/* ============================================
   FTTH Simulator — Layout
   Grid structure & Responsive behavior
   ============================================ */

.app-container {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  grid-template-rows: var(--header-height) 1fr var(--statusbar-height);
  grid-template-areas:
    "header header"
    "sidebar canvas"
    "sidebar statusbar";
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ---------- Header ---------- */
.app-header {
  grid-area: header;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-4);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-default);
  z-index: var(--z-sidebar);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.brand-logo {
  color: var(--accent-teal);
  display: flex;
  align-items: center;
}

.brand-logo svg {
  width: 24px;
  height: 24px;
}

.brand-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.mode-selector {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.mode-selector label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.action-divider {
  width: 1px;
  height: 18px;
  background: var(--border-default);
  margin: 0 var(--sp-2);
}

/* ---------- Sidebar ---------- */
.app-sidebar {
  grid-area: sidebar;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-default);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sidebar);
  overflow-y: auto;
}

/* ---------- Canvas Area ---------- */
.app-canvas-area {
  grid-area: canvas;
  position: relative;
  background: var(--bg-primary);
  overflow: hidden;
}

/* ---------- Status Bar ---------- */
.app-statusbar {
  grid-area: statusbar;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  padding: 0 var(--sp-4);
  z-index: var(--z-sidebar);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  min-width: 0;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
  margin-left: var(--sp-4);
}

.zoom-controls input[type="range"] {
  width: 100px;
  height: 4px;
}

/* ---------- Status Bar Segments ---------- */
#status-bar-text {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
  -ms-overflow-style: none;
  min-width: 0;
}

#status-bar-text::-webkit-scrollbar {
  display: none;
}

.sb-segment {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 var(--sp-2);
  color: var(--text-secondary);
  font-size: 11px;
  letter-spacing: 0.01em;
}

.sb-icon {
  font-size: 12px;
  line-height: 1;
}

.sb-val {
  font-weight: 600;
  font-family: var(--font-mono);
}

.sb-dim {
  color: var(--text-muted);
  font-size: 10px;
}

.sb-badge {
  font-weight: 700;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 1px 5px;
  border-radius: var(--radius-sm);
  background: var(--bg-hover);
}

.sb-badge.text-success {
  background: rgba(52, 211, 153, 0.12);
}

.sb-badge.text-warning {
  background: rgba(251, 191, 36, 0.12);
}

.sb-badge.text-danger {
  background: rgba(248, 113, 113, 0.15);
}

.sb-divider {
  color: var(--border-default);
  margin: 0 2px;
  font-size: 13px;
  user-select: none;
  opacity: 0.5;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .app-container {
    grid-template-columns: 1fr;
    grid-template-rows: var(--header-height) 200px 1fr var(--statusbar-height);
    grid-template-areas:
      "header"
      "sidebar"
      "canvas"
      "statusbar";
  }

  .app-sidebar {
    height: 120px;
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    border-right: none;
    border-bottom: 1px solid var(--border-default);
  }

  .mode-selector {
    display: none;
  }
}

/* ---------- Print Styles ---------- */
@media print {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  @page {
    margin: 0.8cm;
    size: A4 landscape; /* Print as Landscape */
  }
  
  body {
    background: #fff !important;
    color: #1e293b !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
  
  .app-container {
    display: none !important;
  }
  
  #print-area {
    display: block !important;
    position: static;
    width: 100%;
    font-family: Arial, sans-serif;
    page-break-inside: avoid !important;
    break-inside: avoid !important;
  }

  /* Professional Header - Compact */
  .print-header {
    border-bottom: 2px solid #1e293b;
    padding-bottom: 6px;
    margin-bottom: 12px;
  }
  
  .print-header h1 {
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: #0f172a;
    margin: 0 0 4px 0;
  }
  
  .print-meta-grid {
    display: flex;
    justify-content: space-between;
    font-size: 10px;
    color: #475569;
  }

  /* Section styling - Compact */
  .print-section {
    margin-bottom: 12px;
  }
  
  .print-section h2 {
    font-size: 11px;
    font-weight: 700;
    color: #0f172a;
    border-left: 3px solid #00a886;
    padding-left: 6px;
    margin: 0 0 6px 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  /* Table - Compact, scalable text */
  .print-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0;
    font-size: 9px;
  }
  .print-table th, .print-table td {
    border: 1px solid #cbd5e1 !important;
    padding: 4px 6px !important;
    text-align: left;
    color: #334155;
  }
  .print-table th {
    background: #f8fafc !important;
    font-weight: 700;
    color: #0f172a;
  }

