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

html {
  scroll-behavior: smooth; /* Smooth scrolling */
}

body {
  font-family: "Times New Roman", Times, serif;
  line-height: 1.6;
  color: var(--text-color, #333);
  background: var(--bg-color, #f9f9f9);
  transition: background 0.3s, color 0.3s;
}

/* Light theme (default) */
:root {
  --bg-color: #f9f9f9;
  --text-color: #333;
  --nav-bg: #4a90e2;
  --nav-text: white;
  --footer-bg: #4a90e2;
  --footer-text: white;
  --link-color: #0066cc;   /* blue links for light mode */
  --link-hover: #004999;
}

/* Softer Dark theme */
body.dark {
  --bg-color: #2b2b2b;
  --text-color: #e6e6e6;
  --nav-bg: #3a3a3a;
  --nav-text: #e6e6e6;
  --footer-bg: #3a3a3a;
  --footer-text: #e6e6e6;
  --link-color: #66aaff;   /* lighter blue for dark mode */
  --link-hover: #99cfff;
}

/* General links */
a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}



/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--nav-bg);
  color: var(--nav-text);
  padding: 10px 20px;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
  align-items: center;
}

.nav-links li a {
  text-decoration: none;
  color: var(--nav-text);
  font-weight: bold;
}

.nav-links li a:hover {
  text-decoration: underline;
}

/* Mobile menu button */
.menu-toggle {
  display: none;
  font-size: 1.5rem;
  background: none;
  border: none;
  color: var(--nav-text);
  cursor: pointer;
}

/* Toggle Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 20px;
}

.switch input {
  display: none;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0;
  right: 0; bottom: 0;
  background-color: #ccc;
  transition: 0.4s;
  border-radius: 20px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: #4a90e2;
}

input:checked + .slider:before {
  transform: translateX(20px);
}

/* Header */
header {
  text-align: center;
  padding: 50px 20px;
  background: #eee;
}

body.dark header {
  background: #222;
}

/* Sections */
main {
  max-width: 800px;
  margin: auto;
  padding: 20px;
}

section {
  margin-bottom: 40px;
}

h2 {
  margin-bottom: 10px;
  border-bottom: 2px solid var(--text-color);
  padding-bottom: 5px;
}

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  background: var(--footer-bg);
  color: var(--footer-text);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    flex-direction: column;
    display: none;
    background: var(--nav-bg);
    width: 100%;
    position: absolute;
    top: 60px;
    left: 0;
    padding: 10px 0;
  }

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

    /* Hamburger Menu Animation */
    .menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1100;
    }

    .menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background: var(--nav-text);
    border-radius: 2px;
    transition: all 0.3s ease-in-out;
    }

    /* Animation when active */
    .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle.active span:nth-child(2) {
    opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
    }

}