:root {
  --bg: #f7f4ec;
  --surface: #fffdf8;
  --surface-2: #f1ece0;
  --ink: #22302e;
  --ink-soft: #5b6b67;
  --line: #e3dcc9;
  --accent: #0f766e;
  --accent-ink: #ffffff;
  --accent-soft: #d7ebe7;
  --good: #2e7d43;
  --good-soft: #e2f2e5;
  --bad: #b3402e;
  --bad-soft: #fae4de;
  --warn: #a3681c;
  --warn-soft: #f9eeda;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(34, 48, 46, 0.06), 0 8px 24px -18px rgba(34, 48, 46, 0.25);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161b18;
    --surface: #1e2521;
    --surface-2: #26302b;
    --ink: #e8e6dc;
    --ink-soft: #a4b0aa;
    --line: #34413b;
    --accent: #3aa08f;
    --accent-ink: #10201c;
    --accent-soft: #24372f;
    --good: #7ec99a;
    --good-soft: #1e3526;
    --bad: #e3816e;
    --bad-soft: #3c221b;
    --warn: #dda55f;
    --warn-soft: #3a2f1a;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px -18px rgba(0, 0, 0, 0.6);
  }
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.9rem 1.2rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 650;
  font-size: 1.02rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.85rem;
  font-weight: 750;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  gap: 0.15rem;
  flex-wrap: wrap;
  margin-left: auto;
}

.nav-link {
  text-decoration: none;
  color: var(--ink-soft);
  padding: 0.4rem 0.7rem;
  border-radius: 9px;
  font-weight: 550;
  font-size: 0.95rem;
}

.nav-link:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.nav-link.active {
  background: var(--accent-soft);
  color: var(--ink);
  font-weight: 650;
}

.page {
  width: min(58rem, 100%);
  margin: 0 auto;
  padding: 1.6rem 1.2rem 2.5rem;
  flex: 1;
}

h1 {
  font-size: 1.55rem;
  line-height: 1.25;
  margin: 0.3rem 0 0.5rem;
  letter-spacing: -0.01em;
}

h2, h3 {
  line-height: 1.3;
  margin: 1.2rem 0 0.5rem;
}

.lede {
  color: var(--ink-soft);
  max-width: 46rem;
  margin: 0.2rem 0 1rem;
}

.muted {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.05rem 1.15rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

.card h3 {
  margin-top: 0.2rem;
}

.section-h {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.mode-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0.8rem;
  margin: 0.8rem 0 1.6rem;
}

.mode-card {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
}

.mode-card p {
  margin: 0.3rem 0 0;
  color: var(--ink-soft);
  font-size: 0.93rem;
}

.bank-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.bank-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.bank-name {
  font-size: 1.08rem;
  font-weight: 650;
}

.bank-ver {
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.bank-desc {
  color: var(--ink-soft);
  font-size: 0.93rem;
  margin: 0.35rem 0;
}

.bank-stats {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.bank-laststat {
  font-size: 0.9rem;
  margin-top: 0.35rem;
  color: var(--ink-soft);
}

.bank-due {
  margin-top: 0.35rem;
  color: var(--warn);
  font-size: 0.93rem;
}

.bank-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.8rem;
  padding-top: 0.7rem;
  border-top: 1px dashed var(--line);
}

.inline-label {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.select {
  font: inherit;
  font-size: 0.92rem;
  padding: 0.42rem 0.6rem;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
}

.btn {
  font: inherit;
  font-weight: 600;
  border-radius: 10px;
  border: 1px solid transparent;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: transform 0.06s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:active { transform: translateY(1px); }

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn:focus-visible,
.select:focus-visible,
.choice:focus-visible,
.input:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn-sm { padding: 0.32rem 0.75rem; font-size: 0.88rem; }

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn-primary:hover { filter: brightness(1.08); }

.btn-ghost {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost:hover { background: var(--surface-2); }

.btn-danger {
  background: transparent;
  color: var(--bad);
  border-color: var(--bad);
}

.btn-danger:hover { background: var(--bad-soft); }

.btn-exam {
  background: var(--warn-soft);
  color: var(--warn);
  border-color: var(--warn);
}

.btn-exam:hover { filter: brightness(1.04); }

.resume-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  background: var(--accent-soft);
  border-color: var(--accent);
  margin-bottom: 1.2rem;
}

