:root {
  --bg-canvas: #f3f0fa;
  --bg-surface: #ffffff;
  --bg-surface-hover: #fbf9ff;
  --text-primary: #334155;
  --text-muted: #524c63;
  --accent-primary: #51265a;
  --accent-secondary: #83428f;
  --border-subtle: rgba(81, 38, 90, 0.14);
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-elevation: 0 8px 24px -4px rgba(51, 65, 85, 0.08);
  --shadow-hover: 0 14px 32px -4px rgba(81, 38, 90, 0.16);
  --radius: 4px;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, Consolas, "Courier New", monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.65;
  overflow-wrap: anywhere;
  hyphens: auto;
}
a { color: var(--accent-primary); text-decoration: underline; text-underline-offset: 3px; transition: color 0.2s ease; }
a:hover { color: var(--accent-secondary); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius); object-fit: cover; }

/* Header & Navigation */
.site-header {
  position: relative;
  background-color: var(--bg-surface);
  box-shadow: 0 2px 12px rgba(81, 38, 90, 0.05);
  padding: 1rem 1.5rem;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--accent-primary);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.brand-mark {
  width: 24px;
  height: 24px;
  background-color: var(--accent-primary);
  color: #ffffff;
  display: inline-grid;
  place-items: center;
  border-radius: 2px;
  font-size: 0.75rem;
}
.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2.25rem;
  flex-grow: 1;
}
.nav-group {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}
.nav-group a {
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-primary);
  font-weight: 600;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius);
}
.nav-group a:hover, .nav-group a[aria-current="page"] {
  color: var(--accent-primary);
  background-color: var(--bg-canvas);
}
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  border-radius: 0;
}

/* Layout & Dot Grid */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.dot-grid-bg {
  background-image: radial-gradient( rgba(81, 38, 90, 0.18) 1px, transparent 1px );
  background-size: 18px 18px;
}
.headline-band {
  padding: 2.25rem 0 1.75rem;
  border-bottom: 1px solid var(--border-subtle);
}
.kicker, .mono-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  font-weight: 700;
  display: block;
  margin-bottom: 0.4rem;
}
h1 {
  font-size: clamp(1.75rem, 3.2vw, 2.6rem);
  line-height: 1.18;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
  letter-spacing: -0.02em;
}
h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
  line-height: 1.25;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}
h3 {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1.35;
  margin-bottom: 0.5rem;
  color: var(--accent-primary);
}
.lead-text {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 68ch;
}

/* Buttons */
.btn-plum {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--accent-primary);
  background-color: transparent;
  border: 1.5px solid var(--accent-primary);
  border-radius: 0;
  padding: 0.65rem 1.2rem;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s var(--ease-kinetic);
}
.btn-plum:hover {
  background-color: var(--accent-primary);
  color: #ffffff;
  transform: translateY(-2px);
}
.btn-plum-solid {
  background-color: var(--accent-primary);
  color: #ffffff;
}
.btn-plum-solid:hover {
  background-color: var(--accent-secondary);
  border-color: var(--accent-secondary);
}

/* Bento Grid Architecture */
.bento-section { padding: 2rem 0 3rem; }
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.25rem;
}
.bento-tile {
  background-color: var(--bg-surface);
  border: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow-elevation);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.35s var(--ease-kinetic), box-shadow 0.35s var(--ease-kinetic);
}
.bento-tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  background-color: var(--bg-surface-hover);
}
.span-7 { grid-column: span 7; }
.span-5 { grid-column: span 5; }
.span-4 { grid-column: span 4; }
.span-8 { grid-column: span 8; }
.span-6 { grid-column: span 6; }
.span-12 { grid-column: span 12; }

.tile-media {
  margin: 0.85rem 0;
  overflow: hidden;
  border-radius: var(--radius);
  background-color: #e6e0f0;
}
.tile-media.ratio-16-9 img { aspect-ratio: 16 / 9; width: 100%; }
.tile-media.ratio-4-3 img { aspect-ratio: 4 / 3; width: 100%; }
.tile-media.ratio-1-1 img { aspect-ratio: 1 / 1; width: 100%; }

.tile-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.tile-footer {
  margin-top: 1.2rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

/* CSS Network Schematics & Process Strips */
.network-section {
  padding: 2.75rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.schematic-diagram {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.schematic-node {
  background-color: var(--bg-surface);
  padding: 1.25rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-elevation);
  position: relative;
}
.node-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: var(--bg-canvas);
  color: var(--accent-primary);
  padding: 0.2rem 0.45rem;
  border-radius: 2px;
  display: inline-block;
  margin-bottom: 0.5rem;
  font-weight: 700;
}
.process-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
  padding: 0.75rem;
  background-color: var(--bg-canvas);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.process-step {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-primary);
}
.process-step::after {
  content: "→";
  color: var(--accent-primary);
  font-weight: 700;
}
.process-step:last-child::after { content: ""; }

/* Expandable Trade-Off Notes */
details.tradeoff-note {
  background-color: var(--bg-canvas);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-top: 0.85rem;
}
details.tradeoff-note summary {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
details.tradeoff-note summary::after {
  content: "+";
  font-size: 1rem;
}
details.tradeoff-note[open] summary::after { content: "−"; }
details.tradeoff-note p {
  margin-top: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-primary);
}

/* Long-form Content & Tables */
.prose-wrap {
  max-width: 70ch;
  margin: 0 auto;
}
.prose-wrap p { margin-bottom: 1.15rem; }
.prose-wrap h2 { margin-top: 2rem; }
.prose-wrap h3 { margin-top: 1.5rem; }
.prose-wrap ul, .prose-wrap ol { margin: 0 0 1.25rem 1.25rem; }
.prose-wrap li { margin-bottom: 0.45rem; }

.table-scroll {
  overflow-x: auto;
  margin: 1.5rem 0;
  background: var(--bg-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-elevation);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th, td {
  text-align: left;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
}
th {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--accent-primary);
  background-color: #faf8fc;
}

/* Forms */
.form-group { margin-bottom: 1.1rem; }
.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--accent-primary);
}
.form-control {
  width: 100%;
  padding: 0.65rem 0.8rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  background-color: var(--bg-canvas);
  border: 1px solid rgba(81, 38, 90, 0.3);
  border-radius: var(--radius);
}
.form-control:focus {
  outline: 2px solid var(--accent-primary);
  background-color: var(--bg-surface);
}
.output-box {
  background-color: var(--bg-canvas);
  padding: 1rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  white-space: pre-wrap;
  min-height: 120px;
  margin: 1rem 0;
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s var(--ease-kinetic), transform 0.6s var(--ease-kinetic);
}
.reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 1.5rem 2rem;
  margin-top: 3rem;
  font-size: 0.9rem;
}
.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 0.45rem; }
.footer-bottom {
  max-width: 1200px;
  margin: 2rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .span-7, .span-5, .span-8, .span-4 { grid-column: span 6; }
}
@media (max-width: 768px) {
  .menu-toggle { display: inline-block; }
  .nav-wrapper {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-surface);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-hover);
    gap: 1rem;
    z-index: 50;
  }
  .nav-wrapper.is-open { display: flex; }
  .nav-group { flex-direction: column; align-items: flex-start; gap: 0.65rem; width: 100%; }
  .span-7, .span-5, .span-8, .span-4, .span-6 { grid-column: span 12; }
}
@media (max-width: 480px) {
  .bento-tile { padding: 1.15rem; }
  .header-inner { padding: 0; }
}

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