/* ============================================================
   RADHE KRUSHNA GAU SEVA — Design System & Styles
   ============================================================ */

/* ── 1. Design Tokens ────────────────────────────────────── */
:root {
  /* Primary — Deep Forest Green (from logo) */
  --color-primary: #2D5F2D;
  --color-primary-light: #4A8B4A;
  --color-primary-dark: #1A3A1A;
  --color-primary-rgb: 45, 95, 45;

  /* Accent — Saffron / Golden */
  --color-accent: #E8A435;
  --color-accent-warm: #FF9933;
  --color-accent-light: #FFC964;
  --color-accent-rgb: 232, 164, 53;

  /* Backgrounds */
  --color-bg-light: #FDF8F0;
  --color-bg-cream: #F5EFE0;
  --color-bg-white: #FFFFFF;

  /* Text */
  --color-text: #1A2E1A;
  --color-text-light: #5A6B5A;
  --color-text-muted: #8A9A8A;
  --color-text-white: #FFFFFF;

  /* Utility */
  --color-border: #D4DDD4;
  --color-shadow: rgba(26, 58, 26, 0.12);
  --color-overlay: rgba(26, 58, 26, 0.7);

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', system-ui, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Borders */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 50%;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-sm: 0 2px 8px var(--color-shadow);
  --shadow-md: 0 4px 16px var(--color-shadow);
  --shadow-lg: 0 8px 32px var(--color-shadow);
  --shadow-xl: 0 16px 48px var(--color-shadow);

  /* Layout */
  --max-width: 1200px;
  --navbar-height: 80px;
}

/* ── 2. Base Reset & Foundations ─────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--navbar-height);
  font-size: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg-light);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button {
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
}

/* ── 3. Utility Classes ──────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

.section-padding {
  padding-block: var(--space-4xl);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-block-end: var(--space-md);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 2rem;
  height: 2px;
  background: var(--color-accent);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 1rem + 3vw, 2.75rem);
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.2;
  margin-block-end: var(--space-lg);
  text-wrap: balance;
}

.section-subtitle {
  font-size: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  color: var(--color-text-light);
  max-width: 600px;
  line-height: 1.7;
}

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

.mx-auto {
  margin-inline: auto;
}

/* Scroll Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ── 4. NAVBAR ───────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  transition: all var(--transition-base);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  height: 68px;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  z-index: 1001;
}

.nav-logo img {
  height: 55px;
  width: 55px;
  border-radius: var(--radius-full);
  object-fit: cover;
  transition: height var(--transition-base), width var(--transition-base);
}

.navbar.scrolled .nav-logo img {
  height: 45px;
  width: 45px;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
}

.nav-logo-text .brand-name {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-white);
  line-height: 1.2;
  transition: color var(--transition-base);
}

.navbar.scrolled .nav-logo-text .brand-name {
  color: var(--color-primary-dark);
}

.nav-logo-text .brand-tagline {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
  transition: color var(--transition-base);
}

.navbar.scrolled .nav-logo-text .brand-tagline {
  color: var(--color-text-light);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-white);
  position: relative;
  padding-block: var(--space-xs);
  transition: color var(--transition-base);
}

.navbar.scrolled .nav-links a {
  color: var(--color-text);
}

.nav-links a:not(.btn-donate):hover {
  color: var(--color-accent);
}

.nav-links a:not(.btn-donate)::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-links a:not(.btn-donate):hover::after {
  width: 100%;
}

.btn-donate {
  background: linear-gradient(135deg, var(--color-accent-warm), var(--color-accent));
  color: var(--color-text-white) !important;
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(var(--color-accent-rgb), 0.4);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-donate:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(var(--color-accent-rgb), 0.5);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: var(--space-sm);
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--color-text-white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar.scrolled .hamburger span {
  background: var(--color-primary-dark);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* ── 5. HERO SECTION ─────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('images/hero-bg.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: -2;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(var(--color-primary-rgb), 0.6) 0%,
    rgba(var(--color-primary-rgb), 0.75) 50%,
    rgba(var(--color-primary-rgb), 0.85) 100%
  );
  z-index: -1;
}

.hero-content {
  padding: var(--space-3xl) var(--space-lg);
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-xl);
  color: var(--color-accent-light);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-block-end: var(--space-xl);
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.25rem, 1.5rem + 5vw, 4rem);
  font-weight: 700;
  color: var(--color-text-white);
  line-height: 1.15;
  margin-block-end: var(--space-lg);
  text-wrap: balance;
}

