@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800;900&display=swap');
:root{--blue:#235dea;--navy:#11234b;--ink:#182841;--muted:#6c7890;--line:#e4eaf4;--bg:#f5f7fc;--pale:#edf3ff;--green:#157c63;--radius:18px;--font:'Noto Sans KR',-apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo',sans-serif}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--bg);font:16px/1.65 var(--font)}button,input,textarea,select{font:inherit}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.52}button{border:0;background:none;color:inherit}input,textarea,select{max-width:100%;min-width:0}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #7ea9ff;outline-offset:3px}h1,h2,h3,h4,p{margin-top:0}h1{font-size:34px;letter-spacing:-1.3px;line-height:1.4;margin-bottom:14px}h2{font-size:23px;letter-spacing:-.7px;margin-bottom:18px;line-height:1.5}h3{font-size:18px;letter-spacing:-.35px;line-height:1.6;margin-bottom:8px}small,.small{font-size:13px}svg.icon{width:20px;height:20px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}img,video{max-width:100%}.skip{position:fixed;left:20px;top:-100px;background:#fff;padding:10px;z-index:100}.skip:focus{top:45px}.prototype{height:36px;background:#172a50;color:#dce7ff;position:fixed;z-index:40;inset:0 0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 25px;font-size:12px;gap:14px}.prototype b{color:white;margin-right:14px}.prototype a{color:white;text-decoration:underline;text-underline-offset:3px;white-space:nowrap}#sidebar{position:fixed;top:36px;left:0;bottom:0;width:228px;background:#fff;border-right:1px solid var(--line);z-index:30;display:flex;flex-direction:column;padding:28px 16px 18px}.brand{display:flex;align-items:center;gap:10px;padding:0 10px 32px;font-size:24px;font-weight:900;letter-spacing:-1.4px}.brand span:last-child{font-size:11px;font-weight:600;color:var(--muted);letter-spacing:1.5px;line-height:1.5}.brandmark{width:35px;height:35px;background:var(--blue);color:#fff;border-radius:10px;display:grid;place-items:center;font-size:23px;line-height:1}.nav-label{font-size:12px;color:#8793a6;padding:14px 14px 8px;letter-spacing:.8px}.navlink{display:flex;align-items:center;gap:12px;padding:12px 15px;border-radius:10px;margin-bottom:5px;font-size:14px;font-weight:500;color:#66748c}.navlink.active{background:#edf3ff;color:var(--blue);font-weight:700}.navlink:hover{background:#f4f7fc}.navlink .count{margin-left:auto;background:#eef2f9;color:#5a6b87;border-radius:6px;padding:0 6px;font-size:12px}.navlink.active .count{color:var(--blue);background:#dae7ff}.side-bottom{margin-top:auto;padding-top:24px}.side-note{background:#f5f8fd;border-radius:12px;padding:16px 12px;font-size:13px;color:var(--muted);margin:0 5px 18px}.side-note strong{color:#405170;display:block;margin-bottom:5px}.side-bottom .navlink{font-size:13px}.app{margin-left:228px;padding-top:36px}#header{height:86px;padding:0 40px;display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.95);border-bottom:1px solid var(--line);gap:16px}.crumb{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:9px}.crumb b{color:var(--ink);font-weight:600}.header-right{display:flex;gap:14px;align-items:center}.avatar{display:grid;place-items:center;border-radius:50%;width:36px;height:36px;background:#dfeaff;font-size:14px;color:#2455bd;font-weight:700}.profile{display:flex;align-items:center;gap:9px;font-size:13px}.icon-btn{width:38px;height:38px;border:1px solid var(--line);border-radius:10px;display:grid;place-items:center;background:#fff}.menu-toggle{display:none}#main{max-width:1450px;margin:0 auto;padding:36px 40px 50px;min-height:calc(100vh - 200px)}footer{display:flex;gap:22px;align-items:center;justify-content:space-between;padding:20px 40px;border-top:1px solid var(--line);font-size:12px;color:#8b96a9}footer .text-btn{font-size:12px;color:var(--muted)}.eyebrow{font-size:12px;font-weight:700;letter-spacing:1.8px;color:var(--blue);margin-bottom:10px}.muted{color:var(--muted)}.lead{font-size:16px;line-height:1.85;color:var(--muted);margin-bottom:0}.page-title{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:28px}.page-title p{color:var(--muted);margin:0;font-size:14px}.page-title h1{font-size:28px;letter-spacing:-.8px;margin-bottom:8px}.row{display:flex;gap:12px;align-items:center}.spread{display:flex;justify-content:space-between;align-items:center;gap:15px}.wrap{flex-wrap:wrap}.stack{display:grid;gap:20px}.grid{display:grid;gap:22px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.split{display:grid;grid-template-columns:minmax(0,1fr) 315px;gap:26px;align-items:start}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}.card.flat{padding:0;overflow:hidden}.btn{padding:11px 18px;min-height:44px;display:inline-flex;justify-content:center;align-items:center;gap:8px;border:1px solid transparent;border-radius:9px;background:var(--blue);color:#fff;font-size:14px;font-weight:600;line-height:1.5;transition:background .18s,transform .18s}.btn:hover{background:#174ccc;transform:translateY(-1px)}.btn.secondary{background:#fff;border-color:#dbe3f0;color:#435574}.btn.secondary:hover{background:#f5f8fd}.btn.soft{background:#edf3ff;color:var(--blue)}.btn.dark{background:var(--navy)}.btn.danger{background:#fff0f0;color:#bd4343}.btn.block{width:100%}.btn.sm{padding:8px 13px;min-height:37px;font-size:13px}.text-btn{color:var(--blue);font-size:14px;font-weight:500;padding:3px 0}.text-btn:hover{text-decoration:underline}.badge{display:inline-flex;align-items:center;gap:5px;padding:4px 9px;border-radius:6px;font-size:12px;font-weight:600;white-space:nowrap;background:#eef3fb;color:#5c6d89}.badge.blue{color:#1f5ace;background:#eaf1ff}.badge.green{background:#e8f6f0;color:#19715b}.badge.orange{background:#fff3e3;color:#a96a1e}.badge.red{background:#fff0ed;color:#b44e40}.badge.white{background:rgba(255,255,255,.15);color:#fff}.divider{height:1px;background:var(--line);margin:24px 0}.tabs{display:flex;gap:23px;border-bottom:1px solid var(--line);margin:24px 0}.tab{font-size:14px;color:var(--muted);padding:13px 2px;border-bottom:2px solid transparent}.tab.active{color:var(--blue);border-bottom-color:var(--blue);font-weight:700}.pill-tabs{display:flex;gap:7px;flex-wrap:wrap}.pill-tabs button{padding:8px 14px;border-radius:8px;font-size:13px;background:#fff;border:1px solid var(--line);color:#64728c}.pill-tabs button.active{background:var(--navy);border-color:var(--navy);color:#fff}.intro-banner{position:relative;background:#e8f0ff;border:1px solid #dce7fc;border-radius:22px;padding:34px 36px;display:grid;grid-template-columns:1fr .85fr;gap:30px;margin-bottom:32px;overflow:hidden}.intro-banner h1{font-size:36px;color:#14356f;max-width:500px}.intro-banner .lead{font-size:15px;color:#526a92;max-width:420px}.intro-banner .row{margin-top:24px}.journey{display:grid;gap:10px;align-self:center;padding:8px 0}.journey-item{background:#ffffffc9;border:1px solid #fff;border-radius:12px;display:flex;align-items:center;padding:13px 16px;gap:13px;box-shadow:0 5px 20px #456fb10a}.journey-item:nth-child(2){margin-left:24px}.journey-item:nth-child(3){margin-left:48px}.journey-item .step-circle{background:#e8f0ff;color:var(--blue);border-radius:50%;width:32px;height:32px;display:grid;place-items:center;font-size:13px}.journey-item