static/styles.css

/* Global styles for both light and dark themes */
:root {
  --background-color-light: #f7f9fc;
  --text-color-light: #333;
  --panel-background-light: #ffffff;
  --button-background-light: #4a90e2;
  --button-hover-light: #357abd;
  --event-card-background-light: #f0f4fa;
  --event-card-border-left-light: #4a90e2;
  --modal-background-light: rgba(0, 0, 0, 0.4);
  --input-background-light: #ffffff;
  --input-border-light: #ccc;
  --input-text-light: #333;

  --background-color-dark: #181818;
  --text-color-dark: #e0e0e0;
  --panel-background-dark: #2e2e2e;
  --button-background-dark: #4a90e2;
  --button-hover-dark: #357abd;
  --event-card-background-dark: #252525;
  --event-card-border-left-dark: #4a90e2;
  --modal-background-dark: rgba(0, 0, 0, 0.6);
  --input-background-dark: #333;
  --input-border-dark: #444;
  --input-text-dark: #e0e0e0;
}

/* Default light theme */
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--background-color-light);
  color: var(--text-color-light);
}

.container {
  display: flex;
  flex-wrap: wrap;
  padding: 30px;
  gap: 30px;
  max-width: 1200px;
  margin: auto;
}

.left-panel,
.right-panel {
  flex: 1;
  min-width: 300px;
  background: var(--panel-background-light);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

h2, h3 {
  color: var(--text-color-light);
  margin-bottom: 16px;
}

input[type="text"],
input[type="datetime-local"],
button {
  width: 100%;
  margin: 8px 0 0 -12px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--input-border-light);
  font-size: 1rem;
  background-color: var(--input-background-light);
  color: var(--input-text-light);
}

button {
  background-color: var(--button-background-light);
  color: white;
  border: none;
  cursor: pointer;
  margin-inline: 0px;
  transition: background 0.3s ease;
}

button:hover {
  background-color: var(--button-hover-light);
}

#event-list {
  margin-top: 20px;
}

.event-card {
  background: var(--event-card-background-light);
  border-left: 6px solid var(--event-card-border-left-light);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.event-card h3 {
  margin: 0 0 8px 0;
  font-size: 1.2em;
}

.event-card p {
  margin: 4px 0;
}

.edit-btn, .delete-btn {
  margin-top: 8px;
  margin-right: 8px;
  background-color: #e2e8f0;
  color: #333;
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 0.9em;
}

.edit-btn:hover {
  background-color: #d0e2ff;
}

.delete-btn:hover {
  background-color: #ffe1e1;
}

.search-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  align-items: center;
}

.search-bar input[type="text"] {
  flex-grow: 1;
  min-width: 200px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--input-border-light);
  font-size: 1rem;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 100;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background-color: rgba(0, 0, 0, 0.4);
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: var(--panel-background-light);
  padding: 30px;
  border-radius: 16px;
  width: 90%;
  max-width: 400px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { transform: translateY(-20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Reminder styles */
.reminders {
  margin-top: 40px;
}

.reminder-item {
  background: var(--event-card-background-light);
  padding: 10px;
  border-radius: 8px;
  margin-bottom: 10px;
}

/* Styling the toggle switch */
.switch {
  --false: #63a2ff;
  --true: #373737;
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
}

input[type=checkbox] {
  appearance: none;
  height: 2.1rem;
  width: 3.5rem;
  background-color: #fafafa;
  position: relative;
  border: 1px royalblue solid;
  border-radius: 1em;
  cursor: pointer;
}

input[type=checkbox]::before {
  content: '';
  display: block;
  height: 1.9em;
  width: 1.9em;
  transform: translate(-50%, -50%);
  position: absolute;
  top: 50%;
  left: calc(1.9em / 2 + .3em);
  background-color: var(--false);
  border-radius: 1em;
  transition: .3s ease;
}

input[type=checkbox]:checked::before {
  background-color: var(--true);
  left: calc(100% - (1.9em / 2 + .3em));
}

/* Dark Theme */
[data-theme="dark"] {
  --background-color-light: var(--background-color-dark);
  --text-color-light: var(--text-color-dark);
  --panel-background-light: var(--panel-background-dark);
  --button-background-light: var(--button-background-dark);
  --button-hover-light: var(--button-hover-dark);
  --event-card-background-light: var(--event-card-background-dark);
  --event-card-border-left-light: var(--event-card-border-left-dark);
  --modal-background-light: var(--modal-background-dark);
  --input-background-light: var(--input-background-dark);
  --input-border-light: var(--input-border-dark);
  --input-text-light: var(--input-text-dark);
}