.bk { padding-top: clamp(6.5rem, 12vw, 8.5rem); padding-bottom: 4rem; }
.bk-wrap { max-width: 980px; }
.bk-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 400;
  color: var(--gold-bright);
  line-height: 1.15;
  margin: .4rem 0 1rem;
}
.bk-lead { color: var(--muted); font-size: 1.08rem; max-width: 42rem; margin-bottom: 1.8rem; }
.bk-modes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .7rem;
  margin-bottom: 1.8rem;
}
.bk-mode {
  min-height: 64px;
  border-radius: 14px;
  border: 1px solid var(--glass-edge);
  background: rgba(8,8,10,.7);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  padding: .9rem 1rem;
}
.bk-mode.is-on {
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  color: #140f04;
  border-color: var(--gold-bright);
}
.bk-progress {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .4rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1.4rem;
}
.bk-progress li {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 2px solid var(--glass-edge);
  padding-bottom: .45rem;
}
.bk-progress li.is-on { color: var(--gold-bright); border-color: var(--gold-bright); }
.bk-form label {
  display: flex; flex-direction: column; gap: .35rem;
  font-family: var(--font-mono); font-size: .62rem;
  letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
  margin-bottom: .75rem;
}
.bk-form input, .bk-form select, .bk-form textarea {
  width: 100%; padding: .88rem 1rem;
  border: 1px solid var(--glass-edge); border-radius: 12px;
  background: rgba(3,4,7,.45); color: var(--paper); font-size: 1rem;
}
.bk-grid2, .bk-grid3 { display: grid; gap: .7rem 1rem; }
.bk-grid2 { grid-template-columns: 1fr 1fr; }
.bk-grid3 { grid-template-columns: 1fr 1fr 1fr; }
.bk-h {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  color: var(--gold-bright);
  font-weight: 400;
  margin: 1.4rem 0 .8rem;
}
.bk-swipe-wrap { display: grid; grid-template-columns: 40px 1fr 40px; gap: .4rem; align-items: center; }
.bk-swipe {
  display: flex; gap: .8rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: .3rem 0 1rem;
}
.bk-card {
  flex: 0 0 min(78%, 260px);
  scroll-snap-align: start;
  text-align: left;
  background: rgba(8,8,10,.75);
  border: 1px solid var(--glass-edge);
  border-radius: 16px;
  overflow: hidden;
  color: var(--paper);
  cursor: pointer;
  padding: 0 0 .8rem;
  position: relative;
}
.bk-card img { width: 100%; height: 180px; object-fit: contain; display: block; background: #0a0a0c; }
.bk-card strong, .bk-card span, .bk-card em { display: block; padding: 0 .8rem; }
.bk-card strong { margin-top: .65rem; font-size: 1.05rem; }
.bk-card span, .bk-card em { color: var(--muted); font-size: .82rem; font-style: normal; margin-top: .2rem; }
.bk-card.is-on { border-color: var(--gold-bright); box-shadow: 0 0 0 2px var(--gold-bright); }
.bk-check {
  display: none;
  margin: .45rem .8rem 0;
  color: var(--gold-bright);
  font-size: .78rem;
}
.bk-card.is-on .bk-check { display: block; }
.bk-card.is-on::after {
  content: "✓";
  position: absolute;
  top: .55rem;
  right: .55rem;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--gold-bright), var(--gold));
  color: #140f04;
  font-size: .9rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}
.bk-arrow {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--glass-edge);
  background: var(--glass); color: var(--paper);
  cursor: pointer; font-size: 1.4rem;
}
.bk-nav { display: flex; gap: .8rem; margin-top: 1.2rem; flex-wrap: wrap; }
.bk-nav .btn { flex: 1; min-height: 52px; }
.bk-err { color: #f3b4b4; margin: .5rem 0; }
.bk-ok { text-align: center; padding: 2rem 1rem; }
.bk-ok h2 { font-family: var(--font-serif); color: var(--gold-bright); font-weight: 400; }
.bk-note { color: var(--muted); font-size: .92rem; margin: .6rem 0 1rem; }
.bk-sumline { color: var(--paper); margin-bottom: 1rem; }
.bk-review {
  display: grid; gap: .8rem; margin-bottom: 1.2rem;
}
.bk-rev {
  border: 1px solid var(--glass-edge);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  background: rgba(8,8,10,.45);
}
.bk-rev h3 { font-size: .95rem; color: var(--gold-bright); margin: 0 0 .4rem; display: flex; justify-content: space-between; gap: 1rem; }
.bk-rev button { background: none; border: 0; color: var(--cyan); cursor: pointer; font-size: .8rem; }
.bk-checkline {
  flex-direction: row !important;
  align-items: flex-start;
  gap: .6rem !important;
  text-transform: none !important;
  letter-spacing: .01em !important;
  font-size: .88rem !important;
  color: var(--paper) !important;
  font-family: var(--font-sans) !important;
}
.bk-checkline input { width: auto; margin-top: .2rem; accent-color: var(--gold); }
.bk-checkline a { color: var(--gold-bright); }
@media (max-width: 720px) {
  .bk-grid2, .bk-grid3 { grid-template-columns: 1fr; }
  .bk-progress { grid-template-columns: 1fr 1fr; }
  .bk-swipe-wrap { grid-template-columns: 1fr; }
  .bk-arrow { display: none; }
  .bk-card { flex-basis: 82%; }
}