:root{--bg-top:#e0f2fe;--bg-bottom:#f8fafc;--card:#fff;--text:#0f172a;--muted:#64748b;--border:#e2e8f0;--surface:#f8fafc;--accent:#0e7490;--accent-strong:#155e75;--heat:#f97316;--filter:#0ea5e9;--green:#22c55e;--yellow:#eab308;--red:#ef4444;--off:#cbd5e1;--radius:18px;--shadow:0 6px 24px #0f172a14}*{box-sizing:border-box}body{min-height:100vh;color:var(--text);background:linear-gradient(var(--bg-top), var(--bg-bottom)) fixed;margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.app-header{z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);background:#ffffffd9;flex-wrap:wrap;align-items:center;gap:12px 20px;padding:12px 20px;display:flex;position:sticky;top:0}.brand{align-items:center;gap:8px;font-size:1.25rem;font-weight:700;display:flex}.brand-icon{color:var(--heat);font-size:1.4rem}.nav{background:#f1f5f9;border-radius:999px;gap:4px;padding:4px;display:flex}.nav-tab{color:var(--muted);border-radius:999px;padding:8px 16px;font-weight:600;text-decoration:none}.nav-tab.active{background:var(--card);color:var(--accent-strong);box-shadow:0 1px 4px #0f172a1f}.connection{margin-left:auto;font-size:.85rem}@media (width<=599px){.app-header{padding:10px 12px}.nav{order:3;width:100%}.nav-tab{text-align:center;flex:1}}.page{max-width:1100px;margin:0 auto;padding:20px;transition:opacity .3s}.page.stale{opacity:.55}@media (width<=599px){.page{padding:12px}}.card{border-radius:var(--radius);background:var(--card);box-shadow:var(--shadow);padding:20px}.loading{color:var(--muted);text-align:center;padding:60px 20px}.control-layout,.diagnostic-layout{gap:20px;display:grid}@media (width>=900px){.control-layout{grid-template-columns:minmax(0,2fr) minmax(280px,1fr);align-items:start}}@media (width>=760px){.diagnostic-layout{grid-template-columns:1fr 1fr;align-items:start}}.status-light{color:var(--muted);align-items:center;gap:8px;display:inline-flex}.light{background:var(--off);border-radius:50%;flex-shrink:0;width:14px;height:14px}.light-on{background:var(--green);box-shadow:0 0 0 3px #22c55e33, 0 0 12px var(--green)}.light-waiting{background:var(--yellow);animation:1.2s ease-in-out infinite pulse}.light-error{background:var(--red)}.banner{border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 12px;margin-bottom:12px;padding:12px 14px;display:flex}.banner-error{color:#991b1b;background:#fef2f2;border:1px solid #fecaca}.tub{width:100%;max-width:560px;margin:0 auto;display:block}.ground{fill:#0f172a14}.tub-shell{fill:#475569}.tub-wall{fill:none;stroke:#94a3b8;stroke-width:10px;stroke-linejoin:round}.tub-rim{stroke:#64748b;stroke-width:1.5px}.rivet{fill:#64748b}.tub-temp{fill:#fff;paint-order:stroke;stroke:#0369a199;stroke-width:4px;font-size:52px;font-weight:800}.tub-temp-caption{letter-spacing:.2em;text-transform:uppercase;fill:#e0f2fe;font-size:15px}.wave{animation:4s linear infinite wave}.wave-back{opacity:.8;animation-duration:6s;animation-direction:reverse}.duck-bob{transform-box:fill-box;transform-origin:50%;animation:2.4s ease-in-out infinite bob}.steam{opacity:0;transition:opacity 1s}.steam.on{opacity:1}.steam-puff{fill:none;stroke:#cbd5e1;stroke-width:5px;stroke-linecap:round;animation:3s ease-in-out infinite rise}.steam-puff:nth-child(2){animation-delay:1s}.steam-puff:nth-child(3){animation-delay:2s}.pumps{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;max-width:420px;margin:8px auto 0;display:grid}.pump{flex-direction:column;align-items:center;gap:6px;display:flex}.pump-svg{width:96px;height:96px}.pump-frame{fill:#f1f5f9;stroke:var(--border);stroke-width:2px}.pump-housing{fill:#1e293b}.pump-hub{fill:#e2e8f0}.fan-blades{opacity:.5;transform-box:view-box;transform-origin:60px 60px;transition:opacity .3s}.pump-heat .fan-blades{fill:var(--heat)}.pump-filter .fan-blades{fill:var(--filter)}.pump.running .fan-blades{opacity:1;animation:.9s linear infinite spin}.pump-label{font-weight:700}@media (width<=400px){.pump-svg{width:80px;height:80px}}.settings-card{flex-direction:column;gap:22px;display:flex}.field-label{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-bottom:6px;font-size:.8rem;font-weight:700;display:block}.target-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.target-value{color:var(--accent-strong);font-variant-numeric:tabular-nums;font-size:3.25rem;font-weight:800}.round-btn{background:var(--accent);color:#fff;cursor:pointer;touch-action:manipulation;border:none;border-radius:50%;width:60px;height:60px;font-size:2rem;line-height:1}.round-btn:active:not(:disabled){transform:scale(.94)}.modes{flex-direction:column;gap:14px;display:flex}.field