/* ==========================================================================
   SisuryaRouter - Modern Dark Design System & Layout
   Ultra-Clean | Zero Emojis | 100% Client-Side | Fully Responsive
   ========================================================================== */

:root {
  /* Core Colors */
  --bg-primary: #050505;
  --bg-secondary: #0c0c0c;
  --bg-tertiary: #141414;
  --bg-card: #111111;
  --bg-card-hover: #181818;
  --bg-input: #0e0e0e;
  
  --border-subtle: #1e1e1e;
  --border-strong: #2a2a2a;
  --border-focus: #444444;
  
  --text-primary: #ffffff;
  --text-secondary: #a3a3a3;
  --text-muted: #666666;
  --text-subtle: #444444;

  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --accent-red: #ef4444;

  /* Typography */
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Spacing Scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-28: 28px;
  --radius-full: 9999px;

  /* Transitions */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
}

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

html, body {
  width: 100%;
  height: 100%;
  height: 100dvh;
  min-height: -webkit-fill-available;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 15px;
  line-height: 1.5;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Shell Layout */
#app-shell {
  display: flex;
  width: 100%;
  max-width: 100%;
  height: 100%;
  height: 100dvh;
  min-height: -webkit-fill-available;
  background-color: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

/* ==========================================================================
   Sidebar Navigation (Slide Drawer)
   ========================================================================== */
.sidebar {
  width: 260px;
  min-width: 260px;
  max-width: 260px;
  height: 100%;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  z-index: 60;
  margin-left: 0;
  transition: margin-left var(--duration-normal) var(--ease), 
              transform var(--duration-normal) var(--ease),
              opacity var(--duration-normal) var(--ease),
              visibility var(--duration-normal) var(--ease);
}

.sidebar.collapsed {
  margin-left: -260px !important;
  border-right: none !important;
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

.sidebar-header {
  height: 56px;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

.brand-logo-img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  object-fit: cover;
  display: block;
  border: 1px solid var(--border-subtle);
}

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: #181818;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

.sidebar-top-actions {
  padding: var(--space-3) var(--space-3) var(--space-2) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex-shrink: 0;
}

.new-chat-btn {
  width: 100%;
  padding: 9px 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
}

.new-chat-btn:hover {
  background: var(--bg-card-hover);
  border-color: #444444;
  transform: translateY(-1px);
}

.new-chat-btn .btn-icon {
  display: flex;
}

.sessions-search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.sessions-search-box .search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-muted);
  pointer-events: none;
  display: flex;
}

.sessions-search-box input {
  width: 100%;
  padding: 7px 10px 7px 32px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 12.5px;
  outline: none;
  transition: border-color var(--duration-fast) var(--ease);
}

.sessions-search-box input:focus {
  border-color: var(--border-focus);
}

.sessions-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sessions-list::-webkit-scrollbar {
  width: 4px;
}

.sessions-list::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 4px;
}

.session-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 10px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  user-select: none;
}

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

.session-item.active {
  background: #181818;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  font-weight: 500;
}

.session-title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-right: 6px;
}

.session-actions {
  display: none;
  align-items: center;
  gap: 2px;
}

.session-item:hover .session-actions,
.session-item.active .session-actions {
  display: flex;
}

.session-action-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 3px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.session-action-btn:hover {
  color: var(--text-primary);
  background: var(--border-subtle);
}

.sidebar-section-title {
  padding: 8px 14px 4px 14px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.sidebar-footer {
  padding: 10px 12px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  background: #090909;
}

/* Sidebar Profile / Settings Card at the Bottom (Ultra Clean) */
.sidebar-profile-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: #111111;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease);
  cursor: pointer;
  user-select: none;
}

.sidebar-profile-card:hover {
  background: #181818;
  border-color: var(--border-strong);
}

.profile-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #242424;
  border: 1px solid #383838;
  color: #ffffff;
  font-weight: 700;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  letter-spacing: -0.5px;
}

.profile-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.profile-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.profile-status {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.profile-settings-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 5px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease);
}

.profile-settings-btn:hover {
  color: #ffffff;
  background: #242424;
}

.sidebar-backdrop {
  display: none;
}

/* ==========================================================================
   Main Chat Workspace
   ========================================================================== */
#main-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 50% 12%, rgba(20, 20, 20, 0.6) 0%, rgba(5, 5, 5, 1) 80%);
}

