@import"https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&display=swap";:root{--bg:#f6f7fb;--card:#fff;--text:#112;--muted:#667;--accent:#3b82f6;--line:#eaecef}*{box-sizing:border-box}html,body,#dashboard-root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.4 Montserrat,system-ui,Segoe UI,Arial;overflow-x:hidden}a{color:inherit;text-decoration:none}.shell{display:grid;grid-template-columns:240px 1fr;height:100vh}.sidebar{background:#0f172a;color:#dbeafe;padding:16px;display:flex;flex-direction:column}.brand,.sidebar .brand{font-weight:700;margin:8px 0 16px}.sidebar nav{display:flex;flex-direction:column;gap:6px}.sidebar a{padding:10px 12px;border-radius:8px;color:#cbd5e1;cursor:pointer}.sidebar a.active,.sidebar a:hover{background:#1e293b;color:#fff}.nav-label{margin-top:8px;opacity:.8;font-weight:700}.nav-children{margin-left:10px;display:flex;flex-direction:column;gap:6px}.sidebar-head{display:none;align-items:center;justify-content:space-between;margin-bottom:8px}.sidebar-close{appearance:none;background:transparent;color:#cbd5e1;border:0;font-size:26px;line-height:1;padding:4px 8px;cursor:pointer}.main{display:flex;flex-direction:column;min-width:0}.topbar{display:flex;gap:12px;align-items:center;padding:16px;position:relative}.hamburger{display:none;width:48px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer}.hamburger span{display:block;width:24px;height:3px;background:#0f172a;border-radius:2px;transition:all .2s ease-in-out}.nav-open .hamburger span:nth-child(1){transform:translateY(8px) rotate(45deg)}.nav-open .hamburger span:nth-child(2){opacity:0}.nav-open .hamburger span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}.overlay{position:fixed;inset:0;background:#00000059;opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:999}.search{flex:1;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff}.user{display:flex;align-items:center;gap:8px;margin-left:auto}.user img{width:28px;height:28px;border-radius:50%}.card{border-radius:14px;box-shadow:0 4px 14px #0000000f;background:#fff}.card-head{display:flex;justify-content:space-between;align-items:center}.card-title{font-weight:700;letter-spacing:.2px}.center{display:flex;justify-content:center;align-items:center}.list li{line-height:1.35}.grid-hero{display:grid;grid-template-columns:1fr;gap:18px}@container (min-width: 980px){.grid-hero{grid-template-columns:1.6fr 1fr}}.hero-left,.hero-right{display:flex;flex-direction:column;gap:18px}.welcome-hero{background:linear-gradient(135deg,#007aff1a,#00c8ff14);border:1px solid rgba(0,0,0,.06)}.welcome-hero .card-head{display:none}.welcome-row{display:flex;align-items:center;justify-content:space-between;min-height:120px}.welcome-copy{font-size:16px}.welcome-line{font-weight:600;margin-bottom:4px}.welcome-sub{opacity:.8}.welcome-art{font-size:56px;line-height:1;filter:drop-shadow(0 4px 10px rgba(0,0,0,.08))}.stack-2col{display:grid;grid-template-columns:1fr 1.15fr;grid-auto-rows:minmax(160px,auto);gap:18px}.stack-activity{grid-column:1;grid-row:1}.stack-chat{grid-column:1;grid-row:2}.stack-completion{grid-column:2;grid-row:1 / span 2;display:flex;flex-direction:column}.grid3{display:block}.col{display:flex;flex-direction:column;gap:18px}.p0 .card-body{padding:0}.welcome-hero{background:linear-gradient(120deg,#007aff1f,#00c8ff1f);border:1px solid rgba(0,0,0,.06);border-radius:14px}.welcome-row{display:flex;align-items:center;justify-content:space-between;padding:20px 22px;min-height:140px}.welcome-title{margin:0 0 6px;font-size:22px;font-weight:800;letter-spacing:.2px}.welcome-title .accent{color:#0ea5e9}.welcome-sub{margin:0 0 14px;opacity:.85}.welcome-cta{display:flex;gap:10px;margin-bottom:14px}.btn{appearance:none;border:1px