@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Inter:wght@400;500;600&display=swap');


/* ===== CSS Variables ===== */
:root {
  /* Deep Premium Dark Mode (Linear/Vercel Inspired) */
  --bg-primary: #0A0A0A;
  --bg-secondary: #111111;
  --bg-sidebar: #111111;
  --bg-hover: rgba(255, 255, 255, 0.05);
  --bg-active: rgba(255, 255, 255, 0.09);
  --bg-input: #111111;
  
  /* Text and Lines */
  --text-primary: #F4F4F5;
  --text-secondary: #A1A1AA;
  --text-muted: #71717A;
  --border-color: rgba(255, 255, 255, 0.08);

  /* Message Bubbles */
  --bg-user-bubble: rgba(139, 92, 246, 0.15); /* Premium faint violet glass */
  --bg-ai-bubble: transparent;
  
  /* AI 'Intelligence' Accents */
  --accent: #8B5CF6; /* Premium Violet */
  --accent-hover: #7C3AED;
  --accent-gradient: linear-gradient(135deg, #6366F1, #D946EF); /* Indigo to Fuchsia */
  
  --danger: #EF4444;
  --danger-hover: #DC2626;

  /* Elevations and Glass */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.04);
  --glass-bg: rgba(10, 10, 10, 0.75);
  --glass-border: rgba(255, 255, 255, 0.06);
  --bg-elevated: #18181B;
  
  /* Sizing Constraints */
  --sidebar-width: 260px;
  --topbar-height: 48px;
  --input-max-height: 200px;
  --mini-chat-width: 380px;
  --mini-chat-height: 520px;
  --transition-speed: 0.25s;
  --font-size-small: 13px;
  --font-size-medium: 15px;
  --font-size-large: 17px;
  --color-transition: background-color 0.3s, color 0.3s, border-color 0.3s, box-shadow 0.3s;
}

/* ===== LIGHT THEME ===== */
body.light-theme {
  --bg-primary: #F8FAFC;
  --bg-secondary: #FFFFFF;
  --bg-sidebar: #F1F5F9;
  --bg-hover: rgba(0, 0, 0, 0.05);
  --bg-active: rgba(0, 0, 0, 0.08);
  --bg-input: #FFFFFF;
  
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --border-color: rgba(0, 0, 0, 0.08);

  --bg-user-bubble: #E2E8F0;
  --bg-ai-bubble: transparent;
  
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(0, 0, 0, 0.06);
  --bg-elevated: #FFFFFF;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.06), 0 0 0 1px rgba(0, 0, 0, 0.02);
}

/* ===== Reset ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg-primary);
  /* A very faint, highly sophisticated ambient glow behind the chat */
  background-image: radial-gradient(circle at 50% -20%, rgba(139, 92, 246, 0.08), transparent 60%);
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.6;
  transition: var(--color-transition);
}

/* Fix Native Browser Input Autofill & Select Options Contrast */
input:-webkit-autofill,
input:-webkit-autofill:hover, 
input:-webkit-autofill:focus, 
input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 30px var(--bg-hover) inset !important;
  -webkit-text-fill-color: var(--text-primary) !important;
  transition: background-color 5000s ease-in-out 0s;
}

select {
  background-color: var(--bg-input);
  color: var(--text-primary);
}

select option {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

h1, h2, h3, .user-name {
  font-family: 'Outfit', sans-serif;
}

/* Add transition for color and background */
.sidebar,
.main,
.chat-area,
.input-container,
.messages,
.welcome-screen,
.modal,
.modal-sm,
.sidebar-footer,
.sidebar-search,
.chat-item,
.chat-item.active,
.chat-item-avatar,
.user-profile,
.user-avatar,
.message-content,
.message.user .message-content,
.message.assistant .message-content,
.input-area,
.suggestion-chip,
.mini-chat,
.mini-chat-header,
.mini-chat-messages,
.mini-message-content,
.mini-message.user,
.mini-message.assistant,
.mini-typing,
.mini-message-avatar {
  transition: var(--color-transition);
}
/* Removed duplicate light-theme definition */

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  font-size: inherit;
}

textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  resize: none;
  border: none;
  outline: none;
  background: none;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: #565869;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #6e7088;
}

