:root{--brand-50:#eff6ff;--brand-100:#dbeafe;--brand-200:#bfdbfe;--brand-300:#93c5fd;--brand-400:#3b82f6;--brand-500:#1e40af;--brand-600:#1e3a8a;--brand-700:#1e3578;--brand-800:#172554;--brand-900:#0f172a;--bg:#fafafa;--surface:#ffffff;--surface-2:#f5f5f4;--surface-3:#ebebe9;--line:#e7e7e4;--line-2:#d4d4d1;--text:#1c1c1a;--text-2:#525250;--text-3:#8a8a85;--text-4:#b5b5b0;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--info:#3b82f6;--role-admin:#6366f1;--role-teacher:#0ea5e9;--role-student:#f59e0b;--role-parent:#ec4899;--font-display:"Inter Tight",ui-sans-serif,system-ui,sans-serif;--font-sans:"Inter",ui-sans-serif,system-ui,sans-serif;--font-mono:"JetBrains Mono",ui-monospace,monospace;--r-xs:6px;--r-sm:8px;--r-md:12px;--r-lg:16px;--r-xl:24px;--r-2xl:32px;--shadow-xs:0 1px 2px rgba(15,15,12,.04);--shadow-sm:0 1px 2px rgba(15,15,12,.04),0 1px 3px rgba(15,15,12,.06);--shadow-md:0 2px 4px rgba(15,15,12,.04),0 6px 16px rgba(15,15,12,.06);--shadow-lg:0 8px 24px rgba(15,15,12,.08),0 24px 64px rgba(15,15,12,.10);--density:1;--row-h:calc(44px * var(--density));--pad-2:calc(8px * var(--density));--pad-3:calc(12px * var(--density));--pad-4:calc(16px * var(--density));--pad-5:calc(20px * var(--density));--pad-6:calc(24px * var(--density));--sidebar-w:248px;--topbar-h:64px}[data-theme=dark]{--bg:#0c0c0b;--surface:#161614;--surface-2:#1f1f1c;--surface-3:#2a2a26;--line:#2a2a26;--line-2:#3a3a35;--text:#f5f5f1;--text-2:#b0b0a8;--text-3:#80807a;--text-4:#5a5a55;--shadow-xs:0 1px 2px rgba(0,0,0,.4);--shadow-sm:0 1px 2px rgba(0,0,0,.4),0 1px 3px rgba(0,0,0,.5);--shadow-md:0 2px 4px rgba(0,0,0,.3),0 6px 16px rgba(0,0,0,.4);--shadow-lg:0 8px 24px rgba(0,0,0,.5),0 24px 64px rgba(0,0,0,.6)}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:var(--font-sans);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{min-height:100vh}button,input,select,textarea{font:inherit;color:inherit}button{background:none;border:none;cursor:pointer;padding:0}a{color:inherit;text-decoration:none}.app{display:grid;grid-template-columns:var(--sidebar-w) 1fr;min-height:100vh;background:var(--bg)}.app[data-collapsed=true]{--sidebar-w:76px}.app[data-sidebar-style=floating]{padding:12px;gap:12px;background:var(--surface-2)}.app[data-sidebar-style=floating] .sidebar{border-radius:var(--r-lg);border:1px solid var(--line);height:calc(100vh - 24px);position:-webkit-sticky;position:sticky;top:12px}.app[data-sidebar-style=floating] .main{border-radius:var(--r-lg);border:1px solid var(--line);overflow:hidden}.sidebar{background:var(--surface);border-right:1px solid var(--line);display:flex;flex-direction:column;position:-webkit-sticky;position:sticky;top:0;height:100vh;overflow:hidden}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:18px;height:var(--topbar-h);border-bottom:1px solid transparent}.sidebar-brand .logo{width:32px;height:32px;border-radius:9px;background:var(--brand-500);display:grid;place-items:center;color:white;font-family:var(--font-display);font-weight:800;flex:0 0 auto}.sidebar-brand .name{font-family:var(--font-display);font-weight:700;font-size:15px;letter-spacing:-.01em;white-space:nowrap}.sidebar-brand .role-badge{font-size:10px;font-weight:600;background:var(--surface-2);color:var(--text-3);padding:2px 6px;border-radius:4px;text-transform:uppercase;letter-spacing:.05em}.sidebar-section{padding:12px;display:flex;flex-direction:column;gap:2px}.sidebar-section+.sidebar-section{border-top:1px solid var(--line)}.sidebar-label{padding:8px 10px 6px;font-size:10px;font-weight:600;color:var(--text-3);text-transform:uppercase;letter-spacing:.08em}.nav-item{display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:var(--r-sm);color:var(--text-2);font-weight:500;font-size:13.5px;cursor:pointer;position:relative;transition:background .12s ease,color .12s ease;white-space:nowrap}.nav-item.active,.nav-item:hover{background:var(--surface-2);color:var(--text)}.nav-item.active{font-weight:600}.nav-item.active:before{content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);width:3px;height:18px;background:var(--brand-500);border-radius:0 