@font-face {
  font-family: "Helvetica Neue";
  src: url("/fonts/HelveticaNeue-Roman.woff2") format("woff2"),
    url("/fonts/HelveticaNeue-Roman.woff") format("woff");
  font-weight: 400;
  font-style: normal;
}

:root {
  /* Fonts */

  --primary-font: "Fredoka", sans-serif;
  --secondary-font: "Helvetica Neue", sans-serif;
  --body-font: "Inter", sans-serif;

  /* Color Scheme */
  --blue: #0780b5;
  --dark: #061820;
  --dark-grey: #8c9fa7;
  --light-blue: #96d2ed;
  --light: #f4fbfe;
  --white: #fefefe;

  /* Dark Theme (Default) */
  --bg-color: var(--dark);
  --login-bg: var(--dark);
  --sidebar-bg: var(--dark);

  --primary-color: var(--blue);
  --primary-color-hover: var(--light-blue);
  --primary-color-light: var(--light);

  /* For active session highlight */

  --text-color: var(--white);
  --text-color-light: var(--light-blue);
  --text-color-inverted: var(--light);
  --text-color-accent: var(--light-blue);

  --message-user-bg: var(--light-blue);
  --message-assistant-bg: rgba(244, 251, 254, 0.2);

  --border-color: rgba(115, 210, 237, 0.2);
  --input-bg: rgba(244, 251, 254, 0.2);
  --input-border-focus: var(--primary-color);
  --error-color: #e57373;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -2px rgba(0, 0, 0, 0.2),
    0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3),
    0 4px 6px -4px rgb(0 0 0 / 0.3);

  --subtle-bg: rgba(255, 255, 255, 0.1);

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
    "Segoe UI Symbol";
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;
}

/* Light Theme applied via class on <html> tag */
html.light-theme {
  --bg-color: var(--white);
  --bg-color-light: var(--light);
  --sidebar-bg: var(--white);
  --chat-bg: var(--white);
  --login-bg: var(--light);

  --primary-color-light: rgba(7, 127, 180, 0.1);

  --text-color: var(--dark);
  --text-color-light: var(--dark-grey);
  --text-color-inverted: var(--light);
  --text-color-accent: var(--blue);

  --message-user-bg: rgba(150, 210, 237, 0.5);
  --message-assistant-bg: rgba(140, 159, 167, 0.1);

  --border-color: rgba(140, 159, 167, 0.2);
  --input-bg: var(--light);
  --input-border-focus: var(--primary-color);
  --error-color: #ef4444;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.05);

  --subtle-bg: rgba(0, 0, 0, 0.05);
}

h1 {
  font-family: var(--primary-font);
  font-weight: 500;
  font-size: 50px;
  letter-spacing: -2%;
}

h2 {
  font-family: var(--primary-font);
  font-weight: 500;
  font-size: 40px;
  letter-spacing: -2%;
}

h3 {
  font-family: var(--secondary-font);
  font-weight: 700;
  font-size: 24px;
  letter-spacing: -2%;
}

.subtitle {
  font-family: var(--secondary-font);
  font-weight: 400;
  font-style: italic;
  font-size: 24px;
}

p {
  font-family: var(--body-font);
  font-weight: 400;
  font-size: 16px;
  line-height: 140%;
}

.smaller-text {
  font-family: var(--body-font);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 3%;
}

.pre-title {
  font-family: var(--secondary-font);
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 3%;
}

.button-text {
  font-family: var(--secondary-font);
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 4%;
}

.link-text {
  font-family: var(--secondary-font);
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 4%;
  text-decoration: underline;
}

html,
body {
  height: 100%;
  min-height: 100dvh;
  width: 100%;
  max-width: 100vw; /* Use vw to be strict */
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-color);
  overflow: hidden; /* Prevents the 'entire page' from scrolling */
  position: fixed; /* Extra safety for mobile browsers */
}

.hidden {
  display: none !important;
}

/* --- Login View --- */
#login-view {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 90vh;
  padding: 16px;
  background-color: var(--login-color);
}

#login-logo {
  width: 80px;
  height: 80px;
}

#login-header {
  display: flex;
  gap: 20px;
  justify-content: center;
  align-items: center;
}

#login-header h1 {
  color: var(--text-color);
}

#login-form {
  padding: 40px;
  width: 100%;
  max-width: 450px;
  box-sizing: border-box;
}

