/* ========================================
   AI STATION - PERPLEXITY STYLE UI
   ======================================== */

/* === ROOT VARIABLES === */
:root {
  /* Palette principale (blu professionale) */
  --primary-color: #6366F1;
  --primary-hover: #4F46E5;
  --primary-light: #818CF8;
  
  /* Background dark mode */
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --bg-tertiary: #334155;
  
  /* Text colors */
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  /* Accent colors */
  --accent-green: #10B981;
  --accent-red: #EF4444;
  --accent-yellow: #F59E0B;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

/* === BODY & LAYOUT === */
body {
  background: var(--bg-primary) !important;
  color: var(--text-primary) !important;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === HEADER === */
#app-header {
  background: var(--bg-secondary) !important;
  border-bottom: 1px solid var(--bg-tertiary) !important;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

/* Logo styling */
#app-header img[alt="logo"] {
  border-radius: var(--radius-md);
  transition: transform 0.2s ease;
}

#app-header img[alt="logo"]:hover {
  transform: scale(1.05);
}

/* === SIDEBAR === */
#chat-history-sidebar {
  background: var(--bg-secondary) !important;
  border-right: 1px solid var(--bg-tertiary) !important;
}

/* Thread items in sidebar */
.thread-item {
  border-radius: var(--radius-md) !important;
  margin: 0.25rem 0.5rem !important;
  transition: all 0.2s ease !important;
}

.thread-item:hover {
  background: var(--bg-tertiary) !important;
  transform: translateX(4px);
}

.thread-item.active {
  background: var(--primary-color) !important;
  color: white !important;
}

/* === CHAT CONTAINER === */
#chat-container {
  background: var(--bg-primary) !important;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* === MESSAGES === */
/* User message */
.user-message {
  background: var(--bg-tertiary) !important;
  border-radius: var(--radius-lg) !important;
  padding: 1rem 1.25rem !important;
  margin: 0.75rem 0 !important;
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--primary-color);
}

/* Assistant message */
.assistant-message {
  background: var(--bg-secondary) !important;
  border-radius: var(--radius-lg) !important;
  padding: 1rem 1.25rem !important;
  margin: 0.75rem 0 !important;
  box-shadow: var(--shadow-md);
}

/* Message avatars */
.message-avatar {
  border-radius: 50% !important;
  box-shadow: var(--shadow-sm);
  border: 2px solid var(--bg-tertiary);
}

/* === CODE BLOCKS === */
pre {
  background: #1E1E1E !important;
  border-radius: var(--radius-md) !important;
  padding: 1rem !important;
  border: 1px solid var(--bg-tertiary) !important;
  box-shadow: var(--shadow-md);
  overflow-x: auto;
}

code {
  font-family: 'Monaco', 'Menlo', 'Courier New', monospace !important;
  font-size: 0.9rem !important;
  color: #E5E7EB !important;
}

/* Inline code */
:not(pre) > code {
  background: var(--bg-tertiary) !important;
  padding: 0.2rem 0.4rem !important;
  border-radius: var(--radius-sm) !important;
  color: var(--primary-light) !important;
}

/* === TABLES === */
table {
  width: 100% !important;
  border-collapse: separate !important;
  border-spacing: 0 !important;
  border-radius: var(--radius-md) !important;
  overflow: hidden !important;
  box-shadow: var(--shadow-md);
  margin: 1rem 0 !important;
}

thead {
  background: var(--bg-tertiary) !important;
}

thead th {
  padding: 0.75rem 1rem !important;
  text-align: left !important;
  font-weight: 600 !important;
  color: var(--text-primary) !important;
  border-bottom: 2px solid var(--primary-color) !important;
}

tbody tr {
  background: var(--bg-secondary) !important;
  transition: background 0.2s ease;
}

tbody tr:hover {
  background: var(--bg-tertiary) !important;
}

tbody td {
  padding: 0.75rem 1rem !important;
  border-bottom: 1px solid var(--bg-tertiary) !important;
  color: var(--text-secondary) !important;
}

