:root {
  --turquoise: #00C4B4;
  --dark-bg: #1a1a2e;
  --light-bg: #f0f2f5;
  --dark-sidebar: #162447;
  --light-sidebar: #ffffff;
  --dark-card: #1f2a50;
  --light-card: #ffffff;
  --dark-text: #e0e0e0;
  --light-text: #333333;
  --dark-heading: #ffffff;
  --light-heading: #1a1a2e;
  --dark-border: rgba(224, 224, 224, 0.1);
  --light-border: rgba(51, 51, 51, 0.15);
  --shadow-dark: rgba(0, 196, 180, 0.1);
  --shadow-light: rgba(0, 0, 0, 0.1);
  --sidebar-width: 260px;
  --sidebar-width-collapsed: 80px;
  --header-height: 70px;
  --transition-speed: 0.3s;
  --primary-font: 'Cairo', sans-serif;
  --button-hover-bg: #00a394;
  --input-bg-dark: #2a2a3e;
  --input-bg-light: #ffffff;
  --input-border-dark: #4a4a5e;
  --input-border-light: #ced4da;
  --error-color: #dc3545;
  --success-color: #28a745;
}

/* General Body Styling */
body {
  font-family: var(--primary-font);
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  overflow-x: hidden;
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

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

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

/* General Overrides & Common Components */

/* Headings */
h2, h3, h4, h5, h6 {
  transition: color var(--transition-speed) ease;
}

body.dark-mode h2, body.dark-mode h3, body.dark-mode h4, body.dark-mode h5, body.dark-mode h6 {
  color: var(--dark-heading);
}

body.light-mode h2, body.light-mode h3, body.light-mode h4, body.light-mode h5, body.light-mode h6 {
  color: var(--light-heading);
}

/* Forms */
.form-group {
  margin-bottom: 15px; /* Reduced for mobile */
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  transition: color var(--transition-speed) ease;
}

body.dark-mode .form-group label {
  color: var(--dark-text);
}

body.light-mode .form-group label {
  color: var(--light-text);
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="url"],
textarea,
select {
  width: 100%;
  max-width: 100%; /* Prevent overflow */
  padding: 10px 15px;
  border: 1px solid;
  border-radius: 6px;
  font-size: 1rem;
  font-family: var(--primary-font);
  transition: border-color var(--transition-speed), background-color var(--transition-speed), color var(--transition-speed);
}

body.dark-mode input[type="text"],
body.dark-mode input[type="password"],
body.dark-mode input[type="email"],
body.dark-mode input[type="number"],
body.dark-mode input[type="url"],
body.dark-mode textarea,
body.dark-mode select {
  background-color: var(--input-bg-dark);
  border-color: var(--input-border-dark);
  color: var(--dark-text);
}

body.light-mode input[type="text"],
body.light-mode input[type="password"],
body.light-mode input[type="email"],
body.light-mode input[type="number"],
body.light-mode input[type="url"],
body.light-mode textarea,
body.light-mode select {
  background-color: var(--input-bg-light);
  border-color: var(--input-border-light);
  color: var(--light-text);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--turquoise);
  box-shadow: 0 0 0 2px rgba(0, 196, 180, 0.3);
}

/* Buttons */
.btn {
  padding: 12px 24px; /* Increased for mobile */
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: background-color var(--transition-speed), color var(--transition-speed), opacity var(--transition-speed), transform 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 100px; /* Touch-friendly */
}

.btn i {
  margin: 0 !important; /* Reset icon margin within buttons */
}

.btn:hover {
  transform: scale(1.05); /* Subtle hover effect */
}

.btn-primary {
  background-color: var(--turquoise);
  color: white;
}

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

.btn-secondary {
  background-color: #6c757d;
  color: white;
}

.btn-secondary:hover {
  background-color: #5a6268;
}

.btn-success {
  background-color: var(--success-color);
  color: white;
}

.btn-success:hover {
  background-color: #218838;
}

.btn-danger {
  background-color: var(--error-color);
  color: white;
}

.btn-danger:hover {
  background-color: #c82333;
}

.btn-sm {
  padding: 8px 16px; /* Increased for mobile */
  font-size: 0.9rem;
  min-width: 80px; /* Touch-friendly */
}

button:disabled, .btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Input Groups (for copy buttons etc.) */
.input-group {
  display: flex;
  align-items: center;
  gap: 8px; /* Increased for mobile */
}

.input-group input[readonly],
.input-group textarea[readonly] {
  flex-grow: 1;
  background-color: rgba(128, 128, 128, 0.1);
}

.input-group button,
.input-group a.btn {
  flex-shrink: 0;
}

.code-group textarea {
  min-height: 80px;
  resize: vertical;
  font-family: monospace;
  font-size: 0.9em;
}

/* Cards */
.card {
  border-radius: 10px;
  padding: 20px;
  transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
  display: flex;
  flex-direction: column;
  height: 100%;
}

body.dark-mode .card {
  background: var(--dark-card);
  box-shadow: 0 4px 10px var(--shadow-dark);
  border: 1px solid var(--dark-border);
}

body.light-mode .card {
  background: var(--light-card);
  box-shadow: 0 4px 10px var(--shadow-light);
  border: 1px solid var(--light-border);
}

.card-body {
  flex-grow: 1;
}

.card-footer {
  margin-top: auto;
  padding-top: 15px;
  border-top: 1px solid;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

body.dark-mode .card-footer {
  border-top-color: var(--dark-border);
}

body.light-mode .card-footer {
  border-top-color: var(--light-border);
}

/* Grid Container for Cards */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

