/* Focused course navigation + AI coach */
.course-jumpbar{position:sticky;top:62px;z-index:28;background:rgba(8,17,29,.97);border-bottom:1px solid var(--line-soft);backdrop-filter:blur(18px)}
.course-jump-inner{min-height:56px;display:flex;align-items:center;gap:7px;padding:7px 0}.nav-square{appearance:none;width:36px;height:36px;flex:0 0 36px;display:grid;place-items:center;border:1px solid var(--line);border-radius:9px;background:transparent;color:#d9e5ef;font:inherit;font-weight:900;font-size:1rem;cursor:pointer}.nav-square:hover:not(:disabled){border-color:rgba(102,217,208,.48);background:rgba(255,255,255,.04)}.nav-square:disabled{opacity:.25;cursor:not-allowed}.course-picker-wrap{display:flex;align-items:center;gap:9px;min-width:300px;height:40px;padding:0 10px;border:1px solid var(--line);border-radius:10px;background:var(--surface)}.course-picker-label{font-size:.62rem;letter-spacing:.07em;text-transform:uppercase;color:#71869a;font-weight:800;white-space:nowrap}.course-picker{min-width:0;flex:1;border:0;background:transparent;color:var(--text);font:inherit;font-size:.82rem;font-weight:800;outline:none}.course-picker option{background:#0d1724;color:var(--text)}.course-position{white-space:nowrap;color:#6f8499;font-size:.7rem;font-weight:800;padding:0 3px}.course-rail{display:flex;gap:4px;min-width:0;flex:1;overflow-x:auto;scrollbar-width:none;padding:1px}.course-rail::-webkit-scrollbar{display:none}.rail-topic{appearance:none;min-width:34px;max-width:92px;flex:1 0 34px;height:36px;border:1px solid transparent;border-radius:8px;background:transparent;color:#8297aa;cursor:pointer;padding:3px 6px;display:flex;align-items:center;justify-content:center;gap:4px}.rail-topic span{display:grid;place-items:center;width:20px;height:20px;flex:0 0 20px;border-radius:7px;background:rgba(255,255,255,.04);color:#8297aa;font-size:.65rem;font-weight:900}.rail-topic b{font-size:.65rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.rail-topic:hover{background:rgba(255,255,255,.035);color:#c8d5e2}.rail-topic.active{background:rgba(102,217,208,.08);border-color:rgba(102,217,208,.18);color:#d8f8f5}.rail-topic.active span{background:rgba(102,217,208,.14);color:var(--accent)}.rail-topic.complete span{color:var(--good)}.ai-button{white-space:nowrap;background:rgba(126,170,247,.08);border-color:rgba(126,170,247,.2);font-size:.78rem;padding:8px 11px}.ai-button span{color:#b9a7ff}

.workspace-actions .button:disabled,.toolbar-actions .text-button:disabled{opacity:.3;cursor:not-allowed;transform:none}.coach-inline{color:#c7baff!important}.frame-help strong{color:#dbeeff}

