@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Noto+Sans+KR:wght@400;500;600&display=swap');
:root{font-family:'DM Sans','Noto Sans KR',sans-serif;color:#25372e;background:#f5f7f4;font-synthesis:none;--ink:#24392f;--muted:#738078;--line:#e3e8e1;--sage:#e5eee6}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{cursor:pointer;border:0;color:inherit;background:none}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #789e89;outline-offset:3px}button:hover{filter:brightness(.97)}button:disabled{opacity:.45;cursor:default}a{color:inherit}.app{display:flex;min-height:100vh}.sidebar{width:245px;flex-shrink:0;padding:30px 20px;background:#eef2ec;border-right:1px solid #e2e7df;display:flex;flex-direction:column;position:fixed;inset:0 auto 0 0;z-index:20}.brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:650;padding:0 6px;white-space:nowrap}.orb{display:inline-flex;align-items:center;justify-content:center;background:radial-gradient(circle at 30% 20%,#eef8ed 0,#b6d1bf 50%,#62846c 100%);border-radius:50%;width:36px;height:36px;color:#fff;box-shadow:0 4px 15px #71957b20;font-size:24px}.nav-home{display:flex;gap:12px;align-items:center;padding:12px 14px;margin-top:42px;border-radius:12px;font-size:14px;text-align:left}.nav-home.active{background:#fff;box-shadow:0 2px 5px #263c2e04}.sidebar-label{display:flex;align-items:center;justify-content:space-between;font-size:10px;letter-spacing:1.8px;color:#7a877c;margin:34px 12px 12px;font-weight:650}.class-nav{display:flex;align-items:center;gap:10px;padding:12px 10px;border-radius:12px;text-align:left;font-size:12px;line-height:1.4;width:100%;margin-bottom:5px}.class-nav.active{background:#fff}.folder-icon{width:32px;height:32px;border-radius:10px;background:#dec9bf;display:grid;place-items:center;flex-shrink:0;color:#644f45}.folder-icon.lavender{background:#dfd4e8;color:#796985}.folder-icon.green{background:#d2dfcf;color:#65775e}.count{margin-left:auto;font-size:11px;color:#92998f}.profile{display:flex;align-items:center;gap:10px;margin-top:auto;padding:16px 8px 0;border-top:1px solid #dce3d9;font-size:12px}.avatar{width:33px;height:33px;border-radius:50%;background:#dfd7cb;display:grid;place-items:center;font-weight:600}.profile small{display:block;color:var(--muted);font-size:10px;margin-top:2px}.main{margin-left:245px;flex:1;min-width:0}.topbar{height:80px;display:flex;align-items:center;justify-content:space-between;padding:0 44px;border-bottom:1px solid #e9ece5;font-size:12px;color:var(--muted)}.crumb{display:flex;gap:12px;align-items:center}.crumb strong{font-weight:500;color:var(--ink)}.top-right{display:flex;align-items:center;gap:10px}.language{padding:7px 11px;background:#fff;border:1px solid var(--line);border-radius:20px;font-size:10px}.home{min-height:calc(100vh - 80px);position:relative;overflow:hidden;display:flex;flex-direction:column;align-items:center;padding:92px 35px 24px;background:radial-gradient(ellipse at 50% 36%,#dbe9da80,transparent 48%),radial-gradient(ellipse at 80% 10%,#e6deea40,transparent 45%)}.home-center{text-align:center;z-index:1}.hero-orb{width:78px;height:78px;font-size:45px;box-shadow:0 10px 50px #71977a25;margin-bottom:28px}.eyebrow{font-size:10px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:#7c8c7c;margin:0 0 16px}.home h1{font-size:clamp(30px,3.2vw,46px);letter-spacing:-1.8px;line-height:1.16;font-weight:500;margin:0 0 17px}.subtext{font-size:14px;line-height:1.7;color:var(--muted);margin:0}.primary{display:inline-flex;align-items:center;justify-content:center;gap:12px;border-radius:99px;background:#263d30;color:#fff;padding:15px 25px;font-size:13px;font-weight:500;box-shadow:0 4px 10px #1c33230a}.start{margin-top:32px;min-width:214px;padding:17px 