/* AI Email Assistant - Apple-Inspired Design */

:root {
  /* Light Mode Colors - Apple Inspired */
  --bg-primary: #f5f5f7;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.8);
  --bg-elevated: rgba(255, 255, 255, 0.95);
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #86868b;
  --text-muted: #a1a1a6;
  --border-color: rgba(0, 0, 0, 0.06);
  --border-light: rgba(0, 0, 0, 0.04);
  --accent: #007aff;
  --accent-hover: #0051d5;
  --accent-light: rgba(0, 122, 255, 0.1);
  --btn-primary-bg: #007aff;
  --btn-primary-text: #ffffff;
  --btn-secondary-bg: rgba(0, 0, 0, 0.04);
  --btn-secondary-text: #1d1d1f;
  --success: #34c759;
  --error: #ff3b30;
  --warning: #ff9500;
  --info: #007aff;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.06);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-pill: 9999px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.1, 1);
  --blur-glass: blur(20px);
}

[data-theme="dark"] {
  /* Dark Mode Colors - Apple Inspired */
  --bg-primary: #000000;
  --bg-secondary: #1c1c1e;
  --bg-card: rgba(28, 28, 30, 0.8);
  --bg-elevated: rgba(44, 44, 46, 0.95);
  --text-primary: #f5f5f7;
  --text-secondary: #98989d;
  --text-tertiary: #86868b;
  --text-muted: #6e6e73;
  --border-color: rgba(255, 255, 255, 0.1);
  --border-light: rgba(255, 255, 255, 0.06);
  --accent: #0a84ff;
  --accent-hover: #409cff;
  --accent-light: rgba(10, 132, 255, 0.15);
  --btn-primary-bg: #0a84ff;
  --btn-secondary-bg: rgba(255, 255, 255, 0.08);
  --btn-secondary-text: #f5f5f7;
  --success: #32d74b;
  --error: #ff453a;
  --warning: #ff9f0a;
  --info: #0a84ff;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.5), 0 4px 8px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: background var(--transition-smooth), color var(--transition-smooth);
  min-width: 360px;
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  position: relative;
}

/* Sidebar Toggle Button */
.sidebar-toggle {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 1001;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-primary);
}

.sidebar-toggle:hover {
  background: var(--btn-secondary-bg);
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.sidebar-toggle:active {
  transform: scale(0.98);
}

.sidebar-toggle .icon {
  font-size: 16px;
}

/* Settings Sidebar */
.settings-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 480px;
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.settings-sidebar.open {
  transform: translateX(0);
}

.sidebar-header {
  position: sticky;
  top: 0;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-color);
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
}

.sidebar-header h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sidebar-close {
  background: var(--btn-secondary-bg);
  border: none;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: 18px;
  font-weight: 600;
  transition: all var(--transition-fast);
  color: var(--text-primary);
}

.sidebar-close:hover {
  background: var(--btn-secondary-bg);
  transform: scale(1.1);
}

.sidebar-close:active {
  transform: scale(0.95);
}

.sidebar-content {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  overflow-x: hidden;
}

/* Main Content Area */
.main-content {
  margin-left: 0;
  padding: 14px;
  transition: margin-left var(--transition-normal);
  min-height: 100vh;
}

.settings-sidebar.open ~ .main-content {
  margin-left: 480px;
}

/* Backdrop for mobile */
.sidebar-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.sidebar-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

h1 {
  font-size: 22px;
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Theme Toggle */
.theme-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: 16px;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
}

.theme-toggle:hover {
  background: var(--btn-secondary-bg);
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.theme-toggle:active {
  transform: scale(0.98);
}

/* Layout */
.row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 10px 0;
}

.col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
  margin: 16px 0;
}

/* Form Elements */
select, input, textarea, button {
  font: inherit;
  transition: all var(--transition-fast);
}

select, input, textarea {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  outline: none;
  font-size: 14px;
  letter-spacing: -0.01em;
}

select:focus, input:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light);
  background: var(--bg-elevated);
}

select:hover, input:hover, textarea:hover {
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

input[type="password"] {
  font-family: -apple-system, BlinkMacSystemFont, monospace;
  letter-spacing: 0.1em;
}

textarea {
  width: 100%;
  min-height: 180px;
  resize: vertical;
  padding: 14px;
  line-height: 1.6;
  border-radius: var(--radius-lg);
}

/* Input wrapper for clear button */
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper input {
  flex: 1;
  padding-right: 40px;
}

.input-wrapper .toggle-password,
.input-wrapper .clear-input {
  position: absolute;
  right: 10px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  opacity: 0.5;
  font-size: 16px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.input-wrapper .toggle-password:hover,
.input-wrapper .clear-input:hover {
  opacity: 1;
  background: var(--btn-secondary-bg);
  transform: scale(1.1);
}

.input-wrapper .toggle-password:active,
.input-wrapper .clear-input:active {
  transform: scale(0.95);
}

