:root {
  --ink: #16201c;
  --ink-soft: #4a554f;
  --paper: #f3f2ec;
  --panel: #ffffff;
  --line: #dcdad0;
  --line-strong: #c3c1b5;
  --ok: #0f8a6a;
  --ok-bg: #e6f4ee;
  --fail: #c2362f;
  --fail-bg: #fae9e7;
  --warn: #b07a10;
  --warn-bg: #faf1dc;
  --accent: #1f6f5c;
  --mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px 80px; }

/* ---- Header ---- */
header.top {
  border-bottom: 1px solid var(--line-strong);
  background: var(--panel);
}
header.top .wrap {
  padding-top: 18px;
  padding-bottom: 18px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: flex; align-items: baseline; gap: 12px; }
.brand h1 {
  font-size: 20px;
  letter-spacing: 0.02em;
  margin: 0;
  font-weight: 650;
}
.brand .tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border: 1px solid var(--line-strong);
  padding: 2px 7px;
  border-radius: 2px;
}
nav.tabs { display: flex; gap: 4px; }
nav.tabs button {
  font-family: var(--sans);
  font-size: 13px;
  background: none;
  border: none;
  color: var(--ink-soft);
  padding: 6px 12px;
  cursor: pointer;
  border-radius: 4px;
}
nav.tabs button.active { color: var(--ink); background: var(--paper); font-weight: 600; }

/* ---- Drop zone (signature: sample tray) ---- */
.dropzone {
  margin-top: 28px;
  background: var(--panel);
  border: 1.5px dashed var(--line-strong);
  border-radius: 8px;
  padding: 44px 24px;
  text-align: center;
  transition: border-color .15s, background .15s;
  cursor: pointer;
}
.dropzone.hover { border-color: var(--accent); background: #f0f7f4; }
.dropzone .icon {
  width: 46px; height: 46px; margin: 0 auto 12px;
  border: 1.5px solid var(--line-strong); border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 11px; color: var(--ink-soft);
  letter-spacing: .08em;
}
.dropzone h2 { margin: 0 0 4px; font-size: 16px; font-weight: 600; }
.dropzone p { margin: 0; color: var(--ink-soft); font-size: 13px; }
.dropzone input[type=file] { display: none; }

/* ---- Verdict banner ---- */
.verdict {
  margin-top: 24px;
  border-radius: 8px;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 18px;
  border: 1px solid var(--line);
}
.verdict .badge {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: .06em;
  padding: 8px 16px;
  border-radius: 4px;
}
.verdict.pass { background: var(--ok-bg); border-color: #bfe0d2; }
.verdict.pass .badge { background: var(--ok); color: #fff; }
.verdict.fail { background: var(--fail-bg); border-color: #eecac6; }
.verdict.fail .badge { background: var(--fail); color: #fff; }
.verdict .meta { font-size: 13px; color: var(--ink-soft); }
.verdict .meta strong { color: var(--ink); }
.verdict .counts { margin-left: auto; display: flex; gap: 18px; font-size: 13px; }
.verdict .counts b { font-family: var(--mono); font-size: 16px; display: block; }

/* ---- Header field grid ---- */
.fieldgrid {
  margin-top: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 20px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px 28px;
}
.fieldgrid .f { font-size: 13px; }
.fieldgrid .f .k {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.fieldgrid .f .v { font-weight: 500; word-break: break-word; }

/* ---- Warnings ---- */
.warnbox {
  margin-top: 16px;
  background: var(--warn-bg);
  border: 1px solid #ecd9a8;
  border-radius: 8px;
  padding: 12px 18px;
  font-size: 13px;
}
.warnbox h3 { margin: 0 0 6px; font-size: 13px; color: var(--warn); }
.warnbox ul { margin: 0; padding-left: 18px; }

/* ---- Results table ---- */
.tablecard {
  margin-top: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
table { width: 100%; border-collapse: collapse; }
thead th {
  text-align: left;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 11px 14px;
  border-bottom: 1px solid var(--line-strong);
  background: #fbfbf8;
}
tbody td { padding: 10px 14px; border-bottom: 1px solid var(--line); font-size: 14px; }
tbody tr:last-child td { border-bottom: none; }
td.num, th.num { font-family: var(--mono); text-align: right; white-space: nowrap; }
td.name { font-weight: 500; }
tbody tr.row-LOW, tbody tr.row-HIGH { background: var(--fail-bg); }
tbody tr.row-NA { background: #fafafa; }

.result-pill {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  padding: 2px 8px;
  border-radius: 3px;
}
.result-OK { color: var(--ok); background: var(--ok-bg); }
.result-LOW, .result-HIGH { color: #fff; background: var(--fail); }
.result-NA { color: var(--ink-soft); background: #eceae2; }

/* value-vs-range mini bar (signature element) */
.range-bar { width: 120px; height: 18px; position: relative; }
.range-bar .track {
  position: absolute; top: 8px; left: 0; right: 0; height: 2px; background: var(--line-strong);
}
.range-bar .span {
  position: absolute; top: 6px; height: 6px; background: #cfe6dc; border-radius: 2px;
}
.range-bar .mark {
  position: absolute; top: 2px; width: 2px; height: 14px; background: var(--ink);
}
.range-bar .mark.bad { background: var(--fail); }

/* ---- History ---- */
.section-title { margin: 28px 0 10px; font-size: 15px; font-weight: 650; }
.statline { display: flex; gap: 24px; margin-bottom: 14px; font-size: 13px; color: var(--ink-soft); }
.statline b { font-family: var(--mono); color: var(--ink); font-size: 18px; display:block; }

.hist-row { cursor: pointer; }
.hist-row:hover td { background: #f4f8f6; }
.mini-overall { font-family: var(--mono); font-weight: 700; font-size: 11px; }
.mini-PASS { color: var(--ok); }
.mini-FAIL { color: var(--fail); }

/* ---- Trend chart ---- */
.controls { display: flex; gap: 10px; align-items: center; margin: 14px 0; flex-wrap: wrap; }
.controls select, .controls button {
  font-family: var(--sans); font-size: 13px; padding: 6px 10px;
  border: 1px solid var(--line-strong); border-radius: 5px; background: var(--panel);
}
.controls button { cursor: pointer; }
.chartcard { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 16px; }
.chartcard svg { width: 100%; height: auto; display: block; }

.empty { color: var(--ink-soft); font-size: 14px; padding: 24px 0; }
.hidden { display: none; }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: 10px 18px; border-radius: 6px;
  font-size: 13px; opacity: 0; transition: opacity .2s; pointer-events: none;
}
.toast.show { opacity: 1; }

footer.foot { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 12px; }

@media (max-width: 640px) {
  .verdict { flex-wrap: wrap; }
  .verdict .counts { margin-left: 0; width: 100%; }
  .range-bar { display: none; }
}