/**
 * MediCare AI — Knowledge Hub Styles (Personal Health AI OS V2)
 * Clean Clinical Design System, Responsive & Token-driven
 */

:root {
  --knowledge-hero-bg: radial-gradient(circle at 50% 0%, rgba(13, 148, 136, 0.12), transparent 60%),
                       linear-gradient(135deg, rgba(255, 255, 255, 0.85) 0%, rgba(248, 250, 252, 0.85) 100%);
  --knowledge-hero-border: rgba(13, 148, 136, 0.2);
  --glass-card-bg: rgba(255, 255, 255, 0.72);
  --glass-card-border: rgba(15, 23, 42, 0.08);
  --tag-bg: var(--accent-light, #ccfbf1);
  --tag-color: var(--accent-primary, #0d9488);
}

html[data-theme="dark"] {
  --knowledge-hero-bg: radial-gradient(circle at 50% 0%, rgba(20, 184, 166, 0.18), transparent 65%),
                       linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(11, 19, 28, 0.85) 100%);
  --knowledge-hero-border: rgba(20, 184, 166, 0.25);
  --glass-card-bg: rgba(15, 23, 42, 0.65);
  --glass-card-border: rgba(255, 255, 255, 0.08);
  --tag-bg: rgba(20, 184, 166, 0.15);
  --tag-color: #2dd4bf;
}

/* Base resets & layout */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body.page-knowledge-v2 {
  min-width: 320px;
  background-color: var(--bg-l0, #f8fafc);
  background-image: 
    radial-gradient(at 8% 12%, rgba(13, 148, 136, 0.07) 0px, transparent 40%),
    radial-gradient(at 92% 18%, rgba(56, 189, 248, 0.07) 0px, transparent 40%),
    radial-gradient(at 50% 80%, rgba(99, 102, 241, 0.04) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  overflow-x: hidden;
}

.hidden {
  display: none !important;
}

button, input {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Topbar Context Bar */
.page-knowledge-v2 .topbar.os-topbar {
  position: sticky;
  top: 0;
  z-index: 80;
  height: 68px;
  margin-left: var(--nav-rail-width, 76px);
  width: calc(100% - var(--nav-rail-width, 76px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--motion-fast);
}

.os-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  color: #ffffff;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  font-size: 22px;
  font-weight: 900;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.os-brand strong {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  display: block;
}

.os-brand em {
  color: var(--accent-primary);
  font-style: normal;
}

.os-brand small {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.os-context-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--bg-l1);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.back-overview-btn {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-l1);
  transition: all var(--motion-fast);
}

.back-overview-btn:hover {
  color: var(--accent-primary);
  background: var(--accent-light);
  border-color: var(--accent-primary);
}

.top-actions .icon-button {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  background: var(--bg-l1);
  color: var(--text-secondary);
  display: grid;
  place-items: center;
  font-size: 1rem;
  transition: all var(--motion-fast);
}

.top-actions .icon-button:hover {
  background: var(--bg-l2);
  color: var(--text-primary);
}

.account-button {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 10px 4px 4px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background: var(--bg-l1);
  transition: all var(--motion-fast);
}

.account-button:hover {
  background: var(--bg-l2);
  border-color: var(--border-strong);
}

.account-avatar {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  font-weight: 700;
  font-size: 0.85rem;
}

.account-button strong {
  display: block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.account-button small {
  display: block;
  font-size: 0.7rem;
  color: var(--text-tertiary);
  line-height: 1.2;
}

/* Main Page Container */
.knowledge-page {
  margin-left: var(--nav-rail-width, 76px);
  width: calc(100% - var(--nav-rail-width, 76px));
  max-width: var(--content-wide-max, 1680px);
  margin-right: auto;
  padding: 32px 36px 80px;
}

/* Integrated Knowledge Stage (Unified Centered Clinical Workspace) */
.knowledge-hero,
.knowledge-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 44px 36px 36px;
  border-radius: var(--radius-2xl);
  background: var(--knowledge-hero-bg);
  border: 1px solid var(--knowledge-hero-border);
  box-shadow: 0 12px 36px rgba(13, 148, 136, 0.08), var(--shadow-md);
  position: relative;
  overflow: hidden;
  margin-bottom: 20px;
}

.stage-ambient-glow {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.22) 0%, rgba(56, 189, 248, 0.12) 40%, transparent 70%);
  pointer-events: none;
  filter: blur(28px);
}

