/* ============================================================
   GHA Simulator — Google-flavored light UI
   Unofficial practice tool. Roboto + Material-ish tokens.
   ============================================================ */

:root {
  color-scheme: light;
  /* ink */
  --ink: #202124;
  --ink-2: #5f6368;
  --ink-3: #80868b;
  /* surfaces */
  --page: #f8f9fa;
  --card: #ffffff;
  --line: #dadce0;
  --line-soft: #e8eaed;
  /* accent (Google blue) */
  --blue: #1a73e8;
  --blue-dark: #1765cc;
  --blue-tint: #e8f0fe;
  --blue-tint-2: #d2e3fc;
  /* status (icon + label always accompany color) */
  --good: #188038;      --good-text: #137333;  --good-tint: #e6f4ea;
  --warn: #ea8600;      --warn-text: #994c00;  --warn-tint: #fef7e0;
  --bad:  #d93025;      --bad-text:  #a50e0e;  --bad-tint:  #fce8e6;
  /* brand dots */
  --g-blue: #4285f4; --g-red: #ea4335; --g-yellow: #fbbc04; --g-green: #34a853;

  --radius: 8px;
  --shadow: 0 1px 2px rgba(60,64,67,.14), 0 1px 3px 1px rgba(60,64,67,.08);
  --font: "Roboto", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--page);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- App bar ---------- */
.appbar {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  padding: 0 20px; height: 60px;
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 10px; cursor: pointer; user-select: none; }
.glogo { display: grid; grid-template-columns: 9px 9px; grid-gap: 2px; }
.glogo .d { width: 9px; height: 9px; border-radius: 50%; display: block; }
.d.b { background: var(--g-blue); } .d.r { background: var(--g-red); }
.d.y { background: var(--g-yellow); } .d.g { background: var(--g-green); }
.brand-text { font-size: 17px; color: var(--ink-2); letter-spacing: .1px; white-space: nowrap; }
.brand-text b { color: var(--ink); font-weight: 500; }
.appbar-right { display: flex; align-items: center; gap: 14px; }
.hud { font-size: 13px; color: var(--ink-2); }
.hud-timer { font-variant-numeric: tabular-nums; font-weight: 500; color: var(--ink); }
.hud-timer.overtime { color: var(--bad-text); }

/* ---------- Progress ---------- */
.progress-track { height: 4px; background: var(--blue-tint); position: sticky; top: 60px; z-index: 19; }
.progress-fill { height: 100%; width: 0%; background: var(--blue); transition: width .25s ease; }

/* ---------- Layout ---------- */
.view { flex: 1; width: 100%; max-width: 780px; margin: 0 auto; padding: 28px 20px 48px; }
.view.wide { max-width: 1000px; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 32px; margin-bottom: 20px;
}
.card.elevated { box-shadow: var(--shadow); border-color: var(--line-soft); }

h1 { font-size: 26px; font-weight: 400; margin: 0 0 6px; }
h2 { font-size: 19px; font-weight: 500; margin: 0 0 12px; }
h3 { font-size: 15px; font-weight: 500; margin: 18px 0 8px; }
p.lead { color: var(--ink-2); font-size: 15px; margin-top: 0; }
.muted { color: var(--ink-2); }
.small { font-size: 13px; }
.tiny { font-size: 12px; color: var(--ink-3); }
hr.soft { border: 0; border-top: 1px solid var(--line-soft); margin: 20px 0; }

/* ---------- Chips ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 500; letter-spacing: .2px;
  padding: 3px 10px; border-radius: 999px; white-space: nowrap;
}
.chip-neutral { background: var(--page); color: var(--ink-2); border: 1px solid var(--line); }
.chip-blue { background: var(--blue-tint); color: var(--blue-dark); }
.st { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 500; padding: 3px 10px; border-radius: 999px; }
.st .ic { font-weight: 700; }
.st-good { background: var(--good-tint); color: var(--good-text); }
.st-part { background: var(--warn-tint); color: var(--warn-text); }
.st-miss { background: var(--bad-tint); color: var(--bad-text); }

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--font); font-size: 14px; font-weight: 500; letter-spacing: .2px;
  border-radius: 6px; padding: 10px 24px; cursor: pointer; border: 1px solid transparent;
  transition: background .15s ease, box-shadow .15s ease;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); box-shadow: var(--shadow); }
.btn-primary:disabled { background: var(--line-soft); color: var(--ink-3); cursor: default; box-shadow: none; }
.btn-outline { background: var(--card); color: var(--blue-dark); border-color: var(--line); }
.btn-outline:hover { background: var(--blue-tint); }
.btn-text { background: transparent; color: var(--blue-dark); padding: 8px 12px; }
.btn-text:hover { background: var(--blue-tint); }
.btn-row { display: flex; gap: 12px; align-items: center; margin-top: 24px; flex-wrap: wrap; }
.btn-row .spacer { flex: 1; }