solid transparent;border-radius:10px;padding:8px 12px;font-weight:600;cursor:pointer}.btn-primary{background:#2563eb;color:#fff;box-shadow:0 6px 18px #2563eb40}.btn-primary:hover{filter:brightness(1.05)}.btn-ghost{background:transparent;border-color:#00000014;color:#111}.btn-ghost:hover{background:#00000008}.welcome-kpis{display:flex;gap:18px}.kpi{display:flex;align-items:baseline;gap:8px}.kpi-v{font-weight:800;font-size:18px}.kpi-l{opacity:.7;font-size:13px}.welcome-illustration{width:130px;height:100px;display:flex;align-items:center;justify-content:center;margin-left:12px}.book{width:68px;height:52px;background:#3b82f6;border-radius:8px;box-shadow:0 10px 22px #00000026;position:relative}.book:after{content:"";position:absolute;right:-6px;top:0;bottom:0;width:6px;background:#111;border-radius:0 8px 8px 0;opacity:.2}.paper{position:absolute;inset:6px;background:#fff;border-radius:6px;box-shadow:inset 0 0 0 2px #fff9}.rd-scope .btn{display:inline-flex;align-items:center;padding:6px 10px;border:1px solid rgba(0,0,0,.1);border-radius:10px;text-decoration:none;font-weight:600;line-height:1}.rd-scope .btn:hover{background:#0000000a}.rd-scope .btn-sm{font-size:.9rem;padding:.25rem .6rem}@media (max-width: 1100px){.welcome-row{padding:18px}.welcome-illustration{display:none}}@media (max-width: 1024px){.shell{grid-template-columns:1fr}.sidebar{position:fixed;inset:0 auto 0 0;width:280px;z-index:1000;transform:translate(-100%);transition:transform .25s ease;padding:14px}.sidebar.open{transform:translate(0)}.sidebar-head{display:flex}.brand{margin:0}.hamburger{display:inline-flex}.topbar{position:sticky;top:0;z-index:500;background:var(--bg)}.nav-open .overlay{opacity:1;pointer-events:auto}.grid-hero{grid-template-columns:1fr!important;padding:0 12px 20px;gap:14px}.stack-2col{grid-template-columns:1fr!important}.card{border-radius:12px}}@media (max-width: 400px){.search{padding:8px 10px}.welcome-row{padding:16px}}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:0 2px 8px #0000000a;overflow:hidden}.card-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--line)}.card-title{font-weight:700}.card-body{padding:16px}.progress-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}.progress-list li{display:grid;grid-template-columns:1fr 1fr 40px;align-items:center;gap:10px}.progress-list .name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.progress-list .bar{height:10px;background:#eef2ff;border-radius:999px;overflow:hidden}.progress-list .bar i{display:block;height:100%;background:var(--accent)}.avatar{width:24px;height:24px;border-radius:50%;margin-right:8px;vertical-align:middle}.pct{font-variant-numeric:tabular-nums}.list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.tile{border:1px solid var(--line);border-radius:12px;padding:12px;text-align:center;background:#fff}.tile-v{font-weight:700;font-size:18px}.tile-l{color:var(--muted);font-size:12px}.cal{display:flex;flex-direction:column;gap:8px}.cal-weekdays{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;color:var(--muted);font-size:12px}.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}.cal-cell{height:34px;border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;justify-content:center;background:#fff}.cal-cell.today{outline:2px solid var(--accent);font-weight:700}.cal-cell.muted{background:transparent;border-color:transparent}.cal-head{display:flex;flex-direction:column;gap:6px}.cal-pill{align-self:flex-start;padding:4px 8px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:12px;font-weight:600}.cal-banner{padding:8px 10px;margin-bottom:8px;border:1px solid