/* ============================================
   THE BOOTSTRAP FACTORY — Design System
   Aesthetic: Refined Industrial Blueprint
   ============================================ */

/* --------------------------------------------
   Design Tokens
   -------------------------------------------- */
:root {
  /* Colors: Dark industrial palette with warm copper accent */
  --color-bg-deep: #0a0c0f;
  --color-bg: #12151a;
  --color-bg-elevated: #1a1e25;
  --color-bg-surface: #232830;

  --color-text: #e8e6e3;
  --color-text-muted: #a8b0ba; /* Improved contrast: 9.2:1 on --color-bg-deep */
  --color-text-subtle: #8b9199; /* Improved contrast: 6.5:1 on --color-bg-deep */

  --color-accent: #d97706;
  --color-accent-light: #f59e0b;
  --color-accent-glow: rgba(217, 119, 6, 0.15);

  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.15);

  /* Blueprint grid color */
  --color-grid: rgba(217, 119, 6, 0.03);
  --color-grid-strong: rgba(217, 119, 6, 0.06);

  /* Typography */
  --font-display: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
  --font-serif: 'Source Serif 4', Georgia, serif;

  --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: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;
  --text-6xl: 4.5rem;

  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 72rem;
  --container-narrow: 48rem;
  --container-padding: clamp(1.5rem, 5vw, 3rem);

  /* Effects */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px var(--color-accent-glow);

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg-deep);
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

/* --------------------------------------------
   Blueprint Grid Overlay
   -------------------------------------------- */
.grid-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--color-grid-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid-strong) 1px, transparent 1px),
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size:
    100px 100px,
    100px 100px,
    20px 20px,
    20px 20px;
  background-position: -1px -1px;
  opacity: 0.8;
}

/* --------------------------------------------
   Container
   -------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-inline: var(--container-padding);
  position: relative;
  z-index: 1;
}

/* --------------------------------------------
   Site Header
   -------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-lg) 0;
  background: linear-gradient(to bottom, var(--color-bg-deep), transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.logo-mark {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  color: var(--color-accent);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
}

.logo-text {
  font-weight: 600;
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-tight);
}

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

.nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav a:hover {
  color: var(--color-text);
}

.nav-cta {
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-accent);
  color: var(--color-bg-deep) !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: background var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}

.nav-cta:hover {
  background: var(--color-accent-light);
  transform: translateY(-1px);
}

/* Mobile nav */
@media (max-width: 768px) {
  .nav a:not(.nav-cta) {
    display: none;
  }
}

/* --------------------------------------------
   Hero Section
   -------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-5xl) 0 var(--space-4xl);
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (min-width: 1024px) {
  .hero .container {
    grid-template-columns: 1.2fr 1fr;
  }
}

.hero-content {
  max-width: 40rem;
}

.hero-tagline {
  font-size: clamp(var(--text-4xl), 8vw, var(--text-6xl));
  font-weight: 800;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-xl);
}

.hero-tagline-main {
  display: block;
  color: var(--color-text);
}

.hero-tagline-accent {
  display: block;
  color: var(--color-accent);
  position: relative;
}

.hero-tagline-accent::after {
  content: '';
  position: absolute;
  bottom: 0.1em;
  left: 0;
  width: 100%;
  height: 0.08em;
  background: var(--color-accent);
  opacity: 0.3;
}

.hero-lead {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-style: italic;
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
  padding-left: var(--space-lg);
  border-left: 2px solid var(--color-accent);
  margin-bottom: var(--space-2xl);
}

.hero-lead p {
  margin: 0;
}

.hero-reframe {
  margin-bottom: var(--space-xl);
}

.reframe-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.reframe-text {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
}

.hero-subtext {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
  letter-spacing: var(--tracking-wide);
}

.hero-subtext + .hero-subtext {
  margin-top: var(--space-md);
}

/* Hero visual - terminal code aesthetic */
.hero-visual {
  position: relative;
  display: none;
}

@media (min-width: 1024px) {
  .hero-visual {
    display: block;
  }
}

.terminal {
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot-red { background: #ef4444; }
.terminal-dot-yellow { background: #eab308; }
.terminal-dot-green { background: #22c55e; }

