:root {
  --bg: #021509;
  --bg-elevated: #0a2415;
  --bg-elevated-2: #0d2c1b;
  --accent: #00FFBF;
  --accent-dim: rgba(0, 255, 191, 0.12);
  --text: #e8f4ee;
  --text-soft: #c8dcd1;
  --text-muted: #7a9686;
  --border: #1a3a26;
  --max-width: 720px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.15s ease;
}
a:hover { opacity: 0.75; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Header ========== */
header {
  position: sticky;
  top: 0;
  background: rgba(2, 21, 9, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}

.logo img {
  height: 34px;
  width: auto;
  display: block;
}

.social {
  color: var(--text-muted);
  font-size: 13px;
  letter-spacing: 0.3px;
}

/* ========== Meta + title ========== */
.meta {
  font-size: 12px;
  color: var(--text-muted);
  margin: 72px 0 20px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 500;
}

.meta .badge {
  color: var(--accent);
  font-weight: 600;
}

h1 {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 32px;
  color: var(--text);
}

h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 64px 0 12px;
  line-height: 1.25;
  color: var(--text);
}

h3.category {
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 600;
  margin: 72px 0 8px;
}

h3.category-title {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
  line-height: 1.2;
  color: var(--text);
}

p {
  margin-bottom: 22px;
  color: var(--text-soft);
}

p.intro {
  font-size: 19px;
  line-height: 1.6;
  color: var(--text);
  margin-bottom: 32px;
}

strong { color: var(--text); font-weight: 600; }

ul, ol { margin: 0 0 22px 22px; color: var(--text-soft); }
li { margin-bottom: 8px; }

/* ========== Prompt blocks ========== */
.prompt {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 26px;
  margin-bottom: 12px;
  transition: border-color 0.15s ease;
}

.prompt:hover {
  border-color: rgba(0, 255, 191, 0.35);
}

.prompt-number {
  color: var(--accent);
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  display: block;
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

.prompt-body {
  color: var(--text);
  font-size: 16px;
  line-height: 1.55;
}

.prompt-body code,
.bracket {
  color: var(--accent);
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
  font-size: 13.5px;
  background: var(--accent-dim);
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

/* ========== Hub (index) ========== */
.hub-tagline {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}

.hub-intro {
  margin: 72px 0 56px;
}

.hub-intro h1 { margin-bottom: 20px; }
.hub-intro p { color: var(--text-soft); font-size: 19px; max-width: 580px; }

.team {
  display: flex;
  gap: 10px;
  margin-top: 28px;
  align-items: center;
}

.team-photo {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 25%;
  border: 2px solid var(--border);
  display: block;
}

.guide-card {
  display: block;
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.guide-card:hover { opacity: 1; }
.guide-card:hover .guide-title { color: var(--accent); }
.guide-card:hover .arrow { transform: translateX(4px); }

.guide-date {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 14px;
  font-weight: 500;
}

.guide-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  transition: color 0.15s ease;
}

.guide-title .trigger { color: var(--accent); }

.guide-desc {
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.55;
  margin-bottom: 14px;
}

.arrow {
  color: var(--accent);
  font-size: 20px;
  display: inline-block;
  transition: transform 0.2s ease;
}

/* ========== Next step CTA ========== */
.next-step {
  margin: 96px 0 64px;
  padding: 44px 40px;
  background: var(--bg-elevated);
  border: 1px solid rgba(0, 255, 191, 0.35);
  border-radius: 14px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.next-step::before {
  content: '';
  position: absolute;
  inset: -1px;
  background: radial-gradient(circle at top, rgba(0, 255, 191, 0.08), transparent 60%);
  pointer-events: none;
}

.next-step h2 {
  margin: 0 0 12px;
  font-size: 26px;
}

.next-step p {
  max-width: 480px;
  margin: 0 auto 24px;
  color: var(--text-soft);
}

.cta-btn {
  display: inline-block;
  padding: 14px 32px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 8px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-size: 13px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.cta-btn:hover {
  opacity: 1;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 255, 191, 0.25);
}

/* ========== Resources ========== */
.resources {
  margin: 56px 0 24px;
  padding: 28px 0;
  border-top: 1px solid var(--border);
}

.resources h3 {
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 600;
  margin-bottom: 16px;
}

.resources ul { list-style: none; margin: 0; }
.resources li { padding: 6px 0; color: var(--text-soft); }
.resources li a { color: var(--accent); }

/* ========== Footer ========== */
footer {
  margin-top: 80px;
  padding: 32px 24px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

footer a { color: var(--text-soft); }

/* ========== Mobile ========== */
@media (max-width: 640px) {
  body { font-size: 16px; }
  h1 { font-size: 32px; margin-bottom: 24px; }
  h2 { font-size: 22px; margin-top: 48px; }
  h3.category-title { font-size: 24px; }
  .meta { margin-top: 48px; }
  .prompt { padding: 18px 20px; }
  .next-step { padding: 32px 24px; }
  .hub-intro { margin: 48px 0 32px; }
  .hub-intro p { font-size: 17px; }
  .guide-card { padding: 28px 0; }
  .guide-title { font-size: 19px; }
}