3px 3px 0}.nav-item .nav-icon{width:18px;height:18px;flex:0 0 auto}.nav-item .nav-badge{margin-left:auto;font-size:10px;font-weight:700;background:var(--brand-500);color:white;padding:2px 6px;border-radius:999px}.app[data-collapsed=true] .nav-item{justify-content:center;padding:10px}.app[data-collapsed=true] .nav-item .nav-badge,.app[data-collapsed=true] .nav-item .nav-label,.app[data-collapsed=true] .sidebar-brand .name,.app[data-collapsed=true] .sidebar-brand .role-badge,.app[data-collapsed=true] .sidebar-label{display:none}.sidebar-foot{margin-top:auto;padding:12px;border-top:1px solid var(--line)}.sidebar .user-pill{display:flex;align-items:center;gap:10px;padding:8px;border-radius:var(--r-sm);cursor:pointer}.sidebar .user-pill:hover{background:var(--surface-2)}.main{display:flex;flex-direction:column;min-width:0;background:var(--bg)}.app[data-sidebar-style=floating] .main,.topbar{background:var(--surface)}.topbar{height:var(--topbar-h);display:flex;align-items:center;gap:12px;padding:0 24px;border-bottom:1px solid var(--line);position:-webkit-sticky;position:sticky;top:0;z-index:50}.app[data-sidebar-style=floating] .topbar{background:transparent;border-bottom:1px solid var(--line)}.workspace-tab-bar{flex:0 0 auto;border-bottom:1px solid var(--line);background:var(--surface);min-height:40px}.workspace-tab-bar-scroll{display:flex;align-items:stretch;gap:2px;padding:0 12px;overflow-x:auto}.workspace-tab{display:inline-flex;align-items:stretch;max-width:220px;flex:0 0 auto;border-bottom:2px solid transparent;margin-bottom:-1px}.workspace-tab.active{border-bottom-color:var(--brand-500)}.workspace-tab-main{display:inline-flex;align-items:center;gap:6px;padding:8px 10px;font-size:12px;font-weight:600;color:var(--text-3);background:transparent;border:none;cursor:pointer;min-width:0}.workspace-tab-main:hover,.workspace-tab.active .workspace-tab-main{color:var(--text)}.workspace-tab-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.workspace-tab-close{display:inline-flex;align-items:center;justify-content:center;width:28px;padding:0;margin-right:2px;background:transparent;border:none;color:var(--text-3);cursor:pointer;border-radius:var(--r-sm);flex:0 0 auto}.workspace-tab-close:hover{background:var(--surface-2);color:var(--text)}.main-content{flex:1 1;min-height:0;overflow:auto}.topbar-search{flex:1 1;max-width:520px;display:flex;align-items:center;gap:8px;padding:8px 14px;background:var(--surface-2);border:1px solid transparent;border-radius:999px;color:var(--text-3);transition:border-color .12s ease,background .12s ease}.topbar-search:focus-within{border-color:var(--brand-500);background:var(--surface)}.topbar-search input{flex:1 1;background:none;border:none;outline:none;color:var(--text);font-size:13.5px}.topbar-search input::placeholder{color:var(--text-3)}.topbar-search-wrap{position:relative;flex:12 1;max-width:none}.topbar-search-wrap .topbar-search{flex:1 1;max-width:none;width:100%}.topbar-search-clear{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border:none;background:transparent;color:var(--text-3);border-radius:999px;cursor:pointer;padding:0;margin:0}.topbar-search-clear:hover{background:var(--surface-3);color:var(--text)}.topbar-search-kbd{font:600 10px/1 ui-monospace,SFMono-Regular,Menlo,Monaco,Cascadia Mono,monospace;color:var(--text-3);background:var(--surface-3);border:1px solid var(--line);border-radius:6px;padding:3px 6px;letter-spacing:.02em}.topbar-search-wrap:focus-within .topbar-search-kbd{display:none}.topbar-search-pop{position:absolute;top:calc(100% + 6px);left:0;right:0;z-index:60;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 32px rgba(0,0,0,.08),0 2px 6px rgba(0,0,0,.04);padding:6px 0;max-height:70vh;overflow-y:auto}.topbar-search-empty{padding:18px 16px;color:var(--text-3);font-size:13px;text-align:center}.topbar-search-section{padding:4px 0}.topbar-search-section+.topbar-search-section{border-top:1px solid var(--line);margin-top:2px;padding-top:6px}.topbar-search-section-label{padding:6px 14px 