/* ========================================
   HR Resume Agent - Professional Stylesheet
   ======================================== */

/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
  /* Colors */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-bg: #f8fafc;
  --color-sidebar-bg: #ffffff;
  --color-chat-bg: #f1f5f9;
  --color-user-bubble: #2563eb;
  --color-agent-bubble: #ffffff;
  --color-agent-border: #e2e8f0;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-success: #22c55e;
  --color-warning: #eab308;
  --color-danger: #ef4444;
  --color-pending: #94a3b8;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Border Radius */
  --radius-card: 8px;
  --radius-bubble: 12px;
  --radius-input: 20px;
  
  /* Shadows */
  --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 -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Sidebar */
  --sidebar-width: 320px;
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--color-text);
  background-color: var(--color-bg);
  height: 100vh;
  overflow: hidden;
  line-height: 1.5;
  display: flex;
}

/* ========================================
   Sidebar
   ======================================== */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-agent-border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease-in-out;
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-agent-border);
}

.sidebar-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

/* ========================================
   Upload Section
   ======================================== */
.upload-section {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-agent-border);
}

.drop-zone {
  border: 2px dashed var(--color-agent-border);
  border-radius: var(--radius-card);
  padding: var(--spacing-xl);
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background-color: var(--color-bg);
}

.drop-zone:hover {
  border-color: var(--color-primary);
  background-color: #eff6ff;
}

.drop-zone.dragover {
  border-color: var(--color-primary);
  background-color: #dbeafe;
  transform: scale(1.02);
}

.drop-zone-text {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.drop-zone-subtext {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  margin-top: var(--spacing-xs);
}

.drop-zone-icon {
  display: block;
  margin: 0 auto var(--spacing-sm);
  color: var(--color-primary);
}

.position-tag-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-agent-border);
  border-radius: var(--radius-card);
  font-size: 0.875rem;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  transition: border-color 0.2s ease;
}

.position-tag-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.position-tag-input::placeholder {
  color: var(--color-text-muted);
}

.upload-btn {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-input);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease;
  margin-top: var(--spacing-sm);
}

.upload-btn:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
}

.upload-btn:disabled {
  background-color: var(--color-pending);
  cursor: not-allowed;
  opacity: 0.6;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ========================================
   Resume Section
   ======================================== */
.resume-section {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: var(--spacing-lg);
}

.resume-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.resume-section-header h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.resume-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  padding: 0 var(--spacing-xs);
  background-color: var(--color-primary);
  color: white;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.resume-list {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

.resume-list::-webkit-scrollbar {
  width: 6px;
}

.resume-list::-webkit-scrollbar-track {
  background: transparent;
}

.resume-list::-webkit-scrollbar-thumb {
  background-color: var(--color-agent-border);
  border-radius: 3px;
}

.resume-list::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-pending);
}

.resume-card {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-agent-border);
  transition: background-color 0.2s ease;
  cursor: pointer;
}

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

.resume-card:last-child {
  border-bottom: none;
}

/* ========================================
   Main Chat Area
   ======================================== */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--color-chat-bg);
  overflow: hidden;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  background-color: white;
  border-bottom: 1px solid var(--color-agent-border);
  box-shadow: var(--shadow-sm);
}

.chat-header h2 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
}

.new-chat-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-input);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.new-chat-btn:hover {
  background-color: var(--color-primary);
  color: white;
}

/* ========================================
   Chat Messages
   ======================================== */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
  width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

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

.chat-messages::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-pending);
}

.welcome-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--spacing-xl);
}

.welcome-message p {
  font-size: 0.9375rem;
  max-width: 400px;
}

.message {
  display: flex;
  margin-bottom: var(--spacing-md);
  animation: fadeIn 0.3s ease-in-out;
}

.message.user {
  justify-content: flex-end;
}

.message.assistant {
  justify-content: flex-start;
}

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

/* ========================================
   Tool Indicator & Typing
   ======================================== */
.tool-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.8125rem;
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.typing-indicator {
  display: flex;
  gap: 4px;
  padding: var(--spacing-md);
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background-color: var(--color-pending);
  border-radius: 50%;
  animation: bounce 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(1) {
  animation-delay: 0s;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes bounce {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.7;
  }
  30% {
    transform: translateY(-10px);
    opacity: 1;
  }
}