#login-form .input-group {
  margin-bottom: 30px;
}

#login-form label {
  display: block;
  color: var(--text-color);
  text-transform: uppercase;
  margin-bottom: 10px;
}

#login-form input {
  width: 100%;
  padding: 15px 20px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--input-bg);
  color: var(--text-color);
  font-weight: 500;
  box-sizing: border-box;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#login-form input:focus {
  outline: none;
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 2px rgba(32, 159, 213, 0.3);
}

#login-form button {
  width: 100%;
  padding: 15px 20px;
  border: none;
  border-radius: var(--border-radius-md);
  background-color: var(--blue);
  color: var(--white);
  cursor: pointer;
  transition: background-color 0.2s;
  font-family: var(--secondary-font);
  font-weight: 300;
  font-size: 16px;
  letter-spacing: 4%;
}

#login-form button:hover {
  background-color: var(--primary-color-hover);
}

#login-error {
  color: var(--error-color);
  text-align: center;
  min-height: 20px;
  margin-top: 16px;
}

/* --- App View --- */
#app-view {
  display: flex;
  height: 100%;
  width: 100%;
  position: relative;
  overflow: hidden; /* Contain all child movements */
}

#sidebar {
  width: 350px;
  background-color: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-color);
  box-sizing: border-box;
  padding: 20px;
  flex-shrink: 0;
  z-index: 20;
}

#sidebar-header {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

#sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

#sidebar-logo-placeholder {
  width: 35px;
  height: auto;
}

#sidebar-logo h1 {
  font-size: 20px;
  font-weight: 500;
  margin: 0;
}

#new-session-btn {
  width: 100%;
  border: none;
  background: var(--primary-color);
  color: var(--text-color-inverted);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  font-family: var(--secondary-font);
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 4%;
  margin-bottom: 20px;
  transition: background-color 0.2s;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  padding: 0;
}

#new-session-btn p {
  margin-top: 20px;
}

.plus-icon {
  height: 14px;
  width: 14px;
  margin-right: 10px;
}

#new-session-btn:hover {
  background-color: var(--primary-color-hover);
}

.session-item-container {
  display: flex;
  flex-direction: row;
  align-items: end;
  justify-content: space-between;
  width: 100%;
}

#session-list {
  list-style: none;
  padding: 0;
  margin: 0;
  overflow-y: auto;
  flex-grow: 1;
  /* Custom Scrollbar for Session List */
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

#session-list li {
  border-radius: var(--border-radius-md);
  cursor: pointer;
  margin-bottom: 4px;
  border-left: 3px solid transparent;
  display: flex;
  /* For alignment */
  align-items: flex-start;
  padding: 10px;
}

#session-list li:hover {
  background-color: var(--bg-color);
}

#session-list li.active {
  background-color: var(--input-bg);
  border-left-color: var(--primary-color);
}

li.active .session-name {
  color: var(--text-color);
  font-family: var(--body-font);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 3%;
}

.session-item-content {
  display: flex;
  align-items: flex-start;
  flex-direction: row;
  gap: 12px;
  flex-grow: 1;
  /* Take up available space */
  overflow: hidden;
  /* Prevent content overflow */
}

.chat-icon {
  width: 20px;
  height: 20px;
}

.session-text {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-grow: 1;
  max-width: 180px;
}

.session-name,
.session-name-input {
  font-family: var(--body-font);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 3%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-color);
}

.session-name-input {
  width: 100%;
  background-color: var(--input-bg);
  border: 1px solid var(--primary-color);
  color: var(--text-color);
  padding: 2px 4px;
  border-radius: var(--border-radius-sm);
  font-family: inherit;
  font-size: inherit;
  box-sizing: border-box;
}

.session-name-input:focus {
  outline: none;
}

.session-metadata {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-color-light);
  margin-top: 4px;
}

.session-model {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--secondary-font);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 3%;
}

.session-date {
  flex-shrink: 0;
  white-space: nowrap;
  font-family: var(--secondary-font);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 3%;
}

.session-actions {
  display: flex;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.2s;
  gap: 4px;
  margin-left: 8px;
  /* Space between text and actions */
}

#session-list li:hover .session-actions,
#session-list li.active .session-actions {
  opacity: 1;
}

.session-actions button {
  background: none;
  border: none;
  color: var(--text-color-light);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--border-radius-sm);
  font-size: 1rem;
  line-height: 1;
}

