:root {
  --bg: #f2f3f4;
  --ink: #1c2430;
  --muted: #8b9198;
  --gold: #d19d27;
  --gold-deep: #c99612;
  --pill: #e3b133;
  --card: #fff;
  --dim: #d5d8dc;
  --ok: #2f9e44;
  --ng: #c4523a;
  --shadow: 0 8px 22px rgba(28, 36, 48, 0.06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--ink);
  background: #e4e6e8;
  line-height: 1.6;
}

button { font-family: inherit; cursor: pointer; }

.screen {
  width: min(480px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  background: var(--bg);
  padding: 16px 20px 36px;
}

.drill-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
}

.close {
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  color: #9aa1a8;
  font-size: 22px;
  line-height: 1;
  box-shadow: 0 4px 14px rgba(28, 36, 48, 0.08);
  flex: none;
}

.series { text-align: right; margin-left: auto; }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: #b9a06a;
  font-size: 12px;
  font-weight: 700;
}

.spark {
  width: 12px;
  height: 12px;
  background: conic-gradient(from 20deg, #e3b133, #f6e7b2, #e3b133);
  clip-path: polygon(50% 0, 62% 38%, 100% 50%, 62% 62%, 50% 100%, 38% 62%, 0 50%, 38% 38%);
}

.series-name {
  color: #6e757c;
  font-size: 14px;
  font-weight: 700;
}

.qcount {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 18px 0 12px;
}

.qpill {
  background: var(--pill);
  color: #fff;
  font-weight: 800;
  font-size: 15px;
  border-radius: 8px;
  padding: 2px 8px 3px;
  letter-spacing: 0.02em;
}

.qtotal {
  font-weight: 800;
  font-size: 16px;
}

.qbook {
  margin-left: auto;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.prompt {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  line-height: 1.55;
  letter-spacing: 0.01em;
}

.prompt.long {
  font-size: 18px;
}

.hint {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 14px 0 18px;
  color: #a0a6ad;
  font-size: 13px;
}

.hint i {
  width: 16px;
  height: 16px;
  border: 1.5px solid #c5ccd2;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  font-style: normal;
  font-size: 11px;
  font-weight: 700;
  color: #aeb6bd;
}

.choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.choices.col {
  grid-template-columns: 1fr;
  gap: 10px;
}

.choice {
  position: relative;
  background: var(--card);
  border: 2px solid transparent;
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 22px 10px 16px;
  color: var(--ink);
}

.choice:hover:not(:disabled) { transform: translateY(-1px); }

.choice:disabled { cursor: default; }

.symbol {
  width: 92px;
  height: 92px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: var(--gold);
  display: grid;
  place-items: center;
  position: relative;
}

.ring {
  width: 40px;
  height: 40px;
  border: 4px solid #fff;
  border-radius: 50%;
}

.cross { position: relative; }

.cross b {
  position: absolute;
  width: 36px;
  height: 5px;
  border-radius: 4px;
  background: #fff;
  left: 50%;
  top: 50%;
}

.cross b:first-child { transform: translate(-50%, -50%) rotate(45deg); }
.cross b:last-child { transform: translate(-50%, -50%) rotate(-45deg); }

.choice-label {
  display: block;
  font-size: 15px;
  font-weight: 800;
}

.choice.is-dim .symbol { background: var(--dim); }
.choice.is-dim .choice-label { color: #c5c9ce; }
.choice.is-picked { border-color: var(--gold); }

.choice.text {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  text-align: left;
  padding: 14px 16px;
  border-radius: 16px;
}

.choice-no {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--gold);
  color: #fff;
  display: grid;
  place-items: center;
  flex: none;
  font-size: 14px;
  font-weight: 800;
}

.choice.text .choice-label {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  padding-top: 2px;
}

.choice.text.is-correct { border-color: var(--ok); }
.choice.text.is-correct .choice-no { background: var(--ok); }
.choice.text.is-wrong { border-color: var(--ng); }
.choice.text.is-wrong .choice-no { background: var(--ng); }
.choice.text.is-dim .choice-no { background: var(--dim); }
.choice.text.is-dim .choice-label { color: #9aa1a8; }

.statements {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.statements li {
  background: #fff;
  border-radius: 14px;
  padding: 12px 14px;
  box-shadow: var(--shadow);
  font-weight: 700;
  line-height: 1.65;
}

.statements b {
  color: var(--gold-deep);
  margin-right: 6px;
}

.submit { width: 100%; margin-top: 16px; }

.answer-no {
  margin-left: auto;
  color: var(--ink);
  font-size: 14px;
}

.explain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.explain-lead {
  margin: 0 0 10px;
  font-weight: 800;
}

