/* CodeRush - Professional Consulting Website */

:root {
  --color-primary: #0f172a;
  --color-secondary: #1e293b;
  --color-accent: #3b82f6;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-muted: #94a3b8;
  --color-bg: #ffffff;
  --color-bg-alt: #f1f5f9;
  --color-bg-dark: #0f172a;
  --color-border: #e2e8f0;
  --color-card: #ffffff;
  --color-card-alt: #f8fafc;
  --gradient-text: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #06b6d4 100%);
  --font-main: 'Inter', -apple-system, sans-serif;
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 8px 30px rgba(15, 23, 42, 0.12);
  --radius: 8px;
  --radius-lg: 12px;
  --max-width: 1200px;
}

[data-theme="dark"] {
  --color-primary: #f8fafc;
  --color-secondary: #e2e8f0;
  --color-text: #f1f5f9;
  --color-text-light: #94a3b8;
  --color-text-muted: #64748b;
  --color-bg: #020617;
  --color-bg-alt: #0f172a;
  --color-bg-dark: #020617;
  --color-border: #334155;
  --color-card: #1e293b;
  --color-card-alt: #0f172a;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-primary: #f8fafc;
    --color-secondary: #e2e8f0;
    --color-text: #f1f5f9;
    --color-text-light: #94a3b8;
    --color-text-muted: #64748b;
    --color-bg: #020617;
    --color-bg-alt: #0f172a;
    --color-bg-dark: #020617;
    --color-border: #334155;
    --color-card: #1e293b;
    --color-card-alt: #0f172a;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
h1, h2, h3 { color: var(--color-primary); line-height: 1.2; font-weight: 700; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.25rem; font-weight: 600; }
p { color: var(--color-text-light); }

/* Skip link - pushed further off screen */
.skip-link {
  position: absolute; top: -100px; left: 0; background: var(--color-accent);
  color: white; padding: 8px 16px; z-index: 1000; text-decoration: none;
}
.skip-link:focus { top: 0; }

/* Buttons */
.btn {
  display: inline-block; padding: 14px 28px; font-size: 1rem; font-weight: 600;
  text-decoration: none; border-radius: var(--radius); border: none; cursor: pointer;
  min-width: 180px; text-align: center; transition: all 0.2s;
}
.btn-primary { background: var(--color-accent); color: #fff !important; }
.btn-primary:hover { background: #2563eb; transform: translateY(-2px); }
.btn-secondary { background: transparent; color: var(--color-primary); border: 2px solid var(--color-border); }
.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn-small { padding: 10px 20px; font-size: 0.9rem; min-width: auto; }
.btn-full { width: 100%; }

/* Header */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: var(--color-bg); border-bottom: 1px solid var(--color-border);
}
.header .container { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.logo { display: flex; align-items: center; text-decoration: none; }
.logo img { height: 36px; width: auto; }

/* Header logo switching for dark mode */
.logo .logo-dark { display: none; }
[data-theme="dark"] .logo .logo-light { display: none; }
[data-theme="dark"] .logo .logo-dark { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .logo .logo-light { display: none; }
  :root:not([data-theme="light"]) .logo .logo-dark { display: block; }
}

.nav { display: flex; align-items: center; gap: 24px; }
.nav a { color: var(--color-text); text-decoration: none; font-weight: 500; }
.nav a:hover { color: var(--color-accent); }
/* Animated Theme Toggle Switch */
.theme-switch {
  position: relative;
  display: inline-block;
  width: 56px;
  height: 28px;
  cursor: pointer;
}
.theme-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.switch-slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 28px;
  transition: background 0.4s ease;
  overflow: hidden;
}
.switch-slider::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  left: 3px;
  bottom: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.4s cubic-bezier(0.68, -0.15, 0.32, 1.15);
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.switch-icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  transition: opacity 0.3s, transform 0.3s;
}
.switch-icon svg {
  width: 100%;
  height: 100%;
}
.switch-icon.sun {
  left: 6px;
  color: #fbbf24;
  opacity: 1;
}
.switch-icon.moon {
  right: 6px;
  color: #f8fafc;
  opacity: 0.5;
}

/* Dark mode active state */
[data-theme="dark"] .switch-slider {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}
[data-theme="dark"] .switch-slider::before {
  transform: translateX(28px);
  background: #334155;
}
[data-theme="dark"] .switch-icon.sun {
  opacity: 0.5;
}
[data-theme="dark"] .switch-icon.moon {
  opacity: 1;
  color: #fbbf24;
}

/* System preference dark mode */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .switch-slider {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  }
  :root:not([data-theme="light"]) .switch-slider::before {
    transform: translateX(28px);
    background: #334155;
  }
  :root:not([data-theme="light"]) .switch-icon.sun {
    opacity: 0.5;
  }
  :root:not([data-theme="light"]) .switch-icon.moon {
    opacity: 1;
    color: #fbbf24;
  }
}

