/* =======================================================
   GLOBAL RESETS
======================================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #ffffff;

  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-width: 320px;
}

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

/* =======================================================
   GLASS HEADER + STICKY SCROLL SYSTEM
======================================================= */
.header {
  position: fixed;    /* FIXED = Sticky always */
  top: 0;
  left: 0;
  width: 100%;
  padding: 18px 0;
  z-index: 2000;

  background: rgba(255, 255, 255, 0.03);
  
 

  transition: background 0.3s ease, box-shadow 0.3s ease;
}

/* Solid header when scrolling */
.header.scrolled {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.15);
}

/* Change text color on scroll for readability */
.header.scrolled .nav a,
.header.scrolled .logo span,
.header.scrolled .logo small {
  color: #006B57 !important;
  text-shadow: none;
}

/* =======================================================
   HEADER INNER STRUCTURE
======================================================= */
.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* LOGO */
.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo img {
  width: 75px;
  height: 75px;
  object-fit: contain;
}

.logo span {
  font-size: 15px;
  font-weight: 700;
  color: white;
  text-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

.logo small {
  font-size: 11px;
  color: rgba(255,255,255,0.85);
  text-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

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

.nav a {
  color: white;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  transition: 0.3s ease;
  text-shadow: 0 2px 8px rgba(0,0,0,0.45);
}

.nav a:hover {
  color: #d9fff1;
  transform: translateY(-2px);
}

/* =======================================================
   MOBILE MENU TOGGLE
======================================================= */
.menu-toggle {
  display: none;
  font-size: 32px;
  color: white;
  cursor: pointer;
  text-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

/* MOBILE MENU */
@media (max-width: 968px) {
  .menu-toggle {
    display: block;
  }

  .nav {
    display: none;
    flex-direction: column;
    gap: 20px;
    position: absolute;
    top: 90px;
    right: 24px;
    width: 70%;

    background: rgba(255, 255, 255, 0.15);
    padding: 24px 30px;
    border-radius: 14px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(15px);
    animation: dropdown 0.3s ease forwards;
  }

  .nav.active {
    display: flex;
  }

  .nav a {
    font-size: 17px;
    color: white;
    text-shadow: none;
  }

  /* Scroll state overrides on mobile */
  .header.scrolled .nav a {
    color: #006B57 !important;
  }

  .logo img {
    width: 60px;
    height: 60px;
  }

  @keyframes dropdown {
    from { opacity: 0; transform: translateY(-10px); }
    to   { opacity: 1; transform: translateY(0); }
  }
}

.logo-img {
  width: 75px;
  height: 75px;
  object-fit: contain;
  transition: opacity 0.3s ease, transform 0.3s ease;
  position: absolute;
}

.default-logo {
  opacity: 1;
}

.scrolled-logo {
  opacity: 0;
}

.header.scrolled .default-logo {
  opacity: 0;
  transform: scale(0.9);
}

.header.scrolled .scrolled-logo {
  opacity: 1;
  transform: scale(1);
}


/* =======================================================
   FOOTER
======================================================= */
.footer {
  background: #1a1a1a;
  color: white;
  padding: 60px 0 24px;
}

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

@media (max-width: 968px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}


.footer-col h4 {
  margin-bottom: 20px;
  font-size: 1.125rem;
}

.footer-col p {
  color: #aaa;
  line-height: 1.8;
  font-size: 0.875rem;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul li a {
  color: #aaa;
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.3s;
}

.footer-col ul li a:hover {
  color: #009879;
}

.social-icons {
  display: flex;
  gap: 12px;
}

.social-icons a {
  width: 36px;
  height: 36px;
  background: #333;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-decoration: none;
  transition: background 0.3s;
}

.social-icons a:hover {
  background: #009879;
}

.footer-bottom {
  border-top: 1px solid #333;
  padding-top: 24px;
  text-align: center;
}

.sdg-icons {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.sdg-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
}

.footer-bottom p {
  color: #aaa;
  font-size: 0.875rem;
}

/* ---------------- RESPONSIVE ---------------- */
@media (max-width: 968px) {
  .menu-toggle {
    display: block;
  }

  .nav {
    display: none;
    flex-direction: column;
    gap: 16px;
    background: white; /* Mobile menu background stays white */
    position: absolute;
    top: 72px;
    right: 24px;
    padding: 20px 28px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    z-index: 1001;
  }

  .nav.active {
    display: flex;
  }

  /* IMPORTANT: Revert text color to green/dark for mobile menu */
  .nav a {
    color: #006B57; 
    font-size: 16px;
    text-shadow: none;
  }

  .nav a:hover {
    color: #009879;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .about-grid,
  .programs-grid,
  .sdg-grid,
  .impact-grid,
  .events-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .partners-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .cta-section h2 {
    font-size: 1.75rem;
  }
}

@media (min-width: 969px) and (max-width: 1200px) {
  .programs-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .sdg-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}