/* =============================================================
   Mandelbrot LLC — Main Stylesheet
   ============================================================= */

/* -------------------------------------------------------------
   CSS Custom Properties
   ------------------------------------------------------------- */
:root {
  /* Colors */
  --color-bg:           #ffffff;
  --color-bg-alt:       #f5f6f8;
  --color-bg-dark:      #0d1117;
  --color-bg-dark-2:    #161b22;
  --color-text:         #111827;
  --color-text-muted:   #6b7280;
  --color-text-inverse: #f0f2f5;
  --color-accent:       #1d4ed8;
  --color-accent-hover: #1e40af;
  --color-border:       #e5e7eb;
  --color-border-dark:  #30363d;

  /* Typography */
  --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

  /* Scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  /* Layout */
  --max-width:     1200px;
  --max-width-sm:  720px;
  --gutter:        1.5rem;
  --section-gap:   5rem;

  /* Spacing scale */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Misc */
  --radius:     3px;
  --transition: 150ms ease;
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08);
  --shadow-md:  0 4px 12px rgba(0,0,0,.10);
}

/* -------------------------------------------------------------
   Reset & Base
   ------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

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

a:hover {
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

/* -------------------------------------------------------------
   Layout Utilities
   ------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--sm {
  max-width: var(--max-width-sm);
}

.container--sm p {
  max-width: none;
}

/* -------------------------------------------------------------
   Typography
   ------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl)); }
h2 { font-size: clamp(var(--text-2xl), 3.5vw, var(--text-4xl)); }
h3 { font-size: clamp(var(--text-xl),  2.5vw, var(--text-2xl)); }
h4 { font-size: var(--text-lg); }

p { max-width: 68ch; }

p + p { margin-top: 1em; }

.text-muted { color: var(--color-text-muted); }

.eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 1.5rem;
  margin-block: 2rem;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  font-style: italic;
  max-width: 68ch;
}

blockquote cite {
  display: block;
  margin-top: 0.75rem;
  font-size: var(--text-sm);
  font-style: normal;
  font-weight: 600;
  color: var(--color-text);
}

/* -------------------------------------------------------------
   Buttons
   ------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  font-family: var(--font);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  text-decoration: none;
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn--outline:hover {
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
}

.btn--outline-inverse {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.5);
}

.btn--outline-inverse:hover {
  border-color: #fff;
  background: rgba(255,255,255,.08);
  text-decoration: none;
  color: #fff;
}

.btn--lg {
  padding: 0.85rem 2rem;
  font-size: var(--text-base);
}

/* -------------------------------------------------------------
   Site Header & Nav
   ------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.site-logo {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo:hover { text-decoration: none; color: var(--color-text); }

.site-logo span {
  color: var(--color-accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--color-text);
  background: var(--color-bg-alt);
  text-decoration: none;
}

.site-nav__cta {
  margin-left: 0.5rem;
  color: #fff;
}

.site-nav__cta:hover {
  color: #fff;
}

/* Products dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown__trigger {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font);
}

.nav-dropdown__caret {
  width: 0.65rem;
  height: 0.65rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.nav-dropdown__trigger[aria-expanded="true"] .nav-dropdown__caret {
  transform: rotate(180deg);
}

.nav-dropdown__menu {
  position: absolute;
  top: calc(100% + 0.375rem);
  left: 0;
  min-width: 175px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.375rem;
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.nav-dropdown__menu[hidden] { display: none; }

.nav-dropdown__item {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav-dropdown__item:hover {
  color: var(--color-text);
  background: var(--color-bg-alt);
  text-decoration: none;
}

@keyframes nav-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.35; }
}

.nav-dropdown__item--pinned {
  color: #f97316;
  animation: nav-pulse 2s ease-in-out infinite;
}

