/* ── ACRON SHARED STYLES ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── THEME VARIABLES ── */
:root, [data-theme="light"] {
  --paper:     #FFFFFF;
  --lattice:   #F4ECFF;
  --bloom:     #DCC9FF;
  --pulse:     #B69AFF;
  --spark:     #6B2BFF;
  --sovereign: #2D1473;
  --deep:      #150A45;
  --glyph:     #0A0612;
  --stone:     #8E84A6;
  --bg:           var(--paper);
  --bg-card:      var(--paper);
  --border-color: var(--glyph);
  --text:         var(--glyph);
  --text-muted:   var(--stone);
  --header-bg:    rgba(255,255,255,0.92);
  --code-bg:      #F8F5FF;
  --code-border:  var(--glyph);
  --code-bar-bg:  var(--lattice);
  --cell-canvas-opacity: 0.28;
}
[data-theme="dark"] {
  --paper:     #0A0612;
  --lattice:   #160D2E;
  --bloom:     #2D1473;
  --pulse:     #3B1D8A;
  --spark:     #B69AFF;
  --sovereign: #DCC9FF;
  --deep:      #F4ECFF;
  --glyph:     #F0EAFF;
  --stone:     #8E84A6;
  --bg:           #0A0612;
  --bg-card:      #100920;
  --border-color: rgba(220,201,255,0.22);
  --text:         #F0EAFF;
  --text-muted:   #8E84A6;
  --header-bg:    rgba(10,6,18,0.92);
  --code-bg:      #100920;
  --code-border:  rgba(220,201,255,0.22);
  --code-bar-bg:  #160D2E;
  --cell-canvas-opacity: 0.32;
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  transition: background 0.3s, color 0.3s;
}

/* ── CA CANVAS ── */
#ca-canvas {
  position: fixed; inset: 0;
  pointer-events: none; z-index: 0;
  opacity: var(--cell-canvas-opacity);
  transition: opacity 0.3s;
}

/* ── HEADER ── */
header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100; height: 56px;
  display: flex; align-items: center;
  padding: 0 2rem;
  background: var(--header-bg);
  border-bottom: 1px solid var(--border-color);
  justify-content: space-between;
  transition: background 0.3s, border-color 0.3s;
}
.logo-wrap {
  display: flex; align-items: center; gap: 0.6rem;
  text-decoration: none;
}
.logo-wordmark {
  font-family: 'Archivo Black', sans-serif;
  font-size: 1.05rem; font-weight: 900;
  letter-spacing: -0.025em; text-transform: uppercase;
  color: var(--glyph);
  text-shadow: 2px 2px 0 var(--bloom), 4px 4px 0 rgba(21,10,69,0.14);
  line-height: 1;
}
header nav { display: flex; gap: 0.25rem; align-items: center; }
header nav a {
  color: var(--text-muted); text-decoration: none;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  padding: 0.4rem 0.8rem; border-radius: 2px;
  transition: color 0.2s, background 0.2s;
}
header nav a:hover { color: var(--glyph); background: var(--lattice); }
header nav a.active { color: var(--spark); }

.theme-toggle {
  display: flex; align-items: center; gap: 0.5rem;
  margin-left: 0.75rem; padding: 0.35rem 0.7rem;
  border-radius: 2px; border: 1.5px solid var(--border-color);
  background: transparent; cursor: pointer;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.theme-toggle:hover { color: var(--glyph); border-color: var(--glyph); background: var(--lattice); }
.toggle-icon { width: 14px; height: 14px; position: relative; flex-shrink: 0; }
.toggle-icon::before, .toggle-icon::after {
  content: ''; position: absolute;
  width: 6px; height: 6px; border-radius: 1px;
  transition: background 0.3s;
}
.toggle-icon::before { top: 0; left: 0; background: var(--spark); }
.toggle-icon::after  { bottom: 0; right: 0; background: var(--bloom); }
[data-theme="dark"] .toggle-icon::before { background: var(--bloom); }
[data-theme="dark"] .toggle-icon::after  { background: var(--spark); }

