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var(--line);background:#faf7f0;border-radius:4px;font-size:12px}.consent{display:flex;gap:8px;align-items:start;color:var(--muted);font-size:9px;line-height:1.65;margin:13px 0}.consent input{accent-color:var(--rust);margin-top:2px}.login-card form>button{margin-top:5px}.login-card #login-message{font-size:10px;color:var(--rust);min-height:14px}.privacy-small{display:block;margin-top:14px;font-size:9px;line-height:1.7;color:var(--muted)}.toast{position:fixed;bottom:22px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--ink);color:white;padding:12px 18px;border-radius:999px;font-size:11px;z-index:40;transition:.2s}.toast.show{transform:translate(-50%,0);opacity:1}
@media(max-width:900px){.app-shell{grid-template-columns:200px minmax(0,1fr)}.sidebar{padding-left:17px;padding-right:14px}main{padding-left:28px;padding-right:28px}.hero-grid{gap:22px}.hero-art{height:330px}.art-room{inset:30px 22px}.unit-grid{grid-template-columns:repeat(2,1fr)}.zoning-layout{grid-template-columns:1fr}.zoning-copy{display:grid;grid-template-columns:55px 1fr;column-gap:12px}.zoning-copy .concept-number{grid-row:1/3}.zoning-copy h2{margin:0}.zoning-copy>p{grid-column:2}.legend,.tip{grid-column:2}.light-scene{min-height:380px}}
@media(max-width:640px){.topbar{height:64px;padding:0 16px}.brand-mark{width:33px;height:33px}.save-status{display:none}.app-shell{display:block}.sidebar{height:auto;min-height:0;position:sticky;top:64px;z-index:8;width:100%;padding:7px 10px;border-right:0;border-bottom:1px solid var(--line);background:var(--paper)}.side-label,.progress-card,.side-foot{display:none}.sidebar nav{display:flex;overflow-x:auto;gap:4px;scrollbar-width:none}.sidebar nav::-webkit-scrollbar{display:none}.nav-item{white-space:nowrap;padding:10px 11px;font-size:10px}.nav-item span{margin-right:6px}main{padding:0 17px 45px}.page{padding-top:32px}.hero-grid{display:flex;flex-direction:column;align-items:stretch;gap:25px}.hero-copy h1{font-size:54px}.hero-lead{max-width:100%}.hero-art{height:310px}.section-intro{grid-template-columns:1fr;gap:5px;margin:47px 0 20px}.section-intro h2{font-size:29px}.section-intro p{font-size:11px}.unit-grid{gap:8px}.unit-card{min-height:165px;padding:13px}.unit-illustration{height:58px}.unit-card b{font-size:10px}.unit-card small{font-size:9px}.notice{align-items:flex-start;flex-wrap:wrap;padding:15px;gap:10px}.notice p{flex-basis:calc(100% - 40px)}.notice button{margin-left:35px}.lesson-heading h1{font-size:42px}.three-cards{grid-template-columns:1fr}.three-cards article{min-height:200px}.three-cards h3{margin-top:15px}.case-study{grid-template-columns:1fr;padding:20px}.day-strip div{padding:12px 7px}.day-strip i{font-size:22px}.reflection label{line-height:1.7}.page-footer{gap:10px;align-items:flex-start}.page-footer .button{padding:12px 14px;font-size:10px}.floorplan-wrap{padding:9px}.floorplan{height:300px}.floorplan-title{font-size:10px}.floorplan-title small{font-size:8px}.furniture-sofa{width:75px}.furniture-table{left:29%;width:45px}.plan-path{opacity:.8}.scale-board,.light-lab{grid-template-columns:1fr}.scale-explain{padding:23px}.scale-visual{padding:28px 22px}.light-scene{min-height:360px}.light-controls{padding:24px}.quiz-form{grid-template-columns:1fr}.question-card legend{font-size:11px}.studio-grid{grid-template-columns:1fr}.login-card{padding:32px 24px}.hero-meta{gap:14px}.zoning-copy h2{font-size:24px}}
.scene-sofa{background:var(--sofa-color,#a66d53)}.scene-cushion{background:var(--cushion-color,#d8bd91)}.furniture.selected{outline:3px solid #d0714e;transform:scale(1.06);z-index:5}
