px 10px;border-bottom:1px solid #edf1e8}.table-scroll{overflow-x:auto}.concept-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.concept-card{border:1px solid var(--line);border-radius:10px;padding:22px;background:#fff;transition:.15s}.concept-card h3{font-size:14px;margin-top:8px}.concept-card p{font-size:11px;color:#8e9b86}.prereqs{display:flex;gap:5px;flex-wrap:wrap}.prereqs span{background:#f4f6f0;font-size:9px;border-radius:4px;padding:3px 6px;color:#8a9881}.tag-list{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}.answer-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.answer-grid a{font-size:11px;border:1px solid var(--line);text-align:center;padding:7px 0;border-radius:6px}.answer-grid a.answered{background:#e4efdf;border-color:#a4b99a;color:#4a7645}.answer-option{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin:9px 0;cursor:pointer}.answer-option.selected{border-color:#82a678;background:#f0f6ed}.answer-option.correct{border-color:#6d9c62;background:#edf6e8}.solution{margin-top:20px;padding:18px;background:#f3f6ef;border-radius:8px;font-size:12px}.solution p{margin:4px 0}.score{font-size:30px!important;margin-top:22px;color:var(--green)}.score span{font-size:15px;color:#93a187}dialog{border:1px solid var(--line);border-radius:15px;padding:30px;max-width:440px;width:90%;color:var(--ink)}dialog::backdrop{background:#1c332b66}#toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);background:#244a3a;color:white;padding:15px 24px;border-radius:10px;box-shadow:0 4px 20px #20342533;z-index:1000;font-size:12px}.htmx-request{opacity:.65}.katex{font-size:1.12em}.katex-display{overflow-x:auto;overflow-y:hidden}.solution .katex{font-size:1em}
@media(min-width:1600px){main{padding-top:55px}.hero{min-height:350px}.hero h2{font-size:34px}}@media(max-width:1150px){.sidebar{width:200px;padding:28px 15px}.brand{font-size:21px}.workspace{margin-left:200px;width:calc(100% - 200px)}main{padding:30px 28px}.topbar{padding:0 28px}.hero{padding:32px 28px}.hero h2{font-size:26px}.art-card{width:210px}.stat{padding:20px 17px;gap:13px}.stat-icon{width:35px;height:35px}.action-card{padding:20px}.editor-layout,.attempt-layout{grid-template-columns:minmax(0,1fr) 250px}.bank-layout{grid-template-columns:195px 1fr;gap:18px}.selection-bar{gap:10px}.concept-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:850px){.sidebar{width:75px;padding:23px 12px}.brand{font-size:0;justify-content:center}.brand .beta,.nav-caption,.sidebar-bottom{display:none}.brand-icon{font-size:29px}nav{margin-top:30px}nav a{font-size:0;justify-content:center;padding:10px;gap:0}nav a span{font-size:23px}.workspace{margin-left:75px;width:calc(100% - 75px)}.hero-art{display:none}.hero{min-height:auto}.hero>div{width:100%}.action-grid,.sheet-grid{grid-template-columns:1fr}.action-card p br{display:none}.action-card .action-icon{margin-bottom:15px}.action-card p{margin-bottom:15px}.stat-grid{gap:10px}.stat-icon{display:none}.stat{padding:15px}.stat strong{font-size:22px}.stat small{display:block;margin:0}.bank-layout{grid-template-columns:1fr}.filter-panel{position:static}.filter-panel form{display:grid;grid-template-columns:repeat(2,1fr);gap:0 15px}.filter-note{display:none}.editor-layout,.attempt-layout{grid-template-columns:1fr}.editor-tools{position:static}.selection-bar{flex-wrap:wrap}.selection-bar input:not([type=checkbox]){max-width:100%;flex:1}.invite-panel{flex-wrap:wrap;gap:20px}.invite-panel form{margin-left:0}.breadcrumb{display:none}.topbar{justify-content:flex-end;height:64px}.date-pill{display:none}}@media(max-width:500px){main{padding:26px 17px}.workspace{margin-left:58px;width:calc(100% - 58px)}.sidebar{width:58px;padding:23px 6px}.brand-icon{width:32px;height:33px}h1{font-size:25px}.page-heading{align-items:flex-start;flex-direction:column;gap:15px}.hero{padding:25px}.hero h2{font-size:25px}.stat-grid{grid-template-columns:1fr}.stat{gap:20px;padding:14px 20px}.stat-icon{display:grid}.stat strong{font-size:22px}.stat small{display:inline;margin-left:10px}.stat-grid{margin-bottom:25px}.concept-grid{grid-template-columns:1fr}.section-heading .muted{display:none}.top-actions{gap:9px}.topbar{padding:0 14px}.form-card{padding:25px;margin:20px 0}.question-card{padding:20px 17px}.question-top{align-items:flex-start}.tag.plain{max-width:130px}.difficulty{display:none}.choices{gap:18px}.selection-bar{padding:14px;bottom:5px}.selection-bar input:not([type=checkbox]){flex-basis:100%}.question-text{font-size:14px}footer{margin:0 20px}footer span{display:none}.table-scroll{padding:10px}td{padding:12px 8px}}