.nav-dropdown__item--pinned:hover {
  color: #fb923c;
  background: var(--color-bg-alt);
  animation: none;
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem;
  border-radius: var(--radius);
  transition: color var(--transition);
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--color-text); }
.theme-toggle .icon-moon { display: none; }
.theme-toggle[data-theme="light"] .icon-sun  { display: none; }
.theme-toggle[data-theme="light"] .icon-moon { display: inline; }

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* -------------------------------------------------------------
   Hero Section
   ------------------------------------------------------------- */
.hero {
  background-color: var(--color-bg-dark);
  background-image:
    linear-gradient(to right, var(--color-bg-dark) 35%, rgba(6,10,18,0.55) 100%),
    url('../images/mandelbrot_set_fractal.jpg');
  background-size: cover;
  background-position: center right;
  background-repeat: no-repeat;
  color: var(--color-text-inverse);
  padding-block: clamp(4rem, 10vw, 7rem);
}

.hero__inner {
  display: grid;
  gap: 2rem;
  max-width: 800px;
}

.hero__eyebrow {
  color: rgba(255,255,255,.5);
}

.hero__heading {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero__subhead {
  font-size: clamp(var(--text-base), 2vw, var(--text-lg));
  color: rgba(255,255,255,.65);
  max-width: 56ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

/* -------------------------------------------------------------
   Section Wrappers
   ------------------------------------------------------------- */
.section {
  padding-block: var(--section-gap);
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--dark {
  background: var(--color-bg-dark-2);
  color: var(--color-text-inverse);
}

.section__header {
  margin-bottom: 3rem;
}

.section__header--center {
  text-align: center;
}

.section__header--center p {
  margin-inline: auto;
}

.section__title + p,
.section__header p {
  margin-top: 0.75rem;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}

.section--dark .section__title + p {
  color: rgba(255,255,255,.55);
}

/* -------------------------------------------------------------
   Grid Layouts
   ------------------------------------------------------------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

/* -------------------------------------------------------------
   Feature / Service Cards
   ------------------------------------------------------------- */
.feature-card {
  padding: 2rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.section--alt .feature-card {
  background: var(--color-bg);
}

.feature-card__icon {
  width: 40px;
  height: 40px;
  background: var(--color-accent);
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--text-lg);
  font-weight: 700;
  flex-shrink: 0;
}

.feature-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.feature-card__body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: none;
}

/* -------------------------------------------------------------
   Product Cards
   ------------------------------------------------------------- */
.product-card {
  display: flex;
  flex-direction: column;
  padding: 2rem;
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius);
  color: var(--color-text-inverse);
  text-decoration: none;
  transition: border-color var(--transition);
}

.product-card:hover {
  border-color: var(--color-accent);
  text-decoration: none;
}

.product-card__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.product-card__title {
  font-size: var(--text-2xl);
  margin-bottom: 0.75rem;
  color: #fff;
}

.product-card__body {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.55);
  flex: 1;
  max-width: none;
}

.product-card__link {
  margin-top: 1.5rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
}

/* -------------------------------------------------------------
   Callout / Quote Block
   ------------------------------------------------------------- */
.callout {
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  padding: 2rem 2.5rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.callout__quote {
  font-size: clamp(var(--text-lg), 2.5vw, var(--text-2xl));
  font-weight: 500;
  font-style: italic;
  line-height: 1.5;
  color: var(--color-text);
  max-width: 72ch;
}

.callout__attribution {
  margin-top: 1rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}

/* -------------------------------------------------------------
   Stat Bar
   ------------------------------------------------------------- */
.stat-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stat-bar__item {
  padding: 2rem 1.5rem;
  border-right: 1px solid var(--color-border);
  text-align: center;
}

.stat-bar__item:last-child { border-right: none; }

.stat-bar__value {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-accent);
}

.stat-bar__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.25rem;
}

/* -------------------------------------------------------------
   Prose (Long-form content)
   ------------------------------------------------------------- */
.prose {
  max-width: 68ch;
}

.prose h2 { margin-top: 2.5rem; margin-bottom: 0.75rem; }
.prose h3 { margin-top: 2rem; margin-bottom: 0.5rem; }
.prose p  { margin-bottom: 1.25rem; }
.prose ul, .prose ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4rem; }