.flash-banner {
  width: min(58rem, 100%);
  margin: 0.8rem auto 0;
  padding: 0.6rem 1rem;
  border-radius: 10px;
  background: var(--warn-soft);
  color: var(--ink);
  border: 1px solid var(--warn);
  font-size: 0.93rem;
}

.flash-banner:not(.hidden) { display: block; }

.hidden { display: none !important; }

.flex-spacer { flex: 1; }

.chip {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  padding: 0.14rem 0.5rem;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--ink-soft);
  border: 1px solid var(--line);
  vertical-align: middle;
}

.chip-mode { background: var(--accent-soft); border-color: var(--accent); color: var(--ink); }
.chip-cat { background: var(--accent-soft); color: var(--ink); border-color: transparent; }
.chip-diff { background: var(--surface-2); }
.chip-custom { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.chip-accent { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.chip-flag { background: var(--bad-soft); color: var(--bad); border-color: transparent; }
.chip-pass { background: var(--good-soft); color: var(--good); border-color: transparent; }
.chip-soft { background: var(--surface-2); }

.quiz-top {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}

.quiz-top-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  flex: 1;
}

.quiz-top-right { display: flex; align-items: center; }

.quiz-counter {
  font-size: 0.92rem;
  color: var(--ink-soft);
  font-weight: 600;
}

.timer {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
}

.timer-low { color: var(--bad); }

.progressbar {
  height: 7px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.progressbar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.25s ease;
}

.qcard { padding: 1.3rem 1.4rem 1.4rem; }

.qmeta {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 0.7rem;
}

.qtext {
  font-size: 1.12rem;
  font-weight: 640;
  margin: 0 0 1rem;
}

.choices {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.choice {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  text-align: left;
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 0.68rem 0.9rem;
  cursor: pointer;
  transition: border-color 0.12s ease, background 0.12s ease;
}

.choice:hover { border-color: var(--accent); background: var(--accent-soft); }

.choice.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.choice:disabled {
  cursor: default;
  opacity: 0.92;
}

.choice-letter {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.choice.selected .choice-letter {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.qactions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 1.05rem;
}

.exam-actions {
  justify-content: space-between;
}

.exam-nav-left,
.exam-nav-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.flags-note {
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.feedback {
  margin-top: 1.05rem;
  border-radius: 12px;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
}

.feedback:empty { display: none; }

.feedback-ok { background: var(--good-soft); border-color: var(--good); }

.feedback-bad { background: var(--bad-soft); border-color: var(--bad); }

.feedback-title { font-weight: 700; margin-bottom: 0.2rem; }

.feedback-sub { font-size: 0.92rem; color: var(--ink-soft); margin-bottom: 0.3rem; }

.feedback-answer { font-size: 0.95rem; margin: 0.3rem 0; }

.feedback-explain { margin-top: 0.45rem; font-size: 0.97rem; }

.feedback-actions { margin-top: 0.9rem; }

.refs {
  margin: 0.6rem 0 0.2rem;
  padding-left: 1.2rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.results-eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.results-score {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin: 0.3rem 0 0.4rem;
}

.results-pct {
  font-size: 2.6rem;
  font-weight: 780;
  letter-spacing: -0.02em;
}

.pill {
  font-size: 0.9rem;
  font-weight: 650;
  padding: 0.28rem 0.75rem;
  border-radius: 999px;
}

.pill-pass { background: var(--good-soft); color: var(--good); }
.pill-fail { background: var(--bad-soft); color: var(--bad); }
.pill-soft { background: var(--surface-2); color: var(--ink-soft); }

.results-line { color: var(--ink-soft); }

.results-encourage {
  margin-top: 0.4rem;
  max-width: 42rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

.table th {
  text-align: left;
  color: var(--ink-soft);
  font-weight: 650;
  border-bottom: 1px solid var(--line);
  padding: 0.35rem 0.55rem;
}

.table td {
  border-bottom: 1px solid var(--line);
  padding: 0.42rem 0.55rem;
  vertical-align: top;
}

.table tr:last-child td { border-bottom: none; }

.review-toggle > summary {
  cursor: pointer;
  font-weight: 650;
  padding: 0.6rem 1rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  list-style-position: inside;
}

