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

/* =============================
   Global Reset & Base
   ============================= */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: 'Poppins', sans-serif;
}

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

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes subtleGlow {
  0% { box-shadow: 0 0 0px rgba(130,170,255,0.0); }
  50% { box-shadow: 0 0 16px rgba(130,170,255,0.25); }
  100% { box-shadow: 0 0 0px rgba(130,170,255,0.0); }
}

/* =============================
   Theme Variables
   ============================= */
:root {
  --background-gradient-start: #d0eaff;
  --background-gradient-end: #b3d8f7;
  --background-color: #f6fbff;

  --glass-bg: rgba(255,255,255,0.35);
  --glass-bg-strong: rgba(255,255,255,0.5);
  --glass-border: rgba(255,255,255,0.22);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.10);
  --shadow-md: 0 6px 20px rgba(0,0,0,.08);

  --sidebar-background-color: rgba(241,243,246,0.65);
  --text-color: #222;
  --muted-text: #5f6b7a;

  --user-bg-color: #dcf8c6;
  --assistant-bg-color: #a7d7f9;
  --container-bg-color: rgba(255,255,255,0.6);

  --toggle-bg-color: #d1d9e6;
  --toggle-hover-color: #b8c6dc;
  --dropdown-bg-color: #b7dcf7;
  --highlighted-code-bg-color: #f0f8ff;

  --input-text-color: #333;
  --input-background-color: rgba(255,255,255,0.75);
  --input-border-color: #d1d9e6;
  --input-focus-border-color: #82aaff;

  --btn-primary-color: #82aaff;
  --btn-primary-hover-color: #628efb;
  --btn-secondary-color: #ff8a80;
  --btn-secondary-hover-color: #ff5252;

  --accent: #82aaff;
  --accent-2: #50bcf2;
}

body.night-mode {
  --background-gradient-start: #151515;
  --background-gradient-end: #212121;
  --background-color: #000000;

  --glass-bg: rgba(0,0,0,0.35);
  --glass-bg-strong: rgba(0,0,0,0.5);
  --glass-border: rgba(255,255,255,0.12);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.45);
  --shadow-md: 0 8px 24px rgba(0,0,0,.35);

  --sidebar-background-color: rgba(45,44,44,0.6);
  --text-color: #f5f5f5;
  --muted-text: #b9c0cc;

  --user-bg-color: #2f2f2f;
  --assistant-bg-color: #0b77ff;
  --container-bg-color: rgba(12,12,12,0.6);

  --toggle-bg-color: #4c4c4c;
  --toggle-hover-color: #666;
  --dropdown-bg-color: rgba(40,40,40,0.85);
  --highlighted-code-bg-color: rgb(18,146,251);

  --input-text-color: #fff;
  --input-background-color: rgba(22,22,22,0.55);
  --input-border-color: #444;
  --input-focus-border-color: #0b77ff;

  --btn-primary-color: #5aa55a;
  --btn-primary-hover-color: #499449;
  --btn-secondary-color: #d66767;
  --btn-secondary-hover-color: #c25656;

  --accent: #0b77ff;
  --accent-2: #50bcf2;
}

/* =============================
   Body & Background
   ============================= */
body {
  transition: background-color 0.5s, color 0.5s;
  background: linear-gradient(135deg, var(--background-gradient-start), var(--background-gradient-end));
  background-size: 220% 220%;
  animation: gradientShift 18s ease infinite;
  color: var(--text-color);
}

#particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: -1;
  inset: 0;
}

/* =============================
   Theme Switcher
   ============================= */
.theme-switcher {
  position: relative;
}
.theme-switcher input[type="checkbox"] {
  display: none;
}
.slider {
  position: relative;
  width: 60px;
  height: 30px;
  background-color: #ccc;
  border-radius: 30px;
  transition: background-color 0.5s, transform .2s;
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px) saturate(140%);
}
.slider::before {
  content: '';
  position: absolute;
  width: 26px;
  height: 26px;
  background-color: white;
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform 0.35s cubic-bezier(.2,.85,.25,1);
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
}
.slider::after {
  content: '🌞';
  position: absolute;
  left: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  transition: color 0.5s, left .3s, right .3s;
}
input[type="checkbox"]:checked + .slider {
  background-color: #333;
}
input[type="checkbox"]:checked + .slider::before {
  transform: translateX(30px);
}
input[type="checkbox"]:checked + .slider::after {
  content: '🌜';
  left: auto;
  right: 6px;
  color: white;
}

/* =============================
   Layout
   ============================= */
.container {
  display: flex;
  height: 100%;
  width: 100vw;
  overflow: hidden;
  gap: 18px;
  padding: 12px;
}

