:root {
  --bg: #201f1c;
  --panel: #29271f;
  --panel-2: #322f26;
  --line: #4a4536;
  --grid-line: rgba(196, 178, 138, 0.08);
  --ink: #e9e2d2;
  --ink-dim: #a89f8a;
  --accent-source: #7fae6a;
  --accent-storage: #a89f8a;
  --accent-converter: #d9a441;
  --accent-consumer: #c15a4e;
  --edge-color: #8a8a8a;
  --danger: #c15a4e;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --display: 'Space Grotesk', ui-sans-serif, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body,
#root {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 10pt;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ---------------------------------------------------------- top bar --- */

.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
}

.topbar__title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 150%;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0;
  border-right: 1px solid var(--line);
  padding-right: 16px;
}

.topbar__title span {
  display: block;
  font-family: var(--mono);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--ink-dim);
  text-transform: none;
  margin-top: 2px;
}

.tick-counter {
  font-family: var(--mono);
  color: var(--ink-dim);
  background: var(--panel-2);
  border: 1px solid var(--line);
  padding: 6px 12px;
  border-radius: 3px;
}

.tick-counter b {
  color: var(--accent-converter);
}

.spacer {
  flex: 1;
}

.btn {
  font-family: var(--mono);
  font-weight: 500;
  letter-spacing: 0.03em;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--ink);
  padding: 9px 16px;
  border-radius: 3px;
  cursor: pointer;
  transition: border-color 0.12s, transform 0.05s;
}

.btn:hover {
  border-color: var(--ink-dim);
}

.btn:active {
  transform: translateY(1px);
}

.btn:focus-visible {
  outline: 2px solid var(--accent-converter);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--accent-converter);
  border-color: var(--accent-converter);
  color: #201f1c;
  font-weight: 600;
}

.btn--primary:hover {
  border-color: #f0c169;
}

.btn--danger {
  background: transparent;
  border-color: var(--danger);
  color: var(--danger);
  margin-top: 14px;
  width: 100%;
}

.btn--danger:hover {
  background: rgba(193, 90, 78, 0.12);
}

.btn--ghost {
  background: transparent;
  border-style: dashed;
  color: var(--ink-dim);
  width: 100%;
  margin-top: 4px;
}

.btn--icon {
  padding: 4px 8px;
}

select {
  font-family: var(--mono);
  background: var(--panel-2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 8px 10px;
}

/* --------------------------------------------------------------- main --- */

.main {
  flex: 1;
  display: flex;
  min-height: 0;
}

/* ------------------------------------------------------------- world --- */

.world-wrap {
  flex: 1;
  overflow: auto;
  position: relative;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
}

#world {
  position: relative;
  width: 1600px;
  height: 900px;
}

#world>svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 1600px;
  height: 900px;
  pointer-events: none;
}

#world>svg line {
  pointer-events: stroke;
}

.node {
  position: absolute;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent-storage);
  border-radius: 4px;
  padding: 0.25em 0.5em;
  cursor: grab;
  user-select: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
  touch-action: none;
  display: flex;
  flex-direction: column;
  gap: 0.25em;
}

.node:active {
  cursor: grabbing;
}

.node.is-selected {
  border-left-width: 4px;
  outline: 1.5px dashed var(--ink);
  outline-offset: 3px;
}

.node--source {
  border-left-color: var(--accent-source);
}

.node--storage {
  border-left-color: var(--accent-storage);
}

.node--converter {
  border-left-color: var(--accent-converter);
}

.node--consumer {
  border-left-color: var(--accent-consumer);
}

.unit__id {
  font-family: var(--display);
  font-weight: 200;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.unit__title {
  font-family: var(--display);
  font-weight: 600;
  font-size: 125%;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.unit__kind {
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.unit__resources {
  background: #171613;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 4px 6px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.unit__links {
  background: #171613;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 4px 6px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.unit__converter__progress {
  font-size: 75%;
  background: #171613;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 6px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  min-height: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.unit__converter__progress_bar {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(90deg, var(--accent-converter), #f0c169);
  opacity: 0.3;
  transition: width 0.15s ease-out;
}

.unit__converter__progress_info {
  position: relative;
  z-index: 2;
  color: var(--ink);
}

.unit__sockets {
  position: absolute;
  top: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.unit__sockets--input {
  left: -5px;
}

.unit__sockets--output {
  right: -5px;
}

.unit__socket {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--panel);
  box-shadow: 0 0 0 1px var(--edge-color);
}

/* ------------------------------------------------------------ sidebar --- */

.sidebar {
  width: 340px;
  flex-shrink: 0;
  background: var(--panel);
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar__section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.sidebar__section--grow {
  flex: 1;
  border-bottom: none;
}

.sidebar__section h4 {
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0 0 8px;
}

.sidebar__list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 140px;
  overflow-y: auto;
}

.sidebar__list li {
  padding: 6px 8px;
  font-size: 11.5px;
  border-radius: 3px;
  cursor: pointer;
  color: var(--ink-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__list li:hover {
  background: var(--panel-2);
  color: var(--ink);
}

.sidebar__list li.is-active {
  background: var(--panel-2);
  color: var(--accent-converter);
}

#sidebar-content {
  padding: 16px 0 0;
  flex: 1;
  overflow-y: auto;
}

#sidebar-content h3 {
  font-family: var(--display);
  font-size: 13px;
  color: var(--ink);
  margin: 0 0 14px;
  word-break: break-all;
}

.hint {
  color: var(--ink-dim);
  font-size: 11.5px;
  line-height: 1.5;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 12px;
  font-size: 11px;
  color: var(--ink-dim);
}

.field input,
.field select {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--panel-2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 7px 9px;
  width: 100%;
}

.field input:focus-visible,
.field select:focus-visible {
  outline: 2px solid var(--accent-converter);
  outline-offset: 1px;
}

.coord-row {
  display: flex;
  gap: 8px;
}

.coord-row input {
  width: 50%;
}

.recipe-box {
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 10px;
  margin-bottom: 12px;
  background: var(--panel-2);
}

.recipe-box__title {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-dim);
  margin-bottom: 8px;
}

.recipe-row {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
  align-items: center;
}

.recipe-row select {
  flex: 1.4;
}

.recipe-row input {
  flex: 1;
}

::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 5px;
}