/* ==========================================================================
   TechEnergy For Africa e.V. - Modern Design System (Dev Version)
   Brand Colors, Typography & Comprehensive Responsive Styles
   ========================================================================== */

:root {
  /* Official Brand Colors */
  --tefa-blue: #5B8AC2;
  --tefa-blue-dark: #4A7AB0;
  --tefa-blue-light: #7BA8D4;
  --tefa-blue-soft: rgba(91, 138, 194, 0.12);
  --tefa-orange: #F58220;
  --tefa-orange-dark: #D96E14;
  --tefa-orange-light: #FCEE21;
  --tefa-orange-soft: rgba(245, 130, 32, 0.12);
  --tefa-green: #00A651;
  --tefa-green-dark: #008742;
  --tefa-green-soft: rgba(0, 166, 81, 0.12);
  --tefa-red: #CE1126;
  --tefa-navy: #1E3A5F;
  --tefa-navy-dark: #0D1F33;
  --tefa-navy-light: #2D5A8A;

  /* Neutrals */
  --tefa-white: #FFFFFF;
  --tefa-off-white: #F8FAFC;
  --tefa-gray-50: #F8FAFC;
  --tefa-gray-100: #F1F5F9;
  --tefa-gray-200: #E2E8F0;
  --tefa-gray-300: #CBD5E1;
  --tefa-gray-400: #94A3B8;
  --tefa-gray-500: #64748B;
  --tefa-gray-600: #475569;
  --tefa-gray-700: #334155;
  --tefa-gray-800: #1E293B;
  --tefa-gray-900: #0F172A;

  /* Typography */
  --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-secondary: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 16px -2px rgba(15, 23, 42, 0.08), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 28px -4px rgba(15, 23, 42, 0.1), 0 4px 12px -2px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 36px -6px rgba(15, 23, 42, 0.14), 0 8px 16px -4px rgba(15, 23, 42, 0.06);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Spacing */
  --container-max: 1200px;
  --container-narrow: 840px;
  --header-height: 84px;

  /* Transitions */
  --transition-fast: 160ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 280ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   CSS Reset & Base
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: var(--font-secondary);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--tefa-gray-700);
  background-color: var(--tefa-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
  position: relative;
}

body.no-scroll {
  overflow: hidden;
  height: 100vh;
}

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

a {
  color: var(--tefa-blue);
  text-decoration: none;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

a:hover {
  color: var(--tefa-blue-dark);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 600;
  line-height: 1.25;
  color: var(--tefa-navy);
  overflow-wrap: break-word;
  word-break: break-word;
}

p {
  margin-bottom: 1rem;
  overflow-wrap: break-word;
}

p:last-child {
  margin-bottom: 0;
}

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font: inherit;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* Section Spacing */
.section {
  padding: 5rem 0;
  position: relative;
}

.section--alt {
  background-color: var(--tefa-gray-50);
}

.section--navy {
  background: linear-gradient(135deg, var(--tefa-navy-dark) 0%, var(--tefa-navy) 100%);
  color: var(--tefa-white);
}

.section--navy h1, .section--navy h2, .section--navy h3 {
  color: var(--tefa-white);
}

.section--blue {
  background: linear-gradient(135deg, var(--tefa-blue-dark) 0%, var(--tefa-blue) 100%);
  color: var(--tefa-white);
}

.section--blue h1, .section--blue h2, .section--blue h3 {
  color: var(--tefa-white);
}

.section__header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section__header h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section__header p {
  font-size: 1.125rem;
  color: var(--tefa-gray-600);
  line-height: 1.6;
}

.section--navy .section__header p,
.section--blue .section__header p {
  color: var(--tefa-gray-300);
}

/* Eyebrow badge */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-primary);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--tefa-orange);
  margin-bottom: 0.75rem;
}

.eyebrow--light {
  color: var(--tefa-orange-light);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  padding: 0.75rem 1.625rem;
  border-radius: var(--radius-full);
  font-family: var(--font-primary);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn:focus-visible {
  outline: 3px solid var(--tefa-blue-light);
  outline-offset: 2px;
}