/* ========================================
   Markdown Content Styling
   ======================================== */
.markdown-content {
  line-height: 1.6;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4 {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--color-text);
}

.markdown-content h1 { font-size: 1.5rem; }
.markdown-content h2 { font-size: 1.25rem; }
.markdown-content h3 { font-size: 1.125rem; }
.markdown-content h4 { font-size: 1rem; }

.markdown-content p {
  margin-bottom: var(--spacing-sm);
}

.markdown-content strong,
.markdown-content b {
  font-weight: 600;
}

.markdown-content em,
.markdown-content i {
  font-style: italic;
}

.markdown-content a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: color 0.2s ease;
}

.markdown-content a:hover {
  color: var(--color-primary-hover);
}

.markdown-content ul,
.markdown-content ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.markdown-content li {
  margin-bottom: 0.25rem;
}

.markdown-content code {
  background-color: #f1f5f9;
  color: #e11d48;
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.875em;
}

.markdown-content pre {
  background-color: #1e293b;
  color: #e2e8f0;
  padding: var(--spacing-md);
  border-radius: var(--radius-card);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

.markdown-content pre code {
  background-color: transparent;
  color: inherit;
  padding: 0;
  font-size: 0.875rem;
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-md);
  font-size: 0.875rem;
}

.markdown-content table th,
.markdown-content table td {
  padding: var(--spacing-sm);
  border: 1px solid var(--color-agent-border);
  text-align: left;
}

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

.markdown-content table tr:nth-child(even) {
  background-color: #f9fafb;
}

.markdown-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-md);
  margin-left: 0;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

.markdown-content hr {
  border: none;
  border-top: 1px solid var(--color-agent-border);
  margin: var(--spacing-lg) 0;
}

/* ========================================
   Chat Input
   ======================================== */
.chat-input-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background-color: white;
  border-top: 1px solid var(--color-agent-border);
  box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.05);
}

.chat-input-bar input,
.chat-input-bar textarea {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 1px solid var(--color-agent-border);
  border-radius: var(--radius-input);
  font-size: 0.9375rem;
  font-family: inherit;
  resize: none;
  transition: border-color 0.2s ease;
  max-height: 120px;
}

.chat-input-bar input:focus,
.chat-input-bar textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.chat-input-bar input::placeholder,
.chat-input-bar textarea::placeholder {
  color: var(--color-text-muted);
}

.send-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
  flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
}

.send-btn:disabled {
  background-color: var(--color-pending);
  cursor: not-allowed;
  opacity: 0.5;
}

/* ========================================
   Mobile Toggle
   ======================================== */
.mobile-toggle {
  display: none;
  position: fixed;
  top: var(--spacing-md);
  left: var(--spacing-md);
  z-index: 1000;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background-color: white;
  border: 1px solid var(--color-agent-border);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  transition: background-color 0.3s ease;
}

.mobile-toggle span::before,
.mobile-toggle span::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 0.3s ease;
}

.mobile-toggle span::before {
  top: -6px;
}

.mobile-toggle span::after {
  bottom: -6px;
}

/* ========================================
   Utility Classes
   ======================================== */
.hidden {
  display: none !important;
}

.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* ========================================
   Responsive Design (Mobile)
   ======================================== */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 999;
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  
  .mobile-toggle {
    display: flex;
  }

  .main-content {
    width: 100%;
  }

  .chat-header {
    padding-left: 60px;
  }

  .bubble {
    max-width: 85%;
  }

  .chat-input-bar {
    padding: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  :root {
    --sidebar-width: 280px;
  }
  
  .sidebar-header h1 {
    font-size: 1.125rem;
  }
  
  .chat-header h2 {
    font-size: 1rem;
  }
  
  .bubble {
    max-width: 90%;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .resume-card {
    padding: var(--spacing-sm);
  }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
  .sidebar,
  .chat-input-bar,
  .chat-header,
  .mobile-toggle {
    display: none;
  }
  
  .main-content {
    width: 100%;
  }

  .bubble {
    max-width: 100%;
  }
}

/* ========================================
   File List (selected files before upload)
   ======================================== */
.file-list {
  margin-top: var(--spacing-sm);
}

