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var(--line);border-radius:999px;background:var(--surface);color:var(--ink);cursor:pointer;transition:background .14s ease,border-color .14s ease}.notifications-drawer__close:hover{background:var(--bg-canvas-2);border-color:var(--line-strong)}.notifications-list{display:grid;gap:var(--space-3)}.notification-card{position:relative;display:grid;grid-template-columns:auto minmax(0,1fr);gap:var(--space-3);width:100%;padding:var(--space-4);border:1px solid var(--line);border-radius:16px;background:var(--surface);color:var(--ink);cursor:pointer;text-align:left;box-shadow:0 1px 2px #0f172a0a;transition:background .14s ease,border-color .14s ease,box-shadow .14s ease,transform .14s ease}.notification-card:hover{background:var(--bg-canvas);border-color:var(--line-strong);box-shadow:var(--shadow-card);transform:translateY(-1px)}.notification-card--unread{background:color-mix(in srgb,var(--info-text) 5%,var(--surface));border-color:color-mix(in srgb,var(--info-text) 32%,var(--line))}.notification-card__icon{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:999px;background:var(--bg-canvas-2);color:var(--ink);flex:0 0 auto}.notification-card__content{display:grid;gap:var(--space-2);min-width:0}.notification-card__topline{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-3);padding-right:12px}.notification-card__title{font-size:.95rem;font-weight:800;line-height:1.3}.notification-card time{color:var(--muted);font-size:.74rem;line-height:1.3;white-space:nowrap}.notification-card__body{display:grid;gap:4px;color:var(--muted-strong);font-size:.9rem;line-height:1.45}.notification-card__line{display:block}.notification-card__line strong{color:var(--ink);font-weight:800}.notification-card__dot{position:absolute;top:14px;right:14px;width:8px;height:8px;border-radius:999px;background:var(--info-text)}.notifications-empty{min-height:220px;display:grid;place-items:center;align-content:center;gap:var(--space-3);padding:var(--space-8);border:1px dashed var(--line);border-radius:16px;background:var(--bg-canvas);color:var(--muted);text-align:center}@keyframes notification-drawer-in{0%{transform:translate(24px);opacity:.8}to{transform:translate(0);opacity:1}}.drawer-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--space-3)}.drawer-metrics span{padding:var(--space-4);border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface-muted);color:var(--muted);font-size:.8rem}.drawer-metrics strong{display:block;color:var(--ink);font-size:1.3rem}.drawer-section{display:grid;gap:var(--space-3)}.drawer-section h3{margin:0;font-size:.96rem}.insight-list{display:grid;gap:var(--space-2);padding:0;margin:0;list-style:none}.insight-list li{padding:var(--space-3);border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface-muted);color:var(--muted-strong);font-size:.88rem}.filter-banner{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);padding:var(--space-3) var(--space-5);border-radius:var(--radius-md);background:var(--warning-bg);border:1px solid var(--warning-text);flex-wrap:wrap}.filter-banner__content{display:flex;align-items:center;gap:var(--space-2);font-size:.9rem;color:var(--warning-text)}.filter-banner__content svg{width:16px;height:16px;flex-shrink:0}.filter-banner__content strong{font-weight:700}.timeline,.checklist,.submission-list,.student-list{display:grid;gap:var(--space-3);padding:0;margin:0;list-style:none}.timeline__item{display:grid;grid-template-columns:14px 1fr;gap:var(--space-4);align-items:start;padding:var(--space-3) 0;border-bottom:1px solid var(--line);transition:transform var(--motion-fast) ease,opacity var(--motion-fast) ease}.timeline__item:last-child{border-bottom:none}.timeline__item strong{display:block;color:var(--ink);font-size:.93rem;font-weight:600}.timeline__item p{margin:var(--space-1) 0 0;font-size:.85rem}.timeline__marker{width:12px;height:12px;border-radius:50%;background:var(--danger-bg);border:2px solid var(--danger-text);margin-top:6px;box-shadow:0 0 0 6px #b91c1c0f}.timeline__marker--good{background:var(--success-bg);border-color:var(--success-text);box-shadow:0 0 0 6px #0478570f}.checklist{gap:var(--space-2)}.checklist li{font-size:.92rem;color:var(--muted-strong);line-height:1.6;display:flex;align-items:flex-start;gap:var(--space-2)}.checklist li:before{content:"";flex-shrink:0;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--ink);opacity:.4}.checklist li strong{color:var(--ink)}.homework-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:var(--space-4)}.homework-section{display:grid;gap:var(--space-3)}.homework-section__heading{display:inline-flex;align-items:center;gap:var(--space-2);margin:0;color:var(--ink);font-size:1.08rem;font-weight:700;letter-spacing:-.02em}.homework-section__heading