@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Inter:wght@400;500;600&display=swap');

:root {
  /* Color Palette */
  --bg-base: #0B0E14;
  --bg-surface: rgba(22, 27, 34, 0.6);
  --bg-surface-hover: rgba(35, 42, 53, 0.8);
  --bg-input: rgba(10, 12, 16, 0.7);
  --primary: #6366F1;
  --primary-glow: rgba(99, 102, 241, 0.4);
  --secondary: #A855F7;
  --accent: #10B981;
  --text-main: #F3F4F6;
  --text-muted: #9CA3AF;
  --border-color: rgba(255, 255, 255, 0.08);
  
  /* Layout & Glassmorphism */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --blur-md: backdrop-filter: blur(12px);
  --blur-lg: backdrop-filter: blur(24px);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Animations */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 30%, rgba(168, 85, 247, 0.08) 0%, transparent 40%);
  background-attachment: fixed;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: -0.02em;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--secondary);
}

/* Glass Surface Utility */
.glass-panel {
  background: var(--bg-surface);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  outline: none;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--primary-glow);
  filter: brightness(1.1);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Inputs */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.input-group label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-field {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-fast);
  width: 100%;
}

.input-field:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

/* App Layout */
.app-container {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: rgba(10, 12, 16, 0.6);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--border-color);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  z-index: 10;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  background: linear-gradient(to right, #fff, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
}

.nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.nav-item.active {
  background: rgba(99, 102, 241, 0.1);
  color: var(--primary);
  border-left: 3px solid var(--primary);
}

/* Main Content Area */
.main-content {
  padding: 2rem 3rem;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
}

.page-header {
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Dashboard Grid (Admin) */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-title {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--text-main);
}

/* Upload Area */
.upload-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 3rem 2rem;
  text-align: center;
  transition: all var(--transition-fast);
  background: rgba(0, 0, 0, 0.2);
  cursor: pointer;
  margin-bottom: 2rem;
}

.upload-area:hover, .upload-area.dragover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.05);
}

.upload-icon {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

/* Popup / Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: var(--bg-base);
  width: 100%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  padding: 2rem;
  transform: translateY(20px) scale(0.95);
  transition: transform var(--transition-normal);
  border: 1px solid var(--border-color);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-overlay.active .modal-content {
  transform: translateY(0) scale(1);
}

.metadata-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tag {
  background: rgba(255, 255, 255, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.tag:hover, .tag.selected {
  background: var(--primary);
  color: white;
}

/* Chat Interface Specifics */
.chat-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  scroll-behavior: smooth;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

.message {
  display: flex;
  gap: 1rem;
  max-width: 85%;
  animation: slideUp 0.3s ease forwards;
  opacity: 0;
  transform: translateY(10px);
}

.message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.message.assistant {
  align-self: flex-start;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.user .avatar {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
}

.assistant .avatar {
  background: var(--bg-surface-hover);
  border: 1px solid var(--border-color);
  color: var(--accent);
}

.message-bubble {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.message-bubble.audit-json {
  font-family: ui-monospace, "Cascadia Code", "Segoe UI Mono", monospace;
  font-size: 0.82rem;
}

.user .message-bubble {
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.3);
  border-bottom-right-radius: 4px;
}

.assistant .message-bubble {
  border-bottom-left-radius: 4px;
}

.chat-input-area {
  margin-top: auto;
  padding-top: 1.5rem;
  position: relative;
}

.chat-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.chat-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem 4rem 1.25rem 1.5rem;
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-fast);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  resize: none;
  overflow: hidden;
  height: 60px;
}

.chat-input.has-attach {
  padding-left: 3.75rem;
}

.chat-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-glow), 0 10px 30px rgba(0, 0, 0, 0.3);
}

.attach-btn {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 2;
}

.attach-btn:hover:not(:disabled) {
  color: var(--text-main);
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.12);
}

.attach-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.send-btn {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.send-btn:hover {
  background: var(--secondary);
  transform: translateY(-50%) scale(1.05);
}

.send-btn:disabled {
  background: var(--bg-surface-hover);
  color: var(--text-muted);
  cursor: not-allowed;
  transform: translateY(-50%);
}

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

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 0.3rem;
  padding: 0.5rem;
}

.typing-dot {
  width: 6px;
  height: 6px;
  background: var(--text-muted);
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

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

/* Project Selector Dropdown */
.project-selector {
  width: 100%;
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  appearance: none;
  font-family: var(--font-body);
  cursor: pointer;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239CA3AF' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1em;
}

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