/* ============================================
   137Foundry — Visual Design
   Warm industrial aesthetic, solo operator energy
   ============================================ */

/* --- Custom Properties --- */
:root {
  /* Foundry palette — warm copper/amber accent on warm neutrals */
  --color-accent: #C07840;
  --color-accent-hover: #A86530;
  --color-accent-subtle: rgba(192, 120, 64, 0.08);
  --color-accent-glow: rgba(192, 120, 64, 0.15);

  /* Light mode — warm cream, not clinical white */
  --bg-body: #FAF7F4;
  --bg-surface: #FFFFFF;
  --bg-surface-alt: #F3EFEB;
  --bg-nav: rgba(250, 247, 244, 0.88);
  --bg-code: #F3EFEB;
  --text-primary: #1A1816;
  --text-secondary: #4A4540;
  --text-muted: #8A8480;
  --border-color: #E5E0DB;
  --border-color-light: #EEEAE6;
  --shadow-sm: 0 1px 3px rgba(26, 24, 22, 0.04);
  --shadow-md: 0 4px 12px rgba(26, 24, 22, 0.06);
  --shadow-lg: 0 12px 32px rgba(26, 24, 22, 0.08);
  --shadow-accent: 0 4px 16px rgba(192, 120, 64, 0.12);
  --focus-ring: 0 0 0 2px var(--bg-body), 0 0 0 4px var(--color-accent);

  /* Grain overlay */
  --grain: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");

  /* Typography */
  --font-heading: 'Satoshi', system-ui, -apple-system, sans-serif;
  --font-body: 'Switzer', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;
  --space-4xl: 7rem;
  --space-5xl: 10rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 64px;
  --border-radius: 6px;
  --border-radius-lg: 10px;
  --border-radius-xl: 14px;

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Dark Mode — warm, rich, not inverted --- */
[data-theme="dark"] {
  --bg-body: #141210;
  --bg-surface: #1E1C1A;
  --bg-surface-alt: #1A1816;
  --bg-nav: rgba(20, 18, 16, 0.88);
  --bg-code: #1A1816;
  --text-primary: #F0ECE8;
  --text-secondary: #B5AFA8;
  --text-muted: #7A756F;
  --border-color: #2E2A27;
  --border-color-light: #242220;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.3);
  --shadow-accent: 0 4px 16px rgba(192, 120, 64, 0.08);
  --color-accent: #D4915E;
  --color-accent-hover: #E0A06A;
  --color-accent-subtle: rgba(212, 145, 94, 0.07);
  --color-accent-glow: rgba(212, 145, 94, 0.1);
}

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

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

@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;
  }
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-primary);
  background-color: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Subtle grain texture */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: var(--grain);
  background-repeat: repeat;
  background-size: 256px 256px;
  pointer-events: none;
  z-index: 9999;
  opacity: 1;
}

main {
  flex: 1;
  padding-top: var(--nav-height);
}

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

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* --- Focus --- */
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: 3px;
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius);
  font-weight: 600;
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-md);
  color: #fff;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 900;
  margin-bottom: var(--space-lg);
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
  max-width: 64ch;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-2xl);
  }
}

/* --- Navigation --- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  display: flex;
  align-items: center;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

@media (min-width: 768px) {
  .nav-inner {
    padding: 0 var(--space-2xl);
  }
}

/* Logo — the "137" is the brand mark */
.logo {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 0.05em;
  letter-spacing: -0.04em;
}

.logo:hover {
  color: var(--text-primary);
}

.logo-number {
  color: var(--color-accent);
  font-weight: 900;
  font-size: 1.4em;
  line-height: 1;
  letter-spacing: -0.05em;
}

.logo-text {
  color: var(--text-primary);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 0.85em;
  letter-spacing: 0.06em;
}

/* Desktop Nav */
.nav-links {
  display: none;
  list-style: none;
  align-items: center;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: var(--space-xs) 0;
  position: relative;
  transition: color var(--transition-base);
  letter-spacing: 0.01em;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-accent);
  transition: width var(--transition-slow);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* Nav CTA */
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-accent);
  color: #fff !important;
  padding: 0.45rem 1.1rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
}

.nav-cta:hover {
  background: var(--color-accent-hover);
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent);
}

.nav-cta::after {
  display: none !important;
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .icon-sun,
[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

.theme-toggle .icon-moon {
  display: block;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  width: 44px;
  height: 44px;
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.mobile-menu-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-body);
  padding: var(--space-xl) var(--space-lg);
  z-index: 99;
  overflow-y: auto;
}

.mobile-menu.is-open {
  display: block;
}

@media (min-width: 768px) {
  .mobile-menu {
    display: none !important;
  }
}

.mobile-menu-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mobile-menu-links a {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-color);
  text-decoration: none;
}

.mobile-menu-links a:hover {
  color: var(--color-accent);
}

.mobile-menu-links .nav-cta {
  display: inline-block;
  text-align: center;
  margin-top: var(--space-lg);
  border-bottom: none;
  font-size: 1rem;
}

/* --- Sections --- */
.section {
  padding: var(--space-3xl) 0;
}

.section-lg {
  padding: var(--space-4xl) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-4xl) 0;
  }
  .section-lg {
    padding: var(--space-5xl) 0;
  }
}

.section-header {
  margin-bottom: var(--space-2xl);
}

@media (min-width: 768px) {
  .section-header {
    margin-bottom: var(--space-3xl);
  }
}

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

/* Thin accent divider line */
.section-header h2::after {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  margin-top: var(--space-md);
}

/* --- Hero --- */
.hero {
  padding: var(--space-4xl) 0 var(--space-3xl);
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .hero {
    padding: var(--space-5xl) 0 var(--space-4xl);
  }
}