27px}.folder-picker{display:flex;justify-content:center;align-items:center;gap:8px;margin:18px 0 0;color:#768273;font-size:11px}.folder-picker select{border:0;background:transparent;color:#3e5141;max-width:215px;font-size:11px;cursor:pointer}.recent{max-width:750px;width:100%;margin-top:72px;z-index:1}.section-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px}.section-heading h2{font-size:13px;font-weight:550;margin:0}.section-heading span{font-size:11px;color:var(--muted)}.recent-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.lecture-card{text-align:left;background:#ffffffc9;border:1px solid #fff;border-radius:19px;padding:19px;min-height:144px;box-shadow:0 7px 24px #283a2c03;transition:transform .2s}.lecture-card:hover{transform:translateY(-3px)}.card-meta{font-size:9px;color:#7d877b;margin:13px 0 8px}.lecture-card h3{font-size:13px;font-weight:550;line-height:1.4;margin:0 0 13px}.card-foot{font-size:10px;color:#879080;display:flex;justify-content:space-between}.home-footer{font-size:10px;color:#929c90;margin-top:auto;padding-top:40px}.icon{display:inline-flex;vertical-align:middle;align-items:center;justify-content:center}.icon svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.btn-light{border:1px solid var(--line);background:#fff;border-radius:22px;padding:9px 14px;font-size:11px;display:inline-flex;align-items:center;gap:7px}.icon-button{width:36px;height:36px;display:inline-grid;place-items:center;border-radius:50%;background:#fff;border:1px solid var(--line)}.mobile-menu{display:none}.workspace{padding:27px 30px 20px;height:calc(100vh - 80px);display:flex;flex-direction:column}.session-head{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:25px}.session-head h1{font-size:23px;letter-spacing:-.65px;margin:4px 0 8px;font-weight:550}.session-head .eyebrow{font-size:9px;margin-bottom:8px;letter-spacing:1.4px}.session-sub{font-size:11px;color:var(--muted)}.status{display:inline-flex;align-items:center;gap:6px;font-size:10px;background:#e5eee4;color:#527553;padding:5px 9px;border-radius:20px}.status i{width:5px;height:5px;background:#65976c;border-radius:50%}.session-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.session-actions .primary{padding:11px 17px;font-size:11px}.split{display:grid;grid-template-columns:1.05fr 1fr;gap:20px;min-height:0;flex:1}.panel{border:1px solid #e3e8df;border-radius:23px;background:#fff;display:flex;flex-direction:column;overflow:hidden;min-height:0}.panel-head{padding:19px 22px;border-bottom:1px solid #edf0e8;display:flex;align-items:center;justify-content:space-between;gap:8px}.panel-title{font-size:13px;font-weight:600;display:flex;align-items:center;gap:9px}.panel-title .orb{width:25px;height:25px;font-size:17px}.panel-head small{font-size:9px;color:var(--muted)}.feed{overflow:auto;padding:10px 22px 22px;flex:1;scroll-behavior:smooth}.segment{padding:18px 0;border-bottom:1px solid #edf0e8;animation:appear .35s}.timestamp{font-size:9px;letter-spacing:.6px;color:#8c998a;margin-bottom:9px;display:flex;align-items:center;gap:9px}.segment .ko{font-size:14px;line-height:1.9;margin:0 0 9px;font-weight:500}.segment .en{font-size:12px;line-height:1.8;color:#7e877b;margin:0}.segment:last-child .timestamp{color:#4f805b}.segment.highlight{background:#eaf0e6;border-radius:12px;padding:15px}.panel-foot{padding:12px 20px;border-top:1px solid #edf0e8;font-size:10px;color:#80907e;display:flex;justify-content:space-between;align-items:center;background:#fcfdfb}.wave{letter-spacing:2px;color:#709673}.messages{overflow:auto;padding:20px;flex:1;scroll-behavior:smooth}.chat-welcome{padding:30px 14px;text-align:center}.chat-welcome .orb{width:48px;height:48px;font-size:29px;margin-bottom:16px}.chat-welcome h3{font-size:16px;font-weight:500;margin:0 0 10px}.chat-welcome p{font-size:12px;color:var(--muted);line-height:1.8}.user-msg{background:#283e33;color:white;margin:15px 0 16px 32px;border-radius:17px 17px 4px 17px;padding:14px 16px;font-size:12px;line-height:1.7}.ai-msg{background:#f2f6f0;border:1px solid #e5ece1;border-radius:17px 17px 17px 4px;padding:17px;font-size:12px;line-height:1.8;margin:0 15px 18px 0;animation:appear .25s}.ai-msg h3{font-size:13px;margin:0 0 10px;line-height:1.6}.ai-msg p{margin:8px 0;color:#637360}.sources{display:flex;gap:6px;flex-wrap:wrap;margin-top:13px;border-top:1px solid 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h1{font-size:33px;letter-spacing:-1px;font-weight:500;margin:10px 0}.recap-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:18px}.recap-card{background:#fff;border:1px solid var(--line);border-radius:23px;padding:25px}.recap-card h2{font-size:15px;font-weight:600;display:flex;gap:10px;align-items:center;margin:0 0 20px}.recap-card p,.recap-card li{font-size:12px;line-height:1.9;color:#65735e}.recap-card ul{padding-left:17px}.recap-card li{margin-bottom:12px}.recap-card.peach{background:#f3e6dd;border-color:#efdfd3}.recap-card.lavender{background:#eee9f1;border-color:#e6dfea}.terms{display:grid;gap:17px}.term strong{font-size:13px;font-weight:500}.term span{display:block;font-size:11px;margin-top:4px;color:#7c7383}.deadline{display:flex;justify-content:space-between;gap:10px;background:#ffffff80;border-radius:12px;padding:12px;font-size:10px;margin-top:18px}.recap-bottom{display:flex;justify-content:space-between;margin-top:25px}.class-page{padding:42px;max-width:1100px}.class-page h1{font-size:30px;font-weight:500;letter-spacing:-1px}.class-list{margin-top:30px;display:grid;gap:12px}.lecture-row{display:flex;text-align:left;align-items:center;gap:15px;background:white;border:1px solid var(--line);padding:20px;border-radius:18px;width:100%}.lecture-row strong{display:block;font-size:13px;font-weight:550}.lecture-row small{display:block;font-size:10px;color:var(--muted);margin-top:7px}.lecture-row .arrow{margin-left:auto;color:var(--muted)}.scrim{position:fixed;inset:0;background:#17271f40;backdrop-filter:blur(4px);z-index:60;display:flex;justify-content:flex-end}.drawer{width:min(640px,100%);height:100%;background:#f8faf6;padding:28px;display:flex;flex-direction:column;border-radius:28px 0 0 28px;box-shadow:-10px 0 50px #14291c15;animation:slide .2s}.drawer-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.drawer-head h2{font-size:14px;margin:0 0 5px}.drawer-head p{font-size:10px;color:var(--muted);margin:0}.slide{background:#fff;border:1px solid var(--line);border-radius:18px;flex:1;margin:28px 0;padding:36px;overflow:auto;box-shadow:0 6px 25px #273d2905}.slide h2{font-size:28px;line-height:1.25;font-weight:500;letter-spacing:-.8px;margin-top:30px}.slide p,.slide li{font-size:14px;line-height:1.9;color:#62715e}.slide .slide-ko{font-size:17px;color:#8b9885;margin-top:-8px}.slide mark{background:#e3eedb;color:#36532b;padding:3px 5px}.slide-callout{background:#eff4eb;border-radius:16px;padding:20px;margin-top:28px;font-size:12px;line-height:1.9}.drawer-nav{display:flex;justify-content:space-between;align-items:center;font-size:11px}.modal-wrap{position:fixed;inset:0;z-index:65;background:#23392d40;backdrop-filter:blur(4px);display:grid;place-items:center;padding:20px}.modal{background:#fff;padding:30px;border-radius:24px;width:min(420px,100%)}.modal h2{font-size:21px;font-weight:500}.modal p{font-size:13px;color:var(--muted);line-height:1.7}.modal input{width:100%;padding:12px;border:1px solid