:root{--primary: #4f46e5;--primary-soft: #eef2ff;--primary-dark: #3730a3;--accent: #10b981;--warn: #f59e0b;--danger: #ef4444;--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--text: #0f172a;--muted: #64748b;--radius: 12px;--shadow: 0 1px 3px rgba(15, 23, 42, .07), 0 4px 14px rgba(15, 23, 42, .05)}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);font-size:15px}a{color:var(--primary);text-decoration:none}h1,h2,h3{margin:0 0 .4em}h1{font-size:1.5rem}h2{font-size:1.2rem}h3{font-size:1rem}p{line-height:1.55}.shell{display:flex;min-height:100vh}.sidebar{width:232px;background:var(--surface);border-right:1px solid var(--border);padding:18px 12px;position:sticky;top:0;height:100vh;overflow-y:auto;flex-shrink:0}.logo{font-weight:800;font-size:1.15rem;color:var(--primary);padding:6px 10px 16px;display:block}.logo span{color:var(--text)}.nav-item{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:8px;color:var(--text);font-weight:500;margin-bottom:2px}.nav-item:hover{background:var(--bg)}.nav-item.active{background:var(--primary-soft);color:var(--primary-dark)}.nav-section{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);padding:14px 10px 6px}.main{flex:1;padding:24px 28px;max-width:1200px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:12px;flex-wrap:wrap}.role-badge{background:var(--primary-soft);color:var(--primary-dark);border-radius:999px;padding:4px 12px;font-size:.8rem;font-weight:600}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}.grid{display:grid;gap:14px}.grid.cols2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.grid.cols3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.grid.cols4{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.stat{text-align:left}.stat .num{font-size:1.7rem;font-weight:800;color:var(--primary-dark)}.stat .lbl{color:var(--muted);font-size:.82rem}.muted{color:var(--muted)}.small{font-size:.82rem}.mt{margin-top:14px}.mb{margin-bottom:14px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spread{justify-content:space-between}.btn{display:inline-flex;align-items:center;gap:6px;background:var(--primary);color:#fff;border:none;border-radius:9px;padding:9px 16px;font-weight:600;font-size:.9rem;cursor:pointer}.btn:hover{background:var(--primary-dark)}.btn.secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}.btn.secondary:hover{background:var(--bg)}.btn.ghost{background:transparent;color:var(--primary)}.btn.danger{background:var(--danger)}.btn.green{background:var(--accent)}.btn.sm{padding:5px 11px;font-size:.8rem}.btn:disabled{opacity:.5;cursor:not-allowed}input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:9px;font:inherit;background:var(--surface);color:var(--text)}textarea{min-height:90px;resize:vertical}label{display:block;font-weight:600;font-size:.85rem;margin:12px 0 5px}.field-hint{font-size:.78rem;color:var(--muted);margin-top:3px}.chip{display:inline-flex;align-items:center;border:1.5px solid var(--border);background:var(--surface);border-radius:999px;padding:6px 13px;font-size:.84rem;cursor:pointer;margin:3px 4px 3px 0;-webkit-user-select:none;user-select:none}.chip.on{border-color:var(--primary);background:var(--primary-soft);color:var(--primary-dark);font-weight:600}.pill{border-radius:999px;padding:3px 10px;font-size:.75rem;font-weight:700}.pill.green{background:#d1fae5;color:#065f46}.pill.amber{background:#fef3c7;color:#92400e}.pill.red{background:#fee2e2;color:#991b1b}.pill.blue{background:var(--primary-soft);color:var(--primary-dark)}.pill.gray{background:#f1f5f9;color:var(--muted)}.bar{background:#eef1f6;border-radius:999px;height:9px;overflow:hidden;flex:1}.bar>div{height:100%;border-radius:999px;background:var(--primary);transition:width .4s}.bar.green>div{background:var(--accent)}.bar.amber>div{background:var(--warn)}.bar.red>div{background:var(--danger)}.bar-row{display:flex;align-items:center;gap:10px;margin:7px 