:root {
  --accent: #f6542d;
  --ink: #000000;
  --paper: #ffffff;
  --panel: #0a0a0a;
  --muted: #cfd0d2;
  --notice: #ffc501;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  background: var(--ink);
  color: var(--paper);
  font-family: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: -0.025em;
}

.mono {
  font-family: "Space Mono", "Space Grotesk", monospace;
}

.accent {
  color: var(--accent);
}

.site-top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: var(--ink);
  border-bottom: 1px solid #1d1d1d;
}

.brand {
  margin: 0;
  font-size: clamp(1.3rem, 4.5vw, 2.4rem);
  line-height: 1;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.nav-link,
.button {
  text-decoration: none;
  font-weight: 700;
}

.nav-link {
  color: var(--paper);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: 2px solid var(--accent);
  background: var(--accent);
  color: var(--ink);
  padding: 0.55rem 0.85rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.28);
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(rgba(0, 0, 0, 0.86), rgba(0, 0, 0, 0.98)),
    url("https://user-cdn.hackclub-assets.com/019d8427-7d99-743b-9987-1778452b1eb2/DSC05970.jpg")
      center / cover no-repeat;
  padding: 9.5rem 1.2rem 3rem;
}

.hero h1 {
  width: min(92vw, 1120px);
  margin: 0;
  font-size: clamp(2rem, 6.9vw, 5.6rem);
  line-height: 1.08;
}

.sponsor-logos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1rem;
}

.sponsor-logos img {
  width: 100%;
  height: auto;
  max-height: 120px;
  object-fit: contain;
  filter: brightness(0.95);
  transition: filter 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
  .sponsor-logos img:hover {
    filter: brightness(1.1);
  }
}

.join {
  background: var(--accent);
  color: var(--ink);
  padding: 4rem 1rem;
}

.wrap {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
}

.join h2 {
  margin: 0;
  font-size: clamp(1.7rem, 4.2vw, 3rem);
}

.join h1 {
  margin: 0.35rem 0 2rem;
  font-size: clamp(2.3rem, 11vw, 7.8rem);
  line-height: 0.95;
}

.schedule {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1rem;
}

.date-box {
  border: 3px solid var(--ink);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
}

.date-box h3 {
  margin: 0;
  font-size: 2.5rem;
  line-height: 1;
}

.date-box p {
  margin: 0;
  font-size: 6rem;
  line-height: 0.9;
  font-weight: 700;
}

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

.detail {
  border: 3px solid var(--ink);
  background: rgba(255, 255, 255, 0.08);
  min-height: 88px;
  display: flex;
  align-items: center;
  padding: 0.8rem;
  gap: 0.7rem;
}

.detail span {
  font-size: 2rem;
}

.detail strong {
  font-size: 1.4rem;
  line-height: 1.15;
}

.cta {
  margin-top: 1rem;
  width: 100%;
  border: 0;
  background: var(--ink);
  color: var(--accent);
  text-align: center;
  border-radius: 12px;
  font-size: clamp(1.15rem, 2.7vw, 1.9rem);
  font-weight: 700;
  padding: 1rem 1.1rem;
  text-decoration: none;
  display: inline-block;
}

.about {
  background: var(--ink);
  color: var(--paper);
  padding: 5rem 1rem;
}

.about h2 {
  margin: 0;
  font-size: clamp(2rem, 5.2vw, 4rem);
}

.lead {
  margin: 1rem 0 0;
  max-width: 900px;
  font-size: clamp(1.05rem, 2.6vw, 2rem);
  line-height: 1.45;
  color: var(--muted);
}

.features {
  margin-top: 2.4rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.feature {
  border: 2px solid #2a2a2a;
  background: var(--panel);
  border-radius: 8px;
  padding: 1.05rem;
}

.feature h3 {
  margin: 0;
  font-size: clamp(1.25rem, 3vw, 2rem);
}

.feature p {
  margin: 0.6rem 0 0;
  line-height: 1.45;
  color: var(--muted);
}

.feature-badge {
  font-size: 1.8rem;
  line-height: 1;
  margin-bottom: 0.6rem;
  display: inline-block;
}

.photo {
  width: 100%;
  height: 250px;
  border-radius: 8px;
  object-fit: cover;
  display: block;
}

.faq {
  background: #050505;
  padding: 4.5rem 1rem 5rem;
}

.faq h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.75rem);
}

.faq .lead {
  margin-bottom: 2rem;
}

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

.qa {
  border: 2px solid var(--accent);
  background: #0f0f0f;
  border-radius: 8px;
  padding: 1rem;
}

