@import "https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@500&display=swap";
:root{--navy:#0b0f2b;--navy-deep:#070a1e;--navy-soft:#141a40;--violet:#6c4ff5;--violet-light:#8e76ff;--violet-glow:#6c4ff524;--cyan:#3fe0d0;--gold:#ffb84d;--coral:#ff6f61;--green:#4ade80;--paper:#f7f6fb;--paper-warm:#fcfbf8;--white:#fff;--ink:#0b0f2b;--muted:#6b6e8c;--muted-light:#a8a4c9;--line:#e4e2f1;--line-soft:#e4e2f199;--accent:#6c4ff5;--accent-glow:#6c4ff524;--accent-line:#6c4ff54d;--font-d:"Space Grotesk", sans-serif;--font-b:"Inter", sans-serif;--font-m:"JetBrains Mono", monospace;--r-sm:8px;--r-md:14px;--r-lg:20px;--r-xl:24px;--r-pill:100px;--sidebar-w:240px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-b);background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased}h1,h2,h3,h4{font-family:var(--font-d);letter-spacing:-.02em}a{color:inherit;text-decoration:none}ul{list-style:none}button{cursor:pointer;background:0 0;border:none;font-family:inherit}input,select{font-family:inherit}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px}.shell{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-w);background:var(--navy-deep);z-index:60;border-right:1px solid #ffffff0f;flex-direction:column;flex-shrink:0;display:flex;position:fixed;top:0;bottom:0;left:0}.sb-logo{border-bottom:1px solid #ffffff0f;align-items:center;gap:9px;padding:22px 20px;display:flex}.logo-text{font-family:var(--font-d);color:#fff;font-size:17px;font-weight:700}.logo-text span{color:var(--cyan)}.sb-teacher{border-bottom:1px solid #ffffff0f;align-items:center;gap:10px;padding:16px 20px;display:flex}.t-avatar{background:linear-gradient(135deg, var(--gold), #e09000);width:36px;height:36px;font-family:var(--font-d);color:var(--navy-deep);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:flex}.t-name{color:#fff;font-size:13px;font-weight:600}.t-role{color:var(--gold);font-size:11px;font-family:var(--font-m);text-transform:uppercase;letter-spacing:.06em}.sb-nav{flex:1;padding:14px 10px;overflow-y:auto}.nav-label{font-family:var(--font-m);letter-spacing:.1em;text-transform:uppercase;color:var(--muted-light);margin:14px 0 6px;padding:0 10px;font-size:10px}.nav-item{border-radius:var(--r-md);color:#fff9;cursor:pointer;text-align:left;align-items:center;gap:10px;width:100%;padding:9px 12px;font-size:13.5px;font-weight:500;transition:background .15s,color .15s;display:flex;position:relative}.nav-item:hover{color:#fff;background:#ffffff0f}.nav-item.active{background:var(--violet-glow);color:var(--violet-light)}.nav-item.active:before{content:"";background:var(--violet);border-radius:0 3px 3px 0;width:3px;height:18px;position:absolute;top:50%;left:0;transform:translateY(-50%)}.nav-item svg{opacity:.8;flex-shrink:0;width:16px;height:16px}.sb-bottom{border-top:1px solid #ffffff0f;padding:12px 10px}.main{margin-left:var(--sidebar-w);flex-direction:column;flex:1;min-width:0;display:flex}.topbar{background:var(--white);border-bottom:1px solid var(--line);z-index:40;justify-content:space-between;align-items:center;gap:16px;min-height:64px;padding:0 36px;display:flex;position:sticky;top:0}.tb-left{align-items:center;gap:12px;display:flex}.tb-title{font-size:18px;font-weight:700}.back-btn{color:var(--muted);border-radius:var(--r-pill);background:var(--paper);border:1px solid var(--line);align-items:center;gap:6px;padding:7px 12px;font-size:13px;font-weight:600;transition:background .15s,color .15s;display:flex}.back-btn:hover{background:var(--white);color:var(--ink)}.breadcrumb{color:var(--muted);align-items:center;gap:6px;font-size:13px;display:flex}.breadcrumb a{color:var(--violet)}.tb-right{align-items:center;gap:10px;display:flex}.btn{border-radius:var(--r-pill);cursor:pointer;border:none;align-items:center;gap:6px;padding:9px 18px;font-size:13px;font-weight:700;transition:filter .15s,box-shadow .15s,transform .1s;display:inline-flex}.btn:active{transform:scale(.97)}.btn-primary{background:var(--violet);color:#fff}.btn-primary:hover{filter:brightness(1.1)}.btn-gold{background:var(--gold);color:var(--navy-deep)}.btn-gold:hover{filter:brightness(1.07)}.btn-green{background:var(--green);color:#166534}.btn-green:hover{filter:brightness(.95)}.btn-outline{color:var(--muted);border:1.5px solid var(--line);background:0 0}.btn-outline:hover{background:var(--paper);color:var(--ink)}.page-body{flex-direction:column;gap:32px;padding:32px 36px 80px;display:flex}.login-page{background:radial-gradient(circle at 12% 10%, #6c4ff52e, transparent 40%), radial-gradient(circle at 88% 90%, #3fe0d029, transparent 42%), var(--navy-deep);place-items:center;min-height:100vh;padding:24px;display:grid}.login-card{background:var(--white);border-radius:var(--r-xl);width:100%;max-width:420px;overflow:hidden;box-shadow:0 32px 64px #070a1e73}.login-head{background:var(--navy-deep);color:#fff;padding:26px 28px}.login-head h1{color:#fff;margin-top:10px;font-size:20px}.login-head p{color:var(--muted-light);margin-top:4px;font-size:13px}.login-body{padding:24px 28px 28px}.login-label{font-family:var(--font-m);letter-spacing:.1em;text-transform:uppercase;color:var(--muted-light);margin-bottom:10px;font-size:10px}.account-list{flex-direction:column;gap:10px;margin-bottom:18px;display:flex}.account-btn{border:1.5px solid var(--line);border-radius:var(--r-lg);background:var(--paper);text-align:left;align-items:center;gap:12px;padding:12px 14px;transition:border-color .15s,background .15s,transform .1s;display:flex}.account-btn:hover{border-color:var(--accent-line);background:var(--white);transform:translateY(-1px)}.account-av{width:40px;height:40px;font-family:var(--font-d);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:700;display:flex}.account-name{color:var(--ink);font-size:14px;font-weight:700}.account-role{color:var(--muted);font-size:11.5px;font-family:var(--font-m);text-transform:uppercase;letter-spacing:.05em}.login-note{color:var(--muted);font-size:12px;line-height:1.5}.dash-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px;display:flex}.dash-title{font-size:24px;font-weight:700}.dash-sub{color:var(--muted);margin-top:4px;font-size:13.5px}.filter-row{flex-wrap:wrap;gap:8px;display:flex}.filter-pill{border-radius:var(--r-pill);border:1.5px solid var(--line);background:var(--white);color:var(--muted);padding:8px 14px;font-size:13px;font-weight:600;transition:all .15s}.filter-pill:hover{border-color:var(--accent-line);color:var(--violet)}.filter-pill.active{background:var(--navy-deep);color:#fff;border-color:var(--navy-deep)}.students-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;display:grid}.student-card{background:var(--white);border:1px solid var(--line);border-radius:var(--r-xl);text-align:left;flex-direction:column;gap:16px;width:100%;padding:20px;transition:transform .18s,box-shadow .18s,border-color .18s;display:flex}.student-card:hover{border-color:var(--accent-line);transform:translateY(-3px);box-shadow:0 14px 30px #0b0f2b1a}.sc-top{align-items:center;gap:14px;display:flex}.sc-av{width:48px;height:48px;font-family:var(--font-d);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:17px;font-weight:700;display:flex}.sc-name{color:var(--ink);font-size:15.5px;font-weight:700}.sc-meta{color:var(--muted);align-items:center;gap:8px;font-size:12px;display:flex}.sc-dot{background:var(--muted-light);border-radius:50%;width:6px;height:6px}.sc-dot.on{background:var(--green)}.sc-progress{flex-direction:column;gap:10px;display:flex}.sc-prog-row{align-items:center;gap:10px;display:flex}.sc-prog-label{width:56px;color:var(--muted);flex-shrink:0;font-size:11.5px}.sc-bar{background:var(--line);border-radius:var(--r-pill);flex:1;height:6px;overflow:hidden}.sc-bar-fill{border-radius:var(--r-pill);height:100%}.sc-pct{text-align:right;width:34px;font-family:var(--font-m);color:var(--ink);font-size:11px}.sc-foot{border-top:1px