/****** DEBoot Advanced Chat UI - styles.css ******/

/*
 * Description: Comprehensive stylesheet for DEBoot, aiming for a professional,
 * modern, and visually appealing interface across landing, chat,
 * and privacy pages. Special focus on enhancing the chat UI and
 * providing best-in-class code block presentation.
 * Version: 3.1 (Refined UI with Transparent Header)
 * Author: Angel-Bohara (Modified for ChatGPT-like UI)
 */

/* ==========================================================================
   1. Root Variables & Base Setup (ChatGPT-like Dark Theme)
   ========================================================================== */

:root {
  /* --- Core Color Palette (ChatGPT-like Dark Theme) --- */
  --primary-bg: #202123; /* Dark background, similar to ChatGPT's main chat area */
  --secondary-bg: #343541; /* Slightly lighter for cards/sections, like message bubbles */
  --tertiary-bg: #444654; /* Even lighter for interactive elements, input fields */

  --accent-primary: #10a37f; /* ChatGPT's green accent for buttons/active states */
  --accent-primary-hover: #0d8a6a; /* Darker green on hover */
  --accent-primary-active: #0a7056; /* Even darker green for active */

  --accent-secondary: #a1a1aa; /* Muted gray for subtle highlights/secondary text */

  --text-primary: #ececf1; /* Off-white for main text */
  --text-secondary: #a1a1aa; /* Muted gray for secondary text, timestamps */
  --text-tertiary: #71717a; /* Darker gray for muted text */

  --border-primary: #444654; /* Darker border for separation */
  --border-secondary: #565869; /* Lighter border for subtle definition */

  --shadow-color-soft: rgba(0, 0, 0, 0.2); /* Subtle shadows */
  --shadow-color-medium: rgba(0, 0, 0, 0.4); /* More pronounced shadows */
  --shadow-color-strong: rgba(0, 0, 0, 0.6); /* Deep shadows */

  --error-color: #ef4444; /* Red for errors */
  --success-color: #22c55e; /* Green for success */
  --warning-color: #facc15; /* Yellow for warnings */

  /* --- Code & Syntax Highlighting (Consistent dark for contrast) --- */
  --code-bg: #2d2d2d; /* Darker grey for code background (Prism Tomorrow Night) */
  --code-text: #f8f8f2; /* Light text */
  --code-header-bg: #3c3c3c; /* Slightly lighter grey for header */
  --code-border: #505050; /* Medium grey border */
  --code-scrollbar-bg: #333333;
  --code-scrollbar-thumb: #666666;
  --code-copy-button-bg: var(--code-header-bg);
  --code-copy-button-hover-bg: #404040;
  --code-copy-button-color: #f8f8f2;
  --code-copy-button-success-color: var(--success-color);

  /* --- Effects & Transitions --- */
  --gradient-accent: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-primary-hover) 100%); /* Adjusted for green */
  --glass-bg: rgba(52, 53, 65, 0.7); /* Darker, less transparent glass effect */
  --backdrop-blur: saturate(150%) blur(8px); /* Slightly less blur */
  --transition-fast: 0.15s ease-out;
  --transition-medium: 0.25s ease-out;
  --transition-slow: 0.4s ease-out;

  /* --- Typography --- */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-secondary: 'Roboto Slab', serif; /* Optional for headings */
  --font-monospace: 'Fira Code', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
  --font-size-base: 16px;
  --line-height-base: 1.65;

  /* --- Sizing & Spacing (Refined for sharper look) --- */
  --spacing-unit: 8px;
  --radius-small: 4px;
  --radius-medium: 6px; /* Sharper */
  --radius-large: 10px; /* Sharper */
  --radius-xl: 18px; /* Sharper input pill */
  --radius-full: 9999px;
  --sidebar-width: 260px;
  --chat-max-width: 960px;
}

/* Apply Fira Code font features if available */
@supports (font-variant-ligatures: common-ligatures) {
  :root {
    --font-monospace: 'Fira Code', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
  }
  code, pre, kbd, samp {
    font-variant-ligatures: common-ligatures; /* Enable programming ligatures */
  }
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--primary-bg);
  color: var(--text-primary);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden; /* Prevent horizontal scrollbar from accidental overflows */
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  text-rendering: optimizeLegibility; /* Improve text rendering on some browsers */
}

/* --- Enhanced Scrollbar Styling (Webkit Browsers) --- */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--primary-bg); /* Match main background */
  border-radius: var(--radius-small);
}
::-webkit-scrollbar-thumb {
  background-color: var(--text-tertiary); /* Muted thumb color */
  border-radius: var(--radius-small);
  border: 2px solid var(--primary-bg); /* Creates padding around thumb */
}
::-webkit-scrollbar-thumb:hover {
  background-color: var(--text-secondary);
}
::-webkit-scrollbar-corner {
  background: transparent;
}
/* Firefox scrollbar styling */
html {
  scrollbar-width: thin;
  scrollbar-color: var(--text-tertiary) var(--primary-bg);
}


/* ==========================================================================
   2. Global Elements & Utilities
   ========================================================================== */

