/* ============================================================
   Data Query Tool — styles
   ============================================================ */

:root {
  --bg:            #f4f6fa;
  --panel:         #ffffff;
  --panel-border:  #e3e7ee;
  --text:          #1f2937;
  --text-muted:    #6b7280;
  --text-faint:    #9ca3af;
  --accent:        #2563eb;
  --accent-hover:  #1d4ed8;
  --accent-soft:   #eff4ff;
  --danger:        #dc2626;
  --danger-soft:   #fee2e2;
  --success:       #059669;
  --warning:       #d97706;
  --row-stripe:    #f9fafb;
  --row-hover:     #eef3ff;
  --code-bg:       #0f172a;
  --code-text:     #e2e8f0;
  --shadow-sm:     0 1px 2px rgba(15,23,42,.04);
  --shadow:        0 4px 14px rgba(15,23,42,.06);
  --radius:        8px;
  --radius-sm:     6px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

h1, h2, h3 { margin: 0; font-weight: 600; }
h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); }
button { font-family: inherit; font-size: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }

/* ---------- top bar ---------- */
.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--panel-border);
  position: sticky; top: 0; z-index: 10;
}
.topbar-inner {
  max-width: 1500px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.brand-mark { color: var(--accent); font-size: 22px; line-height: 1; }
.brand-name { font-size: 15px; }
.topbar-actions { display: flex; gap: 8px; align-items: center; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: var(--radius-sm);
  border: 1px solid transparent; cursor: pointer;
  font-weight: 500; transition: background .12s, border-color .12s, color .12s;
  white-space: nowrap;
}
.btn-sm  { padding: 4px 10px; font-size: 12px; }
.btn-primary {
  background: var(--accent); color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary {
  background: var(--accent-soft); color: var(--accent);
  border-color: #d8e3ff;
}
.btn-secondary:hover { background: #e1ecff; }
.btn-ghost {
  background: transparent; color: var(--text-muted);
  border-color: var(--panel-border);
}
.btn-ghost:hover { background: var(--row-stripe); color: var(--text); }
.btn-danger-ghost {
  background: transparent; color: var(--danger);
  border: 1px solid transparent; padding: 4px 8px; border-radius: var(--radius-sm);
  cursor: pointer;
}
.btn-danger-ghost:hover { background: var(--danger-soft); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* hidden file input behind the Load button */
.btn-primary input[type="file"] {
  position: absolute; opacity: 0; pointer-events: none; width: 0; height: 0;
}
.btn-primary { position: relative; }

/* ---------- layout ---------- */
.layout {
  max-width: 1500px; margin: 0 auto;
  display: grid; grid-template-columns: 280px 1fr;
  gap: 20px; padding: 20px 24px;
}
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
}

.sidebar { display: flex; flex-direction: column; gap: 16px; }
.content { display: flex; flex-direction: column; gap: 16px; min-width: 0; }

/* ---------- panels ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--panel-border);
  background: #fbfcfe;
}
.panel-actions { display: flex; gap: 8px; align-items: center; }
.badge {
  background: var(--accent-soft); color: var(--accent);
  font-size: 11px; font-weight: 600;
  padding: 2px 8px; border-radius: 10px;
}

/* ---------- table list ---------- */
.table-list, .column-list {
  padding: 8px;
  max-height: 280px; overflow-y: auto;
}
.table-list .empty-hint, .column-list .empty-hint {
  margin: 12px; color: var(--text-faint); font-size: 13px;
}
.table-item, .column-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 10px; border-radius: var(--radius-sm); cursor: pointer;
  font-size: 13px;
}
.table-item:hover, .column-item:hover { background: var(--row-hover); }
.table-item.active { background: var(--accent-soft); color: var(--accent); font-weight: 500; }
.table-item-name { display: flex; align-items: center; gap: 8px; min-width: 0; }
.table-item-icon { color: var(--text-faint); }
.table-item.active .table-item-icon { color: var(--accent); }
.table-item-rows { color: var(--text-faint); font-size: 11px; }
.column-item { cursor: default; }
.column-type {
  font-size: 10px; text-transform: uppercase; letter-spacing: .05em;
  padding: 2px 6px; border-radius: 4px;
  background: var(--row-stripe); color: var(--text-muted);
}

/* ---------- dropzone ---------- */
.dropzone {
  background: var(--panel);
  border: 2px dashed #cbd5e1;
  border-radius: var(--radius);
  padding: 60px 24px;
  text-align: center;
  transition: background .15s, border-color .15s;
}
.dropzone.drag-over {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.dropzone-icon { font-size: 42px; color: var(--text-faint); margin-bottom: 8px; }
.dropzone h3 { font-size: 16px; margin-bottom: 4px; font-weight: 500; }
.dropzone p { color: var(--text-muted); margin: 0; font-size: 13px; }

