/* =========================================================
   DrishtiPathFoundation — Stylesheet
   Organized sections:
   1. CSS Variables / Reset
   2. Base & Typography
   3. Buttons & Utilities
   4. Header / Navigation
   5. Hero Section
   6. Section Titles / Generic Cards
   7. About Page (Mission/Vision/Values)
   8. Focus Areas
   9. Impact Counters
   10. Directors
   11. Top Donors Slideshow
   12. Donate Page
   13. Certificate Section + Modal
   14. Contact Page
   15. Donors Table Page
   16. Footer
   17. Floating Buttons (WhatsApp / Scroll-to-top)
   18. Animations
   19. Responsive Media Queries
   ========================================================= */

/* ---------- 1. CSS Variables / Reset ---------- */
:root {
  --primary-blue: #0D6EFD;
  --dark-blue: #084298;
  --light-blue: #EAF4FF;
  --white: #FFFFFF;
  --dark-text: #1F2937;
  --gray-text: #6B7280;
  --border-color: #E2E8F0;
  --success: #198754;
  --danger: #DC3545;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(8, 66, 152, 0.08);
  --shadow-md: 0 8px 24px rgba(8, 66, 152, 0.12);
  --shadow-lg: 0 16px 40px rgba(8, 66, 152, 0.18);
  --transition: all 0.3s ease;
  --max-width: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--dark-text);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a { text-decoration: none; color: inherit; }

ul { list-style: none; }

/* ---------- 2. Base & Typography ---------- */
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; color: var(--dark-text); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 5%;
}

.page-hero {
  background: linear-gradient(135deg, var(--dark-blue), var(--primary-blue));
  color: var(--white);
  padding: 8rem 5% 4rem;
  text-align: center;
}

.page-hero h1 { font-size: clamp(2rem, 4vw, 2.8rem); margin-bottom: 0.75rem; }
.page-hero p { font-size: 1.1rem; opacity: 0.92; max-width: 700px; margin: 0 auto; }

/* ---------- 3. Buttons & Utilities ---------- */
.btn {
  display: inline-block;
  padding: 0.85rem 1.9rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  text-align: center;
}

.btn-primary { background: var(--primary-blue); color: var(--white); }
.btn-primary:hover { background: var(--dark-blue); transform: translateY(-3px); box-shadow: var(--shadow-md); }

.btn-outline { background: transparent; border-color: var(--white); color: var(--white); }
.btn-outline:hover { background: var(--white); color: var(--primary-blue); transform: translateY(-3px); }

.btn-outline-blue { background: transparent; border-color: var(--primary-blue); color: var(--primary-blue); }
.btn-outline-blue:hover { background: var(--primary-blue); color: var(--white); transform: translateY(-3px); }

.btn-block { width: 100%; }

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

.section { padding: 5.5rem 5%; }
.section-alt { background: var(--light-blue); }

.section-header { text-align: center; max-width: 700px; margin: 0 auto 3rem; }
.section-tag {
  display: inline-block;
  color: var(--primary-blue);
  background: var(--light-blue);
  padding: 0.35rem 1rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.section-header h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); margin-bottom: 0.75rem; }
.section-header p { color: var(--gray-text); font-size: 1.05rem; }

/* ---------- 4. Header / Navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.site-header.scrolled { box-shadow: var(--shadow-md); }

.navbar {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 5%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--dark-blue);
}

.nav-logo img { height: 42px; width: 42px; border-radius: 50%; object-fit: cover; }

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

.nav-links a {
  font-weight: 500;
  color: var(--dark-text);
  position: relative;
  padding: 0.3rem 0;
  transition: var(--transition);
}

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

.nav-links a:hover,
.nav-links a.active { color: var(--primary-blue); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

.nav-links .btn-primary { color: var(--white); padding: 0.6rem 1.4rem; }
.nav-links .btn-primary::after { display: none; }

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 30px;
  height: 24px;
  cursor: pointer;
  z-index: 1100;
}

.hamburger span {
  display: block;
  height: 3px;
  width: 100%;
  background: var(--dark-blue);
  border-radius: 3px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- 5. Hero Section ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: linear-gradient(120deg, rgba(8, 66, 152, 0.88), rgba(13, 110, 253, 0.78)),
    url('../images/hero-placeholder.jpg') center/cover no-repeat;
  color: var(--white);
}

.hero-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 5%;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 3rem;
}

.hero-text h1 {
  font-size: clamp(2.1rem, 4.5vw, 3.4rem);
  margin-bottom: 1.2rem;
  color: var(--white);
}

.hero-text p {
  font-size: 1.15rem;
  opacity: 0.95;
  margin-bottom: 2rem;
  max-width: 560px;
}

.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Hero photo slideshow — reuses .slider-btn / .slider-dots / .dot from the
   Top Donors Slideshow below, so both sliders share the same JS behaviour. */
.hero-slider {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 4px solid rgba(255, 255, 255, 0.25);
}

.hero-slide { display: none; width: 100%; height: 100%; animation: fadeIn 0.8s ease; }
.hero-slide.active { display: block; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; display: block; }

.hero-slider .slider-dots { position: absolute; left: 0; right: 0; bottom: 16px; margin-top: 0; z-index: 6; }
.hero-slider .dot { background: rgba(255, 255, 255, 0.55); }
.hero-slider .dot.active { background: var(--white); }

/* ---------- 6. Generic Cards ---------- */
.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }

/* ---------- 7. About Page ---------- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-intro img { border-radius: var(--radius); box-shadow: var(--shadow-md); }

.mv-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; margin-top: 2rem; }

.mv-card {
  background: var(--light-blue);
  border-radius: var(--radius);
  padding: 2.2rem;
  border-left: 5px solid var(--primary-blue);
}

.mv-card h3 { color: var(--dark-blue); margin-bottom: 0.6rem; font-size: 1.4rem; }

.values-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1.5rem; margin-top: 2.5rem; }

.value-card {
  text-align: center;
  padding: 2rem 1.2rem;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.value-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: var(--primary-blue); }

.value-icon { font-size: 2.4rem; margin-bottom: 0.9rem; }
.value-card h4 { font-size: 1.05rem; color: var(--dark-blue); }

/* ---------- 8. Focus Areas ---------- */
.focus-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }

.focus-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2.2rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border-bottom: 4px solid transparent;
}

.focus-card:hover { border-bottom-color: var(--primary-blue); transform: translateY(-6px); box-shadow: var(--shadow-md); }

.focus-icon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: var(--light-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 1.2rem;
}

.focus-card h3 { font-size: 1.2rem; margin-bottom: 0.6rem; color: var(--dark-blue); }
.focus-card p { color: var(--gray-text); font-size: 0.95rem; }

/* ---------- 9. Impact Counters ---------- */
.impact-section {
  background: linear-gradient(120deg, var(--dark-blue), var(--primary-blue));
  color: var(--white);
  padding: 4.5rem 5%;
}

.counter-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.counter-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.2rem;
}

.counter-label { margin-top: 0.5rem; font-size: 1rem; opacity: 0.92; }

/* ---------- 10. Directors ---------- */
.directors-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }

.director-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.director-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }

.director-photo { width: 100%; height: 280px; overflow: hidden; }
.director-photo img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.director-card:hover .director-photo img { transform: scale(1.06); }

.director-info { padding: 1.6rem; }
.director-info h3 { color: var(--dark-blue); font-size: 1.25rem; margin-bottom: 0.2rem; }
.director-position { color: var(--primary-blue); font-weight: 600; font-size: 0.95rem; margin-bottom: 0.8rem; }
.director-desc { color: var(--gray-text); font-size: 0.92rem; }

/* ---------- 11. Top Donors Slideshow ---------- */
.donor-slider {
  position: relative;
  max-width: 620px;
  margin: 0 auto;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 3rem 4rem;
  overflow: hidden;
}

.donor-slide { display: none; text-align: center; animation: fadeIn 0.6s ease; }
.donor-slide.active { display: block; }

.donor-slide img {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 1.2rem;
  border: 4px solid var(--light-blue);
}

.donor-slide h3 { color: var(--dark-blue); font-size: 1.3rem; margin-bottom: 0.5rem; }
.donor-slide p { color: var(--gray-text); font-style: italic; }

.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary-blue);
  color: var(--white);
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  z-index: 5;
}

.slider-btn:hover { background: var(--dark-blue); }
.slider-prev { left: 14px; }
.slider-next { right: 14px; }

.slider-dots { display: flex; justify-content: center; gap: 0.6rem; margin-top: 1.8rem; }

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.dot.active { background: var(--primary-blue); width: 26px; border-radius: 6px; }

/* ---------- 12. Donate Page ---------- */
.donate-card {
  max-width: 520px;
  margin: 0 auto;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 2.8rem;
  text-align: center;
  border-top: 6px solid var(--primary-blue);
}