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}
a:hover {
  color: var(--accent-primary-hover);
  text-decoration: underline;
  text-shadow: 0 0 5px rgba(16, 163, 127, 0.3); /* Subtle glow on hover */
}
/* Accessibility: Focus visible for keyboard navigation */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent-primary); /* Use primary accent for focus */
  outline-offset: 2px;
  border-radius: var(--radius-small);
}


h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: calc(var(--spacing-unit) * 2);
  line-height: 1.3;
}
h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.6rem; }
h4 { font-size: 1.3rem; }

p {
  margin-bottom: calc(var(--spacing-unit) * 2);
}

ul, ol {
  padding-left: calc(var(--spacing-unit) * 3);
  margin-bottom: calc(var(--spacing-unit) * 2);
}
li {
  margin-bottom: var(--spacing-unit);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

.new-badge {
  background-color: var(--accent-secondary);
  color: var(--primary-bg);
  padding: 2px 8px;
  border-radius: var(--radius-small);
  font-size: 0.75rem;
  font-weight: 600;
  margin-left: var(--spacing-unit);
  vertical-align: middle;
  display: inline-block;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.section-padding {
    padding: calc(var(--spacing-unit) * 8) calc(var(--spacing-unit) * 5);
}

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 2);
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-primary-hover)); /* Green gradient */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 800px;
    margin: 0 auto calc(var(--spacing-unit) * 6);
    line-height: 1.7;
}

/* ==========================================================================
   3. Sidebar Navigation
   ========================================================================== */

.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--secondary-bg); /* Solid background, less glass effect */
  padding: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 2.5);
  position: fixed;
  top: 0;
  left: 0;
  transform: translateX(0);
  transition: transform var(--transition-medium), width var(--transition-medium), box-shadow var(--transition-medium);
  z-index: 1000;
  border-right: 1px solid var(--border-primary);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  box-shadow: var(--shadow-color-strong) 2px 0 10px;
}

.sidebar.closed {
  transform: translateX(-100%);
}

.sidebar h2 {
  font-size: 1.8rem; /* Smaller, more subtle logo */
  margin-bottom: calc(var(--spacing-unit) * 4);
  color: var(--text-primary); /* White text for logo */
  font-weight: 700;
  text-align: left; /* Align left */
  letter-spacing: 0; /* Remove letter spacing */
  text-shadow: none; /* Remove glow */
}

.sidebar nav {
  flex-grow: 1;
}

.sidebar a {
  display: flex;
  align-items: center;
  color: var(--text-secondary);
  text-decoration: none;
  padding: calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 2); /* Slightly less padding */
  margin: calc(var(--spacing-unit) * 0.5) 0;
  border-radius: var(--radius-medium);
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  font-size: 0.95rem; /* Slightly smaller link text */
  font-weight: 400; /* Lighter font weight */
}

.sidebar a i {
  margin-right: calc(var(--spacing-unit) * 1.5);
  font-size: 1.1rem; /* Slightly smaller icon */
  width: 24px;
  text-align: center;
  transition: color var(--transition-fast);
  color: var(--text-tertiary);
}

.sidebar a:hover {
  background-color: var(--tertiary-bg); /* Lighter background on hover */
  color: var(--text-primary);
  transform: translateX(5px); /* Less pronounced slide effect */
  text-decoration: none;
  box-shadow: none; /* Remove shadow on hover */
}
.sidebar a:hover i {
  color: var(--text-primary); /* Icon color matches text on hover */
}

.sidebar a.active {
  background: var(--tertiary-bg); /* Solid background for active state */
  color: var(--text-primary); /* White text on dark background */
  font-weight: 600;
  box-shadow: none; /* Remove shadow */
}
.sidebar a.active i {
  color: var(--text-primary);
}

/* Optional: Add a divider */
.sidebar hr {
  border: none;
  height: 1px;
  background-color: var(--border-primary);
  margin: calc(var(--spacing-unit) * 2) 0;
}

/* ==========================================================================
   4. Page Container & Main Layout
   ========================================================================== */

.page-container {
  margin-left: var(--sidebar-width);
  transition: margin-left var(--transition-medium);
  width: calc(100% - var(--sidebar-width));
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-container.full-width {
  margin-left: 0;
  width: 100%;
}

/* --- MODIFIED: General Header (Used in Chat & Privacy) --- */
header:not(.landing-header) {
  display: flex;
  align-items: center;
  justify-content: space-between; /* Key for centering with spacers */
  padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2.5);
  background-color: rgba(32, 33, 35, 0.75); /* Transparent background */
  backdrop-filter: blur(12px); /* Glassmorphism effect */
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(86, 88, 105, 0.4); /* Subtle transparent border */
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
  z-index: 900;
  min-height: 56px; /* A bit more vertical space */
  transition: left var(--transition-medium), width var(--transition-medium);
  box-shadow: none;
}

/* NEW: Spacer for header to help center content */
.header-spacer {
    width: 40px; /* Approx width of the toggle button */
    flex-shrink: 0;
}

/* Adjust header when sidebar is closed */
.page-container.full-width header:not(.landing-header) {
  left: 0;
  width: 100%;
}

