/* Neural Monitor editorial-split — graphite electric blue, industrial condensed */

:root {
  --gl-bg: #0d1117;
  --gl-bg-alt: #14171c;
  --gl-surface: #1a2129;
  --gl-surface-raised: #222b36;
  --gl-ink: #eef2f8;
  --gl-muted: #8b9aab;
  --gl-accent: #1f6ae0;
  --gl-accent-bright: #008cff;
  --gl-sky: #8ecbff;
  --gl-line: rgba(142, 203, 255, 0.14);
  --gl-glow: rgba(31, 106, 224, 0.35);
  --font-display: "Arial Narrow", "Helvetica Neue Condensed", "Franklin Gothic Medium Condensed", "Segoe UI", system-ui, sans-serif;
  --font-body: "Segoe UI", "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "Segoe UI Mono", monospace;
  --rail-w: clamp(220px, 18vw, 280px);
  --content-max: 1440px;
  --radius-sm: 2px;
  --radius-md: 4px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: clamp(14px, 0.95vw + 12px, 17px);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--gl-bg);
  color: var(--gl-ink);
  font-family: var(--font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--gl-sky);
  text-decoration: none;
}

a:hover {
  color: var(--gl-accent-bright);
}

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

/* Side rail — Neural Monitor HUD chrome */
.side-rail {
  position: sticky;
  top: 0;
  align-self: start;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  min-height: 100vh;
  padding: 1.25rem 1rem 1.5rem;
  border-right: 1px solid var(--gl-line);
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(12px);
}

.rail-brand-row {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.side-rail .brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--gl-ink);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.side-rail .brand small {
  display: block;
  margin-top: 0.15rem;
  color: var(--gl-muted);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.brand-logo {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  max-width: 64px;
  max-height: 64px;
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-sm);
  background:
    linear-gradient(135deg, rgba(31, 106, 224, 0.25), transparent 55%),
    repeating-linear-gradient(90deg, rgba(142, 203, 255, 0.08) 0 1px, transparent 1px 8px),
    var(--gl-surface);
  box-shadow: inset 0 0 0 1px rgba(142, 203, 255, 0.06);
}

.side-rail nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.side-rail nav a {
  padding: 0.45rem 0.5rem;
  border-left: 2px solid transparent;
  color: var(--gl-muted);
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.side-rail nav a:hover {
  border-left-color: var(--gl-accent);
  color: var(--gl-sky);
}

.header-cta,
.rail-cta {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  border: 1px solid rgba(31, 106, 224, 0.55);
  border-radius: var(--radius-sm);
  background: rgba(31, 106, 224, 0.12);
  color: var(--gl-sky);
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: background 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
}

.header-cta:hover,
.rail-cta:hover {
  background: rgba(31, 106, 224, 0.28);
  box-shadow: 0 0 20px var(--gl-glow);
  color: #fff;
}

.content-main {
  min-width: 0;
}

main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2.5rem) 3rem;
}

/* Section rhythm */
.section,
.component-hero {
  padding: clamp(2.5rem, 5vw, 4.5rem) 0;
  border-bottom: 1px solid var(--gl-line);
}

.section-inner {
  width: 100%;
}

.section-heading {
  max-width: 52rem;
  margin-bottom: 2rem;
}

.section-kicker {
  display: inline-block;
  margin-bottom: 0.75rem;
  color: var(--gl-accent-bright);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.section-kicker::before {
  content: "› ";
  color: rgba(142, 203, 255, 0.45);
}

.section-heading h2,
.section-inner > div > h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.4vw + 0.5rem, 2.35rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
  text-transform: uppercase;
}

.section-heading p,
.section-inner > div > p {
  margin: 0;
  color: var(--gl-muted);
  max-width: 42rem;
}

/* Hero editorial-split */
.hero-grid.editorial-split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(1.25rem, 3vw, 2.75rem);
  align-items: center;
}

.hero-copy .eyebrow {
  margin-bottom: 1rem;
  color: var(--gl-sky);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.2vw + 0.4rem, 3rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.12;
  text-transform: uppercase;
}

.hero-copy .lead {
  margin: 0 0 1.5rem;
  color: var(--gl-muted);
  font-size: 1.05rem;
  max-width: 36rem;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.15rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.button-primary {
  border: 1px solid var(--gl-accent);
  background: var(--gl-accent);
  color: #fff;
}

.button-primary:hover {
  background: var(--gl-accent-bright);
  border-color: var(--gl-accent-bright);
  color: #fff;
}

.button-secondary {
  border: 1px solid var(--gl-line);
  background: transparent;
  color: var(--gl-sky);
}

.button-secondary:hover {
  border-color: rgba(142, 203, 255, 0.45);
  background: rgba(142, 203, 255, 0.06);
}