span{width:10px;height:10px;border-radius:50%;background:var(--ink);box-shadow:0 0 0 6px #0a0d110f}.homework-section__heading[data-tone=warning] span{background:var(--warning-text);box-shadow:0 0 0 6px #92400e14}.homework-section__heading[data-tone=success] span{background:var(--success-text);box-shadow:0 0 0 6px #04785714}.homework-section__heading[data-tone=danger]{color:var(--danger-text)}.homework-section__heading[data-tone=danger] span{background:var(--danger-text);box-shadow:0 0 0 6px #b91c1c14}.homework-card{display:grid;gap:var(--space-3);padding:var(--space-5) var(--space-5);border-radius:var(--radius-md);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-card);transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease}.homework-card:hover{border-color:var(--ink);box-shadow:var(--shadow-pop);transform:translateY(-2px);background:linear-gradient(180deg,#fff,#f8fafcf2)}.homework-card--locked{opacity:.72;cursor:not-allowed;border-color:#b91c1c3d;background:linear-gradient(180deg,#f8fafcfa,#f1f5f9f2)}.homework-card__header{display:flex;justify-content:space-between;align-items:flex-start;gap:var(--space-3)}.homework-card__header h2{font-size:1.02rem;font-weight:700;letter-spacing:-.012em}.homework-card p{font-size:.88rem;margin:0}.tag{display:inline-flex;align-items:center;gap:4px;padding:5px 10px;border-radius:999px;font-size:.72rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;border:1px solid transparent;white-space:nowrap}.tag svg{width:12px;height:12px}.tag--success{background:var(--success-bg);color:var(--success-text)}.tag--warning{background:var(--warning-bg);color:var(--warning-text)}.tag--danger{background:var(--danger-bg);color:var(--danger-text)}.tag--info{background:var(--info-bg);color:var(--info-text)}.tag--muted{background:var(--bg-canvas-2);color:var(--muted-strong)}.difficulty-badge{display:inline-flex;align-items:center;gap:4px;padding:5px 12px;border-radius:999px;background:var(--ink);color:var(--primary-text);font-size:.72rem;font-weight:600;letter-spacing:.02em;white-space:nowrap}.difficulty-badge svg{width:12px;height:12px}.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-4)}.field{display:grid;gap:var(--space-2)}.filter-panel{display:grid;gap:var(--space-4)}.field span{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:600}.field span svg{width:14px;height:14px;flex:0 0 14px;vertical-align:-2px;margin-right:6px}.field input,.field select,.field textarea,.custom-select-trigger{width:100%;padding:11px 14px;border-radius:var(--radius-md);border:1px solid var(--line);background:var(--surface);color:var(--ink);outline:none;transition:border-color .16s ease,box-shadow .16s ease;font-size:.93rem}.field textarea{font-family:inherit;resize:vertical;min-height:92px;line-height:1.55}.field input:focus,.field select:focus,.field textarea:focus,.custom-select-trigger:focus{border-color:var(--ink);box-shadow:0 0 0 3px var(--focus-ring)}.field input::placeholder,.field textarea::placeholder{color:var(--subtle)}.auth-layout{display:grid;grid-template-columns:minmax(0,440px);justify-content:center;align-items:center;min-height:min(720px,calc(100vh - 180px));max-width:520px;margin:0 auto;padding:var(--space-8) var(--space-4)}.form-card{display:grid;gap:var(--space-4)}.auth-card-header{display:grid;gap:var(--space-2)}.auth-card-header h1{margin:0;font-size:clamp(1.55rem,4vw,2rem);line-height:1.2;color:var(--ink);letter-spacing:0}.auth-card-header p{margin:0;color:var(--muted);line-height:1.55}.form-card h2{font-size:1.22rem}.form-error{color:var(--danger-text);margin:0;font-size:.88rem;padding:var(--space-3);background:var(--danger-bg);border-radius:var(--radius-sm)}.turnstile-field{display:grid;align-items:start;gap:var(--space-2);min-height:70px}.form-note{margin:0;font-size:.88rem}.auth-support-text{margin:0;font-size:.82rem;line-height:1.5;color:var(--muted)}.auth-support-text a{color:var(--ink);font-weight:600;text-decoration:underline;text-underline-offset:3px}.form-note a{color:var(--ink);font-weight:600;text-decoration:underline}.custom-select-trigger{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);cursor:pointer;font-family:inherit;text-align:left}.custom-select-trigger:disabled{cursor:not-allowed;color:var(--muted);background:var(--surface-muted)}.custom-select-trigger span{color:var(--ink);font-size:.93rem;font-weight:400;letter-spacing:0;text-transform:none}.custom-select-trigger svg{color:var(--muted);flex:0 0 auto;transition:transform .16s ease}.custom-select-trigger--open