b{font-size:14px;font-weight:600}.journey-item span:last-child{margin-left:auto;font-size:12px;color:var(--muted)}.section-title{display:flex;justify-content:space-between;align-items:center;margin:28px 0 17px;gap:12px}.section-title h2{font-size:21px;margin:0}.program-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:17px}.program-cover{padding:26px 28px;height:188px;display:flex;flex-direction:column;justify-content:space-between;background:#183971;color:#fff;position:relative}.program-cover.p2{background:#e5edff;color:#233f7a}.program-cover 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17px;font-size:13px;line-height:1.75}.notice.warn{background:#fff8eb;border-color:#f3e6c8;color:#8b682d}.notice.neutral{background:#f7f9fc;border-color:var(--line);color:var(--muted)}.mini-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.stat{padding:22px 24px;background:#fff;border:1px solid var(--line);border-radius:14px}.stat label{display:block;color:var(--muted);font-size:13px;margin-bottom:6px}.stat strong{font-size:29px;letter-spacing:-1px}.stat small{font-size:13px;color:#8290a6;margin-left:6px}.progress{height:7px;background:#e9eff9;border-radius:5px;overflow:hidden}.progress i{height:100%;background:var(--blue);display:block;border-radius:5px;transition:width .3s}.course-row{display:flex;gap:25px;align-items:center}.course-swatch{width:150px;height:125px;background:#17386e;color:#fff;border-radius:12px;padding:22px;flex-shrink:0;display:flex;flex-direction:column;justify-content:space-between}.course-swatch strong{font-size:21px;letter-spacing:-1px}.course-swatch span{font-size:11px;letter-spacing:2px;color:#a8c4f2}.flex1{flex:1;min-width:0}.lesson-list{list-style:none;padding:0;margin:0}.lesson-row{display:flex;gap:14px;align-items:center;padding:18px 22px;border-bottom:1px solid #edf1f7;transition:background .2s}.lesson-row:last-child{border-bottom:0}.lesson-row:hover{background:#f7faff}.lesson-icon{height:36px;width:36px;border:1px solid var(--line);background:#f7f9fd;border-radius:10px;display:grid;place-items:center;color:#7e8da5;flex-shrink:0}.lesson-icon.done{background:#eaf6f0;color:#268167;border:0}.lesson-icon.active{color:var(--blue);background:#eaf1ff;border:0}.lesson-row p{font-size:14px;font-weight:600;margin:0}.lesson-row small{color:var(--muted)}.lesson-row .end{margin-left:auto;text-align:right;white-space:nowrap}.label{display:block;font-size:14px;font-weight:600;margin-bottom:9px}.field{margin-bottom:22px}.field input:not([type=checkbox]):not([type=radio]):not([type=file]),.field textarea,.field select,.search{background:#fff;border:1px solid #dce3ef;border-radius:9px;padding:12px 14px;width:100%;color:var(--ink);outline-offset:2px}.field textarea{resize:vertical;min-height:145px;line-height:1.8}.field .hint{font-size:12px;color:var(--muted);margin-top:7px}.required{color:#dd654f;margin-left:5px}.checkline{display:flex;align-items:flex-start;gap:10px;font-size:14px;margin:12px 0;cursor:pointer}.checkline input{accent-color:var(--blue);margin-top:6px;width:16px;height:16px;flex-shrink:0}.field-error,.error{color:#bf453e;font-size:13px;margin:8px 0}.field-error:empty,.error:empty{display:none}.login-layout{max-width:940px;display:grid;grid-template-columns:.9fr 1fr;margin:24px auto;border-radius:24px;border:1px solid var(--line);overflow:hidden;background:#fff;min-height:520px}.login-aside{background:#e6efff;padding:42px 32px;display:flex;flex-direction:column;justify-content:space-between}.login-aside