:root {
  --background: #080d18;
  --surface: rgba(17, 27, 46, 0.70);
  --border: rgba(176, 200, 235, 0.17);
  --text: #edf2fa;
  --muted: #a4b2c8;
  --accent: #a9c8ef;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--background);
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--background);
  font-family: Georgia, "Times New Roman", serif;
}

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

.cosmos {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(
      ellipse at 50% 0%,
      rgba(49, 77, 125, 0.28),
      transparent 58%
    ),
    linear-gradient(160deg, #101a2d, #080d18 58%, #0a1221);
}

.stars {
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background-image:
    radial-gradient(1px 1px at 12% 18%, #fff, transparent),
    radial-gradient(1px 1px at 28% 67%, #c9dcff, transparent),
    radial-gradient(2px 2px at 76% 24%, #fff, transparent),
    radial-gradient(1px 1px at 88% 76%, #c9dcff, transparent),
    radial-gradient(1px 1px at 62% 53%, #fff, transparent),
    radial-gradient(1px 1px at 43% 32%, #c9dcff, transparent),
    radial-gradient(2px 2px at 18% 84%, #fff, transparent),
    radial-gradient(1px 1px at 95% 43%, #fff, transparent);
  background-size: 420px 360px;
  animation: star-drift 45s linear infinite;
}

.nebula {
  position: absolute;
  width: 48vw;
  height: 48vw;
  min-width: 280px;
  min-height: 280px;
  border-radius: 50%;
  filter: blur(75px);
  opacity: 0.11;
}

.nebula-one {
  top: 8%;
  left: -18%;
  background: #477bc4;
}

.nebula-two {
  right: -20%;
  bottom: 0;
  background: #7355a9;
}

.world-orbit {
  position: absolute;
  left: 50%;
  top: 44%;
  border: 1px solid rgba(159, 190, 235, 0.07);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-one {
  width: min(1050px, 115vw);
  height: min(1050px, 115vw);
}

.orbit-two {
  width: min(1350px, 145vw);
  height: min(1350px, 145vw);
}

.world-page {
  position: relative;
  z-index: 1;
  width: min(1160px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 25px 32px 0;
  display: flex;
  flex-direction: column;
}

.world-header {
  position: relative;
  padding: 20px 0 42px;
  text-align: center;
}

.back-link {
  position: absolute;
  top: 8px;
  left: 0;
  color: #b6c4d9;
  font-family: Arial, sans-serif;
  font-size: 0.82rem;
  transition: color 0.2s ease;
}

.back-link:hover {
  color: white;
}

.back-link span {
  margin-right: 5px;
}

.eyebrow,
.card-category {
  font-family: Arial, sans-serif;
  font-size: 0.67rem;
  font-weight: 600;
  letter-spacing: 0.22em;
}

.world-header .eyebrow {
  margin: 32px 0 12px;
  color: #9cb8df;
}

.world-header h1 {
  margin: 0;
  font-size: clamp(3rem, 7vw, 5.4rem);
  font-weight: 400;
  letter-spacing: 0.025em;
  text-shadow: 0 0 35px rgba(120, 165, 230, 0.20);
}

.intro {
  max-width: 560px;
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
}

.title-ornament {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 15px;
  margin-top: 25px;
  color: #b5cdec;
}

.title-ornament span {
  width: 75px;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(169, 200, 239, 0.65)
  );
}

.title-ornament span:last-child {
  transform: rotate(180deg);
}

.title-ornament i {
  font-size: 0.85rem;
  font-style: normal;
}

.world-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  padding-bottom: 40px;
}

.world-card {
  position: relative;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  min-height: 270px;
  padding: 30px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 15px;
  background:
    linear-gradient(
      135deg,
      rgba(36, 54, 82, 0.48),
      rgba(11, 19, 33, 0.76)
    );
  box-shadow: 0 15px 45px rgba(0, 0, 0, 0.14);
  transition:
    transform 250ms ease,
    border-color 250ms ease,
    background 250ms ease,
    box-shadow 250ms ease;
}

.world-card:hover,
.world-card:focus-visible {
  transform: translateY(-5px);
  border-color: rgba(169, 200, 239, 0.55);
  background:
    linear-gradient(
      135deg,
      rgba(47, 71, 109, 0.62),
      rgba(13, 23, 40, 0.86)
    );
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

.card-symbol {
  position: absolute;
  top: 24px;
  right: 28px;
  color: rgba(189, 211, 245, 0.58);
  font-size: 2rem;
}

.card-number {
  color: rgba(164, 192, 232, 0.40);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
}

.card-content {
  position: relative;
  z-index: 1;
  max-width: 370px;
  margin-top: 28px;
}

.card-category {
  margin: 0 0 12px;
  color: #9bb5d9;
  font-size: 0.61rem;
  line-height: 1.6;
}

.card-content h2 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.1rem);
  font-weight: 400;
  line-height: 1.25;
}

.card-content > p:not(.card-category) {
  max-width: 340px;
  margin: 13px 0 24px;
  color: #aab7cb;
  font-family: Arial, sans-serif;
  font-size: 0.88rem;
  line-height: 1.8;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #d3e3fa;
  font-family: Arial, sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.card-link b {
  font-size: 1rem;
  font-weight: 400;
  transition: transform 200ms ease;
}

.world-card:hover .card-link b {
  transform: translate(3px, -3px);
}

.card-decoration {
  position: absolute;
  right: -55px;
  bottom: -90px;
  z-index: -1;
  width: 220px;
  height: 220px;
  border: 1px solid rgba(173, 201, 240, 0.10);
  border-radius: 50%;
}

.card-decoration::before,
.card-decoration::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(173, 201, 240, 0.08);
  border-radius: 50%;
}

.card-decoration::before {
  inset: 18px;
}

.card-decoration::after {
  inset: 40px;
}

.calendar-card {
  --card-accent: #b6c7e8;
}

.climate-card {
  --card-accent: #9bcac9;
}

.atlas-card {
  --card-accent: #b9b0e5;
}

.nations-card {
  --card-accent: #d0bd96;
}

.world-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--card-accent);
  opacity: 0.7;
}

.world-footer {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  margin-top: auto;
  padding: 18px 0;
  border-top: 1px solid rgba(170, 195, 230, 0.12);
  color: #74839b;
  font-family: Arial, sans-serif;
  font-size: 0.61rem;
  letter-spacing: 0.14em;
  line-height: 1.7;
}

@keyframes star-drift {
  from {
    background-position: 0 0;
  }
  to {
    background-position: 420px 360px;
  }
}

@media (min-width: 900px) {
  .world-page {
    padding-top: 35px;
  }

  .world-header {
    padding-bottom: 48px;
  }
}

@media (max-width: 650px) {
  .world-page {
    padding: 20px 18px 0;
  }

  .world-header {
    padding-top: 25px;
    padding-bottom: 30px;
  }

  .back-link {
    position: static;
    display: block;
    text-align: left;
    font-size: 0.76rem;
  }

  .world-header .eyebrow {
    margin-top: 36px;
  }

  .world-header h1 {
    font-size: clamp(2.8rem, 12vw, 4rem);
  }

  .intro {
    max-width: 400px;
    font-size: 0.9rem;
  }

  .world-options {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .world-card {
    min-height: 235px;
    padding: 25px;
  }

  .card-content {
    margin-top: 24px;
  }

  .card-content h2 {
    font-size: 1.8rem;
  }

  .world-footer {
    font-size: 0.52rem;
    letter-spacing: 0.08em;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}