/* =============================================================================
 * styles.css — Shared app chrome, settings panel, and preview styling
 * ========================================================================== */

:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --border: #dfe3e8;
  --text: #1f2933;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #b91c1c;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.45;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Top bar ---- */
.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 14px 22px;
  display: flex;
  align-items: baseline;
  gap: 14px;
}
.topbar h1 { font-size: 18px; margin: 0; font-weight: 700; }
.topbar .crumb { color: var(--muted); font-size: 14px; }
.topbar .crumb a { color: var(--muted); }

/* ---- Landing page cards ---- */
.wrap { max-width: 1080px; margin: 0 auto; padding: 28px 22px; }
.lead { color: var(--muted); max-width: 720px; margin: 0 0 24px; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
  transition: transform .08s ease, box-shadow .08s ease;
  color: var(--text);
}
.card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.10); text-decoration: none; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.card.disabled { opacity: .55; pointer-events: none; }
.card .badge { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }

/* ---- Chart page: two-column layout ---- */
.layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 0;
  min-height: calc(100vh - 51px);
}
.controls {
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 18px 18px 60px;
  overflow-y: auto;
  max-height: calc(100vh - 51px);
}
.preview-pane {
  padding: 24px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .controls { max-height: none; border-right: none; border-bottom: 1px solid var(--border); }
}

/* ---- Control sections ---- */
.section { margin-bottom: 20px; }
.section > h2 {
  font-size: 12px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--muted); margin: 0 0 10px; font-weight: 700;
}
/* ---- "Expected data layout" example table (shown under the Data header) ---- */
.data-example { margin: 0 0 14px; }
.data-example .example-label {
  font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 6px;
}
.data-example table { border-collapse: collapse; width: 100%; font-size: 12px; }
.data-example th, .data-example td {
  border: 1px solid var(--border); padding: 4px 8px; text-align: left;
}
.data-example th { background: #f3f4f6; font-weight: 600; color: var(--text); }
.data-example th .opt { font-weight: 400; color: var(--muted); }
.data-example td { color: var(--text); font-variant-numeric: tabular-nums; }
.data-example .note { font-size: 12px; color: var(--muted); margin-top: 6px; }

.field { margin-bottom: 10px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; }
.field .hint { font-size: 12px; color: var(--muted); font-weight: 400; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.row2 .field { margin-bottom: 0; }

input[type="text"], input[type="number"], select, textarea {
  width: 100%;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
textarea { resize: vertical; min-height: 90px; font-family: ui-monospace, Menlo, Consolas, monospace; }
input[type="color"] { width: 44px; height: 30px; padding: 2px; border: 1px solid var(--border); border-radius: 6px; background: #fff; vertical-align: middle; }
.color-row { display: flex; align-items: center; gap: 8px; }
.color-row input[type="text"] { flex: 1; }
input:focus, select:focus, textarea:focus { outline: 2px solid rgba(37,99,235,.35); border-color: var(--accent); }

input[type="range"] { width: 100%; margin: 4px 0 0; }
.checkbox-row { display: flex; align-items: center; gap: 8px; }

/* ---- Multi-series column picker (grouped/clustered charts) ---- */
.checkbox-list { max-height: 220px; overflow-y: auto; border: 1px solid var(--border); border-radius: 6px; padding: 8px; }
.checkbox-list .checkbox-row { margin-bottom: 4px; }
.checkbox-list .checkbox-row:last-child { margin-bottom: 0; }
.series-row { margin-bottom: 8px; }
.series-row:last-child { margin-bottom: 0; }
.series-row .checkbox-row { margin-bottom: 4px; }
.series-err-wrap { display: flex; gap: 6px; margin-left: 22px; margin-bottom: 4px; }
.series-err-wrap select { flex: 1 1 auto; min-width: 0; font-size: 12px; padding: 4px 6px; }

/* ---- Per-series/group color+pattern swatch rows ---- */
.swatch-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.swatch-row .swatch-label { flex: 1 1 auto; min-width: 0; font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.swatch-row .color-row { flex: 0 0 auto; }
.swatch-row select { flex: 0 0 128px; }

/* ---- Per-bar override rules ---- */
.override-row { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-bottom: 10px; padding: 8px; border: 1px solid var(--border); border-radius: 6px; background: #fafafa; }
.override-row select { flex: 1 1 100px; min-width: 90px; }
.override-row .color-row { flex: 0 0 auto; }
.override-row .remove-btn { flex: 0 0 auto; padding: 4px 10px; font-size: 12px; color: var(--danger); }
.checkbox-row input { width: auto; }
.checkbox-row label { margin: 0; }

/* ---- Buttons ---- */
button, .btn {
  font-family: inherit; font-size: 13px; font-weight: 600;
  padding: 8px 14px; border-radius: 6px; border: 1px solid var(--border);
  background: #fff; color: var(--text); cursor: pointer;
}
button:hover { background: #f3f4f6; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-block { width: 100%; }

/* ---- Advanced toggles (collapsible) ---- */
.advanced-toggle {
  width: 100%; text-align: left; display: flex; align-items: center; justify-content: space-between;
  background: #f8f9fb; border: 1px solid var(--border); margin-bottom: 8px;
}
.advanced-toggle .chev { transition: transform .12s ease; color: var(--muted); }
.advanced-toggle[aria-expanded="true"] .chev { transform: rotate(90deg); }
.advanced-body { display: none; padding: 4px 2px 6px; border-left: 2px solid var(--border); margin: 0 0 12px 4px; padding-left: 12px; }
.advanced-body.open { display: block; }

/* ---- Status / messages ---- */
.status { font-size: 12px; margin-top: 6px; }
.status.ok { color: #15803d; }
.status.err { color: var(--danger); }

/* ---- Preview surface ---- */
.preview-toolbar { width: 100%; max-width: 100%; display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; color: var(--muted); font-size: 13px; }
.preview-surface {
  background:
    linear-gradient(45deg, #eef0f3 25%, transparent 25%),
    linear-gradient(-45deg, #eef0f3 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #eef0f3 75%),
    linear-gradient(-45deg, transparent 75%, #eef0f3 75%);
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow);
  max-width: 100%;
  overflow: auto;
}
.preview-surface svg { display: block; }