/* TempChat CSS Styles - Converted from Tailwind CSS */

/* Theme Variables */
:root {
  /* Gray Theme */
  --bg-primary: #1e1e1e;
  --bg-secondary: #252526;
  --bg-tertiary: #2d2d30;
  --text-primary: #cccccc;
  --text-secondary: #9d9d9d;
  --text-muted: #6a6a6a;
  --border-primary: #3e3e42;
  --accent-blue: #007acc;
  --accent-green: #4ec9b0;
  --accent-orange: #ce9178;
  --accent-red: #f44747;
  
  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(120, 200, 255, 0.02) 0%, transparent 50%);
  animation: subtleShift 30s ease-in-out infinite;
  color: var(--text-primary);
  line-height: 1.6;
  height: 100%;
  overflow-x: hidden;
}

#app {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header Styles */
.header {
  background-color: var(--bg-secondary);
  background-image: linear-gradient(135deg, rgba(0, 122, 204, 0.02) 0%, transparent 50%);
  border-bottom: 1px solid var(--border-primary);
  padding: 1rem;
  flex-shrink: 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-title {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--text-primary);
}

.header-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.online-users-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-tertiary);
  padding: 0.5rem 1rem;
  border-radius: 1rem;
  border: 1px solid var(--border-primary);
}

.online-indicator {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes subtleShift {
  0%, 100% {
    background-position: 0% 50%, 100% 50%, 50% 50%;
  }
  50% {
    background-position: 100% 50%, 0% 50%, 30% 70%;
  }
}

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

.online-count {
  color: var(--accent-green);
  font-weight: bold;
  font-size: 0.9rem;
}

.online-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.nav-link, .nav-button {
  padding: 0.5rem 1rem;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 0.5rem;
  border: 1px solid var(--border-primary);
  transition: all 0.2s ease;
  cursor: pointer;
  font-size: 0.9rem;
}

.nav-link:hover, .nav-button:hover {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
  color: white;
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 90% 90%, rgba(0, 122, 204, 0.01) 0%, transparent 50%),
    radial-gradient(circle at 10% 10%, rgba(78, 201, 176, 0.01) 0%, transparent 50%);
}

/* Tutorial Styles */
.tutorial-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.tutorial-overlay.hidden {
  display: none;
}

.tutorial-content {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 1rem;
  padding: 2rem;
  max-width: 500px;
  width: 90%;
}

.tutorial-step h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.tutorial-step p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.tutorial-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tutorial-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.tutorial-dots {
  display: flex;
  gap: 0.5rem;
}

.tutorial-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.tutorial-dot.active {
  background-color: var(--accent-blue);
}

.tutorial-btn {
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-primary);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.9rem;
}

.tutorial-btn.primary {
  background-color: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

.tutorial-btn.secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.tutorial-btn:hover {
  opacity: 0.9;
}

/* User Notifications */
.user-notifications {
  position: fixed;
  top: 100px;
  right: 1rem;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.user-notification {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  animation: slideIn 0.3s ease;
}

.user-notification.joining {
  border-left: 4px solid var(--accent-green);
}

.user-notification.leaving {
  border-left: 4px solid var(--accent-orange);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Messages Container */
.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  background-image: linear-gradient(45deg, rgba(78, 201, 176, 0.005) 0%, transparent 30%);
}

.messages-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Message Styles */
.message {
  background-color: var(--bg-secondary);
  background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.01) 0%, transparent 50%);
  border: 1px solid var(--border-primary);
  border-radius: 0.75rem;
  padding: 1rem;
  position: relative;
  backdrop-filter: blur(20px);
}

.message-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.message-author {
  color: var(--accent-blue);
  font-weight: 500;
  font-size: 0.9rem;
}

.message-time {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.message-content {
  color: var(--text-primary);
  word-wrap: break-word;
  line-height: 1.5;
}

.message-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-primary);
}

.delete-countdown {
  color: var(--accent-orange);
  font-size: 0.8rem;
  font-weight: 500;
}

.delete-countdown.urgent {
  color: var(--accent-red);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0.5; }
}

/* Image and Link Previews */
.message-image {
  margin-top: 0.5rem;
  border-radius: 0.5rem;
  max-width: 100%;
  height: auto;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.message-image:hover {
  opacity: 0.9;
}

.message-link {
  margin-top: 0.5rem;
  padding: 0.75rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 0.5rem;
  text-decoration: none;
  display: block;
  transition: background-color 0.2s ease;
}

