/* Config */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    Arial,
    sans-serif;
}

:root {
  --color-bg-body: #f8f9fa;
  --color-bg-surface: #ffffff;
  --color-bg-header: rgba(255, 255, 255, 0.95);
  --color-bg-muted: #f1f3f4;
  --color-bg-hover: #f8f9fa;
  --color-border: #e3e3e3;
  --color-border-strong: #dadce0;

  --color-text-primary: #1f1f1f;
  --color-text-secondary: #444746;
  --color-text-tertiary: #757575;

  --color-accent: #0b57d0;
  --color-accent-hover: #0842a0;
  --color-accent-hover-bg: #e8f0fe;
  --color-accent-soft: #e8f0fe;

  --color-success: #146c2e;
  --color-error: #b3261e;
  --color-error-soft: #f9dedc;
  --color-loading: #444746;

  --color-avatar-bot: #f1f3f4;
  --color-avatar-bot-icon: #0b57d0;
  --color-avatar-user: #0b57d0;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  --shadow-sm:
    0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --shadow-md:
    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-modal:
    0 24px 38px 3px rgba(0, 0, 0, 0.14), 0 9px 46px 8px rgba(0, 0, 0, 0.12),
    0 11px 15px -7px rgba(0, 0, 0, 0.2);

  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-medium: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body.dark-theme {
  --color-bg-body: #131314;
  --color-bg-surface: #1e1e1e;
  --color-bg-header: rgba(30, 30, 30, 0.95);
  --color-bg-muted: #2d2f31;
  --color-bg-hover: #2a2b2c;
  --color-border: #444746;
  --color-border-strong: #5f6368;

  --color-text-primary: #e3e3e3;
  --color-text-secondary: #c4c7c5;
  --color-text-tertiary: #a8abae;

  --color-accent: #a8c7fa;
  --color-accent-hover: #d3e3fd;
  --color-accent-hover-bg: rgba(168, 199, 250, 0.12);
  --color-accent-soft: rgba(168, 199, 250, 0.08);

  --color-avatar-bot: #444746;
  --color-avatar-bot-icon: #a8c7fa;
  --color-avatar-user: #a8c7fa;
}

body,
html {
  height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-body);
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition:
    background-color var(--transition-medium),
    color var(--transition-medium);
}

header,
.sidebar-left,
.sidebar-right,
.chat-section,
.chat-header,
.file-chip,
.input-area,
.content,
.modal-container,
.modal-upload-box {
  transition:
    background-color var(--transition-medium),
    border-color var(--transition-medium),
    color var(--transition-medium),
    box-shadow var(--transition-medium),
    width 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    padding 0.3s ease;
}

.github-link {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  margin-left: 80%;
}

.github-link i {
  color: var(--color-text-secondary);
  font-size: 16px;
}

.github-link:hover:not(.disabled) {
  background-color: var(--color-bg-hover);
  border-color: var(--color-border-strong);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.github-link.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.settings-btn {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  margin-left: auto;
}

.settings-btn i {
  color: var(--color-text-secondary);
  font-size: 16px;
}

.settings-btn:hover:not(.disabled) {
  background-color: var(--color-bg-hover);
  border-color: var(--color-border-strong);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.settings-btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[contenteditable]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Layout */
header {
  height: 64px;
  background-color: var(--color-bg-surface);
  display: flex;
  align-items: center;
  padding: 0 24px;
  flex-shrink: 0;
  box-shadow: 0 1px 0 0 var(--color-border);
  z-index: 100;
}

.logo {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.app-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
  padding: 0 16px 16px 16px;
  margin: 20px;
}

.sidebar-left,
.sidebar-right {
  width: 320px;
  background-color: var(--color-bg-surface);
  padding: 24px 20px;
  overflow-y: auto;
  flex-shrink: 0;
  border-radius: 24px;
  border: 1px solid var(--color-border);
  clip-path: inset(0 round 24px);
  transition:
    width 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    padding 0.3s ease;
  overflow-x: hidden;
  position: relative;
}

