:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #5f6b7a;
  --line: #d8dee8;
  --accent: #1768ac;
  --accent-soft: #e8f2fb;
  --danger: #b42318;
  --shadow: 0 1px 2px rgba(22, 30, 46, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.topbar h1 {
  margin: 0;
  font-size: 28px;
  line-height: 1.1;
}

.topbar p {
  margin: 6px 0 0;
  color: var(--muted);
}

.topbar a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.drop-zone {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 116px;
  padding: 22px;
  border: 1px dashed #9ba8b8;
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.drop-zone.dragging {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.drop-zone input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-zone strong,
.drop-zone span {
  display: block;
}

.drop-zone strong {
  font-size: 18px;
}

.drop-zone span {
  margin-top: 4px;
  color: var(--muted);
}

.status {
  min-height: 40px;
  margin: 14px 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--muted);
}

.status.error {
  border-color: #f0b8b0;
  background: #fff3f1;
  color: var(--danger);
}

.tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.tab {
  min-height: 38px;
  padding: 0 14px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.tab.active {
  border-bottom-color: var(--accent);
  color: var(--text);
  font-weight: 600;
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.metric,
.section,
.list-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.metric {
  padding: 14px;
}

.metric .label {
  display: block;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.metric .value {
  display: block;
  margin-top: 4px;
  font-size: 22px;
  font-weight: 700;
}

.section {
  margin-bottom: 12px;
  padding: 16px;
}

.section h2,
.section h3 {
  margin: 0 0 10px;
  font-size: 17px;
}

.details {
  display: grid;
  grid-template-columns: minmax(140px, 0.4fr) 1fr;
  gap: 8px 16px;
}

.details dt {
  color: var(--muted);
}

.details dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.list {
  display: grid;
  gap: 10px;
}

.list-item {
  padding: 14px;
}

.list-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.data-table {
  width: 100%;
  min-width: 940px;
  border-collapse: collapse;
  background: var(--panel);
}

.data-table.is-compact {
  min-width: 280px;
}

.data-table th,
.data-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: #f1f4f8;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.data-table td {
  font-size: 13px;
  overflow-wrap: anywhere;
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.muted {
  color: var(--muted);
}

.warning {
  color: #8a4b00;
}

.program-layout {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.program-sidebar {
  position: sticky;
  top: 12px;
  display: grid;
  gap: 6px;
  max-height: calc(100vh - 24px);
  overflow: auto;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.program-button {
  display: block;
  width: 100%;
  padding: 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.program-button:hover,
.program-button.active {
  border-color: #b8cbe0;
  background: var(--accent-soft);
}

.program-button span,
.program-button small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.program-button span {
  font-weight: 650;
}

.program-button small {
  margin-top: 2px;
  color: var(--muted);
}

.program-detail {
  min-width: 0;
}

.ladder-viewer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.ladder-meta {
  color: var(--muted);
}

.ladder-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #253044;
  font-size: 13px;
  white-space: nowrap;
}

.ladder-toggle input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--accent);
}

.ladder-toggle.is-disabled {
  color: var(--muted);
}

.ladder-scroll {
  overflow: auto;
  max-height: 68vh;
  border: 1px solid var(--line);
  border-radius: 6px;
  background:
    linear-gradient(#eef2f6 1px, transparent 1px),
    linear-gradient(90deg, #eef2f6 1px, transparent 1px),
    #ffffff;
  background-size: 32px 24px;
}

.ladder-table {
  width: max-content;
  min-width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
}

.ladder-table th,
.ladder-table td {
  min-width: 116px;
  height: 58px;
  padding: 4px 7px;
  border-right: 1px solid #edf1f5;
  border-bottom: 1px solid #edf1f5;
  vertical-align: middle;
}

.ladder-table tbody th {
  position: sticky;
  left: 0;
  z-index: 8;
  min-width: 72px;
  width: 72px;
  background: #e9e5d2;
  box-shadow: 2px 0 0 #20262d;
  color: #4f4f72;
  font-size: 12px;
  font-weight: 500;
  text-align: right;
}

.ladder-rung-comment {
  position: relative;
  z-index: 2;
  min-width: 420px;
  height: 34px;
  padding: 5px 10px;
  background: #f4fbff;
  color: #255f88;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.25;
  text-align: left;
}

.ladder-rung-comment-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ladder-output-comment {
  min-width: 180px;
  width: 220px;
  background: #effaf7;
  border-left: 2px solid #7fb2aa;
  color: #1f6f68;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 12px;
  line-height: 1.25;
}

.ladder-output-comment-text {
  overflow-wrap: anywhere;
}

.ladder-table-cell {
  position: relative;
  background: rgba(255, 255, 255, 0.82);
}

