:root{--bg:#f4f6f9;--surface:#fff;--surface-2:#fafbfc;--surface-3:#f1f3f6;--border:#e5e8ee;--border-strong:#d5dae3;--text:#0f172a;--text-2:#475569;--text-3:#8a94a6;--accent:#2563eb;--accent-600:#1d4ed8;--accent-soft:#eef4ff;--accent-border:#c7dbff;--ok:#15803d;--ok-soft:#eafaf0;--warn:#b45309;--warn-soft:#fff6e8;--danger:#dc2626;--danger-soft:#fdeeee;--radius-sm:8px;--radius:12px;--radius-lg:16px;--shadow-sm:0 1px 2px #0f172a0d, 0 1px 1px #0f172a08;--shadow:0 4px 16px -4px #0f172a1a, 0 1px 3px #0f172a0d;--shadow-lg:0 18px 40px -20px #0f172a47;--sans:system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;font-family:var(--sans);color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{background:radial-gradient(1100px 520px at 92% -12%, #eaf1ff 0%, #eaf1ff00 62%), var(--bg);min-height:100svh;margin:0}#root{min-height:100svh}button{font-family:inherit}input,button{font:inherit}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--radius-sm)}.app{max-width:1180px;margin:0 auto;padding:32px 24px 48px}.topbar{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:24px;display:flex}.brand{align-items:center;gap:12px;display:flex}.brand__mark{background:linear-gradient(150deg, var(--accent), #4f46e5);width:40px;height:40px;box-shadow:var(--shadow);color:#fff;letter-spacing:.5px;border-radius:11px;place-items:center;font-size:17px;font-weight:700;display:grid}.brand__title{letter-spacing:-.2px;margin:0;font-size:20px;font-weight:650}.brand__sub{color:var(--text-2);margin:2px 0 0;font-size:13px}.topbar__links{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.link-pill{border:1px solid var(--border);background:var(--surface);height:34px;color:var(--text-2);box-shadow:var(--shadow-sm);border-radius:999px;align-items:center;gap:6px;padding:0 12px;font-size:13px;text-decoration:none;transition:color .16s,border-color .16s,transform .16s;display:inline-flex}.link-pill:hover{color:var(--accent-600);border-color:var(--accent-border);transform:translateY(-1px)}.workspace{grid-template-columns:minmax(0,1fr) 340px;align-items:start;gap:24px;display:grid}@media (width<=900px){.workspace{grid-template-columns:minmax(0,1fr)}}.stage-card,.rail-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow)}.stage-card{overflow:hidden}.stage-card__head{border-bottom:1px solid var(--border);background:linear-gradient(180deg, var(--surface), var(--surface-2));justify-content:space-between;align-items:center;gap:12px;padding:14px 18px;display:flex}.stage-card__title{letter-spacing:.2px;font-size:13px;font-weight:600}.stage-card__meta{font-family:var(--mono);color:var(--text-3);font-size:12px}.stage{background-color:var(--surface-3);background-image:radial-gradient(circle at 1px 1px,#0f172a12 1px,#0000 0);background-size:18px 18px;place-items:center;min-height:320px;padding:40px 24px 48px;display:grid;overflow-x:auto}.device{flex:none;transition:padding .26s cubic-bezier(.22,1,.36,1),border-radius .26s;position:relative}.device--phone{box-shadow:var(--shadow-lg), inset 0 0 0 1px #ffffff14;background:#0f172a;border-radius:34px;padding:12px}.device--bar{box-shadow:var(--shadow-lg);background:#0f172a;border-radius:14px;padding:10px}.device--kiosk{box-shadow:var(--shadow-lg);background:#0f172a;border-radius:22px;padding:14px}.device__screen{background:var(--surface);border-radius:8px;position:relative;overflow:hidden}.device--phone .device__screen{border-radius:24px}.device__caption{text-align:center;color:var(--text-3);margin-top:14px;font-size:12px}.device__caption code{font-family:var(--mono);color:var(--text-2)}.rail{flex-direction:column;gap:16px;display:flex}.rail-card{padding:16px}.rail-card__title{letter-spacing:.06em;text-transform:uppercase;color:var(--text-3);margin:0 0 12px;font-size:12px;font-weight:650}.surface-list{flex-direction:column;gap:6px;display:flex}.surface-option{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);width:100%;min-height:44px;color:var(--text);text-align:left;cursor:pointer;justify-content:space-between;align-items:center;gap:10px;padding:9px 12px;font-size:13px;transition:border-color .14s,background .14s,transform .14s;display:flex}.surface-option:hover{border-color:var(--border-strong);background:var(--surface-2)}.surface-option[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 1px var(--accent-border)}.surface-option__label{font-weight:550}.surface-option__dims{font-family:var(--mono);color:var(--text-3);font-size:11px}.surface-option[aria-pressed=true] .surface-option__dims{color:var(--accent-600)}.segmented{border:1px solid var(--border);background:var(--surface-3);border-radius:10px;padding:3px;display:inline-flex}.segmented