.mark {
  font-size: 12px;
  font-weight: 800;
  margin-bottom: 4px;
}

.mark.good { color: var(--ok); }
.mark.bad { color: var(--ng); }

.explain p {
  margin: 0;
  font-weight: 700;
  font-size: 14px;
  line-height: 1.7;
}

.key-choices {
  margin: 8px 0 12px;
  padding-left: 1.2em;
}

.key-choices li {
  margin: 4px 0;
  font-weight: 700;
  line-height: 1.6;
}

.key-row .statements { margin-top: 8px; }
.key-row .statements li { box-shadow: none; background: #f6f7f8; }

.badge {
  display: none;
  position: absolute;
  top: -8px;
  right: -8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 8px rgba(28, 36, 48, 0.12);
  place-items: center;
}

.choice.is-picked .badge { display: grid; }

.badge svg { display: block; }

.feedback {
  margin: 22px -20px 0;
  padding: 8px 20px 8px;
  background: linear-gradient(#f6f3ee, #f3efe8 40%, #f2f3f4);
}

.verdict {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 800;
  margin: 4px 0 12px;
}

.verdict.good { color: var(--ok); }
.verdict.bad { color: var(--ng); }

.vmark {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 14px;
}

.verdict.good .vmark { background: var(--ok); }
.verdict.bad .vmark { background: var(--ng); }

.point {
  background: #fff;
  border-radius: 16px;
  padding: 16px 16px 14px;
  box-shadow: 0 6px 18px rgba(28, 36, 48, 0.05);
}

.point-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-weight: 800;
  font-size: 16px;
}

.point p {
  margin: 0 0 10px;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.75;
}

.point p:last-child { margin-bottom: 0; }

.next {
  width: 100%;
  margin-top: 16px;
  border: 0;
  background: #fff;
  color: var(--ink);
  border-radius: 16px;
  padding: 16px 12px;
  font-size: 16px;
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(28, 36, 48, 0.08);
}

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

.home-lead {
  margin: 22px 0 8px;
  font-size: 22px;
  font-weight: 800;
  line-height: 1.4;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 14px 0 16px;
}

.stat {
  background: #fff;
  border-radius: 14px;
  padding: 12px 10px;
  box-shadow: var(--shadow);
}

.stat b {
  display: block;
  font-size: 22px;
  line-height: 1.1;
}

.stat span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 18px;
}

.btn {
  border: 0;
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 800;
  background: var(--gold);
  color: #fff;
  box-shadow: var(--shadow);
}

.btn.secondary {
  background: #fff;
  color: var(--ink);
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.chapters { display: flex; flex-direction: column; gap: 10px; }

.chapter {
  text-align: left;
  background: #fff;
  border: 0;
  border-radius: 16px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
  color: inherit;
}

.chapter .num {
  color: var(--gold-deep);
  font-size: 12px;
  font-weight: 800;
}

.chapter strong {
  display: block;
  margin: 2px 0 8px;
  font-size: 16px;
  line-height: 1.45;
}

.bar {
  height: 6px;
  background: #eceff1;
  border-radius: 99px;
  overflow: hidden;
}

.bar > i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--gold);
}

.chapter small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.linkish {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  padding: 14px 0 0;
}

.score {
  font-size: 56px;
  font-weight: 800;
  line-height: 1;
  margin: 18px 0 4px;
}

.score span { font-size: 22px; color: var(--muted); }

.wrong-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.wrong-list li {
  background: #fff;
  border-radius: 16px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.wrong-list .q { font-weight: 800; margin: 4px 0; }

.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  color: var(--ng);
}

.footer-note {
  color: var(--muted);
  font-size: 12px;
  margin-top: 16px;
}

.screen.wide { width: min(760px, 100%); }

.key-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin: 16px 0 8px;
  padding-bottom: 4px;
}

.key-tab {
  border: 0;
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 800;
  box-shadow: var(--shadow);
  flex: none;
}

.key-tab.is-on {
  background: var(--gold);
  color: #fff;
}

.key-count {
  margin: 8px 0 12px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.key-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.key-row {
  display: flex;
  gap: 12px;
  background: #fff;
  border-radius: 16px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.key-mark {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  flex: none;
}

.key-mark.yes { background: var(--ok); }
.key-mark.no { background: var(--gold); }

.key-no {
  font-size: 13px;
  font-weight: 800;
  color: var(--gold-deep);
}

.key-prompt {
  margin: 4px 0 6px;
  font-weight: 800;
  line-height: 1.6;
}

.key-note {
  margin: 0;
  color: #4d5660;
  font-size: 13px;
  line-height: 1.7;
}

@media (min-width: 520px) {
  body { padding: 24px 0 40px; }
  .screen {
    min-height: calc(100vh - 64px);
    border-radius: 28px;
    box-shadow: 0 16px 40px rgba(28, 36, 48, 0.08);
  }
}