/* Hero */
.hero { 
  position: relative; 
  padding: 180px 0 100px; 
  background: var(--color-bg); 
  text-align: center; 
  overflow: hidden;
}
.hero .container {
  position: relative;
  z-index: 2;
}
.hero-content { 
  position: relative; 
  max-width: 800px; 
  margin: 0 auto; 
}
.hero-title {
  position: relative;
  z-index: 2;
  font-size: clamp(2.5rem, 8vw, 4.5rem); font-weight: 800;
  letter-spacing: -0.03em; margin-bottom: 32px;
}
.gradient-text {
  display: block;
  background: var(--gradient-text); background-size: 200% 200%;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; animation: gradientShift 8s ease infinite;
}
@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.hero-subtitle { font-size: 1.25rem; margin-bottom: 48px; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-cta { display: flex; gap: 16px; justify-content: center; }

/* Full-width parallax background */
.hero-parallax-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  padding: 20px 0;
  perspective: 1000px;
  overflow: hidden;
}
.parallax-row {
  display: flex;
  justify-content: space-around;
  align-items: center;
  width: 100%;
  padding: 0 40px;
  transition: transform 0.1s ease-out;
  transform-style: preserve-3d;
  will-change: transform;
}
.parallax-row img { 
  height: 48px; 
  width: auto; 
  opacity: 0.05;
  /* Light mode: black silhouettes */
  filter: grayscale(1) brightness(0);
  transition: all 0.3s ease;
  cursor: pointer;
  pointer-events: auto;
}
.parallax-row img:hover {
  opacity: 1 !important;
  filter: none !important;
  transform: scale(1.3);
}
[data-theme="dark"] .parallax-row img { 
  /* Dark mode: white silhouettes */
  filter: grayscale(1) brightness(0) invert(1); 
  opacity: 0.05;
}
[data-theme="dark"] .parallax-row img:hover {
  opacity: 1 !important;
  filter: none !important;
  transform: scale(1.3);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .parallax-row img { 
    filter: grayscale(1) brightness(0) invert(1); 
    opacity: 0.05;
  }
  :root:not([data-theme="light"]) .parallax-row img:hover {
    opacity: 1 !important;
    filter: none !important;
    transform: scale(1.3);
  }
}

/* Trust Strip */
.trust-strip { padding: 60px 0; background: var(--color-bg-dark); }
.trust-items { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; text-align: center; }
.trust-number { display: block; font-size: 2.75rem; font-weight: 800; color: white; }
.trust-label { display: block; font-size: 0.9rem; color: #94a3b8; margin-top: 8px; }

/* Stacks Section - Carousel */
.stacks-section { padding: 80px 0; background: var(--color-bg); }
.section-header { text-align: center; max-width: 600px; margin: 0 auto 48px; }
.section-header h2 { margin-bottom: 16px; }

/* Carousel navigation */
.stacks-carousel { max-width: 900px; margin: 0 auto; }
.carousel-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}
.carousel-btn {
  padding: 12px 24px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.2s;
}
.carousel-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.carousel-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
}

/* Carousel content */
.carousel-content {
  position: relative;
  min-height: 200px;
}
.stack-logos {
  display: none;
  animation: fadeIn 0.3s ease;
}
.stack-logos.active {
  display: block;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Logo grid inside carousel */
.logo-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  padding: 24px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.logo-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  padding: 12px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  transition: all 0.2s;
  cursor: pointer;
}
.logo-item:hover {
  transform: scale(1.1);
  background: var(--color-accent);
}
.logo-item:hover img {
  filter: brightness(0) invert(1);
}
.logo-item img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  /* Light mode: black/grayscale icons */
  filter: grayscale(1) brightness(0.2);
  transition: filter 0.2s;
}

/* Tooltip for tool names */
.logo-item::after {
  content: attr(data-name);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 12px;
  background: var(--color-primary);
  color: var(--color-bg);
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
  border-radius: 4px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
  pointer-events: none;
  z-index: 10;
}
.logo-item::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--color-primary);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
  pointer-events: none;
  z-index: 10;
}
.logo-item:hover::after,
.logo-item:hover::before,
.logo-item.show-tooltip::after,
.logo-item.show-tooltip::before {
  opacity: 1;
  visibility: visible;
}

/* Dark mode: white icons */
[data-theme="dark"] .logo-item img { 
  filter: grayscale(1) brightness(0) invert(1); 
  opacity: 0.9; 
}
[data-theme="dark"] .logo-item:hover img {
  filter: brightness(0) invert(1);
}
[data-theme="dark"] .logo-item::after {
  background: #f8fafc;
  color: #0f172a;
}
[data-theme="dark"] .logo-item::before {
  border-top-color: #f8fafc;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .logo-item img { 
    filter: grayscale(1) brightness(0) invert(1); 
    opacity: 0.9; 
  }
  :root:not([data-theme="light"]) .logo-item:hover img {
    filter: brightness(0) invert(1);
  }
  :root:not([data-theme="light"]) .logo-item::after {
    background: #f8fafc;
    color: #0f172a;
  }
  :root:not([data-theme="light"]) .logo-item::before {
    border-top-color: #f8fafc;
  }
}

.stack-note {
  text-align: center;
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.stacks-footer {
  text-align: center;
  margin-top: 32px;
  color: var(--color-text-muted);
}

