:root {
  color-scheme: dark;
  --bg: #050816;
  --bg-elevated: rgba(11, 17, 32, 0.82);
  --panel: rgba(15, 23, 42, 0.9);
  --panel-strong: #0f172a;
  --card: #111827;
  --line: rgba(148, 163, 184, 0.18);
  --text: #edf2ff;
  --muted: #9aa6c1;
  --accent: #7dd3fc;
  --accent-strong: #a78bfa;
  --shadow: rgba(15, 23, 42, 0.55);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124, 58, 237, 0.18), transparent 28%),
    radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.14), transparent 24%),
    var(--bg);
  font-family: Inter, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

a {
  color: var(--text);
  text-decoration: none;
}

.page-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 3rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding-top: 1rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 30px rgba(2, 6, 23, 0.25);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #020817;
  font-size: 0.85rem;
  font-weight: 800;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  color: var(--muted);
}

.nav-links a {
  color: var(--muted);
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}

.lang-toggle {
  border: 1px solid var(--line);
  background: rgba(15, 23, 42, 0.7);
  color: var(--text);
  border-radius: 999px;
  padding: 0.55rem 0.8rem;
  font: inherit;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.lang-toggle:hover,
.lang-toggle:focus-visible {
  border-color: rgba(125, 211, 252, 0.7);
  transform: translateY(-1px);
}

.hero {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr;
  gap: 2rem;
  align-items: center;
  padding: 5rem 0 3rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 680px;
  font-size: clamp(3.1rem, 6vw, 5.3rem);
  line-height: 0.96;
  letter-spacing: -0.06em;
}

.intro {
  max-width: 650px;
  margin-top: 1.25rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.85rem 1.3rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

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

.button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  border-color: transparent;
  color: #020817;
}

.button.secondary {
  background: rgba(15, 23, 42, 0.7);
  color: var(--text);
}

.hero-panel {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.9), rgba(11, 17, 32, 0.9));
  box-shadow: 0 20px 50px var(--shadow);
}

.mini-label {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-panel p {
  margin: 0.8rem 0 1.25rem;
  font-size: 1.15rem;
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.mini-grid div {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.7);
}

.mini-grid strong {
  display: block;
  font-size: 1.8rem;
  letter-spacing: -0.06em;
}

.mini-grid span {
  display: block;
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.section-block {
  padding-top: 3.5rem;
}

.section-heading {
  margin-bottom: 1.5rem;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -0.05em;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.project-card {
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.02);
}

.project-topline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.project-card h3 {
  margin: 1rem 0 0.6rem;
  font-size: 1.5rem;
  letter-spacing: -0.04em;
}

.project-card p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.project-card a {
  color: var(--accent);
  font-weight: 600;
}

.about-block {
  padding-bottom: 2rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  padding: 1.5rem 0 0;
}

.about-grid p,
.about-grid li {
  color: var(--muted);
}

.about-grid ul {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.8rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer a {
  color: var(--text);
  font-weight: 600;
}

@media (max-width: 900px) {
  .hero,
  .project-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .topbar,
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links {
    flex-wrap: wrap;
  }
}

@media (max-width: 560px) {
  .page-shell {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .topbar {
    border-radius: 24px;
  }

  .hero {
    padding-top: 3.5rem;
  }

  .cta-row {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }
}