.teacher-heading,.list-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.teacher-heading h1{font:500 clamp(40px,5vw,60px)/1.15 var(--serif);margin:12px 0}.teacher-heading p:last-child{font-size:12px;color:var(--muted)}.teacher-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.teacher-form,.student-course-card{background:#eae4d8;padding:22px;border-radius:7px;display:grid;gap:10px}.teacher-form h2,.teacher-lists h2,.student-course-card h2{font:500 25px var(--serif);margin:0 0 6px}.teacher-form label{font-size:10px;font-weight:700}.teacher-form input:not([type=checkbox]),.teacher-form textarea,.teacher-form select,.student-assignment-form textarea{width:100%;border:1px solid var(--line);background:#faf7f0;padding:11px;border-radius:4px;font-size:11px;color:var(--ink)}.teacher-form textarea,.student-assignment-form textarea{resize:vertical;line-height:1.7}.teacher-check{display:flex;gap:9px;align-items:center;color:var(--muted);font-weight:400!important;line-height:1.5}.teacher-check input{accent-color:var(--rust)}.teacher-lists{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:42px}.teacher-lists h2{font-size:24px;margin-bottom:17px}.list-heading{margin-bottom:14px}.list-heading h2{margin:0}.list-heading .button{font-size:10px;padding:9px 14px}.managed-course-list,.submission-list{display:grid;gap:10px}.managed-course-card,.submission-card,.student-assignment-card{background:#eee9de;border:1px solid #e0dacc;padding:17px;border-radius:7px}.managed-course-head,.submission-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.managed-course-head h3,.student-assignment-card h3{font:500 19px var(--serif);margin:0}.publish-tag{font-size:9px;color:var(--olive);background:#dfe5d9;padding:5px 8px;border-radius:999px;white-space:nowrap}.managed-course-card>p,.course-description{font-size:11px;color:var(--muted);line-height:1.75}.managed-course-card>small{font-size:9px;color:var(--muted)}.assignment-list-row{display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--line);padding-top:9px;margin-top:10px;font-size:10px}.assignment-list-row small{color:var(--muted);white-space:nowrap}.submission-card{background:#f1ece2}.submission-head b{font-size:11px}.submission-head time,.submitted-time{font-size:9px;color:var(--muted)}.submission-course{font-size:10px;color:var(--rust);font-weight:700;margin:10px 0}.submission-answer{font-size:11px;line-height:1.8;white-space:pre-wrap;background:#faf7f0;padding:10px;border-radius:4px}.file-link{display:inline-block;color:#526b52;font-size:10px;font-weight:700;margin-top:7px;overflow-wrap:anywhere}.empty-state{color:var(--muted);font-size:11px;line-height:1.8;background:#eee9de;padding:17px;border-radius:6px}.student-courses-list{display:grid;gap:15px}.student-course-card{margin-bottom:15px}.student-course-card h2{font-size:29px}.student-assignment-card{margin-top:12px;background:#f3efe6}.student-assignment-card h3{font-size:21px}.assignment-deadline{display:block;color:var(--rust);font-size:9px;margin-top:8px}.student-assignment-card>p{font-size:11px;line-height:1.8;white-space:pre-wrap}.student-assignment-form{display:grid;gap:10px;border-top:1px solid var(--line);padding-top:13px;margin-top:13px}.student-file-label{display:grid;gap:7px;color:var(--muted);font-size:9px}.student-assignment-form input[type=file]{font-size:10px}.student-assignment-form .button{justify-self:start}.student-assignment-form .file-link{margin-top:0}.teacher-lists>section{min-width:0}
+@media(max-width:900px){.teacher-lists{grid-template-columns:1fr}}
+@media(max-width:640px){.top-actions{gap:7px}.top-actions .student-button{padding:8px 10px;font-size:9px}.teacher-grid{grid-template-columns:1fr}.teacher-heading{align-items:flex-start}.teacher-heading>.button{font-size:9px;padding:9px 12px}.teacher-lists{margin-top:30px}.managed-course-card,.submission-card,.student-assignment-card{padding:14px}.assignment-list-row{flex-direction:column;gap:5px}.teacher-form{padding:18px}.student-course-card{padding:16px}.sidebar nav{padding-bottom:2px}}