select{border:1px solid var(--border);background:var(--surface);width:100%;font:inherit;border-radius:12px;padding:12px 14px;font-size:1.05rem}.summary{gap:10px;margin:0;display:grid}.summary div{border-bottom:1px dashed var(--border);justify-content:space-between;gap:12px;padding-bottom:8px;display:flex}.summary dt{color:var(--muted)}.summary dd{text-align:right;margin:0;font-weight:600}.btn{font:inherit;cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;padding:12px 22px;font-weight:700;display:inline-flex}.btn-primary{background:var(--accent);color:#fff}.btn-secondary{color:var(--text);background:#f1f5f9}.btn-small{color:#fff;background:#991b1b;padding:6px 12px;font-size:.875rem}.big-button{border-radius:var(--radius);width:100%;min-height:110px;box-shadow:var(--shadow);color:#fff;font:inherit;cursor:pointer;border:none;font-size:1.75rem;font-weight:800}.big-button-backflush{background:linear-gradient(135deg,#0ea5e9,#0369a1)}.big-button-setup{background:linear-gradient(135deg,#14b8a6,#0f766e)}.big-button:active:not(:disabled){transform:translateY(1px)}.round-btn:disabled,.btn:disabled,.big-button:disabled{opacity:.4;cursor:not-allowed}.backflush-slot{place-items:center;min-height:190px;margin-top:16px;display:grid}.hint{max-width:320px;color:var(--muted);text-align:center}.backflush-anim{color:var(--accent-strong);text-align:center;font-weight:600}.backflush-anim svg{width:140px;height:140px}.backflush-anim p{margin:6px 0 0}.backflush-arrows{fill:none;stroke:var(--filter);stroke-width:6px;stroke-linecap:round;transform-box:view-box;transform-origin:60px 60px;animation:2s linear infinite spin}.backflush-arrows .arrowhead{fill:var(--filter);stroke:none}.droplet{fill:#38bdf8}.droplet-eye{fill:var(--text)}.droplet-smile{fill:none;stroke:var(--text);stroke-width:2.5px;stroke-linecap:round}.bubble{fill:#7dd3fc;transform-box:fill-box;animation:1.8s ease-in infinite bubble}.bubble.b2{animation-delay:.6s}.bubble.b3{animation-delay:1.2s}.readings{margin-top:20px}.readings-header{justify-content:space-between;align-items:baseline;display:flex}.setup-state{color:var(--muted);text-transform:capitalize;font-size:.85rem}.probe-list{gap:8px;margin:8px 0 0;padding:0;list-style:none;display:grid}.probe-row{background:var(--surface);border-radius:10px;justify-content:space-between;align-items:center;padding:10px 12px;display:flex}.probe-row .status-light{color:var(--text)}.probe-value{font-variant-numeric:tabular-nums;font-weight:600}.setup-card{max-width:640px;margin:0 auto}.setup-card h1{margin:0 0 16px;font-size:1.5rem}.stepper{gap:8px;margin:0;padding:0;list-style:none;display:flex}.stepper li{border-top:4px solid var(--border);color:var(--muted);text-align:center;flex:1;padding-top:10px;font-size:.8rem}.stepper li.done,.stepper li.current{border-color:var(--accent);color:var(--accent-strong);font-weight:700}.setup-step h2{margin:24px 0 8px;font-size:1.25rem}.setup-step p{color:var(--muted);line-height:1.5}.setup-status{background:var(--surface);border-radius:12px;margin:20px 0;padding:16px}.setup-status .status-light{color:var(--text);font-size:1.1rem}.setup-status .light{width:22px;height:22px}.actions{justify-content:space-between;gap:12px;margin-top:24px;display:flex}.mock-panel{z-index:50;max-width:250px;box-shadow:var(--shadow);background:#fffbeb;border:2px dashed #f59e0b;border-radius:12px;font-size:.85rem;position:fixed;bottom:12px;right:12px}.mock-panel summary{color:#92400e;cursor:pointer;padding:8px 12px;font-weight:700}.mock-panel-body{gap:8px;padding:0 12px 12px;display:grid}.mock-panel label{align-items:center;gap:6px;display:flex}.mock-panel button{font:inherit;text-align:left;cursor:pointer;background:#fff;border:1px solid #fcd34d;border-radius:8px;padding:6px 8px}@keyframes spin{to{transform:rotate(360deg)}}@keyframes wave{to{transform:translate(-100px)}}@keyframes bob{50%{transform:translateY(4px)rotate(-4deg)}}@keyframes rise{0%{opacity:0;transform:translateY(8px)}40%{opacity:.9}to{opacity:0;transform:translateY(-14px)}}@keyframes bubble{0%{opacity:0;transform:translateY(0)}20%{opacity:1}to{opacity:0;transform:translateY(-40px)}}@keyframes pulse{50%{opacity:.35}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}}