/**
 * VasBot PWA - Main Stylesheet
 * Modern dark theme with accent colors
 */

/* ===== CSS Variables ===== */
:root {
  /* Colors */
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #1f2940;
  --bg-input: #2a3a5a;
  --bg-hover: #2d3f5f;
  
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --text-muted: #718096;
  
  --accent-primary: #4a90d9;
  --accent-secondary: #38b2ac;
  --accent-success: #48bb78;
  --accent-warning: #ed8936;
  --accent-danger: #fc8181;
  
  --border-color: #2d3748;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  
  /* Layout */
  --header-height: 56px;
  --nav-height: 64px;
  --max-width: 768px;
  
  /* Safe areas for mobile */
  --safe-top: env(safe-area-inset-top);
  --safe-bottom: env(safe-area-inset-bottom);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  padding-top: var(--safe-top);
  padding-bottom: calc(var(--nav-height) + var(--safe-bottom));
}

/* ===== App Layout ===== */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  padding-top: var(--safe-top);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--spacing-md);
  z-index: 100;
}

.app-header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.app-header .logo {
  width: 32px;
  height: 32px;
}

.app-content {
  flex: 1;
  margin-top: calc(var(--header-height) + var(--safe-top));
  padding: var(--spacing-md);
  max-width: var(--max-width);
  margin-inline: auto;
  width: 100%;
}

/* ===== Bottom Navigation ===== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--nav-height) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 100;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--spacing-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.75rem;
  transition: color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.nav-item svg {
  width: 24px;
  height: 24px;
}

.nav-item.active,
.nav-item:hover {
  color: var(--accent-primary);
}

/* ===== Pages/Views ===== */
.page {
  display: none;
  animation: fadeIn var(--transition-normal);
}

.page.active {
  display: block;
}

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

/* ===== Search Bar ===== */
.search-container {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  padding-left: 48px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.2);
}

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

.search-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 20px;
  height: 20px;
}

.search-clear {
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--spacing-xs);
  display: none;
}

.search-input:not(:placeholder-shown) + .search-icon + .search-clear {
  display: block;
}

/* ===== Filter Chips ===== */
.filter-chips {
  display: flex;
  gap: var(--spacing-sm);
  overflow-x: auto;
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.filter-chips::-webkit-scrollbar {
  display: none;
}

.chip {
  flex-shrink: 0;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.chip:hover,
.chip.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-fast);
}

.card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-sm);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.card-badge {
  padding: 2px 8px;
  background: var(--accent-primary);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}

.card-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
}

.card-snippet {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.btn-primary {
  background: var(--accent-primary);
  color: var(--text-primary);
}

.btn-primary:hover {
  background: #5a9fe9;
}

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-secondary);
}

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

.btn-icon {
  padding: var(--spacing-sm);
  background: transparent;
  color: var(--text-secondary);
}

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

.btn-block {
  width: 100%;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.2);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* ===== Chat Interface ===== */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--header-height) - var(--nav-height) - var(--safe-top) - var(--safe-bottom) - var(--spacing-xl));
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.message {
  max-width: 85%;
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  animation: messageIn var(--transition-normal);
}

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

.message.user {
  align-self: flex-end;
  background: var(--accent-primary);
  color: var(--text-primary);
  border-bottom-right-radius: var(--radius-sm);
}

.message.bot {
  align-self: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: var(--radius-sm);
}

.message-content {
  font-size: 0.9375rem;
  line-height: 1.5;
}

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

.message-content p:last-child {
  margin-bottom: 0;
}

.chat-input-container {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.chat-input {
  flex: 1;
  padding: var(--spacing-md);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: 1rem;
  resize: none;
  max-height: 120px;
}

.chat-send {
  padding: var(--spacing-md);
  background: var(--accent-primary);
  border: none;
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.chat-send:hover {
  background: #5a9fe9;
}

.chat-send:disabled {
  background: var(--bg-input);
  color: var(--text-muted);
  cursor: not-allowed;
}

/* ===== Lists ===== */
.list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.list-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.list-item:hover {
  border-color: var(--accent-primary);
}

.list-item-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  color: var(--accent-primary);
}

.list-item-content {
  flex: 1;
  min-width: 0;
}

.list-item-title {
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.list-item-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ===== Empty States ===== */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

/* ===== Loading States ===== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== Toast Notifications ===== */
.toast-container {
  position: fixed;
  top: calc(var(--header-height) + var(--safe-top) + var(--spacing-md));
  left: var(--spacing-md);
  right: var(--spacing-md);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  pointer-events: none;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-lg);
  animation: toastIn var(--transition-normal);
  pointer-events: auto;
}

.toast.success { border-left: 3px solid var(--accent-success); }
.toast.error { border-left: 3px solid var(--accent-danger); }
.toast.warning { border-left: 3px solid var(--accent-warning); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Modals ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

.modal-backdrop.active {
  display: flex;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow: hidden;
  animation: modalIn var(--transition-normal);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

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

.modal-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--spacing-xs);
}

.modal-body {
  padding: var(--spacing-md);
  overflow-y: auto;
  max-height: 60vh;
}

.modal-footer {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
  padding: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

/* ===== Utilities ===== */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--accent-success); }
.text-warning { color: var(--accent-warning); }
.text-danger { color: var(--accent-danger); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }

/* ===== Install Prompt ===== */
.install-prompt {
  position: fixed;
  bottom: calc(var(--nav-height) + var(--safe-bottom) + var(--spacing-md));
  left: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  display: none;
  gap: var(--spacing-md);
  align-items: center;
  box-shadow: var(--shadow-lg);
  z-index: 150;
}

.install-prompt.show {
  display: flex;
}

.install-prompt-content {
  flex: 1;
}

.install-prompt-title {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.install-prompt-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ===== Responsive ===== */
@media (min-width: 768px) {
  .app-content {
    padding: var(--spacing-lg);
  }
  
  .card-actions {
    justify-content: flex-start;
  }
}
/* ===== Preview Modal Styles ===== */
.modal-large {
  max-width: 900px;
  max-height: 95vh;
}

.preview-container {
  position: relative;
  min-height: 400px;
  max-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  overflow: auto;
}

.preview-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  color: var(--text-secondary);
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.preview-image {
  max-width: 100%;
  max-height: 70vh;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
}

.preview-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--accent-danger);
  padding: var(--spacing-xl);
  text-align: center;
}

.modal-backdrop.hidden {
  display: none;
}
/* ===== Print ===== */
@media print {
  .app-header,
  .bottom-nav,
  .install-prompt {
    display: none !important;
  }
  
  body {
    padding: 0;
    background: white;
    color: black;
  }
}