@import url('https://fonts.googleapis.com/css2?family=Inter:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
  --gold: #C9A36B;
  --gold-light: #D8B788;
  --gold-dark: #A8854F;
  --bg: #060708;
  --bg-card: #0A0B0D;
  --bg-elevated: #0E1014;
  --text-secondary: #A8A8A8;
  --text-muted: #6B6B6B;
}

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

html { scroll-behavior: smooth; }

html, body {
  background-color: var(--bg);
  color: #fff;
  font-family: 'Inter', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  margin: 0; padding: 0;
}

::selection { background-color: rgba(201,163,107,0.3); color: #fff; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: #0a0a0a; }
::-webkit-scrollbar-thumb { background: #1f1f1f; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #2a2a2a; }

@keyframes bplHeroDrift {
  0%, 100% { transform: scale(1) translate3d(0,0,0); }
  50% { transform: scale(1.015) translate3d(0,-0.5%,0); }
}

@keyframes bplSparkTravel {
  0%   { transform: translateX(0); opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { transform: translateX(var(--connector-width, 200px)); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ── Header ─────────────────────────────────────────── */
#bpl-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: background 0.5s, border-color 0.5s, box-shadow 0.5s;
}
#bpl-header.scrolled {
  background: rgba(6,7,8,0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(201,163,107,0.1);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
#bpl-header .bpl-hero-gradient {
  position: absolute; inset: 0; top: 0; height: 180px; pointer-events: none;
  background: linear-gradient(to bottom, rgba(6,7,8,0.92) 0%, rgba(6,7,8,0.55) 50%, rgba(6,7,8,0) 100%);
  transition: opacity 0.5s;
}
#bpl-header.scrolled .bpl-hero-gradient { opacity: 0; }

/* ── Dropdown ────────────────────────────────────────── */
.bpl-nav-item { position: relative; }
.bpl-dropdown {
  position: absolute; left: 50%; transform: translateX(-50%); top: 100%;
  padding-top: 8px; z-index: 50; pointer-events: none;
  opacity: 0; transform: translateX(-50%) translateY(-4px) scaleY(0.95);
  transform-origin: top;
  transition: opacity 0.2s, transform 0.2s;
}
.bpl-nav-item:hover .bpl-dropdown,
.bpl-dropdown:hover {
  opacity: 1; pointer-events: auto;
  transform: translateX(-50%) translateY(0) scaleY(1);
}
.bpl-dropdown-inner {
  background: #060708;
  border: 1px solid rgba(201,163,107,0.14);
  box-shadow: 0 20px 60px rgba(0,0,0,0.7);
  min-width: 270px; overflow: hidden;
}
.bpl-dropdown-top { height: 1px; background: linear-gradient(to right, transparent, rgba(201,163,107,0.7), transparent); }
.bpl-dropdown-link {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 20px;
  font-size: 0.75rem; letter-spacing: 0.04em; line-height: 1.3;
  color: rgba(255,255,255,0.9); text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.bpl-dropdown-link:hover { color: #fff; background: rgba(255,255,255,0.04); }
.bpl-dropdown-link.active { color: var(--gold); background: rgba(201,163,107,0.06); }
.bpl-dropdown-bar {
  width: 1px; height: 16px; flex-shrink: 0;
  background: transparent; transition: background 0.2s;
}
.bpl-dropdown-link:hover .bpl-dropdown-bar { background: rgba(201,163,107,0.5); }
.bpl-dropdown-link.active .bpl-dropdown-bar { background: var(--gold); }

/* ── Mobile menu ─────────────────────────────────────── */
#bpl-mobile-menu {
  max-height: 0; opacity: 0; overflow: hidden;
  transition: max-height 0.35s ease-in-out, opacity 0.3s;
}
#bpl-mobile-menu.open { max-height: 80vh; opacity: 1; overflow-y: auto; }
.bpl-mobile-section { overflow: hidden; max-height: 0; transition: max-height 0.3s ease; }
.bpl-mobile-section.open { max-height: 400px; }

