:root {
  color-scheme: dark;
  --bg-base: #0f172a;
  --bg-elevated: rgba(15, 23, 42, 0.65);
  --bg-panel: rgba(30, 41, 59, 0.7);
  --bg-hero: linear-gradient(145deg, #0f172a 0%, #1d2a44 35%, #243b53 100%);
  --bg-accent: rgba(14, 165, 233, 0.1);
  --text-primary: #e2e8f0;
  --text-muted: #94a3b8;
  --text-strong: #f8fafc;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --border: rgba(148, 163, 184, 0.2);
  --shadow-soft: 0 20px 45px rgba(15, 23, 42, 0.35);
  --transition: 200ms ease;
  --font-body: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  --font-mono: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

[data-theme="light"] {
  color-scheme: light;
  --bg-base: #f8fafc;
  --bg-elevated: rgba(248, 250, 252, 0.9);
  --bg-panel: rgba(255, 255, 255, 0.8);
  --bg-hero: linear-gradient(145deg, #f8fafc 0%, #e0f2fe 40%, #d6e3ff 100%);
  --bg-accent: rgba(14, 165, 233, 0.1);
  --text-primary: #0f172a;
  --text-muted: #475569;
  --text-strong: #0f172a;
  --accent: #0284c7;
  --accent-strong: #0369a1;
  --border: rgba(148, 163, 184, 0.35);
  --shadow-soft: 0 20px 35px rgba(15, 23, 42, 0.12);
}

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

html,
body {
  min-height: 100%;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.65;
  letter-spacing: 0.01em;
  position: relative;
  overflow-x: hidden;
}

.grain {
  position: fixed;
  inset: 0;
  background-image: radial-gradient(
      circle at 25% 25%,
      rgba(255, 255, 255, 0.025) 0,
      rgba(0, 0, 0, 0) 55%
    ),
    radial-gradient(
      circle at 75% 75%,
      rgba(255, 255, 255, 0.02) 0,
      rgba(0, 0, 0, 0) 60%
    );
  background-blend-mode: screen;
  pointer-events: none;
  z-index: -1;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
  white-space: nowrap;
}

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

a:hover,
a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(56, 189, 248, 0.6);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.35em;
}

main {
  width: min(1120px, 100% - 3rem);
  margin: 0 auto;
  padding: 7rem 0 5rem;
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.site-header {
  position: sticky;
  top: 1.5rem;
  margin: 1.5rem auto 0;
  width: min(1120px, 100% - 3rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  background: var(--bg-elevated);
  backdrop-filter: blur(18px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  gap: 1rem;
  z-index: 10;
  transition: background var(--transition), border-color var(--transition),
    box-shadow var(--transition), transform var(--transition);
}

.site-header--scrolled {
  background: var(--bg-panel);
  border-color: rgba(148, 163, 184, 0.35);
  box-shadow: 0 14px 40px rgba(15, 23, 42, 0.45);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  color: #0f172a;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  font-size: 0.95rem;
}

.site-nav a {
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  transition: background var(--transition), color var(--transition),
    transform var(--transition);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--bg-accent);
  transform: translateY(-1px);
}

.theme-toggle {
  position: relative;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-accent);
  color: var(--accent);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition),
    color var(--transition), border var(--transition);
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(56, 189, 248, 0.6);
}

.toggle-icon::before {
  content: "Dark";
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

[data-theme="light"] .toggle-icon::before {
  content: "Light";
}

.hero {
  position: relative;
  display: grid;
  gap: 2.5rem;
  padding: 3.5rem;
  border-radius: 32px;
  background: var(--bg-hero);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.18);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto auto -160px -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.25), transparent 60%);
  filter: blur(30px);
  opacity: 0.6;
  pointer-events: none;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 560px;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(3rem, 7vw, 4.2rem);
  margin: 0;
  color: var(--text-strong);
  letter-spacing: -0.035em;
}

.hero-summary {
  color: var(--text-muted);
  margin: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-highlights {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  z-index: 1;
}

.hero-highlights article {
  padding: 1.5rem;
  border-radius: 24px;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(148, 163, 184, 0.15);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.08);
}

[data-theme="light"] .hero-highlights article {
  background: rgba(255, 255, 255, 0.7);
}

.hero-highlights h2 {
  margin: 0;
  font-size: 1.4rem;
  color: var(--text-strong);
}

.hero-highlights p {
  margin: 0.5rem 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
}

.lead {
  margin: 0;
  font-size: 1.2rem;
  color: var(--text-strong);
}

.panel {
  position: relative;
  border-radius: 28px;
  background: var(--bg-panel);
  padding: 3rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 2rem;
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.12), transparent 65%);
  opacity: 0.6;
  pointer-events: none;
}

.panel > * {
  position: relative;
  z-index: 1;
}

.panel-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.panel-header h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  color: var(--text-strong);
  letter-spacing: -0.02em;
}

.panel-body {
  display: grid;
  gap: 1rem;
  color: var(--text-primary);
}

.panel p {
  margin: 0;
  color: var(--text-primary);
}

.cards {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  padding: 1.75rem;
  background: rgba(15, 23, 42, 0.55);
  border-radius: 20px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  display: grid;
  gap: 1rem;
  transition: transform var(--transition), border var(--transition),
    box-shadow var(--transition);
}

