/* ========================================
   SimSo — AI Workflow Consultancy
   Brand stylesheet
   ======================================== */

:root {
  /* Brand Colors — modern AI consultancy: deep slate + electric accent */
  --color-bg:           #FFFFFF;
  --color-bg-alt:       #F5F7FB;     /* alt section background */
  --color-bg-deep:      #0B1220;     /* hero / dark sections */
  --color-surface:      #FFFFFF;     /* cards */
  --color-text:         #0B1220;     /* near-black body */
  --color-text-soft:    #4B5567;     /* secondary copy */
  --color-text-muted:   #8A93A6;     /* sources, captions */
  --color-text-on-dark: #E8ECF4;
  --color-text-on-dark-soft: #A8B2C7;

  --color-accent:       #2E5BFF;     /* electric blue — primary action */
  --color-accent-hover: #1E47E0;
  --color-accent-soft:  #E8EFFF;
  --color-signal:       #00C896;     /* success / signal */
  --color-warn:         #FFB020;
  --color-danger:       #E5484D;

  --color-border:       #E5E8EE;
  --color-border-strong:#CFD4DD;
  --color-border-on-dark:rgba(255,255,255,0.10);

  /* Typography */
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;

  /* Spacing scale */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;
  --s-10: 128px;

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-pill: 999px;

  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(11,18,32,0.06), 0 1px 1px rgba(11,18,32,0.04);
  --shadow-md: 0 8px 24px rgba(11,18,32,0.08), 0 2px 6px rgba(11,18,32,0.06);
  --shadow-lg: 0 24px 64px rgba(11,18,32,0.14), 0 4px 12px rgba(11,18,32,0.06);

  /* Transition */
  --t-fast: 150ms cubic-bezier(.2,.8,.2,1);
  --t-med:  250ms cubic-bezier(.2,.8,.2,1);

  /* Container */
  --container-max: 1200px;
  --container-narrow: 880px;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  color: var(--color-text);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 var(--s-4);
}
h1 { font-size: clamp(40px, 6vw, 72px); font-weight: 700; letter-spacing: -0.03em; }
h2 { font-size: clamp(28px, 4vw, 44px); font-weight: 700; letter-spacing: -0.025em; }
h3 { font-size: clamp(20px, 2.4vw, 26px); font-weight: 600; }
h4 { font-size: 18px; font-weight: 600; }

p { margin: 0 0 var(--s-4); color: var(--color-text-soft); }
.lead { font-size: clamp(18px, 2vw, 22px); line-height: 1.5; color: var(--color-text-soft); }

a { color: var(--color-accent); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--color-accent-hover); }

ul, ol { color: var(--color-text-soft); padding-left: 1.25em; }
li { margin-bottom: var(--s-2); }

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--s-7) 0;
}

code, pre {
  font-family: var(--font-mono);
  font-size: 13px;
}
code {
  background: var(--color-bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-text);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute; top: -48px; left: 0;
  background: var(--color-accent); color: #fff;
  padding: 10px 16px; z-index: 10001;
  border-radius: 0 0 var(--r-sm) 0;
  transition: top var(--t-fast);
  font-weight: 500;
}
.skip-link:focus { top: 0; color: #fff; }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--s-5);
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--s-5);
}
.section { padding: var(--s-9) 0; }
.section-tight { padding: var(--s-7) 0; }
.section.alt { background: var(--color-bg-alt); }
.section.deep {
  background: var(--color-bg-deep);
  color: var(--color-text-on-dark);
}
.section.deep h1, .section.deep h2, .section.deep h3, .section.deep h4 {
  color: var(--color-text-on-dark);
}
.section.deep p, .section.deep li {
  color: var(--color-text-on-dark-soft);
}
.section.deep .lead { color: var(--color-text-on-dark-soft); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--s-4);
}
.section.deep .eyebrow { color: #6F8DFF; }

.section-header {
  max-width: 760px;
  margin: 0 auto var(--s-7);
  text-align: center;
}
.section-header.left { text-align: left; margin-left: 0; }

