:root {
  --bg-color: #f5f5f5;
  --text-color: #333;
  --card-bg: white;
  --card-shadow: rgba(0, 0, 0, 0.1);
  --accent-color: #4a69bd;
  --accent-hover: #3c5aa6;
  --error-color: #e74c3c;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --border-color: #ddd;
  --text-light: #555;
  --text-lighter: #6c757d;
  --sidebar-bg: #f8f9fa;
  --border-subtle: #e9ecef;
  --placeholder-bg: #eee;
  --published-badge-bg: #28a745;
  --spinner-border: #f3f3f3;
  --chat-bg: #e3efff;
  --note-active-bg: #e3efff;
  --note-active-border: #4a69bd;
  --note-hover-bg: #e9ecef;
  --preview-bg: #f6f8fa;
  --code-bg: rgba(27,31,35,0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --card-shadow: rgba(0, 0, 0, 0.3);
    --accent-color: #5d7dd8;
    --accent-hover: #6b88e7;
    --error-color: #e74c3c;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --border-color: #333;
    --text-light: #b0b0b0;
    --text-lighter: #909090;
    --sidebar-bg: #252525;
    --border-subtle: #333;
    --placeholder-bg: #333;
    --published-badge-bg: #2ecc71;
    --spinner-border: #333;
    --chat-bg: #2c3e50;
    --note-active-bg: #2c3e50;
    --note-active-border: #5d7dd8;
    --note-hover-bg: #2a2a2a;
    --preview-bg: #252525;
    --code-bg: rgba(200,200,200,0.1);
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.container {
  width: 100%;
  max-width: 1000px;
}

.card {
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 4px 6px var(--card-shadow);
  padding: 30px;
  margin-bottom: 20px;
}

h1 {
  color: var(--text-color);
  margin-bottom: 24px;
  text-align: center;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-light);
}

.form-control {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 16px;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.btn {
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 4px;
  padding: 12px 20px;
  font-size: 16px;
  cursor: pointer;
  width: 100%;
  transition: background-color 0.3s;
}

.btn:hover {
  background-color: var(--accent-hover);
}

.hidden {
  display: none;
}

.error-message {
  color: var(--error-color);
  margin-top: 10px;
  text-align: center;
  font-weight: 500;
}

.input-error {
  border-color: #e74c3c !important;
  box-shadow: 0 0 0 2px rgba(231, 76, 60, 0.25);
  animation: shake 0.4s 1;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-5px); }
  40%, 80% { transform: translateX(5px); }
}

#admin-content {
  background-color: var(--sidebar-bg);
  border-radius: 4px;
  padding: 15px;
  margin: 20px 0;
  min-height: 150px;
}

#logout-button {
  background-color: #e74c3c;
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: auto;
  padding: 8px 15px;
  font-size: 14px;
  z-index: 100;
  opacity: 0.7;
}

#logout-button:hover {
  background-color: #c0392b;
  opacity: 1;
}

/* Loading spinner */
.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--spinner-border);
  border-top: 4px solid var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 15px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* App Selection Grid */
.app-selection {
  margin-top: 30px;
}

.app-selection h3 {
  margin-bottom: 15px;
  text-align: center;
  color: #444;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
  margin-top: 20px;
}

.app-item {
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 5px var(--card-shadow);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.app-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.app-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

.app-name {
  font-weight: 500;
  color: var(--text-color);
}

/* App Pages */
.app-page {
  padding: 5px;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-color);
  z-index: 50;
}

.app-header {
  display: flex;
  align-items: center;
  padding: 15px;
  background-color: var(--card-bg);
  box-shadow: 0 2px 4px var(--card-shadow);
}

.app-header h2 {
  margin: 0;
  flex-grow: 1;
  text-align: center;
  margin-right: 40px; /* Offset for back button to center title */
}