/* --- General Footer (Used in Landing & Privacy) --- */
footer.landing-footer {
  text-align: center;
  padding: calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 2);
  margin-top: auto;
  color: var(--text-secondary);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-primary);
  background-color: var(--secondary-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-unit);
  box-shadow: none; /* Remove footer shadow */
}
.landing-footer .footer-links {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
}
.landing-footer .footer-links a {
    color: var(--text-secondary);
    font-weight: 500;
}
.landing-footer .footer-links a:hover {
    color: var(--accent-primary);
}


/* ==========================================================================
   5. Landing Page Specific Styles (index.html)
   ========================================================================== */

body.landing-page {
  display: flex;
  flex-direction: column;
}

.landing-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 5);
  background: var(--primary-bg); /* Solid background */
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 1px solid var(--border-primary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: none; /* Remove header shadow */
}

.landing-header .logo {
  font-size: 1.8rem; /* Smaller logo */
  font-weight: 700;
  color: var(--text-primary); /* White text for logo */
  text-shadow: none;
}

.landing-header nav {
  display: flex;
  gap: calc(var(--spacing-unit) * 3);
}

.landing-header nav a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-unit) 0;
  position: relative;
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}
.landing-header nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-primary);
  transition: width var(--transition-medium);
}
.landing-header nav a:hover,
.landing-header nav a.active {
  color: var(--text-primary);
  text-decoration: none;
  text-shadow: none;
}
.landing-header nav a:hover::after {
  width: 100%;
}
.landing-header nav a i {
  margin-right: calc(var(--spacing-unit) * 0.75);
}

.landing-hero {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--spacing-unit) * 10) calc(var(--spacing-unit) * 3);
  min-height: 85vh;
  position: relative;
  overflow: hidden;
  background: var(--primary-bg); /* Solid background for hero */
}

.hero-content-wrapper {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 900px;
    padding: calc(var(--spacing-unit) * 3);
}

.hero-tagline {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: calc(var(--spacing-unit) * 2.5);
    text-shadow: none;
}

.landing-hero h1 {
  font-size: 4.5rem;
  font-weight: 900;
  margin-bottom: calc(var(--spacing-unit) * 3);
  color: var(--text-primary);
  line-height: 1.1;
  text-shadow: none;
}

.hero-description {
  font-size: 1.4rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin-bottom: calc(var(--spacing-unit) * 5);
  line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: calc(var(--spacing-unit) * 4);
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.cta-btn {
  padding: calc(var(--spacing-unit) * 1.75) calc(var(--spacing-unit) * 5);
  border-radius: var(--radius-small); /* Sharper corners */
  font-size: 1.15rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  transition: transform var(--transition-fast), box-shadow var(--transition-medium), background-color var(--transition-medium);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-unit) * 1.5;
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
}
.cta-btn i {
    transition: transform var(--transition-fast);
}

.primary-btn {
    background: var(--accent-primary); /* Solid green */
    color: #ffffff;
    box-shadow: 0 8px 15px rgba(16, 163, 127, 0.3); /* Green shadow */
    text-shadow: none;
}

.primary-btn:hover {
  transform: translateY(-3px); /* Less pronounced lift */
  box-shadow: 0 10px 20px rgba(16, 163, 127, 0.4);
  text-decoration: none;
  background-color: var(--accent-primary-hover);
}
.primary-btn:hover i {
    transform: translateX(3px); /* Icon slides on hover */
}

.secondary-btn {
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
    box-shadow: none;
}

.secondary-btn:hover {
    background: rgba(16, 163, 127, 0.1); /* Subtle background on hover */
    color: var(--accent-primary-hover);
    transform: translateY(-3px);
    box-shadow: none;
    text-decoration: none;
    border-color: var(--accent-primary-hover);
}
.secondary-btn:hover i {
    transform: scale(1.05); /* Icon slightly scales */
}

/* New: Styling for the group of counters */
.counters-group {
    display: flex;
    gap: calc(var(--spacing-unit) * 3);
    flex-wrap: wrap;
    justify-content: center;
    margin-top: calc(var(--spacing-unit) * 4);
}

.user-counter,
.server-utilization-counter {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    background-color: var(--tertiary-bg);
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    border-radius: var(--radius-small); /* Sharper corners */
    display: inline-flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1);
    border: 1px solid var(--border-primary);
    box-shadow: none; /* Remove shadow */
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.user-counter:hover,
.server-utilization-counter:hover {
    transform: translateY(-2px);
    box-shadow: none;
}
.user-counter i, .server-utilization-counter i {
    color: var(--accent-primary);
    font-size: 1.1rem;
}


/* Lazy Load Sections - Enhanced */
.lazy-load-section {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    will-change: opacity, transform;
}

.lazy-load-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}


#features {
  background-color: var(--primary-bg); /* Match main background */
  text-align: center;
  padding-bottom: calc(var(--spacing-unit) * 8);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: calc(var(--spacing-unit) * 5);
  max-width: 1200px;
  margin: 0 auto;
}

