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

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: #1f2937;
  overflow-x: hidden;
}

/* Container */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */

nav {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 1rem 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

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

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: white;
  text-decoration: none;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.3s;
}

.nav-links a:hover {
  opacity: 0.8;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */

.hero {
  background: linear-gradient(135deg, #f8f9ff 0%, #e2e8f0 100%);
  padding: 140px 0 100px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  color: #6b7280;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */

.btn {
  padding: 1.1rem 2.2rem;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
  background: white;
  color: #667eea;
  border: 2px solid #667eea;
}

.btn-secondary:hover {
  background: #667eea;
  color: white;
  transform: translateY(-4px);
}

.btn-large {
  padding: 1.3rem 3rem !important;
  font-size: 1.2rem !important;
}

/* Sections */

.section {
  padding: 90px 0;
}

.section-title {
  text-align: center;
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 4rem;
  color: #1f2937;
}

/* Audience Tabs */

.audience-tabs {
  background: white;
  padding: 70px 0;
}

.tabs-header {
  display: flex;
  justify-content: center;
  margin-bottom: 4rem;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 1.1rem 2.5rem;
  border: none;
  background: #f8f9ff;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s;
  white-space: nowrap;
}

.tab-btn.active, .tab-btn:hover {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  transform: translateY(-2px);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.cta-section {
  text-align: center;
  margin-top: 4rem;
}

/* Features Grid */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  margin-top: 2rem;
}

.feature-card {
  background: white;
  padding: 3rem 2.5rem;
  border-radius: 24px;
  box-shadow: 0 10px 50px rgba(0,0,0,0.08);
  text-align: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-top: 5px solid transparent;
}

.feature-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 30px 80px rgba(0,0,0,0.15);
}

.feature-card.publisher {
  border-top-color: #667eea;
}

.feature-card.advertiser {
  border-top-color: #f093fb;
}

.feature-icon {
  font-size: 3.5rem;
  margin-bottom: 1.8rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature-card.advertiser .feature-icon {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
  color: #1f2937;
}

.feature-card p {
  color: #6b7280;
  font-size: 1rem;
}

/* Stats Section */

.stats {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-align: center;
}

.stats .section-title {
  color: white;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 3rem;
  margin-top: 3rem;
}

.stat-item {
  position: relative;
}

.stat {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1.2rem;
  opacity: 0.95;
  font-weight: 500;
}

/* Footer */

footer {
  background: #0f172a;
  color: white;
  padding: 5rem 0 2.5rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-section h3 {
  margin-bottom: 1.5rem;
  color: #667eea;
  font-size: 1.3rem;
}

.footer-section a, .footer-section p {
  color: #94a3b8;
  text-decoration: none;
  display: block;
  margin-bottom: 0.8rem;
  transition: color 0.3s;
  font-size: 0.95rem;
}

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

.social-links {
  margin-top: 1.5rem;
  display: flex;
  gap: 1rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  background: rgba(102, 126, 234, 0.2);
  border-radius: 12px;
  color: #667eea;
  font-size: 1.2rem;
  transition: all 0.3s;
}

.social-link:hover {
  background: #667eea;
  color: white;
  transform: translateY(-2px);
}

.footer-bottom {
  text-align: center;
  padding-top: 3rem;
  border-top: 1px solid #334155;
  color: #64748b;
  font-size: 0.95rem;
}

/* Animations */

.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Mobile Responsive */

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 75px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 75px);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: 3rem;
    gap: 2rem;
    transition: left 0.4s ease;
  }
}

@media (max-width: 768px) {
  .nav-links.active {
    left: 0;
  }
}

@media (max-width: 768px) {
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 768px) {
  .tabs-header {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 120px 0 80px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2.2rem;
  }
}

/* WhatsApp Floating Button */

.whatsapp-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 10000;
  animation: slideInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.whatsapp-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, #25d366 0%, #128c7e 100%);
  color: white;
  padding: 16px 24px;
  border-radius: 50px;
  box-shadow: 0 12px 40px rgba(37, 211, 102, 0.4);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.whatsapp-btn:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 20px 60px rgba(37, 211, 102, 0.5);
  background: linear-gradient(135deg, #25d366 0%, #20ba5a 100%);
}

.whatsapp-btn:active {
  transform: translateY(-2px) scale(1.02);
}

.whatsapp-btn i {
  font-size: 1.4rem;
}

.whatsapp-text {
  white-space: nowrap;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(100px) scale(0.8);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Mobile WhatsApp Button */

@media (max-width: 768px) {
  .whatsapp-float {
    bottom: 20px;
    right: 20px;
  }
}

@media (max-width: 768px) {
  .whatsapp-btn {
    padding: 14px 20px;
    font-size: 0.95rem;
  }
}

@media (max-width: 768px) {
  .whatsapp-btn i {
    font-size: 1.3rem;
  }
}

/* Mobile: Show only icon */

@media (max-width: 768px) {
  .whatsapp-text {
    display: none;
  }
}

@media (max-width: 768px) {
  .whatsapp-btn {
    min-width: 56px;
    justify-content: center;
    padding: 16px;
    border-radius: 50%;
  }
}

@keyframes pulse {
  0% {
    box-shadow: 0 12px 40px rgba(37, 211, 102, 0.4);
  }
  50% {
    box-shadow: 0 12px 40px rgba(37, 211, 102, 0.6);
  }
  100% {
    box-shadow: 0 12px 40px rgba(37, 211, 102, 0.4);
  }
}