.stage-header {
  position: relative;
  z-index: 2;
  max-width: 860px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stage-eyebrow,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: var(--tag-bg);
  color: var(--tag-color);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-primary, #0d9488);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.25);
  animation: pulse-ring 3s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.stage-title,
.hero-copy h1 {
  font-size: clamp(1.9rem, 3.2vw, 2.55rem);
  font-weight: 850;
  letter-spacing: -0.025em;
  line-height: 1.22;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.stage-subtitle,
.hero-copy p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 720px;
  margin: 0 auto;
}

/* Focal Search Console (Search + Integrated AI Trigger) */
.stage-search-console {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  max-width: 840px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.knowledge-search {
  flex: 1;
  min-width: 280px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 18px;
  background: var(--glass-card-bg, rgba(255, 255, 255, 0.85));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
  transition: all var(--motion-fast);
}

.knowledge-search:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 4px var(--accent-light), 0 8px 24px rgba(13, 148, 136, 0.15);
  background: var(--bg-l1, #ffffff);
}

.search-icon {
  font-size: 1.25rem;
  color: var(--text-tertiary);
}

.knowledge-search input {
  flex: 1;
  height: 44px;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.96rem;
  font-weight: 500;
}

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

.knowledge-search button {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: var(--bg-l3);
  color: var(--text-secondary);
  font-size: 16px;
  display: grid;
  place-items: center;
  transition: all var(--motion-fast);
}

.knowledge-search button:hover {
  background: var(--border-strong);
  color: var(--text-primary);
}

/* Integrated AI Ask Pill */
.stage-ask-ai-pill,
.hero-ask-ai-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--accent-primary, #0d9488), var(--accent-secondary, #0284c7));
  color: #ffffff;
  font-weight: 750;
  font-size: 0.9rem;
  box-shadow: 0 4px 16px var(--accent-glow);
  white-space: nowrap;
  transition: transform var(--motion-fast), box-shadow var(--motion-fast);
}

.stage-ask-ai-pill:hover,
.hero-ask-ai-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
  color: #ffffff;
}

.ask-ai-sparkle {
  color: #fef08a;
  font-size: 1.05rem;
  animation: pulseWarning 2s infinite ease-in-out;
}

.ask-ai-arrow {
  transition: transform var(--motion-fast);
}

.stage-ask-ai-pill:hover .ask-ai-arrow {
  transform: translateX(3px);
}

/* Quick Topic Pills */
.hero-quick-topics {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

.hero-quick-topics span {
  font-weight: 600;
  margin-right: 4px;
}

.hero-quick-topics button {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background: var(--glass-card-bg, rgba(255, 255, 255, 0.7));
  backdrop-filter: blur(8px);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  transition: all var(--motion-fast);
}

.hero-quick-topics button:hover {
  background: var(--accent-light);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

/* CLINICAL SAFETY STRIP (115 Emergency Inline Affordance) */
.knowledge-safety-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 24px;
  border-radius: var(--radius-xl);
  background: radial-gradient(circle at 10% 50%, rgba(239, 68, 68, 0.08) 0%, transparent 60%),
              var(--glass-card-bg, rgba(255, 255, 255, 0.75));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(239, 68, 68, 0.28);
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.06);
  margin-bottom: 20px;
  transition: border-color var(--motion-fast);
}

.safety-strip-content {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
}

.knowledge-safety-strip .safety-pulse-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ef4444;
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.7);
  flex-shrink: 0;
  animation: pulseWarning 1.6s infinite;
}

.safety-strip-body strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 800;
  color: #ef4444;
  margin-bottom: 3px;
  letter-spacing: -0.01em;
}

.safety-strip-body p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.safety-strip-call-btn,
.emergency-call-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 10px 20px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.86rem;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
  transition: all var(--motion-fast);
  flex-shrink: 0;
}

.safety-strip-call-btn:hover,
.emergency-call-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.45);
  color: #ffffff;
}

/* Category Filter Strip */
.category-strip {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 12px 2px 24px;
  scrollbar-width: none;
}

.category-strip::-webkit-scrollbar {
  display: none;
}

.category-strip button {
  padding: 10px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background: var(--bg-l1);
  color: var(--text-secondary);
  font-size: 0.84rem;
  font-weight: 700;
  white-space: nowrap;
  transition: all var(--motion-fast);
}

.category-strip button:hover {
  background: var(--bg-l2);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.category-strip button.active {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  box-shadow: 0 4px 14px var(--accent-glow);
}

/* Knowledge Layout Grid (Main + Sidebar) */
.knowledge-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 28px;
  align-items: start;
}

/* Article Section */
.article-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.heading-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.heading-badge {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--accent-light);
  font-size: 1.1rem;
}

