:root {
    --bg: #fbfaf8;
    --card: #ffffff;
    --line: #e6e2db;
    --ink: #1c1b19;
    --dim: #74706a;
    --good: #2f9e5e;
    --mid: #d79a20;
    --bad: #d0483c;
    --track: #eceae5;
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #161513;
      --card: #201f1c;
      --line: #33312d;
      --ink: #f2efe9;
      --dim: #9b968e;
      --good: #4fbd7c;
      --mid: #e0ae3f;
      --bad: #e2685b;
      --track: #2c2a27;
    }
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    padding: 48px 20px 80px;
    background: var(--bg);
    color: var(--ink);
    font: 15px/1.5 ui-sans-serif, -apple-system, "Segoe UI", system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
  }
  main { max-width: 560px; margin: 0 auto; }
  h1 { font-size: 26px; margin: 0 0 4px; letter-spacing: -0.02em; }
  .tagline { color: var(--dim); margin: 0 0 28px; font-size: 14px; }
  .bar-row { display: flex; gap: 10px; margin-bottom: 24px; flex-wrap: wrap; }
  button {
    font: inherit;
    font-weight: 550;
    padding: 9px 16px;
    border-radius: 9px;
    border: 1px solid var(--line);
    background: var(--card);
    color: var(--ink);
    cursor: pointer;
  }
  button:hover:not(:disabled) { border-color: var(--dim); }
  button:disabled { opacity: 0.5; cursor: default; }
  button.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
  ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
  li {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 14px 16px;
    display: grid;
    grid-template-columns: 34px 1fr auto;
    gap: 4px 14px;
    align-items: center;
  }
  .icon { font-size: 22px; grid-row: span 2; text-align: center; }
  .name { font-weight: 550; }
  .pct { font-variant-numeric: tabular-nums; font-size: 19px; font-weight: 600; grid-row: span 2; }
  .track { grid-column: 2 / 4; height: 7px; border-radius: 4px; background: var(--track); overflow: hidden; }
  .fill { height: 100%; border-radius: 4px; transition: width 0.4s ease; }
  .note { color: var(--dim); font-size: 13px; grid-column: 2 / 4; }
  .empty {
    border: 1px dashed var(--line);
    border-radius: 12px;
    padding: 28px 20px;
    text-align: center;
    color: var(--dim);
  }
  .status { color: var(--dim); font-size: 13px; margin-top: 18px; min-height: 20px; }
  .status.err { color: var(--bad); }
  .bolt { font-size: 13px; margin-right: 3px; vertical-align: 2px; }
  .pct.stale { opacity: 0.5; }
  .fill.stale { opacity: 0.4; }
  .fill.charging { animation: pulse 1.6s ease-in-out infinite; }
  @keyframes pulse { 50% { opacity: 0.5; } }
  .live {
    display: inline-block;
    width: 6px; height: 6px;
    margin-right: 7px;
    border-radius: 50%;
    background: var(--good);
    animation: pulse 2s ease-in-out infinite;
  }
  @media (prefers-reduced-motion: reduce) {
    .fill.charging, .live { animation: none; }
  }
  code { background: var(--track); padding: 1px 5px; border-radius: 4px; font-size: 0.9em; }
  /* Reference material, deliberately quiet so it never competes with the tool. */
  .prose {
    margin-top: 56px;
    padding-top: 28px;
    border-top: 1px solid var(--line);
    color: var(--dim);
    font-size: 14px;
  }
  .prose h2 {
    font-size: 15px;
    color: var(--ink);
    margin: 32px 0 8px;
    letter-spacing: -0.01em;
  }
  .prose h2:first-child { margin-top: 0; }
  .prose h3 {
    font-size: 14px;
    font-weight: 550;
    color: var(--ink);
    margin: 22px 0 6px;
  }
  .prose p { margin: 0 0 10px; }
  .prose ul { display: block; margin: 0 0 10px; padding-left: 20px; list-style: disc; }
  .prose li {
    display: list-item;
    background: none;
    border: 0;
    border-radius: 0;
    padding: 1px 0;
    margin: 0;
  }
  .prose strong { color: var(--ink); }

footer {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 13px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
footer a, .tagline a, .prose a { color: var(--dim); text-decoration: underline; }
footer a:hover, .tagline a:hover, .prose a:hover { color: var(--ink); }
/* The FAQ page has no tool above it, so its first section needs no separator. */
.prose.lead { margin-top: 28px; border-top: 0; padding-top: 0; }