*,:before,:after,::backdrop{--tw-border-spacing-x:0;--tw-border-spacing-y:0;--tw-translate-x:0;--tw-translate-y:0;--tw-rotate:0;--tw-skew-x:0;--tw-skew-y:0;--tw-scale-x:1;--tw-scale-y:1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness:proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-color:#3b82f680;--tw-ring-offset-shadow:0 0 #0000;--tw-ring-shadow:0 0 #0000;--tw-shadow:0 0 #0000;--tw-shadow-colored:0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }*,:before,:after{box-sizing:border-box;border:0 solid #e5e7eb}:before,:after{--tw-content:""}html,:host{-webkit-text-size-adjust:100%;tab-size:4;font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent;font-family:ui-sans-serif,system-ui,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji;line-height:1.5}body{line-height:inherit;margin:0}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-feature-settings:normal;font-variation-settings:normal;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-feature-settings:inherit;font-variation-settings:inherit;font-family:inherit;font-size:100%;font-weight:inherit;line-height:inherit;letter-spacing:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:#0000;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dl,dd,h1,h2,h3,h4,h5,h6,hr,figure,p,pre{margin:0}fieldset{margin:0;padding:0}legend{padding:0}ol,ul,menu{margin:0;padding:0;list-style:none}dialog{padding:0}textarea{resize:vertical}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}button,[role=button]{cursor:pointer}:disabled{cursor:default}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}[hidden]:where(:not([hidden=until-found])){display:none}.visible{visibility:visible}.fixed{position:fixed}.absolute{position:absolute}.relative{position:relative}.inline{display:inline}.flex{display:flex}.grid{display:grid}.contents{display:contents}.hidden{display:none}.transform{transform:translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.border{border-width:1px}.uppercase{text-transform:uppercase}.underline{text-decoration-line:underline}.filter{filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}:root,[data-theme=dark]{--bg:#0b0b0f;--surface:#14141b;--surface-2:#1c1c25;--surface-3:#24242f;--border:#2a2a37;--border-soft:#1e1e29;--text:#f1f1f4;--text-mute:#8c8c99;--text-dim:#5d5d6a;--accent:#a78bfa;--accent-2:#c4b5fd;--accent-soft:#2a2342;--accent-glow:#a78bfa2e;--success:#6ee7b7;--warn:#fcd34d;--danger:#f87171;--radius:12px;--radius-sm:8px;--radius-lg:16px;--shadow:0 1px 0 #ffffff0a inset, 0 8px 24px #00000059;--shadow-lg:0 1px 0 #ffffff0a inset, 0 24px 60px #0000008c;--topbar-bg:#0b0b0fd9;--sans:"IBM Plex Sans KR", "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--mono:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace}[data-theme=light]{--bg:#fafafb;--surface:#fff;--surface-2:#f4f4f7;--surface-3:#ebebf0;--border:#d8d8e0;--border-soft:#e8e8ee;--text:#15151b;--text-mute:#5d5d6a;--text-dim:#9999a3;--accent:#7c5cf2;--accent-2:#6244e3;--accent-soft:#ece7ff;--accent-glow:#7c5cf229;--success:#15a872;--warn:#c08a00;--danger:#dc4747;--shadow:0 1px 0 #00000005 inset, 0 4px 16px #0f0f1e0f;--shadow-lg:0 1px 0 #00000005 inset, 0 18px 48px #0f0f1e1f;--topbar-bg:#fafafbd9}[data-theme=light] ::-webkit-scrollbar-thumb{border:2px solid var(--bg);background:#cdcdd6}[data-theme=light] ::-webkit-scrollbar-thumb:hover{background:#b6b6c2}[data-theme=light] .list__row--head{background:#00000006}[data-theme=light] .subm__thumb--code{color:#6244e3;background:linear-gradient(135deg,#efeaff 0%,#e3dcff 100%)}[data-theme=light] .subm__thumb--img{color:var(--text-mute);background:repeating-linear-gradient(45deg,#eef0f5 0 6px,#e3e6ed 6px 12px)}[data-theme=light] .subm__thumb--pdf{color:#a06600;background:linear-gradient(135deg,#fff3d8 0%,#ffe9b8 