:root {
  color-scheme: light;
  --bg: #fff;
  --surface: #f6f6f6;
  --ink: #202020;
  --muted: #777;
  --line: #d5d5d5;
  --nav: #222;
  --red: #df3f3f;
  --blue: #3478c6;
  --yellow: #e6b831;
  --focus: #1865b7;
  font-family: Arial, Helvetica, sans-serif;
}
:root.dark {
  color-scheme: dark;
  --bg: #171717;
  --surface: #242424;
  --ink: #f1f1f1;
  --muted: #aaa;
  --line: #444;
  --nav: #050505;
  --red: #e14c4c;
  --blue: #488cd9;
  --yellow: #edc23f;
  --focus: #79b4ff;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.app-shell { width: min(720px, calc(100% - 30px)); margin: 0 auto; }
.topbar { min-height: 47px; margin: 0 calc((720px - 100vw) / 2); padding: 0 max(15px, calc((100vw - 720px) / 2)); background: var(--nav); display: flex; justify-content: space-between; align-items: center; }
.brand { color: #fff; text-decoration: none; font-weight: 700; font-size: 19px; }
.topbar-actions { height: 47px; display: flex; }
.nav-button { border: 0; background: transparent; color: #eee; padding: 0 13px; font-size: 14px; }
.nav-button:hover, .nav-button[aria-expanded="true"] { background: #444; }
.scoreboard { padding: 35px 0 22px; text-align: center; }
.score-total { padding: 16px 0 25px; font-size: clamp(43px, 11vw, 69px); font-weight: 700; line-height: 1; }
.action-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.score-button { min-height: 105px; border: 0; color: #fff; font-size: 36px; font-weight: 700; }
.score-button span { display: block; margin-top: 5px; font-size: 14px; font-weight: 400; }
.score-button.correct { background: var(--red); }
.score-button.incorrect { background: var(--blue); }
.score-button.through { grid-column: 1 / -1; min-height: 58px; color: #312700; background: var(--yellow); font-size: 17px; }
.score-button:hover { filter: brightness(.94); }
.function-buttons { display: flex; justify-content: center; gap: 8px; margin-top: 16px; }
.function-buttons button, .small-button { border: 1px solid var(--line); background: var(--surface); color: var(--ink); padding: 10px 16px; font-size: 14px; }
.function-buttons button:disabled { opacity: .35; cursor: default; }
.status-text { min-height: 18px; margin: 15px 0 0; color: var(--muted); font-family: Consolas, monospace; font-size: 11px; }
.config-panel { border-top: 1px solid var(--line); padding: 25px 0 15px; }
.config-heading, .block-heading { display: flex; justify-content: space-between; gap: 16px; align-items: center; }
h1 { margin: 0; font-size: 24px; }
h2 { margin: 0; font-size: 16px; }
#save-state, footer { color: var(--muted); font-size: 11px; }
.config-block { padding: 19px 0; border-bottom: 1px solid var(--line); }
.field, .hook-editor { display: flex; flex-direction: column; gap: 7px; font-size: 13px; font-weight: 700; }
.field input, .field select { width: 100%; padding: 7px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); }
#rule-select { max-width: 220px; }
#display-template { width: 100%; font-family: Consolas, monospace; }
.help { margin: 9px 0; color: var(--muted); font-size: 12px; line-height: 1.5; }
code { background: var(--surface); padding: 2px 4px; font-family: Consolas, monospace; }
.rule-settings { display: grid; gap: 9px; margin-top: 12px; }
.rule-setting { display: grid; grid-template-columns: minmax(0, 1fr) 86px 100px; gap: 8px; align-items: end; }
.rule-setting .field { font-size: 12px; }
.rule-setting input, textarea { min-width: 0; border: 1px solid var(--line); background: var(--bg); color: var(--ink); padding: 8px; }
.hook-editor { margin-top: 12px; }
.hook-editor textarea { min-height: 49px; resize: vertical; font-family: Consolas, monospace; font-size: 12px; }
.data-editor { width: 100%; min-height: 200px; resize: vertical; font-family: Consolas, monospace; font-size: 12px; line-height: 1.45; }
.inline-error { min-height: 18px; margin-top: 7px; color: var(--red); font-size: 12px; }
footer { padding: 24px 0; text-align: center; }
@media (max-width: 480px) {
  .app-shell { width: min(100% - 22px, 720px); }
  .topbar { margin: 0 -11px; padding: 0 11px; }
  .scoreboard { padding-top: 27px; }
  .score-button { min-height: 88px; }
  .rule-setting { grid-template-columns: minmax(0, 1fr) 76px 84px; }
}