.bk-yt {
  --yt-ink: #17243a;
  --yt-muted: #68788f;
  --yt-line: #dfe7f1;
  --yt-soft: #f5f8fc;
  --yt-blue: #1769e0;
  --yt-blue-dark: #1056bf;
  color: var(--yt-ink);
  padding: 8px 0 56px;
}
.bk-yt, .bk-yt * { box-sizing: border-box; }
.bk-yt button, .bk-yt input { font-family: inherit; }
.bk-yt-back { display: inline-flex; align-items: center; margin: 0 0 18px; padding: 9px 14px; border: 1px solid var(--yt-line); border-radius: 999px; color: var(--yt-ink); background: #fff; font-size: 14px; font-weight: 700; line-height: 1; text-decoration: none; }
.bk-yt-back:hover { border-color: var(--yt-blue); color: var(--yt-blue); }
.bk-yt-hero { max-width: 760px; margin: 0 auto 28px; text-align: center; }
.bk-yt-hero__eyebrow { display: inline-block; margin-bottom: 12px; color: var(--yt-blue); font-size: 11px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.bk-yt-hero h1 { margin: 0; color: var(--yt-ink); font-size: clamp(30px, 5vw, 46px); font-weight: 800; letter-spacing: -.04em; line-height: 1.12; }
.bk-yt-hero p { margin: 14px auto 0; color: var(--yt-muted); font-size: 16px; line-height: 1.65; }
.bk-yt-form, .bk-yt-result, .bk-yt-help { border: 1px solid var(--yt-line); border-radius: 20px; background: #fff; box-shadow: 0 18px 50px rgba(31, 54, 88, .08); }
.bk-yt-form, .bk-yt-help { padding: 22px; }
.bk-yt-form label, .bk-yt-help h2 { display: block; margin: 0 0 8px; color: #34455e; font-size: 13px; font-weight: 700; }
.bk-yt-help h2 { color: var(--yt-ink); font-size: 22px; letter-spacing: -.02em; }
.bk-yt-form__row { display: flex; gap: 10px; }
.bk-yt-form input { flex: 1 1 auto; min-width: 0; min-height: 52px; padding: 12px 14px; border: 1px solid var(--yt-line); border-radius: 12px; color: var(--yt-ink); background: var(--yt-soft); font-size: 15px; outline: none; }
.bk-yt-form input:focus { border-color: var(--yt-blue); background: #fff; box-shadow: 0 0 0 4px rgba(23, 105, 224, .12); }
.bk-yt-form button { flex: 0 0 auto; min-width: 170px; border: 0; border-radius: 12px; color: #fff; background: var(--yt-blue); cursor: pointer; font-size: 15px; font-weight: 750; }
.bk-yt-form button:hover:not(:disabled) { background: var(--yt-blue-dark); }
.bk-yt-form button:disabled { cursor: wait; opacity: .7; }
.bk-yt-form__hint { margin: 10px 0 0; color: var(--yt-muted); font-size: 13px; line-height: 1.5; }
.bk-yt-error { margin: 14px 0 0; padding: 14px 16px; border-radius: 14px; color: #8d2b2b; background: #fff1f1; font-size: 14px; line-height: 1.5; }
.bk-yt-result { margin-top: 16px; padding: 18px; }
.bk-yt-result h2 { margin: 0; font-size: 20px; letter-spacing: -.02em; }
.bk-yt-result h2 a { color: inherit; text-decoration: none; }
.bk-yt-result h2 a:hover { color: var(--yt-blue); }
.bk-yt-note { margin: 8px 0 0; color: var(--yt-muted); font-size: 13px; line-height: 1.5; }
.bk-yt-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 14px; }
.bk-yt-card { overflow: hidden; border: 1px solid var(--yt-line); border-radius: 16px; background: var(--yt-soft); }
.bk-yt-card img { display: block; width: 100%; height: auto; background: #111; }
.bk-yt-card__bar { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px; }
.bk-yt-card__bar strong { display: block; font-size: 15px; }
.bk-yt-card__bar span { display: block; margin-top: 2px; color: var(--yt-muted); font-size: 12px; }
.bk-yt-download { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; border-radius: 12px; color: #fff; background: var(--yt-blue); }
.bk-yt-download:hover { background: var(--yt-blue-dark); }
.bk-yt-help { margin-top: 16px; }
.bk-yt-help ol { margin: 12px 0 0; padding-left: 20px; color: #34455e; font-size: 15px; line-height: 1.6; }
.bk-yt-help li + li { margin-top: 8px; }
@media (max-width: 800px) {
  .bk-yt-form__row, .bk-yt-grid { display: block; }
  .bk-yt-form button { width: 100%; min-height: 48px; margin-top: 10px; }
  .bk-yt-card + .bk-yt-card { margin-top: 12px; }
}