:root {
  --bg: #f7f8fb;
  --bg-soft: #ffffff;
  --fg: #161a22;
  --muted: #5c6675;
  --body: #353d4a;
  --accent: #0bb3b0;
  --accent-2: #4f6cff;
  --border: rgba(20, 30, 50, 0.1);
  --shadow: 0 10px 30px rgba(20, 30, 50, 0.08);
  --reddit: #ff4500;
  --discord: #5865f2;
  --maxw: 760px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "Inter", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

.hero,
.letter,
.foot {
  position: relative;
  z-index: 1;
}

/* Hero */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 6rem 1.5rem 3rem;
  text-align: center;
}

.kicker {
  font-family: "Space Grotesk", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.title {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: clamp(2.2rem, 7vw, 4.2rem);
  letter-spacing: -0.02em;
  line-height: 1.05;
  background: linear-gradient(120deg, var(--fg) 35%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  margin: 1.25rem auto 0;
  max-width: 32rem;
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  color: var(--muted);
}

/* Letter */
.letter {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1rem 1.5rem 2rem;
}

.block {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.block:first-child {
  border-top: none;
}

.block h2 {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: clamp(1.3rem, 3.5vw, 1.8rem);
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
  line-height: 1.25;
  color: var(--fg);
}

.block p {
  color: var(--body);
  font-size: clamp(1rem, 2.4vw, 1.08rem);
}

.block p + p {
  margin-top: 1rem;
}

.block ul.map {
  margin-top: 1rem;
  padding-left: 1.25rem;
  color: var(--body);
  font-size: clamp(1rem, 2.4vw, 1.08rem);
}

.block ul.map li {
  margin-top: 0.55rem;
  padding-left: 0.25rem;
}

.block ul.map li::marker {
  color: var(--accent);
}

.block ul.map + p {
  margin-top: 1.25rem;
}

.block p.map-note {
  margin-top: 1rem;
  font-style: italic;
  color: var(--muted);
}

.block p.build {
  margin-top: 1.5rem;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: clamp(1.5rem, 4.5vw, 2.1rem);
  color: var(--accent);
}

/* Compare images */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 1.75rem;
}

.compare figure {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
}

.compare img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  background: #fff;
}

.compare figcaption {
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}

.compare + p {
  margin-top: 1.75rem;
}

/* Video embed */
.video {
  position: relative;
  margin-top: 1.75rem;
  aspect-ratio: 16 / 9;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: #000;
}

.video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video + p {
  margin-top: 1.75rem;
}

/* CTA */
.cta {
  margin-top: 1rem;
  background: linear-gradient(
    160deg,
    rgba(11, 179, 176, 0.08),
    rgba(79, 108, 255, 0.07)
  );
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: clamp(1.5rem, 5vw, 2.25rem);
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.4rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  color: #fff;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  transform: translateY(-2px);
  opacity: 0.95;
}

.btn-primary {
  background: var(--accent-2);
}

.hero-cta {
  margin-top: 1.75rem;
}

.btn-reddit {
  background: var(--reddit);
}

.btn-discord {
  background: var(--discord);
}

.sign {
  margin-top: 1.75rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.15rem;
  color: var(--fg);
}

/* Footer */
.foot {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

/* Tablet */
@media (max-width: 768px) {
  .hero {
    padding-top: 5rem;
  }
}

/* Mobile */
@media (max-width: 560px) {
  .hero {
    padding: 4rem 1.25rem 2rem;
  }
  .letter {
    padding: 0.5rem 1.25rem 2rem;
  }
  .compare {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .links {
    flex-direction: column;
  }
  .btn {
    width: 100%;
  }
}