:root {
  --bg-midnight: #141414;
  --bg-midnight-alt: #1f1f1f;
  --text-midnight: #e2e2e2;
  --border-midnight: #333333;
  --hover-midnight: #2b2b2b;
  --highlight-midnight: #5bc0de;
  --danger-midnight: #ef4444;
  --text-muted-midnight: #bbb;
  --shadow-light-midnight: rgba(0, 0, 0, 0.5);
  --shadow-medium-midnight: rgba(0, 0, 0, 0.6);
  --drop-zone-highlight-bg-midnight: #2a2a2a;
  --card-bg-midnight: #1c1c1c;
}

body.midnight {
  background-color: var(--bg-midnight);
  color: var(--text-midnight);
}

body.midnight header {
  background-color: var(--bg-midnight-alt);
  box-shadow: 0px 4px 6px var(--shadow-light-midnight);
}
body.midnight header h1 {
  color: var(--text-midnight);
}

body.midnight .section h2 {
  color: var(--highlight-midnight);
}

body.midnight .edit-mode-toggle {
  background: var(--hover-midnight);
  color: var(--text-midnight);
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition-speed),
    transform var(--transition-speed);
}
body.midnight .edit-mode-toggle:hover {
  background: #3a3a3a;
  transform: translateY(-2px);
}

body.midnight #search {
  background-color: var(--bg-midnight-alt);
  color: var(--text-midnight);
  border: 0px solid var(--border-midnight);
  border-radius: 8px;
  transition: border-color var(--transition-speed),
    background-color var(--transition-speed);
}
body.midnight #search:focus {
  outline: none;
  border-color: var(--highlight-midnight);
}

body.midnight .section {
  background: var(--bg-midnight-alt);
  box-shadow: 0px 4px 6px var(--shadow-light-midnight);
  border-radius: 8px;
  transition: background-color var(--transition-speed),
    box-shadow var(--transition-speed);
}
body.midnight .section h3 {
  margin-top: 0;
  color: var(--highlight-midnight);
}
body.midnight .section button,
body.midnight #theme-toggle {
  background: var(--hover-midnight);
  color: var(--text-midnight);
  border-radius: 4px;
  cursor: pointer;
  transition: background var(--transition-speed),
    transform var(--transition-speed);
  margin-right: 0.5rem;
  margin-top: 0.5rem;
}
body.midnight .section button:hover,
body.midnight #theme-toggle:hover {
  background: #3a3a3a;
  transform: translateY(-2px);
}

body.midnight .group-container {
  background: var(--bg-midnight-alt);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  box-shadow: 0px 4px 6px var(--shadow-light-midnight);
  transition: transform var(--transition-speed),
    box-shadow var(--transition-speed), background-color var(--transition-speed);
}
body.midnight .group-container:hover {
  transform: translateY(-3px);
  box-shadow: 0px 6px 10px var(--shadow-medium-midnight);
}
body.midnight .group-header h2 {
  margin: 0;
  color: var(--highlight-midnight);
}

body.midnight .card {
  background-color: var(--card-bg-midnight);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  margin-bottom: 0.75rem;
  box-shadow: 0 2px 4px var(--shadow-light-midnight);
  transition: transform var(--transition-speed),
    box-shadow var(--transition-speed);
  position: relative;
}
body.midnight .card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px var(--shadow-medium-midnight);
}
body.midnight .card h3 {
  margin: 0 0 0.25rem;
  color: var(--text-midnight);
}
body.midnight .card p {
  margin: 0;
  color: var(--text-muted-midnight);
}

body.midnight .status-dot.green {
  background-color: var(--highlight-midnight);
}
body.midnight .status-dot.yellow {
  background-color: #eab308;
}
body.midnight .status-dot.red {
  background-color: var(--danger-midnight);
}

body.midnight .drop-zone {
  border: 2px dashed var(--border-midnight);
  color: var(--border-midnight);
  background-color: transparent;
  transition: background-color var(--transition-speed),
    border-color var(--transition-speed);
}
body.midnight .drop-zone.highlight {
  background-color: var(--drop-zone-highlight-bg-midnight);
  border-color: var(--highlight-midnight);
  color: var(--highlight-midnight);
}

body.midnight #max-columns {
  background-color: var(--bg-midnight-alt);
  color: var(--text-midnight);
  transition: background-color var(--transition-speed),
    border-color var(--transition-speed);
}
body.midnight #max-columns:hover {
  background-color: var(--hover-midnight);
}
body.midnight #max-columns:focus {
  outline: none;
  border-color: var(--highlight-midnight);
  background-color: #1e1e1e;
}

body.midnight .delete-group-button {
  background: transparent;
  color: #999;
  cursor: pointer;
  transition: color var(--transition-speed), transform var(--transition-speed);
  margin-left: 0.5rem;
  padding: 0.25rem;
  border-radius: 4px;
}
body.midnight .delete-group-button:hover {
  color: var(--danger-midnight);
  transform: scale(1.1);
}

body.midnight .group-name-input {
  color: var(--highlight-midnight);
  background: transparent;
  border: none;
  border-bottom: 1px dashed transparent;
  padding: 0.2rem 0;
  transition: border-color var(--transition-speed),
    color var(--transition-speed);
}
body.midnight .group-name-input:focus {
  outline: none;
  border-bottom: 1px dashed var(--highlight-midnight);
}

body.midnight #sort-selector {
  background-color: var(--bg-midnight-alt);
  color: var(--text-midnight);
  transition: background-color var(--transition-speed),
    border-color var(--transition-speed);
}
body.midnight #sort-selector:hover {
  background-color: var(--hover-midnight);
}
body.midnight #sort-selector:focus {
  outline: none;
  border-color: var(--highlight-midnight);
  background-color: #1e1e1e;
}

body.midnight .settings-grid label {
  color: var(--text-midnight);
}
body.midnight .settings-grid input[type="number"],
body.midnight .settings-grid select {
  background-color: var(--bg-midnight-alt);
  color: var(--text-midnight);
  transition: background-color var(--transition-speed),
    border-color var(--transition-speed);
}
body.midnight .settings-grid input[type="number"]:hover,
body.midnight .settings-grid select:hover {
  background-color: var(--hover-midnight);
}
body.midnight .settings-grid input[type="number"]:focus,
body.midnight .settings-grid select:focus {
  outline: none;
  border-color: var(--highlight-midnight);
  background-color: #1e1e1e;
}