h2{color:#173d7c;font-size:28px;line-height:1.7}.login-form{padding:42px}.stepper{display:flex;gap:9px;align-items:center;margin:0 0 25px;font-size:13px}.stepper .step{display:flex;gap:7px;align-items:center;color:#9ca7b7}.stepper .step b{width:24px;height:24px;border:1px solid #dce3ef;border-radius:50%;display:grid;place-items:center;font-size:12px}.stepper .step.active{color:var(--blue);font-weight:600}.stepper .step.active b{background:var(--blue);color:#fff;border-color:var(--blue)}.stepper .step-line{width:24px;height:1px;background:#dce3ef}.summary-row{display:flex;justify-content:space-between;gap:15px;font-size:14px;padding:9px 0}.summary-row span:first-child{color:var(--muted)}.sticky{position:sticky;top:58px}.success-panel{max-width:620px;margin:25px auto;text-align:center;padding:45px}.result-icon{width:68px;height:68px;border-radius:50%;background:#e6f6f0;color:#1a8b6b;display:grid;place-items:center;margin:0 auto 20px}.result-icon svg{width:32px;height:32px}.success-panel .summary-row{text-align:left}.video-wrap{background:#102b56;border-radius:15px;overflow:hidden;position:relative;aspect-ratio:16/9;display:grid;place-items:center;color:white}.video-wrap video{width:100%;height:100%;object-fit:contain;background:#102b56}.video-placeholder{text-align:center;padding:24px}.video-placeholder .bigplay{border:1px solid #8aaee0;border-radius:50%;width:65px;height:65px;margin:0 auto 15px;display:grid;place-items:center;background:#ffffff15}.video-placeholder h2{font-size:24px;color:#fff;margin-bottom:8px}.video-placeholder p{font-size:13px;color:#9cbee9}.video-note{font-size:12px;color:var(--muted);margin:10px 0 20px}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:25px}.lesson-layout .card{padding:22px}.lesson-outline{border-radius:14px;border:1px solid var(--line);background:#fff;overflow:hidden}.lesson-outline h3{padding:20px;margin:0}.lesson-outline .lesson-row{padding:13px 17px}.lesson-outline .lesson-row p{font-size:13px}.assignment-types{display:flex;gap:12px}.type-icon{height:46px;width:46px;border-radius:12px;display:grid;place-items:center;color:var(--blue);background:#edf3ff;flex-shrink:0}.type-icon.green{background:#e7f6f2;color:#1d8d76}.type-icon.purple{background:#eff0ff;color:#6961c9}.assignment-card{display:flex;align-items:center;gap:18px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;margin-bottom:12px}.assignment-card p{margin:0;font-size:14px}.assignment-card h3{margin:0 0 3px;font-size:16px}.assignment-head{background:#eaf2ff;border-radius:14px;padding:24px 28px;margin-bottom:24px}.assignment-head h2{margin-bottom:9px}.assignment-head p{margin-bottom:0;font-size:14px;color:#566f98}.exercise-quote{border-left:3px solid #90b3fa;padding:10px 20px;margin:20px 0;font-size:21px;color:#193a73;line-height:1.8;background:#f7faff}.upload-zone{display:flex;justify-content:center;align-items:center;flex-direction:column;border:1.5px dashed #c4d4ed;border-radius:11px;background:#fafcff;min-height:140px;padding:23px;gap:8px;position:relative;text-align:center;cursor:pointer}.upload-zone:hover{border-color:var(--blue);background:#f3f7ff}.upload-zone svg{color:#7395c9;width:26px;height:26px}.upload-zone strong{font-size:14px;font-weight:500}.upload-zone span{font-size:12px;color:var(--muted)}.upload-zone input{position:absolute;inset:0;opacity:0;width:100%;height:100%;cursor:pointer}.attachments{display:grid;gap:9px;margin-top:12px}.file-item{padding:10px 13px;border:1px solid var(--line);border-radius:9px;background:#fff;font-size:13px}.file-item img{max-height:150px;max-width:100%;border-radius:6px;display:block;margin-top:10px}.file-item