.menu-icon {
  display: none;
  font-size: 30px;
  padding: 10px;
  cursor: pointer;
  color: var(--text-color);
  position: fixed;
  left: 10px;
  top: 10px;
  z-index: 1100;
  border-radius: 10px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px) saturate(150%);
  box-shadow: var(--shadow-md);
  transition: transform .15s ease, box-shadow .2s ease;
}
.menu-icon:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(0,0,0,.14);
}

/* =============================
   Sidebar + Brand
   ============================= */
.sidebar {
  flex: 0 0 300px;
  min-width: 300px;
  max-width: 300px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  padding: 18px;
  overflow: auto;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px) saturate(140%);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  padding: 10px 8px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255,255,255,.32), rgba(255,255,255,.12));
  border: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 5;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
}
body.night-mode .brand {
  background: linear-gradient(135deg, rgba(12,12,12,.55), rgba(35,35,35,.35));
}
.brand-logo img {
  display: block;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0,0,0,.18);
}
.brand-text .brand-title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .3px;
  color: var(--text-color);
}
.brand-text .brand-subtitle {
  font-size: 12px;
  color: var(--muted-text);
}

/* Sidebar Lists */
.sidebar ul {
  list-style: none;
  padding: 0;
}
.sidebar li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(174,174,174,.35);
  font-size: 15px;
  color: var(--text-color);
}

/* Model Picker */
.model-picker {
  display: flex;
  justify-content: center;
  z-index: 1000;
  margin-bottom: 10px;
}
.dropdown {
  position: relative;
  width: 100%;
}
.dropdown button {
  background: linear-gradient(180deg, var(--toggle-bg-color), rgba(255,255,255,.2));
  color: var(--text-color);
  border: 1px solid var(--glass-border);
  padding: 10px 15px;
  font-size: 16px;
  cursor: pointer;
  border-radius: 10px;
  outline: none;
  width: 100%;
  backdrop-filter: blur(8px) saturate(130%);
  transition: transform .12s ease, box-shadow .2s ease, background .3s ease;
  box-shadow: var(--shadow-md);
}
.dropdown button:hover {
  background: var(--toggle-hover-color);
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(0,0,0,.12);
}
.dropdown-content {
  display: none;
  position: absolute;
  background: var(--dropdown-bg-color);
  min-width: 260px; /* Increased width */
  border-radius: 12px;
  overflow: hidden;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1001;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px) saturate(150%);
}
.dropdown-content div {
  color: var(--text-color);
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  transition: background-color 0.25s ease, transform .05s ease;
}
.dropdown-content div:hover {
  background-color: var(--toggle-hover-color);
}
/* Removed hover logic, now handled by JS */

/* New Chat */
#new-chat {
  background: linear-gradient(135deg, var(--btn-primary-color), var(--accent-2));
  color: white;
  padding: 12px 16px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  outline: none;
  transition: transform 0.2s, box-shadow 0.2s, filter .2s;
  font-weight: 600;
  letter-spacing: .2px;
  box-shadow: 0 10px 22px rgba(80,188,242,.35);
}
#new-chat:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(80,188,242,.45);
  filter: saturate(110%);
}
#new-chat:active {
  transform: scale(0.98);
}

/* Session list scroll */
#session-list {
  max-height: 250px;
  overflow-y: auto;
  list-style: none;
  padding: 0;
  margin: 10px 0;
}

/* =============================
   Main Chat Area
   ============================= */
.chatGPT-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--container-bg-color);
  border: 1px solid var(--glass-border);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px) saturate(140%);
  padding: 8px;
}

/* Header controls (theme + language) */
.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  position: fixed;
  top: 8px;
  right: 12px;
  z-index: 1002;
  flex-direction: row-reverse;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 6px 8px;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px) saturate(130%);
}
.language-dropdown {
  position: relative;
  z-index: 1002;
}
.language-button {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-color);
  cursor: pointer;
  padding: 4px 8px;
  outline: none;
  border-radius: 8px;
}
.language-button:hover {
  background: rgba(255,255,255,.15);
}
.header-controls > * {
  display: flex;
  align-items: center;
}

/* Language dropdown menu */
.language-dropdown .dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--dropdown-bg-color);
  border-radius: 10px;
  min-width: 160px;
  padding: 5px 0;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(8px);
}
.language-dropdown.active .dropdown-content {
  display: block;
}
.language-dropdown .dropdown-content a {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  color: var(--text-color);
  text-decoration: none;
  transition: background-color 0.2s ease;
}
.language-dropdown .dropdown-content a:hover {
  background-color: var(--toggle-hover-color);
}

