*{box-sizing:border-box}
:root{--bg:#ffffff;--ink:#0b0b12;--mut:#666;--line:#e6e6ec;--brand:#111}
html,body,#app{height:100%}
body{margin:0;font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink)}
#app{display:flex}
.panel{width:380px;max-width:45vw;height:100%;border-right:1px solid var(--line);padding:16px;overflow:auto}
.panel h1{font-size:20px;margin:0 0 6px;font-weight:600}
.sub{font-size:13px;color:var(--mut);margin:0 0 14px}
section{border:1px solid var(--line);border-radius:14px;padding:12px;margin:12px 0}
h2{font-size:14px;margin:0 0 8px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.grid label{font-size:12px;display:flex;flex-direction:column;gap:6px}
.grid input{padding:8px 10px;border:1px solid var(--line);border-radius:10px}
textarea{width:100%;height:140px;border:1px solid var(--line);border-radius:10px;padding:8px;font-family:ui-monospace,Menlo,Monaco,monospace;font-size:12px}
.trip{grid-template-columns:repeat(3,1fr)}
.actions{display:flex;gap:8px;margin-top:8px}
button{padding:8px 12px;border-radius:10px;border:1px solid var(--line);background:var(--brand);color:#fff;cursor:pointer}
button#gpx{background:#fff;color:var(--ink)}
#map-wrap{position:relative;flex:1}
#map{position:absolute;inset:0}
.loading{position:absolute;inset:0;display:grid;place-items:center;background:radial-gradient(circle at 50% 50%, #f6f7fb, transparent 60%)}
.hidden{display:none}
.hint{font-size:11px;color:var(--mut);margin:6px 0 0}