:root {
  --navy: #142a45;
  --gold: #c0913a;
  --bg: #f3f4f7;
  --card: #ffffff;
  --text: #1d2433;
  --muted: #6b7280;
  --border: #dde1e8;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: "Segoe UI", system-ui, sans-serif;
}
header {
  background: var(--navy); color: #fff; padding: 16px 24px 0;
  border-bottom: 4px solid var(--gold);
}
header h1 { margin: 0 0 12px; font-size: 20px; font-weight: 600; }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tabs a {
  color: #c8d1de; text-decoration: none; padding: 10px 18px; font-size: 14px; font-weight: 600;
  border-radius: 8px 8px 0 0;
}
.tabs a:hover { color: #fff; background: rgba(255,255,255,.08); }
.tabs a.active { background: var(--gold); color: #fff; }
main {
  display: grid; grid-template-columns: 340px 1fr; gap: 24px;
  padding: 24px; max-width: 1200px; margin: 0 auto;
}
@media (max-width: 820px) { main { grid-template-columns: 1fr; padding: 16px; } }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 20px;
}
label { display: block; font-size: 13px; font-weight: 600; margin: 14px 0 6px; }
label:first-child { margin-top: 0; }
input[type=text], input[type=number], input[type=email], textarea {
  width: 100%; padding: 9px 10px; font-size: 15px; font-family: inherit;
  border: 1px solid var(--border); border-radius: 6px; resize: vertical;
}
input:focus, textarea:focus { outline: 2px solid var(--gold); border-color: transparent; }
.row { display: flex; gap: 10px; }
.row > div { flex: 1; }
.drop {
  border: 2px dashed var(--border); border-radius: 8px; padding: 18px;
  text-align: center; cursor: pointer; color: var(--muted); font-size: 14px;
}
.drop.over, .drop:hover { border-color: var(--gold); color: var(--text); }
.drop strong { color: var(--navy); }
.check { display: flex; align-items: center; gap: 8px; font-size: 13px; margin-top: 14px; font-weight: 400; }
button {
  width: 100%; margin-top: 20px; padding: 12px; font-size: 15px; font-weight: 600;
  background: var(--gold); color: #fff; border: 0; border-radius: 6px; cursor: pointer;
}
button:disabled { background: #c9ccd3; cursor: not-allowed; }
button.secondary { background: transparent; color: var(--navy); border: 1px solid var(--border); margin-top: 10px; font-weight: 500; }
.hint { font-size: 12px; color: var(--muted); margin-top: 8px; line-height: 1.4; }
.status { font-size: 13px; margin: 10px 0 0; min-height: 1em; }
.status.ok { color: #1a7f37; }
.status.err { color: #c62828; }
.preview { display: flex; justify-content: center; align-items: flex-start; min-height: 400px; }
.preview canvas {
  max-width: 100%; height: auto; box-shadow: 0 2px 12px rgba(0,0,0,.12); display: none;
}
.empty { color: var(--muted); align-self: center; }