:root {
    --bg: #12100e;
    --panel: #1b1815;
    --line: #2e2924;
    --text: #ede8e0;
    --muted: #9a9088;
    --accent: #d98A5a;
    --high: #6fb98f;
    --med: #d9a441;
    --low: #cf6a5a;
    --radius: 14px;
  }
  @media (prefers-color-scheme: light) {
    :root {
      --bg: #f6f3ee; --panel: #fffdfa; --line: #e2dbd0;
      --text: #23201c; --muted: #6d655c; --accent: #b8663a;
    }
  }
  * { box-sizing: border-box; }
  /* An author rule as ordinary as `.field { display: block }` outranks the
     browser's own [hidden] rule, so hiding by attribute silently does nothing
     on most of this page. Said once here rather than remembered per call site. */
  [hidden] { display: none !important; }
  body {
    margin: 0; min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    padding: 32px 20px;
    background: var(--bg); color: var(--text);
    font: 15px/1.55 ui-sans-serif, "Segoe UI", system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
  }
  main { width: 100%; max-width: 560px; }

  header { margin-bottom: 22px; }
  h1 {
    margin: 0; font-size: 27px; font-weight: 600; letter-spacing: -.02em;
    font-family: Georgia, "Iowan Old Style", serif;
  }
  .sub { margin: 5px 0 0; color: var(--muted); font-size: 13.5px; }

  .card {
    background: var(--panel); border: 1px solid var(--line);
    border-radius: var(--radius); padding: 26px;
  }

  /* ---- drop zone ---- */
  #drop {
    border: 1.5px dashed var(--line); border-radius: 11px;
    padding: 44px 20px; text-align: center; cursor: pointer;
    transition: border-color .15s, background .15s;
  }
  #drop:hover, #drop.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 7%, transparent); }
  #drop.over { border-style: solid; }
  #drop .big { font-size: 16px; font-weight: 500; }
  #drop .small { color: var(--muted); font-size: 13px; margin-top: 5px; }
  #drop svg { width: 30px; height: 30px; color: var(--muted); margin-bottom: 10px; }
  #drop:hover svg, #drop.over svg { color: var(--accent); }

  /* ---- options ---- */
  .opts {
    display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
    margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line);
    font-size: 13px; color: var(--muted);
  }
  .seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
  .seg button {
    border: 0; background: transparent; color: var(--muted);
    padding: 6px 13px; font: inherit; cursor: pointer;
  }
  .seg button[aria-pressed="true"] { background: var(--accent); color: #fff; }
  .seg button:disabled { opacity: .4; cursor: not-allowed; }
  .hint { flex: 1 1 100%; font-size: 12.5px; }

  /* ---- progress ---- */
  #run .phase { font-size: 15px; font-weight: 500; }
  #run .detail { color: var(--muted); font-size: 13px; margin-top: 4px; min-height: 20px; }
  .bar { height: 6px; border-radius: 4px; background: var(--line); overflow: hidden; margin: 18px 0 8px; }
  .bar > i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .3s ease; }
  .bar.indef > i { width: 35%; animation: slide 1.4s ease-in-out infinite; }
  @keyframes slide { 0% { margin-left: -35%; } 100% { margin-left: 100%; } }
  .count { display: flex; justify-content: space-between; color: var(--muted); font-size: 12.5px; }

  /* ---- summary ---- */
  .stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 20px 0; }
  .stat { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
  .stat b { display: block; font-size: 21px; font-weight: 600; letter-spacing: -.02em; }
  .stat span { color: var(--muted); font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; }
  .bands { display: flex; gap: 6px; margin-bottom: 18px; font-size: 12.5px; }
  .band { flex: 1; padding: 8px 10px; border-radius: 8px; background: var(--bg); border: 1px solid var(--line); }
  .band i { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
  .band.high i { background: var(--high); } .band.med i { background: var(--med); } .band.low i { background: var(--low); }
  .band b { font-weight: 600; }

  .row { display: flex; gap: 10px; }
  .btn {
    flex: 1; text-align: center; text-decoration: none;
    padding: 10px 16px; border-radius: 9px; border: 1px solid var(--line);
    background: transparent; color: var(--text); font: inherit; cursor: pointer;
  }
  .btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
  .btn:hover { border-color: var(--accent); }

  .note {
    margin-top: 18px; padding: 12px 14px; border-radius: 9px;
    background: color-mix(in srgb, var(--med) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--med) 35%, transparent);
    color: var(--text); font-size: 12.5px; line-height: 1.5;
  }
  .err { background: color-mix(in srgb, var(--low) 14%, transparent);
         border-color: color-mix(in srgb, var(--low) 40%, transparent); }
  .hidden { display: none; }
  footer { margin-top: 16px; color: var(--muted); font-size: 12px; text-align: center; }

/* ---- hosted app chrome (sign-in, quota, account) ---- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 22px;
}
.topbar .who { color: var(--muted); font-size: 12.5px; }
.topbar .who b { color: var(--text); font-weight: 500; }
.topbar a.plain { color: var(--muted); font-size: 12.5px; }