.ladder-table-cell.has-horizontal::before {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  border-top: 2px solid #20262d;
  content: "";
}

.ladder-table-cell.has-vertical::after {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  border-left: 2px solid #20262d;
  content: "";
}

.ladder-table-cell.has-vertical-start::after {
  top: 50%;
  bottom: 0;
}

.ladder-table-cell.has-vertical-end::after {
  top: 0;
  bottom: 50%;
}

.ladder-table-cell.has-vertical-middle::after {
  top: 0;
  bottom: 0;
}

.ladder-table-cell.is-command-part {
  min-width: 86px;
  padding: 0;
  background: #ffffff;
}

.ladder-table-cell.is-command-mnemonic-cell {
  border: 2px solid #59626f;
  border-right-width: 1px;
}

.ladder-table-cell.is-command-operand-cell {
  border-top: 2px solid #59626f;
  border-right: 1px solid #8c96a4;
  border-bottom: 2px solid #59626f;
}

.ladder-table-cell.is-command-last-cell {
  border-right: 2px solid #59626f;
}

.ladder-command-cell-token {
  position: relative;
  z-index: 3;
  display: grid;
  min-height: 28px;
  padding: 6px 10px;
  place-items: center;
  color: #253044;
  font-size: 11px;
  line-height: 1.15;
  text-align: center;
  white-space: nowrap;
}

.ladder-command-cell-token.is-mnemonic {
  min-width: 74px;
  color: #20262d;
  font-weight: 700;
}

.ladder-command-cell-token.is-operand {
  min-width: 82px;
}

.ladder-token {
  position: relative;
  z-index: 3;
  min-width: 74px;
  margin: 0 auto;
  color: #20262d;
  text-align: center;
}

.ladder-token.is-contact,
.ladder-token.is-coil {
  display: grid;
  gap: 1px;
  width: 82px;
  padding: 0 4px;
  background: #ffffff;
}

.ladder-token.is-block {
  display: grid;
  grid-template-columns: minmax(68px, auto) repeat(3, minmax(72px, auto));
  align-items: center;
  min-width: 280px;
  border: 2px solid #59626f;
  background: #ffffff;
}

.ladder-token.is-block.is-zero-operand {
  display: inline-grid;
  grid-template-columns: minmax(96px, auto);
  min-width: 110px;
}

.ladder-token.is-block.is-zero-operand .ladder-token-mnemonic {
  border-right: 0;
}

.ladder-token.is-comment {
  display: block;
  min-width: 120px;
  color: #2d8a83;
  text-align: left;
}

.ladder-token.is-unknown {
  display: grid;
  gap: 1px;
  width: 112px;
  padding: 4px 6px;
  border: 1px solid #c98218;
  background: #fff7e6;
  color: #6f3d00;
  text-align: left;
}

.unknown-marker,
.unknown-offset {
  font-weight: 700;
  line-height: 1.1;
}

.unknown-bytes {
  overflow: hidden;
  color: #8a4b00;
  font-size: 10px;
  line-height: 1.15;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ladder-token-symbol {
  color: #20262d;
  font-size: 14px;
  font-weight: 800;
  line-height: 1;
}

.ladder-token-label,
.ladder-token-operands {
  overflow: hidden;
  color: #435063;
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ladder-token-label {
  color: #253044;
}

.ladder-token-mnemonic {
  padding: 6px 12px;
  border-right: 1px solid #8c96a4;
  font-weight: 700;
  line-height: 1.15;
}

.ladder-token-operands {
  display: contents;
}

.ladder-token-operands span {
  min-width: 72px;
  padding: 6px 10px;
  border-left: 1px solid #c2cad5;
  color: #253044;
  line-height: 1.15;
}

.ladder-token.is-contact .ladder-token-label,
.ladder-token.is-coil .ladder-token-label {
  color: #253044;
  font-size: 12px;
  line-height: 1.1;
}

.wire-placeholder {
  position: relative;
  z-index: 1;
  color: transparent;
  user-select: none;
}

@media (max-width: 680px) {
  .app-shell {
    width: min(100% - 20px, 1180px);
    padding-top: 16px;
  }

  .topbar {
    display: block;
  }

  .topbar a {
    display: inline-block;
    margin-top: 10px;
  }

  .tabs {
    overflow-x: auto;
  }

  .ladder-viewer-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .program-layout {
    grid-template-columns: 1fr;
  }

  .program-sidebar {
    position: static;
    max-height: 220px;
  }

  .details {
    grid-template-columns: 1fr;
    gap: 3px;
  }
}