button{min-height:32px;color:var(--text-2);cursor:pointer;background:0 0;border:0;border-radius:7px;padding:0 14px;font-size:12px;font-weight:600;transition:background .14s,color .14s,box-shadow .14s}.segmented button[aria-pressed=true]{background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm)}.diag{flex-direction:column;gap:10px;margin:0;display:flex}.diag__row{justify-content:space-between;align-items:center;gap:12px;font-size:13px;display:flex}.diag__key{color:var(--text-2)}.chip{white-space:nowrap;border:1px solid #0000;border-radius:999px;align-items:center;gap:6px;min-height:24px;padding:0 9px;font-size:11.5px;font-weight:600;display:inline-flex}.chip--ok{background:var(--ok-soft);color:var(--ok);border-color:#cdeed8}.chip--warn{background:var(--warn-soft);color:var(--warn);border-color:#f6e2c0}.chip--danger{background:var(--danger-soft);color:var(--danger);border-color:#f6cfcf}.chip--neutral{background:var(--surface-3);color:var(--text-2);border-color:var(--border)}.chip code{font-family:var(--mono);font-size:11px}.slider-head{justify-content:space-between;align-items:baseline;margin-bottom:8px;display:flex}.slider-label{font-size:13px;font-weight:600}.slider-value{font-family:var(--mono);color:var(--accent-600);font-size:13px}input[type=range]{appearance:none;background:linear-gradient(90deg, var(--accent) 0%, var(--accent) var(--fill,0%), var(--surface-3) var(--fill,0%), var(--surface-3) 100%);border-radius:999px;outline:none;width:100%;height:6px;margin:6px 0 4px}input[type=range]::-webkit-slider-thumb{appearance:none;background:var(--surface);border:2px solid var(--accent);width:18px;height:18px;box-shadow:var(--shadow-sm);cursor:pointer;border-radius:50%;transition:transform .12s}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.08)}input[type=range]::-moz-range-thumb{background:var(--surface);border:2px solid var(--accent);cursor:pointer;border-radius:50%;width:16px;height:16px}.btn{border:1px solid var(--border);background:var(--surface);min-height:36px;color:var(--text-2);cursor:pointer;border-radius:9px;justify-content:center;align-items:center;padding:0 14px;font-size:12.5px;font-weight:600;transition:background .14s,border-color .14s,color .14s;display:inline-flex}.btn:hover{background:var(--surface-2);border-color:var(--border-strong);color:var(--text)}.btn-row{align-items:center;gap:8px;display:flex}.hint{color:var(--text-3);margin:10px 0 0;font-size:12px;line-height:1.5}.switch{min-height:44px;color:var(--text-2);cursor:pointer;align-items:center;gap:10px;font-size:13px;display:flex}.switch input{width:16px;height:16px;accent-color:var(--accent)}.footer{color:var(--text-3);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-top:28px;font-size:12px;display:flex}.footer code{font-family:var(--mono);color:var(--text-2)}.preset-row{flex-wrap:wrap;gap:6px;margin-bottom:12px;display:flex}.preset{border:1px solid var(--border);background:var(--surface-2);min-height:30px;color:var(--text-2);cursor:pointer;border-radius:999px;padding:0 10px;font-size:11.5px;font-weight:600;transition:border-color .14s,background .14s,color .14s}.preset:hover{border-color:var(--accent-border);background:var(--accent-soft);color:var(--accent-600)}.surface-form{flex-direction:column;gap:10px;display:flex}.field-grid{grid-template-columns:1fr 1fr;align-items:end;gap:8px;display:grid}.field-grid--4{grid-template-columns:repeat(4,1fr)}.field{flex-direction:column;gap:4px;min-width:0;display:flex}.field__label{color:var(--text-3);font-size:11px;font-weight:600}.field input,.field select{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);width:100%;min-height:34px;color:var(--text);font:inherit;padding:0 9px;font-size:13px}.field input:focus,.field select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);outline:none}.switch--field{min-height:34px}.btn--primary{border-color:var(--accent);background:var(--accent);color:#fff}.btn--primary:hover{border-color:var(--accent-600);background:var(--accent-600);color:#fff}.form-error{border-radius:var(--radius-sm);background:var(--danger-soft);color:var(--danger);font-family:var(--mono);overflow-wrap:anywhere;margin:0;padding:8px 10px;font-size:11.5px;line-height:1.5}.profile-code{color:var(--text-2);margin-top:12px;font-size:12px}.profile-code summary{cursor:pointer;font-weight:600}.profile-code pre{border-radius:var(--radius-sm);background:var(--surface-3);font-family:var(--mono);margin:8px 0 0;padding:10px;font-size:11px;line-height:1.5;overflow-x:auto}.hint code{font-family:var(--mono);font-size:11px}