4px;font-size:11px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--text-3)}.topbar-search-row{display:flex;align-items:center;gap:10px;width:100%;padding:8px 14px;border:none;background:transparent;color:var(--text);text-align:left;cursor:pointer;font:inherit;transition:background-color 80ms ease}.topbar-search-row.is-active,.topbar-search-row:hover{background:var(--brand-50)}.topbar-search-row-icon,:root[data-theme=dark] .topbar-search-row.is-active,:root[data-theme=dark] .topbar-search-row:hover{background:var(--surface-2)}.topbar-search-row-icon{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;flex-shrink:0;border-radius:8px;color:var(--text-2,var(--text))}.topbar-search-row-icon.kind-user{background:#eef2ff;color:#4338ca}.topbar-search-row-icon.kind-class{background:#ecfdf5;color:#047857}.topbar-search-row-icon.kind-course{background:#fef3c7;color:#92400e}.topbar-search-row-icon.kind-material{background:#ede9fe;color:#6d28d9}.topbar-search-row-icon.kind-assignment{background:#fee2e2;color:#b91c1c}.topbar-search-row-icon.kind-branch{background:#e0f2fe;color:#0369a1}.topbar-search-row-icon.kind-page{background:var(--surface-3);color:var(--text)}.topbar-search-row-icon.kind-recent{background:var(--surface-3);color:var(--text-3)}:root[data-theme=dark] .topbar-search-row-icon.kind-assignment,:root[data-theme=dark] .topbar-search-row-icon.kind-branch,:root[data-theme=dark] .topbar-search-row-icon.kind-class,:root[data-theme=dark] .topbar-search-row-icon.kind-course,:root[data-theme=dark] .topbar-search-row-icon.kind-material,:root[data-theme=dark] .topbar-search-row-icon.kind-user{background:var(--surface-2);color:var(--text)}.topbar-search-row-text{display:flex;flex-direction:column;flex:1 1;min-width:0}.topbar-search-row-title{font-size:13.5px;color:var(--text)}.topbar-search-row-sub,.topbar-search-row-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.topbar-search-row-sub{font-size:11.5px;color:var(--text-3);margin-top:1px}.topbar-search-mark{background:transparent;color:var(--brand-500);font-weight:700;padding:0}.topbar-search-row-enter{font-size:11px;color:var(--text-3);opacity:0;margin-left:6px}.topbar-search-row.is-active .topbar-search-row-enter{opacity:1}.topbar-spacer{flex:1 1}.compose{border-top:1px solid var(--line);padding:12px;display:flex;flex-direction:column;gap:6px;background:var(--surface)}.compose-bar{display:flex;align-items:flex-end;gap:8px;padding:8px 8px 8px 14px;background:var(--surface-2);border:1px solid var(--line);border-radius:22px;transition:border-color .12s ease,box-shadow .12s ease,background .12s ease}.compose-bar:focus-within{border-color:var(--brand-500);background:var(--surface);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand-500) 18%,transparent)}.compose-bar textarea{flex:1 1;min-height:22px;max-height:160px;resize:none;background:none;border:none;outline:none;color:var(--text);font-family:inherit;font-size:14px;line-height:1.45;padding:6px 0}.compose-bar textarea::placeholder{color:var(--text-3)}.compose-send{flex:0 0 auto;width:36px;height:36px;border-radius:999px;border:none;display:grid;place-items:center;cursor:pointer;background:var(--brand-500);color:white;transition:background .12s ease,transform .12s ease,opacity .12s ease}.compose-send:hover:not(:disabled){background:var(--brand-600,var(--brand-500));transform:translateY(-1px)}.compose-send:disabled{background:var(--surface-2);color:var(--text-3);cursor:not-allowed}.compose-send svg{transform:translateX(-1px) translateY(1px)}.compose-hint{font-size:11px;color:var(--text-3);padding:0 14px;display:flex;align-items:center;gap:6px}.compose-hint kbd{font-family:var(--font-mono,ui-monospace,monospace);font-size:10px;padding:1px 5px;border:1px solid var(--line);border-radius:4px;background:var(--surface-2);color:var(--text-2)}.icon-btn{width:38px;height:38px;border-radius:999px;display:grid;place-items:center;color:var(--text-2);cursor:pointer;position:relative;transition:background .12s ease,color .12s ease}.icon-btn:hover{background:var(--surface-2);color:var(--text)}.icon-btn .dot{position:absolute;top:9px;right:10px;width:7px;height:7px;background:var(--danger);border:2px