/* ===== App Layout ===== */
.app {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ===== Sidebar ===== */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  transition: margin-left var(--transition-speed) ease, opacity var(--transition-speed) ease;
  border-right: 1px solid var(--border-color);
  overflow: hidden;
}

.sidebar.hidden {
  margin-left: calc(-1 * var(--sidebar-width));
  opacity: 0;
  pointer-events: none;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  height: var(--topbar-height);
}

.sidebar-toggle {
  padding: 8px;
  border-radius: 8px;
  color: var(--text-secondary);
  transition: background var(--transition-speed), color var(--transition-speed);
}

.sidebar-toggle:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.new-chat-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  transition: background var(--transition-speed), color var(--transition-speed);
}

.new-chat-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.attach-btn {
  padding: 8px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-speed), color var(--transition-speed);
}

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

.attach-menu {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 100;
  min-width: 240px;
}

.attach-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.attach-menu-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-family: inherit;
  cursor: pointer;
  border-radius: 10px;
  text-align: left;
  transition: background 0.2s ease, transform 0.1s ease;
}

.attach-menu-item:hover {
  background: var(--bg-hover);
}

.attach-menu-item:active {
  transform: scale(0.98);
}

.attach-menu-item .icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  flex-shrink: 0;
}

.attach-menu-item .menu-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.attach-menu-item .menu-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.attach-menu-item .menu-desc {
  font-size: 12px;
  color: var(--text-muted);
}

/* Sidebar Search */
.sidebar-search {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 12px 8px;
  padding: 8px 12px;
  background: var(--bg-hover);
  border-radius: 8px;
  border: 1px solid transparent;
  transition: border-color var(--transition-speed);
}

.sidebar-search:focus-within {
  border-color: var(--text-muted);
}

.sidebar-search svg {
  color: var(--text-muted);
  flex-shrink: 0;
}

.sidebar-search input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
}

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

/* Chat List */

.chat-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px;
}

.chat-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition-speed), color var(--transition-speed);
  color: var(--text-secondary);
}
.chat-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.chat-item.active {
  background: var(--bg-active);
  color: var(--text-primary);
  font-weight: 600;
}
.chat-item.pinned {
  border-left: 2px solid var(--accent);
  padding-left: 10px;
}
.pin-badge {
  font-size: 11px;
  flex-shrink: 0;
  opacity: 0.7;
}

.chat-item-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-input);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: bold;
  color: var(--accent);
}
.sidebar-divider {
  height: 1px;
  background: var(--border-color);
  margin: 8px 0;
}
.sidebar-footer {
  padding: 12px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

/* Chat Date Groups */
.chat-group-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 12px 6px;
}

/* Sidebar Footer */
.sidebar-footer {
  flex-shrink: 0;
}

.sidebar-divider {
  height: 1px;
  background: var(--border-color);
  margin: 4px 12px;
}

.sidebar-footer-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: calc(100% - 16px);
  margin: 4px 8px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: background var(--transition-speed), color var(--transition-speed);
}

.sidebar-footer-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  margin: 2px 8px 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition-speed);
}

.user-profile:hover {
  background: var(--bg-hover);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #5a4fcf;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}

.user-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.user-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-email {
  font-size: 12px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== Modals ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 3000;
  animation: fadeInOverlay 0.2s ease;
}

.modal-overlay.open {
  display: flex;
}

@keyframes fadeInOverlay {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  width: 90%;
  max-width: 540px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
  animation: modalSlideIn 0.25s ease;
}

.modal-sm {
  max-width: 400px;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-16px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 600;
}

.modal-close {
  padding: 6px;
  border-radius: 6px;
  color: var(--text-muted);
  transition: background var(--transition-speed), color var(--transition-speed);
}

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

.modal-body {
  padding: 16px 24px 24px;
  overflow-y: auto;
}

/* Settings Sections */
.settings-section {
  margin-bottom: 24px;
}

.settings-section:last-child {
  margin-bottom: 0;
}

.settings-section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  gap: 16px;
}

.settings-item:last-child {
  border-bottom: none;
}

.settings-item-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.settings-item-label {
  font-size: 14px;
  color: var(--text-primary);
}