/* Specific card styles */
body.dark-mode .user-card, body.dark-mode .rule-card, body.dark-mode .feedback-card, body.dark-mode .conversation-card {
  /* Inherits from .card */
}

body.light-mode .user-card, body.light-mode .rule-card, body.light-mode .feedback-card, body.light-mode .conversation-card {
  /* Inherits from .card */
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}

thead {
  border-bottom: 2px solid;
}

body.dark-mode thead {
  border-bottom-color: var(--dark-border);
}

body.light-mode thead {
  border-bottom-color: var(--light-border);
}

th, td {
  padding: 12px 15px;
  text-align: right; /* RTL */
  border-bottom: 1px solid;
}

body.dark-mode th, body.dark-mode td {
  border-bottom-color: var(--dark-border);
}

body.light-mode th, body.light-mode td {
  border-bottom-color: var(--light-border);
}

th {
  font-weight: 700;
}

/* Switch Toggle */
.toggle-group {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--turquoise);
}

input:checked + .slider:before {
  transform: translateX(26px);
}

/* Error Messages */
.error-message {
  color: var(--error-color);
  background-color: rgba(220, 53, 69, 0.1);
  border: 1px solid rgba(220, 53, 69, 0.3);
  padding: 15px;
  border-radius: 6px;
  margin-bottom: 20px;
  max-width: 90vw; /* Prevent overflow */
  overflow-x: auto; /* Handle long content */
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px; /* Increased for mobile */
  margin-top: 25px;
}

.pagination button {
  padding: 10px 16px; /* Increased for mobile */
  border: 1px solid;
  background: none;
  cursor: pointer;
  border-radius: 4px;
  transition: background-color var(--transition-speed), color var(--transition-speed), transform 0.2s;
  font-size: 0.95em; /* Slightly smaller */
}

body.dark-mode .pagination button {
  color: var(--dark-text);
  border-color: var(--dark-border);
}

body.light-mode .pagination button {
  color: var(--light-text);
  border-color: var(--light-border);
}

.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination button.active {
  background-color: var(--turquoise);
  border-color: var(--turquoise);
  color: white;
  cursor: default;
}

body.dark-mode .pagination button:not(:disabled):not(.active):hover {
  background-color: var(--dark-card);
  transform: scale(1.05);
}

body.light-mode .pagination button:not(:disabled):not(.active):hover {
  background-color: #e9ecef;
  transform: scale(1.05);
}

.pagination span {
  padding: 0 5px;
}

/* Filters Bar */
.filters-bar {
  display: flex;
  gap: 15px;
  align-items: flex-end;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.filters-bar .form-group {
  margin-bottom: 0;
  flex-grow: 1;
  min-width: 150px;
}

.filters-bar .actions-group {
  flex-grow: 0;
  display: flex;
  gap: 10px;
}

/* Placeholder */
.placeholder {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - var(--header-height) - 100px);
  text-align: center;
  opacity: 0.7;
  max-width: 90vw; /* Prevent overflow */
}

.placeholder h2 {
  font-size: 2em;
  margin-bottom: 10px;
}

body.dark-mode .placeholder h2 {
  color: var(--dark-heading);
}

body.light-mode .placeholder h2 {
  color: var(--light-heading);
}

.placeholder.error p, .placeholder.error h2 {
  color: var(--error-color);
}

/* Spinner */
.spinner {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100px; /* Reduced for mobile */
}

.spinner[style*="display: none"] {
  min-height: 0;
}

.loader {
  border: 5px solid var(--light-border);
  border-top: 5px solid var(--turquoise);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
}

body.dark-mode .loader {
  border-color: var(--dark-border);
  border-top-color: var(--turquoise);
}

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

/* Responsive Adjustments */
@media (max-width: 768px) {
  .grid-container {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
  }
  .card {
    padding: 15px; /* Reduced for mobile */
  }
  .filters-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .form-group {
    margin-bottom: 12px;
  }
  input[type="text"],
  input[type="password"],
  input[type="email"],
  input[type="number"],
  input[type="url"],
  textarea,
  select {
    padding: 8px 12px; /* Reduced for mobile */
  }
  .btn {
    padding: 10px 20px;
    font-size: 0.95rem;
  }
  .btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
  }
  .pagination button {
    padding: 8px 14px;
    font-size: 0.9em;
  }
  .error-message {
    padding: 12px;
    font-size: 0.9em;
  }
}

@media (max-width: 576px) {
  .grid-container {
    grid-template-columns: minmax(100%, 1fr); /* Full width cards */
  }
  .card {
    padding: 12px;
  }
  .form-group {
    margin-bottom: 10px;
  }
  input[type="text"],
  input[type="password"],
  input[type="email"],
  input[type="number"],
  input[type="url"],
  textarea,
  select {
    font-size: 0.9rem;
  }
  .btn {
    padding: 8px 16px;
    font-size: 0.9rem;
    min-width: 90px;
  }
  .btn-sm {
    padding: 5px 10px;
    font-size: 0.8rem;
  }
  .pagination {
    gap: 6px;
  }
  .pagination button {
    padding: 6px 12px;
    font-size: 0.85em;
  }
  .spinner {
    min-height: 80px;
  }
}

@media (max-width: 360px) {
  .grid-container {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .card {
    padding: 10px;
  }
  .form-group label {
    font-size: 0.9em;
  }
  input[type="text"],
  input[type="password"],
  input[type="email"],
  input[type="number"],
  input[type="url"],
  textarea,
  select {
    padding: 6px 10px;
    font-size: 0.85rem;
  }
  .btn {
    padding: 6px 14px;
    font-size: 0.85rem;
    min-width: 80px;
  }
  .btn-sm {
    padding: 4px 8px;
    font-size: 0.8rem;
  }
  .error-message {
    padding: 10px;
    font-size: 0.85em;
  }
  .pagination button {
    padding: 5px 10px;
    font-size: 0.8em;
  }
}