:root{--navy-950:#12172a;--navy-900:#1a2138;--navy-800:#232c49;--navy-700:#2e3a5f;--orange:#e8732c;--orange-dim:#f3a06c;--green:#3fae74;--paper:#eef1f7;--card:#ffffff;--ink:#1a2138;--ink-soft:#5b6478;--line:#dde2ee;--radius:14px}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;min-height:100vh}body{background:var(--paper);color:var(--ink);font-family:Inter,system-ui,-apple-system,sans-serif}a{color:inherit}button{font-family:inherit}.app{max-width:1080px;margin:0 auto;padding:28px 20px 80px}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at top,var(--navy-800),var(--navy-950));padding:20px}.login-card{background:var(--card);border-radius:18px;padding:36px 32px;width:100%;max-width:380px;box-shadow:0 30px 60px -20px #0006}.login-card h1{font-family:Space Grotesk,sans-serif;font-size:22px;margin:0 0 4px}.login-card p{color:var(--ink-soft);font-size:13.5px;margin:0 0 22px}.login-card label{display:block;font-size:12px;font-weight:600;color:var(--ink-soft);margin:14px 0 5px}.login-card input{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--line);font-size:14px;background:var(--paper);color:var(--ink)}.login-submit{width:100%;margin-top:22px;background:var(--orange);color:#fff;border:none;padding:11px;border-radius:8px;font-weight:700;font-size:14px;cursor:pointer}.login-error{color:#c23b3b;font-size:12.5px;margin-top:10px}.demo-accounts{margin-top:24px;border-top:1px solid var(--line);padding-top:16px}.demo-accounts p{font-size:11.5px;color:var(--ink-soft);margin:0 0 8px}.demo-btn{display:block;width:100%;text-align:left;background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:8px 10px;margin-bottom:6px;font-size:12.5px;cursor:pointer;color:var(--ink)}.demo-btn:hover{border-color:var(--orange)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:26px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--navy-800),var(--navy-950));display:flex;align-items:center;justify-content:center;color:var(--orange);flex-shrink:0}.brand-name{font-family:Space Grotesk,sans-serif;font-weight:700;font-size:19px}.brand-name span{color:var(--orange)}.brand-sub{font-size:12px;color:var(--ink-soft);margin-top:1px}.who-am-i{font-size:12px;color:var(--ink-soft);text-align:right}.who-am-i strong{color:var(--ink)}.logout-btn{background:none;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:11.5px;color:var(--ink-soft);cursor:pointer;margin-top:4px}.role-switch{display:flex;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:4px;gap:2px}.role-switch button{border:none;background:transparent;padding:8px 16px;border-radius:999px;font-weight:600;font-size:13px;color:var(--ink-soft);cursor:pointer}.role-switch button.active{background:var(--navy-950);color:#fff}.credit-stub{display:flex;align-items:center;gap:10px;background:var(--navy-950);color:#fff;border-radius:999px;padding:8px 16px 8px 10px}.credit-stub .tickets{display:flex;gap:3px}.ticket-dot{width:9px;height:16px;border-radius:3px;background:var(--orange)}.ticket-dot.used{background:var(--navy-700)}.credit-stub .num{font-family:Space Mono,monospace;font-weight:700;font-size:15px}.credit-stub .lbl{font-size:11px;color:#b9c0d6}.tabs{display:flex;gap:6px;margin:6px 0 18px;border-bottom:1px solid var(--line)}.tab{font-family:Space Grotesk,sans-serif;font-weight:600;font-size:14px;padding:10px 4px;margin-right:22px;color:var(--ink-soft);border-bottom:2px solid transparent;cursor:pointer;background:none;border-top:none;border-left:none;border-right:none}.tab.active{color:var(--ink);border-bottom-color:var(--orange)}.board{background:var(--navy-950);border-radius:18px;padding:6px 0;overflow:hidden;box-shadow:0 20px 40px -20px #0a0e1e80}.board-head{display:grid;grid-template-columns:90px 1.6fr 1fr 1fr 130px 190px;gap:10px;padding:16px 22px 10px;font-family:Space Mono,monospace;font-size:11px;letter-spacing:1px;color:#7d87a6}.board-row{display:grid;grid-template-columns:90px 