solid var(--surface);border-radius:999px}.avatar{border-radius:999px;background:var(--surface-3);display:grid;place-items:center;color:var(--text-2);font-weight:600;font-size:12px;flex:0 0 auto;overflow:hidden;position:relative}.avatar img{width:100%;height:100%;object-fit:cover}.avatar.sm{width:28px;height:28px;font-size:11px}.avatar.md{width:36px;height:36px;font-size:13px}.avatar.lg{width:44px;height:44px;font-size:15px}.avatar.xl{width:64px;height:64px;font-size:20px}.avatar.xxl{width:96px;height:96px;font-size:28px}.page{padding:var(--pad-6);max-width:1440px;margin:0 auto;width:100%}.page-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:24px;gap:16px;flex-wrap:wrap}.page-head h1{font-family:var(--font-display);font-size:28px;font-weight:700;letter-spacing:-.02em;margin:0 0 4px;color:var(--text)}.page-head .sub{color:var(--text-3);font-size:13.5px}.page-head .actions{display:flex;align-items:center;gap:8px}.feed-column{width:100%;max-width:720px;margin-left:auto;margin-right:auto}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;padding:0 14px;font-size:13px;font-weight:600;border-radius:var(--r-sm);border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:background .12s ease,border-color .12s ease,color .12s ease,transform 80ms ease}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn:disabled,.btn:disabled:active{transform:none}.btn .icon{width:16px;height:16px}.btn-primary{background:var(--brand-600);color:white}.btn-primary:hover{background:var(--brand-700)}.btn-secondary{background:var(--surface);border-color:var(--line-2);color:var(--text)}.btn-secondary:hover{background:var(--surface-2)}.btn-ghost{background:transparent;color:var(--text-2)}.btn-ghost:hover{background:var(--surface-2);color:var(--text)}.btn-danger{background:var(--danger);color:white}.btn-danger:hover{background:#d93030}.btn.lg{height:44px;padding:0 20px;font-size:14px;border-radius:10px}.btn.sm{height:30px;padding:0 10px;font-size:12px}.btn.icon-only{width:36px;padding:0}.btn.icon-only.sm{width:30px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}.card-pad{padding:var(--pad-5)}.card-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}.card-head h3{font-family:var(--font-display);font-size:15px;font-weight:600;margin:0;letter-spacing:-.01em}.card-head .sub{color:var(--text-3);font-size:12px}.kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:16px;gap:16px;margin-bottom:24px}@media (max-width:1100px){.kpi-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:600px){.kpi-grid{grid-template-columns:1fr}}@keyframes skeleton-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton{background:var(--surface-2)}.skeleton-shimmer{background:linear-gradient(90deg,var(--surface-2) 0,var(--surface-3) 38%,var(--surface-2) 76%);background-size:200% 100%;animation:skeleton-shimmer 1.35s ease-in-out infinite}.kpi{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:18px 20px;display:flex;flex-direction:column;gap:6px;position:relative;overflow:hidden}.kpi .kpi-label{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-3);font-weight:500}.kpi .kpi-icon{width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:var(--brand-50);color:var(--brand-700)}[data-theme=dark] .kpi .kpi-icon{background:rgba(30,64,175,.15);color:var(--brand-400)}.kpi .kpi-value{font-family:var(--font-display);font-size:30px;font-weight:700;letter-spacing:-.02em;color:var(--text);margin-top:4px;line-height:1}.kpi .kpi-delta{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:600;color:var(--success);margin-top:6px}.kpi .kpi-delta.down{color:var(--danger)}.kpi .kpi-delta .muted{color:var(--text-3);font-weight:400}.hero{display:grid;grid-template-columns:1.1fr 1fr;grid-gap:0;gap:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;margin-bottom:24px;min-height:280px}@media (max-width:900px){.hero{grid-template-columns:1fr}}.hero-text{padding:32px;display:flex;flex-direction:column;justify-content:center;gap:12px}.hero-eyebrow{display:inline-flex;align-items:center;gap:6px;font-size:11px;color:var(--brand-700);background:var(--brand-50);padding:4px 