[data-theme="light"] .card {
  background: rgba(255, 255, 255, 0.45);
}

.card:hover,
.card:focus-within {
  transform: translateY(-6px);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 16px 35px rgba(15, 23, 42, 0.22);
}

.card h3 {
  margin: 0;
  font-size: 1.3rem;
  color: var(--text-strong);
}

.card-meta {
  font-size: 0.8rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.card-link[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.carousel-group {
  display: grid;
  gap: 2.5rem;
}

.carousel {
  display: grid;
  gap: 1.5rem;
}

.carousel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.carousel-heading h3 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--text-strong);
  letter-spacing: 0.04em;
}

.carousel-controls {
  display: inline-flex;
  gap: 0.5rem;
}

.carousel-button {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.35);
  color: var(--text-primary);
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  cursor: pointer;
  transition: transform var(--transition), border var(--transition),
    color var(--transition), background var(--transition);
}

[data-theme="light"] .carousel-button {
  background: rgba(255, 255, 255, 0.65);
}

.carousel-button:hover,
.carousel-button:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.6);
  color: var(--accent);
}

.carousel-button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

.carousel-viewport {
  overflow-x: auto;
  overflow-y: hidden;
  border-radius: 24px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.carousel-viewport::-webkit-scrollbar {
  display: none;
}

.carousel-track {
  display: flex;
  gap: 1.5rem;
  padding: 0.5rem 0.5rem 0.5rem 0.25rem;
  align-items: stretch;
}

.carousel-item {
  min-width: 170px;
  max-width: 190px;
  padding: 1.5rem 1rem;
  border-radius: 20px;
  border: 1px dashed rgba(148, 163, 184, 0.3);
  background: rgba(15, 23, 42, 0.5);
  display: grid;
  gap: 1rem;
  place-items: center;
  text-align: center;
  margin: 0;
}

[data-theme="light"] .carousel-item {
  background: rgba(255, 255, 255, 0.65);
}

.carousel-item img {
  width: 72px;
  height: 72px;
  object-fit: contain;
  filter: drop-shadow(0 6px 16px rgba(15, 23, 42, 0.35));
}

.carousel-item figcaption {
  margin: 0;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.timeline-list {
  list-style: none;
  display: grid;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  position: relative;
}

.timeline-list::before {
  content: "";
  position: absolute;
  inset: 0;
  margin: 0 0 0 0.6rem;
  border-left: 1px dashed rgba(148, 163, 184, 0.35);
}

.timeline-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.5rem;
  padding-left: 0.6rem;
  position: relative;
}

.timeline-list time {
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--accent);
  font-size: 0.95rem;
}

.timeline-list li::before {
  content: "";
  position: absolute;
  left: -0.8rem;
  top: 0.6rem;
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15);
}

.contact-body {
  gap: 1.5rem;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.social-links {
  list-style: none;
  display: flex;
  gap: 1rem;
  padding: 0;
  margin: 1rem 0 0;
  font-weight: 600;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
    border var(--transition), background var(--transition), color var(--transition);
}

.button.primary {
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  color: #0f172a;
  box-shadow: 0 14px 25px rgba(14, 165, 233, 0.25);
}

.button.primary:hover,
.button.primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 18px 32px rgba(14, 165, 233, 0.35);
}

.button.ghost {
  background: transparent;
  border-color: rgba(148, 163, 184, 0.4);
  color: var(--text-primary);
}

.button.ghost:hover,
.button.ghost:focus-visible {
  border-color: rgba(56, 189, 248, 0.6);
  color: var(--accent);
  transform: translateY(-2px);
}

.button.copied {
  background: rgba(56, 189, 248, 0.2);
  border-color: rgba(56, 189, 248, 0.45);
  color: var(--accent);
}

.site-footer {
  width: min(1120px, 100% - 3rem);
  margin: 0 auto 3rem;
  padding: 2rem 1.5rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  box-shadow: var(--shadow-soft);
}

@media (max-width: 900px) {
  .site-header {
    flex-wrap: wrap;
    border-radius: 24px;
    gap: 0.75rem;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    padding: 2.75rem;
  }

  .hero-highlights {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }

  .timeline-list li {
    grid-template-columns: 100px 1fr;
  }
}

@media (max-width: 700px) {
  main {
    width: min(680px, 100% - 2rem);
    padding-top: 6rem;
  }

  .site-header {
    width: min(680px, 100% - 2rem);
    top: 1rem;
  }

  .brand-mark {
    display: none;
  }

  .hero {
    padding: 2.25rem;
  }

  .panel {
    padding: 2.25rem;
  }

  .timeline-list li {
    grid-template-columns: 1fr;
    padding-left: 1.5rem;
  }

  .timeline-list::before {
    margin-left: 0;
  }
}

@media (max-width: 540px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    flex-wrap: wrap;
    gap: 0.6rem;
  }

  .hero {
    padding: 2rem;
  }

  .panel {
    padding: 2rem;
  }

  .cards {
    grid-template-columns: 1fr;
  }
}