.feature-item {
  background-color: var(--secondary-bg); /* Lighter background for items */
  padding: calc(var(--spacing-unit) * 4);
  border-radius: var(--radius-medium); /* Slightly less rounded */
  border: 1px solid var(--border-primary);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium);
  box-shadow: none; /* Remove shadow */
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.feature-item:hover {
  transform: translateY(-5px); /* Less pronounced lift */
  box-shadow: 0 5px 15px rgba(0,0,0,0.3); /* Subtle shadow on hover */
}

.feature-icon {
    width: 60px; /* Slightly smaller icons */
    height: 60px;
    background: var(--tertiary-bg); /* Muted background for icons */
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: calc(var(--spacing-unit) * 3);
    box-shadow: none; /* Remove shadow */
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    position: relative;
    perspective: 1000px;
    overflow: hidden;
}
.feature-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.05); /* Very subtle highlight */
    border-radius: inherit;
    opacity: 0;
    transition: opacity 0.3s ease;
    transform: translateZ(0); /* No 3D transform */
    box-shadow: none; /* Remove inner glow */
}
.feature-icon:hover::before {
    opacity: 1;
}

.feature-icon:hover {
    transform: translateY(-3px); /* Less pronounced lift */
    box-shadow: none;
}
.feature-icon i {
  font-size: 2.2rem; /* Slightly smaller icon size */
  color: var(--accent-primary); /* Green icon */
  margin: 0;
  text-shadow: none;
  transition: text-shadow var(--transition-fast);
}

.feature-item h3 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: calc(var(--spacing-unit) * 1.5);
}
.feature-item p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 0;
}

.alt-bg {
    background-color: var(--primary-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 5);
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.about-item {
    background-color: var(--secondary-bg);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: var(--radius-medium);
    border: 1px solid var(--border-primary);
    box-shadow: none; /* Remove shadow */
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    perspective: 1000px;
}
.about-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}
.about-item i {
    font-size: 2.5rem; /* Slightly smaller icons */
    color: var(--accent-primary);
    margin-bottom: calc(var(--spacing-unit) * 3);
    transition: color var(--transition-fast);
    text-shadow: none;
}
.about-item:hover i {
    color: var(--accent-primary-hover);
}
.about-item h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}
.about-item p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 0;
}


/* ==========================================================================
   6. Privacy Policy Page Specific Styles (privacy.html)
   ========================================================================== */

.privacy-policy {
  max-width: var(--chat-max-width);
  margin: calc(var(--spacing-unit) * 4) auto;
  padding: calc(var(--spacing-unit) * 4);
  background-color: var(--secondary-bg);
  border-radius: var(--radius-medium);
  border: 1px solid var(--border-primary);
  box-shadow: none;
}

/* MODIFIED: Make the H2 the main page title */
.privacy-policy h2:first-of-type {
  text-align: center;
  margin-bottom: calc(var(--spacing-unit) * 4);
  font-size: 2.5rem;
  color: var(--text-primary);
  padding-bottom: calc(var(--spacing-unit) * 2);
  border-bottom: 1px solid var(--border-primary);
}

.privacy-policy p strong {
  font-weight: 600;
  color: var(--text-primary);
}

.privacy-policy section {
  margin-bottom: calc(var(--spacing-unit) * 4);
  padding-bottom: calc(var(--spacing-unit) * 3);
  border-bottom: 1px solid var(--border-primary);
}
.privacy-policy section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.privacy-policy h3 {
  font-size: 1.5rem;
  margin-bottom: calc(var(--spacing-unit) * 2);
  color: var(--accent-primary);
}

.privacy-policy ul {
  list-style: disc;
  padding-left: calc(var(--spacing-unit) * 4);
}

.privacy-policy a {
  font-weight: 500;
}

/* ==========================================================================
   7. Chat Page Specific Styles (chat.html)
   ========================================================================== */

.chat-container {
  width: 100%;
  max-width: 100%;
  margin: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  background-color: var(--primary-bg);
  flex-grow: 1;
}

#mainChatSection {
  padding-top: 56px; /* Match new header height */
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden; /* Prevents container from showing scrollbars */
}

/* --- Chat Header Controls --- */
.controls-container {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 2);
}

/* MODIFIED: Model Select Refinement */
.model-toggle select {
  padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 3) calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
  background-color: var(--tertiary-bg);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-medium);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 500;
  min-width: 150px;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23a1a1aa' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.8rem center;
  background-size: 0.7em;
}

.model-toggle select:hover {
  border-color: var(--accent-primary);
  background-color: var(--tertiary-bg);
  box-shadow: none;
}

.model-toggle select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.4); /* Green focus ring */
}

/* --- Chatbox Area --- */
#chatbox {
  background: var(--primary-bg);
  padding: calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 3);
  flex-grow: 1;
  overflow-y: auto;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* --- START: Empty Chat Placeholder Styles --- */
.empty-chat-placeholder {
    position: absolute;
    top: 45%; /* Position slightly above center */
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-tertiary);
    opacity: 1;
    pointer-events: none;
    transition: opacity 0.3s ease-out;
    width: 100%;
}

