:root {
  --page: #0a1018;
  --surface: #121c2e;
  --surface-alt: #1a2840;
  --text: #f2ebe0;
  --muted: #8fa3bc;
  --accent: #d97757;
  --accent-alt: #6e8bff;
  --line: color-mix(in srgb, var(--text) 14%, transparent);
  --radius: 18px;
  --rail-w: 280px;
  --content-max: 1280px;
  --section-space: clamp(4rem, 8vw, 7rem);
  --font-display: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

body {
  margin: 0;
  min-width: 0;
  overflow-x: hidden;
  font-family: var(--font-body);
  line-height: 1.65;
  background: var(--page);
  color: var(--text);
  background-image:
    radial-gradient(circle at 12% 8%, color-mix(in srgb, var(--accent-alt) 16%, transparent), transparent 34%),
    radial-gradient(circle at 88% 2%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 28%),
    linear-gradient(180deg, var(--page), color-mix(in srgb, var(--surface) 40%, var(--page)));
}

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 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.8vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  margin-bottom: 1.25rem;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.2vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 0.85rem;
}

h3 {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.25;
}

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

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

.site-rail {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  z-index: 40;
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--page) 88%, var(--surface));
  backdrop-filter: blur(16px);
}

.rail-inner {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 1.5rem;
  height: 100%;
  padding: 1.35rem 1.1rem 1.5rem;
  min-width: 0;
}

.rail-brand {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  font-weight: 800;
  font-size: 1rem;
  line-height: 1.15;
}

.brand-logo {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  max-width: 64px;
  max-height: 64px;
  flex-shrink: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--accent-alt) 35%, transparent);
  background: color-mix(in srgb, var(--surface) 70%, var(--accent-alt));
}

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

.brand small {
  display: block;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--muted);
}

.site-rail nav {
  display: grid;
  gap: 0.35rem;
  align-content: start;
  min-width: 0;
}

.site-rail nav a {
  display: flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.55rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid transparent;
  border-radius: calc(var(--radius) * 0.65);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.site-rail nav a:hover {
  color: var(--text);
  border-color: var(--line);
  background: color-mix(in srgb, var(--surface-alt) 55%, transparent);
}

.header-cta, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.15rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  font-weight: 800;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.site-rail .header-cta {
  width: 100%;
  margin-top: auto;
}

.header-cta, .button-primary {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 72%, var(--accent-alt)));
  color: var(--page);
  box-shadow: 0 12px 32px color-mix(in srgb, var(--accent) 28%, transparent);
}

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

.header-cta:hover, .button:hover {
  transform: translateY(-1px);
}

.page-canvas {
  min-width: 0;
}

.main-flow {
  display: grid;
  gap: 0;
}

.flow-section {
  position: relative;
}

.flow-section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  pointer-events: none;
}

.flow-hero::before { display: none; }

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

.section-inner {
  width: min(var(--content-max), calc(100% - clamp(1.5rem, 4vw, 3.5rem)));
  margin: 0 auto;
}

.hero {
  padding: clamp(2rem, 5vw, 4rem) 0 var(--section-space);
}

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

.hero-copy { min-width: 0; }

.eyebrow, .section-kicker {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--accent-alt);
}

.lead {
  font-size: clamp(1.05rem, 1.7vw, 1.3rem);
  max-width: 52ch;
  color: color-mix(in srgb, var(--text) 82%, var(--muted));
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.75rem 0 1.25rem;
}

.geo-line {
  font-size: 0.82rem;
  color: var(--muted);
}

.hero-visual {
  overflow: hidden;
  width: 100%;
  min-height: clamp(280px, 38vw, 520px);
  aspect-ratio: 3 / 2;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid color-mix(in srgb, var(--accent-alt) 32%, transparent);
  background: color-mix(in srgb, var(--surface) 88%, var(--accent-alt));
  box-shadow:
    0 24px 64px color-mix(in srgb, var(--page) 55%, transparent),
    inset 0 1px 0 color-mix(in srgb, var(--text) 8%, transparent);
}

.hero-visual svg {
  width: 100%;
  height: 100%;
}

.section-heading {
  max-width: 68ch;
  margin-bottom: clamp(1.75rem, 3vw, 2.75rem);
}

.section-heading > p { font-size: 1.05rem; }

.fact-disclaimer {
  font-size: 0.78rem !important;
  padding: 0.7rem 0.85rem;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border-radius: 0 calc(var(--radius) * 0.5) calc(var(--radius) * 0.5) 0;
}

.flow-services .cards-grid,
.flow-benefits .cards-grid,
.flow-scenarios .cards-grid {
  display: grid;
  gap: 1rem;
}

.flow-services .cards-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.flow-benefits .cards-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.flow-scenarios .cards-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  min-width: 0;
  padding: 1.35rem 1.25rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent-alt) 40%, transparent);
  box-shadow: 0 16px 40px color-mix(in srgb, var(--page) 65%, transparent);
}

