* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  background-color: #f3f4f7;
  color: #24324a;
}

body {
  position: relative;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  display: block;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* =========================
   HEADER / NAV
========================= */

.site-header {
  background: #0b2a4a;
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.nav-wrap {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.4px;
}

.main-nav {
  display: flex;
  gap: 42px;
}

.main-nav a {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  padding: 28px 0 16px;
  position: relative;
  display: inline-block;
}

.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 4px;
  background: #4d87d8;
  border-radius: 3px;
}

/* =========================
   HERO
========================= */

.hero-section {
  padding: 30px 0 20px;
  background:
    linear-gradient(
      rgba(255, 255, 255, 0.62),
      rgba(255, 255, 255, 0.62)
    ),
    url("images/main-background.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-grid {
  display: grid;
  grid-template-columns: 50% 50%;
  gap: 30px;
  align-items: stretch;
}

.hero-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 20px;
  height: 560px;
}

.hero-card {
  position: relative;
  overflow: hidden;
  border: 1px solid #d7deea;
  box-shadow: 0 3px 10px rgba(30, 44, 70, 0.08);
  background: #dfe7f2;
  min-height: 0;
}

.hero-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.4) 0%,
    rgba(0, 0, 0, 0.4) 100%
  );
}

.hero-label {
  position: absolute;
  z-index: 2;
  left: 20px;
  top: 18px;
  right: 18px;
  color: #ffffff;
}

.hero-label h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.25;
}

.hero-label p {
  margin: 10px 0 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.95);
}

.hero-text {
  height: 560px;
  background: #ffffff;
  padding: 40px 36px;
  border: 1px solid #dfe5ef;
  box-shadow: 0 3px 10px rgba(30, 44, 70, 0.05);
}

.hero-text h1 {
  margin: 0;
  font-size: 54px;
  line-height: 1.15;
  color: #253e66;
  font-weight: 700;
}

.hero-divider {
  width: 100%;
  height: 2px;
  background: #d2d8e4;
  margin: 26px 0 24px;
}

.hero-text h2 {
  margin: 0;
  font-size: 27px;
  color: #153964;
  font-weight: 800;
  line-height: 1.35;
}

.hero-desc {
  margin-top: 30px;
  font-size: 18px;
  line-height: 1.9;
  color: #546277;
  width: 90%;
}

.hero-buttons {
  margin-top: 34px;
  display: flex;
  gap: 12px;
  flex-wrap: nowrap;
}

.btn {
  display: inline-block;
  min-width: 95px;
  text-align: center;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 4px;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(28, 49, 86, 0.12);
}

.btn-blue {
  background: #103a6d;
}

.btn-red {
  background: #d24b39;
}

/* =========================
   SECTIONS
========================= */

.section-white {
  background: rgba(255, 255, 255, 0.58);
  padding: 46px 0;
}

.section-gray {
  background: rgba(243, 244, 247, 0.42);
  padding: 46px 0;
}

.section-title-left {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 34px;
}

.section-title-left h2,
.section-title-center h2 {
  margin: 0;
  color: #143a69;
  font-size: 26px;
  font-weight: 800;
}

.section-title-left .line,
.section-title-center .line {
  height: 1px;
  background: #cfd6e1;
  flex: 1;
}

.section-title-center {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 34px;
}

.mission-content p {
  margin: 0 0 16px;
  font-size: 18px;
  line-height: 1.95;
  color: #566478;
}

/* =========================
   PROGRAM CARDS
========================= */

.program-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.program-card {
  background: #ffffff;
  border: 1px solid #e1e6ef;
  box-shadow: 0 3px 10px rgba(29, 44, 72, 0.05);
  border-radius: 10px;
  padding: 26px 22px 28px;
  text-align: center;
}

.program-thumb {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  margin: 0 auto 20px;
  border: 1px solid #d8deea;
  overflow: hidden;
  background: #e9eef5;
}

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

.program-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
  color: #153964;
  line-height: 1.3;
}

.program-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: #5d6b7c;
}

/* =========================
   IMPACT
========================= */

.impact-banner {
  min-height: 210px;
  display: grid;
  grid-template-columns: 1fr;
  overflow: hidden;
  border: 1px solid #d2dced;
  background: linear-gradient(90deg, #163c72 0%, #245ea7 45%, #0c2542 100%);
  box-shadow: 0 3px 10px rgba(29, 44, 72, 0.06);
}

.impact-left {
  padding: 40px 42px;
  color: #ffffff;
}

.impact-left ul {
  margin: 0;
  padding-left: 20px;
}

.impact-left li {
  margin-bottom: 22px;
  font-size: 20px;
  line-height: 1.5;
}

.impact-left li::marker {
  color: #ffcf62;
}

/* =========================
   NEWS
========================= */

.news-box {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid #dfe5ee;
  box-shadow: 0 3px 10px rgba(29, 44, 72, 0.04);
  padding: 18px 30px;
}

.news-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid #e6ebf2;
  font-size: 19px;
  color: #4e5d70;
}