.heading-left h2 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}

.heading-left small {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-tertiary);
}

/* Article Grid */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.knowledge-card {
  display: flex;
  flex-direction: column;
  background: var(--glass-card-bg, rgba(255, 255, 255, 0.75));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 24px;
  transition: transform var(--motion-fast), box-shadow var(--motion-fast), border-color var(--motion-fast);
  box-shadow: var(--shadow-sm);
}

.knowledge-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-primary);
  box-shadow: 0 12px 30px rgba(13, 148, 136, 0.12), var(--shadow-md);
}

/* Featured Editorial Guide Card (Hierarchical Focal Article) */
.knowledge-card.featured-card {
  grid-column: 1 / -1;
  position: relative;
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.08) 0%, rgba(56, 189, 248, 0.05) 50%, var(--glass-card-bg, rgba(255, 255, 255, 0.78)) 100%);
  border: 1px solid rgba(13, 148, 136, 0.35);
  box-shadow: 0 14px 34px rgba(13, 148, 136, 0.1), var(--shadow-sm);
  padding: 28px 32px;
}

.featured-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.18), rgba(217, 119, 6, 0.12));
  color: #b45309;
  border: 1px solid rgba(245, 158, 11, 0.35);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

html[data-theme="dark"] .featured-badge-pill {
  color: #fcd34d;
  border-color: rgba(245, 158, 11, 0.5);
}

.featured-card .card-main-body {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.95fr);
  gap: 32px;
  align-items: stretch;
}

.featured-card .card-lead-column {
  display: flex;
  flex-direction: column;
}

.featured-card .card-lead-column h3 {
  font-size: 1.35rem;
  font-weight: 850;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 10px;
}

.featured-card .card-lead-column p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.featured-action-points {
  display: flex;
  flex-direction: column;
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  background: var(--bg-l2, rgba(241, 245, 249, 0.7));
  border-left: 3.5px solid var(--accent-primary, #0d9488);
  border-top: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

html[data-theme="dark"] .featured-action-points {
  background: rgba(30, 41, 59, 0.55);
}

.points-label {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-primary);
  margin-bottom: 12px;
}

.featured-action-points ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.featured-action-points ul li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  position: relative;
  padding-left: 18px;
}

.featured-action-points ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: 800;
  font-size: 0.82rem;
}

@media (max-width: 900px) {
  .featured-card .card-main-body {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

.card-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  display: grid;
  place-items: center;
  font-size: 1.35rem;
}

.card-icon.blue { background: rgba(59, 130, 246, 0.12); }
.card-icon.orange { background: rgba(249, 115, 22, 0.12); }
.card-icon.pink { background: rgba(236, 72, 153, 0.12); }
.card-icon.red { background: rgba(239, 68, 68, 0.12); }
.card-icon.yellow { background: rgba(234, 179, 8, 0.12); }

.card-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--tag-bg);
  color: var(--tag-color);
}

.knowledge-card h3 {
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 8px;
}

.knowledge-card p {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.knowledge-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 22px;
  padding: 0;
}

.knowledge-card ul li {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  position: relative;
  padding-left: 18px;
}

.knowledge-card ul li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: var(--accent-primary);
  font-size: 1.1rem;
}

.card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.card-actions button {
  padding: 8px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-l2);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 700;
  transition: all var(--motion-fast);
}

.card-actions button:hover {
  background: var(--accent-light);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.card-actions a {
  padding: 8px 16px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 700;
  box-shadow: 0 2px 8px var(--accent-glow);
  transition: all var(--motion-fast);
}

.card-actions a:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--accent-glow);
}

/* Empty Search Results State */
.empty-results {
  padding: 64px 32px;
  border-radius: var(--radius-xl);
  border: 1.5px dashed var(--border-strong);
  background: var(--bg-l1);
  text-align: center;
}

.empty-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 14px;
  opacity: 0.7;
}

.empty-results h3 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-results p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 20px;
  line-height: 1.6;
}

.empty-results .btn-ask-ai {
  display: inline-flex;
  padding: 10px 22px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  font-weight: 700;
  font-size: 0.88rem;
  box-shadow: 0 4px 14px var(--accent-glow);
}

/* Safety & Context Sidebar */
.knowledge-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.side-card {
  padding: 24px;
  border-radius: var(--radius-xl);
  background: var(--glass-card-bg, rgba(255, 255, 255, 0.72));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.side-card h2 {
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.side-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Safety Card 115 Emergency */
.safety-card {
  border-color: rgba(239, 68, 68, 0.35);
  background: radial-gradient(circle at 90% 10%, rgba(239, 68, 68, 0.08), transparent 60%),
              var(--bg-l1);
}

