/* --- Basic Setup & Variables --- */
:root {
  --bg-color: #f4f7f9;
  --panel-bg-color: #ffffff;
  --text-color: #333333;
  --border-color: #e0e0e0;
  --primary-color: #007bff;
  --primary-text-color: #ffffff;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --input-bg: #fdfdfd;
}

body.dark-mode {
  --bg-color: #1c2128;
  --panel-bg-color: #22272e;
  --text-color: #cdd9e5;
  --border-color: #444c56;
  --primary-color: #58a6ff;
  --primary-text-color: #1c2128;
  --input-bg: #2d333b;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
  padding: 20px;
}
.main-title {
  text-align: center;
  margin-bottom: 20px;
  color: var(--text-color);
}
.main-title h1 {
  font-weight: 600;
}

/* --- Layout & Panels --- */
.dashboard-container {
  display: flex;
  gap: 20px;
  max-width: 1400px;
  margin: 0 auto;
}
.panel {
  background-color: var(--panel-bg-color);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 25px;
  transition: background-color 0.3s;
}
.task-creator-panel {
  flex: 1;
  min-width: 320px;
}
.calendar-viewer-panel {
  flex: 1.5;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 15px;
}
form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* --- Form Elements --- */
fieldset {
  border: 1px solid var(--border-color);
  padding: 15px;
  border-radius: 8px;
}
legend {
  padding: 0 10px;
  font-weight: 600;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 8px;
}
input[type="text"],
select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background-color: var(--input-bg);
  color: var(--text-color);
  font-size: 1rem;
  cursor: pointer;
}
input.error,
select.error {
  border-color: #dc3545;
}
button,
.priority-selector label,
select,
#datePicker {
  cursor: pointer;
}
button {
  border: none;
  border-radius: 6px;
  padding: 10px 15px;
  font-size: 1rem;
  font-weight: 600;
  transition: background-color 0.2s, transform 0.1s;
}
button:active {
  transform: scale(0.98);
}

/* --- Specific Components --- */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  font-size: 0.8rem;
  padding: 5px 10px;
}
body.dark-mode .theme-toggle-btn {
  background-color: #2d333b;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background-color: var(--primary-color);
  color: var(--primary-text-color);
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: bold;
}
#taskList,
.date-time-wrapper,
.priority-selector {
  display: flex;
  gap: 10px;
}
.task-list-container {
  margin-bottom: 10px;
  flex-direction: column;
}
.task-row {
  align-items: center;
  gap: 12px;
} /* Increased gap */
.task-row .category-select,
.task-row .task-name-select,
.task-row .custom-task-input {
  flex: 1;
}
.remove-task-btn {
  background: none;
  color: #dc3545;
  font-size: 1.5rem;
  font-weight: bold;
  padding: 0 10px;
}
.add-task-btn {
  background-color: #e9ecef;
  color: #495057;
  border: 1px dashed var(--border-color);
}
body.dark-mode .add-task-btn {
  background-color: #2d333b;
  color: var(--text-color);
  border-color: var(--border-color);
}

.date-time-wrapper #datePicker {
  flex: 1 1 auto;
  padding-right: 35px;
}
.date-time-wrapper #timePicker {
  flex: 0 0 140px;
}
.date-picker-container {
  position: relative;
  flex: 1 1 auto;
}
.date-picker-icon {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-color);
  opacity: 0.6;
  pointer-events: none;
}

.priority-selector input[type="radio"] {
  display: none;
}
.priority-selector label {
  flex: 1;
  text-align: center;
  padding: 8px;
  border: 2px solid;
  border-radius: 6px;
  font-weight: 600;
  transition: all 0.2s;
}
.priority-selector label[for="prio-low"] {
  border-color: #28a745;
  color: #28a745;
}
.priority-selector label[for="prio-medium"] {
  border-color: #fd7e14;
  color: #fd7e14;
}
.priority-selector label[for="prio-high"] {
  border-color: #dc3545;
  color: #dc3545;
}
.priority-selector input[type="radio"]:checked + label {
  color: white;
}
.priority-selector input[type="radio"]:checked + label[for="prio-low"] {
  background-color: #28a745;
}
.priority-selector input[type="radio"]:checked + label[for="prio-medium"] {
  background-color: #fd7e14;
}
.priority-selector input[type="radio"]:checked + label[for="prio-high"] {
  background-color: #dc3545;
}

.send-btn {
  background-color: var(--primary-color);
  color: var(--primary-text-color);
  padding: 12px;
  font-size: 1.1rem;
}
.send-btn:disabled {
  background-color: #6c757d;
  cursor: not-allowed;
}
#feedbackMessage {
  text-align: center;
  font-weight: 600;
  padding: 10px;
  border-radius: 6px;
  visibility: hidden;
}
#feedbackMessage.success {
  background-color: #28a745;
  color: white;
  visibility: visible;
}
#feedbackMessage.error {
  background-color: #dc3545;
  color: white;
  visibility: visible;
}

/* --- Calendar Viewer --- */
.iframe-container {
  position: relative;
  flex-grow: 1;
  cursor: not-allowed;
}
.calendar-iframe {
  width: 100%;
  height: 100%;
  border-radius: 8px;
  filter: grayscale(40%) opacity(0.8);
  transition: filter 0.3s;
}
.iframe-container:hover .calendar-iframe {
  filter: grayscale(0%) opacity(1);
}
.readonly-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.3);
  color: white;
  font-size: 1.5rem;
  font-weight: bold;
  border-radius: 8px;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.iframe-container:hover .readonly-overlay {
  opacity: 1;
}
body.dark-mode .readonly-overlay {
  background-color: rgba(0, 0, 0, 0.5);
}
.hidden {
  display: none !important;
}

/* --- Mobile Responsiveness --- */
@media (max-width: 900px) {
  body {
    padding: 10px;
  }
  .dashboard-container,
  .date-time-wrapper {
    flex-direction: column;
  }
}