/* Top Navigation Bar */
.chat-header {
  height: 56px;
  min-height: calc(56px + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  padding-left: max(var(--space-4), env(safe-area-inset-left, 0px));
  padding-right: max(var(--space-4), env(safe-area-inset-right, 0px));
  padding-bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  background-color: rgba(5, 5, 5, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 30;
  flex-shrink: 0;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.icon-button {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  flex-shrink: 0;
}

.icon-button:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

/* Rounded Header Pill */
.model-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: #111111;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  user-select: none;
}

.model-pill:hover {
  background: #181818;
  border-color: var(--border-focus);
}

.pill-sparkle {
  display: flex;
  color: var(--text-primary);
}

.pill-title {
  white-space: nowrap;
}

.pill-model-name {
  max-width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-muted);
  font-weight: 400;
  font-size: 12px;
}

/* Header Live Usage Pill */
.usage-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: #111111;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  user-select: none;
}

.usage-pill:hover {
  background: #181818;
  border-color: #555555;
  color: #ffffff;
}

.usage-pill-icon {
  display: flex;
  color: var(--accent-green);
}

.usage-pill-text {
  font-family: var(--font-mono);
  font-size: 11.5px;
  white-space: nowrap;
}

.usage-mini-bar-track {
  width: 32px;
  height: 5px;
  background: #222222;
  border-radius: 3px;
  overflow: hidden;
}

.usage-mini-bar-fill {
  height: 100%;
  background: var(--accent-green);
  border-radius: 3px;
  transition: width 300ms var(--ease), background 300ms var(--ease);
}

/* ==========================================================================
   Chat Body: Hero View & Message Stream
   ========================================================================== */
#chat-scroll-container {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
  position: relative;
  padding: 0 var(--space-4) 8px var(--space-4);
}

#chat-scroll-container::-webkit-scrollbar {
  width: 6px;
}

#chat-scroll-container::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 6px;
}

/* Hero State View */
#chat-hero {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) var(--space-4);
  text-align: center;
  user-select: none;
  min-height: 0;
}

#chat-hero.hidden {
  display: none;
}

/* 190px Glowing Orb */
.glow-orb {
  position: relative;
  width: 190px;
  height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
}

.glow-circle-1 {
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0) 70%);
  animation: orbPulse 4s ease-in-out infinite alternate;
}

.glow-circle-2 {
  position: absolute;
  width: 125px;
  height: 125px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(6px);
  animation: orbRotate 14s linear infinite;
}

.glow-circle-3 {
  position: absolute;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: #111111;
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  box-shadow: 0 0 35px rgba(255, 255, 255, 0.1), inset 0 0 12px rgba(255, 255, 255, 0.05);
}

@keyframes orbPulse {
  0% { transform: scale(0.9); opacity: 0.6; }
  100% { transform: scale(1.1); opacity: 1; }
}

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

.chat-headline {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  background: linear-gradient(180deg, #ffffff 40%, #888888 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.chat-subheadline {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 480px;
  line-height: 1.5;
}

/* Active Message Stream */
#messages-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
}

#messages-container.hidden {
  display: none;
}

.message-row {
  display: flex;
  gap: var(--space-3);
  animation: fadeIn 200ms var(--ease);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.message-row.user-message {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: #161616;
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  flex-shrink: 0;
  margin-top: 2px;
  overflow: hidden;
  transition: all var(--duration-fast) var(--ease);
}

.message-row.generating .message-avatar {
  border-color: rgba(255, 255, 255, 0.4);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.2);
  animation: botPulseGlow 1.4s ease-in-out infinite alternate;
}

@keyframes botPulseGlow {
  0% {
    transform: scale(0.96);
    box-shadow: 0 0 4px rgba(255, 255, 255, 0.1);
    border-color: var(--border-subtle);
  }
  100% {
    transform: scale(1.05);
    box-shadow: 0 0 16px rgba(255, 255, 255, 0.4);
    border-color: rgba(255, 255, 255, 0.7);
  }
}

/* Typing Indicator Bubble */
.typing-bubble {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  background: #141414;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  min-height: 36px;
  animation: fadeIn 150ms var(--ease);
}

