/* ==========================================================
   ui-enhancements.css — Premium UI upgrades
   Glassmorphism · Ambient glows · Micro-animations · Pipeline badges
   ========================================================== */

/* ─── Glassmorphic Nav Rail ──────────────────────────────── */
.nav-rail {
  background: rgba(20, 23, 27, 0.82) !important;
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-right: 1px solid rgba(255, 255, 255, 0.06) !important;
}

[data-theme="light"] .nav-rail {
  background: rgba(247, 248, 250, 0.85) !important;
  border-right: 1px solid rgba(0, 0, 0, 0.08) !important;
}

/* ─── Glassmorphic Topbar ────────────────────────────────── */
.topbar {
  background: rgba(11, 13, 16, 0.80) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05) !important;
}

[data-theme="light"] .topbar {
  background: rgba(255, 255, 255, 0.85) !important;
  border-bottom: 1px solid rgba(0, 0, 0, 0.07) !important;
}

/* ─── Ambient Accent Glow on App Background ─────────────── */
#app::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 40% at 20% 0%, rgba(99, 102, 241, 0.12), transparent 70%),
    radial-gradient(ellipse 50% 30% at 80% 100%, rgba(56, 189, 248, 0.07), transparent 70%);
  z-index: 0;
}

/* Ensure content sits above glow */
.nav-rail, .main-content, .mobile-nav { z-index: 1; }

/* ─── Nav Link Hover Spring Lift ─────────────────────────── */
.nav-link {
  transition: background var(--duration-micro) var(--ease-out),
              transform var(--duration-fast) var(--ease-spring),
              color var(--duration-fast) var(--ease-out) !important;
}
.nav-link:hover { transform: translateX(3px); }
.nav-link.active {
  background: var(--accent-subtle);
  color: var(--accent);
  box-shadow: inset 3px 0 0 var(--accent);
}

/* ─── KB Cards Lift on Hover ─────────────────────────────── */
.card {
  transition: transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out) !important;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(99, 102, 241, 0.15), var(--shadow-md);
  border-color: rgba(99, 102, 241, 0.35) !important;
}

/* ─── Dashboard Stat Cards — Accent Glow ─────────────────── */
.stat-card {
  position: relative;
  overflow: hidden;
  transition: transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base) var(--ease-out) !important;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.20), transparent 70%);
  pointer-events: none;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.14), var(--shadow-sm);
}
.stat-value {
  background: linear-gradient(135deg, var(--text-primary) 60%, var(--accent-text));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── RAG Pipeline Stage Badges ─────────────────────────── */
.rag-pipeline {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.pipeline-stage {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: var(--weight-medium);
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  opacity: 0;
  transform: translateY(4px);
  animation: stagePop var(--duration-base) var(--ease-spring) forwards;
}

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

.pipeline-stage.stage-optimize {
  background: rgba(99, 102, 241, 0.12);
  border-color: rgba(99, 102, 241, 0.25);
  color: var(--accent-text);
}
.pipeline-stage.stage-search {
  background: rgba(56, 189, 248, 0.10);
  border-color: rgba(56, 189, 248, 0.22);
  color: var(--info);
}
.pipeline-stage.stage-rerank {
  background: rgba(34, 197, 94, 0.10);
  border-color: rgba(34, 197, 94, 0.22);
  color: var(--success);
}

/* ─── Streaming Answer Fade-In ───────────────────────────── */
.assistant-bubble {
  animation: streamFadeIn 180ms var(--ease-out) both;
}
@keyframes streamFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Copy Code Button on Pre Blocks ─────────────────────── */
pre {
  position: relative;
}
.copy-code-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 10px;
  font-size: 11px;
  font-family: inherit;
  font-weight: var(--weight-medium);
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
  z-index: 2;
}
pre:hover .copy-code-btn { opacity: 1; }
.copy-code-btn:hover {
  color: var(--accent-text);
  border-color: var(--accent);
}
.copy-code-btn.copied {
  color: var(--success);
  border-color: var(--success);
  opacity: 1;
}

/* ─── Context Chunk Cards — Score Glow ───────────────────── */
.context-chunk {
  transition: transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out) !important;
}
.context-chunk:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.12);
  border-color: rgba(99, 102, 241, 0.28) !important;
}

/* Confidence badge color coding */
.confidence-high   { background: rgba(34, 197, 94, 0.12);  color: var(--success); border: 1px solid rgba(34, 197, 94, 0.25); }
.confidence-medium { background: rgba(245, 158, 11, 0.12); color: var(--warning); border: 1px solid rgba(245, 158, 11, 0.25); }
.confidence-low    { background: rgba(239, 68, 68, 0.12);  color: var(--danger);  border: 1px solid rgba(239, 68, 68, 0.25); }

/* ─── Buttons — Spring Scale ─────────────────────────────── */
.btn {
  transition: all var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-spring) !important;
}
.btn:active:not(:disabled) { transform: scale(0.96); }
.btn-primary:hover:not(:disabled) {
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

/* ─── Chat Topbar KB Badge — Glow ───────────────────────── */
.chat-kb-badge {
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out) !important;
}
.chat-kb-badge:hover {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

/* ─── Upload Dropzone — Pulse Glow on Drag ───────────────── */
.dropzone.drag-over {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 4px var(--accent-subtle),
              0 0 32px rgba(99, 102, 241, 0.20);
  animation: dropzonePulse 1.4s var(--ease-in-out) infinite;
}
@keyframes dropzonePulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--accent-subtle), 0 0 32px rgba(99, 102, 241, 0.20); }
  50%       { box-shadow: 0 0 0 8px var(--accent-subtle), 0 0 48px rgba(99, 102, 241, 0.30); }
}

/* ─── Page transition ────────────────────────────────────── */
#view-container > * {
  animation: slideUp var(--duration-base) var(--ease-out) both;
}

/* ─── Logo Icon Gradient ─────────────────────────────────── */
.logo-icon {
  background: linear-gradient(135deg, var(--accent), var(--info)) !important;
  box-shadow: 0 2px 12px rgba(99, 102, 241, 0.40);
  transition: box-shadow var(--duration-base) var(--ease-out);
}
.nav-logo:hover .logo-icon {
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.60);
}