/* ── Hamburger ───────────────────────────────────────── */
.bpl-ham span {
  display: block; height: 1px; background: #fff; transform-origin: center;
  transition: all 0.3s;
}
.bpl-ham span:nth-child(2) { background: var(--gold); }
.bpl-ham.open span:nth-child(1) { transform: rotate(45deg) translateY(7.5px); }
.bpl-ham.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.bpl-ham.open span:nth-child(3) { transform: rotate(-45deg) translateY(-7.5px); }

/* ── Card border ─────────────────────────────────────── */
.card-border {
  border: 1px solid rgba(201,163,107,0.12);
  background: var(--bg-card);
}

/* ── Container ───────────────────────────────────────── */
.container-x {
  width: 100%; max-width: 1200px;
  margin-left: 0; margin-right: auto;
  padding-left: 12px; padding-right: 24px;
}
@media (min-width: 768px) { .container-x { padding-left: 20px; padding-right: 40px; } }
@media (min-width: 1024px) { .container-x { padding-left: 28px; padding-right: 48px; } }

/* ── Nav active underline ────────────────────────────── */
.bpl-nav-underline {
  position: absolute; bottom: 6px; left: 16px; right: 16px; height: 1px;
  background: linear-gradient(to right, transparent, var(--gold), transparent);
  transition: opacity 0.3s, transform 0.3s;
}
.bpl-nav-link:not(.active) .bpl-nav-underline { opacity: 0; transform: scaleX(0); }
.bpl-nav-link.active .bpl-nav-underline { opacity: 1; transform: scaleX(1); }

/* ── Chevron ─────────────────────────────────────────── */
.bpl-chevron { transition: transform 0.3s; }
.bpl-nav-item:hover .bpl-chevron { transform: rotate(180deg); }

/* ── Ecosystem diagram connectors ────────────────────── */
.bpl-connector-base { opacity: 0.25; transition: opacity 0.7s; }
.bpl-connector-base.visible { opacity: 1; }
.bpl-connector-spark { animation: bplSparkTravel 2s linear infinite; opacity: 0; }
.bpl-connector-spark.active { opacity: 1; }

/* ── Section headings (glow) ─────────────────────────── */
.bpl-section-heading {
  text-align: center; color: #fff; text-transform: uppercase;
  letter-spacing: 0.32em; font-weight: 400;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  text-shadow:
    0 0 6px rgba(255,255,255,0.5),
    0 0 16px rgba(201,163,107,0.6),
    0 0 32px rgba(201,163,107,0.4),
    0 0 56px rgba(201,163,107,0.22);
}

/* ── Gold divider ────────────────────────────────────── */
.gold-divider { height: 2px; width: 40px; background: var(--gold); }

/* ── Engineering approach arrows ─────────────────────── */
.bpl-step-arrow { flex-shrink: 0; }

/* ── Footer newsletter input ─────────────────────────── */
.bpl-newsletter-form {
  display: flex; align-items: center;
  border: 1px solid rgba(201,163,107,0.3); background: transparent;
}
.bpl-newsletter-input {
  flex: 1; min-width: 0; background: transparent;
  padding: 12px 16px; font-size: 0.78rem; color: #fff;
  font-family: 'Inter', system-ui, sans-serif;
  outline: none; border: none;
}
.bpl-newsletter-input::placeholder { color: var(--text-muted); }
.bpl-newsletter-btn {
  flex-shrink: 0; width: 44px; height: 44px;
  background: var(--gold); border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s;
}
.bpl-newsletter-btn:hover { background: var(--gold-light); }

/* ── CTA button ──────────────────────────────────────── */
.bpl-cta-btn {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(201,163,107,0.5);
  padding: 10px 20px;
  font-size: 0.65rem; letter-spacing: 0.2em; text-transform: uppercase; color: #fff;
  text-decoration: none; font-family: 'Inter', system-ui, sans-serif;
  transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
  white-space: nowrap;
}
.bpl-cta-btn:hover {
  background: var(--gold); color: var(--bg); border-color: var(--gold);
  box-shadow: 0 0 20px rgba(201,163,107,0.3);
}

/* ── Image cover fill ────────────────────────────────── */
.bpl-img-fill { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.bpl-img-contain { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; object-position: center; }