.btn--primary {
  background-color: var(--tefa-orange);
  color: var(--tefa-white);
  border-color: var(--tefa-orange);
  box-shadow: 0 4px 14px rgba(245, 130, 32, 0.35);
}

.btn--primary:hover {
  background-color: var(--tefa-orange-dark);
  border-color: var(--tefa-orange-dark);
  color: var(--tefa-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 130, 32, 0.45);
}

.btn--secondary {
  background-color: transparent;
  color: var(--tefa-white);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn--secondary:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: var(--tefa-white);
  color: var(--tefa-white);
  transform: translateY(-2px);
}

.btn--outline-navy {
  background-color: transparent;
  color: var(--tefa-navy);
  border-color: var(--tefa-navy);
}

.btn--outline-navy:hover {
  background-color: var(--tefa-navy);
  color: var(--tefa-white);
  transform: translateY(-2px);
}

.btn--blue {
  background-color: var(--tefa-blue);
  color: var(--tefa-white);
  border-color: var(--tefa-blue);
  box-shadow: 0 4px 14px rgba(91, 138, 194, 0.35);
}

.btn--blue:hover {
  background-color: var(--tefa-blue-dark);
  border-color: var(--tefa-blue-dark);
  color: var(--tefa-white);
  transform: translateY(-2px);
}

.btn--white {
  background-color: var(--tefa-white);
  color: var(--tefa-navy);
  border-color: var(--tefa-white);
  box-shadow: var(--shadow-md);
}

.btn--white:hover {
  background-color: var(--tefa-gray-100);
  color: var(--tefa-orange);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--sm {
  padding: 0.5rem 1.125rem;
  font-size: 0.875rem;
}

.btn--lg {
  padding: 0.95rem 2.25rem;
  font-size: 1.0625rem;
}

.btn--block {
  width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  max-width: 100%;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--tefa-gray-200);
  transition: box-shadow var(--transition-base), background-color var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.98);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 1rem;
}

/* Brand Logo */
.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast);
}

.site-logo:hover img {
  transform: scale(1.02);
}

/* Desktop Navigation */
.main-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav-link {
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--tefa-gray-700);
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--tefa-blue);
  background-color: var(--tefa-blue-soft);
}

.nav-link.active {
  color: var(--tefa-navy);
  font-weight: 600;
  background-color: var(--tefa-gray-100);
}

/* Language Selector */
.lang-selector {
  display: inline-flex;
  align-items: center;
  background-color: var(--tefa-gray-100);
  border: 1px solid var(--tefa-gray-200);
  border-radius: var(--radius-full);
  padding: 0.25rem;
  gap: 0.125rem;
  flex-shrink: 0;
}

.lang-btn {
  font-family: var(--font-primary);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--tefa-gray-600);
  background: transparent;
  border: none;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  color: var(--tefa-navy);
}

.lang-btn.active {
  background-color: var(--tefa-white);
  color: var(--tefa-navy);
  box-shadow: var(--shadow-xs);
}

/* Header Actions (Tablet / Mobile) */
.header-actions {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

.lang-selector--mobile {
  padding: 0.15rem;
}

.lang-selector--mobile .lang-btn {
  padding: 0.25rem 0.5rem;
  font-size: 0.6875rem;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--tefa-gray-200);
  border-radius: var(--radius-md);
  padding: 10px;
  cursor: pointer;
  z-index: 1002;
}

.mobile-toggle span {
  width: 100%;
  height: 2px;
  background-color: var(--tefa-navy);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-toggle.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-toggle.open span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  width: 100vw;
  max-width: 100%;
  height: calc(100vh - var(--header-height));
  background-color: var(--tefa-white);
  z-index: 9999;
  padding: 1.5rem 1.5rem 3rem 1.5rem;
  flex-direction: column;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  box-shadow: var(--shadow-xl);
}

.mobile-drawer.open {
  display: flex !important;
  animation: drawerFadeIn 0.22s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes drawerFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 1025px) {
  .mobile-drawer,
  .mobile-drawer.open {
    display: none !important;
  }
}

.mobile-drawer .nav-links {
  flex-direction: column;
  align-items: stretch;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.mobile-drawer .nav-link {
  font-size: 1.125rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-md);
}

