/* =====================================================
   PRO CLEAN CLUB - MODERN DESIGN SYSTEM
   Premium Duct & Chimney Cleaning Services
   ===================================================== */

/* CSS RESET & BASE */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Color Palette - Deep Blues with Warm Orange Accents */
  --primary-900: #0a1628;
  --primary-800: #0f2744;
  --primary-700: #1a3a5c;
  --primary-600: #2d5580;
  --primary-500: #3b6fa3;
  --primary-400: #5a8bc4;
  
  --accent-600: #d14d00;
  --accent-500: #ff6b1a;
  --accent-400: #ff8544;
  --accent-300: #ffa36e;
  
  --neutral-50: #f8f9fa;
  --neutral-100: #e9ecef;
  --neutral-200: #dee2e6;
  --neutral-300: #ced4da;
  --neutral-400: #adb5bd;
  --neutral-500: #6c757d;
  --neutral-600: #495057;
  --neutral-700: #343a40;
  --neutral-800: #212529;
  --neutral-900: #0d1117;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-500) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent-600) 0%, var(--accent-400) 100%);
  --gradient-hero: linear-gradient(135deg, rgba(10, 22, 40, 0.95) 0%, rgba(26, 58, 92, 0.85) 100%);
  
  /* Typography */
  --font-display: 'Outfit', 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
  --radius-xl: 2rem;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.24);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Container Max Width */
  --container-max: 1280px;
  --container-narrow: 960px;
}

/* TYPOGRAPHY */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  color: var(--neutral-700);
  background-color: var(--neutral-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary-900);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 600;
}

p {
  margin-bottom: var(--space-sm);
  max-width: 75ch;
}

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-500);
}

/* LAYOUT UTILITIES */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

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

.section {
  padding: var(--space-2xl) 0;
}

.section-alt {
  background-color: var(--neutral-100);
}

/* HEADER & NAVIGATION */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.98);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  max-width: var(--container-max);
  margin: 0 auto;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary-800);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.logo-highlight {
  color: var(--accent-500);
}

.nav-desktop {
  display: none;
}

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

.nav-link {
  font-weight: 500;
  color: var(--neutral-700);
  transition: all var(--transition-fast);
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width var(--transition-base);
}

.nav-link:hover {
  color: var(--accent-500);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: var(--accent-500);
  font-weight: 600;
}

/* Mobile Menu */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  z-index: 1001;
}

.menu-toggle span {
  width: 28px;
  height: 3px;
  background: var(--primary-800);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

.nav-mobile {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: var(--neutral-50);
  box-shadow: var(--shadow-xl);
  padding: 5rem var(--space-lg) var(--space-lg);
  transition: right var(--transition-slow);
  z-index: 999;
}

.nav-mobile.active {
  right: 0;
}

.nav-mobile .nav-list {
  flex-direction: column;
  gap: 0;
}

.nav-mobile .nav-link {
  display: block;
  padding: var(--space-sm) 0;
  font-size: 1.125rem;
  border-bottom: 1px solid var(--neutral-200);
}

/* Overlay for mobile menu */
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.overlay.active {
  display: block;
  opacity: 1;
}

/* HERO SECTION */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  overflow: hidden;
  margin-top: 70px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 1;
}

.hero-bg {
  position: absolute;
  inset: 0;
  object-fit: cover;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding: var(--space-xl) var(--space-md);
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  color: white;
  font-size: clamp(2.5rem, 6vw, 5rem);
  margin-bottom: var(--space-md);
  text-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-weight: 400;
  color: var(--neutral-100);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 1rem 2rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  background: var(--gradient-accent);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
  color: white;
}

.btn-large {
  padding: 1.25rem 2.5rem;
  font-size: 1.125rem;
}

/* CARDS */
.card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--neutral-200);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: white;
  font-size: 1.75rem;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

/* GRID LAYOUTS */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* TESTIMONIALS */
.testimonial {
  background: white;
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  position: relative;
}

.testimonial::before {
  content: '"';
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  font-size: 4rem;
  color: var(--accent-400);
  opacity: 0.2;
  font-family: Georgia, serif;
  line-height: 1;
}

.testimonial-text {
  font-size: 1.0625rem;
  line-height: 1.7;
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 1;
}

.testimonial-author {
  font-weight: 600;
  color: var(--primary-800);
  font-size: 1rem;
}

.stars {
  color: var(--accent-500);
  margin-bottom: var(--space-sm);
}

/* FORMS */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-weight: 600;
  color: var(--neutral-700);
  margin-bottom: var(--space-xs);
  font-size: 0.9375rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--neutral-300);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-fast);
  background: white;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 111, 163, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  color: #dc2626;
  font-size: 0.875rem;
  margin-top: var(--space-xs);
}

/* ACCORDION (for FAQ) */
.accordion-item {
  background: white;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.accordion-header {
  width: 100%;
  padding: var(--space-md);
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--primary-800);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-fast);
}

.accordion-header:hover {
  background: var(--neutral-50);
}

.accordion-icon {
  font-size: 1.5rem;
  color: var(--accent-500);
  transition: transform var(--transition-base);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.accordion-item.active .accordion-content {
  max-height: 1000px;
}

.accordion-body {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--neutral-600);
  line-height: 1.7;
}

/* FOOTER */
.footer {
  background: var(--primary-900);
  color: var(--neutral-200);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-section h4 {
  color: white;
  margin-bottom: var(--space-md);
  font-size: 1.125rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: var(--neutral-300);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-400);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-md);
  text-align: center;
  color: var(--neutral-400);
  font-size: 0.9375rem;
}

/* BADGES */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--primary-500);
  color: white;
  border-radius: 99px;
  font-size: 0.875rem;
  font-weight: 600;
}

.badge-accent {
  background: var(--gradient-accent);
}

/* TRUST INDICATORS */
.trust-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-xs);
}

.trust-icon {
  font-size: 2rem;
  color: var(--accent-400);
}

.trust-label {
  font-size: 0.875rem;
  color: var(--neutral-300);
}

/* ANIMATIONS */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

/* Scroll-triggered animations */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* RESPONSIVE DESIGN */
@media (min-width: 768px) {
  .nav-desktop {
    display: block;
  }
  
  .menu-toggle {
    display: none;
  }
  
  .hero {
    min-height: 90vh;
  }
}

@media (min-width: 1024px) {
  :root {
    font-size: 18px;
  }
  
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* UTILITY CLASSES */
.text-center { text-align: center; }
.text-white { color: white !important; }
.text-accent { color: var(--accent-500); }
.text-primary { color: var(--primary-700); }

.bg-white { background-color: white; }
.bg-primary { background: var(--gradient-primary); }
.bg-accent { background: var(--gradient-accent); }

.mt-xl { margin-top: var(--space-xl); }
.mb-xl { margin-bottom: var(--space-xl); }
.my-xl { margin-top: var(--space-xl); margin-bottom: var(--space-xl); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-col { flex-direction: column; }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

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

/* Print Styles */
@media print {
  .header, .footer, .nav-mobile, .menu-toggle, .btn { display: none; }
  body { color: black; }
}