/* ===== Variables ===== */
:root{
  --navy:#0b1d4b;
  --blue:#1e63d3;
  --silver:#f2f4f8;
  --white:#ffffff;
  --text:#061220;
  --radius:12px;
  --container:1100px;
  --transition:all .4s ease;
}

*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Inter',sans-serif;color:var(--text);background:var(--white);}
img{max-width:100%;display:block;border-radius:var(--radius);}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}
.container{max-width:var(--container);margin:0 auto;padding:0 1rem;}

/* ===== Header ===== */
.header{background:linear-gradient(90deg,var(--navy),var(--blue));color:var(--white);position:sticky;top:0;z-index:999;}
.header-flex{display:flex;justify-content:space-between;align-items:center;padding:0.8rem 0;}
.brand{display:flex;align-items:center;gap:10px;color:var(--white);}
.logo{width:45px;height:45px;background:var(--silver);color:var(--navy);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;}
.title{font-size:1rem;}
.tagline{font-size:0.7rem;color:#e0e0e0;}

.nav{display:flex;gap:16px;}
.nav a{color:var(--silver);font-weight:600;transition:var(--transition);}
.nav a:hover,.nav a.active{color:var(--white);}
.nav-toggle{display:none;background:none;border:0;color:var(--white);font-size:1.5rem;}

@media(max-width:800px){
  .nav{display:none;flex-direction:column;background:var(--navy);position:absolute;top:60px;right:10px;border-radius:8px;padding:10px;}
  .nav.show{display:flex;}
  .nav-toggle{display:block;}
}

/* ===== Hero ===== */
.hero{position:relative;height:70vh;display:flex;align-items:center;justify-content:center;overflow:hidden;}
.hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.overlay{position:relative;z-index:2;text-align:center;color:#fff;background:rgba(11,29,75,0.55);padding:2rem;border-radius:10px;}
.overlay h2{font-size:2rem;margin-bottom:1rem;}
.overlay p{max-width:600px;margin:0 auto 1rem;}
.hero-buttons{display:flex;gap:1rem;justify-content:center;}
.btn{background:var(--blue);color:#fff;padding:0.6rem 1rem;border-radius:var(--radius);font-weight:600;transition:var(--transition);}
.btn:hover{background:var(--navy);}
.btn.alt{background:var(--white);color:var(--navy);}
.pale{background:var(--silver);}

/* ===== Sections ===== */
.section{padding:60px 0;}
.section-title{text-align:center;margin-bottom:1rem;color:var(--navy);}
.intro{text-align:center;margin-bottom:1.5rem;color:#444;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;}
.card{background:var(--white);padding:1rem;border-radius:var(--radius);box-shadow:0 4px 20px rgba(0,0,0,0.05);}
.program-card{background:#fff;padding:1rem;border-radius:var(--radius);text-align:center;box-shadow:0 4px 20px rgba(0,0,0,0.05);}
.program-card img{height:180px;object-fit:cover;margin-bottom:0.5rem;}
.center{text-align:center;margin-top:1.5rem;}

/* Gallery */
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:0.8rem;}

/* CTA */
.cta{text-align:center;}
.cta h3{margin-bottom:0.6rem;color:var(--navy);}
.cta p{color:#333;margin-bottom:1rem;}

/* Footer */
.footer{background:var(--navy);color:var(--silver);padding:1rem 0;}
.footer-grid{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;}
.footer-nav a{color:var(--silver);margin-left:1rem;}
.footer-nav a:hover{color:#fff;}

/* Back to top */
#topBtn{position:fixed;bottom:20px;right:20px;width:45px;height:45px;background:var(--blue);color:#fff;border:none;border-radius:50%;font-size:20px;display:none;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 15px rgba(0,0,0,0.2);}
#topBtn.show{display:flex;}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s ease,transform .7s ease;}
.reveal.visible{opacity:1;transform:translateY(0);}
.delay-1{transition-delay:.15s;}
.delay-2{transition-delay:.3s;}

/* Responsive grids */
/* ===== Donation Page Tabs ===== */
.donate-tabs {
  background: var(--silver);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 8px 30px rgba(11,29,75,0.1);
}

.tab-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.tab-btn {
  background: var(--navy);
  color: #fff;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  transition: all .3s ease;
}

.tab-btn:hover {
  background: var(--blue);
  transform: translateY(-2px);
}

.tab-btn.active {
  background: var(--blue);
  box-shadow: 0 4px 15px rgba(30,99,211,0.4);
}

.tab-content {
  display: none;
  background: #fff;
  border-radius: var(--radius);
  padding: 1rem;
  animation: fadeIn .4s ease;
}

.tab-content.active {
  display: block;
}

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

/* MoMo box styling */
.momo-box {
  background: var(--silver);
  border-radius: var(--radius);
  padding: 1rem;
  margin-top: 1rem;
  color: var(--text);
  box-shadow: 0 3px 12px rgba(11,29,75,0.1);
}

/* Contact form on donate page */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.contact-form input,
.contact-form textarea,
#momo-select {
  width: 100%;
  padding: 0.6rem;
  border: 1px solid #cbd5e1;
  border-radius: var(--radius);
  font-size: 0.95rem;
}

.contact-form button {
  align-self: flex-start;
}

.map-box {
  background: #fff;
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: 0 6px 25px rgba(0,0,0,0.08);
}

/* Responsive tweaks */
@media(max-width:700px){
  .tab-buttons{flex-direction:column;}
  .tab-btn{width:100%;}
}

@media(max-width:780px){
  .grid-2{grid-template-columns:1fr;}
}
/* ===== Developer Credit Signature ===== */
.dev-link {
  position: relative;
  color: var(--silver);
  font-weight: 700;
  text-decoration: none;
  transition: color 0.3s ease;
}

.dev-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--navy));
  transition: width 0.4s ease;
  border-radius: 2px;
}

.dev-link:hover {
  color: var(--blue);
  text-shadow: 0 0 8px rgba(30, 99, 211, 0.6);
}

.dev-link:hover::after {
  width: 100%;
}