/* === CSS VARIABLES === */
:root {
  --primary: #4a6bff;
  --primary-dark: #3a5be0;
  --secondary: #2c3e50;
  --text: #333;
  --text-light: #555;
  --text-muted: #666;
  --bg: #f9f9f9;
  --white: #fff;
  --gradient: linear-gradient(135deg, #f1f5ff 0%, #e6efff 100%);
  --shadow: 0 5px 15px rgba(0,0,0,0.05);
  --shadow-hover: 0 10px 25px rgba(0,0,0,0.1);
  --radius: 10px;
  --transition: all 0.3s ease;
  
  /* Responsive spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 5rem;
  
  /* Font sizes */
  --fs-sm: 0.9rem;
  --fs-base: 1rem;
  --fs-lg: 1.1rem;
  --fs-xl: 1.2rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.75rem;
  --fs-4xl: 2rem;
  --fs-5xl: 2.5rem;
  --fs-6xl: 3rem;
}

/* === RESET & BASE === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Poppins', sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

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

/* === UTILITY CLASSES === */
.text-center { text-align: center; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.w-full { width: 100%; }

/* === COMPONENTS === */

/* Header */
.header {
  background: var(--white);
  box-shadow: var(--shadow);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem var(--space-sm);
  min-height: 60px;
}

.logo {
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--primary);
}

.nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--white);
  box-shadow: var(--shadow);
  flex-direction: column;
  padding: var(--space-sm) 0;
}

.nav.active { display: flex; }

.nav a {
  display: block;
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  padding: 0.75rem var(--space-md);
  transition: var(--transition);
}

.nav a:hover {
  color: var(--primary);
  background: #f8f9ff;
}

.menu-toggle {
  display: block;
  font-size: var(--fs-2xl);
  cursor: pointer;
  background: none;
  border: none;
  color: var(--text);
  transition: var(--transition);
}

.menu-toggle:hover { color: var(--primary); }

/* Hero */
.hero {
  padding: 80px 0 var(--space-xl);
  background: var(--gradient);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-lg);
}

.hero-content {
  width: 100%;
  max-width: 600px;
}

.hero-content h1 {
  font-size: var(--fs-4xl);
  margin-bottom: var(--space-sm);
  line-height: 1.2;
  font-weight: 700;
}

.hero-content h1 span { color: var(--primary); }

.hero-content p {
  font-size: var(--fs-base);
  margin-bottom: var(--space-lg);
  color: var(--text-light);
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
}

.hero-image {
  width: 100%;
  max-width: 400px;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* Sections */
.section {
  padding: var(--space-xl) 0;
}

.section-alt {
  background: var(--white);
}

.section-title {
  text-align: center;
  font-size: var(--fs-3xl);
  margin-bottom: var(--space-lg);
  color: var(--secondary);
  font-weight: 600;
}

/* About */
.about p {
  font-size: var(--fs-base);
  color: var(--text-light);
  line-height: 1.7;
}

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.service-card {
  background: var(--white);
  padding: var(--space-md);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.service-card h3 {
  margin-bottom: var(--space-sm);
  color: var(--primary);
  font-size: var(--fs-xl);
  font-weight: 600;
}

.service-card p {
  color: var(--text-muted);
  line-height: 1.6;
}

/* Testimonials */
.testimonial-slider {
  max-width: 100%;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.testimonial {
  padding: var(--space-md);
  display: none;
  text-align: center;
}

.testimonial.active { display: block; }

.testimonial p {
  font-style: italic;
  margin-bottom: var(--space-sm);
  font-size: var(--fs-base);
  color: var(--text-light);
  line-height: 1.6;
}

.testimonial strong {
  color: var(--primary);
  display: block;
  margin-top: var(--space-xs);
  font-weight: 600;
}

.slider-controls {
  text-align: center;
  margin-top: var(--space-sm);
}

.slider-controls button {
  background: var(--primary);
  color: var(--white);
  border: none;
  padding: var(--space-xs) 0.75rem;
  margin: 0 0.25rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: var(--fs-base);
  transition: var(--transition);
}

.slider-controls button:hover { background: var(--primary-dark); }

/* Contact */
.contact-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.contact-info {
  font-size: var(--fs-base);
}

.contact-info p {
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

.social-links {
  margin-top: var(--space-sm);
}

.social-links a {
  color: var(--primary);
  text-decoration: none;
  margin-right: var(--space-sm);
  display: inline-block;
  transition: var(--transition);
  font-weight: 500;
}

