/* ============================================
   Revolution Power - Main Stylesheet
   ============================================ */

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Colors */
  --color-primary: #002147;
  --color-secondary: #ff9900;
  --color-accent: #ffa500;
  --color-white: #ffffff;
  --color-light-gray: #f5f5f5;
  --color-medium-gray: #e0e0e0;
  --color-dark-gray: #333333;
  --color-text: #2c3e50;
  --color-text-light: #6c757d;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, #003d7a 100%);
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
  --gradient-overlay: linear-gradient(rgba(0, 33, 71, 0.85), rgba(0, 33, 71, 0.7));
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Outfit', 'Inter', sans-serif;
  
  /* Font Sizes */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.875rem;
  --fs-4xl: 2.25rem;
  --fs-5xl: 3rem;
  --fs-6xl: 3.75rem;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

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

body {
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
  overflow-x: hidden;
}

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

h1 { font-size: var(--fs-5xl); }
h2 { font-size: var(--fs-4xl); }
h3 { font-size: var(--fs-3xl); }
h4 { font-size: var(--fs-2xl); }
h5 { font-size: var(--fs-xl); }
h6 { font-size: var(--fs-lg); }

p {
  margin-bottom: var(--space-sm);
  color: var(--color-text-light);
}

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

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

ul, ol {
  list-style: none;
}

/* ============================================
   Layout Components
   ============================================ */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--space-md);
}

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

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

.section-lg {
  padding: 5rem 0;
}

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

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.flex-column {
  display: flex;
  flex-direction: column;
}

/* ============================================
   Header & Navigation
   ============================================ */

.header {
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
}

.header-top {
  background: var(--gradient-primary);
  color: var(--color-white);
  padding: var(--space-xs) 0;
  font-size: var(--fs-sm);
}

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

.header-contact a {
  color: var(--color-white);
  margin-right: var(--space-md);
  transition: opacity var(--transition-fast);
}

.header-contact a:hover {
  opacity: 0.8;
}

.header-social a {
  color: var(--color-white);
  margin-left: var(--space-sm);
  font-size: var(--fs-lg);
  transition: transform var(--transition-fast);
  display: inline-block;
}

.header-social a:hover {
  transform: translateY(-2px);
}

.header-main {
  padding: var(--space-md) 0;
}

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

.logo {
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo img {
  height: 50px;
  width: auto;
}

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

.nav-menu a {
  color: var(--color-primary);
  font-weight: 500;
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-base);
}

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

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

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

/* Dropdown Menu */
.nav-item {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-white);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: var(--space-sm);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.dropdown-menu a:hover {
  background: var(--color-light-gray);
  color: var(--color-secondary);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--fs-2xl);
  color: var(--color-primary);
  cursor: pointer;
  padding: var(--space-xs);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--fs-base);
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-base);
  text-decoration: none;
  font-family: var(--font-primary);
}

.btn-primary {
  background: var(--gradient-secondary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

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

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

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

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--fs-lg);
}

.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--fs-sm);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background: var(--gradient-primary);
  overflow: hidden;
}

.hero-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity var(--transition-slow);
  background-size: cover;
  background-position: center;
}

.hero-slide.active {
  opacity: 1;
}

.hero-slide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-overlay);
}

.hero-content {
  position: relative;
  z-index: 10;
  color: var(--color-white);
  max-width: 700px;
}

.hero-content h1 {
  color: var(--color-white);
  font-size: var(--fs-6xl);
  margin-bottom: var(--space-lg);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-content p {
  font-size: var(--fs-xl);
  color: var(--color-white);
  margin-bottom: var(--space-xl);
  opacity: 0.95;
}

/* ============================================
   Cards
   ============================================ */

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  height: 100%;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  background: var(--color-light-gray);
}

.card-body {
  padding: var(--space-lg);
}

.card-title {
  font-size: var(--fs-2xl);
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.card-text {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-secondary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-3xl);
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

/* Service Cards with Hover Effect */
.service-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition-base);
  border: 2px solid var(--color-medium-gray);
}