.card p { margin-bottom: 0; }

.card-icon, .step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 1rem;
  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: 12px;
}

.card-icon svg, .step-icon svg {
  width: 28px;
  height: 28px;
  overflow: visible;
}

.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); } }

.card-label {
  display: block;
  color: var(--accent-alt);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.65rem;
}

.card small {
  display: block;
  color: var(--muted);
  margin-top: 0.45rem;
}

.flow-process .section-inner {
  display: grid;
  grid-template-columns: minmax(240px, 0.42fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
}

.flow-process .section-heading {
  position: sticky;
  top: 1.5rem;
  margin-bottom: 0;
}

.process-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.process-list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 1rem;
  padding: 1.15rem 1.2rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.geo-chips {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.geo-chip {
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface-alt) 55%, transparent);
}

.geo-chip strong, .geo-chip span { display: block; }
.geo-chip span { color: var(--muted); font-size: 0.88rem; margin-top: 0.35rem; }

.flow-guide .section-inner {
  display: grid;
  grid-template-columns: minmax(220px, 0.34fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 2.75rem);
  align-items: start;
}

.flow-guide .section-heading {
  position: sticky;
  top: 1.5rem;
  margin-bottom: 0;
}

.guide-body {
  display: grid;
  gap: 1rem;
  min-width: 0;
}

.chapter {
  min-width: 0;
  padding: 1.25rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

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

.faq-list { max-width: none; }

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

.faq-list summary {
  cursor: pointer;
  font-weight: 800;
  color: var(--text);
}

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

.contact-grid, .calculator-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.92fr);
  gap: clamp(1.5rem, 3vw, 2.75rem);
  align-items: start;
}

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

.contact-form label, .calculator-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(--surface-alt);
  color: var(--text);
  padding: 0.85rem;
  border-radius: calc(var(--radius) * 0.65);
}

textarea {
  min-height: 110px;
  resize: vertical;
}

output {
  font-size: 1.15rem;
  color: var(--accent);
  font-weight: 800;
}

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

.flow-calculator {
  background: linear-gradient(180deg, color-mix(in srgb, var(--accent-alt) 8%, transparent), transparent 55%);
}

.site-footer {
  padding: 3.5rem 0 4rem;
  background: color-mix(in srgb, var(--surface) 75%, var(--page));
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
}

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

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

.footer-coverage { color: var(--accent-alt); }

@media (min-width: 1440px) {
  :root { --content-max: 1320px; }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(420px, 1fr);
  }
}

@media (min-width: 1800px) {
  :root {
    --rail-w: 300px;
    --content-max: 1400px;
  }

  .page-shell {
    padding: 0 clamp(0rem, 2vw, 2rem);
  }
}

@media (max-width: 1100px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .site-rail {
    position: sticky;
    top: 0;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }

  .rail-inner {
    grid-template-columns: auto 1fr auto;
    grid-template-rows: auto;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem clamp(1rem, 3vw, 1.5rem);
    height: auto;
  }

  .rail-brand {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .brand-logo {
    width: 44px;
    height: 44px;
  }

  .site-rail nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    justify-content: center;
  }

  .site-rail nav a {
    min-height: auto;
    padding: 0.45rem 0.6rem;
    font-size: 0.68rem;
  }

  .site-rail .header-cta {
    width: auto;
    margin-top: 0;
    padding: 0.65rem 0.85rem;
    white-space: nowrap;
  }

  .flow-process .section-inner,
  .flow-guide .section-inner {
    grid-template-columns: 1fr;
  }

  .flow-process .section-heading,
  .flow-guide .section-heading {
    position: static;
    margin-bottom: 1.5rem;
  }

  .flow-services .cards-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow-scenarios .cards-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-grid { grid-template-columns: 1fr; }
  .contact-grid, .calculator-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 3.75rem 0; }

  .section-inner {
    width: min(100% - 1.5rem, var(--content-max));
  }

  .rail-inner {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    justify-items: stretch;
  }

  .site-rail nav {
    justify-content: flex-start;
  }

  .flow-services .cards-grid,
  .flow-benefits .cards-grid,
  .flow-scenarios .cards-grid,
  .geo-chips,
  .footer-grid,
  .process-list li {
    grid-template-columns: 1fr;
  }

  .process-list li {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  h1 { font-size: clamp(2rem, 11vw, 2.8rem); }
  h2 { font-size: clamp(1.55rem, 7vw, 2.2rem); }

  .hero-visual { min-height: 240px; }
  .card { padding: 1.1rem; }
}

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

  .card-icon, .step-icon,
  .card-icon svg, .step-icon svg,
  .card-icon path, .step-icon path {
    animation: none !important;
  }

  .card, .header-cta, .button {
    transition: none !important;
  }
}