:root {
  --bg: #f6f7f9; --card: #fff; --text: #1d2330; --muted: #667085; --border: #dde1e7;
  --accent: #3559e0; --ok: #1a7f37; --warn: #9a6700; --err: #c62828; --code: #f2f4f7;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111418; --card: #1a1e24; --text: #e6e8eb; --muted: #98a2b3; --border: #2c323b;
          --accent: #7b96ff; --ok: #4ac26b; --warn: #d4a72c; --err: #ff6b6b; --code: #222831; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
       font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
header, main { max-width: 1650px; margin: 0 auto; padding: 16px; }
h1 { margin: 8px 0 4px; }
h2 { margin: 0 0 12px; font-size: 18px; display: flex; align-items: center; gap: 8px; }
h3 { font-size: 14px; margin: 16px 0 6px; }
.muted { color: var(--muted); } .small { font-size: 13px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.hidden { display: none !important; }
.num { display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 50%;
       background: var(--accent); color: #fff; font-size: 13px; }
textarea { width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 8px;
           background: var(--bg); color: var(--text); font: inherit; resize: vertical; }
label { display: block; margin: 12px 0 4px; font-weight: 600; }
.row { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
button { background: var(--accent); color: #fff; border: 0; border-radius: 8px; padding: 9px 16px; font: inherit; cursor: pointer; }
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button:disabled { opacity: .5; cursor: default; }
pre { background: var(--code); padding: 10px; border-radius: 8px; overflow-x: auto; font-size: 12.5px; margin: 0; white-space: pre-wrap; }
.log { margin: 0; padding-left: 20px; font-size: 13.5px; }
.log .ok { color: var(--ok); } .log .warn { color: var(--warn); } .log .error { color: var(--err); }
.log .t { color: var(--muted); margin-right: 6px; font-variant-numeric: tabular-nums; }
.retry { margin-top: 14px; }
.retry > summary { color: var(--accent); }
/* one variant per row: its tables get the width they need */
.options { display: grid; grid-template-columns: 1fr; gap: 12px; }
.option { border: 2px solid var(--border); border-radius: 10px; padding: 12px; cursor: pointer; }
.option.selected { border-color: var(--accent); }
.option h4 { margin: 0 0 6px; font-size: 15px; display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.option h4 .badge { flex: none; }
.option ul { margin: 4px 0; padding-left: 18px; font-size: 13.5px; }
.pros li::marker { content: "+ "; color: var(--ok); } .cons li::marker { content: "− "; color: var(--err); }
table.cols { width: 100%; border-collapse: collapse; font-size: 12.5px; margin: 6px 0; }
table.cols td, table.cols th { border-bottom: 1px solid var(--border); padding: 3px 4px; text-align: left; vertical-align: top; }
table.cols code { font-size: 12px; }
#schema-tables table.cols td:first-child code { overflow-wrap: normal; }   /* column names stay whole */
.badge { font-size: 12px; padding: 2px 8px; border-radius: 99px; color: #fff; white-space: nowrap; }
.badge.ok { background: var(--ok); } .badge.fail { background: var(--err); }
details { margin-top: 10px; } summary { cursor: pointer; color: var(--muted); }
.spinner { width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--accent);
           border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
input { padding: 9px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg);
        color: var(--text); font: inherit; min-width: 0; flex: 1; max-width: 360px; }
.row.tight { margin-top: 0; }
button.link { background: none; color: var(--accent); padding: 0; font-size: 13px; font-weight: normal; }
button.danger { background: transparent; color: var(--err); border: 1px solid var(--err); }
.schema-list { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 4px; }
.schema-item { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; text-align: left;
               background: var(--bg); color: var(--text); border: 1px solid var(--border); max-width: 100%; }
.schema-item:hover { border-color: var(--accent); }
/* at most 3 tables in a row: a column is never narrower than a third of the row */
.tables-grid { display: grid; gap: 12px; align-items: start;
               grid-template-columns: repeat(auto-fill, minmax(max(260px, calc((100% - 24px) / 3)), 1fr)); }
.tbl { min-width: 0; }
.badge.new { background: var(--accent); margin-left: 6px; }
code { overflow-wrap: anywhere; }

/* buttons that are links */
a.button { display: inline-block; text-decoration: none; border-radius: 8px; padding: 8px 14px; font-size: 14px; }
a.button.secondary { color: var(--accent); border: 1px solid var(--accent); }
.diagram-actions { align-items: center; margin: 8px 0 4px; }

