/* assets/style.css - シンプルでモダンな UI */
:root{--bg:#f6f8fb;--card:#fff;--accent:#0ea5a3;--muted:#666}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:Inter,system-ui,Arial;background:var(--bg);color:#0b1220;padding:18px}
.container{max-width:980px;margin:0 auto}
.header h1{margin:0;font-size:1.4rem}
.lead{color:var(--muted);margin-top:6px}
.panel{background:var(--card);padding:14px;border-radius:10px;box-shadow:0 6px 18px rgba(10,10,10,.04);margin-top:12px}
.row{display:flex;gap:12px;align-items:center}
textarea{width:100%;min-height:160px;padding:10px;border:1px solid #e6eef8;border-radius:8px;font-family:inherit}
.filelabel{display:inline-block;padding:8px 12px;border-radius:8px;background:#fff;border:1px dashed #e6eef8;cursor:pointer}
.btn{padding:8px 12px;border-radius:8px;border:0;background:var(--accent);color:#fff;cursor:pointer}
.btn.ghost{background:transparent;border:1px solid #e6eef8;color:#0b1220}
.grid{display:flex;flex-wrap:wrap;gap:12px}
small, .small{color:var(--muted)}
.preview textarea[readonly]{min-height:220px;background:#f8fafb}
.actions{display:flex;align-items:center;gap:12px}
label{display:block}
input[type="text"], input[type="number"]{padding:6px;border-radius:6px;border:1px solid #e6eef8}