/* ========================================
   NEXATECH - AI & Automation Experts
   Responsive CSS Framework
   ======================================== */

/* --- CSS Variables & Reset --- */
:root {
  --color-primary: #00b894;
  --color-primary-dark: #00a884;
  --color-primary-light: #55efc4;
  --color-secondary: #2d3436;
  --color-accent: #e17055;
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #2d3436;
  --color-text-muted: #636e72;
  --color-border: #dfe6e9;
  --color-error: #d63031;
  --color-success: #00b894;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  --container-max: 1200px;
  --header-height: 72px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 48px rgba(0,0,0,0.16);

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;

  --ease-smooth: cubic-bezier(.16, 1, .3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-secondary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h4 { font-size: clamp(1rem, 2vw, 1.25rem); }

p { color: var(--color-text-muted); font-size: 1rem; }

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

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

/* Anchor links land below the fixed header instead of behind it */
section[id] { scroll-margin-top: var(--header-height); }

::selection {
  background: var(--color-primary);
  color: #fff;
}

html { scrollbar-color: var(--color-border) var(--color-bg); scrollbar-width: thin; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }

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

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -60%;
  width: 40%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,.35), transparent);
  transform: skewX(-20deg);
  transition: left .6s var(--ease-smooth);
}
.btn:hover::after { left: 130%; }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md), 0 8px 20px -8px color-mix(in srgb, var(--color-primary) 60%, transparent);
}

.btn-secondary {
  background: transparent;
  color: var(--color-secondary);
  border: 2px solid var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-secondary);
  background: var(--color-secondary);
  color: #fff;
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}
.btn-accent:hover {
  background: #d05d44;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md), 0 8px 20px -8px color-mix(in srgb, var(--color-accent) 60%, transparent);
}

.btn-lg { padding: var(--spacing-lg) var(--spacing-2xl); font-size: 1.125rem; }
.btn-sm { padding: var(--spacing-sm) var(--spacing-md); font-size: 0.875rem; }

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition-normal);
}

.header.scrolled {
  box-shadow: var(--shadow-sm), 0 8px 30px -22px color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-secondary);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), #00cec9);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.25rem;
}

.logo-img { transition: transform var(--transition-normal); }
.logo:hover .logo-img { transform: rotate(-8deg) scale(1.08); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  color: var(--color-text);
  padding: var(--spacing-sm) 0;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-normal);
}
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}
.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--color-secondary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.mobile-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(35% 35% at 15% 25%, color-mix(in srgb, var(--color-primary) 22%, transparent), transparent 70%),
    radial-gradient(30% 30% at 85% 15%, color-mix(in srgb, var(--color-accent) 16%, transparent), transparent 70%),
    radial-gradient(40% 40% at 55% 90%, color-mix(in srgb, var(--color-primary-light) 18%, transparent), transparent 70%);
  filter: blur(60px);
  animation: auroraDrift 22s var(--ease-smooth) infinite alternate;
  pointer-events: none;
}

@keyframes auroraDrift {
  0%   { transform: translate(0, 0) rotate(0deg) scale(1); }
  50%  { transform: translate(-3%, 2%) rotate(6deg) scale(1.08); }
  100% { transform: translate(2%, -3%) rotate(-4deg) scale(1.03); }
}

.hero-gradient-text {
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light) 50%, var(--color-primary));
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmerText 6s ease-in-out infinite;
}

@keyframes shimmerText {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(0, 184, 148, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 0.6s ease;
}

.hero h1 {
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  max-width: 500px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
  animation: fadeInUp 0.6s ease 0.4s both;
}

.stat-item { text-align: center; }
.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

.hero-visual {
  position: relative;
  animation: fadeInRight 0.8s ease 0.2s both;
}

.hero-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-xl);
  border: 1px solid var(--color-border);
}

.hero-card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.hero-card-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), #00cec9);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
}

.hero-card-title { font-weight: 600; }
.hero-card-subtitle { font-size: 0.875rem; color: var(--color-text-muted); }

.hero-card-content { display: flex; flex-direction: column; gap: var(--spacing-md); }

.feature-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}
.feature-row:hover { background: var(--color-border); transform: translateX(4px); }

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.feature-text strong { display: block; color: var(--color-secondary); }
.feature-text span { font-size: 0.875rem; color: var(--color-text-muted); }

/* --- Section Styles --- */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-3xl);
}

.section-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(0, 184, 148, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-md);
}

.section-header h2 { margin-bottom: var(--spacing-md); }
.section-header p { font-size: 1.125rem; }

/* --- Services Grid --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), #00cec9);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), 0 24px 48px -28px color-mix(in srgb, var(--color-primary) 45%, transparent);
  border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), #00cec9);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  transition: transform var(--transition-normal);
}
.service-card:hover .service-icon { transform: scale(1.08) rotate(-4deg); }

.service-card h3 { margin-bottom: var(--spacing-md); }
.service-card p { margin-bottom: var(--spacing-lg); }

.service-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.service-features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}
.service-features li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 700;
}

/* --- Tech Stack --- */
.tech-stack {
  background: var(--color-secondary);
  color: #fff;
}

