:root {
  --green-950: #0a1f0f;
  --green-900: #0f2e18;
  --green-800: #1a4d2e;
  --green-700: #236b3d;
  --green-600: #2d8a4e;
  --green-500: #3aad62;
  --green-400: #5ec882;
  --green-300: #7dd3a0;
  --green-200: #b8e6cc;
  --green-100: #e2f5ea;
  --green-50: #f3fbf6;

  --earth-800: #3d2e1f;
  --earth-600: #6b5344;
  --earth-400: #a08060;
  --earth-200: #d4c4b0;

  --cream: #faf7f2;
  --white: #ffffff;
  --text: #1a2e1f;
  --text-muted: #4a6352;

  --shadow-sm: 0 1px 3px rgba(10, 31, 15, 0.08);
  --shadow-md: 0 4px 20px rgba(10, 31, 15, 0.1);
  --shadow-lg: 0 12px 40px rgba(10, 31, 15, 0.15);

  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Outfit", system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: "DM Serif Display", Georgia, serif;
  font-weight: 400;
  line-height: 1.2;
}

.container {
  width: min(1120px, 92%);
  margin-inline: auto;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(26, 77, 46, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--green-800);
  font-weight: 600;
  font-size: 1.1rem;
}

.logo-icon {
  font-size: 1.4rem;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--green-700);
}

.nav-donate {
  background: var(--green-700);
  color: var(--white) !important;
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  transition: background var(--transition), transform var(--transition) !important;
}

.nav-donate:hover {
  background: var(--green-800);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--green-800);
  border-radius: 2px;
  transition: var(--transition);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 7rem 0 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(15, 46, 24, 0.88) 0%, rgba(26, 77, 46, 0.75) 45%, rgba(45, 138, 78, 0.55) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320' preserveAspectRatio='none'%3E%3Cpath fill='%231a4d2e' fill-opacity='0.35' d='M0,224L80,213.3C160,203,320,181,480,181.3C640,181,800,203,960,197.3C1120,192,1280,160,1360,144L1440,128L1440,320L1360,320C1280,320,1120,320,960,320C800,320,640,320,480,320C320,320,160,320,80,320L0,320Z'/%3E%3Cpath fill='%232d8a4e' fill-opacity='0.25' d='M0,256L48,245.3C96,235,192,213,288,213.3C384,213,480,235,576,229.3C672,224,768,192,864,186.7C960,181,1056,203,1152,208C1248,213,1344,203,1392,197.3L1440,192L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'/%3E%3C/svg%3E") bottom / cover no-repeat,
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  background-color: var(--green-900);
}

.hero-content {
  position: relative;
  z-index: 1;
  color: var(--white);
  max-width: 720px;
}

.hero-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green-300);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: 1.25rem;
}

.hero h1 em {
  font-style: italic;
  color: var(--green-300);
}

.hero-subtitle {
  font-size: 1.15rem;
  opacity: 0.92;
  margin-bottom: 2rem;
  max-width: 560px;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  border-radius: 999px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--green-500);
  color: var(--white);
  border-color: var(--green-500);
}

.btn-primary:hover {
  background: var(--green-400);
  border-color: var(--green-400);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--white);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.stat-number {
  display: block;
  font-family: "DM Serif Display", serif;
  font-size: 1.75rem;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.85rem;
  opacity: 0.75;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--green-50);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-600);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--green-900);
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--text-muted);
}

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

.about-text p {
  margin-bottom: 1.25rem;
  color: var(--text-muted);
}

.about-text strong {
  color: var(--green-800);
}

.about-cards {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.info-card {
  background: var(--white);
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(26, 77, 46, 0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}

.info-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.info-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.info-card h3 {
  font-size: 1.15rem;
  color: var(--green-800);
  margin-bottom: 0.5rem;
}

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

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.step {
  background: var(--white);
  padding: 2rem 1.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(26, 77, 46, 0.06);
}

.step-num {
  display: block;
  font-family: "DM Serif Display", serif;
  font-size: 2rem;
  color: var(--green-200);
  margin-bottom: 1rem;
}

.step h3 {
  font-size: 1.1rem;
  color: var(--green-800);
  margin-bottom: 0.75rem;
}

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

/* Trees */
.tree-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.tree-card {
  background: var(--white);
  padding: 1.75rem;
  border-radius: var(--radius);
  border-left: 4px solid var(--green-500);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition);
}

.tree-card:hover {
  transform: translateY(-2px);
}

.tree-card h3 {
  font-size: 1.1rem;
  color: var(--green-800);
  margin-bottom: 0.5rem;
}

.tree-card .latin {
  display: block;
  font-family: "Outfit", sans-serif;
  font-size: 0.8rem;
  font-weight: 400;
  font-style: italic;
  color: var(--earth-400);
  margin-top: 0.15rem;
}

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

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.gallery-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(26, 77, 46, 0.06);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.gallery-card:focus-visible {
  outline: 3px solid var(--green-500);
  outline-offset: 2px;
}

