:root {
  --bg: #020817;
  --panel: rgba(7, 22, 48, 0.72);
  --panel-strong: rgba(8, 35, 76, 0.9);
  --text: #eaf4ff;
  --muted: #9fb7d4;
  --blue: #18a8ff;
  --blue-dark: #0868ff;
  --line: rgba(101, 192, 255, 0.22);
  --glow: 0 0 28px rgba(24, 168, 255, 0.42);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #06345e 0%, var(--bg) 48%, #01040c 100%);
  overflow-x: hidden;
}

#particleCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -3;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at center, black, transparent 72%);
}

.mouse-glow {
  position: fixed;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(24,168,255,0.18), transparent 62%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: -1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px clamp(18px, 4vw, 56px);
  background: rgba(2, 8, 23, 0.72);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand img { width: 190px; filter: drop-shadow(0 0 18px rgba(24,168,255,.55)); }
.site-nav { display: flex; align-items: center; gap: 8px; }
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 999px;
  transition: 0.25s ease;
}
.site-nav a:hover, .site-nav a.active { color: var(--text); background: rgba(24,168,255,0.12); }
.nav-cta { border: 1px solid var(--line); box-shadow: inset 0 0 18px rgba(24,168,255,0.12); }
.nav-toggle { display: none; color: var(--text); background: transparent; border: 1px solid var(--line); border-radius: 10px; padding: 8px 11px; font-size: 1.2rem; }

.section { width: min(1160px, calc(100% - 36px)); margin: 0 auto; padding: 92px 0; }
.page-main { min-height: 72vh; }
.hero { text-align: center; padding-top: 70px; }
.hero-logo-wrap { display: flex; justify-content: center; }
.hero-logo {
  width: min(1050px, 100vw);
  max-width: 100%;
  transform: scale(1.05);
}
.eyebrow { color: #7bd5ff; text-transform: uppercase; letter-spacing: 0.18em; font-weight: 800; font-size: 0.8rem; }
h1 { font-size: clamp(2.5rem, 7vw, 5.8rem); line-height: 0.95; margin: 18px auto; max-width: 960px; letter-spacing: -0.06em; }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.05; margin: 0 0 16px; letter-spacing: -0.04em; }
h3 { margin: 14px 0 8px; }
p { color: var(--muted); line-height: 1.75; }
.hero-copy { max-width: 720px; margin: 0 auto 30px; font-size: 1.13rem; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: 999px; padding: 14px 22px; font-weight: 800; text-decoration: none; cursor: pointer; transition: 0.25s ease; }
.btn.primary { color: white; background: linear-gradient(135deg, var(--blue), var(--blue-dark)); box-shadow: var(--glow); }
.btn.secondary { color: var(--text); background: rgba(255,255,255,0.06); border: 1px solid var(--line); }
.btn:hover { transform: translateY(-3px); }
.section-heading { max-width: 740px; }
.feature-grid, .engine-grid, .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.engine-grid { grid-template-columns: repeat(3, 1fr); }
.glass-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: linear-gradient(145deg, rgba(8,35,76,0.78), rgba(3,13,31,0.65));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 22px 60px rgba(0,0,0,0.28);
  backdrop-filter: blur(16px);
  transition: 0.25s ease;
}
.glass-card:hover { transform: translateY(-6px); border-color: rgba(100,205,255,0.58); box-shadow: var(--glow); }
.icon { font-size: 2.2rem; }
.split-section { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; }
.simulator label, .contact-form label { display: grid; gap: 8px; margin-bottom: 16px; color: var(--text); font-weight: 700; }
select, input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 13px 14px;
  background: rgba(1, 7, 18, 0.68);
  color: var(--text);
  outline: none;
}
textarea { resize: vertical; }
.concept-output, .form-status { margin-top: 18px; color: #bfeaff; }
.stat { text-align: center; }
.stat strong { display: block; font-size: clamp(2rem, 4vw, 3.4rem); color: white; text-shadow: 0 0 20px rgba(24,168,255,0.62); }
.stat span { color: var(--muted); }
.timeline { display: grid; gap: 16px; margin-top: 30px; }
.step { display: grid; grid-template-columns: 70px 180px 1fr; align-items: center; gap: 18px; padding: 22px; border: 1px solid var(--line); border-radius: 22px; background: var(--panel); }
.step span { color: var(--blue); font-weight: 900; font-size: 1.5rem; }
.step h3 { margin: 0; }
.step p { margin: 0; }
ul { color: var(--muted); line-height: 1.8; padding-left: 20px; }
.text-link { color: #7bd5ff; text-decoration: none; font-weight: 800; }
.contact-email { color: #7bd5ff; }
.site-footer { text-align: center; padding: 30px 20px 46px; border-top: 1px solid var(--line); background: rgba(1,5,14,0.5); }
.reveal { opacity: 0; transform: translateY(20px); transition: 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@keyframes floatLogo { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .site-nav { position: absolute; top: 76px; right: 18px; left: 18px; display: none; flex-direction: column; padding: 18px; background: rgba(2,8,23,0.95); border: 1px solid var(--line); border-radius: 22px; }
  .site-nav.open { display: flex; }
  .site-nav a { width: 100%; text-align: center; }
  .feature-grid, .engine-grid, .stats-grid, .split-section { grid-template-columns: 1fr; }
  .step { grid-template-columns: 1fr; }
  .brand img { width: 132px; }
}