.session-actions button:hover {
  background-color: rgba(139, 158, 166, 0.2);
  color: var(--text-color);
}

.session-actions .delete-btn:hover {
  color: var(--error-color);
  background-color: rgba(229, 115, 115, 0.2);
}

#sidebar-footer {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

/* --- Theme Toggle Switch --- */
.theme-toggle-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 10px 0;
  margin-bottom: 8px;
}

.theme-toggle {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 28px;
}

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

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--input-bg);
  border: 1px solid var(--border-color);
  transition: background-color 0.4s;
  border-radius: 28px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-color-light);
  transition: transform 0.4s, background-color 0.4s;
  border-radius: 50%;
}

/* Checked state = Dark Mode */
input:checked + .slider {
  background-color: var(--primary-color);
}

input:checked + .slider:before {
  transform: translateX(22px);
  background-color: var(--text-color-inverted);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  border-radius: var(--border-radius-md);
  color: var(--text-color-light);
  cursor: pointer;
  text-decoration: none;
  font-weight: 500;
  padding: 1px 10px;
}

.sidebar-link p {
  margin-top: 15px;
  margin-bottom: 10px;
}

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

.sidebar-link-icon {
  width: 20px;
  height: 20px;
}

#chat-container {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--chat-bg);
  height: 100%;
  position: relative;
  z-index: 1;
}

#chat-header {
  display: none;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  background-color: var(--chat-bg);
  z-index: 10;
  height: 60px;
  box-sizing: border-box;
}

#back-to-sessions-btn {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 24px;
  cursor: pointer;
  padding: 8px; /* Increased touch target */
  margin-left: -8px; /* Offset padding */
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

#back-to-sessions-btn:active {
  background-color: var(--subtle-bg);
}

#chat-header-title {
  font-weight: 600;
  font-size: 18px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-grow: 1;
}

#welcome-message {
  flex-grow: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 16px;
}

.plus-icon-blue {
  margin: 0px;
  width: 35px;
  height: 35px;
}

.start-conversation-prompt .plus-icon-box {
  width: 80px;
  height: 80px;
  border: 2px dashed var(--light-blue);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px auto;
}

.start-conversation-prompt h3 {
  font-weight: 500;
  margin: 0 0 8px 0;
  color: var(--text-color);
}

.start-conversation-prompt p {
  margin: 0;
  color: var(--text-color-light);
}

#chat-messages {
  flex-grow: 1;
  overflow-y: auto;
  overflow-x: hidden; /* Strictly disable horizontal scroll at this level */
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  box-sizing: border-box;
  -webkit-overflow-scrolling: touch;
}

.message-bubble {
  max-width: 80%;
  min-width: 0; /* CRITICAL: Allows the bubble to shrink smaller than its content's width */
  padding: 12px 16px;
  border-radius: var(--border-radius-lg);
  line-height: 1.5;
  position: relative;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

@media (max-width: 768px) {
  .message-bubble {
    max-width: 90%; /* Keeps the 90% preference on mobile */
  }
}

.message-bubble.user-message {
  background-color: var(--message-user-bg);
  color: var(--dark);
  align-self: flex-end;
  border-bottom-right-radius: var(--border-radius-sm);
}

.message-bubble.assistant-message {
  background-color: var(--message-assistant-bg);
  align-self: flex-start;
  border: 1px solid var(--border-color);
  border-bottom-left-radius: var(--border-radius-sm);
}

.attachments-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.attachment-item {
  background-color: var(--input-bg);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.9em;
  border: 1px solid var(--text-color);
  color: var(--text-color);
  white-space: nowrap;
}

/* MOD: Replaced old P tag styling with a more robust system for markdown content */
.message-content {
  width: 100%;
  overflow-x: hidden; /* Prevent the content wrapper from drifting */
}

.message-content > *:first-child {
  margin-top: 0;
}

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

.message-content p,
.message-content ul,
.message-content ol,
.message-content pre,
.message-content blockquote {
  margin: 1em 0 0 0;
}

.message-content ul,
.message-content ol {
  padding-left: 1.5em;
}

.message-content blockquote {
  padding-left: 1em;
  margin-left: 0;
  border-left: 3px solid var(--border-color);
  color: var(--text-color-light);
}

.message-content pre {
  background-color: var(--sidebar-bg);
  color: var(--text-color);
  padding: 12px;
  border-radius: var(--border-radius-md);
  overflow-x: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  max-width: 100%;
}

