:root {
  --bg-canvas: #18332b;
  --bg-surface: rgba(40, 72, 61, 0.72);
  --bg-surface-hover: rgba(52, 92, 78, 0.88);
  --text-primary: #e0f2e6;
  --text-muted: #a9c7b5;
  --accent-primary: #ff6f59;
  --accent-secondary: #ff9b89;
  --border-subtle: rgba(224, 242, 230, 0.18);
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-elevation: 0 12px 32px -4px rgba(0, 0, 0, 0.38);
  --glow-accent: 0 0 24px -4px rgba(255, 111, 89, 0.45);
  --glass-backdrop: blur(16px) saturate(160%);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; background-color: #122620; color: var(--text-primary); }
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.65;
  margin: 1.25rem;
  border: 1px solid var(--border-subtle);
  min-height: calc(100vh - 2.5rem);
  overflow-wrap: anywhere;
  hyphens: auto;
  background-image: radial-gradient(circle at 12% 18%, rgba(255, 111, 89, 0.11), transparent 36%), radial-gradient(circle at 85% 75%, rgba(40, 72, 61, 0.65), transparent 45%);
}
h1, h2, h3, h4, .brand-logo, .eyebrow-tag, .nav-link, .pill-badge {
  font-family: "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  line-height: 1.2;
}
h1 { font-size: clamp(2rem, 4.5vw, 3.4rem); margin-bottom: 1rem; color: #ffffff; }
h2 { font-size: clamp(1.4rem, 2.8vw, 2.1rem); margin-bottom: 1rem; color: var(--text-primary); }
h3 { font-size: 1.25rem; margin-bottom: 0.65rem; color: #ffffff; }
p { margin-bottom: 1.1rem; max-width: 70ch; }
a { color: var(--accent-secondary); text-decoration: underline; text-underline-offset: 3px; transition: color 0.2s ease; }
a:hover { color: var(--accent-primary); }
img { max-width: 100%; height: auto; display: block; border-radius: 0; object-fit: cover; }
.top-tagline {
  background: #11241e;
  color: var(--text-muted);
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 0.45rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.site-header {
  position: relative;
  background: rgba(24, 51, 43, 0.92);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand-wrap { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; margin-right: auto; }
.brand-mark {
  width: 34px; height: 34px;
  background: var(--accent-primary);
  color: #122620;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 0.95rem;
}
.brand-logo { font-size: 1.25rem; font-weight: 700; color: var(--text-primary); letter-spacing: 0.1em; }
.main-nav { display: flex; align-items: center; gap: 1.35rem; }
.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.35rem 0.2rem;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}
.nav-link:hover, .nav-link[aria-current="page"] { color: var(--accent-primary); border-bottom-color: var(--accent-primary); }
.mobile-dots-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 1.35rem;
  line-height: 1;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
}
.hero-full {
  position: relative;
  min-height: 76vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3.5rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
}
.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(18, 38, 32, 0.76) 0%, rgba(24, 51, 43, 0.92) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
  margin: 0 auto;
  padding: 2.2rem;
  background: rgba(24, 51, 43, 0.65);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-subtle);
}
.hero-content p { margin-left: auto; margin-right: auto; color: var(--text-primary); font-size: 1.12rem; }
.pill-badge {
  display: inline-block;
  background: rgba(255, 111, 89, 0.18);
  color: var(--accent-secondary);
  border: 1px solid rgba(255, 111, 89, 0.45);
  padding: 0.25rem 0.85rem;
  border-radius: 999px;
  font-size: 0.78rem;
  margin-bottom: 0.85rem;
}
.btn-coral {
  display: inline-block;
  background: var(--accent-primary);
  color: #11221c;
  font-family: "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.75rem 1.65rem;
  border-radius: 999px;
  border: none;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s var(--ease-kinetic), box-shadow 0.25s var(--ease-kinetic), background-color 0.2s;
}
.btn-coral:hover {
  background: var(--accent-secondary);
  color: #0d1b16;
  transform: translateY(-3px) scale(1.015);
  box-shadow: var(--shadow-elevation), var(--glow-accent);
}
.btn-secondary {
  display: inline-block;
  background: rgba(224, 242, 230, 0.12);
  color: var(--text-primary);
  font-family: "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: none;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
.btn-secondary:hover { background: rgba(224, 242, 230, 0.24); color: #ffffff; transform: translateY(-2px); }
.container { max-width: 1200px; margin: 0 auto; padding: 3.5rem 1.5rem; }
.section-block { border-bottom: 1px solid var(--border-subtle); }
.lead-learning-block {
