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

body {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  color: #222;
}

header {
  background-color: #550000;
  color: #fff;
  padding: 18px 20px;
}

header h1 {
  font-size: 1.7rem;
  font-weight: bold;
}

header p {
  font-size: 0.85rem;
  margin-top: 4px;
}

.wrapper {
  display: flex;
  flex-wrap: wrap;
  border: 1px solid #ddd;
}


nav {
  width: 160px;
  border-right: 1px solid #ddd;
}


nav ul li a {
  border: #fff3f3 solid 1px;
  border-radius: 10px;
  display: block;
  padding: 10px 14px;
  text-decoration: none;
  color: #380d0d;
  font-size: 0.9rem;
  border-bottom: 1px solid #eee;
}

nav ul li a:hover { 
  background-color: #6e2a2a; 
}

nav ul li.active a {
  background-color: #f50000;
  color: #fff;
  font-weight: bold;
}

main {
  width: calc(100% - 320px);
  padding: 20px;
}

main h2 {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

main h3 {
  font-size: 1.05rem;
  margin: 16px 0 8px;
}

main p {
  line-height: 1.65;
  color: #333;
  margin-bottom: 10px;
}

main a {
  color: #003679;
  text-decoration: underline;
}

aside {
  width: 160px;
  background-color: #832c2c;
  color: #fff;
  padding: 14px;
}

aside h4 {
  font-size: 0.95rem;
  font-weight: bold;
  margin-bottom: 10px;
}

aside p {
  font-size: 0.85rem;
  line-height: 1.55;
}

footer {
  border: 1px solid #ddd;
  border-top: none;
  padding: 12px 20px;
  font-size: 0.78rem;
  color: #444;
  line-height: 1.65;
  text-align: center;
  background-color: #fafafa;
}


@media screen and (max-width: 1024px) and (min-width: 601px) {
  nav {
    width: 160px;
    order: 1;
    border-right: 1px solid #ddd;
  }

  main {
    width: calc(100% - 160px);
    order: 2;
  }

  aside {
    width: 100%;
    order: 3;
  }
}


@media screen and (max-width: 600px) {
  nav {
    width: 100%;
    order: 1;
    border-right: none;
    border-bottom: 1px solid #ddd;
  }

  main {
    width: 100%;
    order: 2;
  }

  aside {
    width: 100%;
    order: 3;
  }

  header h1 {
    font-size: 1.3rem;
  }
}

.layout4-section {
  background-color: #f8f9ff;
}

.card-grid {
  display: grid;
  gap: 1.5rem;
}

.feature-card {
  background-color: #ffffff;
  border-radius: 1.75rem;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.feature-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  background-color: #e7f1ff;
  color: #0d6efd;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

@media screen and (min-width: 768px) {
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media screen and (min-width: 992px) {
  .card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}