.hero h1 span {
  color: var(--color-accent-light);
}

.hero-text {
  font-size: clamp(1rem, 0.9rem + 0.5vw, 1.25rem);
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin-inline: auto;
  margin-block-end: var(--space-2xl);
  line-height: 1.8;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: linear-gradient(135deg, var(--color-accent-warm), var(--color-accent));
  color: var(--color-text-white);
  padding: 1rem 2.25rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1.0625rem;
  box-shadow: 0 8px 25px rgba(var(--color-accent-rgb), 0.4);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.2));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(var(--color-accent-rgb), 0.5);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.4);
  color: var(--color-text-white);
  padding: 0.9375rem 2.125rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1.0625rem;
  transition: all var(--transition-base);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-2px);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: bounce 2s infinite;
}

.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 12px;
  position: relative;
}

.scroll-mouse::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 8px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 2px;
  animation: scrollDown 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

@keyframes scrollDown {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* ── 6. ABOUT SECTION ────────────────────────────────────── */
.about {
  background: var(--color-bg-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.about-image:hover img {
  transform: scale(1.03);
}

.about-image-accent {
  position: absolute;
  bottom: -1rem;
  right: -1rem;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-warm));
  border-radius: var(--radius-xl);
  z-index: -1;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.about-quote {
  background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.05), rgba(var(--color-accent-rgb), 0.08));
  border-left: 4px solid var(--color-accent);
  padding: var(--space-lg) var(--space-xl);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-primary);
  line-height: 1.6;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast);
}

.about-feature:hover {
  transform: translateY(-2px);
}

.about-feature-icon {
  font-size: 1.5rem;
  line-height: 1;
  flex-shrink: 0;
}

.about-feature h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-block-end: 2px;
}

.about-feature p {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* ── 7. OUR SEVA (WORK) ──────────────────────────────────── */
.seva {
  background: var(--color-bg-light);
  position: relative;
}

.seva-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.seva-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.seva-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: left;
}

.seva-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.seva-card:hover::before {
  transform: scaleX(1);
}

.seva-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  margin-inline: auto;
  margin-block-end: var(--space-lg);
  background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.1), rgba(var(--color-accent-rgb), 0.15));
  border-radius: var(--radius-lg);
  font-size: 2rem;
  transition: transform var(--transition-base), background var(--transition-base);
}

.seva-card:hover .seva-icon {
  transform: scale(1.1) rotate(5deg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
}

.seva-card:hover .seva-icon span {
  filter: grayscale(1) brightness(10);
}

.seva-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-block-end: var(--space-sm);
}

.seva-card p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ── 8. IMPACT STATISTICS ────────────────────────────────── */
.impact {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  position: relative;
  overflow: hidden;
}

.impact::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 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='0.03'%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");
  opacity: 0.5;
}

.impact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  position: relative;
  z-index: 1;
}

.impact-item {
  text-align: center;
  padding: var(--space-xl);
}

.impact-icon {
  font-size: 2.5rem;
  margin-block-end: var(--space-md);
  display: block;
}

.impact-number {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 1.5rem + 3vw, 3.5rem);
  font-weight: 700;
  color: var(--color-accent-light);
  line-height: 1;
  margin-block-end: var(--space-sm);
}

.impact-number span {
  font-size: inherit;
  color: inherit;
}

.impact-label {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── 9. GALLERY ──────────────────────────────────────────── */
.gallery {
  background: var(--color-bg-white);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4 / 3;
}

.gallery-item:first-child {
  grid-column: span 2;
  aspect-ratio: 16 / 9;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(var(--color-primary-rgb), 0.8) 100%);
  opacity: 0;
  display: flex;
  align-items: flex-end;
  padding: var(--space-lg);
  transition: opacity var(--transition-base);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay p {
  color: var(--color-text-white);
  font-weight: 600;
  font-size: 1rem;
}

/* ── 10. DONATE SECTION ──────────────────────────────────── */
.donate {
  background: linear-gradient(180deg, var(--color-bg-cream) 0%, var(--color-bg-light) 100%);
  position: relative;
}

.donate-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3xl);
}

.donate-info h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 1rem + 3vw, 2.5rem);
  color: var(--color-primary-dark);
  margin-block-end: var(--space-lg);
  text-wrap: balance;
}

.donate-info p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-block-end: var(--space-lg);
}

.donate-benefits {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.donate-benefit {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.donate-benefit-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.1), rgba(var(--color-accent-rgb), 0.1));
  border-radius: var(--radius-sm);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.donate-benefit h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.donate-benefit p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 0;
}

/* Donation Form Card */
.donate-form-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.donate-form-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  text-align: center;
  margin-block-end: var(--space-xl);
}

