:root{--ink:#1d1d1f;--muted:#6e6e73;--line:rgb(29 29 31/8%);--paper:#fff;--surface:#f5f5f7;--surface-raised:rgb(255 255 255/82%);--signal:#34c759;--accent:#0071e3;--blue:#17a6d5;--red:#e12a36;--yellow:#e0be22}*{box-sizing:border-box}html{background:var(--surface)}body{min-width:320px;min-height:100vh;margin:0;background:radial-gradient(circle at 82% 7%,rgb(196 221 255/42%),transparent 31rem),radial-gradient(circle at 10% 92%,rgb(255 221 195/25%),transparent 28rem),var(--surface);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}button,input{font:inherit}button{color:inherit}.app-shell{min-height:100vh}.topbar{position:sticky;z-index:10;top:0;display:flex;min-height:72px;align-items:center;justify-content:space-between;gap:24px;padding:12px clamp(20px,4vw,56px);border-bottom:1px solid var(--line);background:rgb(250 250 252/76%);backdrop-filter:saturate(180%) blur(28px)}.brand-lockup{display:flex;align-items:center;gap:13px}.brand-lockup>span:last-child{display:grid;gap:2px}.brand-lockup strong{font-size:15px;font-weight:650;letter-spacing:-.01em}.brand-lockup small{color:var(--muted);font-size:9px;font-weight:650;letter-spacing:.14em}.brand-mark{position:relative;display:block;width:40px;height:25px}.brand-mark i{position:absolute;left:0;display:block;width:40px;height:6px;transform:skewX(-22deg);border-radius:60% 30% 60% 30%}.brand-mark i:nth-child(1){top:1px;background:var(--blue)}.brand-mark i:nth-child(2){top:9px;width:33px;background:var(--red)}.brand-mark i:nth-child(3){top:17px;width:27px;background:var(--yellow)}.top-actions{display:flex;align-items:center;gap:9px}.button{display:inline-flex;min-height:42px;align-items:center;justify-content:center;gap:8px;padding:0 18px;border:1px solid transparent;border-radius:999px;background:transparent;font-size:13px;font-weight:600;cursor:pointer;transition:transform 160ms ease,background 160ms ease,box-shadow 160ms ease}.button:hover{transform:translateY(-1px)}.button:active{transform:translateY(0) scale(.98)}.button:focus-visible,.upload-zone:focus-within,.text-field input:focus,.range-field input:focus-visible{outline:4px solid rgb(0 113 227/18%);outline-offset:2px}.button-quiet{border-color:var(--line);background:rgb(255 255 255/78%)}.button-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px rgb(0 113 227/20%)}.button-primary:hover{background:#0077ed;box-shadow:0 10px 24px rgb(0 113 227/26%)}.button-primary span{font-size:18px;line-height:1}.workspace{display:grid;width:min(100%,1500px);min-height:calc(100vh - 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