.back-button {
  background: none;
  border: none;
  color: #4a69bd;
  font-size: 16px;
  cursor: pointer;
  padding: 5px 10px;
  font-weight: 500;
}

.back-button:hover {
  text-decoration: underline;
}

.app-content {
  padding: 10px;
  height: calc(100vh - 60px);
  overflow: auto;
}

.placeholder-content {
  margin-top: 20px;
}

.placeholder-item {
  height: 50px;
  background-color: #eee;
  border-radius: 4px;
  margin-bottom: 15px;
}

/* Chat styling */
.chat-placeholder .chat-message {
  padding: 15px;
  border-radius: 10px;
  margin-bottom: 15px;
  background-color: #eee;
  width: 70%;
}

.chat-message.left {
  align-self: flex-start;
}

.chat-message.right {
  align-self: flex-end;
  margin-left: auto;
  background-color: #e3efff;
}

/* Photos styling */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.photo-placeholder {
  background-color: #eee;
  border-radius: 4px;
  height: 100px;
}

/* Cards styling */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
}

.card-placeholder {
  background-color: #eee;
  border-radius: 8px;
  height: 120px;
}

/* Notes App specific styles */
.notes-container {
  display: flex;
  height: calc(100vh - 100px); /* Dynamic height based on viewport */
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 10px var(--card-shadow);
  background-color: var(--card-bg);
  margin-top: 15px;
}

.notes-sidebar {
  width: 20%;
  background-color: var(--sidebar-bg);
  border-right: 1px solid var(--border-subtle);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.notes-sidebar-header {
  padding: 15px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.notes-sidebar-title {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}

.add-note-btn {
  background-color: #4a69bd;
  color: white;
  border: none;
  border-radius: 4px;
  width: 30px;
  height: 30px;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.notes-list {
  flex-grow: 1;
  overflow-y: auto;
}

.note-item {
  padding: 15px;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background-color 0.2s;
}

.note-item:hover {
  background-color: var(--note-hover-bg);
}

.note-item.active {
  background-color: var(--note-active-bg);
  border-left: 3px solid var(--note-active-border);
}

.note-title {
  font-weight: 600;
  margin-bottom: 5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.note-preview {
  font-size: 13px;
  color: #6c757d;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.note-meta-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 5px;
}

.note-meta {
  font-size: 11px;
  color: #adb5bd;
}

.published-badge {
  font-size: 10px;
  color: white;
  background-color: #28a745;
  padding: 2px 6px;
  border-radius: 10px;
  cursor: help;
}

.notes-content {
  width: 40%;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-subtle);
  background-color: var(--card-bg);
}

.notes-preview {
  width: 40%;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  background-color: var(--card-bg);
}

.preview-header {
  padding: 15px;
  border-bottom: 1px solid var(--border-subtle);
  font-weight: 600;
  color: var(--text-lighter);
}

.preview-content {
  padding: 15px;
  flex-grow: 1;
  overflow-y: auto;
}

/* Markdown preview styles */
.preview-content h1, .preview-content h2, .preview-content h3, 
.preview-content h4, .preview-content h5, .preview-content h6 {
  margin-top: 1em;
  margin-bottom: 0.5em;
  font-weight: 600;
  line-height: 1.25;
}

.preview-content h1 { font-size: 2em; }
.preview-content h2 { font-size: 1.5em; }
.preview-content h3 { font-size: 1.25em; }

.preview-content p {
  margin-top: 0;
  margin-bottom: 16px;
}

.preview-content ul, .preview-content ol {
  padding-left: 2em;
  margin-top: 0;
  margin-bottom: 16px;
}

.preview-content blockquote {
  padding: 0 1em;
  color: #6a737d;
  border-left: 0.25em solid #dfe2e5;
  margin: 0 0 16px 0;
}

.preview-content pre {
  padding: 16px;
  overflow: auto;
  font-size: 85%;
  line-height: 1.45;
  background-color: #f6f8fa;
  border-radius: 3px;
  margin-top: 0;
  margin-bottom: 16px;
}