.safety-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.safety-head h2 {
  color: #ef4444;
  margin-bottom: 0;
}

.safety-pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ef4444;
  box-shadow: 0 0 10px #ef4444;
  animation: pulseWarning 1.5s infinite;
}

@keyframes pulseWarning {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}

.emergency-call-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 16px;
  padding: 11px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.88rem;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
  transition: all var(--motion-fast);
}

.emergency-call-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(239, 68, 68, 0.45);
}

/* Topic list pills */
.topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.topic-list button {
  padding: 6px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background: var(--bg-l2);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  transition: all var(--motion-fast);
}

.topic-list button:hover {
  background: var(--accent-light);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* Active Profile Context */
.profile-info-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
}

.profile-info-row .profile-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  font-weight: 800;
  font-size: 1.05rem;
  display: grid;
  place-items: center;
}

.profile-meta-text strong {
  display: block;
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--text-primary);
}

.profile-meta-text small {
  display: block;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: 2px;
}

.switch-profile-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-primary);
  transition: all var(--motion-fast);
}

.switch-profile-link:hover {
  text-decoration: underline;
}

/* Disclaimer */
.side-card.disclaimer {
  background: var(--bg-l2);
  border-style: dashed;
}

.side-card.disclaimer p {
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

/* Article Preview Modal */
.article-modal {
  position: fixed;
  inset: 0;
  z-index: 5000;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.article-modal-card {
  position: relative;
  width: min(720px, 100%);
  max-height: 86vh;
  overflow-y: auto;
  padding: 36px;
  border-radius: var(--radius-2xl);
  background: var(--bg-l1);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-xl);
}

.article-modal-card > button {
  position: absolute;
  right: 20px;
  top: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--bg-l2);
  color: var(--text-secondary);
  font-size: 22px;
  display: grid;
  place-items: center;
  transition: all var(--motion-fast);
}

.article-modal-card > button:hover {
  background: var(--border-strong);
  color: var(--text-primary);
}

.modal-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--tag-bg);
  color: var(--tag-color);
  font-size: 0.74rem;
  font-weight: 750;
  margin-bottom: 12px;
}

.article-modal-card h2 {
  font-size: 1.45rem;
  font-weight: 850;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 18px;
  padding-right: 40px;
}

.modal-rich-content {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.modal-rich-content p {
  margin: 12px 0;
}

.modal-rich-content ul {
  display: grid;
  gap: 10px;
  padding-left: 24px;
  margin: 14px 0;
}

.modal-footer-actions {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}

.modal-ask-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  font-weight: 800;
  font-size: 0.88rem;
  box-shadow: 0 4px 14px var(--accent-glow);
  transition: all var(--motion-fast);
}

.modal-ask-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px var(--accent-glow);
}

/* Mobile Bottom Navigation */
.mobile-bottom-nav {
  display: none;
}

/* Responsive Media Queries */
@media (max-width: 1200px) {
  .knowledge-hero {
    grid-template-columns: 1fr;
  }
  .hero-help-card {
    max-width: 100%;
  }
}

@media (max-width: 1024px) {
  .knowledge-layout {
    grid-template-columns: 1fr;
  }
  .knowledge-sidebar {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .page-knowledge-v2 .app-nav-rail {
    display: none !important;
  }

  .page-knowledge-v2 .topbar.os-topbar {
    margin-left: 0;
    width: 100%;
    padding: 0 16px;
    height: 60px;
  }

  .knowledge-page {
    margin-left: 0;
    width: 100%;
    padding: 16px 16px 96px;
  }

  .knowledge-hero {
    padding: 24px 18px;
  }

  .hero-copy h1 {
    font-size: 1.45rem;
  }

  .article-grid {
    grid-template-columns: 1fr;
  }

  .knowledge-sidebar {
    grid-template-columns: 1fr;
  }

  .os-context-pill {
    display: none;
  }

  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    z-index: 90;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-subtle);
    align-items: center;
    justify-content: space-around;
    padding: 0 8px;
  }

  .mobile-bottom-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--text-tertiary);
    font-size: 0.68rem;
    font-weight: 600;
    text-decoration: none;
    flex: 1;
    height: 100%;
    transition: color var(--motion-fast);
  }

  .mobile-bottom-item.active {
    color: var(--accent-primary);
  }

  .mobile-bottom-item svg {
    stroke-width: 2.2;
  }
}

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