:root {
  color-scheme: light;
  --bg: #fff;
  --accent-bg: #f5f7ff;
  --text: #212121;
  --text-light: #585858;
  --accent: #0d47a1;
  --accent-hover: #1266e2;
  --accent-text: var(--bg);
  --code: #d81b60;
  --preformatted: #444;
  --marked: #ffdd33;
  --disabled: #efefef;
}

body.dark-mode {
  color-scheme: dark;
  --bg: #212121;
  --accent-bg: #2b2b2b;
  --text: #dcdcdc;
  --text-light: #ababab;
  --accent: #ffb300;
  --accent-hover: #ffe099;
  --accent-text: var(--bg);
  --code: #f06292;
  --preformatted: #ccc;
  --disabled: #111;
}

body {
  background-color: var(--bg) !important;
  color: var(--text) !important;
  transition: background-color 0.3s, color 0.3s;
}

a {
  color: var(--accent) !important;
}

header {
  position: relative;
  padding-right: 3rem;
}

#mode-toggle {
  position: fixed;
  top: 1.25rem;
  right: 1.5rem;
  z-index: 1000;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(255, 255, 255, 0.15); /* Light mode glass */
  box-shadow: 0 4px 24px rgba(0,0,0,0.1), 0 1.5px 4px rgba(0,0,0,0.05);
  border: 3px solid var(--accent);
  font-size: 2rem;
  color: var(--accent);
  font-weight: 700;
  backdrop-filter: saturate(180%) blur(15px);
  -webkit-backdrop-filter: saturate(180%) blur(15px);
  -moz-backdrop-filter: saturate(180%) blur(15px);
  -o-backdrop-filter: saturate(180%) blur(15px);
  transition: background 0.2s, border-color 0.3s, color 0.3s;
  box-sizing: border-box;
}

body.dark-mode #mode-toggle {
  background: rgba(33, 33, 33, 0.4);
  color: var(--accent);
  border-color: var(--accent);
}

/* Hover effect */
#mode-toggle:hover {
  background: rgba(255,255,255,0.45);
  border-color: var(--accent-hover);
  color: var(--accent-hover);
}