var(--line);border-radius:8px;background:#fff;font-weight:600}.lesson-card{position:relative;border:1px dashed var(--line);border-radius:12px;padding:12px;background:#fff}.lesson-title{font-weight:700;margin-bottom:4px}.lesson-meta{color:var(--muted);font-size:12px}.lesson-avatars img{width:24px;height:24px;border-radius:50%;margin-right:4px;margin-top:8px}.circle{position:absolute;right:10px;bottom:10px;width:28px;height:28px;border-radius:50%;border:none;background:var(--accent);color:#fff;font-size:18px;line-height:28px;cursor:pointer}#dashboard-root .site-header{position:sticky;top:0;z-index:2000;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:18px clamp(18px,5vw,56px);background:#fff;border-bottom:1px solid #e2e8f0;box-shadow:0 1px 10px #0f172a0d;font-family:Manrope,Segoe UI,system-ui,sans-serif}#dashboard-root .site-brand{display:flex;align-items:center;gap:14px}#dashboard-root img.site-logo{height:48px;max-height:48px;width:auto;display:block}#dashboard-root .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}#dashboard-root .site-menu-btn{display:none;width:46px;height:46px;border:1px solid #e2e8f0;border-radius:12px;background:#fff;padding:0;gap:6px;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 8px 18px #0f172a14}#dashboard-root .site-menu-btn span{display:block;width:24px;height:3px;background:#0f172a;border-radius:2px;transition:all .2s ease-in-out}#dashboard-root .site-header.open .site-menu-btn span:nth-child(1){transform:translateY(9px) rotate(45deg)}#dashboard-root .site-header.open .site-menu-btn span:nth-child(2){opacity:0}#dashboard-root .site-header.open .site-menu-btn span:nth-child(3){transform:translateY(-9px) rotate(-45deg)}#dashboard-root .site-nav ul{display:flex;align-items:center;gap:36px;margin:0;padding:0;list-style:none}#dashboard-root .site-header .site-nav a{color:#1a1a1ad9;font-weight:500;font-size:15px;letter-spacing:.02em;font-family:Manrope,sans-serif;text-decoration:none}#dashboard-root .site-header .site-nav a:hover,#dashboard-root .site-header .site-nav a:focus{color:#ef4444}#dashboard-root .site-header .site-nav .user-link{display:inline-flex;align-items:center;color:#2563eb}@media (max-width: 992px){#dashboard-root .site-menu-btn{display:inline-flex}#dashboard-root .site-nav{position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid #e2e8f0;box-shadow:0 10px 30px #0f172a1a;transform:translateY(-12px);opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease}#dashboard-root .site-header.open .site-nav{transform:none;opacity:1;pointer-events:auto}#dashboard-root .site-nav ul{flex-direction:column;align-items:flex-start;gap:18px;padding:18px 22px 24px}#dashboard-root .site-nav a{font-size:16px}}#dashboard-root .chatroom{display:flex;flex-direction:column;gap:10px}#dashboard-root .chat-head{display:flex;align-items:baseline;gap:12px;justify-content:space-between;padding:6px 2px}#dashboard-root .chat-head .title{font-weight:700;font-size:16px}#dashboard-root .chat-scroll{max-height:52vh;overflow:auto;padding:8px;background:#fff;border:1px solid var(--rd-line);border-radius:10px}#dashboard-root .chat-status{color:#6b7280;padding:12px}#dashboard-root .chat-msg{padding:10px 8px;border-bottom:1px dashed #e5e7eb}#dashboard-root .chat-msg:last-child{border-bottom:0}#dashboard-root .chat-msg .meta{font-size:12px;color:#6b7280;display:flex;gap:8px}#dashboard-root .chat-msg .meta b{color:#0f172a}#dashboard-root .chat-msg .body{margin-top:4px;line-height:1.4;word-break:break-word}#dashboard-root .chat-form{display:flex;gap:10px;align-items:flex-start}#dashboard-root .chat-form textarea{flex:1;border:1px solid var(--rd-line);border-radius:10px;padding:8px 10px;resize:vertical}