.mobile-drawer .lang-selector {
  align-self: flex-start;
  margin-bottom: 1.5rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding: 6rem 0 5rem 0;
  background: linear-gradient(135deg, var(--tefa-navy-dark) 0%, var(--tefa-navy) 100%);
  color: var(--tefa-white);
  overflow: hidden;
}

.hero--page {
  min-height: 48vh;
  padding: 5rem 0 4rem 0;
}

.hero__pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  background-image: 
    radial-gradient(circle at 15% 75%, rgba(0, 166, 81, 0.16) 0%, transparent 45%),
    radial-gradient(circle at 85% 25%, rgba(245, 130, 32, 0.18) 0%, transparent 45%),
    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: 0.9;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 820px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0, 166, 81, 0.15);
  border: 1px solid rgba(0, 166, 81, 0.45);
  color: #5eead4;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-family: var(--font-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  letter-spacing: 0.03em;
}

.hero__title {
  font-size: clamp(2.5rem, 5.5vw, 4.25rem);
  font-weight: 700;
  color: var(--tefa-white);
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

.hero__title span {
  background: linear-gradient(135deg, var(--tefa-orange) 0%, var(--tefa-orange-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__description {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  line-height: 1.7;
  color: var(--tefa-gray-300);
  margin-bottom: 2.5rem;
  max-width: 720px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero__stat-card {
  display: flex;
  flex-direction: column;
}

.hero__stat-value {
  font-family: var(--font-primary);
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  color: var(--tefa-orange);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.hero__stat-label {
  font-size: 0.875rem;
  color: var(--tefa-gray-300);
  line-height: 1.4;
}

/* ==========================================================================
   Grids & Cards
   ========================================================================== */
.grid {
  display: grid;
  gap: 2rem;
}

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

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

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

.grid--auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

/* Card Base */
.card {
  background-color: var(--tefa-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--tefa-gray-200);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--tefa-blue-light);
}

.card--accent-orange:hover {
  border-top: 4px solid var(--tefa-orange);
}

.card--accent-blue:hover {
  border-top: 4px solid var(--tefa-blue);
}

.card--accent-green:hover {
  border-top: 4px solid var(--tefa-green);
}

.card__body {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card__title {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--tefa-navy);
}

.card__text {
  color: var(--tefa-gray-600);
  font-size: 0.9688rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.card__footer {
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--tefa-gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Program Card */
.program-card {
  background-color: var(--tefa-white);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  border: 1px solid var(--tefa-gray-200);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  position: relative;
}

.program-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--tefa-blue), var(--tefa-orange));
  opacity: 0;
  transition: opacity var(--transition-base);
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
}

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

.program-card:hover::after {
  opacity: 1;
}

.program-card__icon {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: var(--tefa-blue-soft);
  color: var(--tefa-blue-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
}

/* Project Card */
.project-card {
  background-color: var(--tefa-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--tefa-gray-200);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--tefa-blue);
}

.project-card__image-wrap {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--tefa-gray-100);
}

.project-card__image-wrap::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 55%;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.72) 0%, rgba(15, 23, 42, 0.22) 65%, transparent 100%);
  pointer-events: none;
  z-index: 1;
}

.project-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.project-card:hover .project-card__image {
  transform: scale(1.05);
}

.project-card__badge-bar {
  position: absolute;
  top: 0.875rem;
  left: 0.875rem;
  right: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  z-index: 2;
}

.project-tag {
  font-family: var(--font-primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.project-tag--category {
  background: rgba(15, 23, 42, 0.82);
  color: var(--tefa-white);
}

.project-tag--active {
  background: rgba(0, 166, 81, 0.95);
  color: var(--tefa-white);
}

.project-tag--completed {
  background: rgba(91, 138, 194, 0.95);
  color: var(--tefa-white);
}

.project-tag--planned {
  background: rgba(245, 130, 32, 0.95);
  color: var(--tefa-white);
}

/* Projects Sub-Navigation */
.projects-subnav {
  background: linear-gradient(135deg, #F8FAFB 0%, #F0F4F8 100%);
  padding: 1rem 0;
  border-bottom: 1px solid var(--tefa-gray-200);
  margin-bottom: 2.5rem;
}