.hidden { display: none !important; }

/* ---------- Home ---------- */
.hero { text-align: left; padding: 34px 36px; }
.mode-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 18px; }
.mode-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; cursor: pointer; background: var(--card);
  transition: border-color .15s, box-shadow .15s; position: relative;
}
.mode-card:hover { border-color: var(--blue); box-shadow: var(--shadow); }
.mode-card h2 { font-size: 16px; margin-bottom: 6px; }
.mode-card p { font-size: 13px; color: var(--ink-2); margin: 0 0 12px; }
.mode-card .meta { font-size: 12px; color: var(--ink-3); }
.mode-card .rec { position: absolute; top: -9px; right: 12px; }

.settings-row { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 6px; }
.setting { display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--ink-2); }
.setting select, .setting input[type="checkbox"] {
  font-family: var(--font); font-size: 13.5px; accent-color: var(--blue);
}
.setting select { border: 1px solid var(--line); border-radius: 4px; padding: 4px 8px; background: var(--card); color: var(--ink); }

.history-table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin-top: 8px; }
.history-table th { text-align: left; color: var(--ink-2); font-weight: 500; padding: 8px 10px; border-bottom: 1px solid var(--line); }
.history-table td { padding: 8px 10px; border-bottom: 1px solid var(--line-soft); font-variant-numeric: tabular-nums; }

/* ---------- Instructions ---------- */
.notice {
  border: 1px solid var(--line); border-left: 4px solid var(--blue);
  border-radius: 6px; padding: 14px 18px; background: var(--card);
  margin: 14px 0; font-size: 14px;
}
.notice.warn { border-left-color: var(--warn); background: var(--warn-tint); }
ul.spec { margin: 8px 0 0; padding-left: 22px; }
ul.spec li { margin: 6px 0; }
.agree { display: flex; gap: 10px; align-items: flex-start; margin-top: 18px; font-size: 14px; }
.agree input { margin-top: 3px; accent-color: var(--blue); width: 16px; height: 16px; }

/* ---------- Exam ---------- */
.q-meta { font-size: 12.5px; letter-spacing: .8px; text-transform: uppercase; color: var(--ink-3); margin-bottom: 14px; display: flex; gap: 10px; align-items: center; }
.q-text { font-size: 19px; line-height: 1.5; font-weight: 400; margin: 0 0 26px; }
.scenario { font-size: 15.5px; line-height: 1.65; margin: 0 0 22px; color: var(--ink); }

/* Likert */
.likert { display: flex; justify-content: space-between; gap: 6px; margin-top: 8px; }
.likert label {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 16px 6px 14px; border: 1px solid var(--line); border-radius: 6px;
  cursor: pointer; text-align: center; font-size: 12.5px; color: var(--ink-2);
  transition: border-color .12s, background .12s;
}
.likert label:hover { border-color: var(--blue); }
.likert label.sel { border-color: var(--blue); background: var(--blue-tint); color: var(--ink); font-weight: 500; }
.likert input { accent-color: var(--blue); width: 18px; height: 18px; margin: 0; }

/* Most/Least grids (triples + SJT) */
.ml-table { width: 100%; border-collapse: separate; border-spacing: 0; }
.ml-table th {
  font-size: 12px; font-weight: 500; letter-spacing: .4px; color: var(--ink-2);
  text-transform: uppercase; padding: 6px 10px; text-align: center; width: 88px;
}
.ml-table th.stmt-h { text-align: left; width: auto; }
.ml-table td { border-top: 1px solid var(--line-soft); padding: 14px 10px; vertical-align: middle; }
.ml-table td.stmt { font-size: 15px; line-height: 1.5; }
.ml-table td.pick { text-align: center; }
.ml-table tr:hover td { background: #fafbff; }
.ml-table input { accent-color: var(--blue); width: 18px; height: 18px; cursor: pointer; }
.ml-hint { font-size: 13px; color: var(--ink-2); margin: 4px 0 14px; }
.ml-err { color: var(--bad-text); font-size: 13px; margin-top: 10px; min-height: 18px; }