.settings-item-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.settings-select {
  background: var(--bg-hover);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
}

.settings-select:focus {
  border-color: var(--text-muted);
}

.settings-danger-btn {
  padding: 6px 16px;
  border-radius: 8px;
  background: var(--danger);
  color: white;
  font-size: 13px;
  font-weight: 500;
  transition: background var(--transition-speed);
  white-space: nowrap;
  flex-shrink: 0;
}

.settings-danger-btn:hover {
  background: var(--danger-hover);
}

/* Login Form */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.form-input {
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition-speed);
}

.form-input:focus {
  border-color: var(--accent);
}

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

.login-submit-btn {
  padding: 10px;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-size: 14px;
  font-weight: 600;
  transition: background var(--transition-speed);
  margin-top: 4px;
}

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

.login-guest-btn {
  padding: 10px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 14px;
  transition: background var(--transition-speed), color var(--transition-speed);
}

.login-guest-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Confirm Dialog */
.confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 4000;
}

.confirm-overlay.open {
  display: flex;
}

.confirm-box {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 24px;
  max-width: 380px;
  width: 90%;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
  text-align: center;
}

.confirm-box p {
  margin-bottom: 20px;
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.5;
}

.confirm-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.confirm-cancel {
  padding: 8px 20px;
  border-radius: 8px;
  background: var(--bg-hover);
  color: var(--text-primary);
  font-size: 14px;
  transition: background var(--transition-speed);
}

.confirm-cancel:hover {
  background: var(--border-color);
}

.confirm-delete {
  padding: 8px 20px;
  border-radius: 8px;
  background: var(--danger);
  color: white;
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition-speed);
}

.confirm-delete:hover {
  background: var(--danger-hover);
}

.chat-item {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition-speed);
  position: relative;
  margin-bottom: 2px;
  gap: 8px;
}

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

.chat-item.active {
  background: var(--bg-active);
}

.chat-item-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 14px;
}

.chat-item-menu {
  opacity: 0;
  padding: 4px;
  border-radius: 4px;
  color: var(--text-muted);
  transition: opacity var(--transition-speed), background var(--transition-speed);
  flex-shrink: 0;
}

.chat-item:hover .chat-item-menu {
  opacity: 1;
}

.chat-item-menu:hover {
  background: var(--border-color);
  color: var(--text-primary);
}

/* Rename input */
.chat-item-rename {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
}

/* ===== Main Content ===== */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  position: relative;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  height: var(--topbar-height);
  flex-shrink: 0;
  gap: 8px;
}

.sidebar-open-btn,
.topbar-new-chat {
  padding: 8px;
  border-radius: 8px;
  color: var(--text-secondary);
  transition: background var(--transition-speed), color var(--transition-speed);
}

.sidebar-open-btn:hover,
.topbar-new-chat:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.topbar-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-left: auto;
  margin-right: auto;
}

/* ===== Chat Area ===== */
.chat-area {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

/* Welcome Screen */
.welcome-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 20px;
  text-align: center;
}

.welcome-screen.hidden {
  display: none;
}

.welcome-icon {
  color: var(--text-primary);
  margin-bottom: 20px;
  opacity: 0.8;
}

.welcome-screen h1 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 32px;
  color: var(--text-primary);
}

.suggestions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 600px;
  width: 100%;
}

.suggestion-chip {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  text-align: left;
  font-size: 14px;
  color: var(--text-secondary);
  transition: all var(--transition-speed);
  line-height: 1.5;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.suggestion-chip:hover {
  background: var(--bg-hover);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
}

.chip-icon {
  font-size: 16px;
  flex-shrink: 0;
}

/* Messages */
.messages {
  display: none;
  flex-direction: column;
  padding: 20px 16px;
  max-width: 768px;
  width: 100%;
  margin: 0 auto;
  gap: 2px;
}

