:root {
  --navWhite: rgb(216, 216, 216);
  --navBlack: #222;
  --radGreen: #00ff88;
  --nav-hover-text: #00aa55;

  --navHoverLight: #d0d0d0;
  --navHoverDark: #333333;
  --navLightBG: #f4f4f4;
  --navDarkBG: #121212;
  --navShadowLight: #000000; /* intentionally inverted */
  --navShadowDark: rgb(255, 255, 255); /* intentionally inverted */
}

body {
  margin: 0;
  font-family: Calibri, sans-serif;
  transition:
    background 0.3s,
    color 0.3s;
}

/* DARK MODE DEFAULT */
body.dark {
  background-color: #121212;
  color: #e0e0e0;
  --nav-bg: var(--navDarkBG);
  --nav-text: var(--navWhite);
  --nav-button-bg: var(--navBlack);
  --nav-button-text: var(--navWhite);
  --nav-hover-bg: var(--navHoverDark);
  --nav-hover-text: var(--radGreen);
  --navShadow: var(--navShadowDark);
}

body.light {
  --nav-bg: var(--navLightBG);
  --nav-text: var(--navBlack);
  --nav-button-bg: var(--navWhite);
  --nav-button-text: var(--navBlack);
  --nav-hover-bg: var(--navHoverLight);
  --nav-hover-text: var(--radGreen);
  --navShadow: var(--navShadowLight);
}

/* NAVBAR */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;

  display: flex;
  align-items: center;
  justify-content: space-between;

  height: 120px;
  padding: 0 20px;

  background-image: url("tile.png");
  background-size: contain;
  background-position: center;
}

.navbar-home {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  flex: 1;
}

.nav-links a {
  padding: 8px 14px;
  border-radius: 6px;
  color: var(--nav-button-text);
  background-color: var(--nav-button-bg);
  text-decoration: none;
  transition: 0.2s;
  font-weight: 600;
}

.nav-links a:hover {
  background-color: var(--nav-hover-bg);
  color: var(--nav-hover-text);
}

.logo {
  height: 80px;
  margin-right: 15px;
}

.site-title {
  font-size: 32px;
  font-weight: bold;
  color: var(--nav-bg);
  text-shadow: 1px 1px 4px var(--navShadow);
}

.site-title:hover {
  color: var(--radGreen);
  transition: 0.2s;
}

/* DARK MODE TOGGLE */
.theme-toggle {
  background: var(--nav-button-bg);
  border: none;
  color: var(--nav-button-text);
  font-size: 20px;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.2s;
}

.theme-toggle:hover {
  background: var(--nav-hover-bg);
  color: var(--nav-hover-text);
}

.banner {
  padding-top: 1%;
  width: 70%;
  height: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
}

.banner-img {
  max-width: 100%;
  height: auto;
  display: block;
}

.content {
  padding: 40px;
  max-width: 900px;
  margin: auto;
}

.section {
  background: rgba(255, 255, 255, 0.05);
  padding: 20px;
  border-radius: 8px;
  margin-top: 30px;
}

/* MOBILE NAVBAR FIXES */

.hamburger {
  display: none;
  background: var(--navBlack);
  color: var(--navWhite);
  border: none;
  font-size: 24px;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition:
    background-color 0.2s,
    color 0.2s,
    transform 0.2s;
}

.hamburger:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--radGreen);
}

.hamburger.active {
  transform: rotate(90deg);
}

@media (max-width: 700px) {
  /* smaller, tighter navbar */
  .navbar {
    position: sticky;
    top: 0;
    z-index: 500;
    width: 100%;
    padding: 6px 10px;
    height: 50px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    background-image: url("tile.png");
    background-size: contain;
    background-position: center;
  }

  .navbar.expanded {
    height: auto;
  }

  .site-title {
    display: none;
  }

  .navbar-home {
    display: flex;
    align-items: center;
  }

  .logo {
    height: 48px;
    margin-right: 0;
  }

  /* controls (hamburger + theme toggle) on the right, same row as logo */
  .navbar-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-right: 20px;
  }

  .hamburger {
    display: block;
  }

  .theme-toggle {
    font-size: 18px;
    padding: 4px 8px;
  }

  .nav-links {
    width: 100%;
    margin-top: 6px;
    display: flex;
    flex-direction: column;
    gap: 10px;

    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-6px);
    transition:
      max-height 0.25s ease,
      opacity 0.2s ease,
      transform 0.2s ease;
  }

  .nav-links a {
    width: 90%;
    text-align: center;
    margin: 0 auto;
  }

  .nav-links.open {
    max-height: 400px;
    opacity: 1;
    transform: translateY(0);
  }
}