:root{--bg:#0b1430;--fg:#e6eefb;--panel:#183157;--panel-border:#2a4d80;--muted:#9fb7d6}.light{--bg:#f6f8fc;--fg:#0d1b2a;--panel:#fff;--panel-border:#dfe7f3;--muted:#445b78}body,html{height:100%}body{background:var(--bg);color:var(--fg);margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial}.page{min-height:100%;display:grid;place-items:start center;padding:48px 16px}.shell{width:880px;max-width:100%;background:var(--panel);border:1px solid var(--panel-border);border-radius:16px;padding:20px 24px;box-shadow:0 10px 30px rgba(0,0,0,.25)}.topnav{display:flex;gap:16px;align-items:center;padding:12px 16px}.topnav a{color:var(--fg);opacity:.9;text-decoration:none}.topnav a:hover{opacity:1;text-decoration:underline}.themeToggle{margin-left:auto;border:1px solid var(--panel-border);background:transparent;color:var(--fg);padding:6px 10px;border-radius:10px;cursor:pointer}.title{margin:0 0 6px;font-size:28px;font-weight:800}.subtitle{margin:0 0 12px;color:var(--muted);font-size:13px}.tabs{display:flex;gap:8px;margin:6px 0 12px;flex-wrap:wrap}.tab{border:1px solid var(--panel-border);background:transparent;color:var(--fg);padding:6px 10px;border-radius:999px;cursor:pointer}.tab.active{background:var(--bg)}.label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}.inputRow{display:flex;gap:10px}.vinInput{flex:1 1;padding:10px 12px;border-radius:10px}.primary,.secondary,.vinInput{border:1px solid var(--panel-border);background:transparent;color:var(--fg)}.primary,.secondary{padding:10px 14px;border-radius:10px;cursor:pointer}.primary{background:var(--bg)}.result{margin-top:14px}.pre{margin:0;padding:12px;border-radius:12px;border:1px solid var(--panel-border);background:rgba(0,0,0,.15);overflow:auto;white-space:pre-wrap;word-break:break-word}.pre.error{background:rgba(128,0,0,.15)}