.messages.visible {
  display: flex;
}
.message-wrapper {
  margin-bottom: 8px;
}
.message-content {
  min-width: 0;
  max-width: 100%;
  flex: 1;
}
.message.user .message-content {
  background: var(--bg-user-bubble); /* Premium tint */
  border-radius: 20px 20px 4px 20px;
  padding: 12px 18px;
  color: var(--text-primary);
  max-width: 100%;
  overflow-wrap: break-word;
}
.message.assistant .message-content {
  background: var(--bg-ai-bubble);
  padding: 12px 4px;
}
.message.hint .message-content {
  background: #fffbe6;
  border: 1px solid #ffe066;
  color: #8a6d3b;
  border-radius: 18px 18px 18px 4px;
  padding: 12px 18px;
  box-shadow: 0 2px 8px rgba(255,224,102,0.12);
  font-style: italic;
}
.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  margin-top: 2px;
}
.message.user .message-avatar {
  background: #5a4fcf;
  color: white;
}
.message.assistant .message-avatar {
  background: var(--accent);
  color: white;
}
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  margin-bottom: 8px;
}
.typing-dots span {
  width: 8px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out;
}
.input-container {
  display: flex;
  align-items: flex-end;
  gap: 0;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 12px 16px 12px 16px;
  width: 100%;
  max-width: 768px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.message-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
}

.message-wrapper.user-wrapper {
  align-items: flex-end;
}

.message-wrapper.assistant-wrapper {
  align-items: flex-start;
}

.message {
  display: flex;
  gap: 8px;
  padding: 6px 0;
  animation: fadeIn 0.3s ease;
  width: 100%;
}

.message.user {
  flex-direction: row-reverse;
  align-self: flex-end;
  max-width: 80%;
}

.message.assistant {
  max-width: 100%;
}

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

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 600;
}

.message.user .message-avatar {
  background: #5a4fcf;
  color: white;
}

.message.assistant .message-avatar {
  background: var(--accent);
  color: white;
}

.message-content {
  flex: initial;
  min-width: 0;
  line-height: 1.5;
  color: var(--text-primary);
  word-wrap: break-word;
}

.message-content p {
  margin-bottom: 6px;
}

.message-content p:last-child {
  margin-bottom: 0;
}

.message-content code {
  background: var(--bg-hover);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'Consolas', 'Monaco', monospace;
}

.message-content pre {
  background: var(--bg-secondary);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 8px 0;
}

.message-content pre code {
  background: none;
  padding: 0;
}

/* Typing Indicator */
.typing-indicator {
  display: flex;
  gap: 16px;
  padding: 16px 24px;
  animation: fadeIn 0.3s ease;
}

.typing-dots {
  display: flex;
  align-items: center;
  gap: 4px;
  padding-top: 10px;
}

.typing-dots span {
  width: 8px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out;
}

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

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

@keyframes bounce {
  0%, 80%, 100% {
    transform: scale(0.6);
    opacity: 0.4;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ===== Input Area ===== */
.input-area {
  padding: 0 24px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.input-container {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 12px 16px;
  width: 100%;
  max-width: 768px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed), transform var(--transition-speed);
}

.input-container:focus-within {
  border-color: rgba(59, 130, 246, 0.5);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2), var(--shadow-lg);
  transform: translateY(-1px);
}

.attach-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: color var(--transition-speed), background var(--transition-speed);
  margin-right: 4px;
}

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

.file-input-hidden {
  display: none;
}

.attached-files {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 24px;
  max-width: 768px;
  width: 100%;
  margin-bottom: 6px;
}

.attached-file {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--text-secondary);
  animation: fadeIn 0.2s ease;
}

.attached-file-name {
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.attached-file-remove {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-speed), background var(--transition-speed);
}

.attached-file-remove:hover {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
}

.input-container textarea {
  flex: 1;
  max-height: var(--input-max-height);
  line-height: 1.5;
  padding: 2px 0;
  color: var(--text-primary);
}

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

.send-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--text-primary);
  color: var(--bg-primary);
  flex-shrink: 0;
  transition: opacity var(--transition-speed), transform var(--transition-speed);
}

.send-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.send-btn:not(:disabled):hover {
  opacity: 0.8;
}

.send-btn:not(:disabled):active {
  transform: scale(0.92);
}

.disclaimer {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
  text-align: center;
}

.mini-chat-toggle {
  position: fixed;
  bottom: 100px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent-gradient);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s;
  z-index: 1000;
}

.mini-chat-toggle:hover {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 12px 28px rgba(59, 130, 246, 0.6);
}