.qa h3 {
  margin: 0;
  font-size: 1.14rem;
}

.qa p {
  margin: 0.55rem 0 0;
  color: var(--muted);
  line-height: 1.4;
}

.date-box,
.detail,
.feature,
.photo,
.qa,
.sponsor-logos a {
  --card-rotate-x: 0deg;
  --card-rotate-y: 0deg;
  --card-lift: 0px;
  --card-scale: 1;
  --card-shadow-alpha: 0;
  --card-glow-x: 50%;
  --card-glow-y: 50%;
  position: relative;
  overflow: hidden;
  transform:
    perspective(850px) translateY(var(--card-lift)) rotateX(var(--card-rotate-x))
    rotateY(var(--card-rotate-y)) scale(var(--card-scale));
  transform-style: preserve-3d;
  transition: transform 0.16s ease, box-shadow 0.2s ease;
  box-shadow: 0 20px 34px rgba(0, 0, 0, var(--card-shadow-alpha));
  will-change: transform, box-shadow;
}

.date-box::after,
.detail::after,
.feature::after,
.photo::after,
.qa::after,
.sponsor-logos a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background:
    radial-gradient(
      170px circle at var(--card-glow-x) var(--card-glow-y),
      rgba(255, 255, 255, 0.1),
      transparent 68%
    );
  opacity: calc(var(--card-shadow-alpha) * 0.65);
  transition: opacity 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
  .date-box:hover,
  .detail:hover,
  .feature:hover,
  .photo:hover,
  .qa:hover,
  .sponsor-logos a:hover {
    --card-lift: -10px;
    --card-scale: 1.015;
    --card-shadow-alpha: 0.42;
  }
}

@media (prefers-reduced-motion: reduce) {
  .date-box,
  .detail,
  .feature,
  .photo,
  .qa,
  .sponsor-logos a {
    transition: none;
  }

  .date-box::after,
  .detail::after,
  .feature::after,
  .photo::after,
  .qa::after,
  .sponsor-logos a::after {
    display: none;
  }

  .date-box:hover,
  .detail:hover,
  .feature:hover,
  .photo:hover,
  .qa:hover,
  .sponsor-logos a:hover {
    transform: none;
    box-shadow: none;
  }
}

.sponsors {
  margin-top: 3rem;
}

.sponsors h2 {
  margin: 0 0 1rem;
}

.mentors {
  margin-top: 3rem;
}

.mentors h2 {
  margin: 0 0 1rem;
}

.sponsor-logos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0 0;
  align-items: center;
}

.sponsor-logos a {
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sponsor-logos img {
  width: 100%;
  height: auto;
  max-height: 120px;
  object-fit: contain;
  filter: brightness(0.95);
  transition: filter 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
  .sponsor-logos img:hover {
    filter: brightness(1.1);
  }
}

.sponsor-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.sponsor {
  border: 2px solid #ffffff;
  border-radius: 999px;
  padding: 0.55rem 1rem;
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.01em;
}

footer {
  background: var(--accent);
  color: var(--ink);
  padding: 1rem 1rem 2rem;
}

.footer-content {
  width: 100%;
  max-width: 1100px;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.footer-section h3,
.footer-section h4 {
  margin: 0;
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  font-weight: 700;
}

.footer-section h3 {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
}

.footer-section p {
  margin: 0;
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  line-height: 1.5;
}

.footer-section a,
.footer-section a:visited {
  color: var(--ink);
  text-decoration: underline;
  font-weight: 600;
}

.footer-section a:hover {
  opacity: 0.8;
}

.small {
  font-size: clamp(0.85rem, 1.8vw, 0.95rem);
  opacity: 0.9;
}

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

.social-links a {
  font-size: 1.5rem;
  text-decoration: none;
  transition: transform 0.2s ease;
}

.social-links a:hover {
  transform: scale(1.2);
}

.footer-bottom {
  display: none;
}

.legal {
  opacity: 0.8;
}

@media (max-width: 760px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-section {
    text-align: center;
  }

  .social-links {
    justify-content: center;
  }
}

@media (max-width: 940px) {
  .schedule {
    grid-template-columns: 1fr;
  }

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

  .date-box p {
    font-size: 4.4rem;
  }

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

@media (max-width: 760px) {
  .nav-actions .nav-link {
    display: none;
  }

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