.preview-content code {
  padding: 0.2em 0.4em;
  margin: 0;
  font-size: 85%;
  background-color: rgba(27,31,35,0.05);
  border-radius: 3px;
}

.preview-content pre code {
  padding: 0;
  background-color: transparent;
}

.notes-editor-header {
  padding: 15px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.save-status {
  display: flex;
  align-items: center;
  font-size: 13px;
  color: var(--text-lighter);
}

.note-publish-controls {
  display: flex;
  padding: 10px 15px;
  border-bottom: 1px solid var(--border-subtle);
  align-items: center;
  background-color: var(--sidebar-bg);
}

.url-field-container {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  margin-right: 15px;
}

.url-field-container > div {
  display: flex;
  align-items: center;
}

.url-field-container label {
  margin-bottom: 0;
  margin-right: 10px;
  font-weight: 500;
  min-width: 40px;
}

.url-warning {
  color: #e74c3c;
  font-size: 12px;
  margin-top: 4px;
  margin-left: 42px;
}

.note-url-input {
  flex-grow: 1;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 14px;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.publish-toggle-container {
  display: flex;
  align-items: center;
}

.publish-toggle-container label {
  display: flex;
  align-items: center;
  margin-bottom: 0;
  cursor: pointer;
}

.publish-toggle {
  margin-right: 6px;
  height: 16px;
  width: 16px;
}

.published-url-preview {
  padding: 8px 15px;
  background-color: var(--chat-bg);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 14px;
}

.published-url-preview a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
}

.published-url-preview a:hover {
  text-decoration: underline;
}

.published-copy-link {
  display: flex;
  align-items: center;
  margin-top: 8px;
}

.copy-link-btn {
  background-color: #4a69bd;
  color: white;
  border: none;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
}

.copy-link-btn:hover {
  background-color: #3c5aa6;
}

.copy-status {
  color: #28a745;
  font-size: 12px;
  margin-left: 8px;
}

.save-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
}

.save-indicator.saved {
  background-color: #28a745;
}

.save-indicator.saving {
  background-color: #ffc107;
  animation: pulse 1s infinite;
}

.save-indicator.error {
  background-color: #dc3545;
}

@keyframes pulse {
  0% { opacity: 0.5; }
  50% { opacity: 1; }
  100% { opacity: 0.5; }
}

.note-title-input {
  width: 100%;
  padding: 10px 15px;
  font-size: 18px;
  border: none;
  border-bottom: 1px solid var(--border-subtle);
  outline: none;
  font-weight: 600;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.note-content-area {
  flex-grow: 1;
  padding: 15px;
  border: none;
  resize: none;
  outline: none;
  font-family: inherit;
  font-size: 16px;
  line-height: 1.6;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.notes-empty-state {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  color: #6c757d;
}

.notes-empty-icon {
  font-size: 48px;
  margin-bottom: 15px;
  color: #dee2e6;
}

.notes-empty-message {
  font-size: 18px;
  margin-bottom: 20px;
}

.loading-notes {
  padding: 20px;
  text-align: center;
}

/* Workouts App specific styles */
.workout-tabs {
  display: flex;
  margin-top: 15px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 0;
}

.tab-btn {
  padding: 10px 20px;
  background-color: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-lighter);
  transition: all 0.2s;
}

.tab-btn:hover {
  color: var(--accent-color);
}

.tab-btn.active {
  color: var(--accent-color);
  border-bottom: 2px solid var(--accent-color);
}

.workouts-container {
  display: flex;
  height: calc(100vh - 145px);
  border-radius: 0 0 8px 8px;
  overflow: hidden;
  box-shadow: 0 4px 10px var(--card-shadow);
  background-color: var(--card-bg);
}

