:root {
  --bg:#ffffff; --text:#222222; --muted:#555555; --accent:#FF7323; --border:#e5e7eb;
  --ok:#166534; --err:#b91c1c;
}
* { box-sizing: border-box; }
body {
  margin:0; background:var(--bg); color:var(--text);
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  line-height:1.55;
}
.container { width:100%; max-width:840px; margin:0 auto; padding:0 16px; }
.site-header { background:#fff; }
.brand-strip { height:14px; background:var(--accent); }
.logo-bar { background:#fff; border-bottom:1px solid var(--border); }
.logo-bar .container { display:flex; justify-content:center; align-items:center; height:88px; }
.brand-logo { width:400px; max-width:100%; height:auto; display:block; }
.card {
  background:#fff; border:1px solid var(--border); border-radius:12px;
  padding:24px; margin:24px auto; max-width:100%; overflow:hidden;
}
.card h1 { font-size:clamp(22px,3.2vw,28px); margin:0 0 8px; }
.lede { color:var(--muted); margin:0 0 18px; }
.field { margin:14px 0; }
label { display:block; font-weight:700; margin:0 0 6px; }
input[type=text], textarea, input[type=file] {
  width:100%; max-width:100%; display:block;
  font:inherit; color:inherit;
  border:1px solid var(--border); border-radius:10px;
  padding:12px 14px; background:#fff;
}
textarea { min-height:160px; resize:vertical; }
.hint { font-size:12px; color:var(--muted); margin-top:6px; }
.actions { margin-top:18px; }
.btn {
  appearance:none; border:none; border-radius:10px;
  background:var(--accent); color:#fff; font-weight:800;
  padding:12px 16px; cursor:pointer;
}
.msg { margin-top:16px; border-radius:10px; padding:10px 12px; display:none; }
.msg.ok { background:#ecfdf5; color:var(--ok); border:1px solid #bbf7d0; }
.msg.err { background:#fef2f2; color:var(--err); border:1px solid #fecaca; }
.site-footer { border-top:1px solid var(--border); text-align:center; padding:18px; color:var(--muted); font-size:12px; }
@media (max-width:480px) {
  .logo-bar .container { height:72px; }
  .brand-logo { width:240px; }
  .card { padding:16px; margin:12px; }
  .btn { width:100%; padding:14px; }
}