.mini-chat-toggle.hidden {
  display: none;
}

/* Pulse animation */
.mini-chat-toggle::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid var(--accent);
  box-sizing: border-box;
  animation: pulse 2s ease-out infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  100% {
    transform: scale(1.5);
    opacity: 0;
  }
}

/* ===== Mini Chat Window ===== */
.mini-chat {
  position: fixed;
  bottom: 100px;
  right: 24px;
  width: var(--mini-chat-width);
  height: var(--mini-chat-height);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  display: none;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1001;
  overflow: hidden;
  animation: slideUp 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.mini-chat.open {
  display: flex;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.mini-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--accent-gradient);
  border-bottom: none;
}

.mini-chat-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
}

.mini-chat-header-left svg {
  color: #ffffff;
}

.mini-chat-close {
  padding: 4px;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.7);
  transition: background var(--transition-speed), color var(--transition-speed);
}

.mini-chat-close:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

/* Mini Chat Messages */
.mini-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mini-welcome {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  text-align: center;
}

.mini-welcome p {
  color: var(--text-muted);
  font-size: 13px;
  padding: 20px;
  line-height: 1.5;
}

.mini-message {
  display: flex;
  gap: 8px;
  animation: fadeIn 0.3s ease;
}

.mini-message-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 600;
}

.mini-message.user .mini-message-avatar {
  background: #5a4fcf;
  color: white;
}

.mini-message.assistant .mini-message-avatar {
  background: var(--accent);
  color: white;
}

.mini-message-content {
  flex: 1;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--text-primary);
  padding: 8px 12px;
  background: #1C1C1C;
  border-radius: 12px 12px 2px 12px;
  min-width: 0;
  box-shadow: var(--shadow-sm);
}

.mini-message.assistant .mini-message-content {
  background: transparent;
  border-radius: 12px;
  box-shadow: none;
  padding: 8px 4px;
  color: #EDEDED;
}

/* Mini Typing */
.mini-typing {
  display: flex;
  gap: 8px;
  animation: fadeIn 0.3s ease;
}

.mini-typing-dots {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border-radius: 10px;
}

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

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

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

/* Mini Chat Input */
.mini-chat-input-area {
  display: flex;
  align-items: flex-end;
  gap: 0;
  padding: 10px 12px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.mini-chat-input-area textarea {
  flex: 1;
  max-height: 80px;
  line-height: 1.4;
  padding: 6px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  font-size: 13px;
  color: var(--text-primary);
  transition: border-color var(--transition-speed);
}

.mini-chat-input-area textarea:focus {
  border-color: var(--text-muted);
  outline: none;
}

.mini-chat-input-area textarea::placeholder {
  color: var(--text-muted);
}

.mini-send-btn {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--text-primary);
  color: var(--bg-primary);
  flex-shrink: 0;
  margin-left: 6px;
  transition: opacity var(--transition-speed);
}

.mini-send-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.mini-send-btn:not(:disabled):hover {
  opacity: 0.8;
}

/* ===== Context Menu ===== */
.context-menu {
  position: fixed;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 4px;
  z-index: 2000;
  display: none;
  box-shadow: 0 8px 24px var(--shadow);
  min-width: 160px;
}

.context-menu.visible {
  display: block;
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: background var(--transition-speed), color var(--transition-speed);
}

.context-menu-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.context-menu-item.delete:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

/* ===== Model Selector ===== */
.model-selector {
  position: relative;
  margin-left: auto;
  margin-right: auto;
}

.model-selector-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  transition: background var(--transition-speed);
}

.model-selector-btn:hover {
  background: var(--bg-hover);
}

.model-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 4px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 4px;
  min-width: 260px;
  box-shadow: 0 8px 24px var(--shadow);
  z-index: 100;
  animation: fadeIn 0.15s ease;
}

.model-dropdown.open {
  display: block;
}

.model-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  text-align: left;
  transition: background var(--transition-speed);
}

.model-option:hover {
  background: var(--bg-hover);
}

.model-option.active {
  background: var(--bg-active);
}

.model-option-info {
  display: flex;
  flex-direction: column;
}

.model-option-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.model-option-desc {
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== Message Actions ===== */
.message-actions {
  display: flex;
  gap: 2px;
  padding: 2px 24px;
  opacity: 0;
  transition: opacity var(--transition-speed);
}

