/* Brand kit page. Tokens, fonts and base type come from flagship.css. */

.bk-hero {
  padding: clamp(56px, 8vw, 112px) 0 clamp(40px, 5vw, 64px);
}

.bk-hero .display { max-width: 12ch; }

.bk-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}

.bk-hero-mark {
  display: grid;
  aspect-ratio: 1.25;
  place-items: center;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.bk-hero-mark img { width: min(62%, 420px); }

/* Section index */
.bk-index {
  position: sticky;
  z-index: 20;
  top: 68px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.bk-index-inner {
  display: flex;
  gap: 4px;
  padding: 10px 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.bk-index-inner::-webkit-scrollbar { display: none; }

.bk-index a {
  display: inline-flex;
  min-height: 40px;
  flex: none;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  font-family: "Geist Mono", monospace;
  font-size: 12px;
  font-weight: 560;
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color var(--motion-fast) ease;
}

.bk-index a:hover { background: var(--soft); }

/* Sections */
.bk-section { padding: clamp(64px, 8vw, 112px) 0; }
.bk-section + .bk-section { border-top: 1px solid var(--line); }
.bk-section-soft { background: var(--soft); }

.bk-head {
  max-width: 780px;
  margin-bottom: clamp(32px, 4vw, 56px);
}

.bk-head .section-title { max-width: 18ch; }

.bk-sub {
  margin: clamp(40px, 5vw, 64px) 0 20px;
  font-size: clamp(22px, 2.2vw, 28px);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.bk-sub:first-child { margin-top: 0; }

.bk-note {
  max-width: 68ch;
  margin: 0 0 24px;
  color: var(--muted);
}

.bk-mono {
  font-family: "Geist Mono", monospace;
  font-size: 12px;
  font-weight: 520;
  letter-spacing: 0.08em;
}

/* Logo tiles */
.bk-logo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.bk-logo-grid.is-three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.bk-logo-tile {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.bk-logo-stage {
  display: grid;
  min-height: 220px;
  flex: 1;
  place-items: center;
  padding: 40px 32px;
}

.bk-logo-stage img { max-width: min(100%, 340px); max-height: 120px; }
.bk-logo-stage.is-mark img { max-height: 132px; }
.bk-logo-stage.on-soft { background: var(--soft); }
.bk-logo-stage.on-ink { background: var(--ink); }
.bk-logo-stage.on-lilac { background: var(--lilac); }

.bk-logo-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  padding: 16px 20px;
  border-top: 1px solid var(--line);
}

.bk-logo-meta strong { font-size: 15px; font-weight: 620; letter-spacing: -0.02em; }
.bk-logo-meta .button { min-height: 40px; padding: 8px 16px; font-size: 13px; }

/* Mark anatomy */
.bk-anatomy {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  padding: clamp(24px, 4vw, 48px);
  background: var(--soft);
  border-radius: var(--radius-lg);
}

.bk-anatomy img { width: min(100%, 260px); margin-inline: auto; }

.bk-spec-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.bk-spec-list li {
  display: grid;
  grid-template-columns: minmax(120px, 0.4fr) minmax(0, 1fr);
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.bk-spec-list span:first-child {
  font-family: "Geist Mono", monospace;
  font-size: 12px;
  font-weight: 560;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding-top: 3px;
}

/* Color */
.bk-swatch-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.bk-swatch {
  display: flex;
  min-height: 168px;
  flex-direction: column;
  justify-content: flex-end;
  padding: 16px;
  border: 1px solid rgba(5, 5, 5, 0.08);
  background: var(--swatch);
  border-radius: var(--radius-md);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: transform var(--motion-fast) var(--ease-out), box-shadow var(--motion-fast) var(--ease-out);
}

.bk-swatch:hover { box-shadow: 0 10px 24px rgba(5, 5, 5, 0.1); transform: translateY(-2px); }
.bk-swatch:active { transform: scale(0.98); }
.bk-swatch.is-dark { color: #fff; }
.bk-swatch strong { font-size: 17px; font-weight: 620; letter-spacing: -0.02em; }
.bk-swatch .bk-mono { margin-top: 4px; }
.bk-swatch small { margin-top: 8px; font-size: 13px; line-height: 1.35; opacity: 0.74; }
.bk-swatch.is-large { min-height: 220px; }

/* Type */
.bk-type-list { border-top: 1px solid var(--line); }

.bk-type-row {
  display: grid;
  grid-template-columns: minmax(180px, 0.3fr) minmax(0, 1fr);
  gap: clamp(16px, 3vw, 40px);
  align-items: baseline;
  padding: clamp(20px, 3vw, 32px) 0;
  border-bottom: 1px solid var(--line);
}

.bk-type-row dt { display: grid; gap: 6px; }
.bk-type-row dt strong { font-size: 15px; font-weight: 620; letter-spacing: -0.02em; }
.bk-type-row dd { min-width: 0; margin: 0; overflow-wrap: anywhere; }

.bk-sample-display { font-size: clamp(44px, 7vw, 94px); font-weight: 560; letter-spacing: -0.06em; line-height: 0.94; }
.bk-sample-title { font-size: clamp(32px, 5vw, 64px); font-weight: 620; letter-spacing: -0.035em; line-height: 1.02; }
.bk-sample-lede { max-width: 58ch; color: var(--muted); font-size: clamp(18px, 2vw, 22px); line-height: 1.48; }
.bk-sample-body { max-width: 62ch; font-size: 17px; line-height: 1.55; }
.bk-sample-kicker { margin: 0; }

.bk-font-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.bk-font-card {
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: var(--radius-lg);
}

