:root {
  --bg:           #e8d88a;
  --navbar-bg:    rgba(0,0,0,0.75);
  --red:          #cc1a1a;
  --red-bright:   #ff2222;
  --red-muted:    #8a2020;
  --card-bg:      rgba(0,0,0,0.12);
  --card-hover:   rgba(0,0,0,0.22);
  --border:       rgba(180,30,30,0.3);
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  background-color: var(--bg);
  color: var(--red);
  font-family: 'Share Tech Mono', monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 3px,
    rgba(0,0,0,0.04) 3px,
    rgba(0,0,0,0.04) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

.bk-navbar {
  background-color: var(--navbar-bg) !important;
  border-bottom: 1px solid rgba(200, 30, 30, 0.4);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
  min-height: 56px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.bk-brand {
  font-family: 'Special Elite', cursive !important;
  font-size: 1.05rem !important;
  color: #ff3333 !important;
  letter-spacing: 0.12em;
}

.bk-brand-sub {
  color: #aa3333;
  font-size: 0.78rem;
}

.bk-nav-link {
  color: #dd2222 !important;
  font-size: 0.78rem !important;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.9rem 1.1rem !important;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.bk-nav-link:hover,
.bk-nav-link.active {
  color: #ff5555 !important;
  border-bottom-color: #ff3333;
  background-color: rgba(200, 30, 30, 0.15);
}

.bk-toggler {
  border-color: rgba(200,30,30,0.5) !important;
  filter: invert(0.3) sepia(1) saturate(5) hue-rotate(320deg);
}

.bk-hero {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% 55%, rgba(200,50,50,0.1) 0%, transparent 70%),
    var(--bg);
}

.bk-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(180,30,30,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180,30,30,0.07) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.bk-hero-inner {
  position: relative;
  max-width: 700px;
  padding: 3rem 1.5rem;
}

.bk-tag {
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  color: var(--red-muted);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.bk-title {
  font-family: 'Special Elite', cursive;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  color: var(--red-bright);
  line-height: 1.1;
  margin-bottom: 0.4rem;
  text-shadow: 0 0 40px rgba(200,30,30,0.3);
  animation: bk-flicker 9s infinite;
}

.bk-subtitle {
  font-family: 'Special Elite', cursive;
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: var(--red-muted);
  letter-spacing: 0.08em;
  margin-bottom: 1.8rem;
}

.bk-divider {
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--red), transparent);
  margin-bottom: 1.8rem;
}

.bk-desc {
  font-size: 0.88rem;
  line-height: 1.9;
  color: var(--red);
  max-width: 560px;
  margin-bottom: 2.2rem;
}

.bk-warning {
  display: inline-block;
  border: 1px solid var(--red);
  color: var(--red-bright);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.45rem 1.2rem;
  background: rgba(180, 30, 30, 0.12);
}

.bk-section-label {
  font-size: 0.68rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--red-muted);
}

.bk-cards-grid {
  border: 1px solid var(--border);
  background-color: var(--border);
}

.bk-card {
  background-color: var(--card-bg);
  color: var(--red);
  position: relative;
  overflow: hidden;
  transition: background-color 0.2s;
  outline: 1px solid var(--border);
}

.bk-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--red-bright);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.bk-card:hover {
  background-color: var(--card-hover);
}

.bk-card:hover::after {
  transform: scaleX(1);
}

.bk-card-icon {
  font-size: 1.6rem;
  filter: sepia(1) saturate(3) hue-rotate(320deg) brightness(0.6);
}

.bk-card-title {
  font-family: 'Special Elite', cursive;
  font-size: 1.05rem;
  color: var(--red-bright);
  letter-spacing: 0.05em;
}

.bk-card-desc {
  font-size: 0.78rem;
  color: var(--red);
  line-height: 1.75;
  margin-bottom: 0;
}

.bk-card-count {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--red-muted);
  text-transform: uppercase;
}

.bk-info-strip {
  border: 1px solid var(--border);
  background-color: var(--border);
}

.bk-info-block {
  background-color: var(--card-bg);
  outline: 1px solid var(--border);
}

.bk-info-title {
  font-family: 'Special Elite', cursive;
  font-size: 0.95rem;
  color: var(--red-bright);
  letter-spacing: 0.08em;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.1rem;
}

.bk-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.bk-list li {
  font-size: 0.8rem;
  color: var(--red);
  line-height: 1.85;
  padding: 0.15rem 0;
}

.bk-list li::before {
  content: '›  ';
  color: var(--red-bright);
}

.bk-info-text {
  font-size: 0.8rem;
  color: var(--red);
  line-height: 1.85;
}

.bk-link {
  color: var(--red-bright);
  text-decoration: underline;
}

.bk-link:hover {
  color: #ff6666;
}

.bk-footer {
  border-top: 1px solid var(--border);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--red-muted);
  text-transform: uppercase;
  background-color: rgba(0,0,0,0.08);
}

@keyframes bk-flicker {
  0%, 94%, 100% { opacity: 1; }
  95%           { opacity: 0.82; }
  96%           { opacity: 1; }
  97.5%         { opacity: 0.55; }
  98%           { opacity: 1; }
}