audio,.file-item video{width:100%;margin-top:10px}.file-item .remove{color:#a3adba;font-size:20px;padding:0 6px}.actions{display:flex;justify-content:space-between;align-items:center;gap:12px;border-top:1px solid var(--line);margin-top:25px;padding-top:20px}.char-count{text-align:right;font-size:12px;color:var(--muted);margin-top:5px}.radio-options{display:grid;gap:8px}.radio-options label{border:1px solid var(--line);padding:11px 14px;border-radius:9px;font-size:14px;display:flex;gap:10px;align-items:center;cursor:pointer}.radio-options label:has(input:checked){border-color:#7296ef;background:#f3f7ff}.radio-options input{accent-color:var(--blue)}.toolbar{display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}.toolbar .search{font-size:14px;max-width:275px;padding:9px 13px}.table-scroll{overflow:auto}table{width:100%;border-collapse:collapse;font-size:13px;text-align:left}th{background:#f8fafe;color:#7a879b;font-weight:500;padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap}td{padding:17px 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var(--line);border-radius:9px;flex:1;resize:vertical;min-height:60px;padding:12px;min-width:0;font-size:14px}.builder{display:grid;grid-template-columns:190px minmax(0,1fr);gap:20px}.builder-tools{align-self:start;padding:18px}.builder-tools button{display:flex;width:100%;gap:10px;font-size:13px;align-items:center;padding:10px;border:1px solid var(--line);border-radius:8px;margin:8px 0}.builder-block{border:1px solid var(--line);padding:20px;border-radius:12px;background:#fff;margin-bottom:13px}.builder-block select,.builder-block input[type=text]{border:1px solid var(--line);border-radius:7px;padding:9px;width:100%;font-size:13px}.builder-block .row{margin-top:12px}.builder-block .row label{font-size:12px;color:var(--muted)}.empty{padding:45px 25px;text-align:center;color:var(--muted)}.empty svg{width:35px;height:35px;color:#a2b5d6}.empty h3{color:#445978;margin:15px 0 8px}.date-mode{display:flex;gap:8px;font-size:12px;align-items:center;color:var(--muted)}.date-mode select{font-size:12px;border:1px solid #dde5f2;border-radius:6px;padding:5px;background:#fff;color:#536783}.two-col-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}.two-col-list div{background:#f6f9fe;padding:15px;border-radius:9px;font-size:13px}.two-col-list b{display:block;font-size:14px;margin-bottom:4px}#toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,20px);background:#172d51;color:#fff;box-shadow:0 8px 35px #142d5530;padding:12px 22px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;z-index:90;transition:.2s;max-width:90vw;text-align:center}#toast.show{opacity:1;transform:translate(-50%,0)}dialog{border:1px solid var(--line);border-radius:17px;padding:30px;max-width:560px;width:calc(100% - 36px);box-shadow:0 20px 90px #10244b35;color:var(--ink)}dialog::backdrop{background:#15284475}dialog p,dialog li{font-size:14px;line-height:1.9}dialog ul{padding-left:22px}.mobile-only{display:none}.lesson-caption{background:#f8faff;border-radius:10px;padding:14px;font-size:14px;color:#587095}.review-rubrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.review-rubrics select{font-size:13px;padding:8px;width:100%;border:1px solid var(--line);border-radius:7px}.review-rubrics label{font-size:12px;color:var(--muted);display:block;margin-bottom:5px}.form-preview-banner{margin-bottom:20px}.nav-sep{height:1px;margin:15px 10px;background:var(--line)}.review-helper{font-size:12px;line-height:1.7;color:#8b96a9}.catalog-meta{margin-bottom:16px;font-size:13px;color:var(--muted)}.lock-panel{padding:45px 