/* Responsive polish added for desktop, tablets, and phones */
img, video, canvas, svg { max-width: 100%; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
.site-header { gap: 16px; }
.site-nav { flex-wrap: wrap; justify-content: flex-end; }
.hero-logo {
  width: min(1050px, 100vw);
  max-width: 100%;
  transform: scale(1.05);
}
.glass-card, .btn, select, input, textarea { min-width: 0; }

@media (min-width: 1200px) {
  .section { width: min(1240px, calc(100% - 72px)); }
  .hero-logo {
  width: min(1050px, 100vw);
  max-width: 100%;
  transform: scale(1.05);
}
}

@media (max-width: 1100px) {
  .site-header { padding-inline: 24px; }
  .brand img { width: 160px; }
  .site-nav { gap: 4px; }
  .site-nav a { padding: 9px 11px; font-size: .95rem; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .site-header { align-items: center; }
  .site-nav { box-shadow: 0 20px 70px rgba(0,0,0,.45); }
  .section { width: min(100% - 28px, 760px); padding: 64px 0; }
  .hero { padding-top: 48px; }
  .hero-logo {
  width: min(1050px, 100vw);
  max-width: 100%;
  transform: scale(1.05);
}
  .hero-actions .btn { flex: 1 1 210px; }
  .glass-card { padding: 20px; border-radius: 22px; }
  .mouse-glow { display: none; }
}

@media (max-width: 560px) {
  body::before { background-size: 44px 44px; }
  .site-header { padding: 12px 14px; }
  .brand img { width: 132px; }
  .site-nav { top: 64px; left: 12px; right: 12px; border-radius: 18px; max-height: calc(100vh - 82px); overflow-y: auto; }
  .site-nav a { padding: 13px 12px; font-size: 1rem; }
  .nav-toggle { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }
  .section { width: min(100% - 22px, 520px); padding: 48px 0; }
  .hero { padding-top: 34px; }
  .hero-logo {
  width: min(1050px, 100vw);
  max-width: 100%;
  transform: scale(1.05);
}
  .eyebrow { font-size: .72rem; letter-spacing: .13em; }
  h1 { font-size: clamp(2.1rem, 13vw, 3.6rem); letter-spacing: -0.045em; }
  h2 { font-size: clamp(1.65rem, 9vw, 2.35rem); }
  .hero-copy { font-size: 1rem; }
  .hero-actions { gap: 10px; }
  .btn { width: 100%; padding: 14px 18px; min-height: 48px; }
  .feature-grid, .engine-grid, .stats-grid { gap: 14px; }
  .glass-card { padding: 18px; border-radius: 20px; }
  .step { padding: 18px; gap: 10px; }
  select, input, textarea { font-size: 16px; }
  .site-footer { padding-bottom: 34px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .001ms !important; }
}


/* Added learning guide styles */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 24px;
  align-items: start;
  margin-top: 34px;
}

.article-stack {
  display: grid;
  gap: 22px;
}

.article-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: clamp(22px, 4vw, 36px);
  box-shadow: 0 22px 70px rgba(0,0,0,0.22);
  backdrop-filter: blur(16px);
  margin: 24px 0;
}