/* ---------- Navigation ---------- */
.nav {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-med), background var(--t-med);
}
.nav.scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(255,255,255,0.92);
}
.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--s-4) var(--s-5);
  display: flex; align-items: center; gap: var(--s-6);
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-size: 20px; font-weight: 700; letter-spacing: -0.02em;
  color: var(--color-text);
}
.nav-logo:hover { color: var(--color-text); }
.nav-logo .logo-mark {
  width: 28px; height: 28px;
  background: var(--color-text);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: -0.04em;
  position: relative;
  overflow: hidden;
}
.nav-logo .logo-mark::after {
  content: '';
  position: absolute;
  bottom: 4px; right: 4px;
  width: 6px; height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}
.nav-links {
  list-style: none; margin: 0; padding: 0;
  display: flex; align-items: center; gap: var(--s-5);
  margin-left: auto;
}
.nav-links a {
  color: var(--color-text-soft);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 4px;
  position: relative;
  transition: color var(--t-fast);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--color-text);
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 4px; right: 4px; bottom: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.nav-links a.nav-cta {
  background: var(--color-text);
  color: #fff !important;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  font-weight: 500;
  transition: all var(--t-fast);
}
.nav-links a.nav-cta:hover {
  background: var(--color-accent);
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(46,91,255,0.25);
}
.nav-links a.nav-cta::after { display: none; }
.nav-toggle {
  display: none;
  background: none; border: 0;
  font-size: 22px; cursor: pointer;
  color: var(--color-text);
  margin-left: auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  background: var(--color-text);
  color: #fff;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  padding: 12px 22px;
  border: 1px solid var(--color-text);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: all var(--t-fast);
  text-decoration: none;
}
.btn:hover {
  color: #fff;
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(46,91,255,0.25);
}
.btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}
.btn-ghost:hover {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
  box-shadow: none;
}
.section.deep .btn-ghost {
  color: var(--color-text-on-dark);
  border-color: var(--color-border-on-dark);
}
.section.deep .btn-ghost:hover {
  background: #fff;
  color: var(--color-text);
  border-color: #fff;
}
.btn-arrow::after {
  content: '→';
  display: inline-block;
  transition: transform var(--t-fast);
}
.btn-arrow:hover::after { transform: translateX(3px); }

.btn-row {
  display: flex; flex-wrap: wrap; gap: var(--s-3);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: var(--color-bg);
  padding: var(--s-10) 0 var(--s-9);
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(46,91,255,0.12), transparent 70%),
    radial-gradient(ellipse 60% 40% at 100% 30%, rgba(0,200,150,0.08), transparent 70%);
  z-index: 0;
}
.hero-grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(11,18,32,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11,18,32,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 20%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}
.hero-inner h1 {
  margin-bottom: var(--s-5);
  background: linear-gradient(180deg, var(--color-text) 30%, #4B5567 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-inner .lead {
  margin-bottom: var(--s-6);
  max-width: 680px;
  margin-left: auto; margin-right: auto;
}

/* Hero pill */
.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  border-radius: var(--r-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-soft);
  margin-bottom: var(--s-5);
}
.hero-pill .dot {
  width: 6px; height: 6px;
  background: var(--color-signal);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(0,200,150,0.18);
}

/* Hero CTAs */
.hero-cta {
  display: flex; gap: var(--s-3);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--s-6);
}

/* ---------- Cards & Grids ---------- */
.grid { display: grid; gap: var(--s-5); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--r-lg);
  padding: var(--s-6);
  transition: all var(--t-med);
}
.card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.card h3 {
  font-size: 20px;
  margin-bottom: var(--s-3);
}
.card p { color: var(--color-text-soft); margin-bottom: 0; }
.card .card-icon {
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--s-4);
}
.card.dark {
  background: var(--color-bg-deep);
  color: var(--color-text-on-dark);
  border-color: var(--color-border-on-dark);
}
.card.dark h3 { color: #fff; }
.card.dark p { color: var(--color-text-on-dark-soft); }

/* Numbered card */
.card-numbered {
  position: relative;
  padding-top: var(--s-7);
}
.card-numbered .num {
  position: absolute;
  top: var(--s-6);
  right: var(--s-6);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}
.card-numbered .step-num {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--s-3);
  letter-spacing: -0.03em;
}