  /* Diagram & Grid background */
  #print-diagram-container {
    border: 1.5px solid #cbd5e1 !important;
    background: #ffffff !important;
    border-radius: 6px;
    overflow: hidden;
    position: relative;
    box-shadow: none !important;
    margin-bottom: 8px;
  }
  
  #print-diagram-container .canvas-inner {
    background-size: 20px 20px !important;
    background-image: 
      linear-gradient(to right, rgba(0, 0, 0, 0.04) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(0, 0, 0, 0.04) 1px, transparent 1px) !important;
  }
  
  #print-diagram-container .eq-node {
    background: #ffffff !important;
    border: 2px solid #64748b !important;
    color: #1e293b !important;
    border-radius: 6px;
  }
  
  #print-diagram-container .eq-node[data-category="active"] {
    border-color: #00a886 !important;
  }
  
  #print-diagram-container .eq-node[data-category="passive"] {
    border-color: #4f46e5 !important;
  }

  #print-diagram-container .eq-node-header {
    border-bottom: 1px solid #e2e8f0 !important;
    background: #f8fafc !important;
    padding: 4px 6px !important;
  }
  
  #print-diagram-container .eq-node[data-category="active"] .eq-node-header {
    background: rgba(0, 212, 170, 0.08) !important;
  }

  #print-diagram-container .eq-node[data-category="passive"] .eq-node-header {
    background: rgba(99, 102, 241, 0.08) !important;
  }

  #print-diagram-container .eq-node-name {
    color: #0f172a !important;
    font-weight: 700 !important;
  }
  
  #print-diagram-container .eq-node[data-category="active"] .eq-node-icon {
    color: #00a886 !important;
  }
  
  #print-diagram-container .eq-node[data-category="passive"] .eq-node-icon {
    color: #4f46e5 !important;
  }
  
  #print-diagram-container .eq-node-value {
    color: #475569 !important;
    font-weight: 600 !important;
  }

  #print-diagram-container .port {
    background: #ffffff !important;
    border: 2px solid #64748b !important;
  }

  #print-diagram-container .port.connected {
    background: #10b981 !important;
    border-color: #059669 !important;
  }

  #print-diagram-container .connections-layer {
    position: absolute;
    top: 0;
    left: 0;
    overflow: visible !important;
  }

  /* Connection Lines */
  #print-diagram-container .connection-path {
    stroke-width: 2.5px !important;
    fill: none !important;
  }
  
  #print-diagram-container .connection-path[data-signal="good"] { 
    stroke: #16a34a !important; 
  }
  #print-diagram-container .connection-path[data-signal="warning"] { 
    stroke: #d97706 !important; 
  }
  #print-diagram-container .connection-path[data-signal="critical"] { 
    stroke: #dc2626 !important; 
  }
  #print-diagram-container .connection-path:not([data-signal]) {
    stroke: #64748b !important; 
  }

  /* Legend - Compact */
  .print-legend {
    margin-top: 8px;
    display: flex;
    align-items: center;
    font-size: 9px;
    border-top: 1px dashed #cbd5e1;
    padding-top: 8px;
  }
  
  .legend-title {
    font-weight: 700;
    margin-right: 15px;
    color: #0f172a;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  
  .legend-items {
    display: flex;
    gap: 15px;
  }
  
  .legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
    color: #475569;
  }
  
  .legend-color {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 2px;
  }
  
  .legend-color.line-good {
    background: #16a34a;
    height: 3px;
    width: 16px;
  }
  
  .legend-color.line-warning {
    background: #d97706;
    height: 3px;
    width: 16px;
  }
  
  .legend-color.line-critical {
    background: #dc2626;
    height: 3px;
    width: 16px;
  }
  
  .legend-color.node-active {
    border: 1.5px solid #00a886;
    background: rgba(0, 212, 170, 0.08);
  }
  
  .legend-color.node-passive {
    border: 1.5px solid #4f46e5;
    background: rgba(99, 102, 241, 0.08);
  }
}