#chatbox.has-messages .empty-chat-placeholder {
    opacity: 0;
}

.placeholder-logo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 2rem;
    background-color: var(--tertiary-bg);
    color: var(--text-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
    border: 2px solid var(--border-primary);
}

.empty-chat-placeholder h2 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-tertiary);
    margin: 0;
}
/* --- END: Empty Chat Placeholder Styles --- */


/* --- Message Bubbles --- */
.message {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin: calc(var(--spacing-unit) * 1.25) auto; /* Centered with auto margins */
  max-width: 768px; /* Max width for chat bubbles */
  width: 100%; /* Ensure it takes full width up to max */
  opacity: 0;
  transform: translateY(20px);
  animation: messageFadeIn 0.5s ease-out forwards;
  position: relative; /* Ensure messages render above the absolute placeholder */
  z-index: 1;
}

@keyframes messageFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message.user {
  align-self: flex-end; /* User messages align right */
  align-items: flex-end;
}

.message.bot {
  align-self: flex-start; /* Bot messages align left */
}

.message .message-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-unit);
  margin-bottom: calc(var(--spacing-unit) * 0.75);
  color: var(--text-secondary); /* Header text muted */
  font-size: 0.85rem;
}

.message.user .message-header {
  flex-direction: row-reverse; /* Avatar on right for user */
}

.avatar {
  width: 32px; /* Smaller avatar */
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1rem;
  flex-shrink: 0;
  background-color: var(--tertiary-bg); /* Muted background */
  color: var(--text-primary); /* White text */
  border: none; /* No border */
  box-shadow: none; /* No shadow */
}

.message.user .avatar {
  background: var(--accent-primary); /* Green for user avatar */
  color: #ffffff;
}
.message.bot .avatar {
  background: var(--tertiary-bg); /* Muted background for bot avatar */
  color: var(--text-primary);
}

.message-content {
  padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2); /* Standard padding */
  border-radius: var(--radius-medium); /* Consistent border radius */
  position: relative;
  transition: background-color var(--transition-fast);
  width: auto; /* Content-based width */
  max-width: 100%;
  font-size: 1rem;
  line-height: 1.7;
  overflow-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
  box-shadow: none; /* Remove shadows from bubbles */
}


.message.user .message-content {
  background: var(--accent-primary); /* Solid green for user messages */
  color: #ffffff;
  border-bottom-right-radius: var(--radius-small); /* Pointed corner */
}

.message.bot .message-content {
  background: var(--secondary-bg); /* Darker background for bot messages */
  color: var(--text-primary);
  border: none; /* No border */
  border-bottom-left-radius: var(--radius-small); /* Pointed corner */
}

.message.error .message-content {
  background: var(--error-color);
  color: #ffffff;
  border-color: #ef4444;
  box-shadow: none;
}

.message-content p {
  margin: calc(var(--spacing-unit) * 0.75) 0;
}
.message-content p:first-child { margin-top: 0; }
.message-content p:last-child { margin-bottom: 0; }

/* --- Markdown & Content Styling within Messages --- */
.message-content h1, .message-content h2, .message-content h3,
.message-content h4, .message-content h5, .message-content h6 {
  margin: calc(var(--spacing-unit) * 2) 0 var(--spacing-unit);
  font-weight: 600;
  line-height: 1.4;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border-primary);
}
.message-content h1 { font-size: 1.5em; }
.message-content h2 { font-size: 1.35em; }
.message-content h3 { font-size: 1.2em; border-bottom: none; }
.message-content strong { font-weight: 700; color: inherit; }
.message-content em { font-style: italic; color: inherit; }
.message-content code:not(pre code) { /* Inline code */
  background-color: rgba(255, 255, 255, 0.1); /* Light, transparent background for inline code */
  color: var(--text-primary);
  padding: 0.25em 0.6em;
  border-radius: var(--radius-small);
  font-family: var(--font-monospace);
  font-size: 0.9em;
  vertical-align: middle;
  box-shadow: none;
}
.message-content ul, .message-content ol {
  padding-left: calc(var(--spacing-unit) * 3);
  margin: var(--spacing-unit) 0;
}
.message-content li::marker {
    color: var(--text-secondary);
}
.message-content blockquote {
  border-left: 4px solid var(--accent-primary); /* Thinner green border */
  padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
  margin: calc(var(--spacing-unit) * 1.5) 0;
  color: var(--text-secondary);
  font-style: italic;
  background-color: var(--tertiary-bg); /* Muted background */
  border-radius: var(--radius-medium);
  box-shadow: none;
}
.message-content hr {
    border: none;
    height: 1px;
    background-color: var(--border-primary);
    margin: calc(var(--spacing-unit) * 2.5) 0;
}
.message-content table {
    width: 100%;
    max-width: 100%;
    border-collapse: collapse;
    margin: calc(var(--spacing-unit) * 2.5) 0;
    font-size: 0.9em;
    border: 1px solid var(--border-secondary);
    display: block;
    overflow-x: auto;
    border-radius: var(--radius-small);
    box-shadow: none;
}
.message-content th, .message-content td {
    border: 1px solid var(--border-primary);
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
    text-align: left;
    white-space: normal;
}
.message-content th {
    background-color: var(--tertiary-bg);
    font-weight: 600;
    color: var(--text-primary);
}
.message-content tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.05); /* Very subtle darker background for even rows */
}