1.6fr 1fr 1fr 130px 190px;gap:10px;align-items:center;padding:16px 22px;border-top:1px solid #232c49;color:#eef1f7}.board-row:first-of-type{border-top:none}.code{font-family:Space Mono,monospace;font-weight:700;font-size:13px;color:#b9c0d6}.course-name{font-family:Space Grotesk,sans-serif;font-weight:600;font-size:15px}.course-sub{font-size:12px;color:#9aa3ba;margin-top:2px}.board-cell{font-family:Space 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20px;border-radius:8px;border:none;font-weight:700;font-size:13.5px;cursor:pointer;width:auto}.mine-row{display:flex;align-items:center;justify-content:space-between;padding:12px 4px;border-top:1px solid var(--line);gap:12px;flex-wrap:wrap}.mine-row:first-of-type{border-top:none}.mine-title{font-weight:600;font-size:14px}.mine-sub{font-size:12px;color:var(--ink-soft);margin-top:2px}.btn-small{padding:7px 12px;border-radius:7px;border:1px solid var(--line);background:transparent;color:var(--ink);font-size:12.5px;font-weight:600;cursor:pointer;width:auto}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin-bottom:20px}.stat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}.stat-num{font-family:Space Grotesk,sans-serif;font-weight:700;font-size:28px;color:var(--ink)}.stat-lbl{font-size:12px;color:var(--ink-soft);margin-top:4px}.empty{text-align:center;padding:40px 20px;color:var(--ink-soft);font-size:13.5px}.toast{position:fixed;bottom:22px;left:50%;transform:translate(-50%) translateY(20px);background:var(--navy-950);color:#fff;padding:12px 20px;border-radius:10px;font-size:13.5px;font-weight:600;opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease;box-shadow:0 12px 30px -10px #0006;display:flex;align-items:center;gap:8px;z-index:50}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}.toast .dot{width:7px;height:7px;border-radius:50%;background:var(--orange)}.toast.error .dot{background:#e05a5a}@media (max-width:760px){.board-head{display:none}.board-row{grid-template-columns:1fr;row-gap:8px;padding:16px}.form-grid{grid-template-columns:1fr}}textarea{width:100%;padding:9px 10px;border-radius:8px;border:1px solid var(--line);background:var(--paper);color:var(--ink);font-size:13.5px;font-family:inherit;resize:vertical}input:focus,select:focus,textarea:focus{outline:2px solid var(--orange-dim);outline-offset:1px}.link-btn{background:none;border:none;color:var(--orange);font-weight:600;font-size:13px;cursor:pointer;padding:0}.link-btn.light{color:#cfd4e4;text-decoration:underline;font-weight:500;font-size:12px}.btn-small.danger{color:#c23b3b;border-color:#f0c9c9}.row-actions{display:flex;gap:6px;flex-wrap:wrap}.mine-row.inactive .mine-title{color:var(--ink-soft);text-decoration:line-through}.inline-form{flex-basis:100%;display:flex;gap:8px;align-items:center;margin-top:4px}.inline-form input{flex:1}.subtabs{display:inline-flex;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:4px;gap:2px;margin-bottom:16px}.subtabs button{border:none;background:transparent;padding:7px 16px;border-radius:999px;font-weight:600;font-size:13px;color:var(--ink-soft);cursor:pointer}.subtabs button.active{background:var(--navy-950);color:#fff}.ai-text{white-space:pre-wrap;font-size:14px;line-height:1.65;background:var(--paper);border-radius:10px;padding:14px 16px}.qcm-options{display:flex;flex-direction:column;gap:8px;margin-top:10px}.qcm-opt{text-align:left;padding:10px 12px;border-radius:8px;border:1px solid var(--line);background:var(--card);cursor:pointer;font-size:13.5px;color:var(--ink)}.qcm-opt:hover:not(:disabled){border-color:var(--orange)}.qcm-opt:disabled{cursor:default}.qcm-opt.good{background:#3fae741f;border-color:var(--green)}.qcm-opt.bad{background:#e05a5a1f;border-color:#e05a5a}.credential-box{background:#fff8ef;border:1px solid