/* -------------------------------------------------------------
   Site Footer
   ------------------------------------------------------------- */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,.55);
  padding-block: 3.5rem 2rem;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--color-border-dark);
}

.footer-brand__name {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: 0.75rem;
}

.footer-brand__tagline {
  font-size: var(--text-sm);
  line-height: 1.6;
  max-width: 28ch;
}

.footer-nav__heading {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,.35);
  margin-bottom: 1rem;
}

.footer-nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-nav__list a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,.55);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-nav__list a:hover {
  color: #fff;
  text-decoration: none;
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.75rem;
  font-size: var(--text-xs);
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* -------------------------------------------------------------
   Hero Credentials
   ------------------------------------------------------------- */
.hero__credentials {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 2rem;
  padding-bottom: 0.5rem;
}

.hero__cred-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hero__cred--svg {
  height: 32px;
  width: auto;
}

.hero__cred--badge {
  height: 72px;
  width: auto;
  border-radius: 50%;
}

/* -------------------------------------------------------------
   Announce Ticker (top of page, below nav)
   ------------------------------------------------------------- */
.announce-ticker {
  background: var(--color-accent);
  padding-block: 0.2rem;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.announce-track {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  gap: 0;
  animation: announce-scroll 55s linear infinite;
}

.announce-ticker:hover .announce-track {
  animation-play-state: paused;
}

.announce-track span {
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 1.4;
  color: rgba(255,255,255,.9);
  padding-inline: 0.5rem;
}

.announce-sep {
  color: rgba(255,255,255,.45);
  font-size: 0.45rem;
  flex-shrink: 0;
  padding-inline: 0.4rem;
}

.announce-link {
  color: #fff;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.announce-link:hover {
  text-decoration: none;
  color: #fff;
}

@keyframes announce-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(var(--announce-offset, -50%)); }
}

/* -------------------------------------------------------------
   Ticker Strip
   ------------------------------------------------------------- */
.ticker-strip {
  background: var(--color-bg-dark-2);
  border-bottom: 1px solid var(--color-border-dark);
  padding-block: 0.65rem;
  overflow: hidden;
  white-space: nowrap;
}

.ticker-track {
  display: inline-flex;
  gap: 0;
  animation: ticker 60s linear infinite;
}

.ticker-strip:hover .ticker-track {
  animation-play-state: paused;
}

.ticker-item {
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255,255,255,.65);
  padding-inline: 1rem;
}

.ticker-sep {
  color: var(--color-accent);
  font-size: 0.5rem;
  align-self: center;
  flex-shrink: 0;
}

@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* -------------------------------------------------------------
   About Split
   ------------------------------------------------------------- */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-split__text h2 {
  margin-top: 0.5rem;
  margin-bottom: 1.25rem;
}

/* -------------------------------------------------------------
   Blog Cards
   ------------------------------------------------------------- */
.blog-card {
  padding: 2rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.section--alt .blog-card {
  background: var(--color-bg);
}

.blog-card__meta {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.blog-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.blog-card__title a {
  color: var(--color-text);
  text-decoration: none;
}

.blog-card__title a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.blog-card__body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: none;
}

/* -------------------------------------------------------------
   CTA Banner
   ------------------------------------------------------------- */
.cta-banner {
  background: var(--color-accent);
  padding-block: 4rem;
}

.cta-banner__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.cta-banner__heading {
  font-size: clamp(var(--text-xl), 3vw, var(--text-3xl));
  color: #fff;
  margin-bottom: 0.5rem;
}

.cta-banner__sub {
  color: rgba(255,255,255,.8);
  font-size: var(--text-base);
  max-width: 55ch;
}

.cta-banner .btn--primary {
  background: #fff;
  color: var(--color-accent);
  border-color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}