.quota { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--muted); }
.quota .track { width: 76px; height: 5px; border-radius: 3px; background: var(--line); overflow: hidden; }
.quota .track > i { display: block; height: 100%; background: var(--accent); }
.quota.low .track > i { background: var(--low); }

.center { text-align: center; }
.center p { color: var(--muted); font-size: 13.5px; }
.gbtn {
  display: inline-flex; align-items: center; gap: 10px; text-decoration: none;
  margin-top: 6px; padding: 11px 20px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--panel); color: var(--text);
  font: inherit; cursor: pointer;
}
.gbtn:hover { border-color: var(--accent); }
.gbtn svg { width: 17px; height: 17px; }

/* ---- live cost + detailed progress ---- */
.meta {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 12px; margin-top: 14px; padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12.5px; color: var(--muted);
}
.cost { font-variant-numeric: tabular-nums; }
.cost b {
  color: var(--text); font-size: 15px; font-weight: 600;
  letter-spacing: -.01em; margin-right: 3px;
}
.cost .est { color: var(--med); }
.elapsed { font-variant-numeric: tabular-nums; }

.tokens {
  margin-top: 8px; font-size: 11.5px; color: var(--muted);
  font-variant-numeric: tabular-nums; line-height: 1.5;
}
.tokens span { margin-right: 12px; white-space: nowrap; }
.tokens i { font-style: normal; color: var(--text); }

.phases { display: flex; gap: 4px; margin: 14px 0 6px; }
.phases div {
  flex: 1; height: 3px; border-radius: 2px; background: var(--line);
  transition: background .3s;
}
.phases div.active { background: var(--accent); }
.phases div.past { background: color-mix(in srgb, var(--accent) 45%, transparent); }
.phase-names {
  display: flex; gap: 4px; font-size: 10.5px; color: var(--muted);
  text-transform: uppercase; letter-spacing: .04em;
}
.phase-names span { flex: 1; text-align: center; }
.phase-names span.active { color: var(--accent); }

/* ---- model picker ---- */
.model-row {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-top: 16px; font-size: 12.5px; color: var(--muted);
}
.model-row label { text-transform: uppercase; letter-spacing: .04em; font-size: 10.5px; }
.model-row select {
  flex: 0 1 auto; max-width: 100%;
  padding: 7px 10px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--panel);
  color: var(--text); font: inherit; font-size: 13px; cursor: pointer;
}
.model-row select:hover { border-color: var(--accent); }
/* The whole row hides when there is only one model to pick, rather than
   showing a select with a single option and no decision behind it. */
.model-row.solo { display: none; }
.model-row .small { flex: 1 1 100%; color: var(--muted); font-size: 11.5px; }
.model-row .warn { color: var(--med); }

/* ---- settings sheet ---- */
.iconbtn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 12px; border-radius: 9px;
  border: 1px solid var(--line); background: transparent;
  color: var(--muted); font: inherit; font-size: 13px; cursor: pointer;
}
.iconbtn:hover { border-color: var(--accent); color: var(--text); }
.iconbtn svg { width: 15px; height: 15px; }

.overlay {
  position: fixed; inset: 0; z-index: 50;
  display: flex; align-items: center; justify-content: center;
  padding: 20px; background: rgba(0, 0, 0, .45);
}
/* `.hidden` is declared earlier in this file, so at equal specificity the
   `display: flex` above wins and the sheet is stuck open. Qualifying it with
   the overlay class settles the tie the right way. */
.overlay.hidden { display: none; }
.sheet {
  width: 100%; max-width: 420px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
  max-height: calc(100vh - 40px); overflow-y: auto;
}
.sheet-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 18px;
}
.sheet-head b { font-size: 16px; }
.sheet-foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-top: 20px; padding-top: 14px;
  border-top: 1px solid var(--line);
}
.field {
  display: block; font-size: 11.5px; color: var(--muted);
  text-transform: uppercase; letter-spacing: .05em; margin-bottom: 6px;
}
.sheet select {
  width: 100%; padding: 9px 11px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--bg);
  color: var(--text); font: inherit;
}
.sheet select:focus { outline: none; border-color: var(--accent); }
.sheet .small { margin-top: 7px; color: var(--muted); font-size: 12.5px; }
.spend {
  font-size: 21px; font-weight: 600; letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.spend span { margin-right: 5px; }
.sheet .quota { margin-top: 8px; }

/* ---- confidence legend on the summary ---- */
.legend {
  margin: 18px 0 4px; padding: 14px;
  border: 1px solid var(--line); border-radius: 11px; background: var(--bg);
}
.legend-head {
  font-size: 11.5px; color: var(--muted);
  text-transform: uppercase; letter-spacing: .05em; margin-bottom: 10px;
}
.legend .bands { margin-bottom: 0; }
.legend .band { background: var(--panel); }
.legend-foot { margin-top: 10px; font-size: 12.5px; color: var(--muted); }