/* ---------- filter builder ---------- */
.filter-builder { padding: 14px 16px; }
.filter-builder:empty::before {
  content: "No conditions yet — add one below to start filtering.";
  color: var(--text-faint); font-size: 13px;
}

.condition-row {
  display: grid;
  grid-template-columns: 70px 1fr 1fr 1.4fr auto;
  gap: 8px;
  align-items: center;
  padding: 6px 0;
}
.condition-row + .condition-row { border-top: 1px dashed var(--panel-border); }
.condition-row .connector {
  font-weight: 600; font-size: 11px; text-align: center;
  text-transform: uppercase; letter-spacing: .05em;
  padding: 4px 0; border-radius: var(--radius-sm); cursor: pointer;
  background: var(--row-stripe); color: var(--text-muted);
  border: 1px solid var(--panel-border);
}
.condition-row .connector.and { color: var(--accent); border-color: #d8e3ff; background: var(--accent-soft); }
.condition-row .connector.or  { color: var(--warning); border-color: #fde68a; background: #fffbeb; }
.condition-row .connector.first { visibility: hidden; }

.condition-row .select,
.condition-row .input {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  background: #fff;
}
.condition-row .select:focus,
.condition-row .input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.condition-row .input.between-pair {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 6px; align-items: center;
  padding: 0; border: none; background: transparent;
}
.condition-row .input.between-pair input {
  padding: 6px 8px; border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm); background: #fff; width: 100%;
}
.condition-row .input.between-pair span { color: var(--text-faint); font-size: 12px; }
.condition-row .value-hidden { visibility: hidden; }

.filter-toolbar {
  display: flex; gap: 8px; align-items: center;
  padding: 12px 16px; border-top: 1px solid var(--panel-border);
  background: #fbfcfe;
}

/* ---------- inline labels ---------- */
.lbl-inline {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--text-muted);
}
.lbl-inline .select {
  padding: 5px 8px; border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm); background: #fff; color: var(--text);
}

/* ---------- SQL preview ---------- */
.sql-output {
  width: 100%; min-height: 90px;
  padding: 12px 16px; margin: 0;
  background: var(--code-bg); color: var(--code-text);
  border: none; resize: vertical;
  font-family: "SF Mono", Menlo, Consolas, "Roboto Mono", monospace;
  font-size: 13px; line-height: 1.55;
}
.sql-output:focus { outline: 2px solid var(--accent); outline-offset: -2px; }
.sql-output[readonly] { background: #1e293b; }

.result-meta {
  margin-left: auto; font-size: 12px; color: var(--text-muted);
}

/* ---------- results table ---------- */
.results { overflow-x: auto; max-height: 60vh; }
.results .empty-hint { padding: 20px; color: var(--text-faint); margin: 0; }
.results-table {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.results-table th, .results-table td {
  padding: 8px 12px; text-align: left;
  border-bottom: 1px solid var(--panel-border);
  white-space: nowrap; max-width: 360px;
  overflow: hidden; text-overflow: ellipsis;
}
.results-table th {
  position: sticky; top: 0;
  background: #fbfcfe; font-weight: 600;
  color: var(--text-muted); font-size: 12px;
  text-transform: uppercase; letter-spacing: .04em;
  border-bottom: 1px solid var(--panel-border);
}
.results-table tr:nth-child(even) td { background: var(--row-stripe); }
.results-table tr:hover td { background: var(--row-hover); }
.results-table td.null { color: var(--text-faint); font-style: italic; }
.results-error {
  margin: 0; padding: 16px;
  background: var(--danger-soft); color: var(--danger);
  font-family: "SF Mono", Menlo, Consolas, "Roboto Mono", monospace;
  font-size: 13px; white-space: pre-wrap;
}

/* ---------- toast ---------- */
.toast {
  position: fixed; bottom: 20px; right: 20px;
  background: #1f2937; color: #fff;
  padding: 10px 16px; border-radius: var(--radius);
  box-shadow: var(--shadow); z-index: 100;
  font-size: 13px; max-width: 380px;
  animation: toast-in .2s ease;
}
.toast.error   { background: var(--danger); }
.toast.success { background: var(--success); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- responsive bits ---------- */
@media (max-width: 700px) {
  .condition-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 10px 0;
  }
  .condition-row .connector.first { display: none; }
}