.terminal-title {
  flex: 1;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  letter-spacing: var(--tracking-wide);
}

.terminal-body {
  padding: var(--space-lg);
  overflow-x: auto;
}

.terminal-code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin: 0;
  background: transparent;
  border: none;
  padding: 0;
}

.terminal-code code {
  display: block;
  white-space: pre;
}

/* Syntax highlighting */
.code-comment {
  color: var(--color-text-subtle);
  font-style: italic;
}

.code-keyword {
  color: var(--color-accent);
}

.code-class {
  color: var(--color-text);
  font-weight: 500;
}

.code-type {
  color: var(--color-accent-light);
}

.code-function {
  color: #60a5fa;
}

/* --------------------------------------------
   Problem Section
   -------------------------------------------- */
.problem {
  padding: var(--space-4xl) 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.problem-content {
  max-width: var(--container-narrow);
  margin: 0 auto;
  text-align: center;
}

.problem .section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.problem-headline {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-2xl);
}

.problem-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.problem-item {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  padding-left: var(--space-lg);
  border-left: 2px solid var(--color-border-strong);
  text-align: left;
}

/* --------------------------------------------
   Comparison Section
   -------------------------------------------- */
.comparison {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-deep);
}

.comparison-headline {
  font-size: clamp(var(--text-xl), 3vw, var(--text-2xl));
  font-weight: 600;
  text-align: center;
  margin: 0 auto var(--space-3xl);
  color: var(--color-text-muted);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  max-width: 56rem;
  margin: 0 auto;
}

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

.comparison-column {
  padding: var(--space-xl);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.comparison-prototype {
  background: var(--color-bg);
}

.comparison-product {
  background: var(--color-bg-elevated);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.comparison-label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}

.comparison-prototype .comparison-label {
  color: var(--color-text-subtle);
}

.comparison-product .comparison-label {
  color: var(--color-accent);
}

.comparison-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.comparison-list li {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  padding-left: var(--space-lg);
  position: relative;
}

.comparison-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-border-strong);
}

.comparison-product .comparison-list li::before {
  background: var(--color-accent);
}

/* --------------------------------------------
   Credibility Section
   -------------------------------------------- */
.credibility {
  padding: var(--space-2xl) 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.credibility-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm) var(--space-xl);
}

.credibility-item {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
  letter-spacing: var(--tracking-wide);
  position: relative;
}

.credibility-item:not(:last-child)::after {
  content: '|';
  position: absolute;
  right: calc(var(--space-xl) / -2 - 0.25rem);
  color: var(--color-border-strong);
}

@media (max-width: 768px) {
  .credibility-item:not(:last-child)::after {
    display: none;
  }
}

/* --------------------------------------------
   Positioning Section
   -------------------------------------------- */
.positioning {
  padding: var(--space-4xl) 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.positioning-text {
  max-width: var(--container-narrow);
  margin: 0 auto;
  font-size: var(--text-xl);
  line-height: var(--leading-relaxed);
  text-align: center;
  color: var(--color-text-muted);
}

.positioning-text strong {
  color: var(--color-text);
  font-weight: 600;
}

.positioning-text em {
  color: var(--color-accent);
  font-style: normal;
  font-weight: 500;
}

.positioning-subtext {
  max-width: var(--container-narrow);
  margin: var(--space-xl) auto 0;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  text-align: center;
  color: var(--color-text-subtle);
  letter-spacing: var(--tracking-wide);
}

/* --------------------------------------------
   Section Headers
   -------------------------------------------- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-4xl));
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-lg);
}

.section-intro {
  margin: 0 auto;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}

/* --------------------------------------------
   Methodology Section
   -------------------------------------------- */
.methodology {
  padding: var(--space-5xl) 0;
  background: var(--color-bg-deep);
}

.phases {
  display: grid;
  gap: var(--space-lg);
  max-width: 56rem;
  margin: 0 auto;
}

.phase {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-xl);
  padding: var(--space-xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.phase:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow);
}

.phase-number {
  font-family: var(--font-mono);
  font-size: var(--text-4xl);
  font-weight: 500;
  color: var(--color-accent);
  opacity: 0.3;
  line-height: 1;
}

.phase-name {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.phase-question {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.phase-description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