/* Services */
.services { padding: 100px 0; background: var(--color-bg-alt); }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
  padding: 32px; background: var(--color-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); transition: all 0.3s;
}
.service-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--color-accent); }
.service-icon { font-size: 2rem; margin-bottom: 16px; }
.service-card h3 { margin-bottom: 12px; }

/* Process */
.process { padding: 100px 0; background: var(--color-secondary); }
[data-theme="dark"] .process { background: #0f172a; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .process { background: #0f172a; } }
.process .section-header h2, .process .section-header p { color: white; }
.process .section-header p { color: #94a3b8; }
.process-steps { max-width: 700px; margin: 0 auto; list-style: none; }
.process-step { display: flex; gap: 32px; padding: 32px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }
.process-step:last-child { border-bottom: none; }
.step-number {
  font-size: 1.5rem; font-weight: 700; color: var(--color-accent);
  width: 48px; height: 48px; background: rgba(59,130,246,0.2);
  border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.step-content h3 { color: white; margin-bottom: 8px; }
.step-content p { color: #94a3b8; }

/* Differentiation */
.differentiation { padding: 100px 0; background: var(--color-bg); }
.diff-content { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.diff-text h2 { margin-bottom: 32px; }
.diff-list { list-style: none; }
.diff-list li { padding: 16px 0; border-bottom: 1px solid var(--color-border); color: var(--color-text-light); }
.diff-list li:last-child { border-bottom: none; }
.diff-list strong { color: var(--color-primary); }
.diff-image img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

/* Contact - Fixed dark mode colors */
.contact { padding: 100px 0; background: var(--color-bg-alt); }
[data-theme="dark"] .contact { background: #0f172a; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .contact { background: #0f172a; } }

.contact-wrapper { display: grid; grid-template-columns: 1fr 1.5fr; gap: 80px; }
.contact-info h2 { margin-bottom: 16px; }
.contact-info > p { margin-bottom: 32px; }
.contact-details { 
  padding: 24px; 
  background: var(--color-card); 
  border-radius: var(--radius); 
  border: 1px solid var(--color-border); 
}
.contact-details p { margin-bottom: 8px; font-size: 0.95rem; }
.contact-details p:last-child { margin-bottom: 0; }

.contact-form {
  background: var(--color-card); 
  padding: 32px; 
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md); 
  border: 1px solid var(--color-border);
}
/* Dark mode form differentiation */
[data-theme="dark"] .contact-form {
  background: #1e293b;
  border-color: #475569;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .contact-form {
    background: #1e293b;
    border-color: #475569;
  }
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 14px; font-size: 1rem; font-family: inherit;
  border: 1px solid var(--color-border); border-radius: var(--radius);
  background: var(--color-bg); color: var(--color-text);
}
.form-group select {
  padding-right: 36px;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
}
/* Dark mode form inputs */
[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group select,
[data-theme="dark"] .form-group textarea {
  background: #0f172a;
  border-color: #475569;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .form-group input,
  :root:not([data-theme="light"]) .form-group select,
  :root:not([data-theme="light"]) .form-group textarea {
    background: #0f172a;
    border-color: #475569;
  }
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-status { margin-top: 16px; padding: 12px; border-radius: var(--radius); text-align: center; display: none; }
.form-status.success { display: block; background: #dcfce7; color: #166534; }
.form-status.error { display: block; background: #fef2f2; color: #dc2626; }
.form-status.loading { display: block; background: var(--color-bg-alt); color: var(--color-text-light); }

/* Footer */
.footer { padding: 80px 0 40px; background: var(--color-bg-dark); color: white; }
.footer-content { display: flex; justify-content: space-between; align-items: center; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-brand .logo { display: block; margin-bottom: 16px; }

/* Footer logo */
.footer .logo img { 
  display: block;
}

.footer-brand p { color: #94a3b8; }
.footer-cta p { color: #94a3b8; margin-bottom: 16px; }
.footer-bottom { padding-top: 40px; text-align: center; }
.footer-bottom p { color: rgba(255,255,255,0.4); font-size: 0.9rem; }

/* Responsive */
@media (max-width: 768px) {
  h2 { font-size: 1.75rem; }
  .nav a:not(.btn) { display: none; }
  .hero { padding: 140px 0 60px; }
  .hero-cta { flex-direction: column; align-items: center; max-width: 300px; margin: 0 auto; }
  .hero-cta .btn { width: 100%; }
  .trust-items { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .trust-number { font-size: 2rem; }
  .services-grid { grid-template-columns: 1fr; }
  .process-step { flex-direction: column; gap: 16px; text-align: center; }
  .step-number { margin: 0 auto; }
  .diff-content { grid-template-columns: 1fr; }
  .diff-image { order: -1; }
  .contact-wrapper { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-content { flex-direction: column; text-align: center; gap: 32px; }
  .footer-brand .logo { justify-content: center; }
  .footer-brand .logo img { margin: 0 auto; }
  .parallax-row { padding: 0 16px; }
  .parallax-row img { height: 28px; }
  .carousel-nav { gap: 6px; }
  .carousel-btn { padding: 8px 16px; font-size: 0.85rem; }
}

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