.message-wrapper.assistant-wrapper .message-actions {
  margin-left: 44px;
}

.message-wrapper.user-wrapper .message-actions {
  margin-right: 44px;
  flex-direction: row-reverse;
}

.message-wrapper:hover .message-actions {
  opacity: 1;
}

.msg-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  color: var(--text-muted);
  transition: background var(--transition-speed), color var(--transition-speed);
}

.msg-action-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.msg-action-btn.copied {
  color: var(--accent);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 13px;
  z-index: 5000;
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== Toggle Switch ===== */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

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

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  transition: background var(--transition-speed), border-color var(--transition-speed);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  left: 2px;
  bottom: 2px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: transform var(--transition-speed), background var(--transition-speed);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--accent);
  border-color: var(--accent);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(20px);
  background: white;
}

/* ===== Settings Textarea ===== */
.settings-textarea {
  width: 100%;
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  line-height: 1.5;
  resize: vertical;
  min-height: 60px;
  max-height: 150px;
  outline: none;
  transition: border-color var(--transition-speed);
}

.settings-textarea:focus {
  border-color: var(--accent);
}

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

/* Settings Action Button */
.settings-action-btn {
  padding: 6px 16px;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-size: 13px;
  font-weight: 500;
  transition: background var(--transition-speed);
  white-space: nowrap;
  flex-shrink: 0;
}

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

/* ===== Font Size Classes ===== */
body.font-small {
  font-size: var(--font-size-small);
}

body.font-small .message-content {
  font-size: var(--font-size-small);
}

body.font-small .mini-message-content {
  font-size: 12px;
}

body.font-large {
  font-size: var(--font-size-large);
}

body.font-large .message-content {
  font-size: var(--font-size-large);
}

body.font-large .mini-message-content {
  font-size: 15px;
}

/* ===== Markdown Styling ===== */
.message-content h1, .message-content h2, .message-content h3, .message-content h4,
.mini-message-content h1, .mini-message-content h2, .mini-message-content h3, .mini-message-content h4 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  margin-top: 24px;
  margin-bottom: 12px;
  line-height: 1.3;
}
.message-content h1, .mini-message-content h1 { font-size: 24px; }
.message-content h2, .mini-message-content h2 { font-size: 20px; }
.message-content h3, .mini-message-content h3 { font-size: 18px; }

.message-content p, .mini-message-content p {
  margin-bottom: 14px;
  line-height: 1.6;
}
.message-content p:last-child, .mini-message-content p:last-child {
  margin-bottom: 0;
}
.message-content ul, .message-content ol,
.mini-message-content ul, .mini-message-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}
.message-content li, .mini-message-content li {
  margin-bottom: 6px;
  line-height: 1.6;
}
.message-content pre, .mini-message-content pre {
  background: #0f111a;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 16px 0;
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.message-content pre code, .mini-message-content pre code {
  color: #E2E8F0;
  font-family: 'Inter', monospace;
  font-size: 13px !important;
  background: none;
  padding: 0;
}
.message-content p > code, .message-content li > code,
.mini-message-content p > code, .mini-message-content li > code {
  background: var(--bg-hover);
  color: #c084fc;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.9em;
}
.message-content blockquote, .mini-message-content blockquote {
  border-left: 4px solid var(--accent);
  padding-left: 16px;
  color: var(--text-secondary);
  margin: 16px 0;
  font-style: italic;
}

/* Markdown Tables */
.message-content table, .mini-message-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.05);
}
.message-content th, .message-content td,
.mini-message-content th, .mini-message-content td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.message-content th, .mini-message-content th {
  background: rgba(255, 255, 255, 0.04);
  font-weight: 600;
  color: var(--text-primary);
}
.message-content tr:last-child td, .mini-message-content tr:last-child td {
  border-bottom: none;
}

/* Code Block with Header */
.code-container {
  background: #0f111a;
  border-radius: 8px;
  overflow: hidden;
  margin: 16px 0;
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.code-lang {
  color: var(--text-secondary);
  font-size: 12px;
  text-transform: uppercase;
  font-family: 'Inter', sans-serif;
  letter-spacing: 0.5px;
}
.code-copy-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.2s;
}
.code-copy-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}
.message-content pre {
  margin: 0;
  border: none;
  border-radius: 0;
}

