/* Style System Core: Modern SECH SA Corporate Branding & Glassmorphism */
:root {
  /* SECH SA Corporate brand colors */
  --sech-red: #CF102D;
  --sech-red-glow: rgba(207, 16, 45, 0.15);
  --sech-grey: #5A5A5A;
  
  /* Dark Mode Palette (Default Theme) */
  --bg-primary: #0C0F16;
  --bg-secondary: #131722;
  --bg-panel: rgba(24, 28, 41, 0.75);
  --bg-active: #20273A;
  --bg-top-bar: rgba(7, 10, 19, 0.8);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(207, 16, 45, 0.4);
  
  --text-primary: #F3F4F6;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;
  
  --electric: var(--sech-red);
  --electric-glow: var(--sech-red-glow);
  
  --emerald: #10B981;
  --emerald-glow: rgba(16, 185, 129, 0.15);
  
  --danger: #F43F5E;
  --danger-glow: rgba(244, 63, 94, 0.15);
  
  --warning: #F59E0B;
  --warning-glow: rgba(245, 158, 11, 0.15);
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode Override */
.light-mode {
  --bg-primary: #F3F5F8;
  --bg-secondary: #FFFFFF;
  --bg-panel: rgba(255, 255, 255, 0.85);
  --bg-active: #E5E7EB;
  --bg-top-bar: rgba(255, 255, 255, 0.85);
  
  --border-color: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(207, 16, 45, 0.4);
  
  --text-primary: #1F2937;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  
  --electric-glow: rgba(207, 16, 45, 0.1);
  --emerald-glow: rgba(16, 185, 129, 0.1);
  --danger-glow: rgba(244, 63, 94, 0.1);
  --warning-glow: rgba(245, 158, 11, 0.1);
}

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

body {
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  height: 100vh;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* App Shell Structure */
.app-shell {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* Sidebar styling */
.sidebar {
  width: 260px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 10;
}

.brand {
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background-color: var(--electric-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 1px;
}

.brand-subtitle {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.nav-menu {
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
  overflow-y: auto;
}

.nav-item, .nav-item-help {
  background: none;
  border: none;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: left;
}

.nav-item:hover, .nav-item-help:hover {
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--text-primary);
}

.nav-item.active {
  background-color: var(--electric-glow);
  color: var(--electric);
  box-shadow: inset 3px 0 0 var(--electric);
  font-weight: 600;
}

.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer-status {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-indicator.online {
  background-color: var(--emerald);
  box-shadow: 0 0 8px var(--emerald);
}

/* Main Content styling */
.main-content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Top bar styling */
.top-bar {
  background-color: var(--bg-top-bar);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(12px);
  flex-shrink: 0;
}

.page-info h1 {
  font-size: 1.5rem;
  font-weight: 700;
}

.page-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.ess-quick-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 6px 16px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
}

.ess-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.ess-value {
  font-weight: 600;
  font-size: 0.9rem;
}

/* Panels styling */
.tab-container {
  padding: 32px;
  overflow-y: auto;
  flex-grow: 1;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.panel {
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  backdrop-filter: blur(16px);
  margin-bottom: 24px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.panel-header i {
  font-size: 1.25rem;
}

.panel-header h2 {
  font-size: 1.15rem;
  font-weight: 600;
}

/* Grid system */
.grid {
  display: grid;
  gap: 24px;
}

.grid-2-cols {
  grid-template-columns: 1fr 1fr;
}

.grid-1-3-cols {
  grid-template-columns: 1fr 2fr;
}

.grid-responsive {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.gap-4 { gap: 16px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-1 { margin-bottom: 4px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.my-3 { margin-top: 12px; margin-bottom: 12px; }
.my-4 { margin-top: 16px; margin-bottom: 16px; }
.py-3 { padding-top: 12px; padding-bottom: 12px; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.flex-center-vertical { display: flex; flex-direction: column; justify-content: center; }
.flex-between { display: flex; flex-direction: column; justify-content: space-between; }
.scrollable-y { overflow-y: auto; }
.max-height-600 { max-height: 600px; }

/* Colors */
.text-electric { color: var(--electric); }
.text-emerald { color: var(--emerald); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.bg-dark { background-color: rgba(7, 10, 19, 0.4); }
.bg-glass { background: rgba(255, 255, 255, 0.02); }

/* Forms & Inputs */
.form-group-row {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}

.form-group {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-group label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input, 
.form-group select {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 10px 14px;
  font-size: 0.95rem;
  font-family: inherit;
  font-weight: 500;
  outline: none;
  transition: var(--transition-fast);
}

.form-group input:focus, 
.form-group select:focus {
  border-color: var(--electric);
  box-shadow: 0 0 0 3px var(--electric-glow);
}

.divider {
  height: 1px;
  background-color: var(--border-color);
  margin: 16px 0;
}

/* Custom Buttons */
.btn {
  background: none;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition-fast);
}

.btn-primary {
  background-color: var(--electric);
  color: #fff;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background-color: #2563eb;
  transform: translateY(-1px);
}

.btn-emerald {
  background-color: var(--emerald);
  color: #fff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-emerald:hover {
  background-color: #059669;
  transform: translateY(-1px);
}

.btn-electric {
  background-color: var(--electric-glow);
  color: var(--electric);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.btn-electric:hover {
  background-color: rgba(59, 130, 246, 0.25);
}

.btn-outline {
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.01);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.03);
  border-color: var(--text-secondary);
}

.btn-tab {
  padding: 6px 12px;
  font-size: 0.8rem;
  border-radius: 4px;
}

.btn-tab.active {
  background-color: var(--electric);
  color: white;
  border-color: var(--electric);
}

