:root {
  --ink: #121937;
  --paper: #f6f7fb;
  --white: #ffffff;
  --electric: #5b5ff2;
  --acid: #f1ff4e;
  --cyan: #bdeffc;
  --muted: #686d80;
  --line: #cfd2df;
  --success: #147a55;
  --danger: #b73f51;
  font-family: Pretendard, "Noto Sans KR", "Apple SD Gothic Neo", Inter, system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(rgba(18, 25, 55, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 25, 55, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 36px 36px;
  font-size: 1rem;
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
:focus-visible { outline: 3px solid var(--electric); outline-offset: 3px; }
[hidden] { display: none !important; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  transform: translateY(-180%);
  border: 2px solid var(--ink);
  background: var(--acid);
  font-weight: 900;
}
.skip-link:focus { transform: translateY(0); }

.quiz-header {
  position: sticky;
  z-index: 50;
  top: 0;
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  padding: 0 4vw;
  border-bottom: 1px solid rgba(18, 25, 55, 0.18);
  background: rgba(246, 247, 251, 0.94);
  backdrop-filter: blur(18px);
}

.brand { display: inline-flex; align-items: center; gap: 0.75rem; font-weight: 950; letter-spacing: -0.035em; }
.brand-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: 0.65rem;
  color: var(--acid);
  background: var(--ink);
  font-family: serif;
}
.header-link { font-size: 0.88rem; font-weight: 850; }

.quiz-shell { width: min(980px, calc(100% - 2rem)); margin: 0 auto; }
.quiz-hero { padding: clamp(4rem, 10vw, 8rem) 0 clamp(3rem, 7vw, 5rem); }
.eyebrow, .section-number {
  margin: 0;
  color: var(--electric);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.14em;
}
.quiz-hero h1 {
  margin: 1.4rem 0;
  font-size: clamp(3.2rem, 9vw, 7.4rem);
  line-height: 0.98;
  letter-spacing: -0.07em;
}
.quiz-hero > p:not(.eyebrow) { max-width: 42rem; margin: 0; color: var(--muted); font-size: 1.08rem; }
.quiz-meta { display: flex; gap: 0.7rem; margin-top: 2rem; flex-wrap: wrap; }
.quiz-meta span { padding: 0.65rem 0.9rem; border: 1px solid var(--ink); border-radius: 999px; background: var(--white); }
.quiz-meta strong { color: var(--electric); }

.progress-wrap {
  position: sticky;
  z-index: 40;
  top: 76px;
  padding: 0.85rem 1rem;
  border: 1px solid var(--ink);
  background: var(--white);
  box-shadow: 5px 5px 0 var(--ink);
}
.progress-copy { display: flex; justify-content: space-between; margin-bottom: 0.55rem; font-size: 0.82rem; font-weight: 900; }
.progress-track { height: 0.5rem; overflow: hidden; background: #e6e7ee; }
.progress-track span { display: block; width: 0; height: 100%; background: var(--electric); transition: width 180ms ease; }

#quiz-form { padding: 4rem 0 1rem; }
.identity-card {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 2rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--ink);
  background: var(--cyan);
}
.identity-card h2, .section-heading h2, .submit-card h2, .result-card h2 {
  margin: 0.4rem 0;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.055em;
}
.identity-card p { margin: 0.7rem 0 0; color: #4e5668; }
.identity-fields { display: grid; gap: 1rem; align-content: center; }
.identity-fields label { display: grid; gap: 0.4rem; font-size: 0.86rem; font-weight: 900; }
.identity-fields input, .fill-card input, .admin-input {
  width: 100%;
  min-height: 3.25rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--white);
  color: var(--ink);
}

.question-section { padding-top: 5rem; }
.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}
.section-heading > p { max-width: 28rem; margin: 0; color: var(--muted); }