/* ---------- Stat / metric ---------- */
.metric-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--s-5);
  margin-top: var(--s-6);
}
.metric {
  border-left: 3px solid var(--color-accent);
  padding: var(--s-3) 0 var(--s-3) var(--s-4);
}
.metric .v {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: var(--s-2);
}
.metric .l {
  font-size: 13px;
  color: var(--color-text-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}
.section.deep .metric .v { color: #fff; }
.section.deep .metric .l { color: var(--color-text-on-dark-soft); }

/* ---------- Feature row ---------- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-8);
  align-items: center;
}
.feature-row.reverse > *:first-child { order: 2; }
@media (max-width: 860px) {
  .feature-row { grid-template-columns: 1fr; gap: var(--s-6); }
  .feature-row.reverse > *:first-child { order: 0; }
}
.feature-visual {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  aspect-ratio: 4 / 3;
}

/* ---------- Bullet list (custom) ---------- */
.check-list {
  list-style: none;
  padding: 0;
  margin: var(--s-5) 0;
}
.check-list li {
  position: relative;
  padding-left: 32px;
  margin-bottom: var(--s-3);
  color: var(--color-text-soft);
}
.check-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 4px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'><path d='M2 6.5L4.5 9L10 3.5' stroke='%232E5BFF' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
}
.section.deep .check-list li { color: var(--color-text-on-dark-soft); }
.section.deep .check-list li::before {
  background-color: rgba(46,91,255,0.18);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'><path d='M2 6.5L4.5 9L10 3.5' stroke='%236F8DFF' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/></svg>");
}

/* ---------- Logo strip ---------- */
.logo-strip {
  display: flex; flex-wrap: wrap;
  align-items: center; justify-content: center;
  gap: var(--s-7);
  padding: var(--s-5) 0;
  opacity: 0.7;
}
.logo-strip .logo-pill {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  color: var(--color-text-muted);
  letter-spacing: -0.01em;
}

/* ---------- Pipeline diagram ---------- */
.pipeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-3);
  margin: var(--s-5) 0;
  position: relative;
}
@media (max-width: 720px) { .pipeline { grid-template-columns: 1fr; } }
.pipe-stage {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--r-md);
  padding: var(--s-4);
  position: relative;
  text-align: center;
}
.pipe-stage .pipe-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.pipe-stage h4 {
  margin: var(--s-2) 0 var(--s-1);
  font-size: 15px;
  color: var(--color-text);
}
.pipe-stage p {
  font-size: 13px;
  margin: 0;
  color: var(--color-text-muted);
}

/* ---------- Quote block ---------- */
.quote {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.35;
  color: var(--color-text);
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}
.section.deep .quote { color: #fff; }
.quote-attr {
  display: block;
  margin-top: var(--s-5);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--color-text-muted);
}

/* ---------- Tag / chip ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-soft);
}
.chip-accent {
  background: var(--color-accent-soft);
  border-color: rgba(46,91,255,0.18);
  color: var(--color-accent);
}
.chip-row {
  display: flex; flex-wrap: wrap; gap: var(--s-2);
  margin-bottom: var(--s-4);
}

/* ---------- Form ---------- */
.form-grid {
  display: grid;
  gap: var(--s-4);
  max-width: 600px;
  margin: var(--s-6) auto 0;
}
.form-grid label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--s-2);
}
.form-grid input,
.form-grid textarea,
.form-grid select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--r-md);
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-text);
  background: #fff;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.form-grid input:focus,
.form-grid textarea:focus,
.form-grid select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(46,91,255,0.12);
}
.form-grid textarea { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-4); }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */
footer {
  background: var(--color-bg-deep);
  color: var(--color-text-on-dark-soft);
  padding: var(--s-9) 0 var(--s-5);
}
.footer-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--s-5);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--s-7);
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand { max-width: 320px; }
.footer-brand .nav-logo { color: #fff; margin-bottom: var(--s-3); }
.footer-brand .nav-logo .logo-mark { background: #fff; color: var(--color-text); }
.footer-brand .nav-logo .logo-mark::after { background: var(--color-accent); }
.footer-brand p {
  color: var(--color-text-on-dark-soft);
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}
footer h5 {
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 var(--s-4);
}
.footer-links {
  list-style: none;
  padding: 0; margin: 0;
}
.footer-links li { margin-bottom: var(--s-2); }
.footer-links a {
  color: var(--color-text-on-dark-soft);
  font-size: 14px;
  transition: color var(--t-fast);
}
.footer-links a:hover { color: #fff; }
.footer-bottom {
  max-width: var(--container-max);
  margin: var(--s-7) auto 0;
  padding: var(--s-5) var(--s-5) 0;
  border-top: 1px solid var(--color-border-on-dark);
  display: flex; justify-content: space-between;
  font-size: 13px;
  color: var(--color-text-muted);
  flex-wrap: wrap;
  gap: var(--s-3);
}