.w-100 { width: 100%; }

/* Alerts and Badges */
.alert {
  display: flex;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-bottom: 16px;
  border: 1px solid transparent;
  align-items: flex-start;
}

.alert-danger {
  background-color: var(--danger-glow);
  border-color: rgba(244, 63, 94, 0.2);
  color: #fda4af;
}

.alert-info {
  background-color: var(--electric-glow);
  border-color: rgba(59, 130, 246, 0.2);
  color: #93c5fd;
}

.alert-warning {
  background-color: var(--warning-glow);
  border-color: rgba(245, 158, 11, 0.2);
  color: #fde047;
}

/* Sizing Dashboard widgets */
.sizing-ess-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.summary-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0.01) 100%);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.card-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.card-val {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.card-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.stat-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px 16px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.stat-value {
  font-weight: 700;
  font-size: 1.15rem;
}

/* Visual Pack Schematic styling */
.visual-pack-container {
  background-color: rgba(7, 10, 19, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
}

#visual-pack-svg {
  width: 100%;
  max-height: 120px;
}

.svg-cell {
  fill: var(--bg-secondary);
  stroke: var(--border-color);
  stroke-width: 1px;
  rx: 3px;
  transition: var(--transition-fast);
}

.svg-cell.active {
  fill: var(--electric-glow);
  stroke: var(--electric);
  stroke-width: 1.5px;
}

.svg-bus {
  stroke: var(--warning);
  stroke-width: 2.5px;
  fill: none;
}

.svg-text {
  font-family: inherit;
  font-size: 8px;
  fill: var(--text-secondary);
  text-anchor: middle;
}

/* Custom sliders */
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-secondary);
  outline: none;
  margin: 8px 0;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--electric);
  cursor: pointer;
  box-shadow: 0 0 8px var(--electric);
  transition: var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.slider-val {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--electric);
}

/* Connectivity tab charts/progress bar */
.progress-bar-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.progress-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.progress-track {
  background-color: var(--bg-secondary);
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  width: 100%;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.4s ease-out;
  width: 0%;
}

.fill-emerald { background-color: var(--emerald); box-shadow: 0 0 8px var(--emerald); }
.fill-warning { background-color: var(--warning); box-shadow: 0 0 8px var(--warning); }
.fill-electric { background-color: var(--electric); box-shadow: 0 0 8px var(--electric); }

/* Thermal gauge container */
.therm-gauge-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.therm-value {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1;
}

.therm-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 6px;
  font-weight: 500;
}

/* Mission Profile Table styling */
.mission-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}

.mission-table th,
.mission-table td {
  padding: 6px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.mission-table th {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-weight: 600;
}

.mission-table td input {
  width: 100%;
  padding: 6px 10px !important;
  font-size: 0.85rem !important;
  background-color: var(--bg-secondary) !important;
  border: 1px solid var(--border-color) !important;
  margin: 0 !important;
  border-radius: 4px !important;
  color: var(--text-primary) !important;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.mission-table td input:focus {
  border-color: var(--electric) !important;
}

.mission-table tr:hover {
  background-color: rgba(255, 255, 255, 0.01);
}

.duration-share-bar {
  background: rgba(255, 255, 255, 0.01);
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

/* Toggle Switch Styles */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 22px;
}

.switch input { 
  opacity: 0;
  width: 0;
  height: 0;
}

.slider-switch {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  transition: .3s;
}

.slider-switch:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-secondary);
  transition: .3s;
}

input:checked + .slider-switch {
  background-color: var(--electric-glow);
  border-color: var(--electric);
}

input:checked + .slider-switch:before {
  transform: translateX(22px);
  background-color: var(--electric);
  box-shadow: 0 0 6px var(--electric);
}

.slider-switch.round {
  border-radius: 22px;
}

.slider-switch.round:before {
  border-radius: 50%;
}

.eol-toggle-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.switch-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Time Waveforms curve area */
.curve-header-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
  margin-bottom: 16px;
}

.curve-toggles {
  display: flex;
  gap: 8px;
}

.legend-color-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 4px;
}

.dot-std { background-color: var(--electric); }
.dot-eol { background-color: var(--danger); }

/* Drag and Drop Zone */
.drop-zone {
  border: 2px dashed rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  background-color: rgba(255, 255, 255, 0.005);
}

.drop-zone:hover, 
.drop-zone.dragover {
  border-color: var(--emerald);
  background-color: var(--emerald-glow);
}

.drop-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.drop-subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.hidden-file-input {
  display: none;
}

.manual-paste-import textarea {
  width: 100%;
  height: 80px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 10px 14px;
  font-size: 0.85rem;
  font-family: 'JetBrains Mono', monospace;
  outline: none;
  resize: none;
  margin-top: 6px;
  transition: var(--transition-fast);
}

.manual-paste-import textarea:focus {
  border-color: var(--emerald);
}

/* Action grid */
.action-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Utility helpers */
.hidden { display: none !important; }

/* Short disclaimer styling */
.disclaimer-text {
  font-size: 0.725rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-top: 14px;
  margin-bottom: 20px;
  font-style: italic;
  text-align: left;
  border-left: 2.5px solid rgba(255, 255, 255, 0.15);
  padding-left: 10px;
}

/* Responsive Adjustments */
@media (max-width: 1024px) {
  .app-shell {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .nav-menu {
    flex-direction: row;
    padding: 12px;
    gap: 4px;
    overflow-x: auto;
  }
  .nav-item span, .nav-item-help span {
    display: none;
  }
  .nav-item, .nav-item-help {
    padding: 10px;
  }
  .top-bar {
    padding: 16px 20px;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .tab-container {
    padding: 20px;
  }
  .grid-2-cols,
  .grid-1-3-cols {
    grid-template-columns: 1fr;
  }
}