/* Trove standalone identity — cool slate + amber, not PE forest / KM paper */
:root {
  --void: #0b0e12;
  --slate: #12171f;
  --slate-mid: #1c2430;
  --steel: #3d5a6c;
  --steel-bright: #5a7d92;
  --mist: #a8b8c4;
  --fog: #d6dde4;
  --snow: #eef1f4;
  --amber: #c4a574;
  --amber-soft: #dbcaa8;
  --ink: #e8ecef;
  --ink-muted: #9aa8b5;

  --font-display: "Syne", "Avenir Next", "Segoe UI", sans-serif;
  --font-body: "Source Sans 3", "Avenir Next", "Segoe UI", sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--void);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

.concepts-back {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.4rem 0.65rem;
  background: color-mix(in srgb, var(--slate) 88%, transparent);
  border: 1px solid color-mix(in srgb, var(--fog) 14%, transparent);
  color: var(--mist);
  backdrop-filter: blur(8px);
}

.concepts-back:hover {
  color: var(--snow);
  border-color: color-mix(in srgb, var(--amber) 40%, transparent);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  from {
    transform: scale(1.02) translateY(0);
  }
  to {
    transform: scale(1.06) translateY(-1.5%);
  }
}

@keyframes glow-pulse {
  0%,
  100% {
    opacity: 0.45;
  }
  50% {
    opacity: 0.75;
  }
}