:root {
  --font-family-main: 'Inter', 'Segoe UI', 'Helvetica Neue', sans-serif;
  --font-family-mono: 'Courier New', Courier, monospace;

  --color-background: #2B2D3A;
  --color-panel-bg: #202123;
  --color-text-primary: #fff;
  --color-text-secondary: #D1D5DB;
  --color-text-muted: #9CA3AF;
  --color-border: #3C3F52;
  --color-border-hover: #4A4D63;
  --color-accent: #00A67E;
  --color-code-bg: #282c34;
  --color-code-header-bg: #2d303a;
  --color-code-lang-text: #8A8E9B;
  --color-hljs-text: #abb2bf;
  --color-error-text: #ff9e9e;
  --color-overlay-bg: rgba(0, 0, 0, 0.3);
  --color-panel-button-bg-start: #3C3F52;
  --color-panel-button-bg-end: #2B2D3A;
  --color-panel-button-hover-bg-start: #4A4D63;
  --color-panel-button-hover-bg-end: #383A4A;
  --color-history-card-hover-bg: #343541;
  --color-history-card-active-bg: #3C3F52;
  --color-link: #4285F4;

  --panel-width: 280px;
}
body {
  margin: 0;
  font-family: var(--font-family-main);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  font-size: 16px;
}

@media (max-width: 800px) {
  body {
    text-size-adjust: 100%;
  }  

}
.menu-toggle-checkbox {
  display: none;
}

.page-header {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1001;
  display: flex;
}
.page-header__menu-toggle {
  width: auto;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  background-color: var(--color-background);
  color: var(--color-text-primary);
  font-size: 16px;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 4px;
  font-family: var(--font-family-main);
  transition: background-color 0.3s ease;
}

.page-header__menu-toggle#sandwich-toggle-button {
    padding: 8px;
    box-sizing: border-box;
}

.panel {
  height: 100%;
  background-color: var(--color-panel-bg);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.panel-container {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    overflow: hidden;
}

.panel-container__inner {
    display: flex;
    height: 100%;
}

.panel__header {
  position: sticky;
  top: 0;
  background-color: var(--color-panel-bg);
  height: auto;
  width: 100%;
  z-index: 15;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding: 0;
  box-sizing: border-box;
}

.panel__content {
  flex-grow: 1;
  overflow-y: auto;
  padding-top: 16px;
  padding-bottom: 20px;
}

.panel__content::-webkit-scrollbar {
  width: 8px;
}

.panel__content::-webkit-scrollbar-track {
  background-color: var(--color-panel-bg);
}

.panel__content::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 4px;
}

.panel__content::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-border-hover);
}

.panel {
  width: var(--panel-width);
}

.history-panel {
  width: var(--panel-width);
}

.model-panel {
  width: var(--panel-width);
}

.panel__actions {
  padding: 16px 8px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background-color: var(--color-panel-bg);
  z-index: 10;
}

.panel__button {
  width: 100%;
  background: linear-gradient(135deg, var(--color-panel-button-bg-start), var(--color-panel-button-bg-end));
  color: var(--color-text-muted);
  border: none;
  padding: 12px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font-family-main);
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  transition: all 0.3s ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  box-sizing: border-box;
  text-decoration: none;
}

.panel__button:hover {
  background: linear-gradient(135deg, var(--color-panel-button-hover-bg-start), var(--color-panel-button-hover-bg-end));
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.panel__button:active {
  transform: translateY(1px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.panel__button[data-action="new-chat"]::before {
  content: "➕ ";
  margin-right: 8px;
}

.panel__button[data-action="delete-chat"]::before {
  content: "🗑️ ";
  margin-right: 8px;
}

.model-panel .model-panel__form {
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.model-panel h2 {
  padding: 8px 0;
  color: var(--color-text-muted);
  font-size: 14px;
  text-transform: uppercase;
  margin-top: 16px;
  margin-bottom: 8px;
  font-weight: 500;
}

.model-panel h2:first-child {
  margin-top: 0;
}

.model-panel .model-panel__option {
  display: flex;
  align-items: center;
  margin-bottom: 8px;
  white-space: nowrap;
}