.service-card:hover {
  background: var(--gradient-primary);
  border-color: var(--color-primary);
  transform: translateY(-10px);
}

.service-card:hover .card-title,
.service-card:hover .card-text {
  color: var(--color-white);
}

.service-card:hover .card-icon {
  background: var(--color-white);
  color: var(--color-secondary);
}

/* ============================================
   Process Steps
   ============================================ */

.process-steps {
  background: var(--color-light-gray);
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 80px;
  height: 80px;
  background: var(--gradient-secondary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-3xl);
  font-weight: 700;
  color: var(--color-white);
  margin: 0 auto var(--space-md);
  box-shadow: var(--shadow-lg);
}

.step-title {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-sm);
}

.step-description {
  color: var(--color-text-light);
}

/* ============================================
   Statistics Counter
   ============================================ */

.stats-section {
  background: var(--gradient-primary);
  color: var(--color-white);
  text-align: center;
}

.stat-item {
  padding: var(--space-lg);
}

.stat-number {
  font-size: var(--fs-5xl);
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: var(--space-sm);
  display: block;
}

.stat-label {
  font-size: var(--fs-lg);
  color: var(--color-white);
  opacity: 0.9;
}

/* ============================================
   CTA Banner
   ============================================ */

.cta-banner {
  background: var(--gradient-secondary);
  color: var(--color-white);
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

.cta-banner h2 {
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.cta-banner p {
  color: var(--color-white);
  font-size: var(--fs-xl);
  margin-bottom: var(--space-xl);
  opacity: 0.95;
}

/* ============================================
   Forms
   ============================================ */

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

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 500;
  color: var(--color-primary);
}

.form-control {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--fs-base);
  font-family: var(--font-primary);
  border: 2px solid var(--color-medium-gray);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  background: var(--color-white);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(255, 153, 0, 0.1);
}

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

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-3xl) 0 var(--space-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-section h3 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
  font-size: var(--fs-xl);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--fs-sm);
  line-height: 1.8;
}

.footer-section a:hover {
  color: var(--color-secondary);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-md);
  text-align: center;
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   Modal/Popup
   ============================================ */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  max-width: 500px;
  width: 90%;
  position: relative;
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  font-size: var(--fs-3xl);
  color: var(--color-text-light);
  cursor: pointer;
  transition: color var(--transition-fast);
  line-height: 1;
}

.modal-close:hover {
  color: var(--color-primary);
}

.modal-title {
  margin-bottom: var(--space-lg);
  color: var(--color-primary);
}

/* ============================================
   Floating Action Buttons
   ============================================ */

.floating-btn {
  position: fixed;
  bottom: var(--space-lg);
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-2xl);
  color: var(--color-white);
  box-shadow: var(--shadow-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  z-index: var(--z-fixed);
  border: none;
}

.floating-btn:hover {
  transform: scale(1.1);
}

.whatsapp-btn {
  left: var(--space-lg);
  background: #25D366;
}

.scroll-top-btn {
  right: var(--space-lg);
  background: var(--gradient-secondary);
  opacity: 0;
  visibility: hidden;
}

.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
  :root {
    --fs-6xl: 2.5rem;
    --fs-5xl: 2rem;
    --fs-4xl: 1.75rem;
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding-left: var(--space-md);
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .hero-content h1 {
    font-size: var(--fs-4xl);
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
}

@media (max-width: 480px) {
  :root {
    --space-3xl: 3rem;
    --space-2xl: 2rem;
  }
  
  .btn {
    width: 100%;
  }
  
  .floating-btn {
    width: 50px;
    height: 50px;
    font-size: var(--fs-xl);
  }
  
  .whatsapp-btn {
    left: var(--space-sm);
  }
  
  .scroll-top-btn {
    right: var(--space-sm);
  }
}

/* ============================================
   Utility Classes
   ============================================ */

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

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-white { color: var(--color-white); }

.bg-primary { background: var(--color-primary); }
.bg-secondary { background: var(--color-secondary); }
.bg-light { background: var(--color-light-gray); }
.bg-white { background: var(--color-white); }

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

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