:root {
  --bg-color: #0d0d0d;
  --text-color: #0ff;
  --accent-color: #0ff;
  --shadow: 0 0 12px #0ff;
  --font-family: 'Courier New', Courier, monospace;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-color);
  overflow-x: hidden;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
body.light {
  --bg-color: #f4f4f4;
  --text-color: #222;
  --accent-color: #333;
}

body.dark {
  --bg-color: #070707;
  --text-color: #ffffff;
  --accent-color: #d7d2d2;
}

body.neon {
  --bg-color: #0d0d0d;
  --text-color: #0ff;
  --accent-color: #0ff;
}

#particles {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.content-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* Main content flex-grow */
.main-content {
  flex: 1;
  padding: 80px 20px;
  text-align: center;
}

/* Footer unified */
footer {
  text-align: center;
  padding: 20px;
  color: var(--text-color);
  background-color: var(--bg-color);
  font-size: 0.9rem;
  box-shadow: 0 -1px 10px var(--accent-color);
  border-top: 2px solid var(--accent-color);
}


/* Parallax Background */
.parallax {
  background-image: url('https://www.transparenttextures.com/patterns/stardust.png');
  background-attachment: fixed;
  background-position: center;
  background-repeat: repeat;
  background-size: cover;
}

/* Navbar */
header {
  background-color: var(--bg-color);
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
  border-bottom: 1px solid var(--accent-color);
}


.logo {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--accent-color);
  text-shadow: var(--shadow);
  text-decoration: none;
}

.nav-links a {
  margin-left: 20px;
  color: var(--accent-color);
  text-decoration: none;
  font-size: 1.1rem;
}

.nav-links a:hover {
  text-shadow: var(--shadow);
}

/* Tool List Buttons */
.tool-grid {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  padding: 40px 0;
}

.tool-grid .column {
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex: 1;
  align-items: center;
}

@media (max-width: 768px) {
  .tool-grid {
    flex-direction: column;
    align-items: center;
  }

  .tool-grid .column {
    width: 100%;
  }
}

.tool {
  background-color: transparent;
  border: 2px solid var(--accent-color);
  padding: 15px 30px;
  margin: 15px;
  font-size: 1.2rem;
  color: var(--accent-color);
  text-decoration: none;
  border-radius: 8px;
  box-shadow: var(--shadow);
  transition: 0.3s;
}

.tool:hover {
  background-color: var(--accent-color);
  color: var(--bg-color);
  box-shadow: 0 0 20px var(--accent-color);
}

.theme-switcher {
  position: fixed;
  top: 80px;
  right: 20px;
  z-index: 1000;
  display: flex;
  gap: 10px;
  font-size: 1.6rem;
  cursor: pointer;
}

.theme-switcher span {
  transition: transform 0.2s ease;
}

.theme-switcher span:hover {
  transform: scale(1.3);
}