@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

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

:root {
  --blue-900: #0c1929;
  --blue-800: #122a46;
  --blue-700: #1a3a5c;
  --blue-600: #1976d2;
  --blue-500: #2196f3;
  --blue-400: #42a5f5;
  --blue-300: #90caf9;
  --blue-100: #e3f2fd;
  --teal-600: #00897b;
  --teal-500: #009688;
  --teal-400: #26a69a;
  --teal-100: #e0f2f1;
  --green-600: #388e3c;
  --green-100: #e8f5e9;
  --amber-600: #f57c00;
  --amber-100: #fff3e0;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #eeeeee;
  --gray-300: #e0e0e0;
  --gray-400: #bdbdbd;
  --gray-500: #9e9e9e;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;
  --white: #ffffff;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1200px;
  --section-padding: 100px 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  color: var(--gray-800);
  line-height: 1.6;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== NAVIGATION ===== */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}

.site-nav.scrolled {
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--blue-900);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--gray-600);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
  letter-spacing: 0.01em;
}

.nav-links a:hover {
  color: var(--blue-600);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gray-800);
  margin: 5px 0;
  transition: 0.3s;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(165deg, var(--blue-900) 0%, var(--blue-800) 40%, var(--blue-700) 100%);
  position: relative;
  overflow: hidden;
  padding-top: 64px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(33, 150, 243, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 60%;
  height: 120%;
  background: radial-gradient(ellipse, rgba(0, 150, 136, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: 80px 0;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 0.8125rem;
  color: var(--blue-300);
  font-weight: 500;
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
}

.hero-label .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal-400);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--blue-400), var(--teal-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
  max-width: 600px;
  margin-bottom: 48px;
  font-weight: 300;
}

.hero-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: left;
}

.hero-stat-number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-stat-label {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
  font-weight: 400;
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===== SECTION COMMON ===== */
.section {
  padding: var(--section-padding);
}

.section-header {
  margin-bottom: 64px;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--blue-600);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-description {
  font-size: 1.125rem;
  color: var(--gray-600);
  max-width: 640px;
  line-height: 1.7;
}

/* ===== ABOUT ===== */
.about {
  background: var(--gray-50);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-text p {
  font-size: 1.0625rem;
  color: var(--gray-700);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-text p:first-of-type {
  font-size: 1.1875rem;
  color: var(--gray-800);
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.highlight-card {
  background: var(--white);
  border-radius: 16px;
  padding: 28px;
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
}

.highlight-card:hover {
  border-color: var(--blue-300);
  box-shadow: 0 8px 30px rgba(25, 118, 210, 0.08);
  transform: translateY(-2px);
}

.highlight-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.highlight-card-icon.blue { background: var(--blue-100); }
.highlight-card-icon.teal { background: var(--teal-100); }
.highlight-card-icon.green { background: var(--green-100); }
.highlight-card-icon.amber { background: var(--amber-100); }

.highlight-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.highlight-card p {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ===== PLATFORM ===== */
.platform-intro {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  margin-bottom: 80px;
  align-items: center;
}

.platform-intro-text {
  font-size: 1.0625rem;
  color: var(--gray-700);
  line-height: 1.8;
}

.platform-intro-text p {
  margin-bottom: 16px;
}

.platform-badge {
  background: linear-gradient(135deg, var(--blue-100), var(--teal-100));
  border-radius: 20px;
  padding: 36px;
  text-align: center;
}

.platform-badge img {
  max-width: 180px;
  margin-bottom: 16px;
}

.platform-badge-text {
  font-size: 0.9375rem;
  color: var(--gray-700);
  font-weight: 500;
}

/* ===== CAPABILITY GRID ===== */
.capabilities {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.capability-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  padding: 36px;
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}

.capability-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue-500), var(--teal-500));
  opacity: 0;
  transition: opacity 0.35s;
}

.capability-card:hover {
  border-color: transparent;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.capability-card:hover::before {
  opacity: 1;
}

.capability-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
  background: var(--blue-100);
}

.capability-card:nth-child(2) .capability-icon { background: var(--teal-100); }
.capability-card:nth-child(3) .capability-icon { background: var(--green-100); }
.capability-card:nth-child(4) .capability-icon { background: var(--amber-100); }
.capability-card:nth-child(5) .capability-icon { background: #fce4ec; }
.capability-card:nth-child(6) .capability-icon { background: #f3e5f5; }

