:root {
  --bg: #0f1115;
  --surface: #16191f;
  --surface-alt: #1f232c;
  --text: #f5f5f5;
  --text-muted: #b1b6c7;
  --accent: #75f0c2;
  --accent-strong: #50d4a3;
  --border: rgba(255, 255, 255, 0.08);
  --gradient: radial-gradient(circle at top, rgba(117, 240, 194, 0.2), transparent 60%);
  --font-sans: "Space Grotesk", "Inter", "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
}

img {
  max-width: 100%;
  display: block;
  border-radius: 16px;
}

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

a:hover {
  text-decoration: underline;
}

main {
  width: min(1200px, 92vw);
  margin: 0 auto;
  padding-bottom: 6rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem clamp(5vw, 6vw, 8vw);
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-weight: 600;
  letter-spacing: 0.04em;
}

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

.primary-nav {
  display: flex;
  gap: 1.5rem;
}

.primary-nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.button {
  border-radius: 999px;
  padding: 0.65rem 1.3rem;
  border: 1px solid var(--border);
  font-weight: 600;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.button.primary {
  background: var(--accent);
  color: #03261e;
  border-color: transparent;
}

.button.primary:hover {
  background: var(--accent-strong);
}

.button.ghost {
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(260px, 1fr);
  gap: 2.5rem;
  padding: 6rem 0 4rem;
  align-items: start;
}

.hero-content {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: clamp(2rem, 3vw, 3rem);
  border-radius: 32px;
  position: relative;
  overflow: hidden;
}

.hero-content::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient);
  pointer-events: none;
}

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

.hero-card {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  padding: 1.8rem;
  border-radius: 28px;
  box-shadow: 0 10px 45px rgba(0, 0, 0, 0.45);
  position: sticky;
  top: 120px;
}

.hero-card ul {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  color: var(--text-muted);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 0.75rem;
  color: var(--text-muted);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
}

.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 1.5rem 0;
}

.hero-highlights {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  padding: 0;
  margin: 2rem 0;
}

.hero-highlights li {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  padding: 1rem;
  border-radius: 16px;
}

.hero-highlights span {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.social-links {
  display: flex;
  gap: 1.2rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.content-section {
  margin-top: 4rem;
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--border);
  padding: clamp(2rem, 3vw, 3rem);
  border-radius: 32px;
}

.section-header {
  max-width: 720px;
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.pill-group span {
  border: 1px dashed var(--border);
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.timeline {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.timeline-card {
  background: var(--surface);
  border-radius: 24px;
  padding: 1.5rem;
  border: 1px solid var(--border);
}

.timeline-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: rgba(117, 240, 194, 0.12);
  color: var(--accent);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.projects-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.project-card,
.hackathon-card {
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.4rem;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.project-links {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

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

.project-links span {
  color: var(--text-muted);
}

.tag-list {
  margin: 0.5rem 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-list li {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.more-links {
  margin-top: 2rem;
  color: var(--text-muted);
}

.hackathon-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.contact-panel {
  display: grid;
  gap: 1.5rem;
  background: var(--surface-alt);
  border-radius: 32px;
  border: 1px solid var(--border);
  padding: clamp(2rem, 3vw, 3rem);
}

.case-hero {
  margin-top: 4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 32px;
  padding: clamp(2rem, 3vw, 3rem);
  display: grid;
  gap: 2rem;
}

.case-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.case-meta .label {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.3rem;
}

.case-body {
  margin-top: 2rem;
}

.case-section + .case-section {
  margin-top: 1.5rem;
}

.case-list {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
  color: var(--text-muted);
}

.case-media {
  margin: 2.5rem auto;
  text-align: center;
}

.case-media img {
  width: min(560px, 90%);
  margin: 0 auto;
  border-radius: 24px;
}

.case-media figcaption {
  margin-top: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.case-backlink {
  text-align: center;
  margin-top: 2rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
}

.contact-grid .label {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.4rem;
}

.site-footer {
  text-align: center;
  padding: 3rem 1rem;
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .site-header {
    flex-wrap: wrap;
    gap: 1rem;
  }

  .primary-nav {
    flex-wrap: wrap;
    justify-content: center;
  }

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

  .hero-card {
    position: static;
  }

  .case-hero {
    margin-top: 3rem;
  }
}

@media (max-width: 640px) {
  .site-header {
    flex-direction: column;
  }

  .hero-content,
  .content-section {
    border-radius: 24px;
    padding: 1.5rem;
  }

  .hero-highlights {
    grid-template-columns: 1fr;
  }

  .primary-nav {
    gap: 1rem;
  }

  .hero-actions,
  .social-links {
    flex-direction: column;
    align-items: flex-start;
  }
}