.typing-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
}

.typing-dot {
  width: 6px;
  height: 6px;
  background-color: #888888;
  border-radius: 50%;
  display: inline-block;
  animation: typingWave 1.3s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
  animation-delay: 0s;
}

.typing-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typingWave {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.35;
    background-color: #666666;
  }
  30% {
    transform: translateY(-5px);
    opacity: 1;
    background-color: #ffffff;
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
  }
}

.profile-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.message-user-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.message-bubble {
  max-width: 85%;
  font-size: 15px;
  position: relative;
}

.user-message .message-bubble {
  background-color: #181818;
  border: 1px solid var(--border-strong);
  border-radius: 18px 18px 4px 18px;
  padding: 10px 16px;
  color: var(--text-primary);
}

.assistant-message .message-bubble {
  background-color: transparent;
  color: var(--text-primary);
  width: 100%;
}

/* Markdown Formatted Elements */
.message-content {
  line-height: 1.6;
}

.message-content p {
  margin-bottom: 12px;
}

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

.md-h1 { font-size: 22px; font-weight: 700; margin: 18px 0 10px 0; color: #ffffff; border-bottom: 1px solid var(--border-subtle); padding-bottom: 6px; }
.md-h2 { font-size: 19px; font-weight: 600; margin: 16px 0 8px 0; color: #ffffff; }
.md-h3 { font-size: 16.5px; font-weight: 600; margin: 14px 0 6px 0; color: #f0f0f0; }
.md-h4, .md-h5, .md-h6 { font-size: 14.5px; font-weight: 600; margin: 12px 0 6px 0; color: #e0e0e0; }

.message-content ul, .message-content ol {
  margin-left: 24px;
  margin-bottom: 12px;
}

.message-content li {
  margin-bottom: 4px;
}

.md-task-li {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: -20px;
}

.task-checkbox {
  width: 15px;
  height: 15px;
  accent-color: #ffffff;
}

.inline-code {
  background: #181818;
  border: 1px solid #292929;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: #e5e5e5;
}

.inline-math {
  background: #141414;
  border: 1px solid #2d2d2d;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  color: #93c5fd;
  font-size: 0.92em;
}

.math-block-display {
  margin: 12px 0;
  padding: 12px 16px;
  background: #090909;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  color: #bfdbfe;
  font-size: 14px;
  text-align: center;
}

/* Blockquotes */
.md-quote {
  border-left: 3px solid #3b82f6;
  background: rgba(59, 130, 246, 0.05);
  padding: 8px 14px;
  margin: 12px 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* Horizontal Rule */
.md-hr {
  border: none;
  border-top: 1px solid var(--border-strong);
  margin: 16px 0;
}

/* Links & URLs */
.md-link {
  color: #60a5fa;
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-all;
  transition: color var(--duration-fast) var(--ease);
}

.md-link:hover {
  color: #93c5fd;
}

/* Responsive Image Embed */
.md-image-wrapper {
  margin: 12px 0;
}

.md-image {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
}

/* Tables */
.table-container {
  overflow-x: auto;
  margin: 14px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
}

.table-container table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

.table-container th {
  background: #161616;
  padding: 8px 12px;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-strong);
}

.table-container td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.table-container tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.015);
}

/* Syntax Highlighting */
.syn-kw { color: #f472b6; font-weight: 500; }
.syn-bool { color: #38bdf8; }
.syn-str { color: #4ade80; }
.syn-comment { color: #71717a; font-style: italic; }

/* Code Block with Header */
.code-block-wrapper {
  margin: 14px 0;
  background: #090909;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: #141414;
  border-bottom: 1px solid var(--border-subtle);
}

.code-lang {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-weight: 600;
}

.copy-code-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.copy-code-btn:hover {
  background: var(--border-subtle);
  color: var(--text-primary);
}

.code-block-wrapper pre {
  padding: 12px 14px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.5;
  color: #d1d5db;
}

/* Reasoning Thought Block (<think>) */
.think-container {
  margin-bottom: 14px;
}

.think-details {
  border: 1px solid var(--border-subtle);
  background: #0a0a0a;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.think-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  font-size: 13px;
  color: var(--text-secondary);
}

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

.think-badge {
  display: flex;
  align-items: center;
  gap: 6px;
}

.think-badge.pulse .think-icon {
  animation: brainGlow 1.5s infinite alternate;
  color: var(--accent-blue);
}