/* ── LAYOUT ── */
.content-col { position: relative; z-index: 1; background: var(--bg); transition: background 0.3s; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }

/* ── TYPOGRAPHY ── */
.display-lift {
  font-family: 'Archivo Black', sans-serif; font-weight: 900;
  letter-spacing: -0.025em; line-height: 0.9; color: var(--glyph);
  text-shadow: 4px 4px 0 var(--bloom), 8px 8px 0 rgba(21,10,69,0.18);
}
.display-lift--hero {
  font-family: 'Archivo Black', sans-serif; font-weight: 900;
  letter-spacing: -0.025em; line-height: 0.9; color: var(--glyph);
  text-shadow: 6px 6px 0 var(--bloom), 12px 12px 0 rgba(21,10,69,0.18);
}
.section-label {
  font-family: 'Inter', sans-serif; font-size: 11px; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text-muted); margin-bottom: 0.75rem;
}
.section-label::before { content: '▪ '; color: var(--spark); }
.section-title {
  font-family: 'Archivo Black', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 900;
  letter-spacing: -0.025em; line-height: 0.95; margin-bottom: 1rem;
  color: var(--glyph);
  text-shadow: 4px 4px 0 var(--bloom), 8px 8px 0 rgba(21,10,69,0.18);
}
.section-sub { color: var(--text-muted); font-size: 1rem; line-height: 1.6; max-width: 520px; }

/* ── BUTTONS ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 13px 22px; border-radius: 2px;
  background: linear-gradient(180deg, #2D1473 0%, #150A45 100%);
  color: #FFF;
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
  text-decoration: none; border: none; cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.18), 0 2px 0 #DCC9FF;
  transition: box-shadow 0.15s, transform 0.15s, background 0.15s;
}
.btn-primary:hover { background: linear-gradient(180deg, #3A1C8F 0%, #1B0D55 100%); }
.btn-primary:active { transform: translateY(2px); box-shadow: inset 0 1px 0 rgba(255,255,255,0.18); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 12px 21px; border-radius: 2px;
  background: var(--paper); color: var(--glyph);
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
  text-decoration: none; border: 1.5px solid var(--glyph); cursor: pointer;
  box-shadow: 0 2px 0 var(--bloom);
  transition: box-shadow 0.15s, transform 0.15s, background 0.15s, color 0.15s;
}
.btn-secondary:hover { background: var(--glyph); color: var(--paper); }
.btn-secondary:active { transform: translateY(2px); box-shadow: none; }

/* ── BADGE / CHIP ── */
.badge {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 2px;
  border: 1px solid var(--border-color);
  background: var(--paper); color: var(--glyph);
}
.badge--spark::before { content: '▪ '; color: var(--spark); }

/* ── CODE BLOCK ── */
.code-block {
  background: var(--code-bg); border: 1.5px solid var(--code-border);
  border-radius: 2px; overflow: hidden; box-shadow: 4px 4px 0 var(--bloom);
}
.code-block__bar {
  background: var(--code-bar-bg); padding: 0.65rem 1rem;
  display: flex; align-items: center; gap: 0.5rem;
  border-bottom: 1px solid var(--code-border);
}
.cb-dots { display: flex; gap: 4px; }
.cb-dot { width: 8px; height: 8px; border-radius: 1px; }
.cb-label {
  margin-left: auto; font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem; font-weight: 500; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--stone);
}
.code-block pre {
  padding: 1.5rem; font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem; line-height: 1.8; color: var(--glyph); overflow-x: auto;
}
[data-theme="light"] .kw  { color: #2D1473; font-weight: 700; }
[data-theme="light"] .fn  { color: #6B2BFF; }
[data-theme="light"] .str { color: #2D7A3A; }
[data-theme="light"] .cmt { color: var(--stone); font-style: italic; }
[data-theme="light"] .cls { color: #6B2BFF; font-weight: 600; }
[data-theme="light"] .num { color: #B85500; }
[data-theme="dark"]  .kw  { color: #B69AFF; font-weight: 700; }
[data-theme="dark"]  .fn  { color: #DCC9FF; }
[data-theme="dark"]  .str { color: #78D97A; }
[data-theme="dark"]  .cmt { color: var(--stone); font-style: italic; }
[data-theme="dark"]  .cls { color: #F4ECFF; font-weight: 600; }
[data-theme="dark"]  .num { color: #F78C6C; }