.projects-subnav__inner {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.projects-subnav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  color: var(--tefa-navy);
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-fast);
  background: var(--tefa-white);
  border: 1px solid var(--tefa-gray-200);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  line-height: 1.4;
}

.projects-subnav__link:hover {
  background: rgba(91, 138, 194, 0.12);
  color: var(--tefa-blue);
  border-color: var(--tefa-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Featured Project: Water Is Energy Banner */
.featured-project-banner {
  background: linear-gradient(135deg, #1E3A5F 0%, #2A5485 55%, #F58220 120%);
  border-radius: var(--radius-xl);
  padding: 3.5rem;
  margin-bottom: 3.5rem;
  color: var(--tefa-white);
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(30, 58, 95, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.featured-project-banner::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.featured-project__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.featured-project__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.2);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  margin-bottom: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.featured-project__title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--tefa-white);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.featured-project__desc {
  font-size: 1.125rem;
  line-height: 1.65;
  opacity: 0.95;
  margin-bottom: 2rem;
  max-width: 580px;
}

.featured-project__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.featured-project__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.stat-card-glass {
  background: rgba(255, 255, 255, 0.14);
  padding: 1.5rem 1.25rem;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.22);
  text-align: center;
  transition: transform var(--transition-fast);
}

.stat-card-glass:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.18);
}

.stat-card-glass__number {
  font-family: var(--font-primary);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--tefa-white);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.stat-card-glass__label {
  font-size: 0.8125rem;
  font-weight: 500;
  opacity: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.btn--white {
  background: var(--tefa-white);
  color: var(--tefa-navy);
  font-weight: 700;
}

.btn--white:hover {
  background: #f1f5f9;
  color: var(--tefa-blue);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.btn--outline-light {
  background: rgba(255, 255, 255, 0.15);
  color: var(--tefa-white);
  border: 2px solid rgba(255, 255, 255, 0.7);
  font-weight: 700;
}

.btn--outline-light:hover {
  background: var(--tefa-white);
  color: var(--tefa-navy);
  border-color: var(--tefa-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

@media (max-width: 900px) {
  .featured-project-banner {
    padding: 2.25rem 1.75rem;
  }
  .featured-project__grid {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }
}

/* Water Is Energy 2026 Focus Highlight Card */
.wie-focus-box {
  background: linear-gradient(135deg, #102A45 0%, #1E3A5F 50%, #2A5485 100%);
  border-radius: var(--radius-2xl);
  padding: 3.5rem 3rem;
  margin: 1.5rem 0 3.5rem 0;
  color: var(--tefa-white);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 45px rgba(16, 42, 69, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.wie-focus-box::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(245, 130, 32, 0.22) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

@media (max-width: 900px) {
  .wie-focus-box {
    padding: 2.25rem 1.5rem;
  }
}

.project-card__content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-card__location {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--tefa-gray-500);
  margin-bottom: 0.5rem;
}

.project-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--tefa-navy);
}

.project-card__desc {
  font-size: 0.9375rem;
  color: var(--tefa-gray-600);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* Program Row Detail (Alternating) */
.program-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--tefa-gray-200);
}

.program-row:last-child {
  border-bottom: none;
}

.program-row.reverse {
  direction: rtl;
}

.program-row.reverse > * {
  direction: ltr;
}

.program-row__media {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background-color: var(--tefa-gray-100);
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.program-row__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.program-row__content h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.program-row__content .lead {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--tefa-gray-600);
  margin-bottom: 1.5rem;
}

.feature-list {
  margin: 1.5rem 0 2rem 0;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  color: var(--tefa-gray-700);
  font-size: 0.9688rem;
}

.feature-item svg {
  color: var(--tefa-green);
  flex-shrink: 0;
  margin-top: 3px;
}

/* ==========================================================================
   Filters
   ========================================================================== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.625rem;
  margin-bottom: 3rem;
}

.filter-btn {
  font-family: var(--font-primary);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--tefa-gray-600);
  background: var(--tefa-white);
  border: 1.5px solid var(--tefa-gray-300);
  padding: 0.625rem 1.375rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--tefa-blue);
  color: var(--tefa-blue);
}

