:root {
  color-scheme: dark;
  --bg: #161b20;
  --panel: #20272d;
  --panel-deep: #11171c;
  --line: #35424d;
  --line-hot: #33a7c3;
  --text: #f6f8fb;
  --muted: #9eadb8;
  --accent: #137f99;
  --accent-hover: #1896b5;
  --accent-pressed: #0d5e72;
  --danger: #c84c62;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Arial, sans-serif;
}

.app-shell {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 14px;
}

.app-header {
  margin-bottom: 10px;
}

h1 {
  margin: 0;
  font-size: 25px;
  line-height: 1.15;
}

h2 {
  width: fit-content;
  margin: -28px 0 14px;
  padding: 2px 9px;
  background: #1a2026;
  font-size: 15px;
  line-height: 1.3;
}

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

.workspace {
  display: grid;
  grid-template-columns: minmax(520px, 3fr) minmax(340px, 2fr);
  gap: 10px;
}

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

.panel {
  margin-top: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel);
}

.source-panel {
  margin-top: 0;
}

.drop-zone {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  min-height: 70px;
  padding: 12px;
  border: 1px dashed #4f6573;
  border-radius: 5px;
  background: var(--panel-deep);
}

.drop-zone.drag-over {
  border-color: var(--line-hot);
  background: #13242b;
}

.drop-zone input[type="file"] {
  display: none;
}

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

.drop-zone span,
.panel-note {
  color: var(--muted);
}

.form-grid {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}

label {
  padding: 8px 6px;
  background: var(--panel-deep);
}

input,
select {
  width: 100%;
  min-height: 36px;
  padding: 7px 9px;
  border: 1px solid #42515e;
  border-radius: 5px;
  background: var(--panel-deep);
  color: var(--text);
  font: inherit;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--line-hot);
}

button {
  min-height: 36px;
  padding: 8px 14px;
  border: 1px solid var(--line-hot);
  border-radius: 5px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 120ms ease, transform 80ms ease, border-color 120ms ease;
}

button:hover {
  background: var(--accent-hover);
}

button:active {
  transform: translateY(1px);
  background: var(--accent-pressed);
  border-color: #7cd8ec;
}

.button-row,
.table-tools,
.filter-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.button-row {
  margin-top: 12px;
}

.status-panel {
  min-height: 420px;
  margin-top: 0;
}

#status {
  margin-bottom: 10px;
  font-weight: 700;
}

.log {
  min-height: 320px;
  max-height: 520px;
  overflow: auto;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel-deep);
  color: #cbd6de;
  white-space: pre-wrap;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(4, 8, 12, 0.78);
  backdrop-filter: blur(2px);
}

.editor-panel {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  width: min(96vw, 1500px);
  height: 92vh;
  margin-top: 0;
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.42);
}

.hidden {
  display: none;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.modal-header h2 {
  margin: 0 0 5px;
}

.modal-header span {
  color: var(--muted);
}

.secondary-button {
  background: #22313a;
  border-color: #3c5360;
}

.secondary-button:hover {
  background: #2d4350;
}

.editor-toolbar {
  display: grid;
  gap: 10px;
  margin-bottom: 12px;
}

.filter-tools {
  display: grid;
  grid-template-columns: auto minmax(180px, 260px) minmax(220px, 1fr) auto auto;
}

.table-wrap {
  min-height: 0;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--panel-deep);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  min-width: 130px;
  border: 1px solid #35424d;
  padding: 7px 9px;
  text-align: left;
}

th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #232b32;
  cursor: pointer;
  user-select: none;
}

tr:nth-child(even) td {
  background: #1b242b;
}

td {
  background: var(--panel-deep);
}

td:focus {
  outline: 2px solid var(--line-hot);
  outline-offset: -2px;
}

.selected {
  box-shadow: inset 0 0 0 2px var(--line-hot);
}

tr.selected-row td {
  background: rgba(19, 127, 153, 0.34);
  box-shadow: inset 0 1px 0 rgba(124, 216, 236, 0.45), inset 0 -1px 0 rgba(124, 216, 236, 0.25);
}

th.selected-column,
td.selected-column {
  background: rgba(200, 76, 98, 0.38);
}

th.selected-column {
  box-shadow: inset 0 -3px 0 var(--danger);
}

td.selected-column {
  box-shadow: inset 2px 0 0 var(--danger), inset -2px 0 0 var(--danger);
}

@media (max-width: 900px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .filter-tools,
  .form-grid,
  .drop-zone {
    grid-template-columns: 1fr;
  }
}