.bk-font-card .bk-glyphs { margin: 18px 0 14px; font-size: clamp(34px, 4vw, 54px); font-weight: 560; letter-spacing: -0.04em; line-height: 1; }
.bk-font-card.is-mono .bk-glyphs { font-family: "Geist Mono", monospace; font-weight: 500; letter-spacing: -0.02em; }
.bk-font-card p { margin: 0; color: var(--muted); }

/* Components */
.bk-component-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.bk-component {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: var(--radius-lg);
}

.bk-component-stage {
  display: flex;
  min-height: 190px;
  flex: 1;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 32px 24px;
}

.bk-component-stage.is-column { flex-direction: column; align-items: flex-start; justify-content: center; }
.bk-component-stage .section-kicker { margin: 0; }

.bk-component-meta { padding: 18px 22px 22px; border-top: 1px solid var(--line); }
.bk-component-meta h4 { margin-bottom: 6px; font-size: 18px; letter-spacing: -0.025em; line-height: 1.2; }
.bk-component-meta p { margin: 0; color: var(--muted); font-size: 15px; }

.bk-field-row { display: grid; width: 100%; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.bk-field { display: grid; aspect-ratio: 1.2; place-items: end start; padding: 12px; border-radius: var(--radius-md); }

.bk-radius-row { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 14px; }
.bk-radius { display: grid; width: 92px; height: 92px; place-items: center; border: 1px solid var(--ink); background: var(--soft); }

.bk-focus-demo { outline: 3px solid var(--coral); outline-offset: 3px; }

/* Product themes */
.bk-theme-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.bk-theme-card {
  display: flex;
  min-height: 132px;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--soft);
  border-radius: var(--radius-md);
  color: var(--ink);
  text-decoration: none;
  transition: transform var(--motion-fast) var(--ease-out);
}

.bk-theme-card:hover { transform: translateY(-2px); }
.bk-theme-card strong { font-size: 18px; font-weight: 620; letter-spacing: -0.03em; line-height: 1.1; }
.bk-theme-card[data-theme="lilac"] { background: color-mix(in srgb, var(--lilac) 38%, white); }
.bk-theme-card[data-theme="lime"] { background: color-mix(in srgb, var(--lime) 45%, white); }
.bk-theme-card[data-theme="cream"] { background: color-mix(in srgb, var(--cream) 64%, white); }
.bk-theme-card[data-theme="coral"],
.bk-theme-card[data-theme="peach"] { background: color-mix(in srgb, var(--peach) 48%, white); }
.bk-theme-card[data-theme="pink"] { background: color-mix(in srgb, var(--pink) 48%, white); }
.bk-theme-card[data-theme="mint"] { background: color-mix(in srgb, var(--mint) 45%, white); }
.bk-theme-card[data-theme="navy"] { background: var(--navy); color: #fff; }

/* Rules */
.bk-rule-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.bk-rule-card {
  padding: clamp(24px, 3vw, 36px);
  border-radius: var(--radius-lg);
}

.bk-rule-card.is-do { background: color-mix(in srgb, var(--mint) 55%, white); }
.bk-rule-card.is-dont { background: color-mix(in srgb, var(--peach) 55%, white); }
.bk-rule-card h3 { margin-bottom: 16px; font-size: 22px; letter-spacing: -0.03em; }
.bk-rule-card ul { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.bk-rule-card li { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 10px; }
.bk-rule-card li::before { font-family: "Geist Mono", monospace; font-weight: 620; }
.bk-rule-card.is-do li::before { content: "✓"; color: var(--green); }
.bk-rule-card.is-dont li::before { content: "✕"; color: var(--coral-dark); }

.bk-retired {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  margin-top: 16px;
  padding: 24px;
  border: 1px dashed rgba(5, 5, 5, 0.3);
  border-radius: var(--radius-lg);
}

.bk-retired img { width: 150px; opacity: 0.55; filter: grayscale(1); }
.bk-retired h3 { margin-bottom: 6px; font-size: 20px; letter-spacing: -0.03em; }
.bk-retired p { margin: 0; color: var(--muted); }

.bk-name-table { width: 100%; border-collapse: collapse; }
.bk-name-table th,
.bk-name-table td { padding: 14px 16px 14px 0; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.bk-name-table th { font-family: "Geist Mono", monospace; font-size: 12px; font-weight: 560; letter-spacing: 0.1em; text-transform: uppercase; }
.bk-name-table td:first-child { font-weight: 620; white-space: nowrap; }

.bk-toast {
  position: fixed;
  z-index: 200;
  bottom: 24px;
  left: 50%;
  padding: 10px 18px;
  background: var(--ink);
  border-radius: 999px;
  color: #fff;
  font-size: 14px;
  font-weight: 560;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity var(--motion-ui) ease, transform var(--motion-ui) var(--ease-out);
}

.bk-toast.is-shown { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 1000px) {
  .bk-hero-grid,
  .bk-anatomy { grid-template-columns: 1fr; }
  .bk-swatch-grid,
  .bk-theme-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .bk-logo-grid.is-three { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .bk-logo-grid,
  .bk-logo-grid.is-three,
  .bk-font-grid,
  .bk-component-grid,
  .bk-rule-grid { grid-template-columns: 1fr; }
  .bk-swatch-grid,
  .bk-theme-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-type-row,
  .bk-spec-list li { grid-template-columns: 1fr; gap: 8px; }
  .bk-field-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bk-retired { grid-template-columns: 1fr; }
  .bk-name-table td:first-child { white-space: normal; }
}

@media (prefers-reduced-motion: reduce) {
  .bk-swatch,
  .bk-theme-card,
  .bk-toast { transition: none; }
}