.model-panel .model-panel__option input[type="radio"] {
  accent-color: var(--color-accent);
  width: 14px;
  height: 14px;
  margin-right: 10px;
  cursor: pointer;
  margin-top: 0;
  flex-shrink: 0;
}

.model-panel .model-panel__option label {
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 14px;
  flex-grow: 1;
  overflow: hidden;
  text-overflow: ellipsis;
}

.model-panel__switcher {
  padding: 0;
  display: flex;
  justify-content: center;
}

.toggle-switch {
  display: inline-flex;
  background-color: var(--color-border);
  border-radius: 30px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-switch input {
  display: none;
}

.toggle-switch__label {
  padding: 12px 20px;
  cursor: pointer;
  position: relative;
  color: var(--color-text-muted);
  font-size: 14px;
  transition: all 0.3s;
  z-index: 1;
  user-select: none;
}

.toggle-switch__label--active {
  background-color: var(--color-accent);
  color: var(--color-text-primary);
}

.toggle-switch label:first-of-type.toggle-switch__label--active {
  border-radius: 30px 0 0 30px;
}

.toggle-switch label:last-of-type.toggle-switch__label--active {
  border-radius: 0 30px 30px 0;
}

.history-panel__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 8px;
}

.history-panel__card {
  display: block;
  padding: 8px 16px;
  color: var(--color-text-muted);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-radius: 6px;
  transition: background-color 0.2s ease;
}

.history-panel__card:hover {
  background-color: var(--color-history-card-hover-bg);
}

.history-panel__card--active, .history-panel__card--active:hover {
  background-color: var(--color-history-card-active-bg);
}

.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-overlay-bg);
  z-index: 998;
  cursor: default;
  transition: opacity 0.3s ease;
}

@media (max-width: 800px) {
  #main-menu-toggle:checked ~ .overlay {
    display: block;
  }
}

#main-menu-toggle:checked ~ .panel-container {
    transform: translateX(0);
}

#main-menu-toggle:checked ~ .page-header .page-header__menu-toggle {
  background-color: var(--color-panel-bg);
}

.panel__title {
  width: 100%;
  font-size: 18px;
  color: var(--color-text-muted);
  text-align: left;
  font-weight: 500;
  height: 60px;
  display: flex;
  align-items: center;
  padding: 0 16px 0 60px;
  box-sizing: border-box;
}

.panel__title a {
    color: var(--color-text-muted);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

.panel__title a:hover {
    text-decoration: underline;
}
.chat {
  max-width: 800px;
  margin: 0 auto;
}

@media (max-width: 800px) {
  .chat {
    max-width: 100%;
  }
}

.chat__message {
  padding: 10px;
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.chat-form {
  padding: 10px;
  border-bottom: none;
  position: sticky;
  bottom: 0;
  background-color: var(--color-background);
  z-index: 20;
}

.message__role {
  background-color: var(--color-border);
  color: var(--color-text-primary);
  border-radius: 12px;
  padding: 4px 10px;
  display: block;
  width: fit-content;
}

.message__content {
  color: var(--color-text-secondary);
  margin-top: 10px;
  margin-left: 30px;
  display: block;
  word-break: break-word;
}

.chat-form__input {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  width: calc(100% - 30px);
  padding: 16px;
  color: var(--color-text-primary);
  box-sizing: border-box;
  resize: vertical;
  overflow-y: hidden;
  min-height: 50px;
  margin-top: 20px;
  margin-left: 30px;
  display: block;
}

.message__edit-textarea {
    width: 100%;
    box-sizing: border-box;
    min-height: 80px;
    resize: vertical;
    background-color: var(--color-background);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-hover);
    border-radius: 4px;
    padding: 8px;
    font: inherit;
    line-height: 1.4;
    overflow-y: hidden;
}

.chat-form__model-info {
  color: var(--color-text-muted);
  font-size: 14px;
  margin-top: 10px;
  margin-left: 30px;
  margin-bottom: 10px;
}

@keyframes blink {
  50% { opacity: 0; }
}

.message__content--streaming::after {
    content: '▋';
    animation: blink 1s step-end infinite;
}