/* Textarea wrapper */
.textarea-wrapper {
  position: relative;
}

.textarea-wrapper textarea {
  width: 100%;
}

.char-count {
  position: absolute;
  bottom: 12px;
  right: 12px;
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  pointer-events: none;
  font-weight: 500;
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  box-shadow: var(--shadow-sm);
}

.char-count.warning {
  color: var(--warning);
  background: rgba(255, 149, 0, 0.1);
}

.char-count.error {
  color: var(--error);
  background: rgba(255, 59, 48, 0.1);
}

.clear-textarea {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--bg-card);
  border: none;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  opacity: 0.8;
  transition: all var(--transition-fast);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  box-shadow: var(--shadow-sm);
}

.clear-textarea:hover {
  opacity: 1;
  background: var(--btn-secondary-bg);
  transform: scale(1.05);
}

.clear-textarea:active {
  transform: scale(0.95);
}

/* Buttons */
.btn {
  padding: 6px 12px;
  border: none;
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  transition: all var(--transition-fast);
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
  letter-spacing: -0.01em;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background: var(--btn-secondary-bg);
  filter: brightness(1.05);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  filter: none;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: var(--btn-primary-text);
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.btn.primary:hover:not(:disabled) {
  box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
  transform: translateY(-2px);
}

.btn.primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.3);
}

.btn.success {
  background: linear-gradient(135deg, var(--success) 0%, #28a745 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(52, 199, 89, 0.3);
}

.btn.danger {
  background: linear-gradient(135deg, var(--error) 0%, #dc3545 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(255, 59, 48, 0.3);
}

.btn.small {
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
}

.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-group.full-width {
  width: 100%;
}

.btn-group.full-width .btn {
  flex: 1;
  min-width: 0;
}

/* Status Messages */
.status {
  font-size: 12px;
  color: var(--text-tertiary);
  min-height: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  font-weight: 500;
}

.status.success {
  color: var(--success);
}

.status.error {
  color: var(--error);
}

.status.info {
  color: var(--info);
}

.status.warning {
  color: var(--warning);
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Output Box */
.out {
  white-space: pre-wrap;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 16px;
  min-height: 140px;
  max-height: 400px;
  overflow-y: auto;
  line-height: 1.7;
  transition: all var(--transition-normal);
  animation: fadeIn var(--transition-normal);
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  letter-spacing: -0.01em;
}

.out:empty::before {
  content: "Response will appear here...";
  color: var(--text-muted);
  font-style: italic;
  font-size: 14px;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.output-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}

/* History Navigation */
.history-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
  background: var(--bg-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}

.history-controls .btn {
  padding: 4px 10px;
  font-size: 12px;
  min-width: 32px;
}

/* Settings Panel */
details {
  margin-bottom: 12px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  width: 100%;
}

.sidebar-content details {
  max-width: 100%;
}

summary {
  cursor: pointer;
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 14px;
  transition: all var(--transition-fast);
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
}

summary::-webkit-details-marker {
  display: none;
}

summary:hover {
  background: var(--bg-elevated);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

summary:active {
  transform: translateY(0);
}

details[open] summary {
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  border-bottom: none;
  margin-bottom: 0;
  background: var(--bg-elevated);
}

details > div {
  padding: 16px;
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  background: var(--bg-card);
  animation: slideDown var(--transition-normal);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  width: 100%;
  box-sizing: border-box;
  overflow-x: hidden;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 600px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.card {
  border: 1px solid var(--border-color);
  padding: 12px;
  border-radius: var(--radius-lg);
  margin: 8px 0;
  background: var(--bg-elevated);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  width: 100%;
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--border-light);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.02em;
}

.card .row {
  margin: 8px 0;
}

.card .row .input-wrapper {
  flex: 1;
  min-width: 0;
}

.card .row input:not(.input-wrapper input) {
  flex: 1;
  min-width: 0;
}

.card .row select {
  flex: 1;
  min-width: 0;
}

.card label {
  min-width: 90px;
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  flex-shrink: 0;
}

/* Key Status Indicator */
.key-status {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.key-status.configured {
  background: linear-gradient(135deg, rgba(52, 199, 89, 0.15), rgba(52, 199, 89, 0.1));
  color: var(--success);
}

.key-status.missing {
  background: linear-gradient(135deg, rgba(255, 59, 48, 0.15), rgba(255, 59, 48, 0.1));
  color: var(--error);
}

/* Provider Selector */
.provider-row {
  display: flex;
  gap: 8px;
  align-items: center;
  background: var(--bg-card);
  padding: 8px 10px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
}

.provider-row label {
  min-width: auto;
  font-weight: 600;
  font-size: 13px;
}

.provider-row select {
  flex: 1;
  min-width: 140px;
  font-size: 13px;
  padding: 6px 10px;
}

.provider-row input {
  flex: 1;
  font-size: 13px;
  padding: 6px 10px;
}

.provider-hint {
  font-size: 11px;
  color: var(--text-muted);
  padding: 4px 10px;
  background: var(--accent-light);
  border-radius: var(--radius-md);
  margin-top: 4px;
  font-weight: 500;
}

