/* ═══ rhombic — presentation site ═══
   Palette from the 8-Law Weave:
     Cubic:  #3D3D6B (indaco/indigo)
     FCC:    #B34444 (mattone/brick red)
     Accent: #FF8C42 (arancio/orange)
     Azure:  #4A90E2
*/

:root {
  --cubic: #3D3D6B;
  --fcc: #B34444;
  --accent: #FF8C42;
  --azure: #4A90E2;
  --bg: #0a0a12;
  --bg-section: #0e0e1a;
  --text: #e8e4df;
  --text-dim: #9995a0;
  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans: 'Inter', -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 18px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ═══ LAYOUT ═══ */

.section-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 5rem 0;
}

section:nth-child(even) {
  background: var(--bg-section);
}

h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 2.4rem;
  margin-bottom: 1.5rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--text-dim);
}

p {
  margin-bottom: 1.2rem;
}

a {
  color: var(--fcc);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

a:hover { border-bottom-color: var(--fcc); }

strong { font-weight: 500; color: var(--text); }

code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.85em;
  background: rgba(255,255,255,0.06);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

blockquote {
  border-left: 3px solid var(--fcc);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--text-dim);
}

blockquote cite {
  display: block;
  margin-top: 0.5rem;
  font-style: normal;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* ═══ HERO ═══ */

#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 2rem;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
}

#hero h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 3.5rem;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--fcc) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 1.2rem;
  color: var(--text-dim);
  margin-bottom: 2rem;
}

.stat-inline {
  color: var(--fcc);
  font-weight: 600;
  font-size: 1.3em;
}

.hero-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.6rem;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--fcc);
  color: white;
}

.btn-primary:hover {
  background: #c95555;
  border-bottom-color: transparent;
}

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid rgba(255,255,255,0.15);
}

.btn-ghost:hover {
  border-color: var(--fcc);
  color: var(--text);
}

.hero-canvas {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 1;
  opacity: 0.3;
}

/* ═══ SIDE BY SIDE CARDS ═══ */

.side-by-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.08);
}

.card-cubic {
  background: rgba(61, 61, 107, 0.15);
  border-color: rgba(61, 61, 107, 0.3);
}

.card-fcc {
  background: rgba(179, 68, 68, 0.15);
  border-color: rgba(179, 68, 68, 0.3);
}

.card-label {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.card-cubic .card-label { color: var(--cubic); }
.card-fcc .card-label { color: var(--fcc); }

.card-stat {
  font-family: var(--serif);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.3rem;
}

.card-cubic .card-stat { color: var(--cubic); }
.card-fcc .card-stat { color: var(--fcc); }

.card-desc {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

/* ═══ STATS GRID ═══ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 1rem;
}

.stat-block {
  text-align: center;
  padding: 1.5rem;
}

.stat-value {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 2.8rem;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.fcc-color { color: var(--fcc); }
.cubic-color { color: var(--cubic); }
.accent-color { color: var(--accent); }

.stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.4;
}

.stat-context {
  font-size: 0.75rem;
  opacity: 0.7;
}

/* ═══ AMPLIFICATION CHART ═══ */

.amplification-chart {
  margin-top: 3rem;
  padding: 2rem;
  background: rgba(255,255,255,0.02);
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.06);
}

.amplification-chart h3 {
  text-align: center;
  margin-bottom: 1.5rem;
}

.chart-bars {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.chart-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  align-items: center;
  gap: 1rem;
}

.chart-label {
  font-size: 0.85rem;
  color: var(--text-dim);
  text-align: right;
}

.bar-pair {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.bar {
  height: 24px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 8px;
  font-size: 0.75rem;
  font-weight: 500;
  min-width: 50px;
  transition: width 0.8s ease-out;
}

.bar-ec { background: var(--cubic); color: rgba(255,255,255,0.8); }
.bar-dw { background: var(--fcc); color: white; }

.chart-legend {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.legend-ec::before {
  content: '';
  display: inline-block;
  width: 12px; height: 12px;
  background: var(--cubic);
  border-radius: 2px;
  margin-right: 6px;
  vertical-align: middle;
}

.legend-dw::before {
  content: '';
  display: inline-block;
  width: 12px; height: 12px;
  background: var(--fcc);
  border-radius: 2px;
  margin-right: 6px;
  vertical-align: middle;
}

.legend-base {
  font-style: italic;
  opacity: 0.6;
}

/* ═══ AGENT / TOOLS ═══ */

.agent-demo {
  margin: 2rem 0;
}

.demo-placeholder {
  aspect-ratio: 16/9;
  background: rgba(255,255,255,0.03);
  border: 1px dashed rgba(255,255,255,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.demo-text {
  color: var(--text-dim);
  font-style: italic;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.tool-card {
  padding: 1.2rem;
  background: rgba(255,255,255,0.03);
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.06);
}

.tool-card code {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--fcc);
  font-size: 0.85rem;
}

.tool-card p {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0;
  line-height: 1.4;
}

/* ═══ PAPER ARC ═══ */

.paper-arc {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}

.arc-step {
  text-align: center;
  padding: 1.5rem;
  background: rgba(255,255,255,0.03);
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.06);
  flex: 1;
  min-width: 200px;
}

.arc-num {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1rem;
  color: var(--fcc);
  margin-bottom: 0.5rem;
}

.arc-q {
  font-style: italic;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 0.3rem;
}

.arc-a {
  font-weight: 500;
  font-size: 0.9rem;
}

.arc-arrow {
  font-size: 1.5rem;
  color: var(--text-dim);
  opacity: 0.4;
}

/* ═══ INSTALL ═══ */

.install-block {
  text-align: center;
  margin: 2rem 0;
}

.install-cmd {
  font-size: 1.3rem;
  padding: 1rem 2.5rem;
  background: rgba(179, 68, 68, 0.12);
  border: 1px solid rgba(179, 68, 68, 0.3);
  border-radius: 6px;
  display: inline-block;
  color: var(--fcc);
}

.install-links {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-bottom: 3rem;
}

.install-links a {
  font-size: 0.9rem;
}

.citation {
  margin-top: 2rem;
}

.citation pre {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 6px;
  padding: 1.5rem;
  overflow-x: auto;
  font-size: 0.75rem;
  line-height: 1.5;
}

.citation pre code {
  background: none;
  padding: 0;
  color: var(--text-dim);
}

/* ═══ FOOTER ═══ */

footer {
  padding: 3rem 0;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-brand {
  font-family: var(--serif);
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.footer-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ═══ RESPONSIVE ═══ */

@media (max-width: 768px) {
  html { font-size: 16px; }

  #hero h1 { font-size: 2.2rem; }

  .side-by-side { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .tool-grid { grid-template-columns: 1fr; }

  .chart-row {
    grid-template-columns: 80px 1fr;
  }

  .paper-arc { flex-direction: column; }
  .arc-arrow { transform: rotate(90deg); }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .hero-links { flex-direction: column; align-items: center; }
}