.gallery-thumb {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--green-100);
}

.gallery-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

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

.gallery-body {
  padding: 1.25rem;
}

.gallery-body h3 {
  font-size: 1.05rem;
  color: var(--green-800);
  margin-bottom: 0.5rem;
}

.gallery-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.8rem;
  color: var(--earth-600);
  margin-bottom: 0.625rem;
}

.gallery-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.gallery-body p {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.gallery-map-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green-700);
  text-decoration: none;
  transition: color var(--transition);
}

.gallery-map-link:hover {
  color: var(--green-500);
  text-decoration: underline;
}

.lightbox-caption .gallery-map-link {
  color: var(--green-300);
  margin-top: 0.75rem;
}

.lightbox-caption .gallery-map-link:hover {
  color: var(--white);
}

.gallery-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 3rem 1.5rem;
  background: var(--white);
  border-radius: var(--radius);
  border: 2px dashed var(--green-200);
  line-height: 1.7;
}

.gallery-empty code {
  font-size: 0.85em;
  background: var(--green-50);
  padding: 0.15em 0.45em;
  border-radius: 4px;
  color: var(--green-800);
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(10, 31, 15, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.lightbox[hidden] {
  display: none;
}

.lightbox-content {
  max-width: 900px;
  width: 100%;
  margin: 0;
}

.lightbox-content img {
  width: 100%;
  max-height: 65vh;
  object-fit: contain;
  border-radius: var(--radius);
  background: var(--green-900);
}

.lightbox-caption {
  color: var(--white);
  padding: 1.25rem 0 0;
  text-align: center;
}

.lightbox-caption h3 {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.lightbox-meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  font-size: 0.9rem;
  color: var(--green-300);
  margin-bottom: 0.75rem;
}

.lightbox-caption p:last-child {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin-inline: auto;
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: none;
  border: none;
  color: var(--white);
  font-size: 2.5rem;
  line-height: 1;
  cursor: pointer;
  opacity: 0.8;
  transition: opacity var(--transition);
  padding: 0.25rem;
}

.lightbox-close:hover {
  opacity: 1;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.12);
  border: none;
  color: var(--white);
  font-size: 2.5rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.22);
}

.lightbox-prev {
  left: 1rem;
}

.lightbox-next {
  right: 1rem;
}

/* Donate */
.donate-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.donate-info h2 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  color: var(--green-900);
  margin-bottom: 1rem;
}

.donate-info > p {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.upi-id-box {
  background: var(--white);
  padding: 1.25rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.upi-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.upi-id-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.upi-id-row code {
  flex: 1;
  font-family: "Outfit", monospace;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--green-800);
  background: var(--green-50);
  padding: 0.625rem 1rem;
  border-radius: 8px;
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.625rem 1rem;
  background: var(--green-700);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
  white-space: nowrap;
}

.btn-copy:hover {
  background: var(--green-800);
}

.donate-qr-panel {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.amount-selector .amount-label {
  display: block;
  font-weight: 600;
  color: var(--green-800);
  margin-bottom: 0.75rem;
}

.amount-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.amount-btn {
  padding: 0.5rem 1rem;
  border: 2px solid var(--green-200);
  background: var(--white);
  color: var(--green-700);
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.amount-btn:hover:not(.active) {
  border-color: var(--green-500);
  background: var(--green-50);
}

.amount-btn.active,
.amount-btn.active:hover,
.amount-btn.active:focus-visible {
  background: var(--green-700);
  border-color: var(--green-700);
  color: var(--white);
}

.qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
  background: var(--green-50);
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

#qr-code {
  display: block;
  border-radius: 8px;
  background: var(--white);
  padding: 12px;
}

.qr-loading,
.qr-error {
  font-size: 0.9rem;
  text-align: center;
  padding: 2rem 1rem;
}

.qr-loading {
  color: var(--text-muted);
}

.qr-error {
  color: #b45309;
  background: #fffbeb;
  border-radius: var(--radius);
  width: 100%;
}

.qr-hint {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.paytm-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Footer */
.footer {
  background: var(--green-900);
  color: rgba(255, 255, 255, 0.85);
  padding-top: 3rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer-brand .logo-icon {
  font-size: 1.5rem;
}

.footer-brand strong {
  display: block;
  font-size: 1.1rem;
  margin: 0.5rem 0;
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.7;
  max-width: 320px;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--green-300);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.25rem 0;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.6;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--green-800);
  color: var(--white);
  padding: 0.875rem 1.5rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all 0.35s ease;
  z-index: 200;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
  .about-grid,
  .donate-wrapper {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--cream);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    transition: all var(--transition);
    pointer-events: none;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .steps,
  .tree-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .lightbox-nav {
    width: 40px;
    height: 40px;
    font-size: 2rem;
  }

  .lightbox-prev {
    left: 0.5rem;
  }

  .lightbox-next {
    right: 0.5rem;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .footer-content {
    flex-direction: column;
  }

  .footer-links {
    flex-wrap: wrap;
  }
}