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

.think-chevron {
  display: flex;
  transition: transform var(--duration-fast) var(--ease);
}

.think-details[open] .think-chevron {
  transform: rotate(180deg);
}

.think-body {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  line-height: 1.5;
  background: #070707;
  font-family: var(--font-mono);
  white-space: pre-wrap;
}

/* Assistant Message Action Bar */
.message-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: 6px;
}

.msg-action-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.msg-action-btn:hover {
  color: var(--text-primary);
  background: #181818;
}

/* Streaming Cursor */
.streaming-cursor {
  display: inline-block;
  width: 7px;
  height: 14px;
  background-color: var(--text-primary);
  margin-left: 3px;
  vertical-align: middle;
  animation: blink 800ms infinite;
}

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

/* ==========================================================================
   Floating Composer
   ========================================================================== */
#chat-composer-wrapper {
  padding: 0 var(--space-4) calc(14px + env(safe-area-inset-bottom, 0px)) var(--space-4);
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  position: relative;
  z-index: 20;
  flex-shrink: 0;
}

/* Horizontal Subject Chips */
#subject-chips {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
  padding: 0 4px;
  transition: opacity var(--duration-fast) var(--ease);
}

#subject-chips.hidden {
  display: none !important;
}

.subject-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: #111111;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  user-select: none;
}

.subject-chip:hover {
  background: #1a1a1a;
  border-color: #444444;
  color: var(--text-primary);
  transform: translateY(-1px);
}

.chip-icon {
  display: flex;
  align-items: center;
}

/* Ultra-Clean Rounded-28 Input Card */
#input-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-28);
  padding: 8px 12px 8px 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
  transition: border-color var(--duration-fast) var(--ease), box-shadow var(--duration-fast) var(--ease);
}

#input-box:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.input-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.input-sparkle {
  color: var(--text-muted);
  display: flex;
  flex-shrink: 0;
}

#message-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 15px;
  line-height: 1.5;
  resize: none;
  max-height: 160px;
  min-height: 24px;
  outline: none;
  padding: 4px 0;
}

#message-input::placeholder {
  color: #555555;
}

/* Expand Long Prompt Editor Button */
.expand-editor-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: #181818;
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  flex-shrink: 0;
  animation: fadeIn 150ms var(--ease);
}

.expand-editor-btn:hover {
  background: #242424;
  color: #ffffff;
  border-color: #555555;
  transform: scale(1.08);
}

.expand-editor-btn.hidden {
  display: none !important;
}

/* Model Switcher in Composer */
.model-switcher-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.model-switcher-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: #181818;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  user-select: none;
  max-width: 160px;
}

.model-switcher-btn:hover {
  background: #222222;
  border-color: #555555;
}

.model-switcher-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.model-switcher-chevron {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  transition: transform var(--duration-fast) var(--ease);
}

.model-switcher-wrapper.open .model-switcher-chevron {
  transform: rotate(180deg);
}

/* Dropup Popover Menu */
.model-switcher-popover {
  position: absolute;
  bottom: calc(100% + 10px);
  right: 0;
  width: 260px;
  background: #141414;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.85);
  display: none;
  flex-direction: column;
  z-index: 100;
  overflow: hidden;
  animation: popoverFadeIn 150ms var(--ease);
}

@keyframes popoverFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.model-switcher-popover.active {
  display: flex;
}

.popover-header {
  padding: 10px 14px 6px 14px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.popover-models-list {
  display: flex;
  flex-direction: column;
  max-height: 220px;
  overflow-y: auto;
  padding: 4px;
  gap: 2px;
}

.popover-models-list::-webkit-scrollbar {
  width: 4px;
}

.popover-models-list::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 4px;
}

.popover-model-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 13px;
  transition: all var(--duration-fast) var(--ease);
  user-select: none;
}

.popover-model-item:hover {
  background: #222222;
  color: #ffffff;
}

.popover-model-item.selected {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  font-weight: 600;
}

.item-left {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
}

.item-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-check {
  color: #ffffff;
  display: flex;
  flex-shrink: 0;
}

.popover-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 6px 8px;
  background: #0d0d0d;
}

.popover-manage-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 10px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
}