.sidebar-left::-webkit-scrollbar,
.sidebar-right::-webkit-scrollbar {
  width: 7px;
}
.sidebar-left::-webkit-scrollbar-track,
.sidebar-right::-webkit-scrollbar-track {
  background: transparent;
}
.sidebar-left::-webkit-scrollbar-thumb,
.sidebar-right::-webkit-scrollbar-thumb {
  border-radius: 12px;
  border: 4px solid transparent;
  background-clip: padding-box;
  background: var(--color-border-strong);
}

.resizer {
  width: 10px;
  background-color: transparent;
  cursor: ew-resize;
  flex-shrink: 0;
  transition:
    width 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    margin 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    background-color var(--transition-fast);
  z-index: 10;
  position: relative;
  clip-path: inset(0 round 24px 24px 24px 24px);
}

.resizer:hover,
.resizer.active {
  background-color: var(--color-border-strong);
}

body.is-resizing {
  user-select: none;
  cursor: ew-resize;
}

body.is-resizing .sidebar-left,
body.is-resizing .sidebar-right {
  transition: none !important;
}

.sidebar-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.source-header,
.extension-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--color-border);
}

.toggle-sidebar-btn {
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.toggle-sidebar-btn:hover {
  background-color: rgba(31, 31, 31, 0.08);
  color: var(--color-text-primary);
}

.sidebar-left.is-collapsed,
.sidebar-right.is-collapsed {
  width: 0 !important;
  min-width: 0 !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
  border: none;
  overflow: visible !important;
}

.sidebar-left.is-collapsed > *:not(.source-header),
.sidebar-right.is-collapsed > *:not(.extension-header) {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.sidebar-left.is-collapsed .sidebar-title,
.sidebar-right.is-collapsed .sidebar-title {
  opacity: 0;
  visibility: hidden;
}

.sidebar-left.is-collapsed .toggle-sidebar-btn,
.sidebar-right.is-collapsed .toggle-sidebar-btn {
  position: absolute;
  top: 16px;
  z-index: 100;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  width: 36px;
  height: 36px;
  border-radius: 50%;
}

.sidebar-left.is-collapsed .toggle-sidebar-btn {
  left: 16px;
}

.sidebar-right.is-collapsed .toggle-sidebar-btn {
  right: 16px;
}

.resizer.hidden {
  width: 0;
  margin-left: 0;
  margin-right: 0;
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 960px) {
  .sidebar-right {
    display: none;
  }
}

/* Chat Interface */
.chat-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-surface);
  position: relative;
  border-radius: 24px;
  border: 1px solid var(--color-border);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.03);
  overflow: hidden;
}

.chat-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 0, 0, 0.05),
    transparent
  );
  z-index: 5;
}

.chat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  background-color: var(--color-bg-header);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.chat-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  background: transparent;
  border: none;
  outline: none;
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
}

main#chat-box {
  flex: 1;
  overflow-y: auto;
  padding: 32px;
  display: flex;
  justify-content: center;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

main#chat-box::-webkit-scrollbar {
  width: 7px;
}
main#chat-box::-webkit-scrollbar-track {
  background: transparent;
}
main#chat-box::-webkit-scrollbar-thumb {
  border-radius: 12px;
  background: var(--color-border-strong);
}
main#chat-box::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

.chat-area {
  width: 100%;
  max-width: 840px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-bottom: 24px;
}

.message-ai,
.message-users {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 85%;
  animation: fadeIn 0.3s ease;
}

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

.message-ai {
  align-self: flex-start;
}

.message-users {
  align-self: flex-end;
  align-items: flex-end;
}

.message-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}

.content {
  padding: 16px 20px;
  border-radius: var(--radius-xl);
  font-size: 15px;
  line-height: 1.6;
  max-width: 400px;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.message-ai .content {
  background-color: var(--color-bg-muted);
  color: var(--color-text-primary);
  border-top-left-radius: 4px;
}