100%)}[data-theme=light] .btn--primary{color:#fff}[data-theme=light] .btn:hover{border-color:#bdbdc7}[data-theme=light] .topbar__kbd{background:#fff}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;padding:0}body{letter-spacing:-.005em;font-size:14px;line-height:1.5}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:0;padding:0}input,textarea,select{font:inherit;color:inherit}::selection{background:var(--accent-soft);color:var(--accent-2)}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{border:2px solid var(--bg);background:#2a2a37;border-radius:8px}::-webkit-scrollbar-thumb:hover{background:#3a3a4a}.app{background:var(--bg);grid-template-columns:240px 1fr;min-height:100vh;display:grid}.app--noshell{grid-template-columns:1fr}.side{background:linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);border-right:1px solid var(--border-soft);flex-direction:column;gap:4px;height:100vh;padding:20px 14px;display:flex;position:sticky;top:0}.side__brand{align-items:center;gap:10px;padding:6px 8px 16px;display:flex}.side__logo{background:radial-gradient(120% 120% at 0% 0%, var(--accent) 0%, #6d4dd6 60%, #3a2575 100%);color:#0b0b0f;width:30px;height:30px;box-shadow:0 4px 12px var(--accent-glow), inset 0 1px 0 #ffffff40;border-radius:8px;place-items:center;font-size:14px;font-weight:700;display:grid}.side__brandname{letter-spacing:-.01em;font-size:15px;font-weight:600}.side__brandsub{color:var(--text-dim);font-size:11px;font-family:var(--mono);margin-top:1px}.side__section{color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em;padding:14px 8px 6px;font-size:11px;font-weight:500}.side__item{color:var(--text-mute);cursor:pointer;border-radius:8px;align-items:center;gap:10px;padding:8px 10px;font-size:13.5px;font-weight:500;transition:background .12s,color .12s;display:flex}.side__item:hover{background:var(--surface);color:var(--text)}.side__item.is-active{background:var(--surface-2);color:var(--text)}.side__item.is-active .side__icon{color:var(--accent)}.side__icon{width:16px;height:16px;color:var(--text-dim);flex-shrink:0}.side__count{color:var(--text-dim);font-size:11px;font-family:var(--mono);background:var(--surface-2);border-radius:5px;margin-left:auto;padding:2px 6px}.side__item.is-active .side__count{background:var(--accent-soft);color:var(--accent-2)}.side__user{background:var(--surface);border:1px solid var(--border-soft);border-radius:10px;align-items:center;gap:10px;margin-top:auto;padding:10px;display:flex}.side__avatar{background:var(--accent-soft);width:30px;height:30px;color:var(--accent-2);border-radius:50%;flex-shrink:0;place-items:center;font-size:12px;font-weight:600;display:grid}.side__username{font-size:13px;font-weight:500;line-height:1.2}.side__userrole{color:var(--text-dim);font-size:11px;font-family:var(--mono);margin-top:2px}.topbar{border-bottom:1px solid var(--border-soft);background:var(--topbar-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:5;align-items:center;gap:16px;padding:14px 28px;display:flex;position:sticky;top:0}.topbar__crumb{color:var(--text-mute);align-items:center;gap:6px;font-size:13px;display:flex}.topbar__crumb b{color:var(--text);font-weight:600}.topbar__sep{color:var(--text-dim)}.topbar__spacer{flex:1}.topbar__search{background:var(--surface);border:1px solid var(--border-soft);width:280px;color:var(--text-mute);border-radius:8px;align-items:center;gap:8px;padding:7px 12px;font-size:13px;display:flex}.topbar__search:focus-within{border-color:var(--accent);background:var(--surface-2)}.topbar__search input{color:var(--text);background:0 0;border:0;outline:0;flex:1;min-width:0}.topbar__search input::placeholder{color:var(--text-dim)}.topbar__kbd{font-family:var(--mono);color:var(--text-dim);border:1px solid var(--border);background:var(--bg);border-radius:4px;padding:2px 5px;font-size:11px}.topbar__icon-btn{width:34px;height:34px;color:var(--text-mute);border:1px solid #0000;border-radius:8px;place-items:center;display:grid;position:relative}.topbar__icon-btn:hover{background:var(--surface);color:var(--text)}.topbar__dot{background:var(--accent);width:7px;height:7px;box-shadow:0 