.hero h1 {
  max-width: 14ch;
  animation: fadeInUp 0.6s ease both;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 48ch;
  margin-bottom: var(--space-xl);
  line-height: 1.7;
  animation: fadeInUp 0.6s ease 0.12s both;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  animation: fadeInUp 0.6s ease 0.24s both;
}

/* Hero entrance animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.7rem 1.4rem;
  font-family: var(--font-body);
  font-size: 0.925rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  border: none;
  min-height: 44px;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.btn-lg {
  padding: 0.85rem 1.8rem;
  font-size: 1rem;
}

/* --- Cards --- */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  /* Featured first card spans wider */
  .card-grid .card:first-child {
    grid-column: span 2;
  }
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl) var(--space-lg);
  transition: border-color var(--transition-slow), box-shadow var(--transition-slow), transform var(--transition-slow);
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: inherit;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.card:hover {
  border-color: var(--border-color);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  color: inherit;
}

.card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-subtle);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-md);
  color: var(--color-accent);
  border: 1px solid var(--color-accent-glow);
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

.card h3 {
  color: var(--text-primary);
}

.card p {
  color: var(--text-secondary);
  margin-bottom: 0;
  font-size: 0.925rem;
  line-height: 1.6;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-accent);
  font-weight: 500;
  font-size: 0.85rem;
  margin-top: var(--space-md);
  font-family: var(--font-heading);
  letter-spacing: 0.01em;
}

.card-link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-slow);
}

.card:hover .card-link svg {
  transform: translateX(4px);
}

/* --- Scroll animations --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-stagger.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- About Teaser --- */
.about-teaser {
  position: relative;
  border-radius: var(--border-radius-xl);
  padding: var(--space-2xl);
  background: var(--bg-surface-alt);
  border-left: 3px solid var(--color-accent);
}

@media (min-width: 768px) {
  .about-teaser {
    padding: var(--space-3xl) var(--space-3xl) var(--space-3xl) var(--space-2xl);
  }
}

.about-teaser h2 {
  margin-bottom: var(--space-md);
}

.about-teaser h2::after {
  display: none;
}

.about-teaser p {
  font-size: 1.02rem;
  line-height: 1.7;
}

/* --- CTA Section --- */
.cta-section {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-xl);
  padding: var(--space-2xl);
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

@media (min-width: 768px) {
  .cta-section {
    padding: var(--space-3xl) var(--space-2xl);
  }
}

.cta-section h2 {
  color: var(--text-primary);
}

.cta-section h2::after {
  margin-left: auto;
  margin-right: auto;
}

.cta-section p {
  color: var(--text-secondary);
  margin: 0 auto var(--space-xl);
}

/* --- Service Page --- */
.service-page {
  padding: var(--space-2xl) 0 var(--space-3xl);
}

@media (min-width: 768px) {
  .service-page {
    padding: var(--space-3xl) 0 var(--space-4xl);
  }
}

.service-page h1 {
  margin-bottom: var(--space-md);
}

.service-intro {
  font-size: 1.05rem;
  max-width: 60ch;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.service-section {
  margin-bottom: var(--space-2xl);
}

.service-section h2 {
  margin-bottom: var(--space-md);
}

.service-section h2::after {
  display: none;
}

.service-list {
  list-style: none;
  margin-bottom: var(--space-lg);
}

.service-list li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.service-list li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 0.7em;
  width: 5px;
  height: 1.5px;
  background: var(--color-accent);
}

/* --- Contact Form --- */
.contact-form {
  max-width: 600px;
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-weight: 500;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
  font-size: 0.875rem;
  letter-spacing: 0.01em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: var(--focus-ring);
}

.form-group textarea {
  min-height: 130px;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.hp-field {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
}

.form-status {
  padding: var(--space-md);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-lg);
  font-weight: 500;
  font-size: 0.925rem;
}

.form-status.success,
.form-status-success {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.form-status.error,
.form-status-error {
  background: rgba(200, 60, 50, 0.06);
  color: #C83C32;
  border: 1px solid rgba(200, 60, 50, 0.2);
}

[data-theme="dark"] .form-status.error,
[data-theme="dark"] .form-status-error {
  color: #E8695E;
  border-color: rgba(232, 105, 94, 0.2);
  background: rgba(232, 105, 94, 0.06);
}

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

.contact-info-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-secondary);
}

.contact-info-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-info-item a {
  color: var(--text-secondary);
}

.contact-info-item a:hover {
  color: var(--color-accent);
}

/* --- Two Column --- */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

@media (min-width: 768px) {
  .two-col {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
  }
}

.two-col-wide {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

@media (min-width: 768px) {
  .two-col-wide {
    grid-template-columns: 2fr 1fr;
    gap: var(--space-3xl);
  }
}

/* --- Legal --- */
.legal-page {
  padding: var(--space-2xl) 0 var(--space-3xl);
}

.legal-page h1 {
  margin-bottom: var(--space-sm);
}

.legal-date {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  margin-bottom: var(--space-2xl);
}

.legal-content h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  font-size: 1.25rem;
}

.legal-content h2::after {
  display: none;
}

.legal-content p {
  margin-bottom: var(--space-md);
}

.legal-content ul {
  list-style: none;
  margin-bottom: var(--space-md);
}

.legal-content ul li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.legal-content ul li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 0.7em;
  width: 5px;
  height: 1.5px;
  background: var(--color-accent);
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-surface-alt);
  border-top: 1px solid var(--border-color);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand .logo {
  margin-bottom: var(--space-md);
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-nav h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.footer-nav ul {
  list-style: none;
}

.footer-nav ul li {
  margin-bottom: var(--space-sm);
}

.footer-nav ul a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-nav ul a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

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

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

/* --- Utility --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

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

.optional {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.85em;
}

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }