:root {
  /* COLOR SYSTEM - Green Theme */
  --color-primary: #0a5c36;
  --color-primary-light: #0e7c4a;
  --color-primary-lighter: #12a255;
  --color-primary-dark: #073d26;
  --color-text-dark: #0a0a0a;
  --color-text-muted: #666;
  --color-border: #e0e0e0;
  --color-bg: #fff;
  --color-bg-light: #f9f9f9;
  --color-accent: #d4a537;
  --color-danger: #d32f2f;

  /* TYPOGRAPHY */
  --font-sans: 'Segoe UI', Arial, sans-serif;
  --font-size-base: 16px;
  --font-weight-normal: 400;
  --font-weight-bold: 600;

  /* SPACING SYSTEM */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* BORDER RADIUS */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* TRANSITIONS */
  --transition: all 0.3s ease;
}

/* ====================================
   RESET & BASE STYLES
   ==================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

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

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

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

a:hover {
  color: var(--color-primary-light);
}

/* ====================================
   HEADER & NAVIGATION
   ==================================== */
header {
  background-color: var(--color-bg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex: 1;
}

.logo {
  height: 70px;
  width: auto;
}

header h1 {
  font-size: 1.4rem;
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

nav {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

nav a {
  color: var(--color-text-dark);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

nav a.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

/* HAMBURGER MENU */
.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  background: none;
  border: none;
  padding: var(--spacing-sm);
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--color-text-dark);
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

/* ====================================
   HERO SECTION
   ==================================== */
.hero {
  min-height: 70vh;
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
    url('./images/herobg.jpg') center/cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-md);
}

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

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--spacing-lg);
  font-weight: var(--font-weight-bold);
}

.hero p {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xl);
  color: rgba(255, 255, 255, 0.95);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ====================================
   BUTTONS & LINKS
   ==================================== */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 30px;
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-align: center;
  font-size: 1rem;
}

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

.btn.primary:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-2px);
}

.btn.secondary {
  background-color: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

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

.btn:active {
  transform: scale(0.98);
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ====================================
   CONTENT SECTIONS
   ==================================== */
section {
  padding: var(--spacing-2xl) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-dark);
  text-align: center;
}

h2 span {
  color: var(--color-primary);
}

h3 {
  font-size: 1.3rem;
  color: var(--color-text-dark);
}

.intro {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
  font-size: 1.05rem;
}

/* ABOUT SECTION */
.about {
  background-color: var(--color-bg-light);
  text-align: center;
}

.about p {
  max-width: 700px;
  margin: var(--spacing-md) auto;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.mission-statement {
  background-color: var(--color-bg);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  margin-top: var(--spacing-xl);
  text-align: left;
}

.mission-statement h3 {
  color: var(--color-primary);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.mission-statement ul {
  list-style-position: inside;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.mission-statement li {
  margin-bottom: var(--spacing-md);
}

/* CERTIFICATIONS */
.cert-section {
  text-align: center;
  background-color: var(--color-bg);
}

.cert-grid {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  flex-wrap: wrap;
}

.cert-grid img {
  max-width: 300px;
  height: auto;
  border-radius: var(--radius-lg);
}

/* GALLERY PREVIEW */
.gallery-preview {
  background-color: var(--color-bg-light);
  text-align: center;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

.gallery-grid img {
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: var(--transition);
}

.gallery-grid img:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* ====================================
   CARDS & GRIDS
   ==================================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.card {
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background-color: var(--color-bg-light);
}

.card-content {
  padding: var(--spacing-lg);
}

.card h3 {
  margin-bottom: var(--spacing-sm);
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* PROGRAM/TEAM CARDS */
.program-card {
  background-color: var(--color-bg-light);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  text-align: center;
}

.program-card i,
.program-card .icon {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.program-card h3 {
  margin-bottom: var(--spacing-md);
}

.program-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* TEAM CARDS */
.team-card {
  background-color: var(--color-bg-light);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  text-align: center;
}

.team-card img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: var(--spacing-md);
  border: 4px solid var(--color-primary);
}

.team-card h3 {
  margin-bottom: var(--spacing-sm);
}

.team-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* STUDENT/BOOK CARDS */
.student-card,
.book-card {
  background-color: var(--color-bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.student-card:hover,
.book-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.student-card img,
.book-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.student-card i,
.book-card i {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.student-card h4,
.book-card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-dark);
}

.student-card .price {
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  font-size: 1.2rem;
}

.book-card .author {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.book-card .description {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
}

.student-card.highlight {
  border: 2px solid var(--color-primary);
  background: linear-gradient(135deg, rgba(10, 92, 54, 0.05), transparent);
}

/* IMPACT METRICS */
.impact-section {
  background-color: var(--color-bg);
}

.impact-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
  padding: var(--spacing-lg);
  background-color: var(--color-bg-light);
  border-radius: var(--radius-lg);
}

.impact-icon {
  min-width: 100px;
  font-size: 3.5rem;
  color: var(--color-primary);
}

.impact-text h3 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.impact-text p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ====================================
   FOOTER
   ==================================== */
footer {
  background-color: #385bc4;
  color: rgba(255, 255, 255, 0.9);
  padding: var(--spacing-2xl) var(--spacing-md);
  text-align: center;
}

footer a {
  color: rgba(255, 255, 255, 0.95);
}

footer a:hover {
  color: white;
  text-decoration: underline;
}

.footer-logos {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-2xl);
}

.footer-logo {
  max-width: 150px;
  height: auto;
}

.cta-section {
  background-color: #385bc4;
  color: white;
  text-align: center;
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-2xl);
}

.cta-section h2,
.cta-section p {
  color: white;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}

.contact-links {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  margin: var(--spacing-xl) 0;
}

.contact-links li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.contact-links a {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.95);
}

.contact-links i {
  font-size: 1.3rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-lg);
  font-size: 0.9rem;
}

.back-to-top {
  display: inline-block;
  margin-top: var(--spacing-lg);
}

/* ====================================
   MODALS & OVERLAYS
   ==================================== */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background-color: var(--color-bg);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  max-width: 500px;
  width: 90%;
  position: relative;
  animation: slideUp 0.3s ease;
  max-height: 90vh;
  overflow-y: auto;
}

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

.modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--color-text-dark);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: var(--transition);
}

.modal-close:hover {
  background-color: var(--color-bg-light);
}

.modal-content h2 {
  text-align: left;
  margin-bottom: var(--spacing-md);
}

.modal-content p {
  margin-bottom: var(--spacing-md);
}

.donation-details {
  background-color: var(--color-bg-light);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
}

.donation-details p {
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
}

/* ====================================
   GALLERY PAGE SPECIFIC
   ==================================== */
.gallery-page-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 250px;
  object-fit: contain;
  transition: var(--transition);
  background-color: var(--color-bg-light);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

/* ====================================
   ACCESSIBILITY
   ==================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ====================================
   RESPONSIVE DESIGN - MOBILE FIRST
   ==================================== */
@media (max-width: 768px) {
  header h1 {
    font-size: 1.2rem;
  }

  nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    gap: var(--spacing-md);
    z-index: 99;
  }

  nav.active {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }

  section {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  h2 {
    font-size: 1.6rem;
  }

  .hero {
    min-height: 60vh;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-buttons {
    gap: var(--spacing-sm);
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .impact-row {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-lg);
  }

  .contact-links {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .logo {
    height: 50px;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1025px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .gallery-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  section {
    padding: var(--spacing-2xl) var(--spacing-lg);
  }
}

/* PRINT STYLES */
@media print {
  header,
  footer,
  .menu-toggle {
    display: none;
  }

  body {
    line-height: 1.4;
  }
}