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

:root {
  /* Brand Colors */
  --color-primary: #0A3D62; /* Dark Blue */
  --color-secondary: #F4B400; /* Gold/Amber */
  --color-white: #FFFFFF;
  --color-light-gray: #F5F5F5;
  --color-dark-gray: #333333;
  --color-text: #4a4a4a;
  --color-overlay: rgba(10, 61, 98, 0.85);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing & Layout */
  --container-width: 1200px;
  --section-padding: 5rem 2rem;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 4px 6px rgba(0,0,0,0.05);
  --shadow-md: 0 10px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 40px rgba(10, 61, 98, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  line-height: 1.6;
  background-color: var(--color-light-gray);
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

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

/* Layout Utilities */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

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

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

.section-bg-primary h2, .section-bg-primary h3, .section-bg-primary p {
  color: var(--color-white);
}

.page-header h1, .page-header h2, .page-header h3 {
  color: var(--color-white);
}

.text-center { text-align: center; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-family: var(--font-heading);
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: transparent;
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  box-shadow: 0 0 15px rgba(244, 180, 0, 0.4);
}

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

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

.nav-donate-btn {
  padding: 0.5rem 1.5rem;
  color: var(--color-primary);
}

.nav-donate-btn:hover {
  color: var(--color-secondary);
}

.social-icon {
  width: 40px;
  height: 40px;
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.social-icon:hover {
  background: var(--color-secondary);
  color: var(--color-white);
  transform: translateY(-3px);
}

/* Header & Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo span {
  color: var(--color-secondary);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  color: var(--color-dark-gray);
  font-size: 0.95rem;
  position: relative;
}

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

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

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

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

/* Hero Section */
.hero {
  height: 100vh;
  min-height: 600px;
  background-image: linear-gradient(var(--color-overlay), var(--color-overlay)), url('../images/hero_african_graduates_1779530830738.webp');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-white);
  padding-top: 80px;
}

.hero-content {
  max-width: 800px;
}

.hero-tagline {
  color: var(--color-secondary);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: block;
  animation: slideDown 1s ease-out;
}

.hero h1 {
  font-size: 3.5rem;
  color: var(--color-white);
  margin-bottom: 1.5rem;
  animation: fadeIn 1.2s ease-out;
}

.hero p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  animation: fadeIn 1.4s ease-out;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  animation: slideUp 1.6s ease-out;
}

/* Cards & Grids */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-align: center;
  border-bottom: 4px solid transparent;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-md);
  border-bottom-color: var(--color-secondary);
}

.card-icon {
  width: 60px;
  height: 60px;
  background-color: rgba(244, 180, 0, 0.1);
  color: var(--color-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto 1.5rem;
}

.card h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

/* Impact Section */
.impact-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat-item h3 {
  font-size: 3rem;
  color: var(--color-secondary);
  margin-bottom: 0.5rem;
}

.stat-item p {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 1.1rem;
}

/* Footer */
.footer {
  background-color: var(--color-dark-gray);
  color: var(--color-white);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  color: var(--color-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.footer-col p, .footer-col ul li {
  color: #bbb;
  margin-bottom: 0.8rem;
}

.footer-col ul li a:hover {
  color: var(--color-secondary);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: #888;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

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

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

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    position: absolute;
    top: 80px;
    left: -100%;
    width: 100%;
    background-color: var(--color-white);
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
  }
  
  .nav-links.active {
    left: 0;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
}