25px;text-align:center;background:#f2f6fe;border-radius:16px;border:1px solid #dfe8f7}.lock-panel svg{width:38px;height:38px;color:#7d9dcc;margin-bottom:18px}.flow-page{max-width:1250px;margin:auto;padding:45px 28px}.flow-head{display:flex;justify-content:space-between;align-items:center;gap:20px}.flow-lane{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;margin:20px 0}.flow-track{display:flex;gap:12px;align-items:stretch;overflow:auto;padding:4px 0 15px}.flow-node{flex:1;min-width:130px;background:#f6f9ff;border:1px solid #dfe8f7;border-radius:11px;padding:15px;position:relative;font-size:14px}.flow-node b{display:block;margin:6px 0}.flow-node small{display:block;color:var(--muted);font-size:12px;line-height:1.7}.flow-node:hover{background:#eaf2ff;border-color:#92b1f1}.flow-arrow{display:flex;align-items:center;color:#9eb2d6}.flow-lane.teacher .flow-node{background:#f3f1ff;border-color:#e1dff8}.flow-branch{margin:4px 0 0;padding:11px 15px;background:#fff7e9;border-radius:8px;font-size:13px;color:#926c2f}.flow-index td{white-space:normal}.source-links{font-size:13px;display:flex;flex-wrap:wrap;gap:18px;color:var(--blue);margin-top:25px}
@media(min-width:1550px){#main{padding-top:45px}.intro-banner{padding:45px}.intro-banner h1{font-size:42px}}@media(max-width:1150px){#sidebar{width:205px}.app{margin-left:205px}#header{padding:0 25px}#main{padding:28px 25px 40px}.intro-banner{padding:28px;gap:20px}.intro-banner h1{font-size:31px}.split{grid-template-columns:minmax(0,1fr) 285px;gap:20px}.review-layout{grid-template-columns:1fr}.lesson-layout{grid-template-columns:1fr}.lesson-outline{max-height:340px;overflow:auto}.header-right .profile span{display:none}.course-row{gap:18px}.course-swatch{width:120px}.flow-track{flex-wrap:wrap}.flow-node{min-width:140px}}
@media(max-width:850px){#sidebar{transform:translateX(-100%);transition:transform .2s;width:228px;box-shadow:0 15px 30px #172a5015}body.nav-open #sidebar{transform:translateX(0)}.app{margin-left:0}.menu-toggle{display:grid}#header{height:70px;padding:0 22px}.header-right{gap:9px}#main{padding:25px 22px}.intro-banner{grid-template-columns:1fr}.journey{display:none}.intro-banner h1{font-size:32px}.split{grid-template-columns:1fr}.sticky{position:static}.login-layout{grid-template-columns:1fr;max-width:530px}.login-aside{display:none}.messages{grid-template-columns:190px 1fr}.grid.three{grid-template-columns:1fr}.mini-stats{gap:12px}.stat{padding:17px}.builder{grid-template-columns:1fr}.builder-tools{display:flex;flex-wrap:wrap;gap:7px}.builder-tools h3{width:100%}.builder-tools button{width:auto;margin:0}.prototype{padding:0 18px}.date-mode{display:none}.flow-head{align-items:flex-start}footer{padding:18px 22px}.flow-track{flex-wrap:nowrap}}
@media(max-width:560px){h1{font-size:28px}.prototype{font-size:11px;height:36px;gap:4px}.prototype-copy{display:none}.prototype b{margin-right:0}#main{padding:22px 16px 35px}#header{padding:0 16px;gap:8px}.crumb{font-size:12px}.header-right .btn{font-size:12px;padding:9px 11px}.grid.two{grid-template-columns:1fr}.intro-banner{padding:25px 23px;border-radius:16px}.intro-banner h1{font-size:30px}.intro-banner .row{gap:8px;flex-wrap:wrap}.card{padding:20px}.page-title h1{font-size:25px}.page-title{flex-wrap:wrap;margin-bottom:22px}.page-title .btn{font-size:12px}.program-body{padding:22px}.program-cover{height:168px;padding:22px}.course-row{flex-wrap:wrap}.course-swatch{width:100%;height:100px;flex-direction:row;align-items:center}.course-row .btn{width:100%;margin-top:4px}.mini-stats{gap:8px}.stat{padding:13px 11px}.stat label{font-size:11px}.stat