/* --- MathJax Container Styling --- */
.mjx-container {
  display: block !important;
  max-width: 100% !important;
  overflow-x: auto !important;
  overflow-y: hidden !important;
  margin: calc(var(--spacing-unit) * 1.5) 0 !important;
  padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2) !important;
  background-color: var(--tertiary-bg) !important;
  border-radius: var(--radius-small) !important;
  border: 1px solid var(--border-primary) !important;
  box-shadow: none;
  color: var(--text-primary) !important;
  line-height: normal;
  -webkit-overflow-scrolling: touch;
  svg text {
    fill: var(--text-primary) !important;
  }
}
.mjx-container > mjx-assistive-mml,
.mjx-container > svg {
  max-width: none !important;
  width: auto !important;
}
.mjx-chtml[display="inline"] {
  display: inline-block;
  vertical-align: middle;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* === START: ENHANCED INPUT AREA STYLES === */

/* Main wrapper: centered on desktop, docked on mobile. */
.input-container-wrapper {
    width: 100%;
    max-width: var(--chat-max-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-unit);
    flex-shrink: 0;
}

/* The "pill" bar for the input */
.input-area {
    display: flex;
    align-items: flex-end; /* Align to bottom for growing textarea */
    gap: var(--spacing-unit);
    padding: var(--spacing-unit);
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-xl);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25); /* Refined shadow */
    transition: border-color var(--transition-fast), box-shadow var(--transition-medium);
}

.input-area:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.3), 0 2px 10px rgba(0, 0, 0, 0.25);
}

/* Shared style for circular action buttons (upload, search) */
.input-action-btn {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    margin-bottom: 4px; /* Align with textarea baseline */
}

.input-action-btn:hover {
    background-color: var(--tertiary-bg);
    color: var(--text-primary);
}

/* Active state for the search button */
#searchToggleBtn.active-search {
    background-color: var(--accent-primary);
    color: white;
}
#searchToggleBtn.active-search:hover {
    background-color: var(--accent-primary-hover);
}

/* Main textarea styling */
.input-area textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    resize: none;
    min-height: 24px;
    max-height: 200px;
    font-size: 1rem;
    line-height: 1.5;
    padding: 8px 4px;
    scrollbar-width: thin;
    scrollbar-color: var(--code-scrollbar-thumb) var(--code-scrollbar-bg);
}

.input-area textarea::placeholder {
    color: var(--text-tertiary);
}

.input-area textarea::-webkit-scrollbar { width: 8px; }
.input-area textarea::-webkit-scrollbar-track { background: transparent; }
.input-area textarea::-webkit-scrollbar-thumb { background-color: var(--code-scrollbar-thumb); border-radius: var(--radius-small); }

/* Send Button styling */
.send-btn {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--tertiary-bg); /* Default "disabled" state */
    color: var(--text-tertiary);
    font-size: 1.1rem;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    margin-bottom: 4px; /* Align with textarea baseline */
    cursor: not-allowed;
}

/* Active state for send button (toggled by JS) */
.send-btn.active {
    background-color: var(--accent-primary);
    color: white;
    cursor: pointer;
}
.send-btn.active:hover {
    background-color: var(--accent-primary-hover);
}

/* Image Preview Container (appears above input) */
.image-preview-container {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-unit);
    background-color: var(--secondary-bg);
    padding: var(--spacing-unit);
    border-radius: var(--radius-medium);
    border: 1px solid var(--border-secondary);
    width: fit-content;
    margin-left: var(--spacing-unit);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

#imagePreview {
    max-width: 80px;
    max-height: 80px;
    object-fit: cover;
    border-radius: var(--radius-small);
}

#removeImageBtn {
    background: var(--tertiary-bg);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1rem;
}
#removeImageBtn:hover {
    background-color: var(--error-color);
    color: white;
}

/* Footer text below the input bar */
.input-footer {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    padding: 0 calc(var(--spacing-unit) * 2);
}

/* Chat message with an uploaded image */
.chat-uploaded-image {
    max-width: 250px;
    height: auto;
    border-radius: var(--radius-small);
    margin-bottom: 12px;
    border: 1px solid var(--border-primary);
    box-shadow: none;
}
/* === END: ENHANCED INPUT AREA STYLES === */


/* ==========================================================================
   8. Enhanced Code Block Styling
   ========================================================================== */
.code-block-container.enhanced-code {
  background-color: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-medium);
  margin: calc(var(--spacing-unit) * 2) 0;
  overflow: hidden;
  box-shadow: none;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--code-header-bg);
  padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 1.5);
  border-bottom: 1px solid var(--code-border);
}