.popover-manage-btn:hover {
  color: #ffffff;
  background: #1c1c1c;
}

/* Primary Send Button */
.send-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: #ffffff;
  border: none;
  color: #000000;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(255, 255, 255, 0.15);
}

.send-btn:hover {
  background: #e5e5e5;
  transform: scale(1.04);
}

.send-btn.stop-mode {
  background: var(--accent-red);
  color: #ffffff;
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.4);
}

@keyframes micPulse {
  0% { transform: scale(1); }
  100% { transform: scale(1.1); }
}

/* ==========================================================================
   Modals (Settings) - Clean Tabbed Interface (Zero Ugly Scrollbars)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  width: 100%;
  max-width: 620px;
  max-height: 90vh;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.95);
  transform: scale(0.96);
  transition: transform var(--duration-normal) var(--ease);
  overflow: hidden;
}

.modal-overlay.open .modal-card {
  transform: scale(1);
}

.modal-header {
  height: 56px;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  background: #090909;
  flex-shrink: 0;
}

.modal-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.settings-header-icon {
  display: flex;
  color: var(--text-primary);
}

.modal-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

/* Settings Nav Tabs Bar - Completely Hidden Scrollbar */
.settings-nav-tabs {
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
  background: #090909;
  gap: 6px;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  flex-shrink: 0;
}

.settings-nav-tabs::-webkit-scrollbar {
  display: none;
}

.settings-tab-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease);
}

.settings-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.settings-tab-btn.active {
  color: #ffffff;
  border-bottom-color: #ffffff;
  font-weight: 600;
}

.settings-tab-btn .tab-icon {
  display: flex;
}

/* Tab Panes */
.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  flex: 1;
}

.modal-body::-webkit-scrollbar {
  width: 4px;
}

.modal-body::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 4px;
}

.settings-tab-pane {
  display: none;
  flex-direction: column;
  gap: var(--space-4);
  animation: fadeIn 150ms var(--ease);
}

.settings-tab-pane.active {
  display: flex;
}

/* Preset Section Header & Action Bar */
.preset-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 8px;
}

.preset-top-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-micro {
  padding: 5px 12px;
  background: #181818;
  border: 1px solid #2a2a2a;
  border-radius: var(--radius-full);
  color: #cccccc;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all var(--duration-fast) var(--ease);
}

.btn-micro:hover {
  background: #242424;
  color: #ffffff;
  border-color: #444444;
  transform: translateY(-1px);
}

/* Preset Cards Grid */
.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 6px;
  max-height: 140px;
  overflow-y: auto;
  padding: 2px;
}

.preset-grid::-webkit-scrollbar {
  width: 4px;
}

.preset-grid::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 4px;
}

.preset-pill {
  padding: 8px 14px;
  background: #141414;
  border: 1px solid #242424;
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  text-align: center;
  transition: all var(--duration-fast) var(--ease);
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.preset-pill:hover {
  background: #1c1c1c;
  border-color: #383838;
  color: #ffffff;
}

.preset-pill.active {
  background: #ffffff;
  border-color: #ffffff;
  color: #000000;
  font-weight: 600;
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.12);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.form-hint {
  font-size: 11px;
  color: var(--text-muted);
}

.form-desc {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

.form-input, .form-select, .form-textarea {
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 13.5px;
  outline: none;
  transition: border-color var(--duration-fast) var(--ease);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--border-focus);
}

/* Custom Select Dropdown - Completely replaces ugly default white browser button */
.form-select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-color: #0e0e0e;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23a3a3a3' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 14px;
  padding-right: 38px;
  cursor: pointer;
}

.form-select option {
  background-color: #141414;
  color: #ffffff;
  padding: 10px;
}

/* Eliminate OS default spin buttons on number inputs */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
}

/* ==========================================================================
   Model Management Component (Manual + Auto-Detect)
   ========================================================================== */
.model-manager-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  margin-top: 2px;
}

.model-manager-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.model-mgr-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.model-input-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.model-input-group .form-input {
  flex: 1;
  min-width: 180px;
}

.btn-primary-mini {
  padding: 8px 14px;
  background: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  color: #000000;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease);
}

.btn-primary-mini:hover {
  background: #e5e5e5;
  transform: translateY(-1px);
}

.btn-secondary-mini {
  padding: 8px 14px;
  background: #1e1e1e;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  color: #d1d5db;
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease);
}