.filter-btn.active {
  background-color: var(--tefa-blue);
  border-color: var(--tefa-blue);
  color: var(--tefa-white);
  box-shadow: 0 4px 12px rgba(91, 138, 194, 0.3);
}

/* ==========================================================================
   Donation Component
   ========================================================================== */
.donation-box {
  background-color: var(--tefa-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--tefa-gray-200);
  box-shadow: var(--shadow-xl);
  padding: 3rem;
  max-width: 680px;
  margin: 0 auto;
}

.amount-chips {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.amount-chip {
  font-family: var(--font-primary);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--tefa-navy);
  background: var(--tefa-gray-100);
  border: 2px solid transparent;
  padding: 0.875rem 0.5rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
}

.amount-chip:hover {
  background-color: var(--tefa-blue-soft);
  color: var(--tefa-blue);
}

.amount-chip.active {
  background-color: var(--tefa-blue);
  border-color: var(--tefa-blue);
  color: var(--tefa-white);
  box-shadow: 0 4px 12px rgba(91, 138, 194, 0.35);
}

.custom-amount-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.custom-amount-input {
  font-family: var(--font-primary);
  font-size: 1.25rem;
  font-weight: 600;
  padding: 0.625rem 1rem;
  border: 2px solid var(--tefa-gray-300);
  border-radius: var(--radius-md);
  width: 140px;
  text-align: center;
  color: var(--tefa-navy);
  transition: border-color var(--transition-fast);
}

.custom-amount-input:focus {
  outline: none;
  border-color: var(--tefa-blue);
}

.donation-toggle-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1rem;
  background-color: var(--tefa-gray-50);
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
  cursor: pointer;
}

.donation-summary-banner {
  background: linear-gradient(135deg, var(--tefa-navy) 0%, var(--tefa-navy-dark) 100%);
  color: var(--tefa-white);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  text-align: center;
  margin-bottom: 2.5rem;
}

.donation-summary-banner h4 {
  color: var(--tefa-white);
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.donation-summary-banner p {
  color: var(--tefa-orange-light);
  font-weight: 600;
  font-size: 1.125rem;
}

.bank-card {
  background-color: var(--tefa-gray-50);
  border: 1px solid var(--tefa-gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2.5rem;
}

.bank-card__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--tefa-gray-200);
  font-size: 0.9375rem;
}

.bank-card__row:last-child {
  border-bottom: none;
}

.bank-card__label {
  color: var(--tefa-gray-500);
  font-weight: 500;
}

.bank-card__value {
  color: var(--tefa-navy);
  font-weight: 600;
  font-family: monospace, sans-serif;
  text-align: right;
  word-break: break-all;
}

.copy-btn {
  background: transparent;
  border: none;
  color: var(--tefa-blue);
  cursor: pointer;
  margin-left: 0.5rem;
  font-size: 0.8125rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.copy-btn:hover {
  background: var(--tefa-blue-soft);
}

.payment-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* ==========================================================================
   Forms
   ========================================================================== */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-family: var(--font-primary);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--tefa-navy);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.875rem 1.125rem;
  border: 1.5px solid var(--tefa-gray-300);
  border-radius: var(--radius-md);
  font-size: 1rem;
  color: var(--tefa-gray-800);
  background-color: var(--tefa-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--tefa-blue);
  box-shadow: 0 0 0 3px var(--tefa-blue-soft);
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

/* --- Form Validation States --- */
.form-control.is-invalid {
  border-color: #e53e3e !important;
  background-color: #fff5f5 !important;
  box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.18) !important;
  animation: fieldShake 0.35s ease-in-out;
}

@keyframes fieldShake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-4px); }
  40%, 80% { transform: translateX(4px); }
}

.form-error-msg {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: #c53030;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-top: 0.375rem;
  line-height: 1.4;
  animation: fadeIn 0.2s ease-out;
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  margin-top: 0.5rem;
  cursor: pointer;
}

.form-check input[type="checkbox"] {
  width: 1.2rem;
  height: 1.2rem;
  margin-top: 0.15rem;
  cursor: pointer;
  accent-color: var(--tefa-orange);
  flex-shrink: 0;
}