.amount-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
  margin-block-end: var(--space-lg);
}

.amount-btn {
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-white);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.amount-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.amount-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-white);
  box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.3);
}

.custom-amount-wrapper {
  margin-block-end: var(--space-lg);
}

.custom-amount-wrapper label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-light);
  margin-block-end: var(--space-xs);
}

.custom-amount-input {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition-fast);
  background: var(--color-bg-light);
}

.custom-amount-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

.donor-fields {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-block-end: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

.form-group label .optional {
  color: var(--color-text-muted);
  font-weight: 400;
}

.form-group input {
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition-fast);
  background: var(--color-bg-light);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

.btn-pay {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--color-accent-warm), var(--color-accent));
  color: var(--color-text-white);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1.125rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  box-shadow: 0 6px 20px rgba(var(--color-accent-rgb), 0.35);
  transition: all var(--transition-base);
}

.btn-pay:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(var(--color-accent-rgb), 0.45);
}

.btn-pay:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.secure-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  margin-block-start: var(--space-md);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ── 11. TESTIMONIALS ────────────────────────────────────── */
.testimonials {
  background: var(--color-bg-white);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.testimonial-card {
  background: var(--color-bg-light);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  position: relative;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

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

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: var(--space-md);
  right: var(--space-xl);
  font-family: var(--font-heading);
  font-size: 5rem;
  color: rgba(var(--color-accent-rgb), 0.15);
  line-height: 1;
}

.testimonial-text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-block-end: var(--space-lg);
  font-style: italic;
  position: relative;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-white);
  font-weight: 700;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.testimonial-info h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.testimonial-info p {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* ── 12. FOOTER ──────────────────────────────────────────── */
.footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding-block: var(--space-4xl) var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  margin-block-end: var(--space-3xl);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.footer-brand .footer-logo img {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.footer-brand .footer-logo h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--color-text-white);
}

.footer-brand p {
  font-size: 0.9375rem;
  line-height: 1.7;
  max-width: 350px;
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-white);
  transition: all var(--transition-fast);
  font-size: 1.125rem;
}

.footer-social a:hover {
  background: var(--color-accent);
  transform: translateY(-3px);
}

.footer-section h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-white);
  margin-block-end: var(--space-lg);
  position: relative;
  padding-block-end: var(--space-sm);
}

.footer-section h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 2rem;
  height: 2px;
  background: var(--color-accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.footer-links a:hover {
  color: var(--color-accent);
  transform: translateX(4px);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-block-end: var(--space-md);
  font-size: 0.9375rem;
}

.footer-contact-item .icon {
  font-size: 1.25rem;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-block-start: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ── 13. BACK TO TOP ─────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: var(--color-text-white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 999;
  cursor: pointer;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary-light);
  transform: translateY(-4px);
}

/* ── 14. SUCCESS MODAL ───────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: var(--space-lg);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--color-bg-white);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  text-align: center;
  max-width: 420px;
  width: 100%;
  transform: scale(0.9);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-xl);
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

.modal-icon {
  font-size: 4rem;
  margin-block-end: var(--space-lg);
  display: block;
}

.modal-content h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-primary-dark);
  margin-block-end: var(--space-md);
}

.modal-content p {
  color: var(--color-text-light);
  line-height: 1.7;
  margin-block-end: var(--space-xl);
}

.modal-close-btn {
  padding: var(--space-md) var(--space-2xl);
  background: var(--color-primary);
  color: var(--color-text-white);
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: background var(--transition-fast);
}

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

/* ── 15. RESPONSIVE DESIGN ───────────────────────────────── */

/* Tablet (768px+) */
@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
  }

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

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

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

  .gallery-item:first-child {
    grid-column: span 2;
  }

  .donate-wrapper {
    grid-template-columns: 1fr 1fr;
    align-items: flex-start;
  }

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

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
  .seva-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .gallery-item:first-child {
    grid-column: span 2;
    grid-row: span 2;
    aspect-ratio: auto;
  }

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

/* Mobile nav */
@media (max-width: 767px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100dvh;
    background: var(--color-primary-dark);
    flex-direction: column;
    justify-content: center;
    gap: var(--space-xl);
    padding: var(--space-2xl);
    transition: right var(--transition-base);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.3);
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    color: var(--color-text-white);
    font-size: 1.125rem;
  }

  .navbar.scrolled .nav-links a {
    color: var(--color-text-white);
  }

  .btn-donate {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

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

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

/* Small mobile */
@media (max-width: 380px) {
  .container {
    padding-inline: var(--space-md);
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .donate-form-card {
    padding: var(--space-lg);
  }
}