/* Inter (SIL Open Font License 1.1), latin subset, variable weight */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215,
    U+FEFF, U+FFFD;
}

/* Metric-compatible fallback to avoid layout shift while Inter loads */
@font-face {
  font-family: "Inter Fallback";
  src: local("Arial");
  ascent-override: 90.2%;
  descent-override: 22.48%;
  line-gap-override: 0%;
  size-adjust: 107.4%;
}

:root {
  --foreground-rgb: 0, 0, 0;
  --background-start-rgb: 214, 219, 220;
  --background-end-rgb: 255, 255, 255;
}

@media (prefers-color-scheme: dark) {
  :root {
    --foreground-rgb: 255, 255, 255;
    --background-start-rgb: 0, 0, 0;
    --background-end-rgb: 0, 0, 0;
  }
}

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

html {
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  overflow-x: hidden;
  font-family: "Inter", "Inter Fallback", ui-sans-serif, system-ui, sans-serif;
  color: rgb(var(--foreground-rgb));
  background: linear-gradient(to bottom, transparent, rgb(var(--background-end-rgb)))
    rgb(var(--background-start-rgb));
}

p {
  margin: 0;
}

a {
  color: inherit;
  text-decoration: inherit;
}

small {
  font-size: 80%;
}

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

main {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 6rem;
}

/* Logo with soft glow behind it */
.logo {
  position: relative;
  z-index: -1;
  display: flex;
  place-items: center;
}

.logo::before,
.logo::after {
  content: "";
  position: absolute;
  filter: blur(40px);
}

.logo::before {
  height: 300px;
  width: 480px;
  transform: translateX(-50%);
  border-radius: 9999px;
  background-image: radial-gradient(#fff, transparent);
}

.logo::after {
  z-index: -20;
  height: 180px;
  width: 240px;
  transform: translateX(33.333%);
  background-image: conic-gradient(
    from 180deg at 50% 50%,
    #bae6fd,
    #bfdbfe,
    rgba(191, 219, 254, 0)
  );
}

.logo {
  max-width: 100%;
  margin-top: 5rem;
}

@media (max-width: 640px) {
  main {
    padding: 4rem 1.5rem;
  }

  .logo {
    margin-top: 3rem;
  }
}

.logo img {
  position: relative;
  width: 540px;
}

/* 3D logo canvas (js/logo3d.js), larger than the logo so pieces can fly around */
.logo-3d {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(100vw, 1200px);
  height: min(560px, 110vw);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.logo.is-3d img {
  visibility: hidden;
}

@media (min-width: 1024px) {
  .logo::before {
    height: 360px;
  }
}

/* Light mode: softer glow so the logo keeps its contrast */
@media (prefers-color-scheme: light) {
  .logo::before {
    opacity: 0.45;
  }

  .logo::after {
    opacity: 0.5;
  }
}

@media (prefers-color-scheme: dark) {
  .logo::before {
    background-image: linear-gradient(to bottom right, transparent, #15803d);
    opacity: 0.1;
  }

  .logo::after {
    background-image: conic-gradient(
      from 180deg at 50% 50%,
      #0c4a6e,
      #0141ff,
      rgba(1, 65, 255, 0)
    );
    opacity: 0.2;
  }

  .logo img {
    filter: drop-shadow(0 0 0.3rem #ffffff70);
  }
}