:root{--bg: #0f172a;--surface: #ffffff;--muted: #64748b;--border: #e2e8f0;--primary: #4f46e5;--primary-dark: #4338ca;--at-risk: #dc2626;--developing: #d97706;--mastered: #16a34a;--soft: #f8fafc;--text: #0f172a}*{box-sizing:border-box}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}html[dir=rtl] .dir-flip{transform:scaleX(-1)}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--soft);color:var(--text)}a{color:var(--primary);text-decoration:none}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{background:var(--bg);color:#fff;padding:0 24px;height:60px;display:flex;align-items:center;justify-content:space-between}.topbar .brand{font-weight:700;letter-spacing:-.3px;font-size:18px}.topbar .brand span{color:#a5b4fc}.topbar .user{display:flex;align-items:center;gap:14px;font-size:14px}.btn{background:var(--primary);color:#fff;border:none;border-radius:8px;padding:10px 16px;font-size:14px;font-weight:600;cursor:pointer}.btn:hover{background:var(--primary-dark)}.btn.secondary{background:var(--surface);color:var(--primary);border:1px solid var(--border)}.btn.ghost{background:transparent;color:#cbd5e1;padding:6px 10px}.btn:disabled{opacity:.5;cursor:not-allowed}.container{max-width:1080px;margin:0 auto;padding:28px 24px;width:100%}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:20px;box-shadow:0 1px 2px #0000000a}.grid{display:grid;gap:16px}.grid.cols-2{grid-template-columns:repeat(2,1fr)}.grid.cols-3{grid-template-columns:repeat(3,1fr)}.grid.cols-4{grid-template-columns:repeat(4,1fr)}@media (max-width: 980px){.grid.cols-4{grid-template-columns:repeat(2,1fr)}}@media (max-width: 760px){.grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}.card>table{display:block;overflow-x:auto;white-space:nowrap}}h1{font-size:24px;margin:0 0 4px}h2{font-size:18px;margin:0 0 12px}h3{font-size:15px;margin:0 0 6px}.muted{color:var(--muted)}.pill{display:inline-block;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;text-transform:capitalize}.pill.at_risk{background:#fee2e2;color:var(--at-risk)}.pill.developing{background:#fef3c7;color:var(--developing)}.pill.mastered{background:#dcfce7;color:var(--mastered)}.pill.pending{background:#e0e7ff;color:var(--primary)}.pill.in_progress{background:#fef3c7;color:var(--developing)}.pill.completed{background:#dcfce7;color:var(--mastered)}.bar{height:8px;background:var(--border);border-radius:999px;overflow:hidden}.bar>span{display:block;height:100%;border-radius:999px}.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh}.login-card{width:100%;max-width:380px}.field{margin-bottom:14px}.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px}.field input,textarea,select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;background:var(--surface);color:var(--text)}textarea{min-height:110px;resize:vertical}.error{color:var(--at-risk);font-size:13px;margin-top:8px}.activity{border:1px solid var(--border);border-radius:12px;padding:18px;margin-bottom:16px}.activity .type{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--primary);margin-bottom:8px}.feedback{background:var(--soft);border-left:3px solid var(--primary);padding:12px 14px;border-radius:0 8px 8px 0;margin-top:12px;font-size:14px}.feedback.good{border-color:var(--mastered)}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);font-size:14px}th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase}.demo-creds{font-size:12px;color:var(--muted);margin-top:16px;line-height:1.6}.kpi{font-size:28px;font-weight:700}.stack{display:flex;flex-direction:column;gap:6px}.row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.tablewrap{overflow-x:auto;width:100%}.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);flex-wrap:wrap}.tab{background:transparent;border:none;padding:10px 16px;font-size:14px;font-weight:600;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}.tab:hover{color:var(--text)}.tab.active{color:var(--primary);border-bottom-color:var(--primary)}input[type=file]{padding:7px 10px;font-size:13px;background:var(--surface);color:var(--text)}.switch{display:inline-flex;align-items:center;gap:8px;cursor:pointer;-webkit-user-select:none;user-select:none}.switch input{display:none}.switch .slider{position:relative;width:38px;height:22px;background:#cbd5e1;border-radius:999px;transition:background .15s}.switch .slider:before{content:"";position:absolute;top:2px;left:2px;width:18px;height:18px;background:#fff;border-radius:50%;transition:transform .15s}.switch input:checked+.slider{background:var(--primary)}.switch input:checked+.slider:before{transform:translate(16px)}.switch .switch-label{font-size:12px;font-weight:600;color:var(--muted);min-width:56px}.chat{padding:0;overflow:hidden}.chat-log{padding:18px;max-height:56vh;overflow-y:auto;display:flex;flex-direction:column;gap:12px;background:var(--soft)}.bubble{max-width:78%;padding:10px 14px;border-radius:14px;font-size:14px;line-height:1.5}.bubble.tutor{align-self:flex-start;background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:4px}.bubble.student{align-self:flex-end;background:var(--primary);color:#fff;border-bottom-right-radius:4px}.bubble-who{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--primary);margin-bottom:4px}.bubble.student .bubble-text{color:#fff}.chat-input{display:flex;gap:10px;padding:14px;border-top:1px solid var(--border);background:#fff;align-items:flex-end}.chat-input textarea{flex:1;min-height:0;resize:none}.session-done{padding:18px;border-top:1px solid var(--border);background:#f0fdf4;font-size:14px}.sage-md p{margin:0 0 8px;line-height:1.6}.sage-md p:last-child{margin-bottom:0}.sage-md h3,.sage-md h4,.sage-md h5,.sage-md h6{margin:10px 0 6px}.sage-md ul.md-ul{margin:0 0 8px;padding-left:20px}.sage-md li{margin:2px 0;line-height:1.5}.sage-md code{background:#3c34891a;padding:1px 5px;border-radius:4px;font-family:var(--font-mono, monospace);font-size:.9em}.sage-md pre.md-pre{background:#1e1b2e;color:#e6e3f5;padding:10px 12px;border-radius:8px;overflow-x:auto;margin:8px 0}.sage-md pre.md-pre code{background:none;padding:0;color:inherit}.sage-md a{color:#534ab7;text-decoration:underline}.sage-md ol.md-ol{margin:0 0 8px;padding-left:20px}.chat-md p{margin:0 0 8px;line-height:1.55}.chat-md p:last-child{margin-bottom:0}.chat-md ul.md-ul,.chat-md ol.md-ol{margin:6px 0;padding-left:20px}.chat-md li{margin:2px 0}.chat-md code{background:#3c34891a;padding:1px 5px;border-radius:4px;font-family:var(--font-mono, monospace);font-size:.9em}.chat-md pre.md-pre{background:#1e1b2e;color:#e6e3f5;padding:10px 12px;border-radius:8px;overflow-x:auto;margin:8px 0}.chat-md pre.md-pre code{background:none;padding:0;color:inherit}.md-table{border-collapse:collapse;margin:8px 0;font-size:13px}.md-table th,.md-table td{border:1px solid var(--border, #e2e2ea);padding:4px 10px;text-align:center}.md-table thead th{background:#3c348914;font-weight:700}.hl-kw{color:#c4b5fd}.hl-str{color:#86efac}.hl-com{color:#9b96b5;font-style:italic}.hl-num{color:#fbbf24}