.btn-secondary-mini:hover {
  background: #282828;
  border-color: #4b5563;
  color: #ffffff;
  transform: translateY(-1px);
}

/* Saved Models Chips Container */
.saved-models-box {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: #090909;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}

.saved-models-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.saved-models-label {
  font-size: 11.5px;
  color: var(--text-muted);
  font-weight: 500;
}

.model-chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 28px;
  align-items: center;
}

.model-chips-container.empty {
  font-size: 12px;
  color: #555555;
  font-style: italic;
}

.model-tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: #141414;
  border: 1px solid #282828;
  border-radius: var(--radius-full);
  color: #cccccc;
  font-size: 12px;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  user-select: none;
}

.model-tag-chip:hover {
  background: #202020;
  border-color: #444444;
  color: #ffffff;
}

.model-tag-chip.active {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
  font-weight: 600;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.15);
}

.model-tag-chip.active .remove-model-tag-btn {
  color: #666666;
}

.model-tag-chip.active .remove-model-tag-btn:hover {
  color: #000000;
}

.remove-model-tag-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 2px;
}

.remove-model-tag-btn:hover {
  color: var(--accent-red);
}

/* Quick Model Suggestions */
.model-suggestions-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 2px;
}

.sugg-label {
  font-size: 11px;
  color: var(--text-muted);
}

.sugg-chips-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.sugg-chip {
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 11px;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
}

.sugg-chip:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--text-primary);
  color: #ffffff;
  transform: translateY(-1px);
}

.cors-hint-note {
  font-size: 11px;
  color: #777777;
  line-height: 1.4;
  margin-top: 2px;
}

/* Premium Buttons */
.btn-secondary {
  padding: 8px 18px;
  background: #161616;
  border: 1px solid #2e2e2e;
  border-radius: var(--radius-full);
  color: #d1d5db;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease);
}

.btn-secondary:hover {
  background: #222222;
  border-color: #4b5563;
  color: #ffffff;
  transform: translateY(-1px);
}

.range-slider {
  accent-color: #ffffff;
  cursor: pointer;
}

/* Connection Test Status */
.test-status-box {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-dot.success { background: var(--accent-green); box-shadow: 0 0 8px var(--accent-green); }
.status-dot.error { background: var(--accent-red); box-shadow: 0 0 8px var(--accent-red); }
.status-dot.loading { background: var(--accent-blue); animation: blink 600ms infinite; }

/* Modern Sliding Toggle Switches (Zero boxy standard checkboxes) */
.settings-toggle-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  gap: 12px;
}

.toggle-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toggle-title {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-primary);
}

.toggle-desc {
  font-size: 11.5px;
  color: var(--text-muted);
}

.modern-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
  cursor: pointer;
}

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

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #242424;
  border: 1px solid #383838;
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease);
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 2px;
  background-color: #888888;
  border-radius: 50%;
  transition: all var(--duration-fast) var(--ease);
}

.modern-switch input:checked + .switch-slider {
  background-color: #ffffff;
  border-color: #ffffff;
}

.modern-switch input:checked + .switch-slider:before {
  transform: translateX(20px);
  background-color: #050505;
}

/* Language Cards Grid */
.lang-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
  margin-top: 6px;
}

.lang-card {
  padding: 14px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.lang-card:hover {
  background: var(--bg-card-hover);
  border-color: #383838;
}

.lang-card.active {
  background: #1e1e1e;
  border-color: #ffffff;
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.08);
}

.lang-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-flag {
  font-size: 11px;
  font-weight: 700;
  background: #2a2a2a;
  color: var(--text-primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
}

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

.lang-sub {
  font-size: 12px;
  color: var(--text-muted);
}

/* Data & Privacy Actions */
.data-actions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 6px;
}

.btn-data-action {
  padding: 11px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--duration-fast) var(--ease);
  text-align: left;
}

.btn-data-action:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

.btn-data-action.danger {
  color: var(--accent-red);
}

.btn-data-action.danger:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--accent-red);
}

.privacy-badge-box {
  padding: 14px 16px;
  background: #090909;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-top: var(--space-4);
}

.privacy-badge-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.privacy-badge-text {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Modal Footer */
.modal-footer {
  height: 64px;
  padding: 0 var(--space-6);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  background: #090909;
  flex-shrink: 0;
}

