/* mdtable — visual Markdown table builder. Dependency-free, offline. */

:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --text: #1b1f24;
  --muted: #5c6772;
  --border: #d6dae0;
  --grid-line: #dfe3e8;
  --accent: #2f6fed;
  --accent-soft: #e6efff;
  --header-bg: #eef1f6;
  --danger: #d23b3b;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 8px 24px rgba(0,0,0,.06);
  --radius: 10px;
  --cell-w: 168px;
  --gutter-w: 38px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --surface: #1c2026;
    --surface-2: #22272f;
    --text: #e6e9ee;
    --muted: #9aa4b1;
    --border: #333a44;
    --grid-line: #333a44;
    --accent: #5b8dff;
    --accent-soft: #1e2a44;
    --header-bg: #232a33;
    --danger: #f06363;
    --shadow: 0 1px 3px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.4);
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  font-size: 26px;
  line-height: 1;
  color: var(--accent);
}
.brand h1 { font-size: 18px; margin: 0; letter-spacing: .2px; }
.tagline { margin: 2px 0 0; font-size: 12.5px; color: var(--muted); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- buttons ---------- */
button {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 7px 13px;
  border-radius: 8px;
  transition: background .12s, border-color .12s, opacity .12s;
}
button:hover:not(:disabled) { background: var(--surface-2); border-color: var(--accent); }
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: .45; cursor: default; }
button#btn-copy, button#btn-download {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
button#btn-copy:hover, button#btn-download:hover { filter: brightness(1.05); background: var(--accent); }
button.ghost { background: transparent; }
button.danger:hover:not(:disabled) { border-color: var(--danger); color: var(--danger); }

/* ---------- layout ---------- */
main {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 16px;
  padding: 16px 20px 28px;
  align-items: start;
}
@media (max-width: 920px) {
  main { grid-template-columns: 1fr; }
}

.pane {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px 18px;
  box-shadow: var(--shadow);
  min-width: 0;
}
.pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}
.pane-head h2 { font-size: 14px; margin: 0; text-transform: uppercase; letter-spacing: .6px; color: var(--muted); }
.toolbar { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.toolbar button { padding: 5px 10px; font-size: 13px; }
.toolbar .sep { width: 1px; height: 20px; background: var(--border); margin: 0 4px; }
.toggle { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); cursor: pointer; }
.toggle input { accent-color: var(--accent); }

.hint { font-size: 12.5px; color: var(--muted); margin: 4px 0 12px; }
.hint kbd, kbd {
  font: 11px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 2px 5px;
  color: var(--text);
}
.grip-inline { color: var(--accent); font-weight: 700; }

/* ---------- grid editor ---------- */
.grid-scroll { overflow: auto; padding: 4px 10px 14px 4px; }
.grid-wrap { position: relative; display: inline-block; }

.grid {
  display: grid;
  background: var(--grid-line);
  border: 1px solid var(--grid-line);
  border-radius: 8px;
  gap: 1px;
  overflow: hidden;
}

.cell, .gutter, .corner {
  background: var(--surface);
  position: relative;
}
.corner { background: var(--surface-2); }

/* gutters (row numbers / column letters) */
.gutter {
  background: var(--surface-2);
  color: var(--muted);
  font-size: 11.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  min-height: 30px;
}
.gutter .label { pointer-events: none; }
.gutter-row { flex-direction: column; gap: 2px; }

/* mini controls that appear on hover of a gutter */
.gutter .ctl {
  position: absolute;
  display: none;
  gap: 2px;
}
.gutter:hover .ctl, .gutter:focus-within .ctl { display: flex; }
.gutter:hover .label, .gutter-col:hover .align { opacity: .25; }

/* Touch devices have no hover, so always show the insert/delete controls. */
@media (hover: none) {
  .gutter .ctl { display: flex; }
}

.gutter-col .ctl { top: 2px; right: 2px; }
.gutter-row .ctl { bottom: 2px; left: 50%; transform: translateX(-50%); flex-direction: row; }

.minibtn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  border-radius: 4px;
  width: 17px; height: 17px;
  font-size: 11px; line-height: 1;
  padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
}
.minibtn:hover { color: var(--accent); border-color: var(--accent); background: var(--surface); }
.minibtn.del:hover { color: var(--danger); border-color: var(--danger); }

/* alignment control inside column gutter */
.align {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 5px;
  overflow: hidden;
  font-size: 10px;
}
.align button {
  border: 0; border-right: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  padding: 1px 5px;
  border-radius: 0;
  font-size: 10px;
  line-height: 1.4;
}
.align button:last-child { border-right: 0; }
.align button.on { background: var(--accent); color: #fff; }
.gutter-col {
  flex-direction: column;
  gap: 3px;
  padding: 4px 2px;
  min-height: 34px;
}
.gutter-col .colname { font-weight: 600; color: var(--text); opacity: .8; }

/* data cells */
.cell { padding: 0; }
.cell textarea {
  display: block;
  width: var(--cell-w);
  border: 0;
  outline: 0;
  resize: none;
  font: inherit;
  color: var(--text);
  background: transparent;
  padding: 7px 9px;
  min-height: 34px;
  overflow: hidden;
  white-space: pre-wrap;
  word-break: break-word;
}
.cell textarea::placeholder { color: var(--muted); opacity: .6; }
.cell.header textarea { font-weight: 600; background: var(--header-bg); }
.cell.focused { box-shadow: inset 0 0 0 2px var(--accent); border-radius: 2px; }
.cell.col-left textarea { text-align: left; }
.cell.col-center textarea { text-align: center; }
.cell.col-right textarea { text-align: right; }

/* resize handle */
.resize-handle {
  position: absolute;
  right: -7px;
  bottom: -7px;
  width: 20px; height: 20px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; line-height: 1;
  cursor: nwse-resize;
  box-shadow: var(--shadow);
  user-select: none;
  touch-action: none;
}
.resize-handle:hover, .resize-handle:focus-visible { filter: brightness(1.1); outline: 2px solid var(--accent-soft); }
.grid-wrap.resizing { user-select: none; }

/* ---------- source ---------- */
.source {
  width: 100%;
  min-height: 320px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--text);
  padding: 12px 14px;
  font: 13px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  tab-size: 2;
}
.source:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  bottom: 22px; left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--text);
  color: var(--bg);
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 13.5px;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: opacity .18s, transform .18s;
  pointer-events: none;
  z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- help modal ---------- */
.modal {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center;
  padding: 20px; z-index: 100;
}
.modal[hidden] { display: none; }
.modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  max-width: 720px; width: 100%;
  max-height: 88vh; overflow: auto;
  padding: 18px 22px 24px;
}
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.modal-head h2 { margin: 0; font-size: 17px; }
.icon-btn { border: 0; background: transparent; font-size: 16px; color: var(--muted); padding: 4px 8px; }
.icon-btn:hover { color: var(--text); background: var(--surface-2); }
.shortcuts { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 28px; }
@media (max-width: 620px) { .shortcuts { grid-template-columns: 1fr; } }
.shortcuts dl { margin: 0; }
.shortcuts dt { margin-top: 10px; }
.shortcuts dd { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.modal-note { grid-column: 1 / -1; margin-top: 16px; font-size: 13px; color: var(--muted); line-height: 1.6; }
code { font: 12px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--surface-2); padding: 1px 5px; border-radius: 4px; }