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

:root {
  /* Colors */
  --bg-color: #ffffff;
  --bg-secondary: #f4f7f6; /* Very subtle cool gray */
  --text-main: #1e293b;    /* Slate 800 */
  --text-muted: #64748b;   /* Slate 500 */
  
  /* Primary Blues */
  --primary-dark: #0f172a; /* Slate 900 */
  --primary: #1d4ed8;      /* Rich modern blue */
  --primary-light: #eff6ff; /* Blue 50 */
  
  --accent: #2563eb;       /* Vibrant blue for CTAs */
  --accent-hover: #1e40af; 

  /* Layout & Spacing */
  --max-width: 1200px;
  --section-padding: 80px 20px;
  
  /* Typography */
  --font-family: 'Inter', sans-serif;
  
  /* Effects */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 20px 40px -10px rgba(0, 50, 100, 0.05);
  
  --radius-full: 9999px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--text-main);
  background-color: var(--bg-color);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--primary-dark);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-normal);
}

ul, ol {
  list-style: none;
}

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

/* ==========================================================================
   Typography Utilities
   ========================================================================== */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-muted { color: var(--text-muted); }

.h1 { font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: -0.05em; margin-bottom: 24px; }
.h2 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.03em; margin-bottom: 20px; }
.h3 { font-size: 1.5rem; margin-bottom: 16px; }

.lead { font-size: 1.125rem; color: var(--text-muted); margin-bottom: 32px; max-width: 600px; margin-inline: auto; }
.lead-left { margin-inline: 0; max-width: 600px; margin-bottom: 32px; font-size: 1.125rem; color: var(--text-muted); }

/* ==========================================================================
   Layout Containers
   ========================================================================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-padding);
}

.section-bg {
  background-color: var(--bg-secondary);
}

.grid {
  display: grid;
  gap: 32px;
}
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: 16px; }
.gap-8 { gap: 32px; }

/* ==========================================================================
   Components
   ========================================================================== */
/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  gap: 8px;
}

.btn-primary {
  background-color: var(--accent);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.39);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.23);
  color: white;
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-dark);
  border: 1px solid var(--text-muted);
}

.btn-secondary:hover {
  border-color: var(--primary-dark);
  background-color: var(--bg-secondary);
  color: var(--primary-dark);
}

.btn-accent {
  background-color: white;
  color: var(--primary);
  font-weight: 600;
}
.btn-accent:hover {
  background-color: var(--bg-secondary);
  transform: translateY(-2px);
}

/* Header & Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: background var(--transition-normal);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo span:first-child {
  color: var(--primary);
}

.nav {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-link {
  font-weight: 500;
  color: var(--text-main);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary);
  transition: width var(--transition-normal);
}

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

.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary-dark);
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding-top: 160px;
  padding-bottom: 100px;
  background: linear-gradient(135deg, var(--primary-light) 0%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

/* Adding a subtle abstract pattern or glow behind the hero */
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37,99,235,0.08) 0%, rgba(255,255,255,0) 70%);
  z-index: 0;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 32px;
}

/* Cards */
.card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0,0,0,0.05);
  transition: all var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card);
  border-color: var(--primary-light);
}

.card-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 28px;
  margin-bottom: 24px;
  transition: all var(--transition-normal);
}

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

.card-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--primary-dark);
}

.card-desc {
  color: var(--text-muted);
  flex-grow: 1;
}

/* Stats Section */
.stats {
  background-color: var(--primary-dark);
  color: white;
  padding: 60px 0;
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.stat-text {
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.875rem;
  opacity: 0.8;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  text-align: center;
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  margin: 80px auto;
  position: relative;
  overflow: hidden;
}

.cta-section .h2 {
  color: white;
}

/* Form Styles */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--primary-dark);
}

.form-control {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition-normal);
  background-color: var(--bg-secondary);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  background-color: white;
}

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

/* Footer */
.footer {
  background-color: var(--primary-dark);
  color: rgba(255,255,255,0.7);
  padding: 80px 0 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  margin-bottom: 64px;
}

.footer-col h4 {
  color: white;
  font-size: 1.125rem;
  margin-bottom: 24px;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  transition: color var(--transition-normal);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.875rem;
}

/* WhatsApp Float */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  background-color: #25d366;
  color: white;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 32px;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  transition: all var(--transition-normal);
}

.whatsapp-float:hover {
  transform: scale(1.1);
}

/* FAQ Accordion */
.faq-item {
  border-bottom: 1px solid rgba(0,0,0,0.1);
  padding: 24px 0;
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--primary-dark);
  cursor: pointer;
  text-align: left;
}

.faq-icon {
  font-size: 1.5rem;
  transition: transform var(--transition-normal);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
  color: var(--text-muted);
}

.faq-answer-inner {
  padding-top: 16px;
}

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

.faq-item.active .faq-answer {
  max-height: 500px; /* arbitrary max height for transition */
}

/* Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }

/* Responsive Media Queries */
@media (max-width: 992px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 70px;
  }
  
  .nav {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: white;
    flex-direction: column;
    padding: 32px;
    gap: 24px;
    box-shadow: var(--shadow-md);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    z-index: 999;
    border-top: 1px solid rgba(0,0,0,0.05);
  }
  
  .nav.open {
    transform: translateY(0);
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero {
    padding-top: 130px;
    padding-bottom: 80px;
  }
  
  .h1 {
    font-size: 2.5rem;
  }
  
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .stat-item {
    margin-bottom: 32px;
  }
  .stat-item:last-child {
    margin-bottom: 0;
  }
}