:root {
  --blue: #33497A;
  --red: #BF4063;
  --white: #FFFFFF;
  --black: #000000;

  --bg-color: var(--white);
  --text-color: var(--black);
  --link-color: var(--black);
  --section-bg: var(--white);
  --card-bg: var(--blue);
  --nav-bg: #A9A9A9;
  --footer-bg: var(--black);
}

body.dark-mode {
  --bg-color: #121212;
  --text-color: #EDEDED;
  --link-color: #FFFFFF;
  --section-bg: #1C1C1C;
  --card-bg: #22345E;
  /* --nav-bg: #22345E; */
  --nav-bg: #333333;
  --footer-bg: #0B0B0B;
}

/* Hamburger menu */
    .hamburger {
      display: none;
      flex-direction: column;
      cursor: pointer;
    }

    .hamburger div {
      width: 25px;
      height: 3px;
      background-color: var(--light);
      margin: 4px;
      transition: 0.3s;
    }

    .nav-links {
      display: flex;
      gap: 1rem;
      list-style: none;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        background-color: var(--primary);
        position: absolute;
        top: 70px;
        right: 0;
        width: 200px;
        text-align: right;
        padding: 1rem;
      }

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

      .hamburger {
        display: flex;
      }
    }

/* Base */
body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  color: var(--text-color);
  background-color: var(--bg-color);
  transition: background-color 0.4s, color 0.4s;
  overflow-x: hidden;
}

header {
  background: var(--nav-bg);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 90%;
  margin: auto;
  padding: 0.8rem 0;
  flex-wrap: wrap;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-img {
  /* width: 55px; */
  height: 55px;
  object-fit: contain;
}

/* .nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
} */

.nav-links a {
  color: var(--link-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

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

/* Theme toggle */
#theme-toggle {
  background: none;
  /* border: 2px solid var(--white); */
  color: var(--white);
  border-radius: 50%;
  cursor: pointer;
  /* padding: 0.4rem 0.6rem; */
  padding: 0;
  font-size: unset;
  transition: background 0.3s, transform 0.3s;
}
#theme-toggle:hover {
  background: var(--red);
  transform: scale(1.1);
}

/* Hero Banner */
.hero {
  background: url("images/background_img.png") center/cover no-repeat;
  height: 35vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.7);
}

.hero-content {
  position: relative;
  color: #fff;
  z-index: 2;
  padding: 1rem;
  margin: 10rem auto;
}

.hero-content h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.cta-btn {
  background-color: var(--red);
  color: var(--white);
  padding: 0.8rem 1.5rem;
  border: none;
  border-radius: 25px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.3s;
}
.cta-btn:hover {
  background-color: var(--blue);
}

/* Sections */
section {
  padding: 4rem 0;
  text-align: center;
}
.container {
  width: 90%;
  margin: auto;
  max-width: 1200px;
}

.description {
  background-color: var(--blue);
  color: var(--white);
  padding: 2rem 0 4rem;
}

/* Services */
.services h2 {
  color: var(--blue);
}
body.dark-mode .services h2 {
  color: var(--white);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.service-card {
  background: var(--card-bg);
  color: var(--white);
  border-radius: 10px;
  overflow: hidden;
  transition: transform 0.3s, background 0.3s;
}

.service-card > p {
  padding: 0 20px;
}

.service-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.service-card:hover {
  background: var(--red);
  transform: translateY(-5px);
}

/* About */
.about {
  background-color: var(--blue);
  color: var(--white);
}
.partners {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 3rem;
  margin-top: 2rem;
}
.partner {
  max-width: 300px;
}
.partner img {
  width: 100%;
  border-radius: 10px;
  height: 250px;
  object-fit: cover;
}

/* Contact */
.contact {
  background-color: var(--red);
  color: var(--white);
}
.contact-info {
  list-style: none;
  padding: 0;
  margin-top: 2rem;
  line-height: 2rem;
}
.contact-info a {
  color: var(--white);
  text-decoration: none;
}
.contact-info a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  background-color: var(--footer-bg);
  color: var(--white);
  text-align: center;
  padding: 1rem;
}

/* Back to Top */
#backToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: none;
  background-color: var(--blue);
  color: var(--white);
  border: none;
  border-radius: 50%;
  padding: 0.6rem 0.8rem;
  font-size: 1.5rem;
  cursor: pointer;
  transition: transform 0.3s, background 0.3s;
  z-index: 999;
}
#backToTop:hover {
  background-color: var(--blue);
  transform: scale(1.1);
}

/* Fade-in */
.fade-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.fade-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 1rem;
  }
  .nav-links {
    flex-direction: column;
  }
  .partners {
    flex-direction: column;
  }
  .hero-content h1 {
    font-size: 1.8rem;
  }
  .hero-content p {
    font-size: 1rem;
  }
}
@media (max-height: 768px) {
  .hero-content {
    margin: 0;
  }
}