var(--orange-dim);border-radius:var(--radius);padding:18px;margin-bottom:20px}.credential-box pre{white-space:pre-wrap;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px;font-size:13px;font-family:Space Mono,monospace;margin:0 0 12px}.who-am-i{display:flex;flex-direction:column;align-items:flex-end;gap:4px}@media (max-width:760px){.who-am-i{align-items:flex-start}.inline-form{flex-wrap:wrap}.row-actions{width:100%}}.credential-box .hint{font-size:13px;color:var(--ink-soft)}.cal-intro{margin:0 0 12px!important;font-size:13px;color:var(--ink-soft)}.cal{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin-bottom:20px}.cal-toolbar{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px}.cal-nav{display:flex;align-items:center;gap:6px}.cal-range{font-family:Space Grotesk,sans-serif;font-weight:700;font-size:15px;margin-left:8px}.cal-loading{color:var(--ink-soft)}.cal-filters{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.cal-filters select{width:auto}.check-inline{display:inline-flex;align-items:center;gap:6px;margin:0;font-size:13px;color:var(--ink);font-weight:500;cursor:pointer}.check-inline 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1px)}.cal-col.today{background-color:#e8732c0a}.cal-col.clickable{cursor:copy}.cal-col.clickable:hover{background-color:#1a213806}.cal-now{position:absolute;left:0;right:0;height:2px;background:#e05a5a;z-index:2;pointer-events:none}.cal-now:before{content:"";position:absolute;left:-4px;top:-3px;width:8px;height:8px;border-radius:50%;background:#e05a5a}.cal-ev{position:absolute;z-index:1;border:none;border-radius:7px;padding:4px 6px;text-align:left;cursor:pointer;overflow:hidden;display:flex;flex-direction:column;gap:1px;font-size:11.5px;line-height:1.25;border-left:3px solid transparent}.cal-ev:focus-visible,.agenda-ev:focus-visible{outline:2px solid var(--orange);outline-offset:1px}.cal-ev-time{font-family:Space Mono,monospace;font-size:10.5px;opacity:.85}.cal-ev-title{font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.cal-ev-meta{font-size:10.5px;opacity:.8;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ev-open{background:#fdeee3;color:#8a3d10;border-left-color:var(--orange)!important}.ev-booked{background:#e3e9f7;color:var(--navy-800);border-left-color:var(--navy-700)!important}.ev-mine{background:#dff3e8;color:#1d5e3a;border-left-color:var(--green)!important}.ev-full{background:#eceef3;color:#7a8195;border-left-color:#a9afbf!important}.ev-live{background:var(--navy-950);color:#fff;border-left-color:#5fd193!important}.ev-done{background:#f4f5f8;color:#9aa3ba;border-left-color:#d5d9e4!important}.cal-legend{display:flex;gap:14px;flex-wrap:wrap;margin-top:10px;font-size:11.5px;color:var(--ink-soft)}.cal-legend .lg{display:inline-flex;align-items:center;gap:6px;background:none!important;color:var(--ink-soft)!important;border:none!important}.cal-legend 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dt{color:var(--ink-soft);font-weight:600;font-size:12px;padding-top:1px}.sheet-meta dd{margin:0}.sheet-section{border-top:1px solid var(--line);padding-top:12px;margin-top:12px}.sheet-section h4{margin:0 0 8px;font-size:13px}.sheet-link{font-size:13px;word-break:break-all;color:var(--navy-700)}.attendee{display:flex;justify-content:space-between;gap:10px;font-size:13.5px;padding:4px 0}.attendee small{color:var(--ink-soft)}.sheet-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center;border-top:1px solid var(--line);padding-top:14px;margin-top:14px}.sheet-actions .btn{width:auto}.sheet-actions .hint{margin:0;font-size:12.5px;color:var(--ink-soft)}.field-hint{font-size:11.5px;color:var(--ink-soft);margin-top:4px}.modal .form-grid label{margin-top:0}.mine-row.as-button{width:100%;background:none;border-left:none;border-right:none;border-bottom:none;text-align:left;cursor:pointer;font:inherit;color:inherit}.mine-row.as-button:hover{background:var(--paper)}.chev{font-size:20px;color:var(--ink-soft)}.status.done{position:static}@media (max-width:760px){.cal{padding:12px}.cal-toolbar{flex-direction:column;align-items:stretch}.cal-filters{justify-content:space-between}.modal-overlay{padding:0;align-items:flex-end}.modal{border-radius:16px 16px 0 0;max-height:92vh;overflow-y:auto}.sheet-meta dl{grid-template-columns:84px 1fr}}.tabs{overflow-x:auto;scrollbar-width:none}.tabs::-webkit-scrollbar{display:none}.tab{white-space:nowrap;flex-shrink:0}@media (max-width:760px){.tab{margin-right:14px}}textarea{width:100%;padding:9px 10px;border-radius:8px;border:1px solid var(--line);background:var(--paper);color:var(--ink);font-size:13.5px;font-family:inherit;line-height:1.5;resize:vertical}input[type=radio],input[type=checkbox]{width:auto}.chip{display:inline-flex;align-items:center;gap:4px;font-size:11.5px;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--paper);border:1px solid var(--line);color:var(--ink-soft);white-space:nowrap}.chip.ok{background:#3fae741f;border-color:#b9e3cd;color:#23794c}.chip.off{opacity:.55}.qcm-opt.picked{border-color:var(--orange);background:#fff4ec}.onb-screen{position:fixed;top:0;right:0;bottom:0;left:0;z-index:60;display:flex;align-items:flex-start;justify-content:center;padding:5vh 16px 16px;overflow-y:auto;background:radial-gradient(circle at top,var(--navy-800),var(--navy-950))}.onb-card{background:var(--card);border-radius:18px;padding:30px 28px;width:100%;max-width:580px;box-shadow:0 30px 60px -20px #00000080}.onb-card h2{font-family:Space Grotesk,sans-serif;font-size:22px;margin:0 0 6px}.onb-sub{color:var(--ink-soft);font-size:14px;line-height:1.5;margin:0 0 18px}.onb-progress{display:flex;gap:6px;margin-bottom:34px}.onb-dot{flex:1;height:5px;border-radius:99px;background:var(--line);position:relative}.onb-dot.on{background:var(--orange)}.onb-dot span{position:absolute;top:11px;left:0;font-size:11px;font-weight:600;color:var(--ink-soft);white-space:nowrap}.onb-dot.on span{color:var(--ink)}.onb-choices{display:grid;grid-template-columns:1fr 1fr;gap:10px}.onb-choice{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:2px;text-align:left;padding:13px 14px;min-height:54px;border:1.5px solid var(--line);border-radius:12px;background:var(--paper);color:var(--ink);font-size:14px;font-weight:600;cursor:pointer}.onb-choice small{font-weight:400;font-size:12px;color:var(--ink-soft)}.onb-choice:hover{border-color:var(--orange-dim)}.onb-choice.sel{border-color:var(--orange);background:#fff4ec;box-shadow:0 0 0 3px #e8732c29}.onb-actions{gap:8px;align-items:center;margin-top:26px}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.onb-actions .btn-small{padding:10px 16px}.start-card{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:16px;margin:4px 0 12px}.start-head{display:flex;gap:12px;align-items:center;margin-bottom:10px}.start-ic{font-size:30px;line-height:1}.start-title{font-family:Space Grotesk,sans-serif;font-weight:700;font-size:16px}.start-note{background:#fff7ee;border:1px solid #f6d9bd;color:#8a4b17;border-radius:10px;padding:10px 12px;font-size:13px;line-height:1.5;margin:8px 0}.start-steps{margin:8px 0 0;padding-left:22px;display:flex;flex-direction:column;gap:9px;font-size:14px}.start-steps .link-btn{text-align:left;line-height:1.4}.start-steps small{color:var(--ink-soft);font-weight:500}.home-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}.score-card{display:grid;grid-template-columns:auto 1fr;gap:6px 18px;align-items:center}.score-card h3{margin:0 0 2px}.score-label{font-family:Space Grotesk,sans-serif;font-weight:700;font-size:22px;color:var(--orange)}.score-detail{grid-column:1/-1;font-size:13px;line-height:1.55;color:var(--ink-soft);border-top:1px solid var(--line);padding-top:10px;margin-top:6px}.score-detail summary{cursor:pointer;font-weight:600;color:var(--ink)}.score-detail