  background: var(--bg-surface);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-subtle);
  padding: 2.4rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-elevation);
  transition: transform 0.3s var(--ease-kinetic), box-shadow 0.3s var(--ease-kinetic);
}
.lead-learning-block:hover { transform: translateY(-4px); box-shadow: var(--shadow-elevation), var(--glow-accent); }
.two-col-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}
.glass-panel {
  background: var(--bg-surface);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--border-subtle);
  padding: 1.85rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.3s var(--ease-kinetic), background-color 0.25s, box-shadow 0.3s;
}
.glass-panel:hover {
  background: var(--bg-surface-hover);
  transform: translateY(-5px) scale(1.01);
  box-shadow: var(--shadow-elevation), var(--glow-accent);
}
.coral-field {
  background: linear-gradient(135deg, rgba(40, 72, 61, 0.78) 0%, rgba(255, 111, 89, 0.14) 100%);
}
.img-frame-16x9 { aspect-ratio: 16 / 9; width: 100%; overflow: hidden; margin-bottom: 1.25rem; border: 1px solid var(--border-subtle); }
.img-frame-4x3 { aspect-ratio: 4 / 3; width: 100%; overflow: hidden; margin-bottom: 1.25rem; border: 1px solid var(--border-subtle); }
.img-frame-16x9 img, .img-frame-4x3 img { width: 100%; height: 100%; object-fit: cover; }
.worked-example {
  background: rgba(17, 36, 30, 0.85);
  border-left: 4px solid var(--accent-primary);
  padding: 1.4rem;
  margin: 1.5rem 0;
}
.logic-diagram {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  background: #0f211b;
  color: #e0f2e6;
  padding: 1rem;
  border: 1px solid var(--border-subtle);
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 1rem 0;
}
details.solution-disclosure, details.faq-item {
  background: rgba(18, 38, 32, 0.75);
  border: 1px solid var(--border-subtle);
  margin-bottom: 0.85rem;
  padding: 1rem 1.25rem;
}
details summary {
  cursor: pointer;
  font-family: "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: var(--accent-secondary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; font-size: 1.25rem; color: var(--accent-primary); }
details[open] summary::after { content: "−"; }
details[open] summary { margin-bottom: 0.75rem; border-bottom: 1px solid var(--border-subtle); padding-bottom: 0.5rem; }
.table-wrap { overflow-x: auto; margin: 1.5rem 0; border: 1px solid var(--border-subtle); }
table { width: 100%; border-collapse: collapse; background: rgba(18, 38, 32, 0.6); text-align: left; }
th, td { padding: 0.85rem 1rem; border-bottom: 1px solid var(--border-subtle); }
th { font-family: "Arial Narrow", "Helvetica Neue", sans-serif; text-transform: uppercase; letter-spacing: 0.06em; background: rgba(40, 72, 61, 0.85); color: #ffffff; }
.prose-long { max-width: 70ch; margin: 0 auto; }
.prose-long h2 { margin-top: 2.2rem; }
.prose-long h3 { margin-top: 1.5rem; }
.prose-long ul, .prose-long ol { margin: 0 0 1.25rem 1.5rem; }
.prose-long li { margin-bottom: 0.45rem; }
.form-grid { display: grid; gap: 1.15rem; max-width: 680px; }
.form-group label {
  display: block;
  font-family: "Arial Narrow", "Helvetica Neue", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}
.form-control {
  width: 100%;
  padding: 0.75rem 0.9rem;
  background: rgba(15, 33, 27, 0.9);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
}
.form-control:focus { outline: 2px solid var(--accent-primary); border-color: transparent; }
.composer-output {
  background: #0f211b;
  border: 1px solid var(--border-subtle);
  padding: 1.25rem;
  margin-top: 1.25rem;
  white-space: pre-wrap;
  font-family: ui-monospace, monospace;
  font-size: 0.88rem;
}
.avatar-badge {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: #122620;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-right: 0.75rem;
}
.site-footer {
  background: #11241e;
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 1.5rem 2rem;
  font-size: 0.92rem;
  color: var(--text-muted);
}
.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 0.45rem; }
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}
.reveal-item { opacity: 1; transform: translateY(0); transition: opacity 0.65s var(--ease-kinetic), transform 0.65s var(--ease-kinetic); }
.js-enabled .reveal-item { opacity: 0; transform: translateY(18px); }
.js-enabled .reveal-item.reveal-visible { opacity: 1; transform: translateY(0); }
@media (max-width: 768px) {
  body { margin: 0.5rem; }
  .mobile-dots-btn { display: inline-block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #122620;
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.5rem;
    z-index: 50;
  }
  .main-nav.nav-open { display: flex; }
  .lead-learning-block, .glass-panel { padding: 1.35rem; }
}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}