.capability-card h3 {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.capability-card > p {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list li {
  font-size: 0.8125rem;
  color: var(--gray-700);
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-500);
}

.feature-list .year {
  color: var(--gray-500);
  font-size: 0.75rem;
  font-weight: 500;
}

/* ===== TIMELINE ===== */
.timeline-section {
  background: var(--gray-50);
}

.timeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  position: relative;
}

.timeline-grid::before {
  content: '';
  position: absolute;
  left: 140px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gray-300);
}

.timeline-year-group {
  margin-bottom: 48px;
}

.timeline-year {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--blue-600);
  margin-bottom: 24px;
  position: relative;
  padding-left: 180px;
}

.timeline-year::before {
  content: '';
  position: absolute;
  left: 134px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--blue-600);
  border: 3px solid var(--white);
  box-shadow: 0 0 0 3px var(--blue-600);
}

.timeline-entries {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.timeline-entry {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 60px;
  padding-left: 0;
  align-items: start;
}

.timeline-date {
  font-size: 0.8125rem;
  color: var(--gray-500);
  font-weight: 500;
  text-align: right;
  padding-top: 12px;
}

.timeline-content {
  background: var(--white);
  border-radius: 12px;
  padding: 20px 24px;
  border: 1px solid var(--gray-200);
  position: relative;
  transition: all 0.25s ease;
}

.timeline-content:hover {
  border-color: var(--blue-300);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.timeline-content::before {
  content: '';
  position: absolute;
  left: -31px;
  top: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue-400);
  border: 2px solid var(--white);
}

.timeline-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.timeline-badge.added {
  background: var(--green-100);
  color: var(--green-600);
}

.timeline-badge.changed {
  background: var(--blue-100);
  color: var(--blue-600);
}

.timeline-content h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.timeline-content p {
  font-size: 0.8125rem;
  color: var(--gray-600);
  line-height: 1.5;
}

.timeline-platform-tag {
  display: inline-block;
  font-size: 0.6875rem;
  color: var(--gray-500);
  background: var(--gray-100);
  padding: 1px 6px;
  border-radius: 3px;
  margin-left: 8px;
  font-weight: 500;
}

/* ===== SDG/WASH CREDENTIALS ===== */
.credentials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.credential-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  padding: 40px;
  transition: all 0.3s ease;
}

.credential-card:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.credential-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 16px;
}

.credential-card p {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 12px;
}

.credential-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.credential-card ul li {
  font-size: 0.875rem;
  color: var(--gray-700);
  padding-left: 20px;
  position: relative;
}

.credential-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal-500);
}

/* ===== PROJECTS ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.project-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.35s ease;
  text-decoration: none;
  color: inherit;
  display: block;
}

.project-card:hover {
  border-color: transparent;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
  transform: translateY(-6px);
}

.project-card-image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  display: block;
}

.project-card-body {
  padding: 24px;
}

.project-card-body h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.project-card-body p {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--blue-900);
  padding: 64px 0;
  color: rgba(255, 255, 255, 0.6);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .platform-intro {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

@media (max-width: 768px) {
  :root {
    --section-padding: 64px 0;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero-content {
    padding: 48px 0;
  }

  .hero-stats {
    gap: 32px;
  }

  .hero-stat-number {
    font-size: 1.75rem;
  }

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

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

  .timeline-grid::before {
    left: 20px;
  }

  .timeline-year {
    padding-left: 60px;
  }

  .timeline-year::before {
    left: 14px;
  }

  .timeline-entry {
    grid-template-columns: 1fr;
    gap: 0;
    padding-left: 60px;
  }

  .timeline-date {
    text-align: left;
    padding-top: 0;
    margin-bottom: 4px;
  }

  .timeline-content::before {
    left: -41px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 32px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

  .section-title {
    font-size: 1.5rem;
  }
}

/* ===== SCROLL ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== SHOW MORE TOGGLE ===== */
.timeline-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue-600);
  cursor: pointer;
  transition: all 0.25s ease;
  margin-top: 32px;
  margin-left: 180px;
}

.timeline-toggle:hover {
  background: var(--blue-100);
  border-color: var(--blue-300);
}

.timeline-hidden {
  display: none;
}

.timeline-hidden.visible {
  display: block;
}

@media (max-width: 768px) {
  .timeline-toggle {
    margin-left: 60px;
  }
}