p{margin:8px 0 0}.goal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:6px}.goal-head h3{margin:0}.goal-bar{height:12px;background:var(--line);border-radius:999px;overflow:hidden;margin-top:10px}.goal-fill{height:100%;background:var(--orange);border-radius:999px;transition:width .4s}.goal-fill.ok{background:var(--green)}.streak-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:16px}.streak-num{font-family:Space Grotesk,sans-serif;font-weight:700;font-size:24px}.streak-num small{font-family:Inter,sans-serif;font-size:12px;font-weight:500;color:var(--ink-soft)}.week-dots{display:flex;gap:8px}.wd{display:flex;flex-direction:column;align-items:center;gap:3px}.wd span{width:20px;height:20px;border-radius:50%;background:var(--line)}.wd.on span{background:var(--orange)}.wd small{font-size:10px;color:var(--ink-soft);text-transform:capitalize}.goal-settings{margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}.goal-settings select{width:auto;min-width:80px}.lesson-chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}.lesson-link{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.lesson-link .hint{margin:0;font-size:12.5px;color:var(--ink-soft)}.lesson-meta{font-size:13px;line-height:1.55;color:var(--ink-soft);margin:6px 0 14px}.lsteps{display:flex;gap:6px;margin-bottom:10px}.lstep{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:9px 6px;border:1px solid var(--line);border-radius:10px;background:var(--paper);font-weight:600;font-size:13px;color:var(--ink-soft);cursor:pointer}.lstep.active{background:var(--navy-900);color:#fff;border-color:var(--navy-900)}.lstep-n{width:20px;height:20px;border-radius:50%;background:var(--line);color:var(--ink);font-size:11px;font-weight:700;display:inline-flex;align-items:center;justify-content:center}.lstep.active .lstep-n{background:var(--orange);color:#fff}.lstep.ok .lstep-n{background:var(--green);color:#fff}.lesson-item{border:1px solid var(--line);border-radius:12px;padding:14px;margin-bottom:12px}.lesson-item-head{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:4px}.lesson-text{white-space:pre-wrap;font-size:14px;line-height:1.6;background:var(--paper);border-radius:10px;padding:12px;margin-top:8px}.video-frame{position:relative;width:100%;aspect-ratio:16/9;border-radius:10px;overflow:hidden;background:#000;margin-top:10px}.video-frame iframe{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0}.qcm-q{margin-top:14px}.qcm-q-text{font-weight:600;font-size:14px;line-height:1.45}.lesson-editor{border-top:2px dashed var(--line);margin-top:22px;padding-top:14px}.lesson-editor h4{margin:0 0 10px;font-family:Space Grotesk,sans-serif;font-size:15px}.lesson-editor .inline-form{flex-wrap:wrap}.item-form{margin-top:12px;display:flex;flex-direction:column;gap:10px}.item-form .inline-form{margin:0}.qcm-builder{display:flex;flex-direction:column;gap:10px}.qcm-draft{display:flex;flex-direction:column;gap:8px;border:1px solid var(--line);border-radius:10px;background:var(--paper);padding:12px}.qcm-draft input:not([type=radio]){background:var(--card)}.qcm-draft-head{display:flex;justify-content:space-between;align-items:center;font-size:13px}.qcm-opt-row{display:flex;align-items:center;gap:8px;margin:0}.ref-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:16px;margin-bottom:20px}.ref-card{display:flex;flex-direction:column;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.ref-top{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}.ref-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto;padding-top:10px}.ref-actions a.btn-small{display:inline-block;text-decoration:none}@media (max-width:760px){.home-grid{grid-template-columns:1fr;gap:0}.onb-choices{grid-template-columns:1fr}.onb-card{padding:22px 18px}.onb-screen{padding-top:2vh}.lstep{font-size:12px;padding:8px 4px}.score-card{grid-template-columns:auto 1fr}}