.language-label {
  font-family: var(--font-monospace);
  font-size: 0.85rem;
  color: var(--code-text);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.code-controls button {
  background: transparent;
  color: var(--code-copy-button-color);
  border-radius: var(--radius-small);
  padding: calc(var(--spacing-unit) * 0.75);
  font-size: 1.1rem;
  line-height: 1;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.code-controls button:hover {
  background-color: rgba(255, 255, 255, 0.1); /* Subtle hover for controls */
  color: var(--accent-primary);
  transform: translateY(-1px);
}
.code-controls button:active {
    transform: translateY(0);
}

.code-wrapper {
  overflow: hidden;
  transition: max-height var(--transition-medium) ease-out;
}

.code-wrapper pre,
.code-wrapper pre[class*="language-"] {
  margin: 0 !important;
  padding: 0 !important;
  border-radius: 0 !important;
  border: none !important;
  background: transparent !important;
  box-shadow: none !important;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.code-wrapper code[class*="language-"] {
  display: block;
  padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 2.5);
  font-family: var(--font-monospace);
  font-size: 0.95em;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: break-word;
  
  scrollbar-width: thin;
  scrollbar-color: var(--code-scrollbar-thumb) var(--code-scrollbar-bg);
}

.code-wrapper code[class*="language-"]::-webkit-scrollbar {
  height: 8px;
  width: 8px;
}
.code-wrapper code[class*="language-"]::-webkit-scrollbar-track {
  background: var(--code-scrollbar-bg);
  border-radius: var(--radius-small);
}
.code-wrapper code[class*="language-"]::-webkit-scrollbar-thumb {
  background-color: var(--code-scrollbar-thumb);
  border-radius: var(--radius-small);
}

/* PrismJS Theme Overrides (Adjusted for better integration with palette) */
/* These colors are from the Dracula theme for better contrast on dark code blocks */
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: #6272A4; }
.token.punctuation { color: #F8F8F2; }
.token.namespace { opacity: .7; }
.token.property, .token.tag, .token.boolean, .token.number, .token.constant, .token.symbol, .token.deleted { color: #BD93F9; }
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted { color: #50FA7B; }
.token.operator, .token.entity, .token.url, .language-css .token.string, .style .token.string { color: #FF79C6; background: none; }
.token.atrule, .token.attr-value, .token.keyword { color: #FF79C6; }
.token.function, .token.class-name { color: #F1FA8C; }
.token.regex, .token.important, .token.variable { color: #FFB86C; }
.token.important, .token.bold { font-weight: bold; }
.token.italic { font-style: italic; }


/* ==========================================================================
   9. Responsive Design & Media Queries
   ========================================================================== */

@media (max-width: 1024px) {
  :root {
    --sidebar-width: 240px;
    --chat-max-width: 90%;
  }
  .page-container {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
  }
  .landing-header nav {
    gap: calc(var(--spacing-unit) * 2);
  }
  .landing-hero h1 { font-size: 3.8rem; }
  .hero-description { font-size: 1.25rem; }
  .section-title { font-size: 2.5rem; }
  .section-subtitle { font-size: 1.15rem; }

  .cta-btn {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 4);
    font-size: 1.05rem;
  }
  .feature-icon { width: 55px; height: 55px; } /* Smaller icons */
  .feature-icon i { font-size: 2rem; }
  .about-item i { font-size: 2.2rem; }
}

@media (max-width: 768px) {
  :root {
    --font-size-base: 15px;
  }
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
    box-shadow: 5px 0 20px rgba(0,0,0,0.4);
  }
  .sidebar.closed {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-toggle {
    display: block;
  }

  header:not(.landing-header) {
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    left: 0;
    width: 100%;
    min-height: 52px;
  }

  .controls-container {
    gap: calc(var(--spacing-unit) * 1.5);
  }
  .model-toggle select {
    min-width: 110px;
    font-size: 0.8rem;
    padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 2.5) calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 1);
    background-position: right 0.5rem center;
    background-size: 0.6em;
  }

  #chatbox {
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 2);
    padding-bottom: var(--spacing-unit); 
  }
  .message {
    max-width: 95%;
  }

  /* DOCKED INPUT FOR MOBILE */
  .input-container-wrapper {
      max-width: 100%;
      padding: var(--spacing-unit);
      background-color: var(--primary-bg); /* Give it a background when docked */
      border-top: 1px solid var(--border-primary);
  }
  .input-area {
      box-shadow: none; /* No shadow when docked */
  }

  .landing-header {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
  }
  .landing-header .logo { font-size: 1.8rem; }
  .landing-header nav {
      display: none;
  }
  .landing-hero h1 { font-size: 3.2rem; }
  .hero-description { font-size: 1.1rem; }
  .hero-tagline { font-size: 0.95rem; }
  .cta-btn { font-size: 1rem; padding: calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 3); }
  .hero-actions {
      flex-direction: column;
      gap: calc(var(--spacing-unit) * 2);
  }

  .counters-group {
      flex-direction: column;
      gap: calc(var(--spacing-unit) * 1.5);
  }

  .section-padding {
    padding: calc(var(--spacing-unit) * 5) calc(var(--spacing-unit) * 2);
  }
  .section-title {
    font-size: 2.2rem;
  }
  .section-subtitle {
    font-size: 1.05rem;
    margin-bottom: calc(var(--spacing-unit) * 4);
  }

