/* ========================================
   Design Tokens
   ======================================== */

:root {
  /* Farben */
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-border: #e0e0e0;
  --color-accent: #2563eb;
  --color-success: #16a34a;
  --color-error: #dc2626;
  --color-muted: #6b7280;
  --color-surface: #f9fafb;

  /* Typografie */
  --font-sans: system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, monospace;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;

  /* Spacing (8px Grid) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;

  /* Borders */
  --radius: 6px;
  --border: 1px solid var(--color-border);
}

/* ========================================
   Reset & Base
   ======================================== */

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

/* ========================================
   Focus Indicator (Accessibility)
   ======================================== */

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ========================================
   Reduced Motion
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========================================
   Top Bar (Header)
   ======================================== */

.top-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-lg);
  background: #1e293b;
  color: #ffffff;
  min-height: 56px;
}

.top-bar__logo {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.top-bar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* ========================================
   Status Dot
   ======================================== */

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #9ca3af;
}

.status-dot--ready {
  background: #4ade80;
}

.status-dot--indexing {
  background: #f59e0b;
  animation: pulse 1.5s ease-in-out infinite;
}

.status-dot--error {
  background: #ef4444;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ========================================
   Re-Index Button (Ghost)
   ======================================== */

.top-bar__reindex-btn {
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 1.125rem;
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  line-height: 1;
}

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

/* ========================================
   Container (Layout)
   ======================================== */

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

/* ========================================
   Login Card
   ======================================== */

.login-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-xl);
  background: var(--color-bg);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  border: var(--border);
  max-width: 400px;
  margin: var(--space-xl) auto;
}

.login-card p {
  color: var(--color-muted);
  margin: 0;
}

.top-bar__user {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
}

.top-bar__logout-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-xs) var(--space-sm);
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.top-bar__logout-btn:hover {
  background: var(--color-surface);
}

/* ========================================
   Search Card
   ======================================== */

.search-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: 20px;
  background: var(--color-bg);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  border: var(--border);
}

.search-card__input-row {
  display: flex;
  gap: var(--space-sm);
}

.search-card__input {
  flex: 1;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  padding: 12px 16px;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.4;
}

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

.search-card__btn {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  font-weight: 500;
  padding: 12px 20px;
  background: var(--color-accent);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
}

.search-card__btn:hover:not(:disabled) {
  background: #1d4ed8;
}

.search-card__btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========================================
   Results Area
   ======================================== */

.results {
  margin-top: var(--space-lg);
}

/* ========================================
   Answer Card
   ======================================== */

.answer-card {
  padding: 24px;
  background: var(--color-bg);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  border: var(--border);
  line-height: 1.6;
}

/* ========================================
   Source Card
   ======================================== */

.source-card {
  padding: var(--space-md);
  margin-top: var(--space-sm);
  background: var(--color-surface);
  border-radius: 10px;
  border-left: 3px solid var(--color-accent);
}

.source-cards {
  margin-top: var(--space-sm);
}

.source-card__path {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  margin-bottom: var(--space-xs);
}

.source-card__snippet {
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.5;
}

/* ========================================
   Vault Selector
   ======================================== */

.search-card__vault-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.search-card__vault-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-muted);
  white-space: nowrap;
}

.search-card__vault-select {
  flex: 1;
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  padding: 8px 12px;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
}

/* ========================================
   Question Display
   ======================================== */

.question-display {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  padding: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-accent);
}

/* ========================================
   Compare Grid
   ======================================== */

.compare-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .compare-grid {
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  }

  .container {
    max-width: 1200px;
  }
}

/* ========================================
   Answer Card — Model Label
   ======================================== */

.answer-card__model-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

/* ========================================
   Answer Card — RAG Miss
   ======================================== */

.answer-card__rag-miss {
  text-align: center;
  color: var(--color-muted);
}

.answer-card__rag-miss .no-answer-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: var(--space-sm);
}

/* ========================================
   Toast Notification
   ======================================== */

.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-sm) var(--space-lg);
  background: #1e293b;
  color: #ffffff;
  border-radius: 8px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  z-index: 200;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.toast--visible {
  opacity: 1;
  pointer-events: auto;
}

/* ========================================
   Answer Card States
   ======================================== */

.answer-card__text {
  white-space: pre-wrap;
}

.answer-card__text sup {
  color: var(--color-accent);
  font-weight: 600;
  cursor: default;
}

/* Loading: Skeleton */
.answer-card--loading .skeleton-line {
  height: 1rem;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--color-border) 25%, var(--color-surface) 50%, var(--color-border) 75%);
  background-size: 200% 100%;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
}

.answer-card--loading .skeleton-line + .skeleton-line {
  margin-top: var(--space-sm);
}

.answer-card--loading .skeleton-line:last-child {
  width: 60%;
}

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

/* No-Answer */
.answer-card--no-answer {
  text-align: center;
  color: var(--color-muted);
}

.answer-card--no-answer .no-answer-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: var(--space-sm);
}

/* Error */
.answer-card--error {
  border-color: var(--color-error);
  color: var(--color-error);
}

.answer-card--error .error-icon {
  font-size: 1.25rem;
  margin-right: var(--space-xs);
}