:root {
  --primary-color: #2a6b7c;
  --secondary-color: #3aa6b9;
  --accent-color: #7bd3ea;
  --light-color: #f0f7fa;
  --dark-color: #1a4a53;
  --text-color: #333;
  --light-text: #f8f9fa;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --border-radius: 12px;
}

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

body {
  font-family: "Poppins", sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: #f9f9f9;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
  font-family: "Quicksand", sans-serif;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
}

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

/* Header */
header {
  background-color: white;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon {
  color: var(--primary-color);
  font-size: 28px;
}

.logo-text {
  font-family: "Quicksand", sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
}

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

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

.nav-links a::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 0;
  background-color: var(--secondary-color);
  transition: width 0.3s;
}

.nav-links a:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--primary-color);
  cursor: pointer;
}

/* Hero Section */
.hero {
  background: linear-gradient(
    135deg,
    var(--primary-color) 0%,
    var(--secondary-color) 100%
  );
  color: white;
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("./imgs/bg.avif");
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}

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

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 20px;
  color: white;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

.cta-button {
  display: inline-block;
  background-color: var(--accent-color);
  color: var(--dark-color);
  padding: 15px 40px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 2px solid transparent;
}

.cta-button:hover {
  background-color: white;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
  border-color: var(--accent-color);
}

/* Features Section */
.features {
  padding: 100px 0;
  background-color: white;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
  color: var(--primary-color);
}

.section-title h2 {
  font-size: 2.5rem;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: "";
  position: absolute;
  width: 70px;
  height: 4px;
  background-color: var(--accent-color);
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 2px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.feature-card {
  background-color: var(--light-color);
  border-radius: var(--border-radius);
  padding: 40px 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  font-size: 48px;
  color: var(--secondary-color);
  margin-bottom: 25px;
}

.feature-card h3 {
  font-size: 1.8rem;
  color: var(--dark-color);
  margin-bottom: 20px;
}

/* About Section */
.about {
  padding: 100px 0;
  background-color: #f0f7fa;
}

.about-content {
  display: flex;
  align-items: center;
  gap: 50px;
}

.about-text {
  flex: 1;
}

.about-text h2 {
  color: var(--primary-color);
  font-size: 2.5rem;
  margin-bottom: 25px;
}

.about-image {
  flex: 1;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.about-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s;
}

.about-image:hover img {
  transform: scale(1.05);
}

/* Download Section */
.download {
  padding: 100px 0;
  background: linear-gradient(
    135deg,
    var(--dark-color) 0%,
    var(--primary-color) 100%
  );
  color: white;
  text-align: center;
}

.download h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.download p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 40px;
  opacity: 0.9;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.store-button {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: white;
  color: var(--dark-color);
  padding: 15px 30px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.store-button:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.store-icon {
  font-size: 28px;
}

/* Footer */
footer {
  background-color: var(--dark-color);
  color: white;
  padding: 60px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  font-family: "Quicksand", sans-serif;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--accent-color);
}

.footer-section h3 {
  color: var(--accent-color);
  margin-bottom: 25px;
  font-size: 1.3rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #ddd;
  text-decoration: none;
  transition: color 0.3s;
}

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

.contact-info {
  list-style: none;
}

.contact-info li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
}

.contact-icon {
  color: var(--accent-color);
}

.copyright {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
  opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 992px) {
  .hero h1 {
    font-size: 2.8rem;
  }

  .about-content {
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: white;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
  }

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

  .mobile-menu-btn {
    display: block;
  }

  .hero h1 {
    font-size: 2.3rem;
  }

  .section-title h2 {
    font-size: 2rem;
  }

  .feature-card {
    padding: 30px 20px;
  }
}

@media (max-width: 576px) {
  .hero {
    padding: 60px 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .features,
  .about,
  .download {
    padding: 70px 0;
  }

  .store-button {
    width: 100%;
    justify-content: center;
  }

  .download-buttons {
    flex-direction: column;
    align-items: center;
  }
}