@charset "UTF-8";
:root{color-scheme:dark;--ink:#f4f7fa;--muted:#a6b4c5;--line:rgba(220,239,255,.14);--glass:rgba(26,42,59,.47);--accent:#b8f0de;--blue:#b6ddff;--radius:28px}*{box-sizing:border-box}body{margin:0;background:#0d1723;color:var(--ink);font:15px/1.6 "Aptos","PingFang SC","Microsoft YaHei",sans-serif;min-height:100vh}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button{cursor:pointer}a,button,input,select,textarea{outline-offset:5px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent)}button:disabled{opacity:.5;cursor:wait}input,select,textarea{color:var(--ink);border:1px solid var(--line);border-radius:13px;background:rgba(8,19,31,.48);padding:13px 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solid var(--line);border-top-color:rgba(245,255,255,.25);box-shadow:0 14px 45px rgba(0,5,17,.17),inset 0 1px 0 rgba(255,255,255,.04);backdrop-filter:blur(24px) saturate(125%);-webkit-backdrop-filter:blur(24px) saturate(125%);border-radius:var(--radius)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:15px 22px;border-radius:23px}.brand{display:flex;gap:12px;align-items:center;font-size:22px;letter-spacing:3px;font-weight:600;flex-shrink:0}.brand small{display:block;letter-spacing:2px;font-size:8px;font-weight:400;color:var(--muted)}.brandmark{width:43px;height:43px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(140deg,rgba(218,255,247,.36),rgba(180,224,232,.05));box-shadow:inset 1px 1px 1px #ddfff86b,0 5px 10px #0002;font-family:"STSong","SimSun",serif;color:#dbfbf2}.topbar nav{display:flex;gap:28px;color:var(--muted);font-size:13px}.topbar nav 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span{font-size:33px;font-weight:300;line-height:1.15;letter-spacing:2px;color:#e0efedce}.hero-sphere small{font-size:9px;margin-top:15px;letter-spacing:3px;color:#a8c6c4}.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.stats-row.four{grid-template-columns:repeat(4,1fr)}.stat{padding:23px 29px;display:flex;justify-content:space-between;align-items:center;gap:12px;border-radius:23px}.stat>span{font-size:12px;color:var(--muted)}.stat strong{font-size:34px;font-weight:300;letter-spacing:-1px;white-space:nowrap}.stat small{font-size:14px}.live-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px #a6efd44d;margin-left:10px;vertical-align:middle}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:44px 0 22px}.section-heading h2{margin:0}.section-heading .eyebrow{margin-bottom:7px}.filter select{padding:9px 35px 9px 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h1{font-size:clamp(32px,3.4vw,49px)}.page-heading .eyebrow{margin-bottom:14px}.two-column{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:25px;align-items:start}.upload-panel,.side-panel,.form-panel{padding:32px}.side-panel h2{margin-bottom:12px}.upload-panel>.section-heading{margin:0 0 23px}.instructions{color:#bdcbd9;white-space:normal;overflow-wrap:anywhere;font-size:14px}.dropzone{margin-top:28px;border:1px dashed #bfe8dc60;background:radial-gradient(ellipse at top,#a7e6d30d,transparent);border-radius:21px;min-height:248px;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;text-align:center;padding:25px;transition:.2s}.dropzone:hover,.dropzone.dragover{border-color:var(--accent);background:#b0efd81a;box-shadow:inset 0 0 30px #93e4c710}.dropzone h3{margin:19px 0 5px}.dropzone p{font-size:12px;margin-bottom:8px}.dropzone small{font-size:10px}.upload-orb{height:56px;width:56px;border-radius:18px;border:1px solid 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25px;border-radius:22px;width:fit-content;margin-top:44px;transform:rotate(-3deg)}.floating-card strong{font-weight:400;font-size:13px}.floating-card p{font-size:10px;margin:4px 0 0}.orb-icon{width:40px;height:40px;background:#d4f2eb1c;border-radius:50%;display:grid;place-items:center;font-size:22px;color:var(--accent)}.large-number{position:absolute;right:10px;bottom:-30px;font-size:90px;font-weight:200;color:#d5f1f007;letter-spacing:-6px;z-index:-1}.login-card{padding:42px 38px;max-width:440px;width:100%}.login-card h2{margin:25px 0 12px}.login-card>.quiet{font-size:12px;margin-bottom:28px}.login-card .stack{gap:13px}.login-card .button{margin-top:10px}.login-card>.pill{font-size:8px;letter-spacing:1.5px}footer{display:flex;justify-content:space-between;gap:20px;margin-top:65px;padding:25px 0;border-top:1px solid var(--line);font-size:10px;color:#a8baca}footer>.quiet{font-size:8px;letter-spacing:1.5px}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}main{animation:arrive .6s ease both}@keyframes arrive{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1500px){.shell{max-width:1480px;padding-top:35px}.hero{padding-top:85px;padding-bottom:60px}}@media(max-width:1100px){.shell{padding:24px 30px 0}.assignment-grid{grid-template-columns:repeat(2,1fr)}.stats-row.four{grid-template-columns:repeat(2,1fr)}.login-layout{gap:45px;padding:60px 10px}.login-intro h1{font-size:55px}.hero-sphere{margin-right:20px;width:210px;height:210px}.topbar nav{gap:18px}.two-column{grid-template-columns:minmax(0,1.4fr) minmax(0,1fr)}.login-card{padding:32px}.stat{padding:22px}}@media(max-width:760px){.shell{padding:15px 18px 0}.topbar{padding:12px 16px;gap:12px;flex-wrap:wrap;border-radius:20px}.brand{font-size:18px}.brandmark{width:36px;height:36px;border-radius:12px}.brand small{font-size:6px}.topbar nav{order:3;width:100%;justify-content:space-between;border-top:1px solid var(--line);padding:12px 4px 0;font-size:12px;gap:12px}.topbar>.quiet{font-size:9px;max-width:115px}.account{gap:8px;font-size:10px}.icon-button{font-size:10px}.hero{padding:45px 3px 30px;gap:5px;overflow:hidden}.hero h1{font-size:39px;letter-spacing:-1.5px}.hero .lead{font-size:12px}.hero-sphere{width:135px;height:135px;min-width:135px;margin:0 -33px 0 0;opacity:.8}.hero-sphere span{font-size:19px}.hero-sphere small{font-size:6px;letter-spacing:1px}.hero-sphere:after{inset:-12px}.eyebrow{font-size:8px;letter-spacing:1.4px}.stats-row{gap:9px}.stat{padding:15px 13px;border-radius:17px;display:block}.stat>span{font-size:10px;display:block}.stat strong{font-size:29px}.stat .live-dot{width:5px;height:5px;margin-left:6px}.section-heading{margin-top:30px}.section-heading h2{font-size:21px}.filter{max-width:155px}.filter select{font-size:11px}.assignment-grid{grid-template-columns:1fr;gap:15px}.assignment-card{padding:24px}.card-top{margin-bottom:25px}.two-column{grid-template-columns:1fr;gap:20px}.upload-panel,.side-panel,.form-panel{padding:23px}.page-heading{padding-top:36px}.page-heading h1{font-size:33px;letter-spacing:-1px}.page-heading .lead{font-size:12px}.hero.compact{display:block;padding-top:35px}.hero.compact h1{font-size:35px}.hero.compact .button{margin-top:10px}.toolbar .button{font-size:11px;padding:10px 12px}.empty{padding:35px 22px}.empty h2{font-size:20px}th,td{padding:15px}.login-layout{display:flex;flex-direction:column;align-items:stretch;gap:25px;padding:45px 5px}.login-intro h1{font-size:47px;margin:20px 0}.login-intro .lead{font-size:12px}.floating-card,.large-number{display:none}.login-card{max-width:none;padding:28px}.login-card h2{font-size:23px}.login-intro .eyebrow{font-size:8px}.login-layout{min-height:auto}footer{font-size:9px;margin-top:40px;flex-direction:column;gap:10px}.dropzone{min-height:215px}.mini-stats{gap:7px}.table-panel{border-radius:20px}.stack{gap:18px}.roster-list>div{flex-wrap:wrap}.inline-form{min-width:280px}.audit-detail{min-width:220px}.notice{font-size:12px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.element-option{cursor:pointer;gap:6px}.element-option input[type=checkbox]{margin:0;width:14px;height:14px}.element-options .element-option{display:inline-flex;margin:0}

.selection-row{display:flex;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);cursor:pointer;font-size:13px}.selection-row span{flex:1}.selection-row small{display:block;font-size:11px}.selection-row input[type=checkbox]{width:18px;flex:none}.student-picker{max-height:560px;overflow:auto;margin-top:15px}.selection-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:15px}.selection-row .pill{flex:none}.topbar nav{gap:18px}@media(max-width:760px){.topbar nav{flex-wrap:wrap;justify-content:flex-start;column-gap:18px;row-gap:10px}}