.workout-tab-content {
  display: flex;
  width: 100%;
  height: 100%;
}

.workout-tab-content.hidden {
  display: none;
}

.workouts-sidebar {
  width: 20%;
  background-color: var(--sidebar-bg);
  border-right: 1px solid var(--border-subtle);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.workouts-sidebar-header {
  padding: 15px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.workouts-sidebar-title {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}

.add-workout-btn {
  background-color: #4a69bd;
  color: white;
  border: none;
  border-radius: 4px;
  width: 30px;
  height: 30px;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.workouts-list {
  flex-grow: 1;
  overflow-y: auto;
}

.workout-item {
  padding: 15px;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background-color 0.2s;
}

.workout-item:hover {
  background-color: var(--note-hover-bg);
}

.workout-item.active {
  background-color: var(--note-active-bg);
  border-left: 3px solid var(--note-active-border);
}

.workout-date {
  font-weight: 600;
  margin-bottom: 5px;
}

.workout-preview {
  font-size: 13px;
  color: #6c757d;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.workout-details {
  width: 80%;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  background-color: var(--card-bg);
}

.workout-graph-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.graph-header {
  padding: 15px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.graph-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

#exercise-select {
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 14px;
  min-width: 150px;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.graph-container {
  padding: 30px;
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.no-data-message {
  color: #6c757d;
  font-size: 16px;
  text-align: center;
}

.workout-form {
  padding: 15px;
}

.workout-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.workout-date-container {
  display: flex;
  align-items: center;
}

.workout-date-container label {
  margin-right: 10px;
  margin-bottom: 0;
}

#workout-date {
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 14px;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.workout-actions {
  display: flex;
  gap: 10px;
}

.save-workout-btn, .delete-workout-btn {
  padding: 8px 15px;
  border: none;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
}

.save-workout-btn {
  background-color: #28a745;
  color: white;
}

.delete-workout-btn {
  background-color: #dc3545;
  color: white;
}

.notes-section {
  margin-bottom: 20px;
}

.notes-section label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

#workout-notes {
  width: 100%;
  height: 80px;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  resize: vertical;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.exercises-section {
  margin-bottom: 20px;
}

.exercises-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.exercises-header h3 {
  margin: 0;
  font-weight: 600;
}

.add-exercise-btn {
  background-color: #4a69bd;
  color: white;
  border: none;
  border-radius: 4px;
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
}

.exercise-item {
  background-color: var(--sidebar-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 15px;
  margin-bottom: 15px;
}

.exercise-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.exercise-name {
  flex-grow: 1;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  margin-right: 10px;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.remove-exercise-btn {
  background-color: #dc3545;
  color: white;
  border: none;
  border-radius: 50%;
  width: 25px;
  height: 25px;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  line-height: 1;
}

.exercise-details {
  display: flex;
  align-items: center;
  gap: 20px;
}

.set-rep-section, .weight-section {
  display: flex;
  align-items: center;
}

.exercise-sets, .exercise-reps {
  width: 60px;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 14px;
  text-align: center;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.set-rep-section span {
  margin: 0 8px;
  color: var(--text-lighter);
}

.exercise-weight {
  width: 80px;
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 14px;
  text-align: center;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.weight-section span {
  margin-left: 8px;
  color: var(--text-lighter);
}

.workouts-empty-state {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  color: #6c757d;
}

.workouts-empty-icon {
  font-size: 48px;
  margin-bottom: 15px;
  color: #dee2e6;
}

.workouts-empty-message {
  font-size: 18px;
  margin-bottom: 20px;
}

.loading-workouts {
  padding: 20px;
  text-align: center;
}

/* Responsive design */
@media (max-width: 768px) {
  .notes-container, .workouts-container {
    flex-direction: column;
    height: 800px;
  }
  
  .notes-sidebar, .notes-content, .notes-preview,
  .workouts-sidebar, .workout-details, .workout-graph-container {
    width: 100%;
    height: 33.333%;
  }
}