strong{font-size:24px}.stat small{display:block;margin:0;font-size:11px}.assignment-card{padding:16px;gap:12px;flex-wrap:wrap}.assignment-card .btn{margin-left:auto}.assignment-card h3{font-size:15px}.assignment-card .muted{font-size:12px}.login-form{padding:28px 22px}.messages{grid-template-columns:1fr}.conversation-list{border-right:0;border-bottom:1px solid var(--line);padding:13px}.conversation{padding:18px}.conversation-list .person{padding:10px}.conversation{min-height:400px}.review-layout{display:block}.review-layout>.card{margin-bottom:20px}.review-rubrics{grid-template-columns:1fr}.stepper{font-size:12px;gap:5px}.stepper .step-line{width:15px}.assignment-head{padding:20px}.two-col-list{grid-template-columns:1fr}.actions{flex-wrap:wrap}.success-panel{padding:30px 20px}.video-placeholder h2{font-size:18px}.video-placeholder p{font-size:11px}.video-placeholder .bigplay{width:45px;height:45px}.exercise-quote{font-size:18px}.flow-head{display:block}.flow-head .btn{margin:10px 0}.flow-page{padding:25px 16px}.flow-lane{padding:18px}.flow-node{min-width:145px}footer{gap:8px;font-size:11px;flex-wrap:wrap}footer span:last-child{display:none}.lesson-row{padding:15px}.price{font-size:25px}.toolbar .search{max-width:none}.bubble{max-width:95%}.review-rubrics{grid-template-columns:repeat(3,1fr)}.review-rubrics select{font-size:12px;padding:5px}.composer{flex-wrap:wrap}.composer .btn{margin-left:auto}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* Interactive states and final layout refinements */
[hidden]{display:none!important}.hint{font-size:12px;color:var(--muted);line-height:1.8}.tabs>button,.tabs>a,.tabs>span{padding:12px 2px;border-bottom:2px solid transparent;font-size:14px;white-space:nowrap;color:var(--muted)}.tabs>.active{color:var(--blue);border-bottom-color:var(--blue);font-weight:700}.tabs{overflow:auto;gap:22px}.lesson-row.selected{background:#eef4ff}.lesson-layout .card.flat{padding:0}.video-note{padding:18px 22px;margin:0}.assignment-head{display:flex;gap:16px;align-items:center}.toolbar{padding:20px;margin:0}.search{display:flex;gap:8px;align-items:center}.search input{border:0;outline:0;width:100%;font-size:13px}.composer input,#comment-form input{border:1px solid var(--line);border-radius:9px;padding:12px;flex:1;width:100%;font-size:14px}.conversation-list{padding:0}.conversation{padding:0}.bubbles{padding:24px;margin:0;max-height:440px;overflow:auto;min-height:240px}.composer{padding:20px;border-top:1px solid var(--line)}.bubble p{margin:7px 0 0}.bubble small{margin:0}.review-layout>.stack{align-content:start}.card h2:last-child{margin-bottom:0}.answer-block .file-item{white-space:normal}.flow-index td:first-child{white-space:nowrap}.flow-node .badge{font-size:10px}.flow-scope{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:25px 0}.flow-scope h3{font-size:17px}.flow-scope p{font-size:13px;color:var(--muted);margin:0}.flow-page .source-links a{text-decoration:underline;text-underline-offset:3px}
@media(max-width:560px){.tabs{gap:16px}.tabs>button{font-size:12px}.assignment-card .flex1{flex-basis:60%}.assignment-card .badge{margin-left:58px}.review-layout>.card{margin-top:20px}.conversation-list>div{padding:15px!important}.conversation>div.spread{padding:16px!important}.conversation>div.spread .btn{font-size:11px;padding:7px}.composer input{flex-basis:65%}#comment-form{flex-wrap:wrap}#comment-form input{flex-basis:75%}.flow-scope{grid-template-columns:1fr}.stepper .step{font-size:11px}.page-title p{line-height:1.8}.card.sticky .row{flex-wrap:wrap}.builder-tools .btn.block{width:auto!important}}