/* ---------- Cookie banner ---------- */
.cookie-banner {
  position: fixed; bottom: 16px; left: 16px; right: 16px;
  background: var(--color-bg-deep);
  color: #fff;
  padding: var(--s-4) var(--s-5);
  border-radius: var(--r-lg);
  display: none;
  z-index: 10000;
  box-shadow: var(--shadow-lg);
  max-width: 640px;
  margin: 0 auto;
}
.cookie-banner.show { display: block; }
.cookie-inner {
  display: flex; align-items: center; gap: var(--s-4); flex-wrap: wrap;
}
.cookie-inner p {
  margin: 0;
  font-size: 14px;
  flex: 1; min-width: 220px;
  color: var(--color-text-on-dark-soft);
}
.cookie-inner a { color: #6F8DFF; }
.cookie-actions { display: flex; gap: var(--s-2); }
.cookie-actions .btn {
  padding: 8px 16px;
  font-size: 13px;
}
.cookie-actions .btn-ghost {
  color: #fff;
  border-color: var(--color-border-on-dark);
}
.cookie-actions .btn-ghost:hover {
  background: #fff; color: var(--color-text); border-color: #fff;
}

/* ---------- Mobile nav ---------- */
@media (max-width: 860px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--s-3);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--color-border);
  }
  .nav-links.open { display: flex; }
  .nav-links li {
    width: 100%;
    padding: 10px var(--s-4);
    margin: 0;
  }
  .nav-links a.active::after { display: none; }
  .nav-links a.nav-cta { text-align: center; }
  .nav-toggle { display: block; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Status / banner ---------- */
.banner {
  padding: var(--s-4) var(--s-5);
  border-radius: var(--r-md);
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-soft);
  margin: var(--s-5) 0;
  font-size: 14px;
  color: var(--color-text);
}
.banner strong { color: var(--color-accent); }
.banner.signal { border-left-color: var(--color-signal); background: rgba(0,200,150,0.08); }
.banner.signal strong { color: #00805F; }

/* ---------- Process diagram (vertical) ---------- */
.process-list {
  list-style: none;
  padding: 0; margin: var(--s-6) 0;
  position: relative;
}
.process-list::before {
  content: '';
  position: absolute;
  left: 22px; top: 12px; bottom: 12px;
  width: 2px;
  background: var(--color-border);
}
.process-list li {
  position: relative;
  padding: 0 0 var(--s-6) 64px;
  margin: 0;
}
.process-list li::before {
  content: counter(step);
  counter-increment: step;
  position: absolute;
  left: 0; top: 0;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  z-index: 1;
}
.process-list { counter-reset: step; }
.process-list li h4 {
  margin: 4px 0 var(--s-2);
  color: var(--color-text);
  font-size: 18px;
}
.process-list li p {
  margin: 0;
  color: var(--color-text-soft);
}

/* ---------- ASCII / mono boxes ---------- */
.mono-box {
  background: var(--color-bg-deep);
  color: #A8B2C7;
  padding: var(--s-5);
  border-radius: var(--r-md);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
  overflow-x: auto;
  white-space: pre;
}
.mono-box .hl { color: #6F8DFF; }
.mono-box .ok { color: #00C896; }

/* ---------- Tabs (simple) ---------- */
.tabs {
  display: flex;
  gap: var(--s-2);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--s-5);
  flex-wrap: wrap;
}
.tab {
  background: none;
  border: 0;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.tab:hover { color: var(--color-text); }
.tab.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.text-mono { font-family: var(--font-mono); font-size: 13px; }
.text-soft { color: var(--color-text-soft); }
.text-muted { color: var(--color-text-muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-md { margin-top: var(--s-5); }
.mt-lg { margin-top: var(--s-7); }
.mb-md { margin-bottom: var(--s-5); }
.flex-center { display: flex; align-items: center; justify-content: center; }