.social-links a:hover { color: var(--primary-dark); }

/* Forms */
.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: var(--space-sm);
  border: 1px solid #ddd;
  border-radius: 8px;
  font-family: 'Poppins', sans-serif;
  font-size: var(--fs-base);
  transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--primary);
}

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

/* Floating Elements */
.whatsapp-float {
  position: fixed;
  width: 50px;
  height: 50px;
  bottom: 20px;
  right: 20px;
  background: #25D366;
  color: var(--white);
  border-radius: 50%;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  z-index: 100;
  transition: var(--transition);
}

.whatsapp-float:hover {
  background: #128C7E;
  transform: scale(1.1);
}

/* Popup */
.popup {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: var(--space-sm);
}

.popup-content {
  background: var(--white);
  padding: var(--space-lg);
  border-radius: var(--radius);
  width: 100%;
  max-width: 400px;
  text-align: center;
  position: relative;
}

.close-btn {
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 24px;
  cursor: pointer;
  color: #aaa;
  transition: var(--transition);
}

.close-btn:hover { color: var(--text); }

.popup-content h3 {
  margin-bottom: var(--space-sm);
  color: var(--secondary);
  font-weight: 600;
}

.popup-content input {
  width: 100%;
  padding: 0.75rem;
  margin: var(--space-sm) 0;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: var(--fs-base);
}

/* Buttons */
.btn {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  padding: 0.75rem var(--space-md);
  border-radius: 25px;
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: var(--fs-base);
  text-align: center;
  min-width: 150px;
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

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

/* Footer */
.footer {
  background: var(--secondary);
  color: var(--white);
  text-align: center;
  padding: var(--space-lg) 0;
  margin-top: var(--space-xl);
}

.footer p {
  font-size: var(--fs-sm);
  line-height: 1.6;
}

/* === RESPONSIVE === */
@media (min-width: 480px) {
  :root {
    --fs-4xl: 2.25rem;
    --fs-base: 1.1rem;
  }
  
  .container { padding: 0 var(--space-md); }
  .hero-buttons { flex-direction: row; justify-content: center; }
  .whatsapp-float { width: 60px; height: 60px; font-size: 30px; }
}

@media (min-width: 768px) {
  :root {
    --space-xl: 4rem;
    --fs-2xl: 1.8rem;
    --fs-3xl: 2rem;
    --fs-4xl: 2.5rem;
    --fs-base: 1.2rem;
  }
  
  .nav {
    display: flex;
    position: static;
    flex-direction: row;
    background: transparent;
    box-shadow: none;
    padding: 0;
  }
  
  .nav a {
    display: inline-block;
    padding: 0;
    margin-left: var(--space-md);
    background: transparent;
  }
  
  .menu-toggle { display: none; }
  
  .hero {
    padding: 100px 0 var(--space-2xl);
  }
  
  .hero .container {
    flex-direction: row;
    text-align: left;
    gap: var(--space-xl);
  }
  
  .hero-content {
    flex: 1;
    max-width: none;
  }
  
  .hero-buttons {
    justify-content: flex-start;
  }
  
  .hero-image {
    flex: 1;
    max-width: 500px;
  }
  
  .about p {
    font-size: var(--fs-lg);
    max-width: 800px;
    margin: 0 auto;
  }
  
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }
  
  .service-card { padding: var(--space-lg); }
  .testimonial { padding: var(--space-lg); }
  .testimonial p { font-size: var(--fs-lg); }
  
  .contact-content {
    flex-direction: row;
    gap: var(--space-xl);
  }
  
  .contact-info,
  .contact-form {
    flex: 1;
  }
}

@media (min-width: 1024px) {
  .container { padding: 0 var(--space-lg); }
  .hero .container { gap: var(--space-2xl); }
  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .testimonial-slider { max-width: 800px; }
}

@media (min-width: 1200px) {
  :root {
    --space-xl: 5rem;
    --fs-4xl: 3rem;
    --fs-base: 1.3rem;
  }
}

@media (min-width: 1440px) {
  .container { max-width: 1400px; }
}

@media (max-width: 320px) {
  :root {
    --fs-4xl: 1.75rem;
    --fs-sm: 0.9rem;
  }
  
  .btn {
    min-width: 120px;
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--fs-sm);
  }
  
  .whatsapp-float {
    width: 45px;
    height: 45px;
    font-size: 20px;
    bottom: 15px;
    right: 15px;
  }
}