.message-users .content {
  background-color: var(--color-accent-soft);
  color: var(--color-text-primary);
  border-top-right-radius: 4px;
}

footer {
  padding: 24px 32px 32px;
  display: flex;
  justify-content: center;
  background-color: var(--color-bg-surface);
  background: linear-gradient(
    0deg,
    var(--color-bg-surface) 80%,
    transparent 100%
  );
}

.input-area {
  width: 100%;
  max-width: 850px;
  display: flex;
  align-items: flex-end;
  background-color: var(--color-bg-muted);
  border-radius: var(--radius-xl);
  padding: 12px 16px;
  border: 1px solid transparent;
  transition:
    background-color var(--transition-fast),
    box-shadow var(--transition-fast);
  position: relative;
}

.input-area:focus-within {
  background-color: var(--color-bg-surface);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

textarea#chat-input {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  resize: none;
  font-size: 15px;
  padding: 12px 100px 12px 12px;
  color: var(--color-text-primary);
  max-height: 200px;
  overflow-y: auto;
  line-height: 1.5;
}

textarea#chat-input::placeholder {
  color: var(--color-text-tertiary);
}

textarea#chat-input::-webkit-scrollbar {
  display: none;
}

button#send-btn {
  position: absolute;
  right: 16px;
  bottom: 16px;
  background: var(--color-accent);
  border: none;
  color: #ffffff;
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition:
    background-color var(--transition-fast),
    transform 0.1s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

button#send-btn:hover {
  background-color: var(--color-accent-hover);
}

button#send-btn:active {
  transform: scale(0.95);
}

button#send-btn:disabled {
  background-color: var(--color-border-strong);
  color: var(--color-text-tertiary);
  cursor: not-allowed;
  box-shadow: none;
}

button#send-btn svg {
  width: 18px;
  height: 18px;
}

.attach-file-btn {
  position: absolute;
  right: 64px;
  bottom: 16px;
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition:
    background-color var(--transition-fast),
    transform 0.1s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.attach-file-btn:hover {
  background-color: var(--color-bg-muted);
}

.files-count {
  position: absolute;
  top: -10px;
  right: -10px;
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 12px;
}

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

.selected-files-header input[type="checkbox"] {
  margin-right: 8px;
}

.selected-files-list ul {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 50vh;
  overflow-y: auto;
  overflow-x: hidden;
}

.selected-files-list ul::-webkit-scrollbar {
  width: 7px;
}
.selected-files-list ul::-webkit-scrollbar-track {
  background: transparent;
}
.selected-files-list ul::-webkit-scrollbar-thumb {
  border-radius: 12px;
  background: var(--color-border-strong);
}
.selected-files-list ul::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-secondary);
}

.selected-files-list ul li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.selected-files-list ul li input[type="checkbox"] {
  margin-right: 8px;
}

.selected-files-list ul li {
  padding: 8px 12px;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--color-text-primary);
}

.selected-files-list ul li:hover {
  background-color: var(--color-bg-hover);
  cursor: pointer;
}

.selected-files-list ul li input[type="checkbox"]:checked {
  accent-color: var(--color-accent);
}

/* File Management */
.upload-btn,
.new-chat-btn {
  padding: 10px 20px;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition:
    background-color var(--transition-fast),
    box-shadow var(--transition-fast);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.upload-btn {
  width: 100%;
  margin-bottom: 12px;
  color: var(--color-accent);
  background-color: var(--color-accent-soft);
  border: none;
  box-shadow: none;
}

.upload-btn:hover {
  background-color: rgba(11, 87, 208, 0.15);
}

.new-chat-btn:hover {
  background-color: var(--color-bg-hover);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.file-item {
  padding: 12px 16px;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--color-text-primary);
}

.empty-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 48px 16px;
  background-color: var(--color-bg-surface);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--color-border-strong);
}

.empty-icon {
  font-size: 48px;
  color: var(--color-border-strong);
  margin-bottom: 16px;
}

.empty-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.empty-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  max-width: 240px;
  line-height: 1.5;
  margin-bottom: 24px;
}

.empty-link {
  font-weight: 500;
  color: var(--color-accent);
  cursor: pointer;
  text-decoration: none;
}

