:root {
  --primary: #0284c7;
  --primary-dark: #0369a1;
  --primary-light: #e0f2fe;
  --accent: #0d9488;
  --accent-light: #ccfbf1;
  --emergency: #dc2626;
  --emergency-light: #fee2e2;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #0f172a;
  --text-muted: #475569;
  --border: #e2e8f0;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-tap-highlight-color: transparent;
  padding-bottom: 70px; /* Space for bottom nav */
}

/* Header & Banner */
header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgb(0 0 0 / 0.05);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 800px;
  margin: 0 auto;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.logo-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.025em;
}

.status-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.status-badge.online {
  background-color: #dcfce7;
  color: #15803d;
}

.status-badge.offline {
  background-color: #ffedd5;
  color: #c2410c;
}

/* Container */
.main-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 16px;
}

/* Offline Banner */
.offline-banner {
  background-color: #fed7aa;
  color: #7c2d12;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  text-align: center;
  display: none;
}

/* Search Box */
.search-wrapper {
  margin-bottom: 16px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 14px 16px 14px 44px;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: 12px;
  outline: none;
  transition: border-color 0.2s;
  box-shadow: var(--shadow);
}

.search-input:focus {
  border-color: var(--primary);
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

/* Filter Tags */
.filter-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 16px;
  scrollbar-width: none;
}

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

.filter-btn {
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background-color: #ffffff;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.filter-btn.active {
  background-color: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary);
}

.filter-btn.emergency.active {
  background-color: var(--emergency-light);
  color: var(--emergency);
  border-color: var(--emergency);
}

/* Article Cards */
.article-list {
  display: grid;
  gap: 12px;
}

.article-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-decoration: none;
  color: inherit;
}

.article-card:active {
  transform: scale(0.98);
}

.card-content {
  flex-grow: 1;
  padding-right: 12px;
}

.card-category {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  display: inline-block;
  padding: 2px 6px;
  border-radius: 4px;
}

.cat-emergency { background-color: var(--emergency-light); color: var(--emergency); }
.cat-medication { background-color: #fef9c3; color: #854d0e; }
.cat-diagnosis { background-color: #e0f2fe; color: #0369a1; }
.cat-standard { background-color: #f3e8ff; color: #6b21a8; }

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.card-summary {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-chevron {
  color: var(--text-muted);
  font-size: 1.2rem;
}

/* Detail View */
.detail-view {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow-lg);
}

.detail-header {
  border-bottom: 2px solid var(--border);
  padding-bottom: 16px;
  margin-bottom: 16px;
}

.detail-category {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 8px;
  border-radius: 6px;
  display: inline-block;
  margin-bottom: 8px;
}

.detail-title {
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 8px;
}

.detail-summary {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-style: italic;
}

.detail-section {
  margin-bottom: 18px;
  background-color: #f8fafc;
  padding: 12px 16px;
  border-radius: 10px;
  border-left: 4px solid var(--primary);
}

.detail-section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.detail-section.emergency {
  border-left-color: var(--emergency);
  background-color: var(--emergency-light);
}
.detail-section.emergency .detail-section-title {
  color: var(--emergency);
}

.bullet-list {
  list-style: none;
}

.bullet-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.bullet-list li::before {
  content: "•";
  color: var(--text-muted);
  font-weight: bold;
  font-size: 1.2rem;
  position: absolute;
  left: 4px;
  top: -2px;
}

.detail-section.emergency .bullet-list li::before {
  color: var(--emergency);
}

/* Emergency Specific Styling */
.emergency-alert-theme {
  border: 3px solid var(--emergency);
  background-color: #fffafb;
}

.emergency-alert-theme .detail-header {
  border-bottom-color: var(--emergency);
}

.emergency-alert-theme .detail-title {
  color: var(--emergency);
  font-size: 1.8rem;
}

/* Edit & Forms */
.form-group {
  margin-bottom: 16px;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 10px 12px;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  background-color: #ffffff;
}

.form-control:focus {
  border-color: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s;
  gap: 8px;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
}

.btn-emergency {
  background-color: var(--emergency);
  color: #ffffff;
}

.btn-emergency:hover {
  background-color: #b91c1c;
}

.btn-secondary {
  background-color: #e2e8f0;
  color: var(--text);
}

.btn-secondary:hover {
  background-color: #cbd5e1;
}

.btn-block {
  width: 100%;
  display: flex;
}

.btn-outline {
  border: 1px solid var(--border);
  background-color: transparent;
}

.btn-danger-outline {
  border: 1px solid var(--emergency);
  color: var(--emergency);
  background-color: transparent;
}

/* Dynamic form sections */
.section-builder-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  background-color: #ffffff;
  margin-bottom: 12px;
}

.builder-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

/* Navigation bottom bar */
.nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: #ffffff;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-around;
  padding: 6px 0;
  z-index: 100;
  box-shadow: 0 -2px 10px rgb(0 0 0 / 0.05);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 600;
  background: none;
  border: none;
  cursor: pointer;
  flex-grow: 1;
  gap: 4px;
}

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

.nav-item.emergency {
  color: var(--text-muted);
}

.nav-item.emergency.active {
  color: var(--emergency);
}

.nav-item-icon {
  font-size: 1.35rem;
}

/* Review Flow Comparisons */
.revision-card {
  background-color: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.revision-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.comparison-box {
  background-color: #f1f5f9;
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.comp-header {
  font-weight: 700;
  margin-bottom: 4px;
}

.comp-diff {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 8px;
}

@media (min-width: 600px) {
  .comp-diff {
    grid-template-columns: 1fr 1fr;
  }
}

.diff-panel {
  padding: 8px;
  border-radius: 6px;
  background-color: #ffffff;
  border: 1px solid var(--border);
}

.diff-panel.old {
  border-left: 3px solid var(--emergency);
  background-color: #fff5f5;
}

.diff-panel.new {
  border-left: 3px solid var(--accent);
  background-color: #f0fdf4;
}

/* Modals / Notifications */
.toast {
  position: fixed;
  bottom: 85px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #1e293b;
  color: #ffffff;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transition: opacity 0.3s;
  display: none;
  white-space: nowrap;
}

/* View switching */
.view {
  display: none;
}

.view.active {
  display: block;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 32px 16px;
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 8px;
}

/* Metronome/Timer for Emergency CPR */
.timer-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background-color: var(--emergency-light);
  padding: 12px;
  border-radius: 10px;
  margin-bottom: 16px;
  border: 1px solid var(--emergency);
}

.timer-digits {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--emergency);
  font-family: monospace;
}

.cpr-beat {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: #cbd5e1;
  transition: background-color 0.05s;
}

.cpr-beat.active {
  background-color: var(--emergency);
  box-shadow: 0 0 10px var(--emergency);
}

/* Floating Action Button (FAB) */
.fab {
  position: fixed;
  bottom: 85px;
  right: 16px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  box-shadow: var(--shadow-lg);
  border: none;
  cursor: pointer;
  z-index: 90;
}

.fab:hover {
  background-color: var(--primary-dark);
}