/* ============================================
   CRITICAL SIDEBAR FIXES
   ============================================ */

/* Base styles */
:root {
  --primary: #20808d;
  --primary-dark: #1a6b77;
  --bg-primary: #ffffff;
  --bg-secondary: #f7f8f8;
  --bg-tertiary: #eff0f0;
  --text-primary: #202222;
  --text-secondary: #687076;
  --text-tertiary: #9ca3af;
  --border: #e5e7eb;
  --shadow: rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-secondary);
  color: var(--text-primary);
  overflow-x: hidden;
  position: relative;
}

/* SIDEBAR - FIXED POSITIONING */
.sidebar {
  position: fixed !important;
  top: 0 !important;
  left: -320px !important; /* Hidden by default */
  width: 300px !important;
  height: 100vh !important;
  background: var(--bg-primary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 2000 !important;
  transition: left 0.3s ease;
  overflow-y: auto;
  box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar.open {
  left: 0 !important;
}

/* SIDEBAR OVERLAY */
.sidebar-overlay {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1500 !important;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  pointer-events: none;
}

.sidebar-overlay.show {
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto;
}

/* HEADER - STAYS IN PLACE */
.perplexity-header {
  position: sticky !important;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000 !important;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

/* MAIN CONTAINER - NEVER SHIFTS */
.main-container {
  position: relative;
  min-height: calc(100vh - 240px);
  padding: 40px 20px 160px;
  margin-left: 0 !important;
  width: 100%;
  transition: none; /* No transition to prevent shifting */
}

/* INPUT AREA - STAYS AT BOTTOM */
.input-area {
  position: fixed !important;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, var(--bg-secondary) 70%, transparent);
  padding: 20px 20px 30px;
  z-index: 100 !important;
}

/* ============================================
   SIDEBAR CONTENT
   ============================================ */

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-close {
  display: block;
}

.sidebar-nav {
  flex: 1;
  padding: 20px 0;
  overflow-y: auto;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 15px;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.sidebar-item:hover {
  background: var(--bg-secondary);
  border-left-color: var(--primary);
}

.sidebar-item svg {
  color: var(--text-secondary);
  flex-shrink: 0;
}

.sidebar-item:hover svg {
  color: var(--primary);
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-sidebar-primary,
.btn-sidebar-secondary {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-sidebar-primary {
  background: var(--primary);
  color: white;
}

.btn-sidebar-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(32, 128, 141, 0.3);
}

.btn-sidebar-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-sidebar-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--primary);
}

/* ============================================
   COMMON ELEMENTS
   ============================================ */

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.logo svg {
  color: var(--primary);
}

.logo-text {
  font-weight: 500;
}

.btn-icon, .action-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s;
}

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

.btn-header {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-header:hover {
  background: var(--bg-secondary);
  border-color: var(--primary);
}

/* ============================================
   WELCOME SCREEN
   ============================================ */

.welcome-screen {
  padding: 80px 20px;
}

.welcome-icon svg {
  color: var(--primary);
  filter: drop-shadow(0 4px 12px rgba(32, 128, 141, 0.2));
}

.welcome-title {
  font-size: 48px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.welcome-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
}

.suggested-queries {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px;
  max-width: 800px;
  margin: 0 auto;
}

.suggested-query {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s;
}

.suggested-query:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 12px var(--shadow);
  transform: translateY(-2px);
}

.sq-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.sq-text {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}

/* ============================================
   CHAT MESSAGES
   ============================================ */

.chat-messages {
  display: none;
  margin-bottom: 40px;
}

.chat-messages.visible {
  display: block;
}

.message {
  margin-bottom: 32px;
  animation: fadeIn 0.4s ease;
}

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

.message.user .message-content {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 16px;
  color: var(--text-primary);
  line-height: 1.6;
}

.message.assistant {
  background: var(--bg-primary);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--border);
}

.message-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.assistant-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--bg-secondary);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
}

.assistant-badge svg {
  color: var(--primary);
}

.message-content {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
}

.message-content img {
  max-width: 300px;
  border-radius: 8px;
  margin: 12px 0;
  border: 1px solid var(--border);
}

/* Sources Section */
.sources-section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.sources-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.sources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}

.source-card {
  display: flex;
  flex-direction: column;
  padding: 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s;
}

.source-card:hover {
  border-color: var(--primary);
  box-shadow: 0 2px 8px var(--shadow);
  transform: translateY(-1px);
}

.source-number {
  font-size: 11px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 4px;
}

.source-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-domain {
  font-size: 12px;
  color: var(--text-tertiary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Related Questions */
.related-section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.related-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.related-questions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-question {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
  color: var(--text-primary);
}

.related-question:hover {
  border-color: var(--primary);
  background: var(--bg-primary);
}

.related-question svg {
  color: var(--text-tertiary);
  flex-shrink: 0;
}

/* Message Actions */
.message-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.message-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.message-action-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--primary);
  color: var(--primary);
}

/* Thinking Indicator */
.thinking-indicator {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: 12px;
  margin-top: 16px;
}