/* Follow-up Suggestion Chips */
.suggestions-chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}
.suggestion-chip-btn {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  line-height: 1.4;
  max-width: 90%;
}
.suggestion-chip-btn:hover {
  background: var(--bg-active);
  color: var(--text-primary);
  border-color: var(--text-muted);
  transform: translateY(-1px);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100%;
    z-index: 500;
    box-shadow: 4px 0 16px var(--shadow);
    transform: translateX(0);
    transition: transform var(--transition-speed) ease;
  }

  .sidebar.hidden {
    margin-left: 0;
    transform: translateX(-100%);
  }

  .topbar {
    display: flex;
  }

  .suggestions {
    grid-template-columns: 1fr;
  }

  .welcome-screen h1 {
    font-size: 22px;
  }

  .mini-chat {
    width: calc(100vw - 20px);
    height: 60vh;
    right: 10px;
    bottom: 10px;
  }
  
  .input-container {
    border-radius: 16px;
    padding: 8px 12px;
  }
  
  .message.user {
    max-width: 90%;
  }

  .input-area {
    padding: 0 8px 12px;
  }
  
  .messages {
    padding: 8px;
  }
  
  .topbar {
    padding: 8px;
  }
  
  .topbar-title {
    font-size: 15px;
  }
}

/* ===== Selection Auto-Hint Tooltip ===== */
.selection-hint-btn {
  position: absolute;
  background: var(--accent-gradient);
  color: white;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
  z-index: 5000;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px) translateX(-50%);
  transition: opacity 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.selection-hint-btn.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) translateX(-50%);
}

.selection-hint-btn:hover {
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
  filter: brightness(1.1);
}

/* AI Generated Markdown Image Styling */
.message-content img {
  max-width: 100%;
  max-height: 400px;
  width: auto;
  height: auto;
  border-radius: 12px;
  margin: 12px 0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-color);
  display: block;
}

@media (max-width: 480px) {
  :root {
    --sidebar-width: 240px;
  }

  .input-container {
    padding: 8px 10px 8px 14px;
  }
}

/* ===== Upgrade Button ===== */
.upgrade-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: calc(100% - 24px);
  margin: 0 12px 8px;
  padding: 10px 14px;
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
  border-radius: 10px;
  color: white;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
  box-shadow: 0 2px 12px rgba(124, 58, 237, 0.35);
  border: none;
}
.upgrade-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}
.upgrade-btn.pro-active {
  background: linear-gradient(135deg, #059669, #0d9488);
  box-shadow: 0 2px 12px rgba(5, 150, 105, 0.35);
}

/* ===== Premium Modal ===== */
.premium-modal {
  max-width: 440px;
  width: 90%;
  position: relative;
  padding: 32px;
  text-align: center;
}
.premium-modal-header {
  margin-bottom: 24px;
}
.premium-badge-icon {
  font-size: 40px;
  margin-bottom: 12px;
  display: block;
  filter: drop-shadow(0 0 12px rgba(139, 92, 246, 0.6));
}
.premium-modal-header h2 {
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(135deg, #a78bfa, #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}
.premium-tagline {
  color: var(--text-muted);
  font-size: 14px;
}
.premium-features {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}
.premium-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.feature-check {
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}
.premium-feature-item strong {
  display: block;
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 2px;
}
.premium-feature-item span {
  font-size: 12px;
  color: var(--text-muted);
}
.premium-pricing {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
}
.premium-price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 6px;
}
.price-amount {
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(135deg, #a78bfa, #60a5fa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.price-period {
  font-size: 16px;
  color: var(--text-muted);
}
.price-note {
  font-size: 12px;
  color: var(--text-muted);
}
.premium-pay-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
  border-radius: 12px;
  color: white;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s, transform 0.2s;
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
  margin-bottom: 12px;
}
.premium-pay-btn:hover {
  opacity: 0.92;
  transform: translateY(-2px);
}
.premium-pay-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}
.premium-disclaimer {
  font-size: 12px;
  color: var(--text-muted);
  min-height: 18px;
}