:root,
[data-theme="dark"] {
  --bg: #040b11;
  --bg-alt: #071320;
  --surface: rgba(9, 22, 34, 0.75);
  --surface-solid: #0b1825;
  --surface-border: rgba(122, 199, 255, 0.15);
  --glow: rgba(94, 234, 212, 0.2);
  --text-primary: #e8f1f7;
  --text-secondary: #a7c0d5;
  --accent: #5eead4;
  --accent-strong: #22d3ee;
  --danger: #f472b6;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Lora', 'Times New Roman', serif;
  --shadow-soft: 0 25px 65px -30px rgba(12, 33, 42, 0.9);
  --shadow-tight: 0 10px 30px -15px rgba(3, 80, 110, 0.5);
  --transition-default: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="light"] {
  --bg: #f5f1e8;
  --bg-alt: #e8dfc8;
  --surface: rgba(255, 252, 245, 0.95);
  --surface-solid: #fffcf5;
  --surface-border: rgba(51, 65, 85, 0.2);
  --glow: rgba(37, 99, 235, 0.1);
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --danger: #dc2626;
  --shadow-soft: 0 25px 65px -30px rgba(0, 0, 0, 0.25);
  --shadow-tight: 0 10px 30px -15px rgba(0, 0, 0, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text-primary);
  font-family: var(--font-sans);
  background: var(--bg);
  display: flex;
  justify-content: center;
}

[data-theme="dark"] body {
  background: radial-gradient(circle at 20% 20%, rgba(34, 211, 238, 0.08), transparent 45%),
              radial-gradient(circle at 80% 0%, rgba(94, 234, 212, 0.1), transparent 57%),
              linear-gradient(160deg, var(--bg) 0%, var(--bg-alt) 100%);
}

[data-theme="light"] body {
  background: linear-gradient(180deg, #f5f1e8 0%, #e8dfc8 100%);
}

[data-theme="dark"] body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(2, 132, 199, 0.12), transparent 60%);
  opacity: 0.5;
  pointer-events: none;
}

.site-root {
  width: 100%;
}

.loading-state {
  max-width: 960px;
  margin: 120px auto;
  padding: 32px;
  text-align: center;
  color: var(--text-secondary);
}

.noscript-message {
  max-width: 720px;
  margin: 40px auto;
  padding: 16px 24px;
  border-radius: 16px;
  background: rgba(9, 22, 34, 0.9);
  border: 1px solid var(--surface-border);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.noscript-message a {
  color: var(--accent-strong);
  text-decoration: none;
}

.page {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 32px clamp(16px, 4vw, 32px) 112px;
  position: relative;
  z-index: 1;
}

.top-nav {
  position: sticky;
  top: 16px;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: 12px 20px;
  margin-bottom: clamp(32px, 6vw, 48px);
  border-radius: 18px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-tight);
}

.nav__brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav__brand span {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.nav__brand strong {
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.nav__links { display: flex; gap: clamp(12px, 3vw, 16px); align-items: center; justify-content: center; }

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px 8px;
  font-size: 1rem;
  transition: color var(--transition-fast);
}

.theme-toggle:hover { color: var(--accent); }

.nav__link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.03em;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.nav__link:hover,
.nav__link:focus {
  color: var(--accent);
  transform: translateY(-2px);
}

.nav__cta {
  border-radius: 999px;
  padding: 8px 18px;
  background: linear-gradient(120deg, rgba(94, 234, 212, 0.25), rgba(45, 212, 191, 0.45));
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav__cta:hover,
.nav__cta:focus {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px -10px rgba(94, 234, 212, 0.6);
}

.hero {
  display: grid;
  gap: clamp(32px, 6vw, 64px);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
  padding: clamp(24px, 5vw, 32px) clamp(24px, 6vw, 48px);
  background: var(--surface);
  border-radius: 28px;
  border: 1px solid var(--surface-border);
  box-shadow: var(--shadow-soft);
}

.hero__eyebrow {
  font-family: var(--font-serif);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.76rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero__title {
  margin: 14px 0 16px;
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  line-height: 1.05;
  color: var(--text-primary);
}

.hero__summary {
  display: grid;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 1.02rem;
  margin-bottom: 18px;
}

.hero__summary a,
.copy-grid a,
.flip-card__body a {
  color: var(--accent-strong);
  text-decoration: none;
  border-bottom: 1px dashed rgba(94, 234, 212, 0.4);
}

.hero__summary a:hover,
.copy-grid a:hover,
.flip-card__body a:hover {
  border-bottom-style: solid;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.hero__meta li {
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(2, 132, 199, 0.14);
  border: 1px solid rgba(94, 234, 212, 0.18);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.hero__actions {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: flex-start;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 12px 22px;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.button:hover,
.button:focus {
  transform: translateY(-2px);
  box-shadow: 0 18px 30px -15px rgba(94, 234, 212, 0.8);
}

