/* Monegrid v2 design layer — shared across all pages */

/* ---------- background canvas ---------- */
#grid-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}
.site-content {
  position: relative;
  z-index: 1;
}

/* ---------- type ---------- */
body {
  font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
  letter-spacing: -0.011em;
}
.display {
  letter-spacing: -0.028em;
  line-height: 1.04;
}
.mono {
  font-family: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0;
}
.gradient-text {
  background: linear-gradient(110deg, #93c5fd 0%, #60a5fa 30%, #3b82f6 55%, #dbeafe 72%, #3b82f6 88%, #2563eb 100%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: sheen 7s ease-in-out infinite;
}
@keyframes sheen {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ---------- scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity 0.9s cubic-bezier(0.22, 0.8, 0.23, 1),
    transform 0.9s cubic-bezier(0.22, 0.8, 0.23, 1);
  will-change: opacity, transform;
}
.reveal.on {
  opacity: 1;
  transform: none;
}
.reveal[data-d="1"] { transition-delay: 0.08s; }
.reveal[data-d="2"] { transition-delay: 0.16s; }
.reveal[data-d="3"] { transition-delay: 0.24s; }
.reveal[data-d="4"] { transition-delay: 0.32s; }
.reveal[data-d="5"] { transition-delay: 0.40s; }

/* ---------- glass cards ---------- */
.card-glass {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1.25rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color 0.35s ease, box-shadow 0.35s ease, transform 0.35s ease, background 0.35s ease;
}
.card-glass:hover {
  border-color: rgba(96, 165, 250, 0.35);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 40px rgba(59, 130, 246, 0.10), 0 12px 40px rgba(0, 0, 0, 0.35);
  transform: translateY(-3px);
}
.card-quiet {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 1.25rem;
}

/* ---------- buttons ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  border-radius: 9999px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  font-weight: 600;
  padding: 0.95rem 2.1rem;
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.18);
  transition: box-shadow 0.3s ease, transform 0.3s ease, filter 0.3s ease;
}
.btn-primary:hover {
  box-shadow: 0 10px 40px rgba(37, 99, 235, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.18);
  filter: brightness(1.06);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff;
  font-weight: 600;
  padding: 0.95rem 2.1rem;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.btn-ghost:hover {
  border-color: rgba(96, 165, 250, 0.5);
  background: rgba(255, 255, 255, 0.04);
}

/* ---------- nav ---------- */
#site-nav {
  transition: background 0.4s ease, border-color 0.4s ease, backdrop-filter 0.4s ease;
  background: rgba(6, 8, 12, 0.0);
  border-bottom: 1px solid rgba(255, 255, 255, 0);
}
#site-nav.scrolled {
  background: rgba(6, 8, 12, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

/* ---------- section dressing ---------- */
.divider-glow {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(96, 165, 250, 0.35) 35%, rgba(147, 197, 253, 0.6) 50%, rgba(96, 165, 250, 0.35) 65%, transparent);
}
.panel {
  background: rgba(10, 13, 20, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.eyebrow {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border-radius: 9999px;
  border: 1px solid rgba(96, 165, 250, 0.25);
  background: rgba(59, 130, 246, 0.08);
  color: #93c5fd;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
}

/* stat numbers */
.stat-number {
  font-variant-numeric: tabular-nums;
  background: linear-gradient(180deg, #ffffff 20%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

html { scroll-behavior: smooth; }

/* MathJax in dark cards (sigma/research) */
mjx-container { color: #e5e7eb; }
mjx-container[display="true"] { margin: 0 !important; overflow-x: auto; overflow-y: hidden; }

/* scroll cue */
@keyframes cue-bounce {
  0%, 100% { transform: translateY(0); opacity: 0.7; }
  50% { transform: translateY(8px); opacity: 1; }
}
.scroll-cue { animation: cue-bounce 2.2s ease-in-out infinite; }

/* hero parallax layer */
.hero-parallax { will-change: transform; }

/* ---------- scope-a-study configurator (home) ---------- */
.term-window {
  border-radius: 1rem;
  border: 1px solid rgba(96, 165, 250, 0.22);
  background: rgba(8, 11, 17, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 0 60px rgba(59, 130, 246, 0.10), 0 24px 60px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}
.term-head {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.8rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(255, 255, 255, 0.02);
}
.term-dot { width: 10px; height: 10px; border-radius: 9999px; display: inline-block; }
.cfg-select-wrap { position: relative; }
.cfg-select-wrap::after {
  content: "▾";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: #60a5fa;
  pointer-events: none;
  font-size: 0.8rem;
}
.cfg-select {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  color-scheme: dark;
  background: rgba(2, 6, 12, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0.65rem;
  color: #e5e7eb;
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 1rem;
  padding: 0.9rem 2.6rem 0.9rem 1.1rem;
  cursor: pointer;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.cfg-select:hover, .cfg-select:focus {
  border-color: rgba(96, 165, 250, 0.5);
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}
.cfg-big {
  font-family: Georgia, 'Times New Roman', serif;
  font-style: italic;
  letter-spacing: -0.01em;
}
.cfg-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  color: #6ee7b7;
  font-size: 0.95rem;
}
.cfg-chip::before {
  content: "";
  width: 9px; height: 9px;
  background: #34d399;
  box-shadow: 0 0 10px rgba(52, 211, 153, 0.9);
  display: inline-block;
}

/* ---------- gateway cards (home) ---------- */
.gate-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 2rem;
  border-radius: 1.25rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
  transition: border-color 0.4s ease, background 0.4s ease, transform 0.4s ease, box-shadow 0.4s ease;
}
.gate-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #60a5fa, #dbeafe, #60a5fa, transparent);
  transform: translateX(-100%);
  transition: transform 0.7s cubic-bezier(0.22, 0.8, 0.23, 1);
}
.gate-card:hover {
  border-color: rgba(96, 165, 250, 0.4);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-4px);
  box-shadow: 0 0 50px rgba(59, 130, 246, 0.12), 0 16px 44px rgba(0, 0, 0, 0.4);
}
.gate-card:hover::after { transform: translateX(0); }
.gate-card .gate-arrow {
  transition: transform 0.35s cubic-bezier(0.22, 0.8, 0.23, 1);
}
.gate-card:hover .gate-arrow { transform: translateX(6px); }

@media (prefers-reduced-motion: reduce) {
  .gradient-text { animation: none; }
  .gate-card::after { transition: none; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .scroll-cue { animation: none; }
  html { scroll-behavior: auto; }
}