.empty-link:hover {
  text-decoration: underline;
}

#file-list:has(.file-chip) .empty-message {
  display: none;
}

.extension-placeholder {
  font-size: 14px;
  color: var(--color-text-tertiary);
  line-height: 1.5;
  padding: 16px 0;
}

#file-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  align-items: flex-start;
  overflow-y: auto;
  overflow-x: hidden;
}

.file-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  max-width: 100%;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--color-text-primary);
  cursor: pointer;
  user-select: none;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast);
}

.file-chip:hover {
  background-color: var(--color-bg-hover);
  border-color: var(--color-border-strong);
}

.file-chip-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background-color: var(--color-accent-soft);
  border-radius: 6px;
  color: var(--color-accent);
}

.file-chip-icon svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.file-chip-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-grow: 1;
  font-weight: 500;
}

.file-chip-status {
  font-size: 14px;
  margin-left: 4px;
}

.status-loading {
  color: var(--color-text-tertiary);
  animation: spin 1s linear infinite;
  display: inline-block;
}

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

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

.file-chip.is-selected {
  background-color: var(--color-accent-soft);
  border-color: var(--color-accent);
  color: var(--color-accent-hover);
}

.file-chip.is-selected .file-chip-icon {
  background-color: var(--color-accent);
  color: #ffffff;
}

.action-toolbar {
  display: none;
  gap: 8px;
  margin-top: 5px;
  margin-bottom: 5px;
}

.action-toolbar button {
  flex: 1;
  padding: 8px 8px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
}

#select-all-btn {
  background-color: var(--color-bg-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

#select-all-btn:hover {
  background-color: var(--color-bg-muted);
}

#batch-delete-btn {
  background-color: var(--color-error-soft);
  color: var(--color-error);
  border: none;
  display: none;
}

#batch-delete-btn:hover {
  background-color: #fce8e6;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(31, 31, 31, 0.4);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--transition-medium),
    visibility var(--transition-medium);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background-color: var(--color-bg-surface);
  color: var(--color-text-primary);
  width: 90%;
  max-width: 600px;
  border-radius: var(--radius-xl);
  padding: 40px;
  position: relative;
  box-shadow: var(--shadow-modal);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transform: translateY(20px) scale(0.98);
  opacity: 0;
  transition:
    transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    opacity var(--transition-medium);
}

.modal-overlay.active .modal-container {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  border: none;
  border-radius: 50%;
  color: var(--color-text-secondary);
  font-size: 18px;
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
}

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

.modal-title {
  text-align: center;
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 32px;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.modal-search {
  display: flex;
  align-items: center;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 12px 20px;
  margin-bottom: 32px;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.modal-search:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-accent-soft);
}

.modal-search input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--color-text-primary);
  font-size: 15px;
}

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

.modal-search button {
  background: transparent;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  font-size: 16px;
  transition: color var(--transition-fast);
}

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

.modal-upload-box {
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  background-color: var(--color-bg-muted);
  transition:
    border-color var(--transition-medium),
    background-color var(--transition-medium);
}

.modal-upload-box:hover,
.modal-upload-box.drag-over {
  border-color: var(--color-accent);
  background-color: var(--color-accent-soft);
}

.modal-subtitle {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--color-text-primary);
}

.modal-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.modal-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.modal-btn {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.modal-btn i {
  color: var(--color-text-secondary);
  font-size: 16px;
}

.modal-btn:hover:not(.disabled) {
  background-color: var(--color-bg-hover);
  border-color: var(--color-border-strong);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.modal-btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.add-source-btn {
  border-radius: var(--radius-pill);
  justify-content: center;
  margin-bottom: 24px;
}

.paste-input-area {
  min-height: 200px;
  max-height: 400px;
  overflow-y: auto;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.paste-input-area:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-accent-soft);
  outline: none;
}

.paste-input-area:empty:before {
  content: attr(data-placeholder);
  color: var(--color-text-tertiary);
  display: block;
}

.paste-info {
  text-align: right;
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 24px;
}

