:root {
  --bg: #04050b;
  --bg-alt: #0b0f1a;
  --bg-soft: #111628;
  --card: #151b2f;
  --accent: #fc6d26;
  --accent-soft: #ffb347;
  --text: #e7ecff;
  --muted: #9aa4c2;
  --accent-gradient: linear-gradient(135deg, #ff6f61, #ffcc33);
  --font-heading: "Space Grotesk", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
}

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

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

.wrapper {
  width: min(1200px, 90vw);
  margin: 0 auto;
}

.wrapper.narrow {
  width: min(840px, 90vw);
}

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

a {
  color: var(--accent-soft);
  text-decoration: none;
  font-weight: 500;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(4, 5, 11, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  z-index: 20;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-image {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  padding: 0;
  object-fit: contain;
}

.logo-text small {
  display: block;
  color: var(--muted);
}

nav {
  display: flex;
  gap: 1.5rem;
}

nav a {
  color: var(--text);
  font-size: 0.95rem;
  opacity: 0.9;
}

.mobile-menu {
  display: none;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text);
  padding: 0.35rem 0.6rem;
  border-radius: 8px;
  font-size: 1.1rem;
  cursor: pointer;
}

.hero {
  background: radial-gradient(circle at 20% 20%, rgba(252, 109, 38, 0.2), transparent 45%),
    radial-gradient(circle at 80% 20%, rgba(124, 92, 255, 0.2), transparent 45%),
    var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.hero-inner {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  padding: 5rem 0 4rem;
}

.hero-text h1 {
  font-size: clamp(2.75rem, 6vw, 3.8rem);
  font-family: var(--font-heading);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--accent-soft);
  margin-bottom: 0.7rem;
}

.lead {
  color: var(--muted);
  font-size: 1.1rem;
}

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

.btn {
  border: none;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.onshape {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn.onshape::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  border-radius: 4px;
  background: url("../images/sponsors/onshape/onshape-favicon.png") center / contain no-repeat;
}

.btn.primary {
  background: var(--accent-gradient);
  color: #0d0f1d;
  box-shadow: 0 15px 35px rgba(255, 111, 97, 0.35);
}

.btn.secondary {
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text);
}

.btn.discord {
  border-color: rgba(88, 101, 242, 0.4);
  color: #bcc3ff;
}

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

.hero-card {
  background: var(--card);
  border-radius: 24px;
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-card h3 {
  margin-top: 0;
  font-family: var(--font-heading);
}

.hero-card ul {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero-card li span {
  display: block;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--accent-soft);
}

.section {
  padding: 5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  background: var(--bg-alt);
}

.section:nth-of-type(even) {
  background: var(--bg-soft);
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 0.5rem;
}

.section-header p {
  max-width: 640px;
  color: var(--muted);
}

.about-grid,
.project-grid,
.sponsor-grid,
.join-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.about-grid article,
.project-grid article,
.sponsor-grid article,
.join-grid article {
  background: var(--card);
  padding: 1.75rem;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.about-grid h3,
.project-grid h3,
.sponsor-grid h3,
.join-grid h3 {
  margin-top: 0;
  font-family: var(--font-heading);
}

.project-tag {
  display: inline-flex;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-soft);
}

.project-grid ul {
  list-style: none;
  padding: 0;
  margin: 1.2rem 0 0;
  color: var(--muted);
}

.project-grid .project-links-inline {
  margin-top: 1.2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.sponsors .section-header h2 {
  max-width: 620px;
}

.sponsor-cta {
  margin-top: 2rem;
  text-align: center;
  font-weight: 500;
}

.sponsor-partners {
  margin-top: 2rem;
  text-align: center;
}

.sponsor-partners p {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

.sponsor-logos {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.sponsor-logo-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 1rem 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  max-width: 260px;
}

.sponsor-logo-card img {
  width: 100%;
  height: auto;
  filter: grayscale(0.1);
}

.project-grid .project-links-inline a {
  font-size: 0.9rem;
  padding: 0.6rem 1.2rem;
}

.join-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.project-page main {
  background: var(--bg);
}

.project-hero {
  padding: 5rem 0 3rem;
  background: radial-gradient(circle at 10% 10%, rgba(252, 109, 38, 0.2), transparent 60%), var(--bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.project-hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.5rem);
  font-family: var(--font-heading);
  margin-bottom: 1rem;
}

.project-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 2.5rem 0 1.5rem;
}

.project-meta article {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 1.25rem;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.project-content {
  background: var(--bg-alt);
}

.project-checklist {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  color: var(--muted);
}

.project-checklist li {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.project-checklist span {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.resource-gallery {
  background: var(--bg-soft);
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.resource-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: rgba(21, 27, 47, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 1rem;
  text-decoration: none;
  color: var(--text);
}

.resource-card img {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.resource-card h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-heading);
}

.project-gallery {
  background: var(--bg);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.gallery-grid figure {
  margin: 0;
  background: rgba(21, 27, 47, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 0.75rem;
}

.gallery-grid figure.actuator-render {
  max-width: 540px;
  margin: 0 auto;
}

.gallery-grid img {
  width: 100%;
  border-radius: 10px;
}

.gallery-grid figcaption {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.project-next {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.project-next article {
  background: rgba(21, 27, 47, 0.8);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 1.25rem;
}

.site-footer {
  padding: 2.5rem 0;
  background: #05060d;
  text-align: center;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.footer-note {
  color: var(--muted);
  margin-top: 1rem;
}

@media (min-width: 720px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

@media (max-width: 640px) {
  .project-meta {
    grid-template-columns: 1fr;
  }

  .project-links,
  .project-grid .project-links-inline {
    flex-direction: column;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  nav {
    width: 100%;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
  }

  nav a {
    font-size: 0.85rem;
  }

  .logo-image {
    width: 48px;
    height: 48px;
  }

  .hero-inner {
    padding-top: 4rem;
  }
}