.donate-org { font-size: 1.3rem; font-weight: 700; color: var(--dark-blue); margin-bottom: 1.5rem; }

.qr-box {
  background: var(--light-blue);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
  display: inline-block;
  margin-bottom: 1.5rem;
}

.qr-box img { width: 220px; height: 220px; object-fit: contain; border-radius: 8px; background: var(--white); }

.qr-download-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--primary-blue);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px dashed var(--primary-blue);
  padding-bottom: 2px;
  cursor: pointer;
  transition: var(--transition);
}

.qr-download-link:hover { color: var(--dark-blue); border-color: var(--dark-blue); }

.upi-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  background: var(--light-blue);
  padding: 0.9rem 1.2rem;
  border-radius: 50px;
  margin-bottom: 1.8rem;
  flex-wrap: wrap;
}

.upi-id { font-weight: 700; color: var(--dark-blue); letter-spacing: 0.5px; }

.copy-btn {
  border: 1px solid var(--primary-blue);
  background: var(--white);
  color: var(--primary-blue);
  padding: 0.35rem 0.9rem;
  border-radius: 50px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: var(--transition);
}

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

.donate-note { color: var(--gray-text); font-size: 0.92rem; margin-top: 1rem; }

/* Two payment method cards (UPI + Bank Transfer) side by side */
.payment-methods-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
  align-items: start;
  max-width: var(--max-width);
  margin: 0 auto;
}

.payment-method-title { color: var(--dark-blue); font-size: 1.15rem; margin-bottom: 1.5rem; }

.bank-details { margin-bottom: 1.5rem; }

.bank-detail-row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  background: var(--light-blue);
  padding: 0.9rem 1.2rem;
  border-radius: 12px;
  margin-bottom: 0.9rem;
  text-align: left;
  flex-wrap: wrap;
}

.bank-detail-label {
  color: var(--gray-text);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  min-width: 110px;
}

.bank-detail-row strong { color: var(--dark-blue); font-weight: 700; flex: 1; word-break: break-word; }

.donate-info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 3.5rem auto 0;
}

/* ---------- 13. Certificate Section + Modal ---------- */
.certificate-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3rem;
  align-items: center;
}

.certificate-img-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  cursor: pointer;
}

.certificate-img-wrap img { width: 100%; transition: var(--transition); }
.certificate-img-wrap:hover img { transform: scale(1.04); }

.certificate-img-wrap::after {
  content: '🔍 Click to enlarge';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(8, 66, 152, 0.85);
  color: var(--white);
  text-align: center;
  padding: 0.6rem;
  font-size: 0.9rem;
  transform: translateY(100%);
  transition: var(--transition);
}

.certificate-img-wrap:hover::after { transform: translateY(0); }

.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.85);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.modal-overlay.open { display: flex; animation: fadeIn 0.3s ease; }

.modal-box { position: relative; max-width: 800px; width: 100%; }
.modal-box img { width: 100%; border-radius: var(--radius-sm); box-shadow: var(--shadow-lg); }

.modal-close {
  position: absolute;
  top: -45px;
  right: 0;
  background: var(--white);
  border: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-size: 1.3rem;
  cursor: pointer;
  color: var(--dark-blue);
}

/* ---------- 14. Contact Page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3rem;
}

.contact-info-card {
  background: var(--light-blue);
  border-radius: var(--radius);
  padding: 2.5rem;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.6rem;
}

.contact-info-item .icon {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-info-item h4 { color: var(--dark-blue); margin-bottom: 0.2rem; }
.contact-info-item p, .contact-info-item a { color: var(--gray-text); }

.contact-form-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.form-group { margin-bottom: 1.3rem; }
.form-group label { display: block; margin-bottom: 0.4rem; font-weight: 600; font-size: 0.92rem; }

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus { outline: none; border-color: var(--primary-blue); box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.12); }

.form-group textarea { resize: vertical; min-height: 120px; }

.error-text { color: var(--danger); font-size: 0.82rem; margin-top: 0.3rem; display: none; }
.form-group.invalid input,
.form-group.invalid textarea { border-color: var(--danger); }
.form-group.invalid .error-text { display: block; }

.form-success {
  display: none;
  background: #d1e7dd;
  color: #0f5132;
  padding: 1rem 1.2rem;
  border-radius: var(--radius-sm);
  margin-top: 1rem;
  font-weight: 500;
}