/* Color helpers for language letters */
.red { color: red; }
.yellow { color: #FFC107; }
.black { color: black; }
.white { color: white; }
.blue { color: blue; }
.green { color: green; }
.dropdown-content a span {
  font-weight: bold;
}

/* Messages */
.messages {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  overflow-x: hidden;
  word-wrap: break-word;
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  scroll-behavior: smooth;
}

/* Chat Bubbles */
.user, .assistant {
  max-width: 100%;
  padding: 12px 18px;
  border-radius: 16px;
  color: var(--text-color);
  margin-bottom: 4px;
  word-break: break-word;
  animation: fadeIn 0.5s ease;
  box-shadow: var(--shadow-md);
  position: relative;
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(6px) saturate(130%);
}
.user {
  align-self: flex-end;
  background: var(--user-bg-color);
  border-bottom-right-radius: 6px;
  margin-top: 30px;
}
.assistant {
  align-self: flex-start;
  background: var(--assistant-bg-color);
  border-bottom-left-radius: 6px;
}

.assistant.loading {
  height: 35px; /* Final height adjustment */
  min-height: 35px;
  padding: 0 18px; /* Restore horizontal padding, keep vertical at 0 */
  display: flex;
  align-items: center;
  justify-content: flex-start; /* Align to the left for a more natural look */
}

.assistant.loading .message-content {
  padding: 0;
  display: flex;
  align-items: center;
  width: auto; /* Allow content to determine width */
}

/* Message container with action buttons */
.message-container {
  position: relative;
  border-radius: 12px;
  padding-bottom: 30px; /* Add space for buttons */
}

.message-actions {
  position: absolute;
  bottom: 5px;
  right: 5px;
  display: flex;
  gap: 5px;
  opacity: 0; /* Initially hidden */
  transition: opacity 0.2s ease-in-out;
}

.message-container:hover .message-actions {
  opacity: 1; /* Show on hover */
}

.play-btn, .stop-btn, .copy-btn {
  padding: 4px 8px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  box-shadow: 0 2px 8px rgba(80,188,242,.15);
  transition: background .15s, box-shadow .15s;
}

.play-btn:hover, .stop-btn:hover, .copy-btn:hover {
  background: var(--accent-2);
  box-shadow: 0 4px 12px rgba(80,188,242,.25);
}

.typing-indicator {
  display: flex;
  align-items: center;
}
.typing-indicator .dot {
  width: 8px;
  height: 8px;
  margin: 0 2px;
  background-color: #555;
  border-radius: 50%;
  animation: blink 1.4s infinite both;
}
.typing-indicator .dot:nth-child(1) { animation-delay: 0s; }
.typing-indicator .dot:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator .dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink {
  0%, 80%, 100% { opacity: 0; }
  40% { opacity: 1; }
}

/* Highlighted code block */
.highlighted-code-container {
  position: relative;
  display: block;
  margin: 10px 0;
  padding: 10px 8px 10px 10px;
  background-color: var(--highlighted-code-bg-color);
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
}
.highlighted-code {
  display: block;
  word-wrap: break-word;
  color: #0a0a0a;
}
.copy-button {
  position: absolute;
  top: 6px;
  right: 6px;
  cursor: pointer;
  background-color: rgba(240,240,240,.9);
  border: 1px solid #ccc;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 11px;
  opacity: 0.85;
  transition: opacity 0.2s ease;
  z-index: 1;
}
.copy-button:hover {
  opacity: 1;
}

/* Input Area */
.input-area {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(12px) saturate(140%);
}
#user-input {
  flex-grow: 1;
  padding: 12px 12px;
  background-color: var(--input-background-color);
  border: 1px solid var(--input-border-color);
  color: var(--input-text-color);
  font-size: 16px;
  transition: all 0.25s ease;
  border-radius: 12px;
  min-height: 50px;
  max-height: 180px;
  overflow-y: auto;
  outline: none;
}
#user-input:focus {
  transform: translateY(-1px);
  border-color: var(--input-focus-border-color);
  box-shadow: 0 0 0 4px rgba(130,170,255,.15);
}
#user-input[contenteditable=true]:empty:before {
  content: attr(data-placeholder);
  pointer-events: none;
  display: block;
  color: #888;
}
.attach-btn, .send-btn {
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  border: none;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  padding: 10px 14px;
  border-radius: 12px;
  box-shadow: 0 10px 22px rgba(80,188,242,.35);
  transition: transform .12s ease, box-shadow .2s ease, filter .2s ease;
}
.attach-btn:hover, .send-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(80,188,242,.45);
  filter: saturate(110%);
}