.review-list {
  margin-top: 0.7rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.review-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

.review-item > summary {
  cursor: pointer;
  padding: 0.55rem 0.8rem;
  font-weight: 600;
  list-style-position: inside;
}

.review-ok > summary { border-left: 4px solid var(--good); }
.review-bad > summary { border-left: 4px solid var(--bad); }

.review-mark { font-weight: 800; margin-right: 0.2rem; }
.review-ok .review-mark { color: var(--good); }
.review-bad .review-mark { color: var(--bad); }

.review-body {
  padding: 0.4rem 1rem 0.9rem;
  border-top: 1px dashed var(--line);
}

.review-answers { margin: 0.5rem 0; font-size: 0.94rem; }

.review-correct { color: var(--good); font-weight: 650; }

.results-actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin: 1rem 0 0;
}

.review-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 0.9rem;
  margin: 0.7rem 0 1rem;
}

.histogram {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  margin: 0.8rem 0 0.3rem;
}

.hist-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
}

.hist-bar {
  width: 2.2rem;
  min-height: 2px;
  background: var(--accent);
  border-radius: 6px 6px 0 0;
}

.hist-count { font-size: 0.85rem; font-weight: 650; }

.hist-label { font-size: 0.8rem; color: var(--ink-soft); }

.bank-picker {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0.4rem 0 1rem;
}

.bank-picker label {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.link-q {
  font: inherit;
  font-size: 0.93rem;
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  padding: 0;
  text-align: left;
}

.link-q:hover { text-decoration: underline; }

.ref-correct { color: var(--good); font-weight: 650; }

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 0.8rem;
  margin: 0.6rem 0 1.2rem;
}

.stat { text-align: center; }

.stat-num {
  font-size: 1.7rem;
  font-weight: 750;
  letter-spacing: -0.02em;
}

.stat-label {
  color: var(--ink-soft);
  font-size: 0.83rem;
  margin-top: 0.1rem;
}

.danger-zone h3 { margin-top: 0; }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 26, 24, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.2rem;
  z-index: 50;
}

.modal {
  width: min(30rem, 100%);
  max-height: 84vh;
  overflow: auto;
  margin: 0;
  background: var(--surface);
}

.modal h3 { margin-top: 0.1rem; }

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 0.9rem;
}

.modal-q { font-weight: 650; }

.ack-shake { animation: shake 0.4s ease; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.input {
  font: inherit;
  width: 100%;
  padding: 0.5rem 0.65rem;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
}

.input-mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  line-height: 1.45;
  resize: vertical;
}

.import-grid {
  display: grid;
  grid-template-columns: minmax(11rem, 18rem) 1fr;
  gap: 0.9rem;
  align-items: start;
}

@media (max-width: 46rem) {
  .import-grid { grid-template-columns: 1fr; }
}

.import-btns {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.6rem;
  flex-wrap: wrap;
}

.import-result { margin-top: 0.7rem; }

.import-ok {
  background: var(--good-soft);
  border: 1px solid var(--good);
  color: var(--ink);
  border-radius: 10px;
  padding: 0.55rem 0.8rem;
  font-size: 0.93rem;
}

.import-error {
  background: var(--bad-soft);
  border: 1px solid var(--bad);
  border-radius: 10px;
  padding: 0.55rem 0.8rem;
  font-size: 0.93rem;
}

.import-error ul { margin: 0.3rem 0 0; padding-left: 1.2rem; }

.plainlist {
  margin: 0.3rem 0 0;
  padding-left: 1.2rem;
}

.plainlist li { margin-bottom: 0.35rem; }

.import-cta {
  margin-top: 1.2rem;
  color: var(--ink-soft);
}

.ack-note {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.disclaimer-bar {
  border-top: 3px solid var(--accent);
  background: var(--surface);
  padding: 0.9rem 1.2rem 1.1rem;
  font-size: 0.87rem;
  color: var(--ink-soft);
}

.disclaimer-bar p { max-width: 58rem; margin: 0.25rem auto; }

.disclaimer-bar strong { color: var(--ink); }

.footer-meta { font-size: 0.8rem; }

.footer-meta a { color: var(--accent); }

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

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

@media print {
  .site-header, .site-nav, .btn, .disclaimer-bar { display: none; }
  .card { box-shadow: none; }
}