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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  background: #ffffff;
  color: #0b274d;
  line-height: 1.6;
}

.container {
  width: min(1160px, 90%);
  margin: auto;
}


/* HEADER */

.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid #edf1f5;
  backdrop-filter: blur(12px);
}

.navbar {
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  width: 95px;
  height: 72px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-links a {
  color: #0b274d;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
  transition: 0.25s;
}

.nav-links a:hover {
  color: #00aa9d;
}

.menu-btn {
  display: none;
  border: none;
  background: transparent;
  color: #0b274d;
  font-size: 26px;
  cursor: pointer;
}


/* HERO */

.hero {
  min-height: 680px;
  display: flex;
  align-items: center;

  background:
    radial-gradient(
      circle at 90% 15%,
      rgba(0, 174, 157, 0.12),
      transparent 30%
    ),
    linear-gradient(
      135deg,
      #f5fbff,
      #ffffff
    );
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: center;
}

.badge {
  display: inline-block;
  color: #00aa9d;
  font-weight: 900;
  letter-spacing: 3px;
  margin-bottom: 20px;
}

.hero h1 {
  max-width: 700px;
  font-size: clamp(48px, 6vw, 78px);
  line-height: 1.03;
  letter-spacing: -3px;
}

.hero h1 span {
  color: #00aa9d;
}

.hero-text > p {
  max-width: 650px;
  margin-top: 24px;
  color: #60748d;
  font-size: 18px;
}


/* HERO PANEL */

.hero-panel {
  background: #0c2b53;
  color: white;
  padding: 48px;
  border-radius: 28px;
  box-shadow: 0 30px 70px rgba(10, 43, 83, 0.22);
}

.panel-small {
  color: #00d3be;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1.5px;
}

.hero-panel h2 {
  margin-top: 18px;
  font-size: 42px;
  line-height: 1.15;
}

.hero-panel > p {
  margin-top: 15px;
  color: #c7d4e2;
}

.stats {
  margin-top: 35px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

.stat {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 18px 10px;
  border-radius: 14px;
  text-align: center;
}

.stat strong {
  display: block;
  color: #00d3be;
  font-size: 23px;
}

.stat span {
  color: #d6e0eb;
  font-size: 13px;
}


/* SECTIONS */

.section {
  padding: 105px 0;
}

.section-heading {
  max-width: 720px;
  margin: 0 auto 55px;
  text-align: center;
}

.section-heading > span {
  color: #00aa9d;
  font-size: 14px;
  letter-spacing: 2px;
  font-weight: 900;
}

.section-heading h2 {
  margin-top: 10px;
  font-size: 44px;
  line-height: 1.15;
}

.section-heading p {
  margin-top: 12px;
  color: #6a7c91;
}


/* COURSES */

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.course-card {
  min-height: 380px;
  padding: 32px;
  background: #ffffff;
  border: 1px solid #e5ebf1;
  border-radius: 20px;
  transition: 0.3s;
}

.course-card:hover {
  transform: translateY(-8px);
  border-color: #b6e8e2;
  box-shadow: 0 20px 50px rgba(9, 39, 75, 0.09);
}

.course-number {
  color: #00aa9d;
  font-size: 32px;
  font-weight: 900;
}

.course-card h3 {
  margin-top: 20px;
  font-size: 24px;
}

.course-card > p {
  margin-top: 12px;
  color: #667a91;
}

.course-card ul {
  margin: 25px 0 0 20px;
}

.course-card li {
  margin: 8px 0;
  color: #455d77;
}


/* ABOUT */

.about {
  background: #f5fafc;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.feature-card {
  padding: 35px;
  background: #ffffff;
  border-radius: 20px;
  border: 1px solid #edf1f5;
}

.feature-number {
  width: 58px;
  height: 58px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #e4fbf7;
  color: #00aa9d;
  border-radius: 15px;
  font-weight: 900;
}

.feature-card h3 {
  margin-top: 22px;
  font-size: 23px;
}

.feature-card p {
  margin-top: 10px;
  color: #697c92;
}


/* FOOTER */

.footer {
  background: #07192f;
  color: white;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 70px;
  padding-top: 70px;
  padding-bottom: 60px;
}

.footer-logo {
  width: 150px;
  max-height: 110px;
  object-fit: contain;
  background: white;
  padding: 10px;
  border-radius: 14px;
}

.footer-brand > p {
  margin-top: 15px;
  color: white;
  font-weight: 700;
}

.footer-description {
  max-width: 320px;
  color: #91a4ba !important;
  font-weight: 400 !important;
  line-height: 1.7;
}

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

.footer-column h3 {
  font-size: 22px;
  margin-bottom: 20px;
}

.footer-column a {
  color: #9cadc0;
  text-decoration: none;
  margin: 7px 0;
  transition: 0.25s;
}

.footer-column a:hover {
  color: #00d3be;
  transform: translateX(4px);
}

.footer-contact a {
  display: flex;
  gap: 11px;
  align-items: center;
}

.footer-contact i {
  width: 22px;
  color: #00d3be;
  font-size: 18px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-bottom-content {
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-bottom p {
  color: #8295aa;
  font-size: 14px;
}


/* RESPONSIVE */

@media (max-width: 900px) {

  .hero-grid {
    grid-template-columns: 1fr;
    padding: 80px 0;
  }

  .course-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }

}


@media (max-width: 700px) {

  .navbar {
    min-height: 75px;
  }

  .logo img {
    width: 75px;
    height: 58px;
  }

  .menu-btn {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 75px;
    left: 5%;
    width: 90%;
    padding: 20px;
    flex-direction: column;
    align-items: flex-start;
    background: white;
    border: 1px solid #e8edf2;
    border-radius: 16px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
  }

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

  .hero h1 {
    font-size: 46px;
    letter-spacing: -2px;
  }

  .hero-panel {
    padding: 30px 24px;
  }

  .hero-panel h2 {
    font-size: 32px;
  }

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

  .section {
    padding: 75px 0;
  }

  .section-heading h2 {
    font-size: 34px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 35px;
    padding-top: 50px;
  }

  .footer-brand {
    grid-column: auto;
  }

  .footer-bottom-content {
    padding: 25px 0;
    text-align: center;
  }

}