.tech-stack .section-badge { background: rgba(255,255,255,0.1); color: var(--color-primary-light); }
.tech-stack h2 { color: #fff; }
.tech-stack p { color: rgba(255,255,255,0.7); }

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--spacing-lg);
  align-items: center;
}

.tech-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
}
.tech-item:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.tech-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: background var(--transition-normal);
}
.tech-item:hover .tech-icon { background: color-mix(in srgb, var(--color-primary) 25%, transparent); }
.tech-item svg { width: 32px; height: 32px; transition: transform var(--transition-normal); }
.tech-item:hover svg { transform: scale(1.1); }

.tech-item span { font-size: 0.875rem; font-weight: 500; }

/* --- Process / How it Works --- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 50%;
  right: 50%;
  height: 2px;
  background: var(--color-border);
  z-index: 0;
}

.process-step {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
}

.step-number {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 4px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
  position: relative;
}

.step-number::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 100%;
  width: calc(50% - 40px);
  height: 2px;
  background: var(--color-border);
  transform: translateY(-50%);
}
.process-step:last-child .step-number::after { display: none; }

.process-step:hover .step-number {
  transform: scale(1.08);
  transition: transform var(--transition-normal);
}
.process-step:hover .step-number::before {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--color-primary) 45%, transparent);
  animation: ringPulse 1.2s var(--ease-smooth) infinite;
}

@keyframes ringPulse {
  0%   { opacity: .8; transform: scale(.9); }
  100% { opacity: 0; transform: scale(1.4); }
}

.process-step h3 { margin-bottom: var(--spacing-md); }
.process-step p { color: var(--color-text-muted); }

/* --- Testimonials / Case Studies --- */
.case-study-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--spacing-lg);
}

.case-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
}
.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), 0 24px 48px -28px color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.case-image {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--color-primary), #00cec9);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 3rem;
  animation: gentleFloat 4s ease-in-out infinite;
}
.case-card:nth-child(2) .case-image { animation-delay: .3s; }
.case-card:nth-child(3) .case-image { animation-delay: .6s; }

@keyframes gentleFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.case-content { padding: var(--spacing-lg); }
.case-tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(0, 184, 148, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}
.case-content h3 { margin-bottom: var(--spacing-sm); }
.case-content p { margin-bottom: var(--spacing-lg); font-size: 0.9375rem; }
.case-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* --- CTA Section --- */
.cta {
  background: linear-gradient(135deg, var(--color-secondary), #1a1a2e);
  color: #fff;
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin: var(--spacing-2xl) 0;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 60%;
  height: 120%;
  background: radial-gradient(ellipse, rgba(0, 184, 148, 0.15) 0%, transparent 70%);
}

.cta h2 { color: #fff; margin-bottom: var(--spacing-md); }
.cta p { color: rgba(255,255,255,0.7); margin-bottom: var(--spacing-xl); max-width: 600px; margin-left: auto; margin-right: auto; }

.cta .btn-primary { background: var(--color-primary); }
.cta .btn-primary:hover { background: var(--color-primary-light); color: var(--color-secondary); }
.cta .btn-secondary { border-color: rgba(255,255,255,0.3); color: #fff; }
.cta .btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

/* --- Footer --- */
.footer {
  background: var(--color-secondary);
  color: #fff;
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

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

.footer-brand .logo { color: #fff; margin-bottom: var(--spacing-md); }
.footer-brand p { color: rgba(255,255,255,0.6); max-width: 300px; }

.footer-column h4 { color: #fff; margin-bottom: var(--spacing-md); font-size: 1rem; }
.footer-column ul { list-style: none; display: flex; flex-direction: column; gap: var(--spacing-sm); }
.footer-column a { color: rgba(255,255,255,0.6); transition: var(--transition-fast); }
.footer-column a:hover { color: var(--color-primary-light); }

.footer-bottom {
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
}

.footer-links { display: flex; gap: var(--spacing-lg); }
.footer-links a { color: rgba(255,255,255,0.5); }
.footer-links a:hover { color: var(--color-primary-light); }

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: var(--reveal-delay, 0ms);
}
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }

/* --- Responsive Breakpoints --- */
@media (max-width: 1024px) {
  .hero-content { gap: var(--spacing-2xl); }
  .hero-stats { grid-template-columns: 1fr; gap: var(--spacing-md); text-align: left; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --header-height: 64px; }

  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-md);
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .mobile-menu-btn { display: flex; }

  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-subtitle { max-width: 100%; }
  .hero-stats { text-align: center; }
  .hero-card { padding: var(--spacing-lg); }

  .process-steps::before { display: none; }
  .step-number::after { display: none; }

  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-brand p { margin: 0 auto; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  :root { --spacing-3xl: 2.5rem; --spacing-2xl: 2rem; }
  .btn { width: 100%; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
}

/* --- Utility Classes --- */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mt-3 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-xl); }
.d-flex { display: flex; }
.gap-1 { gap: var(--spacing-md); }
.gap-2 { gap: var(--spacing-lg); }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.flex-wrap { flex-wrap: wrap; }

/* --- Scroll Progress Bar --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  z-index: 1100;
  transition: width 0.1s linear;
}

/* --- Focus States for Accessibility --- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 20%, transparent);
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}