0 0 2px var(--bg);border-radius:50%;position:absolute;top:7px;right:7px}.main{width:100%;max-width:1280px;padding:28px 32px}.main--narrow{max-width:920px}.page-head{justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:24px;display:flex}.page-title{letter-spacing:-.015em;margin:0;font-size:24px;font-weight:600;line-height:1.2}.page-sub{color:var(--text-mute);margin-top:6px;font-size:14px}.page-actions{align-items:center;gap:8px;display:flex}.btn{border:1px solid var(--border);background:var(--surface);color:var(--text);white-space:nowrap;border-radius:8px;align-items:center;gap:6px;padding:8px 14px;font-size:13.5px;font-weight:500;transition:background .12s,border-color .12s,transform 40ms;display:inline-flex}.btn:hover{background:var(--surface-2);border-color:#3a3a4a}.btn:active{transform:translateY(1px)}.btn--primary{background:var(--accent);color:#0b0b0f;border-color:#0000;font-weight:600}.btn--primary:hover{background:var(--accent-2)}.btn--ghost{color:var(--text-mute);background:0 0;border-color:#0000}.btn--ghost:hover{background:var(--surface);color:var(--text)}.btn--danger{color:var(--danger);border-color:#0000}.btn--danger:hover{background:#f8717114;border-color:#f8717133}.btn--sm{border-radius:6px;padding:5px 10px;font-size:12.5px}.btn--icon{justify-content:center;width:32px;height:32px;padding:7px}.card{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);overflow:hidden}.card__head{border-bottom:1px solid var(--border-soft);justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;display:flex}.card__title{letter-spacing:-.005em;margin:0;font-size:14px;font-weight:600}.card__body{padding:18px}.card__foot{border-top:1px solid var(--border-soft);background:#00000026;padding:12px 18px}.stat-grid{grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:24px;display:grid}.stat{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);padding:16px 18px}.stat__label{color:var(--text-mute);align-items:center;gap:6px;font-size:12px;font-weight:500;display:flex}.stat__value{letter-spacing:-.02em;font-feature-settings:"tnum";margin-top:6px;font-size:28px;font-weight:600;line-height:1}.stat__sub{color:var(--text-dim);font-size:12px;font-family:var(--mono);margin-top:4px}.stat__sub--up{color:var(--success)}.stat__sub--warn{color:var(--warn)}.list{background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--radius);overflow:hidden}.list__row{border-bottom:1px solid var(--border-soft);cursor:pointer;align-items:center;gap:16px;padding:14px 18px;transition:background .1s;display:grid}.list__row:last-child{border-bottom:0}.list__row:hover{background:var(--surface-2)}.list__row--head{text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);cursor:default;background:#0003;padding:10px 18px;font-size:11px;font-weight:500}.list__row--head:hover{background:#0003}.subm-row{grid-template-columns:1.4fr .7fr .9fr .8fr .6fr 28px}.subm-row--student{grid-template-columns:1.6fr .9fr 1fr .7fr 28px}.subm__title{align-items:center;gap:12px;min-width:0;display:flex}.subm__thumb{background:var(--surface-2);border:1px solid var(--border-soft);width:38px;height:38px;color:var(--text-mute);font-family:var(--mono);border-radius:8px;flex-shrink:0;place-items:center;font-size:11px;font-weight:600;display:grid}.subm__thumb--code{color:#a78bfa;background:linear-gradient(135deg,#1a1a2e 0%,#0f0f1a 100%)}.subm__thumb--img{color:var(--text-mute);background:repeating-linear-gradient(45deg,#1a1a2e 0 6px,#15151b 6px 12px)}.subm__thumb--pdf{color:#fbbf24;background:linear-gradient(135deg,#2a1a1a 0%,#1f0f0f 100%)}.subm__name{color:var(--text);white-space:nowrap;text-overflow:ellipsis;margin:0 0 2px;font-size:13.5px;font-weight:500;overflow:hidden}.subm__meta{color:var(--text-mute);font-size:12px;font-family:var(--mono);gap:10px;display:flex}.subm__meta