10px;border-radius:999px;font-weight:600;width:-moz-fit-content;width:fit-content;text-transform:uppercase;letter-spacing:.05em}[data-theme=dark] .hero-eyebrow{background:rgba(30,64,175,.15);color:var(--brand-400)}.hero-text h2{font-family:var(--font-display);font-size:32px;font-weight:700;letter-spacing:-.025em;margin:4px 0 0;text-wrap:balance}.hero-text p{color:var(--text-2);margin:4px 0 8px;max-width:42ch;text-wrap:pretty}.hero-image{background:linear-gradient(135deg,#1a1f2e,#2c3e50 50%,#4a6741);position:relative;min-height:280px;overflow:hidden}.hero-image:after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 60% 30%,rgba(255,224,168,.4),transparent 50%),radial-gradient(ellipse at 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ease}.math-edit-chip-x:hover{color:var(--danger);background:rgba(239,68,68,.08)}.math-edit-section{display:flex;flex-direction:column;gap:8px;padding-top:10px;border-top:1px solid var(--line)}.math-edit-section-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.math-edit-section-h{margin:0;font-size:13px;font-weight:700;color:var(--text);letter-spacing:.01em}.math-edit-search-wrap{position:relative;display:inline-flex;align-items:center;flex:1 1;min-width:180px;max-width:320px}.math-edit-search-wrap>svg{position:absolute;left:8px;color:var(--text-3);pointer-events:none}.math-edit-search{width:100%;border:1px solid var(--line);border-radius:8px;padding:6px 26px;font-size:12px;background:var(--surface);color:var(--text);outline:none;transition:border-color .12s ease,box-shadow .12s ease}.math-edit-search:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(30,64,175,.15)}.math-edit-search-x{position:absolute;right:4px;-webkit-appearance:none;-moz-appearance:none;appearance:none;border:0;background:transparent;width:20px;height:20px;display:grid;place-items:center;border-radius:4px;color:var(--text-3);cursor:pointer}.math-edit-search-x:hover{background:var(--surface-2);color:var(--text)}.math-edit-cat-tabs{display:flex;flex-wrap:wrap;gap:4px;padding-bottom:4px;border-bottom:1px solid var(--line)}.math-edit-cat-tabs.is-disabled .math-edit-cat-tab{opacity:.5}.math-edit-cat-tab{-webkit-appearance:none;-moz-appearance:none;appearance:none;display:inline-flex;align-items:center;gap:5px;border:0;background:transparent;padding:5px 10px;border-radius:6px;font-size:12px;color:var(--text-2);cursor:pointer;white-space:nowrap;transition:background-color .12s ease,color .12s ease}.math-edit-cat-tab:hover{background:var(--surface-2);color:var(--text)}.math-edit-cat-tab.is-active{background:var(--brand-50);color:var(--brand-700);font-weight:600}.math-edit-cat-count{font-size:10px;font-weight:600;color:var(--text-3);background:var(--surface-2);border-radius:999px;padding:1px 6px;line-height:1.4}.math-edit-cat-tab.is-active .math-edit-cat-count{background:var(--brand-500);color:#fff}.math-edit-pal-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(64px,1fr));grid-gap:6px;gap:6px;max-height:240px;overflow-y:auto;padding:4px;background:var(--surface-2);border-radius:8px;border:1px solid var(--line)}.math-edit-pal-cell{-webkit-appearance:none;-moz-appearance:none;appearance:none;display:grid;place-items:center;min-height:44px;padding:6px 8px;border:1px solid transparent;border-radius:6px;background:var(--surface);color:var(--text);cursor:pointer;transition:background-color .12s ease,border-color .12s ease,transform 80ms ease,box-shadow .12s ease}.math-edit-pal-cell:hover{background:var(--brand-50);border-color:var(--brand-500);box-shadow:0 1px 4px rgba(30,64,175,.12)}.math-edit-pal-cell:active{transform:scale(.96)}.math-edit-pal-cell .katex{font-size:14px}.math-edit-pal-empty{grid-column:1/-1;text-align:center;font-size:12px;color:var(--text-3);padding:24px 8px;font-style:italic}.math-edit-pal-meta{font-size:11px;color:var(--text-3);text-align:right}.math-edit-custom-row{display:flex;gap:6px;align-items:center;padding-top:4px}.math-edit-custom{flex:1 1;border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;background:var(--surface);color:var(--text);outline:none;transition:border-color .12s ease,box-shadow .12s ease}.math-edit-custom:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(30,64,175,.15)}.math-edit-chip-edit{background:var(--surface);border:1px solid var(--brand-500);border-radius:10px;box-shadow:0 0 0 2px rgba(30,64,175,.12);padding:10px 12px 12px;display:flex;flex-direction:column;gap:10px;margin-top:4px}.math-edit-chip-edit-head{display:flex;align-items:center;gap:8px}.math-edit-chip-edit-title{font-size:13px;font-weight:700;color:var(--brand-700);letter-spacing:.