.news-item:last-child {
  border-bottom: none;
}

.news-check {
  width: 28px;
  height: 28px;
  border: 1px solid #e09a95;
  background: #fff7f6;
  color: #d1584a;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  font-weight: 700;
}

/* =========================
   FOOTER
========================= */

.site-footer {
  background: #0b2a4a;
  color: rgba(255, 255, 255, 0.88);
  padding: 24px 0;
  margin-top: 40px;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.footer-wrap p {
  margin: 0;
  font-size: 14px;
}

/* =========================
   SUBPAGE COMMON
========================= */

.subpage-main {
  min-height: 700px;
}

.subpage-hero {
  background: #eef2f7;
  padding: 55px 0 40px;
  border-bottom: 1px solid #dde4ee;
}

.subpage-hero h1 {
  margin: 0 0 14px;
  font-size: 44px;
  color: #1b3d6d;
  font-weight: 800;
}

.subpage-hero p {
  margin: 0;
  font-size: 18px;
  color: #5c6a7b;
}

.simple-section h2 {
  margin: 0 0 24px;
  font-size: 28px;
  color: #173964;
  font-weight: 800;
}

.content-card,
.publication-item,
.news-list-item {
  background: #ffffff;
  border: 1px solid #dde4ee;
  box-shadow: 0 3px 10px rgba(29, 44, 72, 0.04);
  border-radius: 8px;
  padding: 24px 28px;
  margin-bottom: 18px;
}

.content-card h3,
.publication-item h3 {
  margin: 0 0 12px;
  font-size: 22px;
  color: #173964;
}

.content-card p,
.publication-item p {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.8;
  color: #5c6a7b;
}

/* =========================
   TEAM
========================= */

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 36px;
}

.team-grid-single {
  grid-template-columns: 1fr;
  max-width: 380px;
}

.team-card {
  background: #ffffff;
  border: 1px solid #dde4ee;
  box-shadow: 0 3px 10px rgba(29, 44, 72, 0.04);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
}

.team-photo {
  width: 160px;
  height: 160px;
  margin: 0 auto 18px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid #d2dbe8;
  background: linear-gradient(135deg, #dbe7f5 0%, #a6bfdc 100%);
}

.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-card h3 {
  margin: 0 0 10px;
  font-size: 22px;
  color: #173964;
}

.team-card p {
  margin: 0 0 8px;
  font-size: 15px;
  color: #5c6a7b;
  line-height: 1.6;
}

.team-role {
  font-weight: 700;
  color: #173964;
}

/* =========================
   PUBLICATIONS / NEWS LIST
========================= */

.news-list-item {
  display: flex;
  align-items: center;
  gap: 20px;
}

.news-date {
  width: 90px;
  font-weight: 700;
  color: #173964;
}

.news-text {
  flex: 1;
  font-size: 17px;
  color: #556377;
}

/* =========================
   JOIN US
========================= */

.joinus-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.map-card {
  min-height: 280px;
}

.map-placeholder {
  height: 210px;
  border: 1px dashed #b8c4d6;
  background: linear-gradient(135deg, #eef3f9 0%, #dbe6f3 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #5c6a7b;
  font-size: 16px;
  text-align: center;
  border-radius: 8px;
  overflow: hidden;
}

.map-placeholder iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* =========================
   SCROLL REVEAL ANIMATION
========================= */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.show {
  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; }

/* =========================
   RESPONSIVE
========================= */

@media (max-width: 1200px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-images,
  .hero-text {
    height: auto;
  }

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

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

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

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

  .news-box {
    width: 100%;
  }
}

@media (max-width: 768px) {
  .nav-wrap {
    flex-direction: column;
    min-height: auto;
    padding: 16px 0;
    gap: 12px;
  }

  .main-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px;
  }

  .main-nav a {
    padding: 6px 0;
    font-size: 15px;
  }

  .main-nav a.active::after {
    bottom: -2px;
    height: 3px;
  }

  .site-logo {
    text-align: center;
    font-size: 16px;
  }

  .hero-images {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: 1fr 1fr;
    height: 420px;
  }

  .hero-card {
    min-height: 0;
  }

  .hero-text {
    padding: 28px 24px;
  }

  .hero-text h1 {
    font-size: 38px;
  }

  .hero-text h2 {
    font-size: 22px;
  }

  .hero-desc {
    width: 100%;
    font-size: 16px;
  }

  .hero-buttons {
    gap: 10px;
  }

  .btn {
    min-width: 100px;
    padding: 12px 16px;
    font-size: 15px;
  }

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

  .team-grid,
  .team-grid-single {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

  .section-title-left,
  .section-title-center {
    gap: 12px;
  }

  .section-title-left h2,
  .section-title-center h2 {
    font-size: 22px;
  }

  .subpage-hero h1 {
    font-size: 34px;
  }

  .subpage-hero p {
    font-size: 16px;
  }

  .impact-left li {
    font-size: 17px;
  }

  .news-list-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .news-date {
    width: auto;
  }

  .footer-wrap {
    flex-direction: column;
    text-align: center;
  }
}