span{align-items:center;gap:4px;display:inline-flex}.pill{font-size:11.5px;font-weight:500;font-family:var(--mono);letter-spacing:0;white-space:nowrap;border-radius:6px;align-items:center;gap:5px;padding:3px 8px;display:inline-flex}.pill__dot{background:currentColor;border-radius:50%;width:6px;height:6px}.pill--pending{color:#fcd34d;background:#fcd34d1a}.pill--reviewed{color:#6ee7b7;background:#6ee7b71a}.pill--needs{color:#f87171;background:#f871711a}.pill--draft{background:var(--surface-2);color:var(--text-mute)}.pill--new{background:var(--accent-soft);color:var(--accent-2)}.stars{color:var(--text-dim);gap:2px;display:inline-flex}.stars svg{width:13px;height:13px}.stars .on{color:var(--warn)}.field{flex-direction:column;gap:6px;margin-bottom:14px;display:flex}.field__label{color:var(--text-mute);letter-spacing:0;font-size:12px;font-weight:500}.field__hint{color:var(--text-dim);margin-top:-2px;font-size:11.5px}.input,.textarea,.select{background:var(--surface-2);border:1px solid var(--border);color:var(--text);border-radius:8px;outline:0;padding:9px 12px;font-size:13.5px;transition:border-color .12s,background .12s}.input:focus,.textarea:focus,.select:focus{border-color:var(--accent);background:var(--surface-3);box-shadow:0 0 0 3px var(--accent-glow)}.textarea{resize:vertical;min-height:84px;font-family:var(--sans);line-height:1.55}.textarea--code{font-family:var(--mono);font-size:13px}.drop{border:1.5px dashed var(--border);border-radius:var(--radius);text-align:center;background:var(--surface);padding:36px 20px;transition:border-color .15s,background .15s}.drop.is-active{border-color:var(--accent);background:var(--accent-soft)}.drop__icon{background:var(--surface-2);width:42px;height:42px;color:var(--accent);border-radius:10px;place-items:center;margin:0 auto 12px;display:grid}.drop__title{margin-bottom:4px;font-size:15px;font-weight:600}.drop__sub{color:var(--text-mute);font-size:13px}.drop__formats{flex-wrap:wrap;justify-content:center;gap:6px;margin-top:14px;display:inline-flex}.drop__chip{font-family:var(--mono);color:var(--text-dim);border:1px solid var(--border-soft);border-radius:5px;padding:3px 8px;font-size:11px}.code-block{border:1px solid var(--border-soft);background:#0a0a10;border-radius:10px;overflow:hidden}.code-block__head{border-bottom:1px solid var(--border-soft);font-family:var(--mono);color:var(--text-mute);background:#ffffff05;justify-content:space-between;align-items:center;padding:8px 12px;font-size:11.5px;display:flex}.code-block__name{align-items:center;gap:8px;display:flex}.code-block__lang{background:var(--surface-2);color:var(--accent-2);border-radius:4px;padding:2px 6px;font-size:10.5px}.code-block__body{font-family:var(--mono);padding:14px 0;font-size:12.5px;line-height:1.7;display:flex;overflow-x:auto}.code-line{min-height:21px;padding:0 16px 0 0;display:flex;position:relative}.code-line.is-comment{color:#6b7280}.code-line__num{text-align:right;width:42px;color:var(--text-dim);-webkit-user-select:none;user-select:none;flex-shrink:0;padding-right:14px}.code-line__txt{white-space:pre;color:#d4d4d8;flex:1}.code-line:hover{background:#a78bfa0a}.code-line.has-comment{box-shadow:inset 2px 0 0 var(--warn);background:#fcd34d0a}.code-line__add{opacity:0;background:var(--accent);color:#0b0b0f;cursor:pointer;border-radius:4px;place-items:center;width:18px;height:18px;font-size:13px;font-weight:600;transition:opacity .1s;display:grid;position:absolute;top:1px;left:24px}.code-line:hover .code-line__add{opacity:1}.tok-kw{color:#c084fc}.tok-fn{color:#7dd3fc}.tok-str{color:#86efac}.tok-num{color:#fcd34d}.tok-com{color:#71717a;font-style:italic}.tok-pun{color:#a1a1aa}.tok-var{color:#e4e4e7}.img-preview{border:1px solid var(--border-soft);height:340px;color:var(--text-dim);font-family:var(--mono);background:repeating-linear-gradient(45deg,#15151b 0 10px,#1a1a22 10px 20px);border-radius:10px;place-items:center;font-size:12px;display:grid;position:relative;overflow:hidden}.img-preview__pin{background:var(--warn);color:#0b0b0f;cursor:pointer;border-radius:50%;place-items:center;width:24px;height:24px;font-size:12px;font-weight:700;transition:transform .1s;display:grid;position:absolute;box-shadow:0 2px 8px #0006,0 0 0 3px #fcd34d26}.img-preview__pin:hover{transform:scale(1.15)}.img-preview__pin.is-active{background:var(--accent);color:#0b0b0f;box-shadow:0 2px 8px #0006, 0 0 0 4px var(--accent-glow)}.comment{border-bottom:1px solid var(--border-soft);gap:10px;padding:12px 0;display:flex}.comment:last-child{border-bottom:0}.comment__avatar{background:var(--accent-soft);width:28px;height:28px;color:var(--accent-2);border-radius:50%;flex-shrink:0;place-items:center;font-size:11px;font-weight:600;display:grid}.comment__avatar--teacher{color:#fff;background:linear-gradient(135deg,#7c3aed,#a78bfa)}.comment__head{align-items:center;gap:8px;margin-bottom:3px;font-size:12px;display:flex}.comment__name{color:var(--text);font-weight:600}.comment__role{background:var(--accent-soft);color:var(--accent-2);font-size:10px;font-family:var(--mono);letter-spacing:.02em;border-radius:4px;padding:1px 5px;font-weight:500}.comment__time{color:var(--text-dim);font-family:var(--mono)}.comment__body{color:var(--text);font-size:13.5px;line-height:1.55}.comment__line{font-family:var(--mono);color:var(--text-dim);background:var(--surface-2);border-radius:4px;margin-left:6px;padding:1px 5px;font-size:11px}.tabs{border-bottom:1px solid var(--border-soft);gap:2px;margin-bottom:20px;display:flex}.tab{color:var(--text-mute);cursor:pointer;border-bottom:2px solid #0000;margin-bottom:-1px;padding:10px 14px;font-size:13px;font-weight:500}.tab:hover{color:var(--text)}.tab.is-active{color:var(--text);border-color:var(--accent)}.sidepanel{background:var(--surface);border-left:1px solid var(--border);z-index:50;width:480px;box-shadow:var(--shadow-lg);flex-direction:column;animation:.25s cubic-bezier(.2,.8,.2,1) slideIn;display:flex;position:fixed;top:0;bottom:0;right:0}@keyframes slideIn{0%{transform:translate(100%)}to{transform:translate(0)}}.sidepanel__head{border-bottom:1px solid var(--border-soft);justify-content:space-between;align-items:center;padding:18px 22px;display:flex}.sidepanel__body{flex:1;padding:22px;overflow:auto}.sidepanel__foot{border-top:1px solid var(--border-soft);justify-content:flex-end;gap:10px;padding:14px 22px;display:flex}.modal-backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:40;background:#0009;place-items:center;animation:.2s fadeIn;display:grid;position:fixed;inset:0}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal{background:var(--surface);border:1px solid var(--border);width:560px;max-width:92vw;box-shadow:var(--shadow-lg);border-radius:14px;flex-direction:column;animation:.2s cubic-bezier(.2,.8,.2,1) popIn;display:flex}@keyframes popIn{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.modal__head{border-bottom:1px solid var(--border-soft);justify-content:space-between;align-items:center;padding:18px 22px;display:flex}.modal__body{max-height:60vh;padding:20px 22px;overflow:auto}.modal__foot{border-top:1px solid var(--border-soft);justify-content:flex-end;gap:10px;padding:14px 22px;display:flex}.login-stage{grid-template-columns:1fr 1fr;min-height:100vh;display:grid}.login-aside{border-right:1px solid var(--border-soft);background:radial-gradient(circle at 20% 80%,#a78bfa2e 0%,#0000 50%),radial-gradient(circle at 80% 20%,#a78bfa1a 0%,#0000 50%),linear-gradient(#0e0e15 0%,#0b0b0f 100%);flex-direction:column;justify-content:space-between;padding:48px;display:flex;position:relative;overflow:hidden}.login-form-wrap{place-items:center;padding:48px;display:grid}.login-form{width:380px;max-width:100%}.login-headline{letter-spacing:-.025em;margin:0 0 16px;font-size:40px;font-weight:600;line-height:1.1}.login-headline