:root {
  color-scheme: light;
  --ink: #10231f;
  --muted: #5b6d65;
  --paper: #f5f1e8;
  --paper-strong: #fffaf0;
  --leaf: #244f39;
  --leaf-2: #3f7b52;
  --lagoon: #0d7f8b;
  --sky: #cfe9e1;
  --sun: #f1b85b;
  --coral: #e66f58;
  --line: rgba(16, 35, 31, 0.14);
  --shadow: 0 24px 70px rgba(14, 43, 34, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 56px);
  color: #fff;
  background: linear-gradient(180deg, rgba(4, 19, 18, 0.72), rgba(4, 19, 18, 0));
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 62% 35%, var(--sun) 0 18%, transparent 19%),
    linear-gradient(145deg, var(--lagoon), var(--leaf));
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.4);
}

nav {
  display: flex;
  gap: clamp(12px, 3vw, 28px);
  font-size: 0.94rem;
  font-weight: 700;
}

nav a {
  opacity: 0.9;
}

nav a:hover {
  opacity: 1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 22px);
}

.language-picker {
  display: flex;
  gap: 6px;
  padding: 5px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 999px;
  background: rgba(4, 22, 18, 0.26);
  backdrop-filter: blur(14px);
}

.language-button {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  background: transparent;
  font-size: 0;
  line-height: 1;
  overflow: hidden;
  transition: background 160ms ease, transform 160ms ease;
}

.language-button::before {
  content: "";
  width: 22px;
  height: 22px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(16, 35, 31, 0.18);
}

.language-button[data-lang="sv"]::before {
  background:
    linear-gradient(90deg, transparent 0 32%, #fecd00 32% 45%, transparent 45%),
    linear-gradient(180deg, transparent 0 40%, #fecd00 40% 55%, transparent 55%),
    #006aa7;
}

.language-button[data-lang="en"]::before {
  background:
    linear-gradient(90deg, transparent 0 42%, #fff 42% 58%, transparent 58%),
    linear-gradient(180deg, transparent 0 42%, #fff 42% 58%, transparent 58%),
    linear-gradient(90deg, transparent 0 46%, #c8102e 46% 54%, transparent 54%),
    linear-gradient(180deg, transparent 0 46%, #c8102e 46% 54%, transparent 54%),
    linear-gradient(33deg, transparent 0 44%, #fff 44% 50%, #c8102e 50% 54%, #fff 54% 60%, transparent 60%),
    linear-gradient(147deg, transparent 0 44%, #fff 44% 50%, #c8102e 50% 54%, #fff 54% 60%, transparent 60%),
    #012169;
}

.language-button[data-lang="nl"]::before {
  background: linear-gradient(180deg, #ae1c28 0 33%, #fff 33% 66%, #21468b 66%);
}

.language-button[data-lang="ja"]::before {
  background: radial-gradient(circle at center, #bc002d 0 32%, #fff 33%);
}

.language-button:hover {
  transform: translateY(-1px);
}

.language-button.is-active {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 8px 20px rgba(4, 18, 16, 0.2);
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  padding: 112px clamp(18px, 5vw, 72px) 56px;
  overflow: hidden;
  color: #fff;
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.04) contrast(1.03);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(4, 18, 16, 0.74) 0%, rgba(4, 18, 16, 0.28) 48%, rgba(4, 18, 16, 0.1) 100%),
    linear-gradient(0deg, rgba(4, 18, 16, 0.66), rgba(4, 18, 16, 0.02) 45%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 850px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--sun);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2 {
  font-family: "Libre Baskerville", Georgia, serif;
  line-height: 1.04;
}

h1 {
  max-width: 790px;
  margin-bottom: 24px;
  font-size: clamp(3rem, 6.2vw, 5.9rem);
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(2.2rem, 5vw, 4.8rem);
}

h3 {
  margin-bottom: 12px;
  font-size: 1.25rem;
}

.lead {
  max-width: 620px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.65;
}

.hero-actions,
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: var(--sun);
  color: #24170a;
}

.button.secondary,
.button.ghost {
  border-color: rgba(255, 255, 255, 0.52);
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
}

.button.ghost {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.hero-facts {
  position: absolute;
  z-index: 2;
  right: clamp(18px, 5vw, 72px);
  bottom: 56px;
  display: grid;
  gap: 10px;
  width: min(260px, 38vw);
}

.hero-facts div {
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(4, 22, 18, 0.38);
  backdrop-filter: blur(16px);
}

