/* Variant 1 — side-rail editorial shell, Deep Teal Signal palette */
:root {
  --page: #061953;
  --surface: #0b2d4a;
  --surface-alt: #0b6669;
  --text: #e8f8f5;
  --muted: #7eb8b0;
  --accent: #35a29f;
  --accent-bright: #97feed;
  --accent-ink: #061953;
  --line: color-mix(in srgb, var(--accent-bright) 22%, transparent);
  --radius: 2px;
  --rail-w: clamp(220px, 18vw, 300px);
  --content-max: 1280px;
  --section-space: clamp(64px, 8vw, 108px);
  --font-display: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Segoe UI Mono", "SF Mono", Consolas, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.32s;
}

*, *::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);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
}

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, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-weight: 800;
  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;
  font-weight: 800;
  margin-bottom: 0.85rem;
}

h3 {
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.25;
  font-weight: 700;
}

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

/* App shell — desktop side rail */
.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;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  min-height: 100vh;
  padding: clamp(1.25rem, 2.5vw, 2rem);
  border-right: 1px solid var(--line);
  background: color-mix(in srgb, var(--page) 92%, var(--surface-alt));
  backdrop-filter: blur(12px);
}

.rail-top,
.rail-bottom {
  flex: 0 0 auto;
}

.site-rail nav {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.site-rail nav a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.55rem 0.65rem;
  border-left: 2px solid transparent;
  color: var(--muted);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

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

.brand {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 0.95rem;
  min-width: 0;
}

.brand-logo {
  display: block;
  width: 48px;
  height: 48px;
  max-width: 64px;
  max-height: 64px;
  border-radius: var(--radius);
  object-fit: contain;
  overflow: hidden;
  flex: 0 0 auto;
  border: 1px solid var(--line);
}

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

.brand small {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.header-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.78rem 1.15rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.header-cta {
  width: 100%;
  white-space: nowrap;
}

.header-cta,
.button-primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.button-primary:hover,
.header-cta:hover {
  background: var(--accent-bright);
  border-color: var(--accent-bright);
}

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

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

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

.page-main {
  width: min(var(--content-max), calc(100% - clamp(24px, 4vw, 72px)));
  margin: 0 auto;
}

/* Hero — split with scene slot */
.hero {
  padding: clamp(2.5rem, 6vw, 5rem) 0 var(--section-space);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

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

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

.lead {
  font-size: clamp(1rem, 1.5vw, 1.22rem);
  max-width: 54ch;
  color: color-mix(in srgb, var(--text) 88%, var(--muted));
}

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

.geo-line {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.hero-visual {
  position: relative;
  overflow: hidden;
  width: 100%;
  min-height: clamp(240px, 32vw, 420px);
  aspect-ratio: 4 / 3;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 70% 20%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 45%),
    linear-gradient(145deg, var(--surface), var(--surface-alt));
}

.hero-scene-seed {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
  pointer-events: none;
}

/* Sections */
.section {
  padding: var(--section-space) 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}

.section:nth-of-type(even) {
  background: color-mix(in srgb, var(--surface) 35%, transparent);
  margin-inline: calc(-1 * clamp(12px, 2vw, 36px));
  padding-inline: clamp(12px, 2vw, 36px);
}

.section-inner {
  width: 100%;
  margin: 0 auto;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 2rem;
}

.section-heading > p { font-size: 1.02rem; }

.fact-disclaimer {
  font-size: 0.78rem !important;
  padding: 0.65rem 0.85rem;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  font-family: var(--font-mono);
}

/* Cards — bento mosaic */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 0.85rem;
}

.card {
  min-width: 0;
  padding: 1.35rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  grid-column: span 4;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.card:nth-child(4n+1) { grid-column: span 5; }
.card:nth-child(4n+2) { grid-column: span 3; }
.card:nth-child(4n+3) { grid-column: span 4; }
.card:nth-child(4n) { grid-column: span 5; }

.card:hover {
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  transform: translateY(-3px);
}

.card p { margin-bottom: 0; }

.card-icon,
.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 0.85rem;
  color: var(--accent-bright);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-radius: var(--radius);
}

.card-icon svg,
.step-icon svg {
  width: 26px;
  height: 26px;
  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-bright);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 0.55rem;
}