var(--line);border-radius:12px;margin:12px 0 20px}.modal-actions{display:flex;justify-content:flex-end;gap:9px}.empty{padding:30px;color:var(--muted);font-size:13px;text-align:center}.hidden{display:none!important}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);z-index:80;background:#263d30;color:white;border-radius:20px;padding:12px 20px;font-size:12px}.material-row{margin-top:22px;background:#f0f5eb;border-radius:14px;padding:17px;display:flex;align-items:center;gap:10px}.material-row strong{display:block;font-size:12px}.material-row small{font-size:10px;color:var(--muted)}.material-row button{margin-left:auto}.mobile-close{display:none}@keyframes appear{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@keyframes slide{from{transform:translateX(40px);opacity:0}to{transform:translateX(0);opacity:1}}@media(min-width:1500px){.home{padding-top:120px}.recent{margin-top:95px}}@media(max-width:1100px){.sidebar{width:210px;padding-inline:15px}.main{margin-left:210px}.topbar{padding-inline:26px}.workspace{padding:22px 20px}.split{gap:12px}.session-head h1{font-size:20px}.session-actions{max-width:240px}.recap{padding:30px 25px}.recent{max-width:680px}.brand{font-size:14px}}@media(max-width:760px){.sidebar{transform:translateX(-100%);width:245px;transition:transform .2s;box-shadow:20px 0 60px #273d2b10}.sidebar.open{transform:translateX(0)}.mobile-close{display:block;margin-top:20px}.main{margin-left:0}.topbar{height:64px;padding:0 18px}.mobile-menu{display:inline-grid;background:transparent;border:0;margin-right:8px}.crumb{gap:5px;font-size:11px}.top-right .language{font-size:9px}.home{min-height:calc(100svh - 64px);padding:64px 23px 24px}.home h1{font-size:34px;letter-spacing:-1.2px}.hero-orb{width:66px;height:66px;font-size:37px}.subtext{font-size:12px}.recent{margin-top:56px}.recent-grid{grid-template-columns:1fr}.lecture-card{min-height:0;padding:16px 19px;display:grid;grid-template-columns:34px 1fr;column-gap:13px}.lecture-card .folder-icon{grid-row:1/4}.lecture-card .card-meta{margin:0 0 5px}.lecture-card h3{margin:0 0 8px}.lecture-card .card-foot{grid-column:2}.home-footer{font-size:9px;margin-top:25px}.workspace{padding:20px 14px 12px;height:calc(100dvh - 64px)}.session-head{align-items:flex-start;margin-bottom:15px;flex-wrap:wrap}.session-head h1{font-size:21px}.session-actions{max-width:none;width:100%;justify-content:flex-end}.session-actions .btn-light,.session-actions .primary{font-size:10px;padding:8px 12px}.split{display:block;min-height:0}.panel{height:100%}.panel.mobile-hidden{display:none}.mobile-tabs{display:flex;gap:4px;padding:4px;background:#e9efe4;border-radius:20px;margin-bottom:12px}.mobile-tabs button{flex:1;padding:8px;font-size:11px;border-radius:16px}.mobile-tabs button.active{background:#fff;box-shadow:0 2px 6px #263a2608}.panel-head{padding:16px}.feed{padding-inline:17px}.messages{padding:16px}.recap{padding:27px 18px}.recap-heading{display:block}.recap-heading .status{margin-bottom:12px}.recap h1{font-size:28px}.recap-grid{grid-template-columns:1fr}.recap-card{padding:22px}.recap-bottom{gap:8px}.recap-bottom button{font-size:11px}.class-page{padding:30px 18px}.class-page h1{font-size:27px}.drawer{height:90dvh;align-self:flex-end;border-radius:26px 26px 0 0;padding:23px 18px}.slide{padding:23px;margin:20px 0}.slide h2{font-size:25px}.slide p,.slide li{font-size:12px}.drawer-head h2{font-size:12px}.language.hide-mobile{display:none}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* Let short viewports scroll without compressing the reading panels. */