.message-content code {
  font-family: "Courier New", Courier, monospace;
  background-color: var(--sidebar-bg);
  padding: 2px 4px;
  border-radius: var(--border-radius-sm);
  color: var(--text-color);
}

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

.message-content img {
  max-width: 100%;
  border-radius: var(--border-radius-md);
  display: block;
}

.message-content table,
.message-content pre {
  display: block;
  width: 100%;
  max-width: 100%; /* Cannot be wider than the bubble */
  overflow-x: auto; /* Individual elements still scrollable */
  -webkit-overflow-scrolling: touch;
  box-sizing: border-box;
}

/* Ensure table headers and cells look consistent */
.message-content th,
.message-content td {
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  text-align: left;
  min-width: 100px; /* Prevents columns from becoming too squished */
}

.message-content th {
  background-color: var(--subtle-bg);
  font-weight: 600;
}

/* Optional: Add a subtle scrollbar style for tables on desktop */
.message-content table::-webkit-scrollbar {
  height: 6px;
}

.message-content table::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 10px;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--subtle-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color-light);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
  opacity: 0;
  transition: opacity 0.2s, background-color 0.2s;
  z-index: 1;
}

.message-bubble:hover .copy-btn {
  opacity: 1;
}

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

/* --- Code Block Copy Button --- */
.code-block-wrapper {
  position: relative;
  /* This ensures margin calculations relative to other blocks are correct */
  margin: 1em 0 0 0;
}

.message-content > .code-block-wrapper:first-child {
  margin-top: 0;
}

.code-block-wrapper pre {
  /* Reset margin as the wrapper now handles it */
  margin: 0;
}

.code-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--subtle-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color-light);
  cursor: pointer;
  font-size: 12px;
  padding: 4px 8px;
  border-radius: var(--border-radius-sm);
  opacity: 0;
  transition: opacity 0.2s, background-color 0.2s;
  z-index: 1;
  font-family: var(--body-font);
}

.code-block-wrapper:hover .code-copy-btn {
  opacity: 1;
}

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

#message-form-container {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
  background-color: var(--chat-bg);
  /* Handle iPhone X+ safe area */
  padding-bottom: max(16px, env(safe-area-inset-bottom));
}

/* --- Chat Options Bar --- */
#chat-options-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 12px;
}

/* --- Web Search Toggle --- */
#web-search-toggle-container {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  padding-right: 8px;
}

#web-search-toggle-container label[for="web-search-checkbox"] {
  cursor: pointer;
  color: var(--text-color-light);
  transition: color 0.2s;
  user-select: none;
}

#web-search-toggle-container:has(input:checked)
  label[for="web-search-checkbox"] {
  color: var(--text-color-accent);
}

/* --- Reasoning Effort Control --- */
#reasoning-effort-container {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  padding-right: 8px;
}

#reasoning-effort-container .button-text {
  cursor: pointer;
  color: var(--text-color-light);
  user-select: none;
}

#reasoning-effort-select {
  background-color: var(--input-bg);
  color: var(--text-color-light);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 4px 8px;
  font-family: var(--body-font);
  font-size: 14px;
  cursor: pointer;
}

#reasoning-effort-select:focus {
  outline: none;
  border-color: var(--input-border-focus);
}

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

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

.small-toggle .slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--input-bg);
  border: 1px solid var(--border-color);
  transition: background-color 0.4s;
  border-radius: 24px;
}

.small-toggle .slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-color-light);
  transition: transform 0.4s, background-color 0.4s;
  border-radius: 50%;
}

.small-toggle input:checked + .slider {
  background-color: var(--primary-color);
}

.small-toggle input:checked + .slider:before {
  transform: translateX(20px);
  background-color: var(--text-color-inverted);
}

#multimodal-message-form .input-wrapper {
  display: flex;
  gap: 10px;
  background-color: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 8px;
  align-items: flex-end;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#multimodal-message-form .input-wrapper:focus-within {
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 2px rgba(7, 127, 180, 0.3);
}

#multimodal-message-form.drag-over .input-wrapper {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(7, 127, 180, 0.4);
}

#file-staging-area {
  padding: 8px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.file-stage-item {
  background-color: var(--message-assistant-bg);
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 0.9em;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-color);
}

