/* Global Theme Variables */
:root {
  --bg-color: #1f1f1f;          /* Overall page background */
  --container-color: #2c2c2c;     /* Nav background */
  --light-container: #f9f9f9;     /* Landing page background */
  --text-color: #e2e2e2;
  --light-text: #333333;
  --accent-color: #6366F1;        /* Purple accent */
  --border-color: #444444;
  --transition-speed: 0.3s;
}

/* Base Styles */
body {
  font-family: 'Montserrat', Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* Removed header styles entirely */

/* Navigation */
nav {
  background-color: var(--container-color);
  height: 100vh; /* full height since no header */
  position: fixed;
  left: 0;
  top: 0; /* adjusted from 50px to 0 */
  width: 225px;
  overflow-y: auto;
  padding: 10px;
  box-sizing: border-box;
  border-right: 1px solid var(--border-color);
}
nav::-webkit-scrollbar {
  display: none;
}

/* Home Icon */
.home-icon-container {
  text-align: center;
  margin-bottom: 20px;
  margin-top: 10px;

}
.home-icon {
  cursor: pointer;
  font-size: 1.3em;  /* Increased font size */
  border: 1px solid var(--border-color);
  background-color: var(--accent-color);
  padding: 8px 15px;  /* More vertical (and horizontal) padding */
  border-radius: 4px;
  color: #fff;
}
.home-icon:hover {
  filter: brightness(1.1);
}


/* Navigation Sections */
nav .tech-section {
  border: 1px solid var(--border-color);
  background-color: var(--container-color);
  padding: 8px;
  margin-top: 10px;
  border-radius: 4px;
}
nav h3 {
  color: var(--text-color);
  margin: 0 0 5px 0;
  font-size: 1em;
}

/* Nav Buttons */
nav button {
  display: block;
  width: calc(100% - 8px);
  margin: 6px auto;
  padding: 8px 8px;
  background-color: var(--accent-color);
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.95em;
  text-align: left;
  transition: background-color var(--transition-speed);
}
nav button:hover {
  filter: brightness(1.1);
}

/* Main Content Area */
main {
  position: fixed;
  left: 225px;
  top: 0; /* adjusted from 50px to 0 */
  right: 0;
  bottom: 0;
  overflow: hidden;
  box-sizing: border-box;
}

/* Landing Page with light background */
#landing-page {
  background-color: var(--light-container);
  color: var(--light-text);
  padding: 20px;
  height: 100vh; /* adjusted from calc(100vh - 50px) */
  overflow-y: auto;
  box-sizing: border-box;
}

/* Dynamic Tool Grid */
.tool-category {
  margin-bottom: 20px;
}
.tool-category h3 {
  margin: 0 0 10px 0;
  color: var(--light-text);
  font-size: 1.5em;
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 5px;
}
.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
}
.tool-tile {
  background-color: var(--accent-color);
  color: #fff;
  padding: 20px;
  text-align: center;
  border: none;
  border-radius: 8px;
  font-size: 1em;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s;
  width: 100%;
}
.tool-tile:hover {
  filter: brightness(1.1);
  transform: translateY(-5px);
}

/* Iframe for Sub-Pages */
/* Remove any background override so sub–apps use their own styling */
iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
}

/* Preview Containers for Tiles */
.tool-preview-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
  position: relative;
}
.tool-preview {
  width: 400%;
  height: 600px;
  border: 1px solid var(--border-color);
  border-radius: 32px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  transform: scale(0.25);
  transform-origin: top left;
  margin-right: -300%;
  margin-bottom: -450px;
  pointer-events: auto;
  transition: transform var(--transition-speed);
}
.preview-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  background: transparent;
  z-index: 10;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  nav {
    display: none;
  }
  main {
    left: 0;
  }
  .tool-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}