:root {
  --bg-top: #211f22;
  --bg-bottom: #161518;
  --fog: rgba(255, 255, 255, 0.08);
  --fog-soft: rgba(255, 255, 255, 0.04);
  --panel: rgba(255, 255, 255, 0.88);
  --panel-edge: rgba(255, 255, 255, 0.5);
  --text: #242526;
  --muted: rgba(36, 37, 38, 0.68);
  --line: rgba(36, 37, 38, 0.12);
  --line-strong: rgba(36, 37, 38, 0.22);
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.1);
  --max-width: 980px;
}

@font-face {
  font-family: "Rotis";
  src:
    local("Rotis"),
    url("/fonts/RotisSansSerif.woff") format("woff");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background:
    radial-gradient(circle at 22% 18%, rgba(255, 255, 255, 0.12), transparent 24%),
    radial-gradient(circle at 78% 14%, rgba(255, 255, 255, 0.08), transparent 26%),
    radial-gradient(circle at 50% 82%, rgba(255, 255, 255, 0.05), transparent 36%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  font-family: "Rotis", system-ui, sans-serif;
  background: transparent;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 16%, var(--fog), transparent 28%),
    radial-gradient(circle at 50% 50%, var(--fog-soft), transparent 52%);
  opacity: 0.9;
}

a,
button {
  color: inherit;
}

a {
  text-decoration: none;
}

button {
  font: inherit;
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 0;
  margin: 0;
  padding: 0;
  cursor: pointer;
}

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

[data-lang] {
  display: none;
}

html[data-lang="fi"] [data-lang="fi"] {
  display: inline;
}

html[data-lang="en"] [data-lang="en"] {
  display: inline;
}

html[data-lang="fi"] h1 > [data-lang="fi"],
html[data-lang="en"] h1 > [data-lang="en"],
html[data-lang="fi"] .summary > [data-lang="fi"],
html[data-lang="en"] .summary > [data-lang="en"],
html[data-lang="fi"] .site-nav a > [data-lang="fi"],
html[data-lang="en"] .site-nav a > [data-lang="en"] {
  display: inline;
}

html[data-lang="fi"] h1 > [data-lang="fi"],
html[data-lang="en"] h1 > [data-lang="en"],
html[data-lang="fi"] .summary > [data-lang="fi"],
html[data-lang="en"] .summary > [data-lang="en"] {
  display: block;
}

.page-shell {
  min-height: 100vh;
  display: grid;
  align-items: center;
  padding: clamp(1.5rem, 4vw, 3rem);
}

.page {
  width: min(100%, var(--max-width));
  margin: 0 auto;
}

.panel {
  position: relative;
  display: grid;
  gap: clamp(1.8rem, 4vh, 2.5rem);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  border-radius: 24px;
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
  pointer-events: none;
}

.panel-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.mark {
  display: inline-flex;
  align-items: center;
  width: min(16rem, 52vw);
}

.mark img {
  width: 100%;
  height: auto;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  padding: 0.22rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  box-shadow:
    0 6px 18px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.lang-switch button {
  min-width: 2.5rem;
  padding: 0.38rem 0.62rem;
  border-radius: 999px;
  color: var(--muted);
  transition:
    color 160ms ease,
    background-color 160ms ease,
    box-shadow 160ms ease;
}

.lang-switch button[aria-pressed="true"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.lang-switch button:hover,
.lang-switch button:focus-visible {
  color: var(--text);
}

.hero-copy {
  width: min(31rem, 100%);
}

h1 {
  margin: 0;
  font-size: clamp(2.5rem, 5vw, 4.3rem);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.summary {
  width: min(22rem, 100%);
  margin: 1.2rem 0 0;
  color: var(--muted);
  line-height: 1.58;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-nav a {
  padding-bottom: 0.14rem;
  border-bottom: 1px solid transparent;
  transition:
    color 160ms ease,
    border-color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  border-color: var(--line-strong);
}

@media (max-width: 720px) {
  .page-shell {
    padding: 1rem;
  }

  .panel {
    gap: 1.5rem;
    padding: 1.25rem;
  }

  .panel-top {
    align-items: flex-start;
    flex-direction: column;
  }

  .mark {
    width: min(13.5rem, 58vw);
  }

  .hero-copy {
    width: min(24rem, 100%);
  }

  .site-nav {
    gap: 0.9rem;
  }
}