/* Web Search Results */
.search-results-list {
  margin-top: 16px;
  max-height: 240px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-right: 4px;
}

.search-results-list::-webkit-scrollbar {
  width: 6px;
}
.search-results-list::-webkit-scrollbar-track {
  background: transparent;
}
.search-results-list::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 10px;
}

.search-result-item {
  padding: 16px;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-medium);
}

.search-result-item:hover {
  background-color: var(--color-bg-hover);
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.search-result-item h4 {
  margin: 0 0 6px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.4;
  transition: color var(--transition-fast);
}

.search-result-item:hover h4 {
  color: var(--color-accent);
}

.search-result-item p {
  margin: 0;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Settings Modal Elements */
.setting-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-medium);
  flex-wrap: wrap;
}
.setting-item:hover {
  background-color: var(--color-bg-hover);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}
.setting-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  border-radius: 50%;
  font-size: 20px;
  flex-shrink: 0;
}
.setting-info {
  flex: 1 1 200px;
}
.setting-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}
.setting-description {
  font-size: 13px;
  color: var(--color-text-secondary);
}
.setting-control {
  flex: 1 1 200px;
  display: flex;
  justify-content: flex-end;
}
.setting-select {
  width: 100%;
  padding: 12px 36px 12px 16px;
  font-size: 14px;
  color: var(--color-text-primary);
  background-color: var(--color-bg-muted);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='gray'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  transition: all var(--transition-fast);
}
.setting-select:focus {
  outline: none;
  border-color: var(--color-accent);
  background-color: var(--color-bg-surface);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}
.setting-select optgroup {
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-bg-surface);
}
.setting-select option {
  font-weight: normal;
  color: var(--color-text-primary);
  background: var(--color-bg-surface);
}

.modal-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}
.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle-switch .slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg-muted);
  border: 1px solid var(--color-border-strong);
  transition: .4s;
}
.toggle-switch .slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 1px;
  background-color: var(--color-text-secondary);
  transition: .4s;
  border-radius: 50%;
}
.toggle-switch input:checked + .slider {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}
.toggle-switch input:checked + .slider:before {
  background-color: #fff;
  transform: translateX(20px);
}
.toggle-switch .slider.round {
  border-radius: 24px;
}

/* Range Slider */
.range-control {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  width: 100%;
}
.range-control input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  max-width: 150px;
  background: transparent;
}
.range-control input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  margin-top: -6px;
  box-shadow: var(--shadow-sm);
}
.range-control input[type=range]::-webkit-slider-runnable-track {
  width: 100%;
  height: 4px;
  cursor: pointer;
  background: var(--color-border-strong);
  border-radius: 2px;
}
.range-control input[type=range]:focus {
  outline: none;
}
.range-control input[type=range]:focus::-webkit-slider-thumb {
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}
.range-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  min-width: 24px;
  text-align: right;
}


/* Markdown Body Styles */
.markdown-body {
  font-family: inherit;
  line-height: 1.6;
}
.markdown-body p { margin-bottom: 1em; }
.markdown-body p:last-child { margin-bottom: 0; }
.markdown-body strong { font-weight: 600; color: var(--color-text-primary); }
.markdown-body ul, .markdown-body ol {
  padding-left: 1.5em;
  margin-bottom: 1em;
}
.markdown-body li { margin-bottom: 0.25em; }
.markdown-body code {
  background-color: var(--color-surface-hover);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: monospace;
}
.markdown-body pre code {
  display: block;
  padding: 1em;
  overflow-x: auto;
  background-color: var(--color-surface-hover);
}

/* Typing Indicator Animation */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  width: fit-content;
}
.typing-dot {
  width: 6px;
  height: 6px;
  background-color: var(--color-text-secondary);
  border-radius: 50%;
  animation: typing 1.4s infinite ease-in-out both;
}
.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }
@keyframes typing {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

/* Follow-up Suggestions */
.suggestions-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}
.suggestion-btn {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s;
  width: fit-content;
  max-width: 100%;
}
.suggestion-btn:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-text-primary);
  border-color: var(--color-text-secondary);
}