.question-card {
  min-width: 0;
  margin: 1rem 0;
  padding: clamp(1.2rem, 3vw, 2rem);
  border: 1px solid var(--line);
  background: var(--white);
  transition: border-color 180ms ease, box-shadow 180ms ease;
}
.question-card:focus-within { border-color: var(--electric); box-shadow: 0 0 0 3px rgba(91, 95, 242, 0.13); }
.question-card legend { width: 100%; padding: 0 0 1.2rem; font-size: 1.08rem; font-weight: 900; line-height: 1.5; }
.question-card legend > span { display: inline-grid; width: 2rem; height: 2rem; place-items: center; margin-right: 0.5rem; border-radius: 50%; background: var(--ink); color: var(--white); font-size: 0.75rem; }
.question-card > label { display: block; position: relative; margin: 0.55rem 0; cursor: pointer; }
.question-card input[type="radio"] { position: absolute; width: 1px; height: 1px; opacity: 0; }
.question-card label > span {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  background: var(--paper);
}
.question-card label > span b { color: var(--electric); }
.question-card input[type="radio"]:checked + span { border-color: var(--ink); background: var(--acid); box-shadow: 4px 4px 0 var(--ink); }
.question-card.is-correct { border-left: 6px solid var(--success); }
.question-card.is-wrong { border-left: 6px solid var(--danger); }

.fill-card { display: block; }
.fill-question { font-size: 1.08rem; font-weight: 750; }
.fill-question > b { display: inline-grid; width: 2rem; height: 2rem; place-items: center; margin-right: 0.4rem; border-radius: 50%; background: var(--ink); color: var(--white); font-size: 0.75rem; }
.fill-card input { display: inline-block; width: min(14rem, 100%); min-height: 2.8rem; margin: 0.3rem 0.4rem; border-width: 0 0 2px; background: var(--paper); text-align: center; font-weight: 900; }

.submit-card, .result-card {
  margin: 5rem 0;
  padding: clamp(1.5rem, 5vw, 3.5rem);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--white);
}
.submit-card p { max-width: 43rem; color: rgba(255,255,255,0.67); }
.submit-card button {
  display: flex;
  width: 100%;
  min-height: 3.7rem;
  align-items: center;
  justify-content: space-between;
  margin-top: 2rem;
  padding: 0.8rem 1.1rem;
  border: 0;
  background: var(--acid);
  color: var(--ink);
  cursor: pointer;
  font-weight: 950;
}
.submit-card button:disabled { cursor: wait; opacity: 0.7; }
.form-message { min-height: 1.6rem; margin: 0.8rem 0 0 !important; color: var(--acid) !important; font-weight: 800; }

.result-card { border: 0; background: var(--electric); box-shadow: 12px 12px 0 var(--ink); }
.result-card .eyebrow { color: var(--acid); }
.result-score { display: flex; align-items: baseline; gap: 0.5rem; margin: 1.8rem 0 0.5rem; }
.result-score strong { font-size: clamp(4.5rem, 12vw, 8rem); line-height: 1; letter-spacing: -0.08em; }
.result-score span { font-size: 1.25rem; font-weight: 900; }
.result-card > p:not(.eyebrow, .result-score) { color: rgba(255,255,255,0.8); }
.result-card ol { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.5rem; margin: 2rem 0; padding: 0; list-style: none; }
.result-card li { padding: 0.65rem 0.4rem; border: 1px solid rgba(255,255,255,0.35); text-align: center; font-size: 0.82rem; font-weight: 900; }
.result-card li.is-correct { background: var(--acid); color: var(--ink); }
.result-card li.is-wrong { background: #ffd7dd; color: #7a1f31; }
.result-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.result-actions a { padding: 0.75rem 1rem; border: 1px solid currentColor; font-weight: 900; }

.quiz-footer { display: flex; min-height: 9rem; align-items: center; justify-content: space-between; gap: 2rem; padding: 2rem max(4vw, calc((100% - 980px) / 2)); background: var(--ink); color: var(--white); }
.quiz-footer p { color: rgba(255,255,255,0.62); }
.quiz-footer a { font-weight: 900; }

@media (max-width: 720px) {
  .quiz-header { min-height: 68px; padding: 0 1rem; }
  .header-link { font-size: 0; }
  .header-link span { font-size: 1.25rem; }
  .progress-wrap { top: 68px; }
  .identity-card { grid-template-columns: 1fr; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .result-card ol { grid-template-columns: repeat(2, 1fr); }
  .quiz-footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}