.btn-primary {
  padding: 9px 22px;
  background: #ffffff;
  border: 1px solid #ffffff;
  border-radius: var(--radius-full);
  color: #000000;
  font-weight: 600;
  font-size: 13.5px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease);
  box-shadow: 0 2px 10px rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  background: #e6e6e6;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.25);
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 10px 16px;
  background: #181818;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: toastSlide 200ms var(--ease);
  pointer-events: auto;
}

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

/* ==========================================================================
   Responsive Breakpoints & Media Queries
   ========================================================================== */

/* Tablet and Mobile (< 1024px) */
@media (max-width: 1024px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 270px;
    transform: translateX(0);
    box-shadow: 10px 0 35px rgba(0, 0, 0, 0.85);
  }

  .sidebar.collapsed {
    transform: translateX(-100%) !important;
    width: 270px !important;
    visibility: hidden !important;
  }

  .sidebar-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 55;
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease);
  }

  .sidebar-backdrop.active {
    display: block;
    opacity: 1;
  }

  #subject-chips {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    scrollbar-width: none;
    padding-bottom: 4px;
  }

  #subject-chips::-webkit-scrollbar {
    display: none;
  }
}

/* Mobile Screen (< 640px) - iPhone & Android Optimization */
@media (max-width: 640px) {
  .chat-header {
    height: 48px;
    min-height: calc(48px + env(safe-area-inset-top, 0px));
    padding: env(safe-area-inset-top, 0px) 6px 0 6px;
    gap: 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .header-left {
    display: flex;
    align-items: center;
    gap: 4px;
    min-width: 0;
    flex-shrink: 1;
  }

  .header-right {
    display: flex;
    align-items: center;
    gap: 3px;
    flex-shrink: 0;
  }

  .model-pill {
    padding: 4px 7px;
    font-size: 11.5px;
    gap: 4px;
    max-width: 120px;
  }

  .pill-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 11.5px;
  }

  .pill-model-name {
    display: none;
  }

  .usage-pill {
    padding: 4px 6px;
    font-size: 10.5px;
    gap: 3px;
    max-width: 95px;
  }

  .usage-pill-text {
    font-size: 10.5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .usage-mini-bar-track {
    display: none;
  }

  .icon-button {
    width: 32px;
    height: 32px;
    min-width: 32px;
    padding: 0;
  }

  #chat-scroll-container {
    padding: 0 var(--space-2) 4px var(--space-2);
  }

  #chat-hero {
    padding: var(--space-2) var(--space-2);
    justify-content: center;
  }

  .glow-orb {
    width: 88px;
    height: 88px;
    margin-bottom: 10px;
  }

  .glow-circle-1 { width: 88px; height: 88px; }
  .glow-circle-2 { width: 64px; height: 64px; }
  .glow-circle-3 { width: 42px; height: 42px; }
  .glow-circle-3 svg { width: 20px; height: 20px; }

  .chat-headline {
    font-size: 19px;
    margin-bottom: 4px;
  }

  .chat-subheadline {
    font-size: 12px;
    line-height: 1.4;
    max-width: 300px;
  }

  #subject-chips {
    margin-bottom: 8px;
    gap: 6px;
  }

  .subject-chip {
    padding: 4px 10px;
    font-size: 11.5px;
  }

  #chat-composer-wrapper {
    padding: 0 6px calc(10px + env(safe-area-inset-bottom, 8px)) 6px;
    width: 100%;
    max-width: 100%;
  }

  #input-box {
    border-radius: 20px;
    padding: 5px 6px 5px 10px;
  }

  .input-row {
    gap: 4px;
  }

  .input-sparkle {
    display: none;
  }

  #message-input {
    font-size: 14px;
    min-height: 22px;
    padding: 4px 0;
    line-height: 1.4;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  #message-input::-webkit-scrollbar {
    display: none;
  }

  .model-switcher-btn {
    padding: 4px 7px;
    font-size: 11px;
    max-width: 100px;
    gap: 3px;
  }