solid var(--line-soft);justify-content:space-between;align-items:center;padding-top:14px;display:flex}.sc-foot-meta{color:var(--muted);font-size:12px}.sc-foot-meta b{color:var(--ink)}.sc-teacher-chip{font-family:var(--font-m);border-radius:var(--r-pill);background:var(--accent-glow);color:var(--accent);border:1px solid var(--accent-line);padding:3px 8px;font-size:10px}.student-hero{background:linear-gradient(135deg, var(--navy-deep), var(--navy-soft));border-radius:var(--r-xl);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:24px;padding:28px 32px;display:flex;position:relative;overflow:hidden}.student-hero:before{content:"";background:radial-gradient(circle,#6c4ff54d 0%,#0000 70%);border-radius:50%;width:400px;height:400px;position:absolute;top:-200px;right:-100px}.sh-left{z-index:2;align-items:center;gap:18px;display:flex;position:relative}.sh-avatar{width:64px;height:64px;font-family:var(--font-d);color:#fff;border:3px solid #fff3;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:22px;font-weight:700;display:flex}.sh-name{color:#fff;font-size:22px;font-weight:700;font-family:var(--font-d);margin-bottom:4px}.sh-meta{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.sh-tag{font-family:var(--font-m);border-radius:var(--r-pill);color:#ffffffbf;background:#ffffff14;padding:4px 10px;font-size:11px}.sh-right{z-index:2;flex-wrap:wrap;gap:14px;display:flex;position:relative}.sh-stat{border-radius:var(--r-lg);text-align:center;background:#ffffff0f;border:1px solid #ffffff1a;min-width:90px;padding:14px 20px}.sh-stat-num{font-family:var(--font-d);color:#fff;font-size:24px;font-weight:700}.sh-stat-label{color:var(--muted-light);font-size:11px}.subj-switch{background:var(--white);border:1px solid var(--line);border-radius:var(--r-pill);flex-wrap:wrap;gap:4px;padding:4px;display:inline-flex}.ss-btn{border-radius:var(--r-pill);color:var(--muted);align-items:center;gap:5px;padding:7px 14px;font-size:13px;font-weight:600;transition:background .18s,color .18s;display:flex}.ss-btn .sdot{border-radius:50%;width:6px;height:6px}.ss-btn:hover{color:var(--ink);background:var(--paper)}.ss-btn.active{background:var(--navy-deep);color:#fff;box-shadow:0 2px 8px #0b0f2b33}.sec-hd{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:18px;display:flex}.sec-hd-left{align-items:center;gap:10px;display:flex}.sec-icon{border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;font-size:16px;display:flex}.sec-heading{color:var(--ink);font-size:16px;font-weight:700;font-family:var(--font-d)}.sec-badge{background:var(--accent-glow);color:var(--accent);font-family:var(--font-m);border-radius:var(--r-pill);border:1px solid var(--accent-line);padding:3px 8px;font-size:10.5px}.divider{background:var(--line);height:1px}.cards-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;display:grid}.sheet-card{background:var(--white);border:1px solid var(--line);border-radius:var(--r-xl);flex-direction:column;gap:14px;padding:20px;transition:transform .18s,box-shadow .18s,border-color .18s;display:flex;position:relative;overflow:hidden}.sheet-card:hover{border-color:var(--accent-line);transform:translateY(-2px);box-shadow:0 10px 24px #0b0f2b17}.card-top{justify-content:space-between;align-items:flex-start;display:flex}.card-thumb{background:var(--accent-glow);border-radius:11px;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:20px;display:flex}.card-title{color:var(--ink);font-size:14px;font-weight:700;font-family:var(--font-d);margin-bottom:4px;line-height:1.3}.card-concept{color:var(--muted);font-size:12px;line-height:1.4}.card-meta{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px;display:flex}.ctag{font-family:var(--font-m);border-radius:var(--r-pill);padding:3px 