/* -----------------------------
   Reset and Base Styles
------------------------------ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: Arial, sans-serif;
  background: #f9f9f9;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Dark mode base */
body.dark {
  background: #1e1e1e;
  color: #eaeaea;
}

/* Add spacing below headers */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: 1rem;
}

/* Add spacing above paragraphs */
p {
  margin-bottom: 1rem;
  line-height: 1.6;
}

/* -----------------------------
   Header Styles
------------------------------ */
header.header {
  background-color: #2b6777;
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 70px;
  position: relative;
  z-index: 1001;
}

.site-info {
  display: flex;
  flex-direction: column;
}

.site-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.site-description {
  font-weight: 400;
  font-size: 1rem;
  opacity: 0.85;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-toggle {
  display: none;
  font-size: 1.75rem;
  background: none;
  border: none;
  color: white;
  cursor: pointer;
}

.mode-toggle {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  transition: transform 0.4s ease;
}

.mode-toggle:hover {
  transform: rotate(180deg);
}

/* -----------------------------
   Navbar Styles
------------------------------ */
nav.navbar {
  background-color: #3a8ca9;
}

nav ul {
  list-style: none;
  display: flex;
  position: relative;
}

nav ul li {
  position: relative;
}

nav ul li a {
  display: block;
  padding: 0.75rem 1.25rem;
  color: white;
  text-decoration: none;
  font-weight: 600;
  transition: background-color 0.3s ease, color 0.3s ease;
  white-space: nowrap;
}

nav ul li a:hover,
nav ul li a:focus {
  background-color: #265a6f;
  color: #d1e8f2;
}

nav ul li ul {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: #3a8ca9;
  min-width: 180px;
  z-index: 1000;
  flex-direction: column;
}

nav ul li:hover > ul {
  display: flex;
}

nav ul li ul li a {
  padding: 0.75rem 1rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* -----------------------------
   Main Content Styles
------------------------------ */
main.main-content {
  flex-grow: 1;
  padding: 2rem;
  background-color: inherit;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  z-index: 1;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* -----------------------------
   Footer Styles
------------------------------ */
footer.footer {
  background-color: #2b6777;
  color: white;
  text-align: center;
  padding: 1rem 2rem;
  position: sticky;
  bottom: 0;
  width: 100%;
  z-index: 1;
}

/* -----------------------------
   Responsive / Mobile
------------------------------ */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  nav.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    padding-top: 80px;
  }

  nav.navbar.show {
    max-height: 1000px;
  }

  nav ul {
    flex-direction: column;
    background-color: #3a8ca9;
  }

  nav ul li a {
    border-top: 1px solid rgba(255,255,255,0.2);
  }

  nav ul li ul {
    position: static;
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.4s ease;
  }

  nav ul li.show-submenu > ul {
    display: flex;
    max-height: 500px;
  }

  nav ul li ul li a {
    padding-left: 2rem;
  }
}

/* -----------------------------
   Dark Mode Styles
------------------------------ */
body.dark header.header,
body.dark footer.footer {
  background-color: #111;
  color: #eaeaea;
}

body.dark nav.navbar {
  background-color: #222;
}

body.dark nav ul {
  background-color: #222;
}

body.dark nav ul li a {
  color: #eee;
}

body.dark nav ul li a:hover {
  background-color: #333;
}

body.dark nav ul li ul {
  background-color: #2a2a2a;
}

body.dark nav ul li ul li a {
  border-top: 1px solid rgba(255,255,255,0.05);
}

body.dark nav ul li ul li a:hover {
  background-color: #3a3a3a;
}