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1 1;min-width:0}.math-edit-tpl-switch{-moz-appearance:none;appearance:none;-webkit-appearance:none;border:1px solid var(--line);border-radius:6px;padding:4px 8px;font-size:12px;background:var(--surface);color:var(--text);cursor:pointer}.math-edit-slots{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));grid-gap:10px 12px;gap:10px 12px}.math-edit-free,.math-edit-slot{display:flex;flex-direction:column;gap:4px;min-width:0}.math-edit-free input,.math-edit-slot input{width:100%;border:1px solid var(--line);border-radius:6px;padding:6px 8px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;background:var(--surface);color:var(--text);outline:none;transition:border-color .12s ease,box-shadow .12s ease;box-sizing:border-box}.math-edit-free input:focus,.math-edit-slot input:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px rgba(30,64,175,.15)}.math-edit-slot-label{font-size:11px;font-weight:600;color:var(--text-3);letter-spacing:.02em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.math-edit-solve{background:var(--surface-2);border-radius:8px;padding:8px 10px;display:flex;flex-direction:column;gap:6px}.math-edit-solve-head{display:flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--text-2);letter-spacing:.01em}.math-edit-solve-body{display:flex;align-items:center;gap:6px;min-height:28px;padding:4px 0;flex-wrap:wrap}.math-edit-solve-body .katex{font-size:14px}.math-edit-solve-eq{font-weight:700;color:var(--brand-700)}.math-edit-solve-empty{font-size:12px;color:var(--text-3);font-style:italic}.math-edit-solve-toggle{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--text-2);cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none}.math-edit-solve-toggle input{cursor:pointer}.math-edit-solve-toggle input:disabled{cursor:not-allowed}.math-edit-tpl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));grid-gap:6px;gap:6px;padding:4px 0}.math-edit-tpl-btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 6px;border:1px solid var(--line);border-radius:8px;background:var(--surface);cursor:pointer;transition:background-color .12s ease,border-color .12s ease,transform 80ms ease;min-width:0;overflow:hidden}.math-edit-tpl-btn:hover{background:var(--brand-50);border-color:var(--brand-500)}.math-edit-tpl-btn:active{transform:scale(.97)}.math-edit-tpl-btn .katex{font-size:13px}.math-edit-tpl-name{font-size:11px;font-weight:600;color:var(--text-2);text-align:center;width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.math-edit-foot{display:flex;align-items:center;gap:6px;padding:8px 10px;border-top:1px solid var(--line);background:var(--surface-2)}.math-edit-del{color:var(--danger)}@keyframes pulse{0%,to{opacity:.4;transform:scale(1)}50%{opacity:1;transform:scale(1.15)}}@keyframes datepicker-pop{0%{opacity:0;transform:translateY(-6px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes datepicker-sheet-up{0%{transform:translateY(100%)}to{transform:translateY(0)}}@media (max-width:480px){.datepicker-sheet-backdrop{display:block;position:fixed;inset:0;z-index:70;background:rgba(15,23,42,.5);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);animation:sidebar-fade-in .16s ease-out}.datepicker-popover{position:fixed;inset:auto 0 0 0;top:auto;width:100%;border-radius:16px 16px 0 0;padding:16px 14px calc(16px + env(safe-area-inset-bottom, 0));z-index:75;animation:datepicker-sheet-up .24s cubic-bezier(.16,1,.3,1);transform-origin:bottom center}.datepicker-day{min-height:44px;font-size:15px}.datepicker-month{font-size:15px}}