/* --------------------------------------------
   Services Section
   -------------------------------------------- */
.services {
  padding: var(--space-5xl) 0;
  background: var(--color-bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.service {
  padding: var(--space-xl);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}

.service:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
}

.service-type {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent-glow);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-lg);
}

.service-title {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: var(--leading-snug);
  margin-bottom: var(--space-md);
}

.service-description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

/* --------------------------------------------
   CTA Section
   -------------------------------------------- */
.cta {
  padding: var(--space-5xl) 0;
  background: var(--color-bg-deep);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 800px;
  height: 800px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.cta-headline {
  font-size: clamp(var(--text-2xl), 5vw, var(--text-4xl));
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-md);
  position: relative;
}

.cta-subtext {
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
  position: relative;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-2xl);
  background: var(--color-accent);
  color: var(--color-bg-deep);
  font-size: var(--text-lg);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  position: relative;
}

.cta-button:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.cta-button svg {
  transition: transform var(--duration-fast) var(--ease-out);
}

.cta-button:hover svg {
  transform: translateX(4px);
}

/* --------------------------------------------
   Footer
   -------------------------------------------- */
.site-footer {
  padding: var(--space-4xl) 0 var(--space-xl);
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: 2fr 1fr;
  }
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  color: var(--color-accent);
  display: inline;
}

.footer-company {
  font-size: var(--text-base);
  font-weight: 600;
  margin-left: var(--space-sm);
}

.footer-location {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
}

.footer-email {
  font-size: var(--text-sm);
}

.footer-email a {
  color: var(--color-accent);
  transition: color var(--duration-fast) var(--ease-out);
}

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

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 28rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-out);
}

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

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  letter-spacing: var(--tracking-wide);
}

/* --------------------------------------------
   Animations & Scroll Effects
   -------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .hero-content > * {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s var(--ease-out) forwards;
  }

  .hero-tagline { animation-delay: 0.1s; }
  .hero-lead { animation-delay: 0.2s; }
  .hero-reframe { animation-delay: 0.3s; }
  .hero-subtext { animation-delay: 0.4s; }

  @keyframes fadeInUp {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .phase,
  .service {
    opacity: 0;
    transform: translateY(20px);
  }

  .phase.visible,
  .service.visible {
    animation: fadeInUp 0.6s var(--ease-out) forwards;
  }
}

/* --------------------------------------------
   Selection Styles
   -------------------------------------------- */
::selection {
  background: var(--color-accent);
  color: var(--color-bg-deep);
}

/* --------------------------------------------
   Skip Link (Accessibility)
   -------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-bg-deep);
  padding: var(--space-sm) var(--space-lg);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-weight: 600;
  font-size: var(--text-sm);
  z-index: 9999;
  transition: top var(--duration-fast) var(--ease-out);
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-accent-light);
  outline-offset: 2px;
}

/* Remove outline from main when focused via skip link */
main:focus {
  outline: none;
}

/* --------------------------------------------
   Focus Styles
   -------------------------------------------- */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

/* Enhanced focus for interactive elements */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-accent-light);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* High contrast focus ring for buttons */
.nav-cta:focus-visible,
.cta-button:focus-visible {
  outline: 3px solid var(--color-text);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px var(--color-accent-glow);
}

/* --------------------------------------------
   Scrollbar Styles (Webkit)
   -------------------------------------------- */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-deep);
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-surface);
  border-radius: 5px;
  border: 2px solid var(--color-bg-deep);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-subtle);
}

/* ============================================
   Theme System
   ============================================ */

/* --------------------------------------------
   Light Mode
   -------------------------------------------- */
html[data-mode="light"] {
  --color-bg-deep: #ffffff;
  --color-bg: #f8f9fa;
  --color-bg-elevated: #ffffff;
  --color-bg-surface: #f1f3f5;

  --color-text: #1a1e25;
  --color-text-muted: #495057;
  --color-text-subtle: #868e96;

  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-strong: rgba(0, 0, 0, 0.15);

  /* Adjust shadows for light mode */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
}

