:root {
  --page: #0e1117;
  --surface: #161b24;
  --surface-raised: #1c2330;
  --text: #eef2f8;
  --muted: #8b95a8;
  --accent: #e8943a;
  --accent-alt: #42d4c8;
  --line: color-mix(in srgb, var(--text) 14%, transparent);
  --glow: color-mix(in srgb, var(--accent) 28%, transparent);
  --radius: 12px;
  --radius-lg: 20px;
  --rail-width: clamp(220px, 16vw, 280px);
  --content-max: 1480px;
  --section-space: clamp(4rem, 7vw, 6.5rem);
  --font-display: "Bahnschrift", "Arial Narrow", "Segoe UI", system-ui, sans-serif;
  --font-body: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "Segoe UI Mono", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 0;
  overflow-x: hidden;
  line-height: 1.62;
  font-family: var(--font-body);
  background: var(--page);
  color: var(--text);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    linear-gradient(color-mix(in srgb, var(--accent-alt) 5%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--accent-alt) 5%, transparent) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 90% 70% at 70% 20%, black, transparent 78%);
  opacity: 0.55;
}

body, button, input, select, textarea { font: inherit; }

a { color: inherit; text-decoration: none; }

img, svg, video, canvas, iframe {
  display: block;
  max-width: 100%;
  height: auto;
}

h1, h2, h3, p { margin-top: 0; }

h1, h2, h3 {
  font-family: var(--font-display);
  letter-spacing: -0.03em;
  font-weight: 700;
}

h1 {
  font-size: clamp(2.35rem, 4.8vw, 4.35rem);
  line-height: 1.02;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.85rem, 3.2vw, 3rem);
  line-height: 1.08;
  margin-bottom: 0.85rem;
}

h3 {
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  line-height: 1.22;
}

p { color: var(--muted); }

.page-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--rail-width) minmax(0, 1fr);
  min-height: 100vh;
  max-width: 2160px;
  margin: 0 auto;
}

.site-rail {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--page) 92%, var(--surface));
  backdrop-filter: blur(10px);
}

.rail-inner {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  height: 100%;
  padding: 1.35rem 1.1rem 1.5rem;
  min-width: 0;
}

.rail-brand-row {
  display: flex;
  align-items: center;
  min-width: 0;
}

.brand {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 0.98rem;
  min-width: 0;
}

.brand-logo {
  display: block;
  width: 48px;
  height: 48px;
  max-width: 64px;
  max-height: 64px;
  border-radius: 10px;
  flex: 0 0 auto;
  overflow: hidden;
}

.brand-logo svg { width: 100%; height: 100%; }

.brand small {
  display: block;
  font-size: 0.64rem;
  font-weight: 500;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
}

.rail-nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.rail-nav a {
  display: block;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding: 0.55rem 0.65rem;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.rail-nav a:hover {
  color: var(--text);
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.rail-actions {
  margin-top: auto;
  min-width: 0;
}

.rail-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 1.15rem;
  border-radius: var(--radius);
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.rail-cta {
  width: 100%;
  white-space: normal;
  text-align: center;
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 70%, #ffb86a));
  color: #1a1208;
  border-color: color-mix(in srgb, var(--accent) 60%, transparent);
  box-shadow: 0 8px 24px var(--glow);
}

.button-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px var(--glow);
}

.button-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

.button-secondary:hover {
  border-color: var(--accent-alt);
  color: var(--accent-alt);
}

.page-canvas {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.page-main { flex: 1 1 auto; }

.section-frame {
  width: min(var(--content-max), calc(100% - clamp(1.25rem, 3vw, 3rem)));
  margin: 0 auto;
}

.section {
  padding: var(--section-space) 0;
  position: relative;
}

.section:nth-of-type(even) {
  background: linear-gradient(180deg, color-mix(in srgb, var(--surface) 55%, transparent), transparent 85%);
}

.section-heading {
  max-width: 780px;
  margin-bottom: clamp(1.75rem, 3vw, 2.75rem);
}

.section-heading > p { font-size: 1.04rem; }

.section-kicker,
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 700;
  color: var(--accent-alt);
  margin-bottom: 0.85rem;
}

.lead {
  font-size: clamp(1.02rem, 1.5vw, 1.22rem);
  max-width: 58ch;
}

.hero-spotlight {
  padding-top: clamp(2rem, 4vw, 3.5rem);
  padding-bottom: clamp(3rem, 6vw, var(--section-space));
}

.hero-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: stretch;
}

.hero-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: clamp(0.5rem, 2vw, 1.5rem) 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.75rem 0 1rem;
}

.geo-line {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
}

.hero-visual {
  min-height: clamp(280px, 42vh, 520px);
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--accent-alt) 35%, transparent);
  background:
    radial-gradient(circle at 30% 20%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 42%),
    radial-gradient(circle at 78% 72%, color-mix(in srgb, var(--accent-alt) 14%, transparent), transparent 48%),
    var(--surface-raised);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--text) 6%, transparent);
  overflow: hidden;
}

.tile-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1rem;
}

.tile-grid .card {
  grid-column: span 4;
  min-width: 0;
}

.tile-grid .card:nth-child(1) { grid-column: span 5; }
.tile-grid .card:nth-child(2) { grid-column: span 7; }
.tile-grid .card:nth-child(3) { grid-column: span 4; }
.tile-grid .card:nth-child(4) { grid-column: span 4; }
.tile-grid .card:nth-child(5) { grid-column: span 4; }
.tile-grid .card:nth-child(6) { grid-column: span 12; display: grid; grid-template-columns: auto 1fr; gap: 1rem; align-items: start; }