  .send-btn {
    width: 32px;
    height: 32px;
    min-width: 32px;
  }

  .message-bubble {
    max-width: 92%;
  }

  .modal-card {
    border-radius: var(--radius-lg);
  }

  .modal-header {
    padding: 0 var(--space-4);
  }

  .modal-body {
    padding: var(--space-4);
  }

  .modal-footer {
    padding: 0 var(--space-4);
  }
}

/* ==========================================================================
   Spacious Prompt Text Editor Modal
   ========================================================================== */
.prompt-editor-card {
  max-width: 800px;
  width: 92%;
  height: 75vh;
  max-height: 640px;
  display: flex;
  flex-direction: column;
}

.prompt-editor-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: var(--space-4);
  background: #0a0a0a;
  overflow: hidden;
  gap: 8px;
}

.expanded-textarea {
  flex: 1;
  width: 100%;
  background: #121212;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 15px;
  line-height: 1.6;
  padding: 14px 16px;
  resize: none;
  outline: none;
  transition: border-color var(--duration-fast) var(--ease);
}

.expanded-textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.prompt-editor-stats {
  display: flex;
  justify-content: flex-end;
  gap: 14px;
  font-size: 12px;
  color: var(--text-muted);
  padding: 0 4px;
}

.prompt-editor-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px var(--space-6);
  border-top: 1px solid var(--border-subtle);
  background: #090909;
}

/* ==========================================================================
   Usage & Token Analytics Tab Styles
   ========================================================================== */
.usage-overview-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 16px;
  background: #111111;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
}

.usage-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.usage-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 2px;
}

.usage-active-model-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.badge-auto-detect {
  font-size: 10.5px;
  font-weight: 600;
  padding: 2px 7px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #10b981;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.usage-model-name-label {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.usage-context-numbers {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-mono);
}

.usage-num-current {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.usage-num-slash {
  font-size: 14px;
  color: var(--text-muted);
}

.usage-num-max {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.usage-num-unit {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: 2px;
}

.context-progress-wrapper {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.context-progress-bar {
  width: 100%;
  height: 8px;
  background: #1e1e1e;
  border-radius: var(--radius-full);
  overflow: hidden;
}

.context-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #3b82f6);
  border-radius: var(--radius-full);
  transition: width 400ms var(--ease), background 400ms var(--ease);
}

.context-progress-fill.warning {
  background: linear-gradient(90deg, #f59e0b, #ef4444);
}

.context-progress-fill.danger {
  background: #ef4444;
}

.context-progress-labels {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--text-muted);
}

.usage-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 10px;
  margin-top: 4px;
}

.usage-stat-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  background: #0f0f0f;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease);
}

.usage-stat-card:hover {
  background: #141414;
  border-color: var(--border-strong);
}

.stat-card-label {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-secondary);
}

.stat-card-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
  margin-top: 2px;
}

.stat-card-sub {
  font-size: 10.5px;
  color: var(--text-muted);
}

.usage-footer-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
}

.danger-text {
  color: var(--accent-red) !important;
}

/* ==========================================================================
   App Installation (PWA / Webview Standalone) Styles
   ========================================================================== */
.app-install-hero-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  background: #111111;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  flex-wrap: wrap;
}

.app-hero-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  min-width: 250px;
}

.app-hero-icon-img {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  flex-shrink: 0;
}

.app-hero-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.app-hero-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-hero-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.badge-pwa-version {
  font-size: 10.5px;
  font-weight: 600;
  padding: 2px 7px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: #60a5fa;
  border-radius: var(--radius-full);
}

.app-hero-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

.app-hero-action {
  flex-shrink: 0;
}

.install-pwa-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 600;
  background: #ffffff;
  color: #000000;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease);
}

.install-pwa-btn:hover {
  background: #e5e5e5;
  transform: translateY(-1px);
}

.install-guides-header {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 14px;
  margin-bottom: 4px;
}

.install-guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 12px;
}

.install-guide-card {
  display: flex;
  flex-direction: column;
  background: #0f0f0f;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  transition: all var(--duration-fast) var(--ease);
}

.install-guide-card:hover {
  background: #141414;
  border-color: var(--border-strong);
}

.guide-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.guide-platform-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: #181818;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  flex-shrink: 0;
}

.guide-card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.guide-card-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.guide-steps-list {
  margin: 0;
  padding-left: 18px;
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.guide-steps-list li {
  margin-bottom: 5px;
}

.guide-steps-list li strong {
  color: var(--text-primary);
}