/* Shared design system for every micro app. Keep small; apps may add a few local rules. */
:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #1b1f24;
  --muted: #5b6470;
  --line: #d9dee5;
  --accent: #2557d6;
  --accent-text: #ffffff;
  --good: #16794a;
  --good-bg: #e7f6ee;
  --bad: #b42318;
  --bad-bg: #fdecea;
  --radius: 12px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --card: #1a1f25;
    --text: #e8ebef;
    --muted: #9aa4b0;
    --line: #2e3640;
    --accent: #6b93ff;
    --accent-text: #0b0f14;
    --good: #5fd39a;
    --good-bg: #13291f;
    --bad: #ff8a80;
    --bad-bg: #3a1714;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 16px; }
header.app-head { margin: 8px 0 16px; }
header.app-head h1 { font-size: 1.5rem; margin: 0 0 4px; line-height: 1.3; }
header.app-head p { margin: 0; color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}
label { display: block; font-weight: 600; margin: 12px 0 4px; }
label:first-child { margin-top: 0; }
.hint { font-size: .875rem; color: var(--muted); margin: 2px 0 0; }
input, select, textarea {
  width: 100%;
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  min-height: 44px;
}
textarea { min-height: 120px; resize: vertical; }
input:focus, select:focus, textarea:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.row + .row { margin-top: 12px; }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
button {
  font: inherit;
  font-weight: 600;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-text);
  border-radius: 8px;
  padding: 10px 16px;
  min-height: 44px;
  cursor: pointer;
}
button.secondary { background: transparent; color: var(--accent); }
.result { font-size: 1.05rem; }
.result:empty { display: none; }
.result .big { font-size: 1.6rem; font-weight: 700; }
.error {
  color: var(--bad);
  background: var(--bad-bg);
  border-radius: 8px;
  padding: 10px 12px;
  margin-top: 12px;
}
.error:empty { display: none; }
.ok { color: var(--good); background: var(--good-bg); border-radius: 8px; padding: 2px 8px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
.table-scroll { overflow-x: auto; }
footer.app-foot { color: var(--muted); font-size: .85rem; padding: 8px 0 32px; }
footer.app-foot a { color: var(--accent); }