:root{
  --bg:#f6f8fb; --card:#ffffff; --accent:#0b66ff; --muted:#6b7280; --border:#e6e9ef;
  --max-width:1100px;
}
*{box-sizing:border-box;font-family:Inter,system-ui,Segoe UI,Roboto,'Noto Sans KR',sans-serif}
body{margin:0;background:var(--bg);color:#111}
.container{max-width:var(--max-width);margin:0 auto;padding:24px}
.site-header{background:#fff;border-bottom:1px solid var(--border)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding:16px 24px}
.brand{margin:0;color:var(--accent)}
.nav a{margin-left:16px;color:var(--muted);text-decoration:none}
.hero{padding:32px 0}
.editor{display:grid;grid-template-columns:1fr 320px;gap:20px;align-items:start}
.panel{background:var(--card);border:1px solid var(--border);padding:20px;border-radius:8px}
.upload-area{border:2px dashed var(--border);padding:20px;border-radius:6px;text-align:center}
.upload-area input[type=file]{display:block;margin:8px auto}
.preview{margin-top:16px;text-align:center}
#canvas{max-width:100%;border:1px solid var(--border);background:#fff}
.controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:12px}
.controls label{font-size:14px;color:var(--muted)}
.controls input{margin-left:8px;padding:6px;border:1px solid var(--border);border-radius:4px}
.actions{margin-left:auto}
.btn{padding:8px 12px;border-radius:6px;border:1px solid var(--border);background:#fff;cursor:pointer}
.btn.primary{background:var(--accent);color:#fff;border:none}
.info{height:100%}
.site-footer{padding:20px 0;margin-top:40px;text-align:center;color:var(--muted)}

/* Start button and menu */
.start-btn{position:fixed;right:24px;bottom:24px;width:56px;height:56px;border-radius:50%;background:var(--accent);color:#fff;border:none;font-size:20px;cursor:pointer;box-shadow:0 6px 18px rgba(11,102,255,0.18)}
.tool-menu{position:fixed;right:24px;bottom:96px;width:260px;background:#fff;border:1px solid var(--border);border-radius:10px;padding:12px;box-shadow:0 10px 30px rgba(15,23,42,0.08);display:none}
.tool-menu ul{list-style:none;margin:0;padding:0}
.tool-menu li{padding:10px;border-radius:6px;margin-bottom:6px}
.tool-menu li.active{background:#f0f6ff;color:var(--accent);font-weight:600}
.tool-menu li.disabled{color:var(--muted);opacity:0.6}

@media(max-width:900px){.editor{grid-template-columns:1fr;}.tool-menu{right:12px;left:12px}}