.cta-banner .btn--primary:hover {
  background: rgba(255,255,255,.9);
  border-color: rgba(255,255,255,.9);
  color: var(--color-accent);
}

.cta-banner--dark {
  background: var(--color-accent);
  border-top: none;
  border-bottom: none;
}

.cta-banner--dark .cta-banner__heading {
  color: #fff;
}

.cta-banner--dark .cta-banner__sub {
  color: rgba(255,255,255,.8);
}

/* "See all products" spacing */
.products-more {
  margin-top: 2.5rem;
}

/* -------------------------------------------------------------
   Responsive
   ------------------------------------------------------------- */
@media (max-width: 768px) {
  :root {
    --section-gap: 3.5rem;
    --gutter: 1.25rem;
  }

  /* Nav */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem var(--gutter) 1.25rem;
    gap: 0.25rem;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav__link {
    padding: 0.6rem 0.75rem;
  }

  .site-nav__cta {
    margin-left: 0;
    margin-top: 0.5rem;
  }

  /* Dropdown — inline on mobile */
  .nav-dropdown {
    display: flex;
    flex-direction: column;
  }

  .nav-dropdown__trigger {
    width: 100%;
    justify-content: space-between;
  }

  .nav-dropdown__menu {
    position: static;
    box-shadow: none;
    border: none;
    border-left: 2px solid var(--color-border);
    border-radius: 0;
    padding: 0.25rem 0 0.25rem 0.75rem;
    margin-top: 0.125rem;
    margin-left: 0.75rem;
  }

  /* Hero — zoom into left antenna, anchored to top of hero */
  .hero {
    background-image:
      linear-gradient(to bottom, rgba(6,10,18,0) 0%, rgba(6,10,18,1) 45%),
      url('../images/mandelbrot_set_fractal.jpg');
    background-position: 25% 0%;
    background-size: 200%;
    min-height: 620px;
  }

  /* About split */
  .about-split {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  /* CTA banner */
  .cta-banner__inner {
    flex-direction: column;
    text-align: center;
  }

  .cta-banner__sub {
    margin-inline: auto;
  }

  /* Footer */
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  /* Stat bar */
  .stat-bar {
    grid-template-columns: 1fr 1fr;
  }

  .stat-bar__item:nth-child(2) { border-right: none; }
  .stat-bar__item:nth-child(3) { border-right: 1px solid var(--color-border); }
  .stat-bar__item:nth-child(n+3) { border-top: 1px solid var(--color-border); }
}

@media (max-width: 480px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .hero__heading {
    overflow-wrap: break-word;
    hyphens: none;
  }

  .hero__inner {
    padding-top: 45%;
  }
}


/* =============================================================
   Page Hero (inner pages)
   ============================================================= */
.page-hero {
  padding: var(--space-16) 0 var(--space-12);
  background-color: var(--color-bg-dark);
  background-image:
    linear-gradient(to right, var(--color-bg-dark) 35%, rgba(6,10,18,0.55) 100%),
    url('../images/mandelbrot_set_fractal.jpg');
  background-size: cover;
  background-position: center right;
  background-repeat: no-repeat;
  color: var(--color-text-inverse);
}

.page-hero__title {
  font-size: var(--text-4xl);
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.page-hero__sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin: 0;
  color: #9ca3af;
}


/* =============================================================
   Contact Page
   ============================================================= */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--space-12);
  align-items: start;
}

@media (max-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr;
  }
}

/* Form */
.contact-form-wrap > p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
}

.form-required-note {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-row {
  display: flex;
  gap: var(--space-4);
}

.form-row--half > .form-group {
  flex: 1;
}

@media (max-width: 540px) {
  .form-row--half {
    flex-direction: column;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font: inherit;
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.15s;
  width: 100%;
  box-sizing: border-box;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.12);
}

.form-group textarea {
  resize: vertical;
}

.required {
  color: #dc2626;
}

.char-count {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: right;
}

.form-notice {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.form-status {
  font-size: var(--text-sm);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  display: none;
}