.message__content p, 
.message__content li,
.message__content blockquote {
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message__content table {
    width: 100%;
    table-layout: fixed;
    overflow-wrap: break-word;
}

.chat-form__controls {
  position: relative;
  margin-left: 30px;
}

.button-group {
  display: flex;
  flex-grow: 1;
  justify-content: center;
  gap: 10px;
}

.button {
  background-color: var(--color-accent);
  color: var(--color-text-primary);
  border: none;
  padding: 8px 16px;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-family-main);
  font-size: 16px;
  text-decoration: none;
  display: inline-block;
  min-width: 120px;
  text-align: center;
}
.message__content .code-block {
    position: relative;
    background-color: var(--color-code-bg);
    border-radius: 8px;
    margin: 1em 0;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.code-block__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 10px;
    background-color: var(--color-code-header-bg);
    border-bottom: 1px solid var(--color-code-bg);
}

.code-block__lang {
    color: var(--color-code-lang-text);
    font-size: 11px;
    font-family: sans-serif;
    text-transform: uppercase;
}

.code-block__copy-button {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
    opacity: 0.7;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    position: relative;
    transition: color 0.15s ease;
}

.code-block__copy-button:active {
    color: var(--color-text-primary);
}

.code-block__copy-button svg {
    width: 12px;
    height: 12px;
}

.message__content .code-block code {
    display: block;
    padding: 16px;
    overflow-x: auto;
    font-family: var(--font-family-mono);
    font-size: 14px;
    line-height: 1.4;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.hljs {
    background: transparent;
    color: var(--color-hljs-text);
} 

.panel__button::before {
  filter: grayscale(85%);
} 

.icon {
  filter: grayscale(85%);
  margin-right: 8px;
} 

.content-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.content-page__columns {
    display: flex;
    gap: 40px;
    margin-top: 20px;
}

.content-page__column {
    flex: 1;
}

.content-page__column h3 {
    margin-top: 0;
}

@media (max-width: 600px) {
    .content-page__columns {
        flex-direction: column;
        gap: 20px;
    }
}

.content-page a:not(.button) {
    text-decoration: none;
    color: inherit;
    position: relative;
}

.content-page a:not(.button):hover {
    opacity: 0.8;
} 

.link-highlight {
    color: var(--color-link);
}

.message__content--error {
    color: var(--color-error-text);
    white-space: pre-wrap;
    font-family: monospace;
}

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

.message__menu {
    opacity: 0;
    visibility: hidden;
    position: absolute;
    bottom: 5px;
    right: 5px;
    background-color: transparent;
    z-index: 10;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    display: flex;
    gap: 8px;
}

.chat__message:hover .message__menu {
    opacity: 1;
    visibility: visible;
}

.chat__message--editing .message__menu {
    display: none !important;
}

.chat__message--generating .message__menu {
    display: none !important;
}

.message-menu__button {
    cursor: pointer;
    font-size: 16px;
    color: var(--color-text-secondary);
    transition: color 0.1s ease-in-out;
    user-select: none;
    padding: 2px;
}

.message-menu__button svg {
    width: 16px;
    height: 16px;
    pointer-events: none;
}

.message-menu__button:active {
    color: var(--color-text-primary);
}

.chat__message--error .message__menu {
    display: none !important;
}

@keyframes flashWhite {
  0%   { color: inherit; }
  50%  { color: var(--color-text-primary); }
  100% { color: inherit; }
}

.flash-white {
  animation: flashWhite 0.4s ease-in-out;
}
.message-menu__actions {
    display: flex;
    gap: 8px;
}

.message-menu__confirm-delete {
    display: none;
    gap: 8px;
    align-items: center;
}

.message__edit-actions {
    margin-top: 8px;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding-right: 30px;
}

.icon-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: color 0.1s ease-in-out;
}

.icon-button svg {
    width: 16px;
    height: 16px;
}

/* --- Состояние генерации --- */

/* По умолчанию кнопка "Стоп" скрыта */
#stop-button {
    display: none;
}

/* Когда у body есть класс .is-generating */
.is-generating #generate-button,
.is-generating .chat-form__input,
.is-generating #user-input-label {
    display: none;
}
.is-generating #stop-button {
    display: inline-block;
}