/* style.css — PyPSA Network Drawer */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
  --bg: #f5f5f7;
  --bg-surface: rgba(255, 255, 255, 0.72);
  --bg-elevated: rgba(255, 255, 255, 0.85);
  --bg-blur: saturate(180%) blur(20px);
  --border: rgba(0, 0, 0, 0.1);
  --border-strong: rgba(0, 0, 0, 0.18);
  --text: #1d1d1f;
  --text-dim: #6e6e73;
  --text-muted: #aeaeb2;
  --accent: #0071e3;
  --accent-light: rgba(0, 113, 227, 0.08);
  --danger: #ff3b30;
  --canvas-bg: #ffffff;
  --schematic: #1d1d1f;
  --radius: 10px;
  --radius-sm: 6px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --sidebar-w: 190px;
  --propbar-w: 270px;
  --toolbar-h: 44px;
  --code-h: 280px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* === LAYOUT === */
#app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--propbar-w);
  grid-template-rows: var(--toolbar-h) 1fr;
  grid-template-areas:
    "toolbar toolbar toolbar"
    "sidebar canvas propbar";
  height: 100vh;
  width: 100vw;
}

/* === TOOLBAR === */
#toolbar {
  grid-area: toolbar;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  background: var(--bg-surface);
  backdrop-filter: var(--bg-blur);
  -webkit-backdrop-filter: var(--bg-blur);
  border-bottom: 1px solid var(--border);
  z-index: 20;
}

.toolbar-brand {
  font-weight: 700;
  font-size: 14px;
  color: var(--text);
  margin-right: 12px;
  letter-spacing: -0.3px;
  white-space: nowrap;
}

.toolbar-brand span {
  color: var(--text-dim);
  font-weight: 400;
}

.toolbar-sep {
  width: 1px;
  height: 22px;
  background: var(--border);
  margin: 0 6px;
}

.toolbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.toolbar-btn:hover {
  background: #fff;
  color: var(--text);
  border-color: var(--border-strong);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.toolbar-btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.toolbar-btn.primary:hover {
  filter: brightness(1.08);
}

.toolbar-spacer {
  flex: 1;
}

#comp-count {
  font-size: 11px;
  color: var(--text-muted);
  margin-right: 8px;
}

/* === SIDEBAR / PALETTE === */
#sidebar {
  grid-area: sidebar;
  background: var(--bg-surface);
  backdrop-filter: var(--bg-blur);
  -webkit-backdrop-filter: var(--bg-blur);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 10px 6px;
  z-index: 10;
}

.palette-category {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-muted);
  font-weight: 600;
  padding: 10px 8px 4px;
  margin-top: 2px;
}

.palette-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  height: 34px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text);
  font-family: var(--font);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.12s;
  text-align: left;
}

.palette-item:hover {
  background: rgba(0, 0, 0, 0.04);
  border-color: var(--border);
}

.palette-item.active {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

.palette-icon {
  font-size: 13px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
  color: var(--text-dim);
  font-family: var(--mono);
}

.palette-item.active .palette-icon {
  color: var(--accent);
}

.palette-label {
  font-size: 12px;
  font-weight: 500;
}

/* === SVG CANVAS === */
#canvas-area {
  grid-area: canvas;
  position: relative;
  overflow: hidden;
  background: var(--canvas-bg);
}

#svg-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.component-group {
  cursor: pointer;
}

.component-group:hover .sel-ring {
  opacity: 0.4 !important;
}

.component-group.selected .sel-ring {
  opacity: 0.7 !important;
  animation: sel-pulse 2s ease-in-out infinite;
}

@keyframes sel-pulse {

  0%,
  100% {
    opacity: 0.5;
  }

  50% {
    opacity: 0.8;
  }
}

.hit-area {
  cursor: pointer;
}

.connection line {
  pointer-events: none;
}

/* Canvas hint overlay */
#canvas-hint {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-surface);
  backdrop-filter: var(--bg-blur);
  -webkit-backdrop-filter: var(--bg-blur);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
  font-size: 11px;
  color: var(--text-dim);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
  z-index: 5;
}

#canvas-hint.visible {
  opacity: 1;
}

/* === PROPERTY PANEL === */
#prop-panel {
  grid-area: propbar;
  background: var(--bg-surface);
  backdrop-filter: var(--bg-blur);
  -webkit-backdrop-filter: var(--bg-blur);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 0;
  z-index: 10;
}