.message-link:hover {
  background-color: var(--bg-primary);
}

.link-title {
  color: var(--accent-blue);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.link-url {
  color: var(--text-muted);
  font-size: 0.85rem;
  word-break: break-all;
}

/* Typing Indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
  color: var(--text-secondary);
  font-style: italic;
  max-width: 800px;
  margin: 0 auto;
}

.typing-animation {
  display: flex;
  gap: 2px;
}

.typing-animation span {
  width: 6px;
  height: 6px;
  background-color: var(--text-secondary);
  border-radius: 50%;
  animation: typing 1.4s infinite ease-in-out;
}

.typing-animation span:nth-child(1) { animation-delay: -0.32s; }
.typing-animation span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Message Input */
.message-input-container {
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
  flex-shrink: 0;
}

.upload-progress {
  margin-bottom: 1rem;
  padding: 0.75rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.upload-progress.hidden {
  display: none;
}

.upload-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.upload-bar {
  flex: 1;
  height: 4px;
  background-color: var(--bg-primary);
  border-radius: 2px;
  overflow: hidden;
  margin: 0 1rem;
}

.upload-bar-fill {
  height: 100%;
  background-color: var(--accent-blue);
  transition: width 0.3s ease;
  width: 0%;
}

.upload-cancel {
  background: none;
  border: none;
  color: var(--accent-red);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 0.25rem;
}

.message-form {
  max-width: 800px;
  margin: 0 auto;
}

.input-row {
  display: flex;
  gap: 0.75rem;
}

.input-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

#messageInput {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: 0.5rem;
  padding: 0.75rem;
  color: var(--text-primary);
  resize: none;
  min-height: 44px;
  max-height: 120px;
  font-family: inherit;
  font-size: 0.95rem;
}

#messageInput:focus {
  outline: none;
  border-color: var(--accent-blue);
}

#messageInput::placeholder {
  color: var(--text-muted);
}

.input-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.file-upload-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 1.2rem;
}

.file-upload-btn:hover {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.delete-time-selector select {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: 0.5rem;
  padding: 0.75rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  min-width: 150px;
}

.delete-time-selector select:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.send-button {
  background-color: var(--accent-blue);
  color: white;
  border: none;
  border-radius: 0.5rem;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
  min-height: 44px;
}

.send-button:hover:not(:disabled) {
  background-color: var(--accent-blue);
  opacity: 0.9;
}

.send-button:disabled {
  background-color: var(--bg-tertiary);
  color: var(--text-muted);
  cursor: not-allowed;
}

/* Image Modal */
.image-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.image-modal.hidden {
  display: none;
}

.image-modal-content {
  position: relative;
  max-width: 90%;
  max-height: 90%;
}

.image-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 0.5rem;
}

#modalImage {
  max-width: 100%;
  max-height: 100%;
  border-radius: 0.5rem;
}

/* Notes Styles */
.notes-controls {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  flex-wrap: wrap;
  align-items: center;
}

.search-container {
  position: relative;
  flex: 1;
  min-width: 250px;
}

.search-input {
  width: 100%;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: 0.5rem;
  padding: 0.75rem 2.5rem 0.75rem 1rem;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-icon {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.filter-container,
.sort-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-select,
.sort-select {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: 0.5rem;
  padding: 0.75rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  min-width: 150px;
}

.filter-select:focus,
.sort-select:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.notes-container {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  background-image: linear-gradient(180deg, rgba(120, 119, 198, 0.01) 0%, transparent 20%);
}

.notes-list {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.note-card {
  background-color: var(--bg-secondary);
  background-image: linear-gradient(135deg, rgba(0, 122, 204, 0.02) 0%, transparent 30%);
  border: 1px solid var(--border-primary);
  border-radius: 0.75rem;
  padding: 1.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  height: fit-content;
}

.note-card:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--accent-blue);
}

.note-card-header {
  margin-bottom: 1rem;
}

.note-card-title {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.note-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.note-category {
  background-color: var(--accent-blue);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.8rem;
  font-weight: 500;
}

.note-author {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.note-date {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.note-preview {
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 1rem;
}

.note-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.note-tag {
  background-color: var(--accent-blue);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 0.75rem;
  font-size: 0.75rem;
  border: 1px solid var(--accent-blue);
}

.note-tag.no-tags {
  background-color: var(--text-muted);
  border-color: var(--text-muted);
  opacity: 0.6;
}

/* Note Modals */
.note-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.note-modal.hidden {
  display: none;
}