.geo-line {
  color: var(--gl-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-visual {
  position: relative;
  width: 100%;
  max-height: 55vh;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-md);
  background:
    linear-gradient(160deg, rgba(31, 106, 224, 0.08), transparent 45%),
    repeating-linear-gradient(0deg, rgba(142, 203, 255, 0.04) 0 1px, transparent 1px 14px),
    var(--gl-surface);
  box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.35);
}

/* Process */
.process-list {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.process-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-md);
  background: var(--gl-surface);
}

.step-icon {
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-sm);
  background: rgba(31, 106, 224, 0.1);
}

.process-list h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.process-list p {
  margin: 0;
  color: var(--gl-muted);
  font-size: 0.92rem;
}

/* Cards grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 1rem;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.15rem;
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-md);
  background: var(--gl-surface);
}

.card-icon {
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-sm);
  background: rgba(0, 140, 255, 0.08);
}

.card-label {
  color: var(--gl-accent-bright);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.card p {
  margin: 0;
  color: var(--gl-muted);
  font-size: 0.88rem;
  flex: 1;
}

.card small {
  color: rgba(142, 203, 255, 0.55);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* Calculator */
.calculator-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
}

.fact-disclaimer {
  margin-top: 0.75rem !important;
  color: rgba(142, 203, 255, 0.55) !important;
  font-family: var(--font-mono);
  font-size: 0.72rem !important;
}

.calculator-form,
.contact-form {
  display: grid;
  gap: 0.85rem;
  padding: 1.25rem;
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-md);
  background: var(--gl-surface-raised);
}

.calculator-form label,
.contact-form label {
  display: grid;
  gap: 0.35rem;
}

.calculator-form label span,
.contact-form label span {
  color: var(--gl-sky);
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.calculator-form input,
.calculator-form select,
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--gl-line);
  border-radius: var(--radius-sm);
  background: var(--gl-bg-alt);
  color: var(--gl-ink);
  font: inherit;
}

.calculator-form input:focus,
.calculator-form select:focus,
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--gl-accent);
  box-shadow: 0 0 0 2px rgba(31, 106, 224, 0.2);
}

.calculator-form output {
  padding: 0.65rem 0.75rem;
  border: 1px dashed var(--gl-line);
  border-radius: var(--radius-sm);
  color: var(--gl-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.contact-form textarea {
  min-height: 6rem;
  resize: vertical;
}

.form-message {
  margin: 0;
  color: var(--gl-sky);
  font-size: 0.85rem;
}

/* Guide chapters */
.guide-body {
  display: grid;
  gap: 1rem;
}

.chapter {
  padding: 1.25rem;
  border: 1px solid var(--gl-line);
  border-left: 3px solid var(--gl-accent);
  border-radius: var(--radius-md);
  background: var(--gl-surface);
}

.chapter h3 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.chapter p {
  margin: 0 0 0.65rem;
  color: var(--gl-muted);
}

.chapter ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--gl-muted);
}

.chapter li + li {
  margin-top: 0.35rem;
}

/* Geography */
.geo-chips {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 1rem;
}

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

.geo-chip strong {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
}

/* Footer */
.site-footer {
  padding: 2.5rem 0 1rem;
  border-bottom: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: 1.5rem;
}

.footer-brand {
  font-family: var(--font-display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-footer p {
  color: var(--gl-muted);
  font-size: 0.88rem;
}

.site-footer h3 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.site-footer a {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--gl-muted);
  font-size: 0.85rem;
}

.site-footer a:hover {
  color: var(--gl-sky);
}

/* Tablet */
@media (max-width: 1024px) {
  .page-shell {
    grid-template-columns: 1fr;
  }

  .side-rail {
    position: relative;
    min-height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    border-right: none;
    border-bottom: 1px solid var(--gl-line);
  }

  .rail-brand-row {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    flex: 1;
  }

  .side-rail nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
  }

  .side-rail nav a {
    border-left: none;
    border-bottom: 2px solid transparent;
    padding: 0.25rem 0;
  }

  .header-cta,
  .rail-cta {
    margin-top: 0;
  }

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

  .hero-visual {
    max-height: 44vh;
    max-width: 100%;
  }

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

/* Mobile */
@media (max-width: 640px) {
  main {
    padding-inline: 1rem;
  }

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

  .hero-visual {
    max-height: 38vh;
    aspect-ratio: 16 / 11;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .process-list li {
    grid-template-columns: 1fr;
  }
}

/* Wide desktop balance */
@media (min-width: 1440px) {
  .page-shell {
    grid-template-columns: clamp(240px, 16vw, 300px) minmax(0, 1fr);
  }

  main {
    padding-inline: clamp(2rem, 4vw, 3.5rem);
  }

  .hero-grid.editorial-split {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

@media (min-width: 2160px) {
  main {
    max-width: 1680px;
  }
}

@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;
  }
}