:root {
  /* Colors matched to the AHA RS logo */
  --primary-yellow: #FFE600;
  --secondary-orange: #F59322;
  --dark-text: #1C1C1C;
  --background-light: #FAFAFA;
  --white: #FFFFFF;
  --glass-bg: rgba(255, 255, 255, 0.90);
  
  /* Radii for modern aesthetic */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

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

html {
  scroll-behavior: smooth;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* NAVBAR (Glassmorphism effect) */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 48px;
  background: transparent;
  transition: all 0.3s ease;
  z-index: 1000;
}

.navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 16px 48px;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.logo-aha {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.nav-logo {
  height: 90px;
  width: auto;
  transition: height 0.3s ease, filter 0.3s ease;
  /* Add a white glow so the dark logo text is readable on the dark hero background */
  filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.9)) drop-shadow(0 4px 6px rgba(0,0,0,0.4));
}

.navbar.scrolled .nav-logo {
  height: 70px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.15));
}

.nav-links a {
  text-decoration: none;
  font-weight: 600;
  margin-left: 32px;
  transition: all 0.3s ease;
}

/* Nav links colors */
.nav-links > a:not(.btn-primary-outline) {
  color: var(--white);
}

.navbar.scrolled .nav-links > a:not(.btn-primary-outline) {
  color: var(--dark-text);
}

.nav-links > a:not(.btn-primary-outline):hover {
  color: var(--primary-yellow) !important;
}

.btn-primary-outline {
  border: 2px solid var(--primary-yellow);
  padding: 10px 24px;
  border-radius: var(--radius-md);
  color: var(--primary-yellow) !important;
}

.btn-primary-outline:hover {
  background: var(--primary-yellow);
  color: var(--dark-text) !important;
  border-color: var(--primary-yellow);
}

.navbar.scrolled .btn-primary-outline {
  border-color: var(--secondary-orange);
  color: var(--secondary-orange) !important;
}

.navbar.scrolled .btn-primary-outline:hover {
  background: var(--secondary-orange);
  color: var(--white) !important;
}

/* BUTTONS */
.btn-primary {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-yellow) 0%, var(--secondary-orange) 100%);
  color: var(--dark-text);
  font-weight: 700;
  padding: 18px 36px;
  border-radius: var(--radius-md);
  text-decoration: none;
  box-shadow: 0 10px 30px rgba(245, 147, 34, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 35px rgba(245, 147, 34, 0.4);
}

.btn-large {
  font-size: 1.25rem;
  padding: 24px 56px;
}

/* HERO SECTION */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(rgba(28, 28, 28, 0.65), rgba(28, 28, 28, 0.8)), url('hero-bg.png') center/cover;
  color: var(--white);
  padding: 120px 48px 48px;
}

.hero-content {
  max-width: 900px;
}

.hero-content h1 {
  font-size: 4.5rem;
  line-height: 1.1;
  margin-bottom: 24px;
  font-weight: 700;
  letter-spacing: -1px;
}

.hero-content p {
  font-size: 1.35rem;
  margin-bottom: 48px;
  opacity: 0.95;
  font-weight: 300;
  max-width: 700px;
}

/* ABOUT SECTION */
.about-section {
  padding: 120px 0;
  background-color: var(--background-light);
}

.modern-card {
  background: var(--white);
  padding: 80px 40px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.04);
  text-align: center;
  border-top: 6px solid var(--primary-yellow);
}

.modern-card h2 {
  font-size: 2.8rem;
  color: var(--dark-text);
  margin-bottom: 32px;
}

.modern-card p {
  font-size: 1.25rem;
  max-width: 800px;
  margin: 0 auto;
  color: #444;
}

/* BENEFITS SECTION */
.benefits-section {
  padding: 60px 0 140px;
}

.benefits-section h2 {
  text-align: center;
  font-size: 3rem;
  margin-bottom: 80px;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 40px;
}

.benefit-card {
  background: var(--white);
  padding: 48px 32px;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-yellow) 0%, var(--secondary-orange) 100%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.benefit-card:hover {
  transform: translateY(-12px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.benefit-card:hover::before {
  opacity: 1;
}

.benefit-card .icon {
  font-size: 3.5rem;
  margin-bottom: 24px;
}

.benefit-card h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
  color: var(--dark-text);
}

.benefit-card p {
  color: #555;
  font-size: 1.05rem;
}

/* BOTTOM CTA */
.bottom-cta {
  background: var(--dark-text);
  color: var(--white);
  padding: 140px 0;
  position: relative;
  overflow: hidden;
}

.bottom-cta::after {
  content: "";
  position: absolute;
  bottom: -150px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--secondary-orange) 0%, transparent 70%);
  opacity: 0.15;
  filter: blur(40px);
}

.bottom-cta h2 {
  font-size: 3.5rem;
  margin-bottom: 64px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.2;
}

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

/* FOOTER */
footer {
  background: #111;
  color: #888;
  text-align: center;
  padding: 32px 0;
  font-size: 0.9rem;
}

/* ANIMATIONS */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1s ease, transform 1s ease;
}

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

.slide-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* RESPONSIVE */
@media (max-width: 992px) {
  .hero-content h1 {
    font-size: 3.5rem;
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 16px 24px;
  }
  
  .navbar.scrolled {
    padding: 16px 24px;
  }
  
  .nav-links {
    display: none; /* simple mobile nav approach for landing phase */
  }

  .hero-section {
    padding: 100px 24px 48px;
  }

  .hero-content h1 {
    font-size: 2.8rem;
  }
  
  .hero-content p {
    font-size: 1.15rem;
  }

  .modern-card {
    padding: 48px 24px;
  }
  
  .modern-card h2, .benefits-section h2 {
    font-size: 2.2rem;
  }
  
  .bottom-cta h2 {
    font-size: 2.4rem;
  }
  
  .btn-large {
    padding: 20px 32px;
    font-size: 1.1rem;
    width: 100%;
  }
}