.note-modal-content {
  background-color: var(--bg-secondary);
  background-image: radial-gradient(circle at 10% 20%, rgba(78, 201, 176, 0.02) 0%, transparent 50%);
  border: 1px solid var(--border-primary);
  border-radius: 1rem;
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
}

.note-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-primary);
  gap: 1rem;
}

.note-info h2 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 1.5rem;
}

.note-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.note-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.action-btn {
  background: none;
  border: 1px solid var(--border-primary);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 1rem;
}

.action-btn:hover {
  background-color: var(--bg-tertiary);
}

.action-btn.delete:hover {
  background-color: var(--accent-red);
  border-color: var(--accent-red);
  color: white;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

.modal-close:hover {
  color: var(--text-primary);
}

/* Note Form */
.note-form {
  padding: 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: 0.5rem;
  padding: 0.75rem;
  color: var(--text-primary);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-actions {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  padding-top: 1rem;
  border-top: 1px solid var(--border-primary);
}

.btn-primary, .btn-secondary {
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
  border: 1px solid var(--border-primary);
}

.btn-primary {
  background-color: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--bg-primary);
}

/* Note Content Viewer */
.note-viewer .note-content {
  padding: 1.5rem;
}

.note-text {
  color: var(--text-primary);
  line-height: 1.6;
  white-space: pre-wrap;
  margin-bottom: 1rem;
}

.note-text-full {
  color: var(--text-primary);
  line-height: 1.6;
  white-space: pre-wrap;
  margin-bottom: 1rem;
  font-size: 1rem;
}

.note-text-full a {
  color: var(--accent-blue);
  text-decoration: underline;
}

.note-text-full a:hover {
  color: var(--accent-green);
}

.note-links {
  border-top: 1px solid var(--border-primary);
  padding-top: 1rem;
}

.note-links h4 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.note-links a {
  color: var(--accent-blue);
  text-decoration: none;
  display: block;
  margin-bottom: 0.25rem;
}

.note-links a:hover {
  text-decoration: underline;
}

/* Tag System Styles */
.tags-container {
  width: 100%;
}

.predefined-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tag-option {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  border-radius: 1rem;
  border: 1px solid var(--border-primary);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.85rem;
  user-select: none;
}

.tag-option:hover {
  background-color: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

.tag-option.selected {
  background-color: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

.custom-tags-input {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.custom-tags-input input {
  flex: 1;
}

.add-tag-btn {
  background-color: var(--accent-green);
  color: white;
  border: none;
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.add-tag-btn:hover {
  opacity: 0.9;
}

.selected-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  min-height: 2rem;
  padding: 0.5rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: 0.5rem;
}

.selected-tag {
  background-color: var(--accent-blue);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 0.75rem;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.remove-tag {
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
  margin-left: 0.25rem;
}

.remove-tag:hover {
  opacity: 0.7;
}

/* Loading Indicator */
.loading-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 2rem;
  color: var(--text-secondary);
}

.loading-indicator.hidden {
  display: none;
}

.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-primary);
  border-top: 2px solid var(--accent-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Utility Classes */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.text-muted {
  color: var(--text-muted);
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  
  .header-right {
    width: 100%;
    justify-content: space-between;
  }
  
  .notes-controls {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .search-container {
    min-width: auto;
  }
  
  .filter-container,
  .sort-container {
    width: 100%;
  }
  
  .filter-select,
  .sort-select {
    min-width: auto;
    width: 100%;
  }
  
  .messages-container {
    padding: 0.5rem;
  }
  
  .message {
    padding: 0.75rem;
  }
  
  .message-input-container {
    padding: 0.75rem;
  }
  
  .input-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }
  
  .delete-time-selector select {
    min-width: auto;
  }
  
  .notes-list {
    grid-template-columns: 1fr;
    padding: 0.5rem;
  }
  
  .note-modal-content {
    margin: 0.5rem;
    max-height: calc(100vh - 1rem);
  }
  
  .note-modal-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .note-actions {
    align-self: flex-end;
  }
  
  .form-actions {
    flex-direction: column-reverse;
  }
  
  .user-notifications {
    right: 0.5rem;
    left: 0.5rem;
  }
}

@media (max-width: 480px) {
  .header {
    padding: 0.75rem;
  }
  
  .header-title {
    font-size: 1.25rem;
  }
  
  .tutorial-content {
    padding: 1.5rem;
  }
  
  .message-input-container .input-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }
  
  .send-button {
    flex: 1;
    min-width: 80px;
  }
}