.file-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--color-bg);
  border-radius: var(--radius-card);
  margin-bottom: var(--spacing-xs);
  font-size: 0.8125rem;
}

.file-item .file-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-item .file-size {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  flex-shrink: 0;
}

.remove-file-btn {
  background: none;
  border: none;
  color: var(--color-danger);
  cursor: pointer;
  font-size: 0.875rem;
  padding: 0 4px;
  line-height: 1;
}

.remove-file-btn:hover {
  color: #dc2626;
}

.clear-files-btn {
  margin-top: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: transparent;
  border: 1px solid var(--color-agent-border);
  border-radius: var(--radius-card);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.clear-files-btn:hover {
  background-color: var(--color-bg);
  color: var(--color-text);
}

/* ========================================
   Form Elements
   ======================================== */
.form-group {
  margin-top: var(--spacing-sm);
}

.section-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.position-scope-select {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--color-agent-border);
  border-radius: var(--radius-card);
  font-size: 0.8125rem;
  background: white;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.position-scope-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* ========================================
   Model Selector (in chat input bar)
   ======================================== */
.model-selector {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--color-agent-border);
  border-radius: var(--radius-card);
  font-size: 0.8125rem;
  background: white;
  color: var(--color-text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.2s ease;
}

.model-selector:focus {
  outline: none;
  border-color: var(--color-primary);
}

.model-selector:hover {
  border-color: var(--color-primary);
}

/* ========================================
   Chat Bubbles (JS uses .bubble class)
   ======================================== */
.bubble {
  max-width: 75%;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-bubble);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.message.user .bubble {
  background-color: var(--color-user-bubble);
  color: white;
  border-bottom-right-radius: 4px;
  margin-left: auto;
}

.message.assistant .bubble {
  background-color: var(--color-agent-bubble);
  border: 1px solid var(--color-agent-border);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow-sm);
}

.bubble.streaming:empty::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 16px;
  background-color: var(--color-primary);
  animation: blink 1s step-end infinite;
}

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

.error-message {
  color: var(--color-danger);
  font-style: italic;
}

/* ========================================
   Resume Cards (JS-generated)
   ======================================== */
.resume-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.resume-name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text);
  margin: 0;
}

.resume-actions {
  display: flex;
  gap: var(--spacing-xs);
  flex-shrink: 0;
}

.resume-details {
  margin-top: var(--spacing-xs);
}

.resume-filename {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--spacing-xs) 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.position-tag {
  display: inline-block;
  padding: 0.125rem var(--spacing-sm);
  background-color: #dbeafe;
  color: var(--color-primary);
  border-radius: 12px;
  font-size: 0.6875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.resume-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin: 0;
}

.icon-btn {
  background: none;
  border: 1px solid var(--color-agent-border);
  border-radius: var(--radius-card);
  padding: 2px 6px;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--color-text-muted);
  line-height: 1;
}

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

.icon-btn.delete-btn {
  color: var(--color-danger);
  border-color: var(--color-danger);
}

.icon-btn.delete-btn:hover {
  background-color: #fef2f2;
}

.empty-state {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  padding: var(--spacing-lg);
}

/* ========================================
   Welcome Message
   ======================================== */
.welcome-message h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.welcome-message ul {
  text-align: left;
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-lg);
}

.welcome-message li {
  margin-bottom: var(--spacing-xs);
  font-size: 0.9375rem;
}

.welcome-message .tip {
  margin-top: var(--spacing-md);
  font-style: italic;
  font-size: 0.875rem;
}

/* ========================================
   Tool Spinner
   ======================================== */
.tool-spinner {
  display: inline-block;
  animation: spin 1s linear infinite;
}

/* ========================================
   Notifications (Toast)
   ======================================== */
.notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-card);
  font-size: 0.875rem;
  color: white;
  box-shadow: var(--shadow-lg);
  z-index: 10000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
  max-width: 400px;
  white-space: pre-line;
}

.notification.show {
  transform: translateY(0);
  opacity: 1;
}

.notification.info {
  background-color: var(--color-primary);
}

.notification.success {
  background-color: var(--color-success);
}

.notification.error {
  background-color: var(--color-danger);
}

.notification.warning {
  background-color: var(--color-warning);
  color: var(--color-text);
}