html{overflow-y:auto;scrollbar-gutter:stable}body{overflow-x:clip}.sidebar{overflow-y:auto}.sidebar>*{flex-shrink:0}.home{overflow:visible}.workspace{min-height:720px}.feed,.messages{overflow-y:auto;touch-action:pan-y;scrollbar-width:thin;scrollbar-color:#bdcbbb transparent;scroll-behavior:auto}.class-picker{position:relative;text-align:left;color:#3e5141}.class-picker summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;border:1px solid #dce5d8;background:#ffffffa8;border-radius:22px;padding:10px 14px;min-height:40px;font-size:12px;transition:background .15s,box-shadow .15s}.class-picker summary::-webkit-details-marker{display:none}.class-picker summary:hover,.class-picker[open] summary{background:white;box-shadow:0 3px 14px #29402e0a}.class-picker summary:focus-visible{outline:3px solid #789e89;outline-offset:3px}.picker-chevron{margin-left:auto;font-size:16px;line-height:1;transition:transform .15s}.class-picker[open] .picker-chevron{transform:rotate(180deg)}.class-options{position:absolute;top:calc(100% + 9px);left:50%;transform:translateX(-50%);z-index:40;width:290px;max-width:calc(100vw - 36px);max-height:280px;overflow-y:auto;padding:9px;background:#fff;border:1px solid #dfe7db;border-radius:18px;box-shadow:0 14px 45px #253a2c22}.picker-label{font-size:9px;letter-spacing:1.3px;color:#889481;padding:10px 11px}.class-option{width:100%;display:flex;align-items:center;gap:10px;text-align:left;border-radius:12px;padding:10px;font-size:12px;line-height:1.4;min-height:48px}.class-option:hover,.class-option:focus-visible{background:#f1f5ed}.class-option.selected{background:#eaf1e6}.option-check{margin-left:auto;color:#557849;min-width:18px}.class-picker summary>span:first-child{max-width:210px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}@media(max-width:760px){.workspace{min-height:680px}.class-options{left:auto;right:-10px;transform:none}.folder-picker{position:relative}.class-picker summary>span:first-child{max-width:185px}}@media(prefers-reduced-motion:reduce){.class-picker summary,.picker-chevron{transition:none}}
/* Keep the folder menu above the sibling recent-class cards. */
.home-center{position:relative;z-index:2}
.materials-body{overflow-y:auto;margin-top:25px;padding-bottom:20px}.upload-area{position:relative;display:flex;flex-direction:column;align-items:center;gap:12px;padding:30px 20px;border:1.5px dashed #b9cbb2;border-radius:20px;background:#edf3e8;text-align:center;cursor:pointer}.upload-area strong{font-size:15px;font-weight:500}.upload-area>span{font-size:11px;color:#72816a}.upload-area .upload-symbol{width:42px;height:42px;display:grid;place-items:center;background:white;border-radius:50%;color:#4f6c42}.upload-area input{position:absolute;opacity:0;width:1px;height:1px}.upload-area:focus-within{outline:3px solid #789e89;outline-offset:3px}.material-note{font-size:10px;color:#7a8774;margin:12px 0 30px}.material-file{display:flex;align-items:center;gap:12px;width:100%;text-align:left;background:white;border:1px solid #e0e7da;border-radius:15px;padding:17px;margin:10px 0}.material-file>span:nth-child(2){flex:1;min-width:0}.material-file strong{display:block;font-size:12px;font-weight:500;overflow-wrap:anywhere}.material-file small{display:block;font-size:10px;color:#829079;margin-top:6px}.materials-back{align-self:flex-start;margin-bottom:20px}.uploaded-title{font-size:16px;font-weight:500;overflow-wrap:anywhere;margin:25px 0 15px}.pdf-preview{width:100%;flex:1;min-height:250px;border:1px solid #dfe6d9;border-radius:14px;background:white}.pdf-open{align-self:flex-start;margin-top:15px;text-decoration:none}

.brand .orb{flex:0 0 36px;width:36px;height:36px;aspect-ratio:1}.picker-chevron{display:inline-flex;align-items:center;justify-content:center;flex:0 0 16px;width:16px;height:16px}.picker-chevron svg{display:block;width:16px;height:16px}