/* === INPUT AREA === */
#chat-input-container {
  background: var(--bg-secondary) !important;
  border-radius: var(--radius-xl) !important;
  padding: 1rem !important;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--bg-tertiary) !important;
}

#chat-input {
  background: var(--bg-tertiary) !important;
  color: var(--text-primary) !important;
  border: none !important;
  border-radius: var(--radius-lg) !important;
  padding: 0.75rem 1rem !important;
  font-size: 1rem !important;
  resize: none !important;
  transition: all 0.2s ease;
}

#chat-input:focus {
  outline: 2px solid var(--primary-color) !important;
  outline-offset: 2px;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Send button */
#send-button {
  background: var(--primary-color) !important;
  color: white !important;
  border-radius: var(--radius-md) !important;
  padding: 0.75rem 1.5rem !important;
  font-weight: 600 !important;
  transition: all 0.2s ease !important;
  border: none !important;
  box-shadow: var(--shadow-md);
}

#send-button:hover {
  background: var(--primary-hover) !important;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

#send-button:active {
  transform: translateY(0);
}

/* === SETTINGS PANEL === */
.settings-panel {
  background: var(--bg-secondary) !important;
  border-radius: var(--radius-lg) !important;
  padding: 1.5rem !important;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--bg-tertiary) !important;
}

.settings-item {
  margin: 1rem 0 !important;
  padding: 0.75rem !important;
  background: var(--bg-tertiary) !important;
  border-radius: var(--radius-md) !important;
  transition: background 0.2s ease;
}

.settings-item:hover {
  background: rgba(99, 102, 241, 0.1) !important;
}

/* Sliders */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-tertiary);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: all 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  background: var(--primary-hover);
  transform: scale(1.1);
}

/* === BUTTONS === */
button {
  border-radius: var(--radius-md) !important;
  font-weight: 500 !important;
  transition: all 0.2s ease !important;
}

button:hover {
  transform: translateY(-1px);
}

/* Primary button */
.button-primary {
  background: var(--primary-color) !important;
  color: white !important;
}

/* Secondary button */
.button-secondary {
  background: var(--bg-tertiary) !important;
  color: var(--text-primary) !important;
}

/* === FILE UPLOAD === */
.file-upload-area {
  border: 2px dashed var(--bg-tertiary) !important;
  border-radius: var(--radius-lg) !important;
  padding: 2rem !important;
  background: var(--bg-secondary) !important;
  transition: all 0.3s ease !important;
}

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

.file-upload-area.dragging {
  border-color: var(--primary-color) !important;
  background: rgba(99, 102, 241, 0.1) !important;
  transform: scale(1.02);
}

/* === BADGES & TAGS === */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  margin: 0.25rem;
}

.badge-admin {
  background: var(--accent-red);
  color: white;
}

.badge-business {
  background: var(--accent-green);
  color: white;
}

.badge-engineering {
  background: var(--primary-color);
  color: white;
}

.badge-architecture {
  background: var(--accent-yellow);
  color: var(--bg-primary);
}

/* === LOADING ANIMATION === */
.loading-dots {
  display: inline-flex;
  gap: 0.25rem;
}

.loading-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-color);
  animation: pulse 1.4s ease-in-out infinite;
}

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

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

@keyframes pulse {
  0%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  50% {
    opacity: 1;
    transform: scale(1);
  }
}

/* === SCROLLBAR CUSTOM === */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  #chat-container {
    padding: 0.75rem;
  }
  
  .user-message,
  .assistant-message {
    padding: 0.75rem !important;
  }
  
  #app-header {
    padding: 0.75rem !important;
  }
}

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

.message {
  animation: fadeIn 0.3s ease;
}

/* === TOOLTIPS === */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltiptext {
  visibility: hidden;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  text-align: center;
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.3s;
  font-size: 0.875rem;
  white-space: nowrap;
  box-shadow: var(--shadow-md);
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}