.remove-file-btn {
  background: none;
  border: none;
  color: var(--text-color-light);
  cursor: pointer;
  font-size: 1.2em;
  line-height: 1;
  padding: 0;
}

.remove-file-btn:hover {
  color: var(--error-color);
}

#message-input,
#image-prompt-input,
#multimodal-message-input {
  flex-grow: 1;
  border: none;
  background: transparent;
  color: var(--text-color);
  padding: 8px;
  resize: none;
  min-height: 24px;
  max-height: 200px;
  overflow-y: auto;
}

#message-input:focus,
#image-prompt-input:focus,
#multimodal-message-input:focus {
  outline: none;
}

#attach-file-btn,
#send-btn,
#message-form button[type="submit"],
#multimodal-message-form button[type="submit"] {
  background: transparent;
  border: none;
  color: var(--text-color-light);
  cursor: pointer;
  font-weight: bold;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-md);
  transition: background-color 0.2s, color 0.2s;
}

#attach-file-btn {
  font-size: 1.5rem;
}

#attach-file-btn:hover {
  background-color: rgba(139, 158, 166, 0.2);
  color: var(--text-color);
}

#message-form button[type="submit"],
#multimodal-message-form button[type="submit"] {
  font-size: 1.2rem;
  background-color: var(--primary-color);
  color: var(--text-color-inverted);
}

#message-form button[type="submit"]:hover,
#multimodal-message-form button[type="submit"]:hover {
  background-color: var(--primary-color-hover);
}

#image-message-form,
#message-form {
  display: none;
}

#multimodal-message-form.text-only #attach-file-btn {
  display: none;
}

/* --- Model Selection Modal --- */
#model-selection-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: 16px;
  box-sizing: border-box;
}

.modal-content {
  background: var(--sidebar-bg);
  padding: 20px;
  border-radius: var(--border-radius-lg);
  width: 100%;
  max-width: 500px;
  box-sizing: border-box;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  max-height: 90vh; /* Prevent modal from being taller than screen */
}

.modal-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

.modal-header h2 {
  margin: 0;
}

#modal-close-btn {
  background: none;
  border: none;
  font-size: 1.8rem;
  line-height: 1;
  color: var(--text-color-light);
  cursor: pointer;
  padding: 0;
}

.modal-body {
  padding: 10px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto; /* Enable scrolling for list */
}

.billing-section {
    padding-bottom: 20px;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

#billing-account-select {
    width: 100%;
    margin-top: 10px;
    padding: 12px;
    border-radius: var(--border-radius-md);
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    font-family: var(--body-font);
    font-size: 16px;
    cursor: pointer;
}

#billing-account-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.provider-header {
  display: flex;
  align-items: center;
  flex-direction: row;
  justify-content: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-weight: 600;
  color: var(--text-color);
}

.provider-logo {
  width: 35px;
  height: 35px;
}

.modal-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-buttons button.model-btn {
  padding: 16px;
  font-size: 1em;
  cursor: pointer;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-color);
  color: var(--text-color);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.modal-buttons button.model-btn:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.model-btn p {
  font-weight: 600;
  color: var(--text-color);
  margin: 0;
}

.model-btn .smaller-text {
  color: var(--text-color-light);
  margin: 0;
}

/* --- MOBILE RESPONSIVE STYLES --- */
@media (max-width: 768px) {
  #app-view {
    /* Fix viewport expansion: strictly contain width */
    width: 100%;
    height: 100dvh; /* Dynamic viewport height handles URL bar better */
    position: fixed; /* Lock body scrolling */
    overflow: hidden;
  }

  #sidebar {
    /* Sidebar sits in the background */
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 10;
    border-right: none;
    padding-bottom: env(safe-area-inset-bottom);
  }

  #chat-container {
    /* Chat sits on top but is pushed off-screen initially */
    width: 100%;
    max-width: 100vw;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 20;

    /* FIX: Ensure off-screen content is truly hidden to prevent viewport expansion */
    transform: translateX(100%);
    visibility: hidden;
    overflow: hidden;

    /*
           Transition visibility with a delay so it stays visible while sliding out,
           then hides when done.
        */
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
      visibility 0s linear 0.3s;

    background-color: var(--bg-color); /* Ensure opacity */
  }

  #app-view.show-chat #chat-container {
    transform: translateX(0);
    visibility: visible;
    /* Show immediately when becoming active */
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
      visibility 0s linear 0s;
  }

