:root {
  --black: #0c0c0c;
  --white: #ffffff;
  --red: #c8102e;
  --card: #f4f5f6;
  --body: #333333;
  --line: #e3e5e8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Calibri, system-ui, sans-serif;
  color: var(--body);
  background: #fafbfc;
}

.topbar {
  background: var(--black);
  color: var(--white);
  padding: 16px 24px;
}

.brand { display: flex; align-items: baseline; gap: 12px; }
.brand-mark {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 1px;
  color: var(--white);
  border-left: 4px solid var(--red);
  padding-left: 10px;
}
.brand-sub { font-size: 13px; color: #b9bcc2; }

.container {
  max-width: 880px;
  margin: 28px auto;
  padding: 0 20px;
  display: grid;
  gap: 20px;
}

.panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 24px;
}

h1 { font-size: 24px; margin: 0 0 6px; color: var(--black); }
h2 { font-size: 18px; margin: 0 0 14px; color: var(--black); }
.lead { margin: 0 0 20px; color: #5a5f66; font-size: 14px; }

.controls { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field:first-child { grid-column: 1 / -1; }
.field-label { font-size: 13px; font-weight: 600; color: var(--black); }
.hint { font-size: 12px; color: #888; }
.hint code { background: var(--card); padding: 1px 5px; border-radius: 4px; }

input[type="file"], select {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 10px;
  font-size: 14px;
  background: var(--white);
}

.actions { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }

.btn {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--black);
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--red); color: var(--white); border-color: var(--red); }
.btn-primary:not(:disabled):hover { background: #a50d26; }

.status { margin-top: 16px; font-size: 14px; min-height: 20px; }
.status.error { color: var(--red); }
.status.ok { color: #1a7f37; }

.preview { display: grid; gap: 14px; }
.slide-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.slide-card .slide-head {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--card);
  padding: 8px 14px;
  font-size: 12px;
  color: #666;
}
.slide-card .badge {
  background: var(--black); color: var(--white);
  padding: 2px 8px; border-radius: 10px; font-size: 11px;
}
.slide-card .slide-body { padding: 14px; display: grid; gap: 8px; }
.blk { font-size: 14px; }
.blk .blk-type {
  display: inline-block; min-width: 70px;
  color: var(--red); font-weight: 700; font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.blk .blk-text { color: var(--body); }

.footer {
  text-align: center;
  color: #9aa0a6;
  font-size: 12px;
  padding: 24px;
}