.prop-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 300px;
  color: var(--text-muted);
  font-size: 12px;
  gap: 10px;
  text-align: center;
  padding: 20px;
}

.prop-empty-icon {
  font-size: 24px;
  opacity: 0.3;
  color: var(--text-dim);
}

.prop-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg-surface);
  backdrop-filter: var(--bg-blur);
  -webkit-backdrop-filter: var(--bg-blur);
  z-index: 2;
}

.prop-type-badge {
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 6px;
  border-radius: 3px;
  flex-shrink: 0;
  background: rgba(0, 0, 0, 0.06);
  color: var(--text-dim);
}

.prop-name {
  font-size: 13px;
  font-weight: 600;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.prop-delete-btn {
  width: 24px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  flex-shrink: 0;
}

.prop-delete-btn:hover {
  border-color: var(--danger);
  color: var(--danger);
  background: rgba(255, 59, 48, 0.06);
}

.prop-fields {
  padding: 6px 12px;
}

.prop-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.prop-label {
  font-size: 10px;
  color: var(--text-dim);
  width: 105px;
  flex-shrink: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.prop-input {
  flex: 1;
  height: 26px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  font-family: var(--mono);
  font-size: 11px;
  padding: 0 6px;
  outline: none;
  transition: border-color 0.15s;
  min-width: 0;
}

.prop-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

.prop-select {
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236e6e73' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
  padding-right: 22px;
}

.prop-toggle {
  position: relative;
  width: 36px;
  height: 20px;
  cursor: pointer;
  flex-shrink: 0;
}

.prop-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.prop-toggle-slider {
  position: absolute;
  inset: 0;
  background: #e5e5ea;
  border-radius: 12px;
  transition: all 0.2s;
}

.prop-toggle-slider::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  left: 2px;
  top: 2px;
  background: #fff;
  border-radius: 50%;
  transition: all 0.2s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.prop-toggle input:checked+.prop-toggle-slider {
  background: var(--accent);
}

.prop-toggle input:checked+.prop-toggle-slider::after {
  transform: translateX(16px);
}

.prop-actions {
  padding: 10px 12px;
  border-top: 1px solid var(--border);
}

.prop-action-btn {
  width: 100%;
  height: 30px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  font-family: var(--font);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.prop-action-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

/* === CODE PANEL === */
#code-panel {
  position: fixed;
  bottom: 0;
  left: var(--sidebar-w);
  right: var(--propbar-w);
  height: 0;
  background: var(--bg-surface);
  backdrop-filter: var(--bg-blur);
  -webkit-backdrop-filter: var(--bg-blur);
  border-top: 1px solid var(--border);
  z-index: 15;
  transition: height 0.25s ease;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#code-panel.open {
  height: var(--code-h);
}

#code-resize-handle {
  height: 6px;
  cursor: ns-resize;
  background: transparent;
  position: relative;
  flex-shrink: 0;
}

#code-resize-handle::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 2px;
  transform: translateX(-50%);
  width: 36px;
  height: 3px;
  background: rgba(0, 0, 0, 0.12);
  border-radius: 2px;
}

#code-resize-handle:hover::after {
  background: rgba(0, 0, 0, 0.25);
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.code-header-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}

.code-body {
  flex: 1;
  overflow: auto;
  padding: 12px 16px;
  background: #fafafa;
}

#code-output {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--text);
  white-space: pre;
  tab-size: 4;
  margin: 0;
}

/* === SCROLLBAR === */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.25);
}

/* === SELECTION === */
::selection {
  background: var(--accent);
  color: #fff;
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  :root {
    --sidebar-w: 150px;
    --propbar-w: 230px;
  }
}

/* === MODAL === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--bg-surface);
  backdrop-filter: var(--bg-blur);
  -webkit-backdrop-filter: var(--bg-blur);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  width: 600px;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  transform: translateY(20px) scale(0.95);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.open .modal-content {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin: 0;
}

.modal-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 250px;
  gap: 12px;
}

.modal-hint {
  font-size: 12px;
  color: var(--text-dim);
}

.modal-hint code {
  font-family: var(--mono);
  background: rgba(0, 0, 0, 0.06);
  padding: 2px 4px;
  border-radius: 4px;
}

#import-textarea {
  flex: 1;
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 12px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--text);
  resize: vertical;
  min-height: 200px;
  outline: none;
}

#import-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
}