  /* Optional: Fade sidebar slightly when chat is active for better performance than moving it */
  #app-view.show-chat #sidebar {
    /* We keep it visible underneath or translate it slightly for a parallax effect */
    /* transform: translateX(-20%); */
  }

  #chat-header {
    display: flex;
  }

  #welcome-message {
    display: none;
  }

  #chat-messages {
    padding: 16px;
    /* Ensure bottom padding is enough to scroll past keyboard */
  }

  /* Increase Font Size to preventing zooming on iOS input focus */
  .session-name-input,
  #multimodal-message-input,
  #login-form input {
    font-size: 16px;
  }

  #message-form-container {
    padding: 12px;
    padding-bottom: max(12px, env(safe-area-inset-bottom));
  }

  #chat-options-bar {
    overflow-x: auto;
    padding-bottom: 4px;
    margin-bottom: 8px;
  }

  #chat-options-bar::-webkit-scrollbar {
    display: none;
  }

  .message-bubble {
    max-width: 90%;
  }

  .message-bubble.assistant-message {
    margin-right: 16px;
  }

  .message-bubble.user-message {
    margin-left: 16px;
  }

  .session-actions {
    opacity: 1;
  }

  .session-actions button {
    padding: 12px; /* larger touch target */
  }

  /* --- Mobile Modal (Bottom Sheet Style) --- */
  #model-selection-modal {
    align-items: flex-end; /* Align to bottom */
    padding: 0;
  }

  .modal-content {
    max-width: 100%;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-top-left-radius: 16px;
    border-top-right-radius: 16px;
    max-height: 85vh; /* Allow it to be tall */
    animation: slideUp 0.3s ease-out;
  }

  @keyframes slideUp {
    from {
      transform: translateY(100%);
    }
    to {
      transform: translateY(0);
    }
  }

  .modal-header {
    padding: 16px;
  }

  .modal-body {
    padding: 16px;
    padding-bottom: max(24px, env(safe-area-inset-bottom));
  }
}

/* --- Global Toast Notifications --- */
#toast-container {
    position: fixed;
    top: 20px; /* Positioned at the top */
    right: 20px; /* Default to top-right for desktop */
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: flex-end; /* Align toasts to the right edge */
    gap: 10px;
    pointer-events: none;
}

.toast {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 10px 20px;
    border-radius: var(--border-radius-md);
    font-family: var(--body-font);
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    /* Initial state for the animation */
    transform: translateY(-20px);
    animation: toastIn 0.3s forwards, toastOut 0.3s ease-in 1.2s forwards;
}

/* Mobile: Position top-middle */
@media (max-width: 768px) {
    #toast-container {
        right: auto;
        left: 50%;
        transform: translateX(-50%);
        align-items: center; /* Center the toasts horizontally */
        top: 15px;
    }
}

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

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px); /* Slide back up when disappearing */
    }
}

/* Remove the old local feedback styles */
.code-block-wrapper.copied-flash::after,
.code-block-wrapper.copied-flash pre {
    display: none;
    outline: none;
}

/* --- Model Pricing UI --- */
.model-price-info {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.price-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-color-light);
    font-weight: 700;
}

.price-values {
    font-family: var(--body-font);
    font-size: 12px;
    color: var(--text-color-accent);
    font-weight: 600;
}

/* Adjust button height for content */
.modal-buttons button.model-btn {
    height: auto;
    min-height: 80px;
    justify-content: flex-start;
}

/* Dark theme specific tweak for readability */
html:not(.light-theme) .price-values {
    color: var(--light-blue);
}

/* --- Rendered Grounding Result Styling (Gemini) --- */

.grounding-metadata-container {
    margin-top: 15px;
    border-top: 1px solid var(--border-color);
    padding-top: 10px;
    font-size: 0.9em;
}

/* Target the inline Google styling to allow wrapping of search results */
.grounding-metadata-container .carousel {
    white-space: normal !important;
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 8px !important;
    margin-top: 8px !important;
    overflow: visible !important;
}

.grounding-metadata-container .chip {
    margin: 0 !important;
}

/* Citation tooltip style */
.citation-mark {
  color: var(--text-color-accent);
  text-decoration: none;
  font-size: 0.75em;
  vertical-align: super;
  margin-left: 2px;
  font-weight: 700;
  cursor: pointer;
}

.citation-mark:hover {
  text-decoration: underline;
  color: var(--primary-color);
}