.hero-facts strong,
.hero-facts span {
  display: block;
}

.hero-facts strong {
  font-size: 1.55rem;
}

.hero-facts span {
  color: rgba(255, 255, 255, 0.76);
}

.section {
  padding: clamp(64px, 9vw, 120px) clamp(18px, 5vw, 72px);
}

.intro {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(280px, 1.1fr);
  gap: clamp(28px, 7vw, 96px);
  align-items: end;
  background: var(--paper-strong);
}

.intro p:last-child,
.simulation-copy p {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.75;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.species-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.species-card {
  min-height: 300px;
  display: flex;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.32)),
    radial-gradient(circle at 88% 10%, rgba(13, 127, 139, 0.18), transparent 34%);
  box-shadow: 0 16px 34px rgba(31, 63, 53, 0.08);
}

.species-card.plant {
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0.34)),
    radial-gradient(circle at 88% 10%, rgba(63, 123, 82, 0.2), transparent 34%);
}

.tag {
  align-self: flex-start;
  margin-bottom: 28px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(36, 79, 57, 0.1);
  color: var(--leaf);
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.species-card p {
  color: var(--muted);
  line-height: 1.62;
}

dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 12px;
  margin: auto 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

dt {
  color: var(--muted);
  font-weight: 700;
}

dd {
  margin: 0;
  font-weight: 800;
}

.habitats {
  background: #10231f;
  color: #f9f3e7;
}

.habitat-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  overflow: hidden;
}

.habitat-list article {
  padding: 26px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    #10231f;
}

.habitat-list span {
  display: block;
  margin-bottom: 54px;
  color: var(--sun);
  font-weight: 900;
}

.habitat-list p {
  color: rgba(249, 243, 231, 0.72);
  line-height: 1.64;
}

.simulation-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(320px, 1.28fr);
  gap: clamp(26px, 5vw, 58px);
  align-items: center;
  padding: clamp(64px, 9vw, 120px) clamp(18px, 5vw, 72px);
  background:
    radial-gradient(circle at 12% 20%, rgba(241, 184, 91, 0.24), transparent 32%),
    linear-gradient(180deg, var(--paper), #dfece1);
}

#arter,
#biotoper,
#simulering {
  scroll-margin-top: 88px;
}

.simulator {
  overflow: hidden;
  border: 1px solid rgba(16, 35, 31, 0.16);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 252, 244, 0.96), rgba(239, 247, 235, 0.86)),
    rgba(255, 250, 240, 0.8);
  box-shadow:
    0 34px 90px rgba(14, 43, 34, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.88);
}

.sim-topbar,
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
}

.sim-topbar {
  grid-template-columns: repeat(3, 1fr);
}

.sim-topbar div,
.metrics div {
  padding: 14px;
  background: rgba(255, 250, 240, 0.92);
}

.muted,
.metrics span {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

canvas {
  display: block;
  width: 100%;
  aspect-ratio: 98 / 62;
  background: #9bd6d3;
  box-shadow: inset 0 0 0 1px rgba(16, 35, 31, 0.08);
}

meter {
  width: 100%;
  height: 12px;
  margin-right: 8px;
  vertical-align: middle;
  accent-color: var(--leaf-2);
}

.metrics strong {
  display: inline-block;
  margin-top: 7px;
}

.event-log {
  min-height: 56px;
  margin: 0;
  padding: 18px;
  color: var(--muted);
  line-height: 1.55;
  background:
    linear-gradient(90deg, rgba(241, 184, 91, 0.1), transparent 42%),
    rgba(255, 255, 255, 0.62);
}

footer {
  padding: 32px clamp(18px, 5vw, 72px);
  color: rgba(249, 243, 231, 0.74);
  background: #10231f;
}

footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .hero-facts {
    position: relative;
    right: auto;
    bottom: auto;
    width: 100%;
    grid-template-columns: repeat(3, 1fr);
    margin-top: 38px;
  }

  .intro,
  .simulation-section {
    grid-template-columns: 1fr;
  }

  .species-grid,
  .habitat-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    padding: 14px 16px;
  }

  .header-actions {
    align-items: flex-end;
    flex-direction: column;
    gap: 8px;
  }

  nav {
    gap: 10px;
    font-size: 0.82rem;
  }

  .language-button {
    width: 28px;
    height: 28px;
  }

  .hero {
    min-height: 920px;
    padding: 96px 16px 34px;
  }

  .hero-facts,
  .species-grid,
  .habitat-list,
  .sim-topbar,
  .metrics {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 3rem;
  }

  .section,
  .simulation-section {
    padding-left: 16px;
    padding-right: 16px;
  }
}