* { box-sizing: border-box; }

:root {
  --radius: 1rem;
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: "Poppins", sans-serif;
  color: #fff;
  background: hsl(0 0% 6%);
}

h1, h2, h3 { font-weight: 500; }
h1 em, h2 em, h3 em, h1 .italic, h2 .italic, h3 .italic {
  font-family: "Source Serif 4", serif;
  font-style: italic;
  color: rgba(255, 255, 255, 0.8);
}

.video-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  filter: brightness(1.08) contrast(1.08);
}

.video-clarity {
  position: fixed;
  inset: 0;
  z-index: 1;
  background: radial-gradient(circle at 25% 20%, rgba(255, 255, 255, 0.03), transparent 40%),
    radial-gradient(circle at 80% 85%, rgba(255, 255, 255, 0.02), transparent 35%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.04), rgba(0, 0, 0, 0.1));
  pointer-events: none;
}

.surface {
  position: relative;
  z-index: 10;
}

.glass,
.glass-strong {
  position: relative;
  overflow: hidden;
}

.glass {
  background: rgba(255, 255, 255, 0.01);
  backdrop-filter: blur(4px);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

.glass-strong {
  background: rgba(255, 255, 255, 0.01);
  backdrop-filter: blur(24px);
  box-shadow: 4px 4px 4px rgba(0, 0, 0, 0.05), inset 0 1px 1px rgba(255, 255, 255, 0.15);
}

.glass::before,
.glass-strong::before {
  content: "";
  position: absolute;
  inset: 0;
  padding: 1.4px;
  border-radius: inherit;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.glass::before {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.45) 0%, rgba(255, 255, 255, 0.15) 20%, transparent 40%, transparent 60%, rgba(255, 255, 255, 0.15) 80%, rgba(255, 255, 255, 0.45) 100%);
}

.glass-strong::before {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.5) 0%, rgba(255, 255, 255, 0.2) 20%, transparent 40%, transparent 60%, rgba(255, 255, 255, 0.2) 80%, rgba(255, 255, 255, 0.5) 100%);
}

.subpage-wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 1rem;
  min-height: 100vh;
  display: grid;
  align-content: start;
  gap: 0.9rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  border-radius: 999px;
}

.brand {
  font-weight: 600;
  letter-spacing: -0.02em;
}

.mini {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.mini a,
.btn {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  padding: 0.44rem 0.75rem;
  font-size: 0.82rem;
  transition: transform 220ms ease;
}

.btn {
  font-size: 0.95rem;
  padding: 0.52rem 0.9rem;
  display: inline-block;
}

.btn:hover,
.mini a:hover { transform: scale(1.05); }

.content-panel {
  border-radius: 1.8rem;
  padding: 1.4rem;
}

.content-panel p,
.content-panel li {
  color: rgba(255, 255, 255, 0.84);
  line-height: 1.7;
}

@media (max-width: 760px) {
  .topbar {
    border-radius: 1rem;
    flex-direction: column;
    align-items: flex-start;
  }
}