:root {
  /* Colors */
  --text: #cad2c5;
  --background: #2f3e46;
  --accent-dark: #52796f;
  --accent: #84a98c;
  --accent-light: #cb78ac;

  /* Fonts */
  --basefont: "Segoe UI", sans-serif;
  --titlefont: monospace;
  --text-size: 16px;

  /* Layout & Spacing */
  --max-width: 1200px;
  --spacing: 15px;
  --halfspacing: calc(var(--spacing) / 2);
  --doublespacing: calc(var(--spacing) * 2);

  /* Borders & Decoration */
  --border-radius: 12px;
  --border: solid var(--accent) 1px;
  --underline: wavy var(--accent-light);

  /* Gallery */
  --minimum-img-width: 150px;
  --maximum-img-width: 400px;
  --maximum-columns: 4;
  --image-background: #354f52;
  --column-gap: var(--spacing);
}

/* Reset */
* {
  box-sizing: border-box;
  max-width: 100%;
  margin: 0;
  padding: 0;
}

body {
  overflow-x: hidden;
  overflow-y: scroll;
  padding: var(--spacing) 5%;
  background: linear-gradient(135deg, var(--background) 0%, #354f52 100%);
  color: var(--text);
  font-family: var(--basefont);
  font-size: var(--text-size);
  line-height: 1.5em;
  transition: background 0.5s ease;
}

header,
main,
footer {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Header */
header {
  text-align: center;
  padding-bottom: var(--spacing);
  position: relative;
}

#header-art {
  width: 100%;
  max-height: 600px;
  object-fit: cover;
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
  transition: transform 0.5s ease, filter 0.5s ease;
}
#header-art:hover {
  transform: scale(1.02);
  filter: brightness(1.05);
}

/* Navigation */
nav {
  padding-top: var(--spacing);
  text-align: center;
}
nav a {
  padding: 8px 12px;
  margin: 5px;
  text-decoration: none;
  color: var(--accent);
  font-weight: bold;
  transition: 0.3s ease;
  position: relative;
}
nav a::after {
  content: "";
  display: block;
  height: 2px;
  width: 0;
  background: var(--accent-light);
  transition: width 0.3s ease;
  position: absolute;
  bottom: -2px;
  left: 0;
}
nav a:hover {
  color: var(--accent-light);
}
nav a:hover::after {
  width: 100%;
}

/* Headings */
h1, h2, h3, h4 {
  font-family: var(--titlefont);
  text-align: center;
  line-height: 1.3em;
  margin: 1.5em auto;
}
h2 { color: var(--accent-light); }
h3 {
  color: var(--text);
  background: linear-gradient(90deg, var(--accent), var(--accent-dark));
  padding: 5px;
  border-radius: var(--border-radius);
}
h4 {
  color: var(--accent-dark);
  background-color: var(--accent-light);
  padding: 4px;
  border-radius: var(--border-radius);
  font-weight: normal;
}

/* Links */
a {
  color: var(--accent);
  text-decoration: underline var(--underline);
  text-underline-offset: 0.15em;
  transition: color 0.3s ease, transform 0.3s ease;
}
a:hover {
  color: var(--accent-light);
  transform: scale(1.05);
}

/* Lists */
ol, ul { margin: var(--spacing); }
li { padding-left: var(--halfspacing); margin: var(--halfspacing) auto; }
li::marker { color: var(--accent); }

/* Blockquote */
blockquote {
  padding-left: var(--doublespacing);
  margin: var(--doublespacing);
  border-left: var(--border);
  color: var(--accent-dark);
  font-style: italic;
}

/* Gallery & Boxes */
#gallery {
  margin: var(--doublespacing) auto;
  text-align: center;
  line-height: 1.2em;
  font-size: 0.9em;
}
figure {
  display: inline-block;
  width: 100%;
  margin: var(--spacing) auto;
  break-inside: avoid;
  background: linear-gradient(145deg, #354f52, #2f3e46);
  padding: var(--spacing);
  border-radius: var(--border-radius);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
figure:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.4);
}
#gallery img,
#gallery video {
  width: 100%;
  max-width: var(--maximum-img-width);
  height: auto;
  object-fit: cover;
  display: block;
  margin: var(--spacing) auto;
  background-color: var(--image-background);
  border-radius: var(--border-radius);
  cursor: pointer;
}
.box {
  padding: var(--spacing);
  border: var(--border);
  margin: var(--spacing) auto;
  border-radius: var(--border-radius);
  background: linear-gradient(145deg, var(--accent-dark), var(--accent));
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.box:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 20px rgba(0, 0, 0, 0.3);
}
.flex {
  display: flex;
  flex-wrap: wrap;
  gap: var(--halfspacing) var(--spacing);
}
.flex > * { flex: 1 2 200px; margin: 0 auto; }
.center { text-align: center; }

/* Lightbox */
#lightbox {
  display: none;
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.9);
  justify-content: center;
  align-items: center;
  z-index: 999;
  cursor: pointer;
}
#lightbox-content img,
#lightbox-content video {
  max-height: 90vh;
  max-width: 90vw;
  border-radius: var(--border-radius);
}
#lightbox video {
  background: black;
}
#prev, #next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  font-size: 5rem;
  font-weight: bold;
  color: white;
  cursor: pointer;
  user-select: none;
  padding: 20px;
  z-index: 1000;
  transition: color 0.2s ease;
}
#prev:hover, #next:hover { color: var(--accent-light); }
#prev { left: 20px; }
#next { right: 20px; }

/* Footer */
footer {
  text-align: center;
  font-size: 0.9em;
  margin: var(--spacing) auto;
  background: linear-gradient(90deg, var(--accent-dark), var(--accent));
  padding: 10px;
  border-radius: var(--border-radius);
}

/* Scroll to top */
#to-top a {
  position: fixed;
  right: var(--spacing);
  bottom: var(--spacing);
  font-size: 50px;
  text-decoration: none;
  color: var(--accent-light);
}