:root{--studly-blue:#4a90d9;--studly-blue-dark:#357abd;--studly-blue-soft:#f0f6ff;--studly-blue-glow:#4a90d959;--text:#1a1a2e;--text-muted:#5c6d66;--surface:#fff;--surface-2:#f0f6ff;--border:#d4e8dd;--shadow:0 8px 24px #1a1a2e14;--shadow-btn:0 4px 0 #357abd;--radius:16px;--radius-sm:12px;--font:"Nunito", system-ui, sans-serif}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{min-height:100dvh;font-family:var(--font);color:var(--text);background:linear-gradient(165deg,#f0f6ff 0%,#e6f3ff 40%,#f0f6ff 100%) fixed;margin:0;font-size:17px;line-height:1.45}#root{min-height:100dvh}#root .app-shell{max-width:560px;margin:0 auto;padding:0 16px 24px}#root .app-shell.app-shell--wide{max-width:100%;padding:0}button,input,textarea{font-family:inherit}.app-shell{flex-direction:column;min-height:100dvh;padding-top:8px;display:flex}.brand-row{justify-content:center;align-items:center;gap:10px;margin-bottom:4px;display:flex}.app-shell--wide .brand-row{padding:0 16px}.brand-mascot{filter:drop-shadow(0 2px 4px var(--studly-blue-glow));font-size:2rem;line-height:1}.brand-title{letter-spacing:-.03em;color:var(--studly-blue-dark);margin:0;font-size:1.75rem;font-weight:800}.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);border:2px solid var(--border);padding:22px 20px}.card h2{color:var(--text);margin:0 0 6px;font-size:1.35rem;font-weight:800}.subtitle{color:var(--text-muted);margin:0 0 20px;font-size:.95rem}.label{color:var(--text);margin-bottom:10px;font-size:.9rem;font-weight:700;display:block}.chip-grid{flex-wrap:wrap;gap:8px;margin-bottom:20px;display:flex}.chip{border:2px solid var(--border);background:var(--surface-2);color:var(--text);cursor:pointer;border-radius:999px;padding:10px 14px;font-size:.9rem;font-weight:700;transition:background .15s,border-color .15s,transform .1s}.chip:hover{border-color:var(--studly-blue);background:var(--studly-blue-soft)}.chip:focus-visible{outline:3px solid var(--studly-blue);outline-offset:2px}.chip-selected{background:var(--studly-blue);border-color:var(--studly-blue-dark);color:#fff;box-shadow:0 2px 0 var(--studly-blue-dark)}.chip-selected:hover{background:var(--studly-blue-dark);border-color:var(--studly-blue-dark);color:#fff}.mode-card-grid{gap:12px;margin-bottom:20px;display:grid}.mode-card{text-align:left;border:2px solid var(--border);background:var(--surface-2);border-radius:var(--radius);cursor:pointer;width:100%;padding:16px;transition:border-color .15s,background .15s,transform .1s,box-shadow .15s;box-shadow:0 6px 22px #2d3a350f}.mode-card:hover:not(:disabled){border-color:var(--studly-blue);background:var(--studly-blue-soft)}.mode-card:focus-visible{outline:3px solid var(--studly-blue);outline-offset:2px}.mode-card-selected{border-color:var(--studly-blue);box-shadow:0 0 0 4px var(--studly-blue-glow)}.mode-card-inner{align-items:flex-start;gap:12px;display:flex}.mode-card-icon{filter:drop-shadow(0 2px 4px var(--studly-blue-glow));padding-top:2px;font-size:28px;line-height:1}.mode-card-title{color:var(--studly-blue-dark);margin-bottom:4px;font-size:1.08rem;font-weight:900}.mode-card-description{color:var(--text-muted);font-size:.95rem;font-weight:800;line-height:1.25}.textarea-field{border-radius:var(--radius-sm);border:2px solid var(--border);background:var(--surface-2);resize:vertical;width:100%;min-height:100px;margin-bottom:20px;padding:14px 16px;font-size:1rem;transition:border-color .15s}.textarea-field:focus{border-color:var(--studly-blue);background:var(--surface);outline:none}.btn-primary{color:#fff;background:var(--studly-blue);cursor:pointer;width:100%;box-shadow:var(--shadow-btn);border:none;border-radius:16px;padding:16px 