:root {
  --bg: #0a0a0f;
  --bg-soft: #12121a;
  --purple: #7b2fff;
  --purple-soft: rgba(123, 47, 255, 0.18);
  --green: #39ff14;
  --blue: #00e5ff;
  --text: #eaeaf0;
  --muted: #9a9ab2;
  --card: rgba(255,255,255,0.03);
  --border: rgba(123,47,255,0.22);
  --shadow: 0 0 30px rgba(123,47,255,0.18);
  --max-width: 1200px;
  --radius: 16px;
  --space-section: clamp(4rem, 8vw, 7rem);
  --space-inline: clamp(1.25rem, 4vw, 3rem);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top center, rgba(123,47,255,0.08), transparent 40%),
    linear-gradient(180deg, #0a0a0f 0%, #0d0d14 100%);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at center, rgba(123,47,255,0.05), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url('/images/topo-lines.png');
  background-repeat: repeat;
  background-size: 900px auto;
  opacity: 0.06;
  pointer-events: none;
  z-index: 0;
  animation: topoDrift 90s linear infinite;
}

@keyframes topoDrift {
  from { background-position: 0 0; }
  to   { background-position: 220px 140px; }
}

main,
.hero,
.pillars,
.content,
footer {
  position: relative;
  z-index: 1;
}

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

a:hover {
  color: var(--blue);
}

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

/* overlay nav */

#nav-trigger {
  position: fixed;
  top: 1rem;
  right: 1rem;
  width: 48px;
  height: 48px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  cursor: pointer;
  z-index: 1001;
  color: var(--text);
  background: rgba(15, 15, 22, 0.6);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
  box-shadow: 0 0 18px rgba(123,47,255,0.12);
}

#overlay-nav {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10,10,15,0.96), rgba(10,10,15,0.98));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  transform: scale(0.98);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
  z-index: 1000;
}

#overlay-nav.active {
  transform: scale(1);
  opacity: 1;
  pointer-events: auto;
}

#overlay-nav a {
  color: var(--purple);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-family: 'Orbitron', sans-serif;
  text-shadow: 0 0 16px rgba(123,47,255,0.22);
}

/* hero */

.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  text-align: center;
  overflow: hidden;
  padding: 6rem var(--space-inline) 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at center, rgba(123,47,255,0.22), transparent 45%),
    linear-gradient(180deg, rgba(0,0,0,0.15), rgba(0,0,0,0.5));
  opacity: 1;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(100%, 900px);
  margin: 0 auto;
}

.logo {
  width: clamp(140px, 24vw, 220px);
  margin: 0 auto 1.25rem;
  animation: pulse 6s infinite ease-in-out;
}

@keyframes pulse {
  0% {
    filter: drop-shadow(0 0 10px var(--purple));
    transform: scale(1);
  }
  50% {
    filter: drop-shadow(0 0 26px var(--purple));
    transform: scale(1.03);
  }
  100% {
    filter: drop-shadow(0 0 10px var(--purple));
    transform: scale(1);
  }
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: clamp(2.25rem, 7vw, 5rem);
  line-height: 1.05;
  text-shadow: 0 0 20px rgba(123,47,255,0.35);
}

.hero p {
  margin: 0 auto;
  width: min(100%, 720px);
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  letter-spacing: 0.03em;
}

/* shared sections */

.section-shell {
  width: min(100% - (var(--space-inline) * 2), var(--max-width));
  margin: 0 auto;
}

.pillars,
.content {
  padding: var(--space-section) var(--space-inline);
}

.content h2,
.pillars h2,
.content h1 {
  margin-top: 0;
}

/* pillars */

.pillars-grid {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem;
}

.pillar-card,
.post-card {
  padding: 1.4rem 1.3rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015));
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.pillar-card h2,
.post-card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.pillar-card:hover,
.post-card:hover {
  border-color: rgba(0,229,255,0.28);
  box-shadow:
    0 0 24px rgba(123,47,255,0.18),
    0 0 16px rgba(0,229,255,0.08);
}

/* posts */

.posts-wrap {
  width: min(100%, var(--max-width));
  margin: 0 auto;
}

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

.post-card p {
  color: var(--muted);
}

.post-card a {
  font-weight: 600;
}

/* footer */

footer {
  padding: 2.5rem var(--space-inline) 4rem;
  color: var(--muted);
  text-align: center;
}

/* reveal */

.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 1.1s ease, transform 1.1s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* mobile + tablet */

@media (max-width: 980px) {
  .pillars-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .posts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  #nav-trigger {
    top: 0.85rem;
    right: 0.85rem;
    width: 44px;
    height: 44px;
  }

  .hero {
    padding-top: 5.5rem;
    padding-bottom: 3rem;
  }

  .pillars,
  .content {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }

  .pillars-grid,
  .posts {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .pillar-card,
  .post-card {
    padding: 1.15rem 1rem;
  }

  #overlay-nav a {
    font-size: 1.75rem;
  }
}