/* change mode */
.mode { align-items: center; margin-bottom: 10px; }
label.radio { display: inline-flex; align-items: center; gap: 6px; margin: 0; font-weight: normal; cursor: pointer; }
label.radio input { flex: none; min-width: auto; }
select { padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg);
         color: var(--text); font: inherit; }
select:disabled { opacity: .5; }
.tbl-head { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
details.tbl > summary.tbl-head { cursor: pointer; list-style: none; }
details.tbl > summary.tbl-head::-webkit-details-marker { display: none; }
details.tbl > summary.tbl-head::before { content: "▸"; color: var(--muted); width: 1em; }
details.tbl[open] > summary.tbl-head::before { content: "▾"; }
details.tbl[open] > summary.tbl-head { margin-bottom: 6px; }
.badge.changed { background: var(--warn); }
.warn-text { color: var(--warn); }

/* column diff of a changed table */
tr.diff td.mark { width: 14px; font-weight: 700; }
tr.diff.added { background: color-mix(in srgb, var(--ok) 12%, transparent); }
tr.diff.added td.mark { color: var(--ok); }
tr.diff.removed { background: color-mix(in srgb, var(--err) 10%, transparent); }
tr.diff.removed td.mark { color: var(--err); }
tr.diff.removed code { text-decoration: line-through; }
tr.diff.changed { background: color-mix(in srgb, var(--warn) 12%, transparent); }
tr.diff.changed td.mark { color: var(--warn); }
tr.diff.same { opacity: .7; }

/* ER diagram */
.diagram { overflow: auto; max-height: 70vh; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); }
.small-diagram { max-height: 360px; }
.erd { display: block; font: 12px ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.erd .box { fill: var(--card); stroke: var(--border); stroke-width: 1.2; }
.erd .head { fill: var(--code); }
.erd .title { fill: var(--text); font-weight: 700; font-size: 13px; }
.erd .col { fill: var(--text); }
.erd .col.pk { text-decoration: underline; }
.erd .col.null { font-style: italic; fill: var(--muted); }
.erd .type { fill: var(--muted); }
.erd .key { fill: var(--accent); font-size: 10px; font-weight: 700; }
.erd .edge { fill: none; stroke: var(--muted); stroke-width: 1.3; }
.erd .edge.optional { stroke-dasharray: 5 4; }
.erd .edge:hover { stroke: var(--accent); stroke-width: 2.2; }
.erd .mk { fill: none; stroke: var(--muted); stroke-width: 1.3; }
.erd .new .box { stroke: var(--accent); stroke-width: 2; }
.erd .new .head { fill: color-mix(in srgb, var(--accent) 22%, var(--card)); }
.erd .changed .box { stroke: var(--warn); stroke-width: 2; }
.erd .changed .head { fill: color-mix(in srgb, var(--warn) 22%, var(--card)); }
.tbl-head .actions { margin-left: auto; display: inline-flex; gap: 10px; }
button.link.danger-link { color: var(--err); }
.struck { text-decoration: line-through; }
.erd .connector .box { stroke-dasharray: 6 3; }
.erd .connector .head { fill: color-mix(in srgb, #9673a6 20%, var(--card)); }
.badge.m2m { background: #8a63b0; margin-left: 6px; }
.m2m-note { border-left: 3px solid #8a63b0; padding: 6px 10px; margin: 0 0 12px; background: color-mix(in srgb, #8a63b0 8%, transparent); }

/* a button whose action is running */
button.busy { display: inline-flex; align-items: center; gap: 8px; opacity: .85; cursor: progress; }
button:disabled.busy { opacity: .85; }
.spinner.inline { width: 12px; height: 12px; border-color: rgba(255, 255, 255, .45); border-top-color: #fff; }
button.secondary .spinner.inline, button.danger .spinner.inline { border-color: var(--border); border-top-color: var(--accent); }
#progress { scroll-margin-top: 12px; }
#btn-cancel { margin-left: auto; font-weight: normal; }

/* login and user box */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.user-box { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
button.small-btn { padding: 5px 10px; font-size: 13px; }
.login-main { max-width: 420px; margin: 10vh auto; padding: 16px; }
.login-card input { max-width: none; width: 100%; }
.error-text { color: var(--err); }
.danger-zone summary { color: var(--err); }

/* review of a revised variant */
.badge.review { background: #8a63b0; }
.review-option { cursor: default; }
.review-meta { border-left: 3px solid #8a63b0; padding: 6px 10px; margin: 6px 0 10px;
               background: color-mix(in srgb, #8a63b0 8%, transparent); }
.review-meta ul { margin: 2px 0 6px; padding-left: 18px; }
.model-box { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.model-box label { margin: 0; font-weight: normal; }
.model-box select { padding: 5px 8px; font-size: 13px; }

.group { align-items: center; margin: -2px 0 10px; }
.group label.radio code { font-size: 13px; }

.rules { margin: 6px 0; padding-left: 18px; }
.rules li { margin: 4px 0; }
.rules .link { margin-left: 8px; }
.option > .diagram { margin: 8px 0; }