.card {
  padding: 1.35rem 1.4rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  transform: translateY(-2px);
}

.card p { margin-bottom: 0; }

.card-icon,
.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 0.85rem;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border-radius: 10px;
}

.card-icon svg,
.step-icon svg {
  width: 26px;
  height: 26px;
}

.card-label {
  display: block;
  font-family: var(--font-mono);
  color: var(--accent-alt);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.55rem;
}

.card small {
  display: block;
  color: var(--muted);
  margin-top: 0.55rem;
  font-size: 0.86rem;
}

.icon-draw path { stroke-dasharray: 34 8; animation: iconDraw 12s linear infinite; }
.icon-pulse { transform-box: fill-box; transform-origin: center; animation: iconPulse 12s ease-in-out infinite; }
.icon-slide { animation: iconSlide 12s ease-in-out infinite; }
.icon-spin { transform-box: fill-box; transform-origin: center; animation: iconSpin 14s linear infinite; }

@keyframes iconDraw { to { stroke-dashoffset: -84; } }
@keyframes iconPulse { 50% { transform: scale(0.9); opacity: 0.75; } }
@keyframes iconSlide { 50% { transform: translateX(3px); } }
@keyframes iconSpin { to { transform: rotate(360deg); } }

.process-track {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.85rem;
  counter-reset: step;
}

.process-track li {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.2rem;
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.process-track li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.step-icon { margin-bottom: 0; flex: 0 0 auto; }

.benefit-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.scenario-deck {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1rem;
}

.scenario-deck .card { grid-column: span 2; min-width: 0; }
.scenario-deck .card:nth-child(4) { grid-column: span 3; }
.scenario-deck .card:nth-child(5) { grid-column: span 3; }

.geo-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.geo-chip {
  padding: 1.15rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
}

.geo-chip strong,
.geo-chip span { display: block; }

.geo-chip span {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.45rem;
}

.guide-scroll {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.guide-chapter {
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  min-width: 0;
}

.guide-chapter:nth-child(1),
.guide-chapter:nth-child(10) {
  grid-column: 1 / -1;
}

.guide-chapter li {
  color: var(--muted);
  margin: 0.45rem 0;
}

.faq-stack { max-width: 920px; }

.faq-stack details {
  border-bottom: 1px solid var(--line);
  padding: 1rem 0;
}

.faq-stack summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

.faq-stack summary::-webkit-details-marker { display: none; }

.faq-stack p { padding-right: 1.5rem; }

.contact-split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 0.95rem;
  padding: 1.35rem;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line);
}

.contact-form label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
}

input, select, textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--page);
  color: var(--text);
  padding: 0.82rem 0.9rem;
  border-radius: calc(var(--radius) * 0.65);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.form-message {
  color: var(--accent-alt);
  margin: 0;
}

.site-footer {
  margin-top: auto;
  padding: clamp(3rem, 5vw, 4.5rem) 0;
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 70%, var(--page));
}

.footer-columns {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.9fr;
  gap: 2rem;
}

.footer-brand { font-size: 1.35rem; }

.site-footer a {
  display: block;
  color: var(--muted);
  margin: 0.35rem 0;
}

.site-footer a:hover { color: var(--accent-alt); }

.scene-defs-cache {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

@media (max-width: 1180px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .site-rail {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .rail-inner {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem clamp(1rem, 3vw, 1.5rem);
  }

  .rail-brand-row { flex: 1 1 180px; }

  .rail-nav {
    flex: 1 1 100%;
    flex-direction: row;
    flex-wrap: wrap;
    order: 3;
  }

  .rail-nav a {
    border-left: 0;
    border-bottom: 2px solid transparent;
    border-radius: var(--radius) var(--radius) 0 0;
  }

  .rail-actions {
    margin-top: 0;
    flex: 0 1 auto;
  }

  .rail-cta { width: auto; white-space: nowrap; }

  .hero-stage { grid-template-columns: 1fr; }

  .hero-visual { min-height: 300px; }

  .tile-grid .card,
  .tile-grid .card:nth-child(n) {
    grid-column: span 6;
  }

  .process-track { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .benefit-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .scenario-deck .card,
  .scenario-deck .card:nth-child(n) { grid-column: span 3; }

  .guide-scroll { grid-template-columns: 1fr; }

  .guide-chapter:nth-child(1),
  .guide-chapter:nth-child(10) { grid-column: auto; }

  .contact-split { grid-template-columns: 1fr; }

  .footer-columns { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .rail-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .rail-nav { order: 2; }

  .rail-actions { order: 3; }

  .rail-cta { width: 100%; }

  .tile-grid,
  .scenario-deck {
    grid-template-columns: 1fr;
  }

  .tile-grid .card,
  .tile-grid .card:nth-child(n),
  .scenario-deck .card,
  .scenario-deck .card:nth-child(n) {
    grid-column: auto;
    display: block;
  }

  .process-track,
  .benefit-strip,
  .geo-board,
  .footer-columns {
    grid-template-columns: 1fr;
  }

  h1 { font-size: clamp(2rem, 11vw, 2.75rem); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .card:hover { transform: none; }
  .button-primary:hover { transform: none; }
}