/* Light mode scrollbar */
html[data-mode="light"] ::-webkit-scrollbar-track {
  background: var(--color-bg);
}

html[data-mode="light"] ::-webkit-scrollbar-thumb {
  background: #ced4da;
  border-color: var(--color-bg);
}

html[data-mode="light"] ::-webkit-scrollbar-thumb:hover {
  background: #adb5bd;
}

/* Light mode header scroll background */
html[data-mode="light"] .site-header {
  background: linear-gradient(to bottom, var(--color-bg-deep), transparent);
}

/* --------------------------------------------
   Steel Blue Accent
   -------------------------------------------- */
html[data-accent="steel"] {
  --color-accent: #3b82f6;
  --color-accent-light: #60a5fa;
  --color-accent-glow: rgba(59, 130, 246, 0.15);
  --color-grid: rgba(59, 130, 246, 0.03);
  --color-grid-strong: rgba(59, 130, 246, 0.06);
}

/* --------------------------------------------
   Mode Toggle Button
   -------------------------------------------- */
.mode-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}

.mode-toggle:hover {
  color: var(--color-text);
  background: var(--color-border);
}

.mode-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

.mode-toggle .icon-sun,
.mode-toggle .icon-moon {
  display: none;
}

/* Show sun icon in dark mode (click to switch to light) */
html[data-mode="dark"] .mode-toggle .icon-sun,
html:not([data-mode]) .mode-toggle .icon-sun {
  display: block;
}

/* Show moon icon in light mode (click to switch to dark) */
html[data-mode="light"] .mode-toggle .icon-moon {
  display: block;
}

/* --------------------------------------------
   Dev-Only Accent Picker
   -------------------------------------------- */
.accent-picker {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  z-index: 1000;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.accent-picker-toggle {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.accent-picker-toggle:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.accent-picker-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-accent);
}

.accent-picker-panel {
  position: absolute;
  bottom: calc(100% + 0.5rem);
  right: 0;
  width: 180px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-md);
  display: none;
}

.accent-picker-panel.open {
  display: block;
}

.accent-picker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.accent-picker-title {
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: var(--tracking-wide);
}

.accent-picker-badge {
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-glow);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
}

.accent-picker-close {
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
}

.accent-picker-close:hover {
  color: var(--color-text);
  background: var(--color-border);
}

.accent-picker-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.accent-option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.accent-option:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.accent-option.active {
  background: var(--color-accent-glow);
  color: var(--color-text);
}

.accent-swatch {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  border: 2px solid transparent;
}

.accent-option.active .accent-swatch {
  border-color: var(--color-bg-elevated);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.accent-swatch-copper {
  background: #d97706;
}

.accent-swatch-steel {
  background: #3b82f6;
}

/* ============================================
   Blog Styles
   ============================================ */

/* Blog Listing Page */
.blog-listing {
  padding: var(--space-3xl) 0;
  min-height: 100vh;
}

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

.post-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.post-item a {
  display: block;
  padding: var(--space-lg);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: border-color var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.post-item a:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.post-item time {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-item h2 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.post-item p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: 1.6;
}

.no-posts {
  color: var(--color-text-muted);
  font-style: italic;
}

/* Blog Post Page */
.blog-post {
  padding-top: var(--space-3xl);
}

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

.post-back {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  text-decoration: none;
  margin-bottom: var(--space-lg);
  transition: color var(--duration-fast) var(--ease-out);
}

.post-back:hover {
  color: var(--color-accent-light);
}

.post-header time {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-header h1 {
  font-size: clamp(var(--text-2xl), 5vw, var(--text-4xl));
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}

.post-description {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
  line-height: 1.6;
}

/* Post Content Typography */
.post-content {
  padding-bottom: var(--space-3xl);
}

.post-content h2 {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.post-content h3 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.post-content h4 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.post-content p {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.post-content ul,
.post-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

.post-content li {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.post-content pre {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  overflow-x: auto;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.post-content p code {
  background: var(--color-bg);
  padding: 0.125em 0.375em;
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

.post-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-md);
  margin: var(--space-lg) 0;
  font-family: var(--font-serif);
  font-style: italic;
}

.post-content blockquote p {
  color: var(--color-text-muted);
}

.post-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--duration-fast) var(--ease-out);
}

.post-content a:hover {
  color: var(--color-accent-light);
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--space-lg) 0;
}