/* Help/Onboarding message */
.GPT-chatly-message {
  position: absolute;
  top: 50%;
  left: 60%;
  transform: translate(-50%, -50%);
  font-size: 18px;
  color: var(--text-color);
  text-align: center;
  width: 60%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px) saturate(140%);
}
.GPT-chatly-message h1, 
.GPT-chatly-message h2 {
  margin: 0;
  padding: 0;
}
@media (max-width: 768px) {
  .GPT-chatly-message {
    font-size: 0;
  }
  .GPT-chatly-message::after {
    content: "SerqAI - Deep Researcher powered by Chat GPT";
    font-size: 16px;
    color: var(--text-color);
  }
}

/* FAQ Floating Button */
.faq-button {
  position: fixed;
  bottom: 20px;
  left: 20px;
  position: sticky;
  top: 90%;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  border: none;
  font-size: 24px;
  cursor: pointer;
  box-shadow: 0 16px 30px rgba(80,188,242,.35);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .12s ease, box-shadow .2s ease;
  z-index: 1002;
}
.faq-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 40px rgba(80,188,242,.45);
}
.faq-button:active {
  transform: translateY(1px) scale(.98);
}
#faq {
  display: none;
}
.faq-question {
  color: var(--text-color);
  cursor: pointer;
  padding: 10px;
  border-bottom: 1px solid rgba(210,210,210,.55);
}
.faq-answer {
  color: var(--text-color);
  display: none;
  padding: 10px 10px 10px 18px;
}
.chat-gpt-faq {
  background-color: var(--container-bg-color);
  padding: 16px;
  border-radius: 14px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px);
}

/* Image display container */
#image-display-container {
  position: relative;
  display: none;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  margin: 12px auto;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  padding: 10px;
  backdrop-filter: blur(10px) saturate(140%);
}
#close-image-display {
  color: var(--text-color);
  background: rgba(255,255,255,0.6);
  border-radius: 50%;
  padding: 5px 10px;
  cursor: pointer;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
}
#download-image-button {
  display: flex;
  justify-content: start;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border: none;
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 100;
  border-radius: 10px;
  padding: 6px 10px;
  box-shadow: 0 10px 22px rgba(80,188,242,.35);
}

/* Anchors */
a {
  color: inherit;
  text-decoration: none;
}
a:hover,
a:active,
a:visited {
  color: inherit;
  text-decoration: underline;
}

/* Loader */
.loader {
  border: 16px solid #f3f3f3;
  border-radius: 50%;
  border-top: 16px solid #3498db;
  width: 120px;
  height: 120px;
  animation: spin 2s linear infinite;
}
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Responsive Sidebar for Mobile */
.model-picker-mobile {
  display: none;
}

@media (max-width: 768px) {
  .model-picker-mobile {
    display: block;
    width: 90%;
    margin: 0 auto 10px;
  }
  .sidebar .model-picker {
    display: none;
  }
  .brand {
    display: none;
  }
  .sidebar {
    width: 80%;
    position: fixed;
    left: -100%;
    top: 0;
    height: 100%;
    transition: left 0.3s ease;
    z-index: 1099;
  }
  .menu-icon {
    display: block;
  }
  #new-chat {
    margin-top: 60px;
  }
  .dropdown { text-align: center; width: auto; }
  .dropdown-content {
    left: 50%;
    transform: translateX(-50%);
  }
  #faq-toggle { display: none; }
}

/* =============================
   Custom Scrollbars
   ============================= */
.messages::-webkit-scrollbar,
.sidebar::-webkit-scrollbar,
#session-list::-webkit-scrollbar,
#user-input::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
.messages::-webkit-scrollbar-track,
.sidebar::-webkit-scrollbar-track,
#session-list::-webkit-scrollbar-track,
#user-input::-webkit-scrollbar-track {
  background: transparent;
}
.messages::-webkit-scrollbar-thumb,
.sidebar::-webkit-scrollbar-thumb,
#session-list::-webkit-scrollbar-thumb,
#user-input::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  border-radius: 10px;
  border: 2px solid transparent;
}
.messages, .sidebar, #session-list, #user-input {
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
}

/* =============================
   Existing classes kept intact
   (for JS compatibility)
   ============================= */
.toggle-btn {
  background-color: var(--toggle-bg-color);
  color: var(--text-color);
  border: none;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 16px;
}

/* Keep previous definitions if used elsewhere */
.messages { width: 90%; }

/* Ensure video widget text stands out */
#remaining-tokens {
  color: var(--muted-text);
  font-size: 14px;
  margin-top: 6px;
}

/* Session list title ellipsis */
.session-title {
  display: inline-block;
  max-width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: middle;
}