8px;font-size:10px}.ctag-chapter{color:var(--muted);background:#0b0f2b0f}.ctag-due{color:#8f5a00;background:#ffb84d24;border:1px solid #ffb84d4d}.ctag-done{color:#166534;background:#4ade8024;border:1px solid #4ade804d}.card-teacher-actions{gap:7px;margin-top:2px;display:flex}.cta-btn{border-radius:var(--r-md);flex:1;justify-content:center;align-items:center;gap:5px;padding:8px;font-size:12px;font-weight:700;transition:background .15s,color .15s;display:flex}.cta-btn-cw{background:var(--accent-glow);color:var(--accent);border:1px solid var(--accent-line)}.cta-btn-cw:hover{background:var(--violet);color:#fff}.cta-btn-hw{color:#8f5a00;background:#ffb84d1a;border:1px solid #ffb84d4d}.cta-btn-hw:hover{background:var(--gold);color:var(--navy-deep)}.cta-btn-remove{color:#b8351f;background:#ff6f6114;border:1px solid #ff6f6133}.cta-btn-remove:hover{background:var(--coral);color:#fff}.ring-wrap{flex-shrink:0;width:38px;height:38px;position:relative}.ring-wrap svg{transform:rotate(-90deg)}.ring-bg{fill:none;stroke:var(--line);stroke-width:3px}.ring-fill{fill:none;stroke-width:3px;stroke-linecap:round}.ring-pct{font-family:var(--font-m);color:var(--muted);justify-content:center;align-items:center;font-size:8.5px;display:flex;position:absolute;inset:0}.empty-state{background:var(--white);border:1.5px dashed var(--line);border-radius:var(--r-xl);text-align:center;flex-direction:column;grid-column:1/-1;align-items:center;gap:10px;padding:36px;display:flex}.empty-icon{opacity:.4;font-size:30px}.curr-shell{background:var(--white);border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden}.chapter-row{border-bottom:1px solid var(--line-soft)}.chapter-row:last-child{border-bottom:none}.chapter-trigger{text-align:left;align-items:center;gap:14px;width:100%;padding:18px 22px;transition:background .15s;display:flex}.chapter-trigger:hover,.chapter-row.open>.chapter-trigger{background:var(--paper)}.ch-num{font-family:var(--font-m);color:var(--muted-light);flex-shrink:0;width:24px;font-size:10.5px}.ch-icon{background:var(--accent-glow);border-radius:11px;flex-shrink:0;justify-content:center;align-items:center;width:38px;height:38px;font-size:18px;display:flex}.ch-info{flex:1;min-width:0}.ch-name{color:var(--ink);font-size:14.5px;font-weight:700;font-family:var(--font-d);margin-bottom:2px}.ch-meta{color:var(--muted);align-items:center;gap:8px;font-size:12px;display:flex}.ch-meta .dot{background:var(--muted-light);border-radius:50%;width:3px;height:3px}.ch-prog-wrap{flex-shrink:0;align-items:center;gap:8px;display:flex}.ch-pbar{background:var(--line);border-radius:var(--r-pill);width:76px;height:4px;overflow:hidden}.ch-pbar-fill{border-radius:var(--r-pill);background:linear-gradient(90deg, var(--accent), var(--violet-light));height:100%}.ch-pct{font-family:var(--font-m);color:var(--muted);min-width:28px;font-size:10.5px}.ch-arrow{background:var(--paper);border:1px solid var(--line);width:26px;height:26px;color:var(--muted);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;transition:transform .25s,background .15s,border-color .15s;display:flex}.chapter-row.open .ch-arrow{background:var(--accent-glow);border-color:var(--accent-line);color:var(--accent);transform:rotate(180deg)}.lessons-panel{background:var(--paper);max-height:0;transition:max-height .35s cubic-bezier(.4,0,.2,1);overflow:hidden}.chapter-row.open .lessons-panel{max-height:1600px}.lessons-inner{padding:14px 22px 20px}.lessons-hd{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:12px;display:flex}.lessons-lbl{font-family:var(--font-m);letter-spacing:.08em;text-transform:uppercase;color:var(--muted-light);font-size:10px}.lessons-list{flex-direction:column;gap:8px;display:flex}.lesson-row{background:var(--white);border:1px solid var(--line);border-radius:var(--r-lg);flex-wrap:wrap;align-items:center;gap:12px;padding:13px 