/* ── FEATURE GRID ── */
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5px; background: var(--border-color);
  border: 1.5px solid var(--border-color); border-radius: 2px; overflow: hidden;
}
.feature-card {
  background: var(--bg-card); padding: 2.5rem 2rem;
  transition: background 0.2s;
}
.feature-card:hover { background: var(--lattice); }
.feature-card__tag {
  display: inline-flex; align-items: center; gap: 4px;
  margin-bottom: 1.25rem;
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--stone); border: 1px solid var(--border-color);
  border-radius: 2px; padding: 3px 8px; background: var(--paper);
}
.feature-card__tag .dot { color: var(--spark); font-size: 8px; }
.feature-card h3 {
  font-family: 'Archivo Black', sans-serif; font-size: 1rem;
  font-weight: 900; margin-bottom: 0.5rem; letter-spacing: -0.025em;
  color: var(--glyph);
}
.feature-card p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.6; }

/* ── SECTION COMMON ── */
.section { padding: 7rem 0; border-top: 1px solid var(--border-color); }
.section__header { text-align: center; margin-bottom: 4rem; }
.section__header .section-sub { margin: 0 auto; }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border-color);
  position: relative; z-index: 1;
  background: var(--bg); transition: background 0.3s;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2.5rem;
  max-width: 1100px; margin: 0 auto;
  padding: 3.5rem 2rem 2.5rem;
}
@media (max-width: 900px) { .footer-cols { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .footer-cols { grid-template-columns: 1fr; gap: 2rem; } }
.footer-col h4 {
  font-family: 'JetBrains Mono', monospace; font-size: 0.62rem;
  font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--stone); margin-bottom: 1rem;
}
.footer-col a {
  display: block; color: var(--text-muted); text-decoration: none;
  font-size: 0.84rem; line-height: 1; padding: 0.35rem 0;
  transition: color 0.15s;
}
.footer-col a:hover { color: var(--spark); }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
  padding: 1.25rem 2rem;
  max-width: 1100px; margin: 0 auto;
  font-family: 'JetBrains Mono', monospace; font-size: 0.62rem;
  font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--spark); text-decoration: none; }
.footer-bottom a:hover { text-decoration: underline; }
.footer-right { display: flex; align-items: center; gap: 0.5rem; }
.footer-right::before { content: '▪'; color: var(--spark); }

/* ── UTILS ── */
.sr-only { position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0; }
@media (max-width: 768px) { .hide-mobile { display: none; } }

/* ── HAMBURGER MOBILE MENU ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px; height: 36px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  gap: 5px;
  flex-shrink: 0;
}
.nav-hamburger span,
.nav-hamburger::before,
.nav-hamburger::after {
  content: '';
  display: block;
  width: 20px; height: 2px;
  background: var(--glyph);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}
/* Use three child spans rendered via JS */
.nav-hamburger span { display: block; width: 20px; height: 2px; background: var(--glyph); border-radius: 1px; transition: transform 0.2s, opacity 0.2s; }

@media (max-width: 768px) {
  .nav-hamburger { display: flex; }

  header nav {
    display: none;
  }

  header.nav-open nav {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 56px; left: 0; right: 0;
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    z-index: 99;
    padding: 0.5rem 0;
  }

  header nav a {
    display: block;
    padding: 0.75rem 2rem;
    font-size: 0.85rem;
    border-radius: 0;
  }

  header nav .theme-toggle {
    display: flex;
    width: calc(100% - 4rem);
    margin: 0.5rem 2rem;
    justify-content: flex-start;
  }
}