  .feature-grid, .about-grid {
    grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 3);
  }

  .privacy-policy {
    padding: calc(var(--spacing-unit) * 2);
    margin: calc(var(--spacing-unit) * 2) auto;
  }
}

/* ==========================================================================
   10. Animations & Effects
   ========================================================================== */
.placeholder {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

/* Rocket Typing Indicator - Adjusted for subtle animation */
.typing-indicator {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    width: 40px; /* Smaller width */
    height: 20px;
    position: relative;
    overflow: hidden;
    margin-left: 10px;
}

.typing-indicator::before {
    content: "\f111"; /* Font Awesome circle icon for typing dots */
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    font-size: 0.8rem; /* Smaller dots */
    color: var(--text-secondary); /* Muted color */
    position: absolute;
    left: 0;
    opacity: 0;
    animation: dotFade 1.5s infinite ease-in-out; /* Simpler animation */
    text-shadow: none;
    will-change: opacity;
}

.typing-indicator::after {
    content: "\f111"; /* Second dot */
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    font-size: 0.8rem;
    color: var(--text-secondary);
    position: absolute;
    left: 15px; /* Offset for second dot */
    opacity: 0;
    animation: dotFade 1.5s infinite ease-in-out 0.2s; /* Staggered animation */
    text-shadow: none;
    will-change: opacity;
    z-index: -1;
}

.typing-indicator span { /* Third dot */
    content: "\f111";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    font-size: 0.8rem;
    color: var(--text-secondary);
    position: absolute;
    left: 30px; /* Offset for third dot */
    opacity: 0;
    animation: dotFade 1.5s infinite ease-in-out 0.4s; /* Staggered animation */
    text-shadow: none;
    will-change: opacity;
}

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


/* ==========================================================================
   End of Stylesheet
   ========================================================================== */

/* Custom Modal/Notification Styles */
.custom-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.custom-modal {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-medium);
    padding: calc(var(--spacing-unit) * 3);
    max-width: 400px;
    width: 90%;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.7);
    transform: translateY(-20px);
    transition: transform 0.3s ease;
    text-align: center;
}

.custom-modal-overlay.show .custom-modal {
    transform: translateY(0);
}

.custom-modal h3 {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.custom-modal p {
    color: var(--text-primary);
    margin-bottom: calc(var(--spacing-unit) * 3);
    line-height: 1.6;
}

.custom-modal-buttons {
    display: flex;
    justify-content: center;
    gap: calc(var(--spacing-unit) * 2);
}

.custom-modal-buttons button {
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 3);
    border-radius: var(--radius-small);
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.custom-modal-buttons .confirm-btn {
    background: var(--accent-primary);
    color: white;
    box-shadow: none;
}

.custom-modal-buttons .confirm-btn:hover {
    transform: translateY(-2px);
    box-shadow: none;
}

.custom-modal-buttons .cancel-btn {
    background-color: var(--tertiary-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-primary);
    box-shadow: none;
}

.custom-modal-buttons .cancel-btn:hover {
    background-color: var(--border-secondary);
    transform: translateY(-2px);
    box-shadow: none;
}

/* Specific styles for notification (non-confirm) */
.custom-notification {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-small);
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    position: fixed;
    bottom: calc(var(--spacing-unit) * 3);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    opacity: 0;
    visibility: hidden;
    z-index: 1500;
    min-width: 250px;
    max-width: 90%;
    box-shadow: none;
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 1.5);
    transition: transform 0.4s ease-out, opacity 0.4s ease-out, visibility 0.4s ease-out;
}

.custom-notification.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}

.custom-notification.success {
    border-left: 5px solid var(--success-color);
}
.custom-notification.error {
    border-left: 5px solid var(--error-color);
}
.custom-notification.info {
    border-left: 5px solid var(--accent-primary);
}

.custom-notification i {
    font-size: 1.5rem;
}
.custom-notification.success i { color: var(--success-color); }
.custom-notification.error i { color: var(--error-color); }
.custom-notification.info i { color: var(--accent-primary); }

.custom-notification p {
    margin: 0;
    font-size: 1rem;
    color: var(--text-primary);
    flex-grow: 1;
}

/* Adjustments for sidebar elements for delete button */
.sidebar #recentChatsList a {
    position: relative;
    padding-right: calc(var(--spacing-unit) * 5);
}

.delete-chat-btn {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 0.9rem;
    padding: 5px;
    border-radius: 50%;
    position: absolute;
    right: calc(var(--spacing-unit));
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity 0.2s ease, color 0.2s ease, background-color 0.2s ease;
    cursor: pointer;
}

.sidebar #recentChatsList a:hover .delete-chat-btn,
.delete-chat-btn:focus-visible {
    opacity: 1;
    color: var(--error-color);
    background-color: rgba(239, 68, 68, 0.1);
}

.delete-chat-btn:hover {
    color: #ef4444;
    background-color: rgba(239, 68, 68, 0.2);
}