.card-value {
  display: block;
  margin-top: 0.85rem;
  color: var(--accent);
  font-size: 1.05rem;
  font-weight: 700;
}

.card small {
  display: block;
  color: var(--muted);
  margin-top: 0.35rem;
  font-size: 0.82rem;
}

/* Stats — horizontal strip */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.stat {
  padding: 1.15rem 1rem;
  border-top: 2px solid var(--accent);
  background: var(--surface);
  border-radius: 0 0 var(--radius) var(--radius);
}

.stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.75rem;
  color: var(--accent-bright);
}

.stat span { font-weight: 700; }

.stat p { font-size: 0.82rem; margin: 0.4rem 0 0; }

/* Process — vertical timeline on wide screens */
.process-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
  counter-reset: step;
}

.process-list li {
  min-width: 0;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 0.75rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  position: relative;
}

.process-list li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--accent);
}

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

/* Geography chips — 2x2 panel */
.geo-chips {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.geo-chip {
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 80%, var(--page));
}

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

.geo-chip strong { margin-bottom: 0.35rem; }

.geo-chip span {
  color: var(--muted);
  font-size: 0.88rem;
}

/* Guide — accordion chapters */
.guide-body {
  min-width: 0;
  display: grid;
  gap: 0.65rem;
}

.chapter {
  min-width: 0;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.chapter h3 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.chapter li {
  color: var(--muted);
  margin: 0.4rem 0;
}

.chapter ul {
  margin: 0.75rem 0 0;
  padding-left: 1.15rem;
  columns: 2;
  column-gap: 1.5rem;
}

/* FAQ */
.faq-list {
  max-width: 100%;
  display: grid;
  gap: 0;
}

.faq-list details {
  border-bottom: 1px solid var(--line);
  padding: 0.85rem 0;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
  padding-right: 1.5rem;
}

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

.faq-list p {
  padding-right: 1.5rem;
  margin-top: 0.65rem;
}

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

.contact-form,
.calculator-form {
  display: grid;
  gap: 0.85rem;
  background: var(--surface);
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.contact-form label,
.calculator-form label {
  display: grid;
  gap: 0.3rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

input, select, textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  background: var(--page);
  color: var(--text);
  padding: 0.78rem 0.85rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
}

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

output {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent-bright);
  font-weight: 700;
}

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

/* Footer */
.site-footer {
  padding: var(--section-space) 0 3rem;
  background: color-mix(in srgb, var(--surface-alt) 25%, var(--page));
  border-top: 1px solid var(--line);
  margin-top: 0;
}

.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: 0.3rem 0;
  font-size: 0.88rem;
}

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

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

  .site-rail {
    position: relative;
    min-height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 0.85rem clamp(16px, 3vw, 32px);
    gap: 0.75rem 1rem;
  }

  .rail-top { flex: 0 0 auto; }

  .site-rail nav {
    flex: 1 1 auto;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.25rem;
  }

  .site-rail nav a {
    border-left: none;
    border-bottom: 2px solid transparent;
    padding: 0.45rem 0.55rem;
  }

  .site-rail nav a:hover {
    border-left-color: transparent;
    border-bottom-color: var(--accent);
  }

  .rail-bottom {
    flex: 0 0 auto;
  }

  .header-cta {
    width: auto;
    padding: 0.6rem 0.9rem;
  }

  .brand-logo {
    width: 40px;
    height: 40px;
  }

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

  .hero-visual {
    order: -1;
    max-width: 640px;
    justify-self: center;
  }

  .cards-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card,
  .card:nth-child(n) { grid-column: span 1; }

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

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

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

/* Mobile */
@media (max-width: 640px) {
  .page-main {
    width: min(100% - 28px, var(--content-max));
  }

  .site-rail nav {
    width: 100%;
    justify-content: flex-start;
  }

  .section:nth-of-type(even) {
    margin-inline: -14px;
    padding-inline: 14px;
  }

  .cards-grid,
  .process-list,
  .stats-grid,
  .geo-chips,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .chapter ul { columns: 1; }

  h1 { font-size: clamp(2rem, 11vw, 3.2rem); }
  h2 { font-size: clamp(1.55rem, 8vw, 2.2rem); }

  .hero { padding-top: 1.5rem; }
  .hero-visual { min-height: 220px; }
}

@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,
  .card {
    animation: none !important;
    transition: none !important;
  }
}