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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0f172a;
  color: #e5e7eb;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: stretch;
}

.app {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 1200px;
  height: 100%;
  padding: 12px;
  gap: 8px;
}

header {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 4px;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 4px;
}

.toolbar button {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid #1f2937;
  background: #111827;
  color: #e5e7eb;
  cursor: pointer;
  font-size: 14px;
  transition: transform 0.07s ease, box-shadow 0.07s ease, background 0.07s ease;
}

.toolbar button:hover {
  background: #1f2937;
  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.7);
  transform: translateY(-1px);
}

.toolbar button:active {
  transform: translateY(0);
  box-shadow: none;
}

.toolbar button.active {
  border-color: #22c55e;
  background: #14532d;
}

.main {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 10px;
  flex: 1;
  min-height: 0;
}


#workspace {
  position: relative;
  background: radial-gradient(circle at top, #1f2937 0, #020617 60%);
  border-radius: 18px;
  border: 1px solid #1f2937;
  overflow: hidden;
}

#links-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: auto;
}

.hint {
  position: absolute;
  top: 8px;
  left: 12px;
  font-size: 11px;
  opacity: 0.6;
  pointer-events: none;
}

.device {
  position: absolute;
  min-width: 90px;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid #1f2937;
  background: rgba(15, 23, 42, 0.95);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.6);
  font-size: 12px;
  user-select: none;
  cursor: grab;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.device:active {
  cursor: grabbing;
}

.device-type {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.7;
}

.device-name {
  font-weight: 600;
}

.device-ip {
  font-size: 11px;
  opacity: 0.8;
}

/* Highlight when selected as link source */
.device.link-source {
  outline: 2px dashed #22c55e;
}

/* Right-click context menu */
.context-menu {
  position: absolute;
  background: #020617;
  border-radius: 10px;
  border: 1px solid #1f2937;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.7);
  z-index: 1000;
  min-width: 150px;
  padding: 4px 0;
  font-size: 13px;
}

.context-menu.hidden {
  display: none;
}

.context-menu button {
  width: 100%;
  text-align: left;
  padding: 6px 12px;
  background: transparent;
  border: none;
  color: #e5e7eb;
  cursor: pointer;
  font-size: 13px;
}

.context-menu button:hover {
  background: #111827;
}

/* Details panel */
#details-panel {
  background: #020617;
  border-radius: 18px;
  border: 1px solid #1f2937;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
}

#details-panel.hidden {
  display: none;
}

#details-panel h2 {
  font-size: 15px;
  margin-bottom: 2px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.7;
}

.field input,
.field textarea,
.field select {
  border-radius: 10px;
  border: 1px solid #1f2937;
  background: #020617;
  color: #e5e7eb;
  padding: 6px 8px;
  font-size: 13px;
  resize: vertical;
  min-height: 0;
}

.field textarea {
  min-height: 90px;
  max-height: 220px;
}

.panel-buttons {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 4px;
}

.panel-buttons button {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid #1f2937;
  background: #111827;
  color: #e5e7eb;
  cursor: pointer;
  font-size: 13px;
}

.panel-buttons button.primary {
  border-color: #22c55e;
}

.panel-buttons button.primary:hover {
  background: #16a34a;
}

.panel-buttons button.secondary:hover {
  background: #1f2937;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid #334155;
  font-size: 11px;
  opacity: 0.85;
  align-self: flex-start;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: #22c55e;
}

.no-selection {
  opacity: 0.6;
  font-size: 12px;
  margin-top: 8px;
}

.no-selection.hidden {
  display: none;
}

.small {
  font-size: 11px;
  opacity: 0.7;
}

/* IP validation error */
input.error {
  border-color: #dc2626;
  box-shadow: 0 0 0 1px #dc2626;
}

/* Interfaces UI */
#interfaces-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 4px;
}

.interface-row {
  display: grid;
  gap: 4px;
  align-items: center;
}

.interface-row input,
.interface-row select {
  font-size: 12px;
}

.interface-row button.if-delete {
  border-radius: 999px;
  border: 1px solid #1f2937;
  background: #111827;
  color: #e5e7eb;
  cursor: pointer;
  font-size: 12px;
  padding: 3px 7px;
}

.interface-row button.if-delete:hover {
  background: #1f2937;
}

.small-btn {
  align-self: flex-start;
  margin-bottom: 2px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid #1f2937;
  background: #111827;
  color: #e5e7eb;
  cursor: pointer;
  font-size: 12px;
}

.small-btn:hover {
  background: #1f2937;
}

/* Tooltip for hover info */
.tooltip {
  position: absolute;
  max-width: 260px;
  background: rgba(15, 23, 42, 0.98);
  border-radius: 10px;
  border: 1px solid #1f2937;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.75);
  padding: 8px 10px;
  font-size: 11px;
  pointer-events: none;
  z-index: 999;
}

.tooltip.hidden {
  display: none;
}

.tooltip h4 {
  font-size: 12px;
  margin-bottom: 4px;
}

.tooltip .tooltip-line {
  font-size: 11px;
  opacity: 0.85;
}

.tooltip .tooltip-section {
  margin-top: 4px;
  padding-top: 4px;
  border-top: 1px solid #1f2937;
}

/* Link details panel */
.link-details {
  position: absolute;
  bottom: 8px;
  left: 8px;
  max-width: 340px;
  background: rgba(15, 23, 42, 0.98);
  border-radius: 10px;
  border: 1px solid #1f2937;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.75);
  padding: 8px 10px;
  font-size: 11px;
  z-index: 999;
}

.link-details.hidden {
  display: none;
}

.link-details h4 {
  font-size: 12px;
  margin-bottom: 4px;
}

.link-details .detail-line {
  font-size: 11px;
  opacity: 0.9;
}

/* Delete-link button */
.link-delete-btn {
  margin-top: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid #7f1d1d;
  background: #450a0a;
  color: #fecaca;
  cursor: pointer;
  font-size: 11px;
}

.link-delete-btn:hover {
  background: #7f1d1d;
  border-color: #fecaca;
}

/* Hidden file inputs */
#config-file-input,
#import-file-input {
  display: none;
}