20px;font-size:1.05rem;font-weight:800;transition:background .15s,transform .1s,box-shadow .1s;transform:translateY(0)}.btn-primary:hover{background:var(--studly-blue-dark)}.btn-primary:active{transform:translateY(3px);box-shadow:0 1px #2d8a5a}.btn-primary:disabled{opacity:.55;cursor:not-allowed;box-shadow:var(--shadow-btn);transform:none}.fixed-grade-pill{border:2px solid var(--border);color:var(--text-muted);background:#fff;border-radius:999px;justify-content:center;align-items:center;gap:8px;width:100%;margin:-4px 0 16px;padding:10px 14px;font-weight:900;display:inline-flex}.hud{flex-direction:column;gap:10px;margin-bottom:14px;display:flex}.hud-top{justify-content:space-between;align-items:center;gap:12px;display:flex}.streak-pill{color:#8a5a00;background:#fff8e6;border:2px solid #ffe0a3;border-radius:999px;align-items:center;gap:6px;padding:8px 14px;font-size:.95rem;font-weight:800;display:inline-flex;box-shadow:0 2px #e8c96a}.xp-wrap{flex:1;min-width:0}.xp-label-row{color:var(--text-muted);justify-content:space-between;align-items:baseline;margin-bottom:4px;font-size:.85rem;font-weight:700;display:flex}.xp-bar-outer{background:var(--border);border:2px solid #c5e0d2;border-radius:999px;height:14px;overflow:hidden}.xp-bar-inner{background:linear-gradient(90deg,#4a90d9,#7db8e8);border-radius:999px;height:100%;transition:width .35s ease-out}.chat-card{flex-direction:column;flex:1;min-height:min(68dvh,520px);padding:0;display:flex;overflow:hidden}.app-shell--wide .chat-card{border-left:none;border-right:none;border-radius:0;min-height:calc(100dvh - 88px)}.chat-header{border-bottom:2px solid var(--border);background:linear-gradient(180deg, var(--studly-blue-soft), #fff);justify-content:space-between;align-items:center;gap:8px;padding:14px 16px;display:flex}.chat-header-title{color:var(--studly-blue-dark);font-size:1rem;font-weight:800}.btn-ghost{border:2px solid var(--border);color:var(--text-muted);cursor:pointer;background:#fff;border-radius:12px;padding:8px 12px;font-size:.85rem;font-weight:700}.btn-ghost:hover{border-color:var(--studly-blue);color:var(--studly-blue-dark)}.messages{background:var(--surface-2);flex-direction:column;flex:1;gap:12px;padding:16px;display:flex;overflow-y:auto}.bubble{white-space:pre-wrap;word-break:break-word;border-radius:16px;max-width:92%;padding:12px 14px;font-size:.98rem;line-height:1.5}.bubble-user{background:var(--studly-blue);color:#fff;border:2px solid var(--studly-blue-dark);box-shadow:0 3px 0 var(--studly-blue-dark);align-self:flex-end}.bubble-assistant{border:2px solid var(--border);background:#fff;border-bottom-left-radius:4px;align-self:flex-start}.bubble-error{color:#8b2e2e;background:#fff0f0;border:2px solid #ffc9c9;align-self:stretch}.typing{gap:4px;padding:8px 0;display:flex}.typing span{background:var(--studly-blue);border-radius:50%;width:8px;height:8px;animation:1.2s ease-in-out infinite bounce}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}@keyframes bounce{0%,80%,to{opacity:.5;transform:translateY(0)}40%{opacity:1;transform:translateY(-6px)}}.composer{border-top:2px solid var(--border);background:#fff;padding:12px}.composer-inner{align-items:center;gap:10px;display:flex}.composer input{border:2px solid var(--border);border-radius:14px;flex:1;min-width:0;padding:12px 14px;font-size:1rem}.composer input:focus{border-color:var(--studly-blue);outline:none}.composer .btn-send{background:var(--studly-blue);color:#fff;cursor:pointer;width:52px;height:52px;box-shadow:0 3px 0 var(--studly-blue-dark);border:none;border-radius:14px;flex-shrink:0;font-size:1.25rem;font-weight:800;transition:transform .1s}.composer .btn-send:hover:not(:disabled){background:var(--studly-blue-dark)}.composer .btn-send:active:not(:disabled){box-shadow:0 1px 0 var(--studly-blue-dark);transform:translateY(2px)}.composer .btn-send:disabled{opacity:.5;cursor:not-allowed}.admin-input{border:2px solid var(--border);background:var(--surface-2);border-radius:14px;width:100%;margin-bottom:16px;padding:12px 14px;font-size:1rem}.admin-input:focus{border-color:var(--studly-blue);background:var(--surface);outline:none}.admin-file{width:100%;margin-bottom:16px}.admin-top{justify-content:space-between;align-items:center;gap:12px;display:flex}.admin-list{margin-top:18px}.admin-list-header{justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.admin-docs{flex-direction:column;gap:10px;display:flex}.admin-doc-row{border:2px solid var(--border);background:var(--surface-2);border-radius:14px;justify-content:space-between;align-items:center;gap:12px;padding:12px;display:flex}.admin-doc-title{color:var(--text);font-weight:900}.admin-doc-meta{color:var(--text-muted);font-size:.9rem;font-weight:800}.admin-delete{white-space:nowrap}.btn-mic{border:2px solid var(--border);background:var(--surface-2);width:52px;height:52px;color:var(--studly-blue-dark);cursor:pointer;border-radius:14px;flex-shrink:0;font-size:1.15rem;transition:border-color .15s,background .15s,transform .1s}.btn-mic:hover:not(:disabled){border-color:var(--studly-blue);background:var(--studly-blue-soft)}.btn-mic--listening{border-color:var(--studly-blue-dark);background:var(--studly-blue);color:#fff;box-shadow:0 3px 0 var(--studly-blue-dark)}.btn-mic:active:not(:disabled){transform:translateY(2px)}.quick-actions{gap:10px;padding:12px 12px 0;display:flex}.quick-btn{border:2px solid var(--border);background:var(--surface-2);color:var(--text);cursor:pointer;border-radius:999px;flex:1;padding:10px 12px;font-size:.95rem;font-weight:800;transition:border-color .15s,background .15s}.quick-btn:hover:not(:disabled){border-color:var(--studly-blue);background:var(--studly-blue-soft)}.quick-btn:disabled{opacity:.55;cursor:not-allowed}.task-card{background:var(--studly-blue);color:#fff;border:2px solid var(--studly-blue-dark);border-radius:16px;margin:10px 12px 0;box-shadow:0 10px 30px #4a90d940}.task-card-title{letter-spacing:.08em;text-transform:uppercase;margin-bottom:6px;font-size:.9rem;font-weight:900}.task-card-text{text-transform:uppercase;white-space:pre-wrap;word-break:break-word;font-size:1.02rem;font-weight:900;line-height:1.35}.empty-hint{text-align:center;color:var(--text-muted);padding:24px 12px;font-size:.95rem}.completion-screen{justify-content:center;align-items:center;padding:18px;display:flex}.completion-inner{text-align:center;width:100%}.completion-header{color:var(--studly-blue-dark);margin-bottom:6px;font-size:1.25rem;font-weight:900}.completion-star{filter:drop-shadow(0 10px 20px #4caf7d59);margin:8px 0 4px;font-size:74px;animation:.9s ease-out both starPop}@keyframes starPop{0%{opacity:0;transform:scale(.6)rotate(-10deg)}60%{opacity:1;transform:scale(1.12)rotate(6deg)}to{opacity:1;transform:scale(1)rotate(0)}}.completion-subtitle{margin:14px 0 10px;font-size:1.15rem;font-weight:900}.completion-points{flex-direction:column;gap:10px;margin:0 0 14px;padding:0;list-style:none;display:flex}.completion-points li{text-align:left;background:var(--surface-2);border:2px solid var(--border);border-radius:14px;padding:12px 14px;font-weight:800}.completion-xp{color:var(--text-muted);margin-bottom:16px;font-size:1rem;font-weight:900}.completion-btn{width:100%}