.coach-fab{position:fixed;right:18px;bottom:18px;z-index:70;display:flex;align-items:center;gap:7px;border:1px solid rgba(148,132,224,.25);border-radius:12px;background:#121d2d;color:#ded6ff;padding:9px 12px;font:inherit;font-size:.78rem;font-weight:850;box-shadow:0 12px 34px rgba(0,0,0,.3);cursor:pointer}.coach-fab:hover{border-color:rgba(148,132,224,.5);background:#182438}.coach-backdrop{position:fixed;inset:0;z-index:79;background:rgba(2,7,13,.5);backdrop-filter:blur(2px)}.coach-panel{position:fixed;top:0;right:0;z-index:80;width:min(480px,96vw);height:100dvh;background:#0a1420;border-left:1px solid var(--line);box-shadow:-22px 0 60px rgba(0,0,0,.38);display:flex;flex-direction:column;transform:translateX(104%);transition:transform .2s ease}.coach-panel.open{transform:translateX(0)}.coach-head{padding:16px 16px 12px;display:flex;justify-content:space-between;gap:14px;border-bottom:1px solid var(--line-soft)}.coach-head h2{margin:4px 0 3px;font-size:1.25rem}.coach-controls{padding:10px 16px;display:flex;align-items:end;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line-soft);background:#0b1623}.coach-controls label{display:grid;gap:4px;min-width:190px}.coach-controls label>span{font-size:.65rem;text-transform:uppercase;letter-spacing:.07em;color:#73889d;font-weight:800}.coach-controls select{min-height:36px;border:1px solid var(--line);border-radius:8px;background:#0e1b2a;color:var(--text);padding:6px 9px;font:inherit;font-size:.78rem}.coach-status{display:flex;align-items:center;gap:6px;color:#8da2b7;font-size:.68rem;white-space:nowrap}.status-dot{width:7px;height:7px;border-radius:50%;background:var(--good)}.coach-status.thinking .status-dot{background:#ffd56a;animation:coachPulse .8s infinite alternate}.coach-status.offline .status-dot{background:var(--accent-2)}.coach-quick{padding:9px 16px;display:flex;gap:6px;overflow-x:auto;border-bottom:1px solid var(--line-soft);scrollbar-width:none}.coach-quick::-webkit-scrollbar{display:none}.coach-quick button{appearance:none;white-space:nowrap;border:1px solid var(--line);border-radius:8px;background:transparent;color:#9fb4c7;padding:6px 8px;font:inherit;font-size:.69rem;font-weight:750;cursor:pointer}.coach-quick button:hover{border-color:rgba(102,217,208,.4);color:#d9f5f3}.coach-messages{flex:1;overflow:auto;padding:14px 16px;display:flex;flex-direction:column;gap:9px;scroll-behavior:smooth}.coach-message{max-width:92%;padding:10px 12px;border:1px solid var(--line-soft);border-radius:12px;background:#0f1b2a;line-height:1.5;overflow-wrap:anywhere;font-size:.82rem}.coach-message.user{align-self:flex-end;background:rgba(59,111,143,.16);border-color:rgba(102,217,208,.15)}.coach-message.assistant{align-self:flex-start}.coach-message strong{display:block;margin-bottom:4px;font-size:.69rem;color:var(--accent)}.coach-message p{margin:0 0 7px}.coach-message p:last-child{margin-bottom:0}.coach-message ul,.coach-message ol{padding-left:18px;margin:6px 0}.coach-message code{background:#07111f;border:1px solid var(--line-soft);border-radius:5px;padding:1px 4px}.coach-compose{padding:10px 16px 12px;border-top:1px solid var(--line-soft);background:#09131f}.coach-compose textarea{width:100%;resize:none;border:1px solid var(--line);border-radius:10px;background:#07111c;color:var(--text);padding:9px 10px;font:inherit;font-size:.82rem;line-height:1.4}.coach-compose textarea:focus{outline:2px solid rgba(102,217,208,.14);border-color:rgba(102,217,208,.5)}.coach-compose-row{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:7px}.coach-note{margin:0;padding:0 16px 12px;color:#667c91;font-size:.64rem;line-height:1.4}.coach-empty{padding:12px;border:1px dashed var(--line);border-radius:10px;color:var(--muted);text-align:center}.coach-thinking{display:inline-flex;gap:4px}.coach-thinking span{width:5px;height:5px;border-radius:50%;background:var(--accent);animation:coachPulse .7s infinite alternate}.coach-thinking span:nth-child(2){animation-delay:.15s}.coach-thinking span:nth-child(3){animation-delay:.3s}@keyframes coachPulse{to{opacity:.3;transform:translateY(-2px)}}

@media(max-width:1180px){.course-rail{display:none}.course-picker-wrap{flex:1}.course-position{display:none}.ai-button{margin-left:auto}}
@media(max-width:720px){.topbar{position:relative}.course-jumpbar{top:0}.course-jump-inner{gap:5px}.course-picker-wrap{min-width:0;padding:0 7px}.course-picker-label{display:none}.course-picker{font-size:.76rem}.nav-square{width:34px;height:34px;flex-basis:34px}.course-jumpbar .ai-button{font-size:0;width:38px;height:36px;padding:0;display:grid;place-items:center}.course-jumpbar .ai-button span{font-size:.9rem}.coach-fab{right:10px;bottom:10px;padding:9px 10px}.coach-fab span{display:none}.coach-panel{width:100vw}.coach-controls{align-items:stretch;flex-direction:column}.coach-controls label{width:100%;min-width:0}.coach-status{align-self:flex-start}.coach-head{padding-top:max(16px,env(safe-area-inset-top))}.coach-message{max-width:96%}}
@media(prefers-reduced-motion:reduce){.coach-panel,.coach-fab{transition:none!important}.coach-status.thinking .status-dot,.coach-thinking span{animation:none!important}}