/* Quick Actions / Operation Modes */
.quick-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 8px 0;
}

.quick-actions .btn {
  flex: 1;
  min-width: 110px;
  font-size: 12px;
  padding: 5px 10px;
}

/* Operations Grid */
.operations-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin: 8px 0;
}

.operations-grid .btn {
  font-size: 12px;
  padding: 5px 8px;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.operations-grid .btn span {
  font-size: 14px;
}

.operations-grid .btn.primary {
  grid-column: span 3;
}

@media (max-width: 480px) {
  .operations-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* System Prompt Selector */
.prompt-preset {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 12px 0;
}

.prompt-preset label {
  flex-shrink: 0;
  min-width: auto;
}

.prompt-preset select {
  flex: 1;
  min-width: 0;
}

.custom-prompt {
  margin: 12px 0;
}

.custom-prompt textarea {
  min-height: 80px;
  font-size: 13px;
  width: 100%;
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  animation: slideInRight 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  max-width: 320px;
  z-index: 1000;
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  font-weight: 500;
  font-size: 14px;
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--error);
}

.toast.info {
  border-left: 4px solid var(--info);
}

@keyframes slideInRight {
  from { transform: translateX(400px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Links */
.link {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-weight: 500;
}

.link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* Small Text */
.small {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

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

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

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

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

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

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

.mt-1 { margin-top: 12px; }
.mt-2 { margin-top: 20px; }
.mb-1 { margin-bottom: 12px; }
.mb-2 { margin-bottom: 20px; }

/* Scrollbar Styling - Apple Style */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* Focus Visible - Apple Blue Ring */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Diff View */
.diff-view {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 16px;
}

.diff-panel {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
}

.diff-panel h4 {
  margin: 0;
  padding: 12px 16px;
  background: var(--bg-card);
  font-size: 13px;
  font-weight: 700;
  border-bottom: 1px solid var(--border-color);
  letter-spacing: -0.01em;
}

.diff-panel .content {
  padding: 16px;
  white-space: pre-wrap;
  line-height: 1.7;
  max-height: 300px;
  overflow-y: auto;
  background: var(--bg-elevated);
  font-size: 14px;
}

@media (max-width: 600px) {
  .diff-view {
    grid-template-columns: 1fr;
  }
}

/* Cost Estimator */
.cost-estimate {
  display: flex;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  font-size: 12px;
  margin: 10px 0;
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
}

.cost-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cost-item label {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.cost-item .value {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 14px;
}

/* Select Styling - Apple Style */
select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

[data-theme="dark"] select {
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23999' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

/* Smooth Transitions for Theme */
body,
.btn,
.card,
.out,
summary,
select,
input,
textarea {
  transition: background-color var(--transition-smooth),
              color var(--transition-smooth),
              border-color var(--transition-smooth),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
}

/* Glassmorphism Enhancement */
.card,
.out,
summary,
.provider-row,
.cost-estimate,
.toast,
.diff-panel {
  backdrop-filter: var(--blur-glass) saturate(180%);
  -webkit-backdrop-filter: var(--blur-glass) saturate(180%);
}

/* Premium Glow Effect on Hover for Primary Actions */
.btn.primary {
  position: relative;
  overflow: hidden;
}

.btn.primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

.btn.primary:hover::before {
  left: 100%;
}

/* Responsive Design */
@media (max-width: 1024px) {
  /* Sidebar overlays on smaller screens instead of pushing content */
  .settings-sidebar {
    width: 400px;
  }

  .settings-sidebar.open ~ .main-content {
    margin-left: 0;
  }
}

@media (max-width: 768px) {
  /* Sidebar overlays on mobile instead of pushing content */
  .settings-sidebar {
    width: 360px;
  }

  .settings-sidebar.open ~ .main-content {
    margin-left: 0;
  }

  .sidebar-toggle {
    top: 10px;
    left: 10px;
    padding: 6px 12px;
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: 12px;
  }

  h1 {
    font-size: 18px;
  }

  .btn-group.full-width .btn {
    min-width: 100%;
  }

  .quick-actions .btn {
    min-width: 100%;
  }

  .provider-row {
    flex-direction: column;
    align-items: stretch;
  }

  .settings-sidebar {
    width: 320px;
  }

  .sidebar-toggle {
    padding: 5px 10px;
    font-size: 12px;
  }

  .sidebar-toggle .text {
    display: none;
  }
}

/* Loading State Pulse */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.btn:disabled {
  animation: pulse 2s ease-in-out infinite;
}

/* Smooth Appear Animation for All Cards */
.card,
details {
  animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Special Effects for Theme Toggle */
.theme-toggle {
  position: relative;
  overflow: hidden;
}

.theme-toggle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 122, 255, 0.3), transparent);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.theme-toggle:active::after {
  width: 200px;
  height: 200px;
}