.btn {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 15px 26px;
  border: 1px solid transparent;
  border-radius: 0;
  color: var(--ink);
  font-size: 15px;
  font-weight: var(--weight-bold);
  line-height: 1;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}
.btn-primary { background: var(--ink); color: var(--white); transition: background .25s; }
.btn-primary:hover { background: var(--red); }
.btn-primary .arrow { transition: transform .3s var(--ease-soft); }
.btn-primary:hover .arrow { transform: translateX(4px); }
.btn-ghost { border-color: var(--ink); background: transparent; }
.btn-ghost::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: var(--ink);
  transition: width .3s var(--ease-soft);
  z-index: 0;
}
.btn-ghost span { position: relative; z-index: 1; transition: color .3s; }
.btn-ghost:hover span { color: var(--white); }
.btn-ghost:hover::after { width: 100%; }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding-bottom: 4px;
  border-bottom: 1px solid currentColor;
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  text-decoration: none;
}
.text-link span { transition: transform .3s var(--ease-soft); }
.text-link:hover span { transform: translateX(4px); }
.chip {
  min-height: 40px;
  padding: 9px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
  font-size: 13px;
  font-weight: var(--weight-bold);
  transition: background .2s, border-color .2s, color .2s;
}
.chip:hover { border-color: var(--ink); }
.chip.is-active, .chip[aria-pressed="true"] { border-color: var(--ink); background: var(--ink); color: var(--white); }
.kicker, .eyebrow, .section-label {
  color: var(--red);
  font-size: var(--text-xs);
  font-weight: 850;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.section-head { max-width: 760px; margin-bottom: 52px; }
.section-head h2 {
  margin-top: 18px;
  font-size: var(--heading-section);
  font-weight: var(--weight-black);
  letter-spacing: -.035em;
  line-height: 1.12;
  overflow-wrap: normal;
  word-break: keep-all;
  text-wrap: pretty;
}
.section-head > p:last-child, .section-head__copy { max-width: 680px; margin-top: 18px; color: var(--muted); font-size: var(--text-body); line-height: var(--leading-body); }
.section-head__copy { display: grid; gap: var(--space-3, 16px); }
.section-head__copy p { margin: 0; }
.placeholder {
  display: grid;
  place-content: end start;
  min-height: 220px;
  padding: 16px;
  background: linear-gradient(135deg, var(--ph1), var(--ph2));
  color: rgba(13, 13, 13, .42);
  font-size: 12px;
  font-weight: 750;
}
.sample-banner {
  position: fixed;
  right: 10px;
  bottom: 10px;
  z-index: 500;
  display: flex;
  gap: 8px;
  padding: 8px 10px;
  background: var(--ink);
  color: var(--white);
  font-size: 10px;
  letter-spacing: .08em;
}
.reveal { opacity: 0; transform: translateY(38px); transition: opacity .9s var(--ease-out), transform .9s var(--ease-out); }
.reveal.in, .reveal.is-visible { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 32px; }
.empty-state { padding: 48px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--muted); }
.load-more { display: flex; justify-content: center; margin-top: 44px; }
.small-note { margin-top: 12px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.quiz-box { max-width: 760px; border: 1px solid var(--ink); }
.quiz-box__progress { height: 3px; overflow: hidden; background: var(--line); }
.quiz-box__progress span { display: block; width: var(--quiz-progress); height: 100%; background: var(--red); transition: width .3s var(--ease-out); }
.quiz-box__question, .quiz-box__result { padding: 34px 32px 24px; }
.quiz-box__question strong, .quiz-box__result strong { display: block; margin-top: 14px; font-size: clamp(20px, 3vw, 30px); line-height: 1.4; overflow-wrap: normal; word-break: keep-all; text-wrap: pretty; }
.quiz-box__options { display: grid; gap: 0; border-top: 1px solid var(--line); }
.quiz-box__option {
  width: 100%;
  padding: 18px 24px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: background .2s, color .2s;
}
.quiz-box__option:hover { background: var(--ink); color: var(--white); }
.quiz-box__result p { margin: 16px 0 24px; color: var(--muted); line-height: 1.7; }
.quiz-box__result .btn-ghost { margin-left: 8px; }
.level-diagnosis-section { border-top: 1px solid var(--line); }
.level-diagnosis-section .section-head { max-width: 720px; }
.level-diagnosis-section .sec-label { display: flex; gap: 12px; align-items: baseline; color: var(--red); font-size: var(--text-xs); font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
.level-diagnosis-section .sec-label .n { color: var(--muted); }
.level-diagnosis-section .section-head h2 { text-wrap: balance; }
.level-diagnosis-section .section-head > p { max-width: 680px; text-wrap: pretty; }
.level-diagnosis-section .quiz-box { margin-top: clamp(32px, 5vw, 56px); }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }
@media (max-width: 560px) {
  .btn { width: 100%; }
  .quiz-box__question, .quiz-box__result { padding: 28px 20px 20px; }
  .quiz-box__result .btn-ghost { margin: 8px 0 0; }
}