.form-success.show { display: block; animation: fadeIn 0.4s ease; }

/* ---------- 15. Donors Table Page ---------- */
.donor-controls {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  align-items: center;
  justify-content: space-between;
  background: var(--light-blue);
  padding: 1.3rem;
  border-radius: var(--radius);
}

.donor-controls input,
.donor-controls select {
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--white);
}

.donor-controls input { flex: 1; min-width: 200px; }

.donor-status { margin-bottom: 1rem; color: var(--gray-text); font-size: 0.9rem; }

.donor-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

table.donor-table { width: 100%; border-collapse: collapse; min-width: 600px; }

.donor-table th,
.donor-table td { padding: 1rem 1.2rem; text-align: left; white-space: nowrap; }

.donor-table thead { background: var(--dark-blue); color: var(--white); }
.donor-table thead th { cursor: pointer; user-select: none; }
.donor-table thead th.sortable:hover { background: var(--primary-blue); }

.donor-table tbody tr:nth-child(even) { background: var(--light-blue); }
.donor-table tbody tr:hover { background: #dcecff; }

.no-results { text-align: center; padding: 2.5rem; color: var(--gray-text); }

/* ---------- 16. Footer ---------- */
.site-footer { background: var(--dark-blue); color: var(--white); padding: 4rem 5% 0; }

.footer-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-brand h3 { color: var(--white); margin-bottom: 0.8rem; }
.footer-brand p { opacity: 0.85; font-size: 0.95rem; }

.footer-social { display: flex; gap: 0.8rem; margin-top: 1.2rem; }
.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--primary-blue); transform: translateY(-3px); }
.footer-social a svg { width: 18px; height: 18px; fill: var(--white); }

.footer-col h4 { color: var(--white); margin-bottom: 1.1rem; font-size: 1.05rem; }
.footer-col ul li { margin-bottom: 0.7rem; }
.footer-col a { opacity: 0.85; transition: var(--transition); }
.footer-col a:hover { opacity: 1; color: var(--light-blue); padding-left: 4px; }

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 0;
  text-align: center;
}

.jai-bhim {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 0.6rem;
  color: var(--white);
}

.footer-copy { opacity: 0.75; font-size: 0.88rem; }

/* ---------- 17. Floating Buttons ---------- */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 58px;
  height: 58px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 18px rgba(37, 211, 102, 0.45);
  z-index: 900;
  transition: var(--transition);
}

.whatsapp-float:hover { transform: scale(1.1) rotate(8deg); box-shadow: 0 8px 22px rgba(37, 211, 102, 0.6); }
.whatsapp-float svg { width: 30px; height: 30px; fill: var(--white); }

.scroll-top-btn {
  position: fixed;
  bottom: 24px;
  right: 92px;
  width: 46px;
  height: 46px;
  background: var(--primary-blue);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: var(--transition);
}

.scroll-top-btn.show { opacity: 1; visibility: visible; transform: translateY(0); }
.scroll-top-btn:hover { background: var(--dark-blue); }

/* ---------- 18. Animations ---------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in-up { animation: fadeIn 0.7s ease both; }

/* ---------- 19. Responsive Media Queries ---------- */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero-text p { margin: 0 auto 2rem; }
  .hero-buttons { justify-content: center; }
  .about-intro { grid-template-columns: 1fr; }
  .certificate-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: repeat(3, 1fr); }
  .donate-info-grid { grid-template-columns: 1fr; }
  .payment-methods-grid { grid-template-columns: 1fr; max-width: 520px; }
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 78%;
    max-width: 320px;
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1.6rem;
    padding: 2rem 2.5rem;
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.1);
    transform: translateX(100%);
    transition: transform 0.35s ease;
  }

  .nav-links.active { transform: translateX(0); }
  .nav-links .btn-primary { margin-top: 0.5rem; }

  .grid-3, .grid-2, .directors-grid, .focus-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .mv-grid { grid-template-columns: 1fr; }
  .counter-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem 1rem; }
  .donor-slider { padding: 2.5rem 1.2rem; }
  .slider-prev { left: 6px; }
  .slider-next { right: 6px; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr 1fr; }
  .counter-grid { grid-template-columns: 1fr 1fr; }
  .donate-card { padding: 2rem 1.4rem; }
  .qr-box img { width: 170px; height: 170px; }
  .scroll-top-btn { right: 84px; width: 40px; height: 40px; bottom: 20px; }
  .whatsapp-float { width: 52px; height: 52px; bottom: 20px; right: 20px; }
}