.form-status:not(:empty) {
  display: block;
}

.form-status--success {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.form-status--error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

/* Contact Info sidebar */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.contact-info__block {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-5);
}

.contact-info__heading {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 0 0 0.5rem;
}

.contact-info__block p,
.contact-info__block address {
  font-size: var(--text-base);
  font-style: normal;
  line-height: 1.6;
  margin: 0 0 0.25rem;
}

.contact-info__block a {
  color: var(--color-accent);
  text-decoration: none;
}

.contact-info__block a:hover {
  text-decoration: underline;
}

.contact-info__note {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Honeypot field — visually hidden but not display:none */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  tab-size: 0;
}

/* Fieldsets / radio groups */
.form-fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5) var(--space-6);
}

.form-fieldset legend {
  font-size: var(--text-sm);
  font-weight: 700;
  padding: 0 0.375rem;
  color: var(--color-text);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.radio-label {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: var(--text-base);
  color: var(--color-text);
  cursor: pointer;
  line-height: 1.4;
}

.radio-label input[type="radio"] {
  flex-shrink: 0;
  margin-top: 0.2em;
  accent-color: var(--color-accent);
  width: auto;
}

.conditional-input {
  display: none;
  padding-left: 1.5rem;
}

.conditional-input--visible {
  display: block;
}

.conditional-input input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font: inherit;
  font-size: var(--text-sm);
  color: var(--color-text);
  background: var(--color-bg);
  box-sizing: border-box;
}

.conditional-input input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.12);
}


/* =============================================================
   About Page
   ============================================================= */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: var(--space-12);
  align-items: start;
}

@media (max-width: 768px) {
  .about-layout {
    grid-template-columns: 1fr;
  }
}

.about-body h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin: var(--space-10) 0 var(--space-4);
  color: var(--color-text);
}

.about-body h2:first-child {
  margin-top: 0;
}

.about-body p {
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.about-quote {
  border-left: 3px solid var(--color-accent);
  margin: var(--space-10) 0;
  padding: var(--space-5) var(--space-6);
  background: var(--color-bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.about-quote p {
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.about-quote cite {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: normal;
}

/* Sidebar */
.about-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.about-sidebar__block {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-5);
}

.about-sidebar__heading {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}

.about-sidebar__block p {
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  margin: 0 0 var(--space-1);
}

.about-sidebar__block a:not(.btn) {
  color: var(--color-accent);
  text-decoration: none;
}

.about-sidebar__block a:not(.btn):hover {
  text-decoration: underline;
}

.about-sidebar__links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.about-sidebar__links a {
  color: var(--color-accent);
  text-decoration: none;
  font-size: var(--text-base);
}

.about-sidebar__links a:hover {
  text-decoration: underline;
}


/* =============================================================
   About Page
   ============================================================= */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: var(--space-12);
  align-items: start;
}

@media (max-width: 768px) {
  .about-layout {
    grid-template-columns: 1fr;
  }
}

.about-body h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin: var(--space-10) 0 var(--space-4);
  color: var(--color-text);
}

.about-body h2:first-child {
  margin-top: 0;
}

.about-body p {
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.about-quote {
  border-left: 3px solid var(--color-accent);
  margin: var(--space-10) 0;
  padding: var(--space-5) var(--space-6);
  background: var(--color-bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.about-quote p {
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.about-quote cite {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: normal;
}

/* Sidebar */
.about-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.about-sidebar__block {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-5);
}

.about-sidebar__heading {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}

.about-sidebar__block p {
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  margin: 0 0 var(--space-1);
}

.about-sidebar__block a:not(.btn) {
  color: var(--color-accent);
  text-decoration: none;
}

.about-sidebar__block a:not(.btn):hover {
  text-decoration: underline;
}

.about-sidebar__links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.about-sidebar__links a {
  color: var(--color-accent);
  text-decoration: none;
  font-size: var(--text-base);
}

.about-sidebar__links a:hover {
  text-decoration: underline;
}