/* ===== RESET ===== */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #f4f6f8; /* grey background */
  line-height: 1.6;   /* 👈 increases line spacing */
}

/* ===== GLOBAL CONTAINER ===== */
.site-wrapper {
  max-width: 1280px;           /* controls white area width */
  margin: 0 auto;              /* center on desktop */
  background-color: white;
  min-height: 100vh;
}

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  background-color: #1196cb;
  color: white;
  z-index: 1000;
}

.header-top {
  display: flex;
  align-items: center;
  padding: 10px 20px;
}

.header-top img {
  height: 64px;
}

.header-bottom {
  background-color: #0e7aa6;
}

.main-menu {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  padding: 10px 20px;
}

.main-menu a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

.main-menu a:hover {
  text-decoration: underline;
}

/* ===== CONTENT ===== */
main {
  padding: 40px 24px;
}

.page-container {
  max-width: 1000px;          /* content width inside white area */
  margin: 0 auto;
}

.page-container h1 {
  margin-top: 0;
}

/* ===== FOOTER ===== */
footer {
  background-color: #8cbcbc;
  color: white;
  text-align: center;
  padding: 12px;
  font-size: 14px;
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  .site-wrapper {
    margin: 0;                /* full width on mobile */
  }

  .header-top img {
    height: 40px;
  }

  main {
    padding: 24px 16px;
  }

  .main-menu {
    gap: 10px;
    font-size: 14px;
  }
}