em{color:var(--accent);font-style:normal}.login-tag{color:var(--text-mute);font-size:14px;font-family:var(--mono)}.login-feat{flex-direction:column;gap:14px;margin-top:32px;display:flex}.login-feat__row{color:var(--text-mute);align-items:flex-start;gap:12px;font-size:14px;display:flex}.login-feat__check{background:var(--accent-soft);width:22px;height:22px;color:var(--accent-2);border-radius:6px;flex-shrink:0;place-items:center;margin-top:1px;display:grid}.row{align-items:center;gap:8px;display:flex}.col{flex-direction:column;gap:8px;display:flex}.muted{color:var(--text-mute)}.dim{color:var(--text-dim)}.mono{font-family:var(--mono)}.divider{background:var(--border-soft);height:1px;margin:14px 0}.spacer{flex:1}.mobile-nav{z-index:10;background:var(--surface);border-top:1px solid var(--border-soft);padding:6px 0 env(safe-area-inset-bottom,6px);display:none;position:fixed;bottom:0;left:0;right:0}.mobile-nav__items{justify-content:space-around;align-items:center;display:flex}.mobile-nav__item{color:var(--text-mute);border-radius:8px;flex-direction:column;align-items:center;gap:2px;padding:6px 12px;font-size:10px;font-weight:500;text-decoration:none;transition:color .12s;display:flex}.mobile-nav__item:hover,.mobile-nav__item.is-active{color:var(--text)}.mobile-nav__item.is-active svg{color:var(--accent)}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width:1024px){.stat-grid{grid-template-columns:repeat(2,1fr)}.main{padding:20px}.login-stage{grid-template-columns:1fr}.login-aside{display:none}.login-form-wrap{min-height:100vh}}@media (max-width:768px){.app{grid-template-columns:1fr;padding-bottom:60px}.side{display:none}.mobile-nav{display:block}.topbar{padding:10px 16px}.topbar__search{display:none}.main{padding:16px}.main--narrow{max-width:100%}.page-head{flex-direction:column;align-items:flex-start;gap:12px}.page-actions{width:100%}.page-actions .btn{flex:1;justify-content:center}.stat-grid{grid-template-columns:repeat(2,1fr);gap:8px}.stat{padding:12px 14px}.stat__value{font-size:22px}.grid-responsive{flex-direction:column!important;display:flex!important}.subm-row,.subm-row--student{grid-template-columns:1fr auto!important}.subm-row .mono,.subm-row--student .mono,.subm-row>div:nth-child(2),.subm-row>div:nth-child(3),.subm-row--student>div:nth-child(2),.subm-row--student>div:nth-child(3),.list__row--head{display:none}.code-block__body{font-size:11.5px}.code-line__num{width:32px;padding-right:8px}.drop{padding:24px 16px}.drop__formats{gap:4px}.tabs{-webkit-overflow-scrolling:touch;flex-wrap:nowrap;overflow-x:auto}.tab{white-space:nowrap;flex-shrink:0}.card__foot .row{flex-wrap:wrap;gap:6px}.card__foot .btn{padding:6px 10px;font-size:12px}}.attachment-list{flex-wrap:wrap;gap:8px;display:flex}.attachment-item{border:1px solid var(--border-soft);background:var(--surface-2);cursor:pointer;border-radius:8px;align-items:center;gap:6px;padding:8px 12px;font-size:13px;transition:border-color .15s,background .15s;display:flex}.attachment-item:hover{border-color:var(--primary);background:#6366f10d}.attachment-item:disabled{opacity:.6;cursor:wait}.attachment-item__name{text-overflow:ellipsis;white-space:nowrap;max-width:180px;font-weight:500;overflow:hidden}.attachment-item__size,.attachment-item__loading{color:var(--text-mute);font-size:11px}.attachment-preview-overlay{z-index:9999;background:#000000b3;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.attachment-preview{background:var(--surface-1);border-radius:12px;flex-direction:column;max-width:90vw;max-height:90vh;display:flex;overflow:hidden;box-shadow:0 20px 60px #0000004d}.attachment-preview__head{border-bottom:1px solid var(--border-soft);justify-content:space-between;align-items:center;padding:12px 16px;font-size:13px;font-weight:500;display:flex}.attachment-preview__body{justify-content:center;align-items:center;padding:16px;display:flex;overflow:auto}.attachment-preview__body img{border-radius:6px;max-width:100%;max-height:70vh}.attachment-preview__foot{border-top:1px solid var(--border-soft);justify-content:flex-end;padding:12px 16px;display:flex}