.form-check.is-invalid {
  padding: 0.65rem;
  border-radius: var(--radius-sm);
  background-color: #fff5f5;
  border: 1.5px solid #e53e3e;
  animation: fieldShake 0.35s ease-in-out;
}

.notice-box {
  background-color: rgba(91, 138, 194, 0.08);
  border-left: 4px solid var(--tefa-blue);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
  color: var(--tefa-gray-700);
  font-size: 0.9375rem;
}

.notice-box--warning {
  background-color: rgba(245, 130, 32, 0.08);
  border-left-color: var(--tefa-orange);
}

/* ==========================================================================
   Modal & Gallery
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(13, 31, 51, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  position: relative;
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  background-color: var(--tefa-navy-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
}

.modal-image-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: black;
  max-height: 70vh;
}

.modal-image-wrap img {
  max-height: 70vh;
  max-width: 100%;
  object-fit: contain;
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: var(--tefa-white);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
  z-index: 10;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.4);
}

.modal-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.5);
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.modal-nav:hover {
  background: rgba(0, 0, 0, 0.8);
}

.modal-nav--prev { left: 1rem; }
.modal-nav--next { right: 1rem; }

.modal-footer {
  padding: 1rem 1.5rem;
  background-color: var(--tefa-navy-dark);
  color: var(--tefa-white);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  background-color: var(--tefa-gray-100);
}

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

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

.gallery-item__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.25rem;
  background: linear-gradient(to top, rgba(13, 31, 51, 0.88), transparent);
  color: var(--tefa-white);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.gallery-item:hover .gallery-item__overlay {
  transform: translateY(0);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: linear-gradient(135deg, var(--tefa-navy-dark) 0%, var(--tefa-navy) 100%);
  color: var(--tefa-gray-300);
  padding: 5rem 0 2rem 0;
  border-top: 4px solid var(--tefa-orange);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand__logo-wrap {
  display: inline-block;
  background: var(--tefa-white);
  padding: 0.625rem 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.footer-brand__logo {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.footer-brand p {
  line-height: 1.7;
  color: var(--tefa-gray-300);
  margin-bottom: 1.5rem;
  max-width: 340px;
}

.footer-title {
  font-family: var(--font-primary);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--tefa-white);
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--tefa-gray-300);
  transition: color var(--transition-fast), transform var(--transition-fast);
  display: inline-block;
}

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

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.875rem;
  color: var(--tefa-gray-300);
  font-size: 0.9375rem;
}

.footer-contact a {
  color: var(--tefa-gray-300);
}

.footer-contact a:hover {
  color: var(--tefa-orange);
}

.social-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tefa-white);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--tefa-orange);
  color: var(--tefa-white);
  transform: translateY(-3px);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--tefa-gray-400);
}

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

.footer-bottom-links a {
  color: var(--tefa-gray-400);
}

.footer-bottom-links a:hover {
  color: var(--tefa-white);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  :root {
    --header-height: 72px;
  }

  .main-nav {
    display: none;
  }

  .header-actions {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
  
  .program-row {
    gap: 2.5rem;
  }

  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
  }
}

@media (max-width: 768px) {
  .hero__title {
    font-size: clamp(1.875rem, 7vw, 2.75rem);
  }

  .grid--2,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .wie-focus-box {
    padding: 2rem 1.25rem;
  }

  .program-row {
    grid-template-columns: 1fr;
    padding: 2.5rem 0;
  }

  .program-row.reverse {
    direction: ltr;
  }

  .hero {
    min-height: auto;
    padding: 4.5rem 0 3.5rem 0;
  }

  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 2.5rem;
    padding-top: 2rem;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__actions .btn {
    width: 100%;
  }

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

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

  .donation-box {
    padding: 1.75rem 1.25rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 680px) {
  .grid--3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --header-height: 68px;
  }

  .site-logo img {
    height: 42px;
  }

  .container {
    padding-left: 1.125rem;
    padding-right: 1.125rem;
  }

  .hero__title {
    font-size: 1.75rem;
  }

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

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

  .bank-card__row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .section {
    padding: 3.5rem 0;
  }
}