:root {
  --ink: #1a1f2b;
  --muted: #5b6472;
  --line: #d8dce3;
  --accent: #1e4fa3;
  --accent-dark: #163a7a;
  --ok: #1a7a3c;
  --err: #b3261e;
  --bg: #f4f6f9;
  --card: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.4;
}

header {
  background: var(--accent-dark);
  color: white;
  padding: 24px 20px;
}
header .wrap { max-width: 900px; margin: 0 auto; }
header h1 { margin: 0 0 6px; font-size: 22px; }
header p { margin: 0; color: #d7e2f7; font-size: 14px; }

.banner {
  max-width: 900px;
  margin: 16px auto 0;
  padding: 12px 16px;
  background: #eaf3ff;
  border: 1px solid #b9d3f5;
  border-radius: 8px;
  font-size: 13.5px;
  color: #17325c;
}

main { max-width: 900px; margin: 0 auto; padding: 20px 20px 100px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px;
  margin-bottom: 16px;
}

.card h2 {
  font-size: 16px;
  margin: 0 0 12px;
  color: var(--ink);
}
.card h2.collapsible {
  cursor: pointer;
  user-select: none;
}
.card h2.collapsible::before {
  content: "▾  ";
  color: var(--accent);
}
.card.collapsed h2.collapsible::before { content: "▸  "; }
.card.collapsed .grid { display: none; }

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 16px;
}
@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
}

.field { display: flex; flex-direction: column; }
.field label {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 4px;
  color: #333c48;
}
.field input, .field select, .field textarea {
  font: inherit;
  font-size: 14px;
  padding: 8px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
.field input[type="checkbox"] { width: 18px; height: 18px; align-self: flex-start; }
.field .help { font-size: 12px; color: var(--muted); margin-top: 3px; }
.field .error { font-size: 12px; color: var(--err); margin-top: 3px; min-height: 14px; }

.toolbar {
  position: sticky;
  bottom: 0;
  background: linear-gradient(to top, var(--bg) 70%, transparent);
  padding: 16px 0 8px;
  margin-top: 8px;
}
.toolbar-inner {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

button {
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  border: none;
  border-radius: 7px;
  padding: 10px 16px;
  cursor: pointer;
}
button.primary { background: var(--accent); color: white; }
button.primary:hover { background: var(--accent-dark); }
button.secondary { background: #eef1f6; color: var(--ink); }
button.secondary:hover { background: #e2e6ee; }
button.danger { background: #fdeceb; color: var(--err); }
button.danger:hover { background: #fadbd8; }

.status { font-size: 13px; margin-left: auto; }
.status.ok-text { color: var(--ok); }
.status.error-text { color: var(--err); }

footer {
  max-width: 900px;
  margin: 0 auto 40px;
  padding: 0 20px;
  font-size: 12.5px;
  color: var(--muted);
}
footer a { color: var(--accent); }