.article-panel h2 {
  color: var(--text);
  margin-top: 0;
}

.article-panel h3 {
  color: #dff5ff;
}

.article-panel p,
.article-panel li {
  font-size: 1.02rem;
}

.article-sidebar {
  position: sticky;
  top: 104px;
}

.article-sidebar .glass-card {
  padding: 22px;
}

.article-sidebar a {
  display: block;
  color: var(--muted);
  text-decoration: none;
  padding: 9px 0;
  border-bottom: 1px solid rgba(101,192,255,0.12);
}

.article-sidebar a:hover {
  color: var(--text);
}

.code-block {
  display: block;
  margin: 18px 0;
  padding: 18px;
  overflow-x: auto;
  white-space: pre;
  background: rgba(1, 6, 18, 0.78);
  border: 1px solid rgba(101,192,255,0.22);
  border-radius: 18px;
  color: #dff8ff;
  box-shadow: inset 0 0 26px rgba(24,168,255,0.08);
}

.info-callout {
  margin-top: 18px;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid rgba(123,213,255,0.42);
  background: rgba(24,168,255,0.09);
  color: var(--text);
}

.dev-timeline {
  display: grid;
  gap: 16px;
  margin: 28px 0;
  counter-reset: devstep;
}

.timeline-entry {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 18px;
  align-items: start;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 22px;
  backdrop-filter: blur(16px);
}

.timeline-entry span {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: #fff;
  font-weight: 900;
  box-shadow: var(--glow);
}

.timeline-entry h3 {
  margin-top: 0;
}

.mini-grid,
.system-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.mini-grid > div {
  padding: 18px;
  background: rgba(255,255,255,0.045);
  border: 1px solid rgba(101,192,255,0.14);
  border-radius: 18px;
}

.system-grid {
  margin: 34px 0;
}

.learning-links .glass-card {
  min-height: 260px;
}

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

  .article-sidebar {
    position: static;
    order: -1;
  }
}

@media (max-width: 560px) {
  .timeline-entry {
    grid-template-columns: 1fr;
  }

  .timeline-entry span {
    width: 44px;
    height: 44px;
  }
}



/* Added site expansion styles */
.compact-hero { padding-bottom: 34px; }
.announcement-card { text-align: center; max-width: 920px; margin: 0 auto; }
.announcement-card .btn { margin-top: 12px; }
.feature-grid-three { grid-template-columns: repeat(3, 1fr); }
.responsive-table { overflow-x: auto; padding: 0; }
.comparison-table { width: 100%; border-collapse: collapse; min-width: 820px; }
.comparison-table th, .comparison-table td { padding: 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; color: var(--muted); }
.comparison-table th { color: var(--text); background: rgba(24,168,255,.10); }
.comparison-table td strong { color: var(--text); }
.quiz-shell { display: grid; gap: 22px; }
.quiz-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.quiz-grid label { display: grid; gap: 8px; color: var(--text); font-weight: 800; }
.quiz-result { border: 1px solid var(--line); border-radius: 22px; padding: 20px; background: rgba(1,7,18,.44); }
.quiz-result h2 { margin-top: 0; }
.glossary-grid, .project-grid, .guide-grid, .learning-path-grid { width: min(1160px, calc(100% - 36px)); margin: 0 auto; padding: 30px 0 92px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.project-card { position: relative; overflow: hidden; }
.project-status { display: inline-flex; margin-bottom: 10px; padding: 7px 10px; border-radius: 999px; color: #dff5ff; background: rgba(24,168,255,.16); border: 1px solid var(--line); font-size: .84rem; font-weight: 900; }
.cta-panel { text-align: center; }
.timeline-map { display: grid; gap: 16px; }
@media (max-width: 1100px) { .feature-grid-three, .glossary-grid, .project-grid, .guide-grid, .learning-path-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 700px) { .feature-grid-three, .quiz-grid, .glossary-grid, .project-grid, .guide-grid, .learning-path-grid { grid-template-columns: 1fr; } .glossary-grid, .project-grid, .guide-grid, .learning-path-grid { width: min(100% - 22px, 520px); padding-bottom: 54px; } .comparison-table { min-width: 720px; } }