/* Drill feedback */
.feedback { border-top: 1px solid var(--line-soft); margin-top: 22px; padding-top: 18px; }
.feedback h3 { margin-top: 0; }
.fb-row { display: flex; gap: 8px; align-items: flex-start; margin: 8px 0; font-size: 14px; }
.fb-row .ic { flex: 0 0 auto; font-weight: 700; }

/* ---------- Results ---------- */
.tile-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; }
.tile .t-label { font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }
.tile .t-value { font-size: 32px; font-weight: 500; line-height: 1.1; }
.tile .t-sub { font-size: 12.5px; color: var(--ink-3); margin-top: 6px; }

.verdict-band { border-radius: var(--radius); padding: 22px 26px; margin-bottom: 20px; border: 1px solid var(--line); background: var(--card); display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.verdict-band .big { font-size: 44px; font-weight: 500; }
.verdict-band .vb-text { flex: 1; min-width: 240px; }

/* Trait meters — single-series, blue fill on blue-tint track, value label in ink */
.meter-row { display: grid; grid-template-columns: 220px 1fr 52px; gap: 14px; align-items: center; margin: 9px 0; }
.meter-row .m-label { font-size: 13.5px; color: var(--ink); text-align: right; }
.meter { height: 12px; background: var(--blue-tint); border-radius: 6px; overflow: hidden; }
.meter > i { display: block; height: 100%; background: var(--blue); border-radius: 0 4px 4px 0; }
.meter.low > i { background: var(--warn); }
.meter-row .m-val { font-size: 13px; font-variant-numeric: tabular-nums; color: var(--ink-2); }

/* Flag list */
.flag { display: flex; gap: 10px; align-items: flex-start; padding: 12px 14px; border: 1px solid var(--line-soft); border-radius: 6px; margin: 10px 0; font-size: 14px; }
.flag .ic { font-weight: 700; }
.flag.f-warn { background: var(--warn-tint); border-color: #f6e3b4; }
.flag.f-bad { background: var(--bad-tint); border-color: #f3c1bd; }
.flag.f-good { background: var(--good-tint); border-color: #c4e7cf; }
.flag .f-body b { font-weight: 500; }

/* Review accordions */
details.rev { border: 1px solid var(--line); border-radius: 6px; margin: 10px 0; background: var(--card); }
details.rev summary {
  cursor: pointer; padding: 13px 16px; font-size: 14px; display: flex; gap: 10px; align-items: center;
  list-style: none;
}
details.rev summary::-webkit-details-marker { display: none; }
details.rev summary .sum-text { flex: 1; }
details.rev[open] summary { border-bottom: 1px solid var(--line-soft); }
.rev-body { padding: 14px 18px 18px; font-size: 14px; }
.opt {
  border: 1px solid var(--line-soft); border-radius: 6px; padding: 10px 14px; margin: 8px 0;
  display: flex; gap: 10px; align-items: flex-start;
}
.opt.best { border-left: 4px solid var(--good); }
.opt.worst { border-left: 4px solid var(--bad); }
.opt .tags { margin-left: auto; display: flex; gap: 6px; flex: 0 0 auto; flex-wrap: wrap; }
.why { background: var(--page); border-radius: 6px; padding: 10px 14px; margin-top: 10px; font-size: 13.5px; color: var(--ink-2); }
.why b { color: var(--ink); font-weight: 500; }

/* Guide */
.guide h2 { margin-top: 26px; }
.guide table { border-collapse: collapse; width: 100%; font-size: 13.5px; margin: 10px 0; }
.guide th, .guide td { border: 1px solid var(--line-soft); padding: 8px 12px; text-align: left; vertical-align: top; }
.guide th { background: var(--page); font-weight: 500; }
kbd.key { background: var(--page); border: 1px solid var(--line); border-radius: 4px; padding: 1px 7px; font-size: 12px; font-family: inherit; }

/* ---------- Footer ---------- */
.foot { border-top: 1px solid var(--line-soft); background: var(--card); padding: 14px 24px; }
.foot p { max-width: 1000px; margin: 0 auto; font-size: 12px; color: var(--ink-3); }

/* ---------- Responsive ---------- */
@media (max-width: 680px) {
  .card { padding: 20px; }
  .brand-text { display: none; }
  .likert { flex-direction: column; }
  .likert label { flex-direction: row; justify-content: flex-start; padding: 12px 14px; font-size: 14px; }
  .meter-row { grid-template-columns: 1fr; gap: 4px; }
  .meter-row .m-label { text-align: left; }
  .ml-table th, .ml-table td.pick { width: 64px; }
}