0}.bar-row .bl{width:190px;font-size:.84rem;flex-shrink:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bar-row .bv{width:42px;text-align:right;font-size:.8rem;color:var(--muted);flex-shrink:0}.banner{background:#fffbeb;border:1px solid #fde68a;color:#92400e;border-radius:10px;padding:9px 14px;font-size:.86rem;margin-bottom:16px}.banner.info{background:var(--primary-soft);border-color:#c7d2fe;color:var(--primary-dark)}.chat-wrap{display:flex;flex-direction:column;height:calc(100vh - 210px);min-height:420px}.chat-scroll{flex:1;overflow-y:auto;padding:12px 4px}.msg{max-width:78%;padding:11px 15px;border-radius:16px;margin:6px 0;line-height:1.5;white-space:pre-wrap}.msg.student{background:var(--primary);color:#fff;margin-left:auto;border-bottom-right-radius:4px}.msg.tutor{background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:4px}.msg.system{background:#f1f5f9;color:var(--muted);font-size:.82rem;margin:6px auto;text-align:center}.msg-meta{font-size:.72rem;color:var(--muted);margin-top:5px}.chat-input{display:flex;gap:8px;padding-top:10px}.chat-input input{flex:1}.quick-btns{display:flex;flex-wrap:wrap;gap:6px;padding:6px 0}.wizard-steps{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px}.wstep{display:flex;align-items:center;gap:6px;font-size:.78rem;padding:5px 11px;border-radius:999px;background:var(--surface);border:1px solid var(--border);color:var(--muted)}.wstep.active{border-color:var(--primary);color:var(--primary-dark);background:var(--primary-soft);font-weight:700}.wstep.done{color:var(--accent);border-color:var(--accent)}table{width:100%;border-collapse:collapse;font-size:.88rem}th{text-align:left;color:var(--muted);font-size:.76rem;text-transform:uppercase;letter-spacing:.04em;padding:8px 10px;border-bottom:1px solid var(--border)}td{padding:10px;border-bottom:1px solid var(--border);vertical-align:top}tr:last-child td{border-bottom:none}.landing{max-width:1000px;margin:0 auto;padding:30px 20px}.hero{text-align:center;padding:48px 10px 34px}.hero h1{font-size:2.3rem;line-height:1.2;max-width:720px;margin:0 auto 16px}.hero .sub{color:var(--muted);font-size:1.08rem;max-width:620px;margin:0 auto 26px}.feature{padding:20px}.feature .ico{font-size:1.6rem;margin-bottom:8px}.focus-timer{font-size:2rem;font-weight:800;color:var(--primary-dark);font-variant-numeric:tabular-nums}.task-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--border);border-radius:10px;margin-bottom:8px;background:var(--surface)}.task-item.done{opacity:.6}.task-item.current{border-color:var(--primary);background:var(--primary-soft)}.avatar{width:42px;height:42px;border-radius:999px;background:var(--primary-soft);color:var(--primary-dark);display:inline-flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0}.divider{border-top:1px solid var(--border);margin:16px 0}.spin{display:inline-block;width:18px;height:18px;border:2.5px solid var(--border);border-top-color:var(--primary);border-radius:999px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.modal-bg{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a73;display:flex;align-items:center;justify-content:center;z-index:50;padding:16px}.modal{background:var(--surface);border-radius:14px;padding:22px;max-width:640px;width:100%;max-height:88vh;overflow-y:auto}.mono{font-family:Consolas,monospace;font-size:.8rem;background:#0f172a;color:#e2e8f0;padding:14px;border-radius:10px;white-space:pre-wrap;max-height:420px;overflow-y:auto}.coming{opacity:.55;pointer-events:none}.clickable{cursor:pointer}.clickable:hover{border-color:var(--primary)}@media (max-width: 860px){.shell{flex-direction:column}.sidebar{width:100%;height:auto;position:static;display:flex;flex-wrap:wrap;gap:4px;padding:10px}.sidebar .nav-section{display:none}.nav-item{padding:7px 11px;font-size:.85rem}.logo{padding:6px 10px;width:100%}.main{padding:16px}.bar-row .bl{width:120px}.hero h1{font-size:1.7rem}}