svg{transform:rotate(180deg)}.custom-select-field{position:relative}.custom-select-panel{display:grid;gap:var(--space-1);padding:var(--space-2);border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);box-shadow:var(--shadow-card)}.custom-select-panel--floating{position:absolute;z-index:70;top:calc(100% + 6px);left:0;right:0;box-shadow:var(--shadow-pop)}.custom-select-option{width:100%;border:0;border-radius:var(--radius-sm);background:transparent;color:var(--ink);cursor:pointer;font:inherit;padding:10px 12px;text-align:left;transition:background .14s ease,color .14s ease}.custom-select-option:hover,.custom-select-option--selected{background:var(--bg-canvas);color:var(--ink)}.grade-unspecified-row{margin-top:var(--space-2)}.homework-grade-notice{color:var(--muted-strong);font-weight:700}.saved-task-filter-button{transition:background .14s ease,border-color .14s ease,color .14s ease,box-shadow .14s ease}.saved-task-filter-button svg{color:currentColor}.saved-task-filter-button--active,.saved-task-filter-button--active:hover,.saved-task-filter-button--active:focus-visible{border-color:#e11d483d;background:#ffe4e6b8;color:#be123c;box-shadow:0 0 0 3px #ffe4e6a8}.loader-card{padding:var(--space-8);display:grid;gap:var(--space-4)}.loader-card__header{display:flex;align-items:center;gap:var(--space-4)}.loader-card__copy{display:grid;gap:var(--space-1)}.loader-card__copy strong{color:var(--ink);font-size:1rem;letter-spacing:-.02em}.loader-card p{color:var(--muted);margin:0;font-size:.93rem}.loader-card__pulse{width:46px;height:46px;border-radius:14px;background:radial-gradient(circle at 35% 35%,rgba(255,255,255,.82),transparent 46%),linear-gradient(135deg,#2563eb29,#0f766e1f);border:1px solid rgba(15,23,42,.08);box-shadow:var(--shadow-card);animation:pulse-soft 1.8s ease-in-out infinite}.loader-card__skeleton{display:grid;gap:var(--space-3)}.loader-card__stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-3)}.skeleton{display:block;border-radius:999px;background:linear-gradient(90deg,#e5e7ebf2 20%,#fffffffa,#e5e7ebf2 80%);background-size:220% 100%;animation:shimmer 1.6s linear infinite}.skeleton--title{width:min(260px,58%);height:14px}.skeleton--card{height:82px;border-radius:var(--radius-md)}.skeleton--line{width:100%;height:12px}.skeleton--line-short{width:min(420px,74%)}.feedback-box{margin-top:var(--space-4);padding:var(--space-4) var(--space-5);border-radius:var(--radius-md);background:var(--bg-canvas);border:1px solid var(--line);display:flex;gap:var(--space-3);align-items:flex-start}.feedback-box__icon{width:36px;height:36px;border-radius:var(--radius-sm);background:var(--surface);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--ink)}.feedback-box__icon svg{width:18px;height:18px}.feedback-box__body{flex:1}.feedback-box strong{display:block;color:var(--ink);margin-bottom:var(--space-1);font-size:.93rem}.feedback-box p{margin:0;font-size:.88rem;color:var(--muted-strong)}.meter{height:12px;border-radius:999px;background:var(--bg-canvas-2);overflow:hidden;margin:var(--space-4) 0 var(--space-5);border:1px solid var(--line)}.meter__fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,#4b5563,#1f2937 55%,var(--ink));transition:width .32s ease;transform-origin:left center;animation:grow-x .88s cubic-bezier(.22,1,.36,1)}.submission-row,.student-list__item{display:flex;justify-content:space-between;gap:var(--space-4);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);background:var(--surface);border:1px solid var(--line);transition:border-color .14s ease,background .14s ease}.submission-row:hover{border-color:var(--line-strong);box-shadow:var(--shadow-card)}.submission-row strong,.student-list__item strong{color:var(--ink);font-size:.93rem;font-weight:600}.submission-row p,.student-list__item span{color:var(--muted);font-size:.82rem;margin:2px 0 0}.student-list__item{width:100%;text-align:left;cursor:pointer;flex-direction:column;gap:var(--space-1)}.student-list__item small{color:var(--muted);font-size:.78rem}.student-list__item--active{border-color:var(--ink);background:var(--bg-canvas)}.student-list__item--active strong{color:var(--ink)}.group-manager-panel{display:grid;gap:var(--space-4)}.group-create-card{display:grid;gap:var(--space-3);padding:var(--space-4);border:1px solid var(--line);border-radius:var(--radius-md);background:linear-gradient(135deg,rgba(37,99,235,.06),transparent 46%),var(--surface-muted)}.group-create-card .field-grid{grid-template-columns:minmax(0,1.1fr) minmax(240px,.9fr);align-items:start}.group-create-card .field-grid>.field{align-content:start}.group-workspace{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-3);align-items:start}.group-create-card__header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-3)}.group-create-card__header h3,.group-detail-card__header h3,.group-create-preview h3{margin:0;color:var(--ink);font-size:1.05rem}.group-create-card__header p,.group-detail-card__header p,.group-create-preview p{margin:6px 0 0;color:var(--muted);font-size:.9rem}.group-create-card__summary{min-width:108px;padding:var(--space-3);border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface);text-align:center}.group-create-card__summary strong{display:block;color:var(--ink);font-size:1.4rem;line-height:1}.group-create-card__summary span{display:block;margin-top:6px;color:var(--muted);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em}.group-create-card__tools{display:flex;gap:var(--space-2);flex-wrap:wrap;align-items:end;justify-content:space-between}.group-create-card__search{flex:1 1 260px;margin:0}.group-create-card__bulk-actions{display:flex;gap:var(--space-2);flex-wrap:wrap}.group-create-card__footer{display:grid;gap:var(--space-3)}.group-create-card__selection{display:grid;gap:var(--space-2);padding:var(--space-3);border:1px solid var(--line);border-radius:var(--radius-md);background:#ffffffd1}.group-create-card__selection>span{color:var(--muted-strong);font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.group-create-card__selection-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:var(--space-2)}.group-create-card__selection-list small{color:var(--muted);font-size:.86rem}.group-create-card__selection-item{display:grid;gap:4px;padding:var(--space-3);border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface)}.group-create-card__selection-item strong{color:var(--ink)}.group-create-card__selection-item small{color:var(--muted);font-size:.8rem}.student-link-card{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:var(--space-3);padding:var(--space-4);border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface-muted)}.student-link-card__field{min-width:0}.student-link-card__field input{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.student-link-card__button{min-height:44px;white-space:nowrap}.student-link-feedback{display:inline-flex;align-items:center;gap:var(--space-2);width:fit-content;margin:var(--space-3) 0 0;padding:9px 12px;border-radius:var(--radius-sm);font-size:.88rem;font-weight:700}.student-link-feedback--success{border:1px solid color-mix(in srgb,var(--success-text) 22%,var(--line));background:var(--success-bg);color:var(--success-text)}.student-link-feedback--error{border:1px solid color-mix(in srgb,var(--danger-text) 22%,var(--line));background:var(--danger-bg);color:var(--danger-text)}.group-member-picker{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:var(--space-2);max-height:190px;overflow:auto;padding-right:4px}.group-member-picker--panel{padding:var(--space-2);border:1px solid var(--line);border-radius:var(--radius-md);background:#fffc}.group-create-preview{display:grid;gap:var(--space-3);padding:var(--space-4);border:1px solid var(--line);border-radius:var(--radius-md);background:var(--surface)}.group-create-preview__list{display:grid;gap:var(--space-2)}.group-create-preview__item{display:grid;gap:4px;padding:var(--space-3);border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface-muted)}.group-create-preview__item strong{color:var(--ink)}.group-create-preview__item span{color:var(--muted);font-size:.84rem}.group-shell{display:grid;grid-template-columns:minmax(180px,.85fr) minmax(0,1.25fr);gap:var(--space-3)}.group-card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--space-3)}.group-list,.group-member-list,.group-add-list{display:grid;gap:var(--space-2)}.group-list__item{display:grid;gap:2px;width:100%;padding:var(--space-3);border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);color:var(--muted);cursor:pointer;text-align:left}.group-list__item strong{color:var(--ink)}.group-list__item:hover,.group-list__item--active{border-color:var(--ink);background:var(--bg-canvas)}.student-group-card{width:100%;min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding:var(--space-4);border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);cursor:pointer;text-align:left;transition:background .16s ease,border-color .16s ease,box-shadow .16s ease}.student-group-card:hover{background:var(--bg-canvas);border-color:var(--line-strong);box-shadow:var(--shadow-card)}.student-group-card--selected{background:var(--surface-muted);border-color:var(--ink-soft);box-shadow:inset 0 0 0 1px #1f293714}.student-group-card__main-action{flex:1 1 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