16px;transition:border-color .15s;display:flex}.lesson-row:hover{border-color:var(--accent-line)}.l-badge{background:var(--accent-glow);border:1px solid var(--accent-line);width:30px;height:30px;font-family:var(--font-m);color:var(--accent);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;font-size:10.5px;display:flex}.l-info{flex:1;min-width:120px}.l-name{color:var(--ink);font-size:13.5px;font-weight:600}.l-concept{color:var(--muted);font-size:11.5px}.l-student-prog{flex-shrink:0;align-items:center;gap:6px;display:flex}.l-prog-bar{background:var(--line);border-radius:var(--r-pill);width:60px;height:4px;overflow:hidden}.l-prog-fill{border-radius:var(--r-pill);background:linear-gradient(90deg, var(--accent), var(--violet-light));height:100%}.l-prog-pct{font-family:var(--font-m);color:var(--muted);min-width:26px;font-size:10px}.l-status{font-family:var(--font-m);border-radius:var(--r-pill);flex-shrink:0;padding:3px 8px;font-size:10px}.st-done{color:#166534;background:#4ade8024;border:1px solid #4ade804d}.st-prog{color:#8f5a00;background:#ffb84d24;border:1px solid #ffb84d4d}.st-new{color:var(--muted);border:1px solid var(--line);background:#0b0f2b0f}.l-actions{flex-shrink:0;gap:6px;display:flex}.l-btn{border-radius:var(--r-sm);align-items:center;gap:4px;padding:6px 10px;font-size:11.5px;font-weight:700;transition:background .15s,color .15s;display:flex}.l-btn-cw{background:var(--accent-glow);color:var(--accent);border:1px solid var(--accent-line)}.l-btn-cw:hover{background:var(--violet);color:#fff}.l-btn-hw{color:#8f5a00;background:#ffb84d1a;border:1px solid #ffb84d4d}.l-btn-hw:hover{background:var(--gold);color:var(--navy-deep)}.classes-panel{background:var(--white);border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden}.class-item{border-bottom:1px solid var(--line-soft);flex-wrap:wrap;align-items:center;gap:16px;padding:16px 22px;transition:background .15s;display:flex}.class-item:last-child{border-bottom:none}.class-item:hover{background:var(--paper)}.ci-date{text-align:center;flex-shrink:0;min-width:52px}.ci-day{font-family:var(--font-m);text-transform:uppercase;color:var(--muted-light);letter-spacing:.06em;font-size:10px}.ci-num{font-family:var(--font-d);color:var(--ink);font-size:22px;font-weight:700;line-height:1}.ci-divider{background:var(--line);flex-shrink:0;width:1px;height:38px}.ci-info{flex:1;min-width:160px}.ci-subject{color:var(--ink);margin-bottom:3px;font-size:14px;font-weight:700}.ci-meta{color:var(--muted);font-size:12px}.ci-status{font-family:var(--font-m);border-radius:var(--r-pill);padding:4px 10px;font-size:10.5px}.ci-upcoming{background:var(--accent-glow);color:var(--accent);border:1px solid var(--accent-line)}.ci-today{color:#166534;background:#4ade801f;border:1px solid #4ade804d}.ci-join-btn{background:var(--green);color:#166534;border-radius:var(--r-pill);align-items:center;gap:5px;padding:8px 16px;font-size:12.5px;font-weight:700;transition:filter .15s;display:flex}.ci-join-btn:hover{filter:brightness(.95)}.ci-link-btn{background:var(--accent-glow);color:var(--accent);border-radius:var(--r-pill);border:1px solid var(--accent-line);align-items:center;gap:4px;padding:7px 12px;font-size:12px;font-weight:600;transition:background .15s,color .15s;display:flex}.ci-link-btn:hover{background:var(--violet);color:#fff}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:200;background:#070a1ea6;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal{background:var(--white);border-radius:var(--r-xl);width:100%;max-width:560px;max-height:92vh;animation:.2s modalIn;overflow:hidden auto;box-shadow:0 32px 64px #070a1e66}@keyframes modalIn{0%{opacity:0;transform:translateY(12px)scale(.97)}to{opacity:1;transform:none}}.modal-header{background:var(--navy-deep);border-bottom:1px solid 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