.button--ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid rgba(94, 234, 212, 0.4);
}

.button--ghost:hover,
.button--ghost:focus {
  background: rgba(94, 234, 212, 0.12);
  box-shadow: none;
}

.hero__portrait {
  position: relative;
  display: grid;
  place-items: center;
}

.hero__portrait::before {
  content: '';
  position: absolute;
  inset: 10% 5% 5% 5%;
  background: linear-gradient(140deg, rgba(34, 211, 238, 0.18), rgba(56, 189, 248, 0.08));
  filter: blur(50px);
  z-index: 0;
}

.hero__portrait img {
  position: relative;
  z-index: 1;
  width: clamp(260px, 46vw, 380px);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  border: none;
  box-shadow: var(--shadow-soft);
}

.section {
  margin-top: clamp(48px, 10vw, 80px);
}

.section__header {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.section__eyebrow {
  font-family: var(--font-serif);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  font-size: 0.75rem;
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 3vw, 2.4rem);
  margin: 10px 0 4px;
}

.section__lead {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 720px;
}

.copy-grid {
  display: grid;
  gap: 22px;
  color: var(--text-secondary);
  font-size: 1.02rem;
}

.fact-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.fact {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
}

.fact__label {
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.fact__value {
  font-weight: 500;
  color: var(--text-primary);
}

.flip-grid {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.flip-card {
  position: relative;
  min-height: 260px;
  border-radius: 24px;
  perspective: 1200px;
  cursor: pointer;
  outline: none;
}

.flip-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform var(--transition-default);
}

.flip-card.is-flipped .flip-card__inner {
  transform: rotateY(180deg);
}

.flip-card__face {
  position: absolute;
  inset: 0;
  padding: 26px;
  border-radius: 24px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  box-shadow: var(--shadow-tight);
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.flip-card__face--back {
  transform: rotateY(180deg);
  background: var(--surface);
}

.flip-card__eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.flip-card__title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin: 0;
}

.flip-card__body {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.6;
}

.flip-card__hint {
  margin-top: auto;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  text-decoration: none;
  color: var(--accent);
  border: 1px solid rgba(94, 234, 212, 0.35);
  background: rgba(94, 234, 212, 0.12);
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.chip:hover,
.chip:focus {
  transform: translateY(-2px);
  background: rgba(94, 234, 212, 0.18);
}

.timeline {
  display: grid;
  gap: 18px;
}

.timeline__item {
  border-radius: 24px;
  padding: 24px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  box-shadow: var(--shadow-tight);
  display: grid;
  gap: 8px;
}

.timeline__label {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.timeline__title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin: 0;
}

.timeline__subtitle {
  color: var(--text-secondary);
  font-weight: 500;
}

.timeline__body {
  color: var(--text-secondary);
  font-size: 0.97rem;
}

.timeline__meta {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.contact {
  border-radius: 28px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  padding: clamp(28px, 6vw, 42px);
  box-shadow: var(--shadow-soft);
}

.contact__grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  align-items: center;
}

.contact__lead {
  color: var(--text-secondary);
  font-size: 1.02rem;
  margin: 12px 0 0;
}

.social-list {
  display: none;
}

.social-list a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 16px;
  text-decoration: none;
  color: var(--text-primary);
  border: 1px solid rgba(94, 234, 212, 0.25);
  background: rgba(12, 26, 37, 0.8);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.social-list a:hover,
.social-list a:focus {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.social-list i {
  color: var(--accent);
  font-size: 1.1rem;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  color: var(--text-primary);
  text-decoration: none;
  line-height: 1;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.icon-button i {
  font-size: 1.1rem;
  color: var(--accent-strong);
  line-height: 1;
  display: block;
}

.icon-button:hover,
.icon-button:focus {
  transform: translateY(-2px);
  border-color: var(--accent-strong);
}

.resource-list {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  display: grid;
  gap: 6px;
}

.resource-list a {
  color: var(--accent-strong);
  text-decoration: none;
  border-bottom: 1px dashed rgba(94, 234, 212, 0.4);
  font-size: 0.9rem;
}

.resource-list a:hover {
  border-bottom-style: solid;
}

.visited-map {
  height: 360px;
  border-radius: 18px;
  border: 1px solid var(--surface-border);
  box-shadow: var(--shadow-tight);
  overflow: hidden;
}

.footer {
  margin-top: clamp(48px, 10vw, 80px);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.flip-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@media (max-width: 720px) {
  .top-nav {
    flex-direction: column;
    gap: 12px;
  }

  .nav__links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding: 28px;
  }

  .hero__actions {
    width: 100%;
    justify-content: flex-start;
  }

  .button,
  .button--ghost {
    width: fit-content;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}