.thinking-dots {
  display: flex;
  gap: 4px;
}

.thinking-dot {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out;
}

.thinking-dot:nth-child(1) {
  animation-delay: -0.32s;
}

.thinking-dot:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes bounce {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

.thinking-text {
  font-size: 14px;
  color: var(--text-secondary);
  font-style: italic;
}

/* ============================================
   INPUT COMPONENTS
   ============================================ */

.focus-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.focus-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

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

.focus-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.search-box {
  position: relative;
  background: var(--bg-primary);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 12px 16px;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  transition: all 0.2s;
  box-shadow: 0 2px 12px var(--shadow);
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 4px 20px rgba(32, 128, 141, 0.15);
}

.search-textarea {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: 15px;
  color: var(--text-primary);
  resize: none;
  max-height: 200px;
  font-family: inherit;
  line-height: 1.5;
}

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

.search-actions {
  display: flex;
  gap: 4px;
  align-items: center;
}

.send-btn {
  background: var(--primary) !important;
  color: white !important;
}

.send-btn:hover {
  background: var(--primary-dark) !important;
}

.send-btn:disabled {
  background: var(--border) !important;
  color: var(--text-tertiary) !important;
  cursor: not-allowed;
}

/* Image Preview */
.image-preview {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 2px 8px var(--shadow);
}

.image-preview img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.image-preview-info {
  flex: 1;
  min-width: 0;
}

.image-preview-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.image-preview-size {
  font-size: 12px;
  color: var(--text-tertiary);
}

.image-preview-remove {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 20px;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.2s;
  flex-shrink: 0;
}

.image-preview-remove:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.input-footer {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* Error Messages */
.error-message {
  background: #fee2e2 !important;
  border: 1px solid #fca5a5 !important;
  color: #dc2626 !important;
}

.error-icon {
  color: #dc2626;
  margin-right: 8px;
}

/* Share Modal */
.share-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.share-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
  color: var(--text-primary);
}

.share-option:hover {
  background: var(--bg-primary);
  border-color: var(--primary);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 991px) {
  .welcome-title {
    font-size: 40px;
  }
}

@media (max-width: 768px) {
  .welcome-title {
    font-size: 32px;
  }

  .welcome-subtitle {
    font-size: 16px;
  }

  .suggested-queries {
    grid-template-columns: 1fr;
  }

  .sources-grid {
    grid-template-columns: 1fr;
  }

  .share-options {
    grid-template-columns: 1fr;
  }

  .focus-selector {
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .focus-selector::-webkit-scrollbar {
    display: none;
  }

  .sidebar {
    width: 280px !important;
    left: -280px !important;
  }

  .header-actions .btn-header span {
    display: none;
  }

  .header-actions .btn-header {
    padding: 8px;
    width: 36px;
    justify-content: center;
  }

  .message.assistant {
    padding: 18px;
  }

  .main-container {
    padding: 30px 15px 160px;
  }
}

@media (max-width: 576px) {
  .welcome-title {
    font-size: 28px;
  }

  .welcome-screen {
    padding: 60px 15px;
  }

  .sidebar {
    width: 100% !important;
    left: -100% !important;
  }

  .message.assistant {
    padding: 16px;
  }

  .input-area {
    padding: 15px 15px 20px;
  }

  .message-actions {
    flex-direction: column;
  }

  .message-action-btn {
    width: 100%;
    justify-content: center;
  }
}

/* ============================================
   DARK MODE
   ============================================ */

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1a1b1e;
    --bg-secondary: #0f1011;
    --bg-tertiary: #2a2b2e;
    --text-primary: #ececed;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    --border: #2a2b2e;
    --shadow: rgba(0, 0, 0, 0.3);
  }

  .perplexity-header {
    background: rgba(26, 27, 30, 0.95);
  }

  .sidebar-overlay {
    background: rgba(0, 0, 0, 0.7);
  }
}

/* ============================================
   SCROLLBARS
   ============================================ */

html {
  scroll-behavior: smooth;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

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

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

.back-to-home-btn {
    position: fixed;
    top: 80px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    color: #374151;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 1002;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.back-to-home-btn:hover {
    background: #6366f1;
    color: white;
    border-color: #6366f1;
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.back-to-home-btn svg {
    width: 20px;
    height: 20px;
}

@media (max-width: 768px) {
    .back-to-home-btn {
        top: 70px;
        right: 15px;
        padding: 10px 16px;
        font-size: 13px;
    }
    
    .back-to-home-btn svg {
        width: 18px;
        height: 18px;
    }
}

@media (max-width: 480px) {
    .back-to-home-btn {
        top: 60px;
        right: 10px;
        padding: 8px 12px;
        font-size: 12px;
    }
    
    .back-to-home-btn span {
        display: none;
    }
    
    .back-to-home-btn svg {
        width: 20px;
        height: 20px;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .sidebar,
  .sidebar-overlay,
  .perplexity-header,
  .input-area,
  .message-actions {
    display: none;
  }

  .main-container {
    padding: 20px;
  }
}