:root {
  --bg: #05060a;
  --bg-alt: #0b0d13;
  --card: #10131b;
  --text: #f4f7ff;
  --muted: rgba(244, 247, 255, 0.75);
  --accent: #7b5cff;
  --accent-2: #2fdab8;
  --accent-3: #ff8e3c;
  --border: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  background: radial-gradient(circle at 20% -10%, rgba(123, 92, 255, 0.18), transparent 40%),
    radial-gradient(circle at 80% 0%, rgba(47, 218, 184, 0.15), transparent 45%),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

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

.hero {
  padding: 2.5rem clamp(1.5rem, 6vw, 6rem) 4rem;
  background: linear-gradient(135deg, rgba(11, 13, 19, 0.95), rgba(5, 6, 10, 0.95));
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
  gap: 1rem;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.logo span {
  color: var(--accent-2);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  font-size: 0.95rem;
}

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

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

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  flex-direction: column;
  gap: 0.35rem;
  cursor: pointer;
}

.nav-toggle span {
  width: 1.5rem;
  height: 2px;
  background: var(--text);
  display: block;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.hero-content {
  max-width: 640px;
}

.eyebrow {
  color: var(--accent-2);
  letter-spacing: 0.3em;
  font-size: 0.78rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  margin-bottom: 1.25rem;
}

.lead {
  font-size: 1.15rem;
  color: var(--muted);
  margin-bottom: 1.75rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  border-radius: 999px;
  padding: 0.85rem 1.75rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  transition: transform 0.2s ease, border 0.2s ease;
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #05060a;
}

.btn.secondary {
  background: var(--bg);
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.btn.ghost {
  border-color: rgba(244, 247, 255, 0.3);
  color: var(--text);
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.hero-highlight {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
  margin-top: 3rem;
}

.hero-highlight div {
  background: rgba(255, 255, 255, 0.03);
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
}

.metric {
  font-size: 2rem;
  font-weight: 600;
  display: block;
  margin-bottom: 0.25rem;
}

main {
  padding: clamp(1.5rem, 6vw, 6rem);
}

.section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}

.section.alt {
  background: var(--bg-alt);
  padding: 4rem clamp(1.5rem, 6vw, 4rem);
  margin: 4rem calc(-1 * clamp(1.5rem, 6vw, 6rem));
}

.section-heading {
  max-width: 680px;
  margin-bottom: 2.5rem;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

.section-heading p {
  color: var(--muted);
}

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

.about-grid article {
  background: rgba(255, 255, 255, 0.02);
  border-radius: 1rem;
  border: 1px solid var(--border);
  padding: 1.5rem;
}

.about-grid h3 {
  margin-bottom: 1rem;
}

.about-grid ul {
  list-style: none;
  color: var(--muted);
}

.about-grid li + li {
  margin-top: 0.65rem;
}

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

.card {
  background: var(--card);
  border-radius: 1.25rem;
  overflow: hidden;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card-top {
  padding: 1.75rem;
}

.card ul {
  list-style: none;
  padding: 0 1.75rem 1.75rem;
  color: var(--muted);
  flex: 1;
}

.card ul li {
  margin-bottom: 0.75rem;
}

.card .btn {
  margin: 0 1.5rem 1.5rem;
}

.gradient-purple {
  background: linear-gradient(135deg, rgba(123, 92, 255, 0.35), rgba(5, 6, 10, 0.95));
}

.gradient-teal {
  background: linear-gradient(135deg, rgba(47, 218, 184, 0.3), rgba(5, 6, 10, 0.95));
}

.gradient-orange {
  background: linear-gradient(135deg, rgba(255, 142, 60, 0.4), rgba(5, 6, 10, 0.95));
}

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

.projects article {
  padding: 1.75rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--muted);
}

.projects .tag {
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.project-year {
  font-weight: 600;
  color: var(--accent-2);
}

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

.video-card {
  padding: 1.75rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: rgba(123, 92, 255, 0.08);
}

.video-card h3 {
  margin-bottom: 0.75rem;
}

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

.contact-form {
  display: grid;
  gap: 1rem;
  max-width: 520px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  font-size: 0.95rem;
  color: var(--muted);
}

.contact-form input,
.contact-form textarea {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  padding: 0.85rem 1rem;
  border-radius: 0.75rem;
  color: var(--text);
  font-size: 1rem;
  margin-top: 0.5rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent-2);
}

.footer {
  padding: 2rem clamp(1.5rem, 6vw, 6rem) 3rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

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

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 4.75rem;
    right: clamp(1.5rem, 6vw, 6rem);
    flex-direction: column;
    background: rgba(5, 6, 10, 0.95);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-toggle.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

@media (max-width: 720px) {
  .nav {
    position: relative;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }

  .section.alt {
    margin: 2rem -1rem;
    padding: 3rem 1rem;
  }

  .footer {
    flex-direction: column;
  }
}