:root {
  --yk-ink: #08060d;
  --yk-ink2: #100b18;
  --yk-paper: #e8e0d0;
  --yk-paper-dim: #b6ad99;
  --yk-blood: #8f1d22;
  --yk-blood2: #c43a3a;
  --yk-gold: #b98f3e;
  --yk-line: rgba(232, 224, 208, 0.18);
}

body.yk-body {
  margin: 0;
  background: radial-gradient(ellipse at 50% -20%, #1a1226 0%, var(--yk-ink) 60%), var(--yk-ink);
  color: var(--yk-paper);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  line-height: 1.9;
  overflow-x: hidden;
}

/* 粒子ノイズ＋ビネット */
body.yk-body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 4;
  background:
    radial-gradient(ellipse at 50% 42%, transparent 42%, rgba(0, 0, 0, 0.72) 100%),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.014) 0 1px, transparent 1px 3px);
}

/* 金と血赤の霞（絵巻素材・透過WebP） */
body.yk-body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    url("../images/mist-gold.webp") no-repeat top -60px center / 130% auto,
    url("../images/mist-red.webp") no-repeat bottom -50px center / 140% auto;
  opacity: 0.22;
  animation: yk-mist 46s ease-in-out infinite alternate;
}

@keyframes yk-mist {
  from { transform: translateX(-1.5%); }
  to { transform: translateX(1.5%); }
}

/* 浮遊する文字 */
.yk-float {
  position: fixed;
  z-index: 0;
  color: rgba(196, 58, 58, 0.06);
  font-size: 130px;
  user-select: none;
  pointer-events: none;
  animation: yk-drift 24s ease-in-out infinite alternate;
}

@keyframes yk-drift {
  from { transform: translateY(-14px) rotate(-4deg); }
  to { transform: translateY(16px) rotate(3deg); }
}

.yk-page {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 18px 72px;
  position: relative;
  z-index: 1;
}

.yk-kicker {
  font-size: 12px;
  letter-spacing: 0.5em;
  color: var(--yk-gold);
  margin: 0 0 10px;
}

/* ---------- hero ---------- */

.yk-hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 30px;
  align-items: center;
  padding: 40px 0 18px;
}

.yk-hero h1 {
  font-size: clamp(32px, 6vw, 52px);
  letter-spacing: 0.14em;
  line-height: 1.4;
  margin: 0 0 6px;
  text-shadow: 0 0 22px rgba(143, 29, 34, 0.55);
  animation: yk-flicker 7s infinite;
}

@keyframes yk-flicker {
  0%, 92%, 96%, 100% { opacity: 1; }
  93% { opacity: 0.5; }
  94% { opacity: 0.9; }
  95% { opacity: 0.35; }
}

.yk-hero h1 .yk-accent {
  color: var(--yk-blood2);
}

.yk-tagline {
  margin: 0 0 18px;
  font-size: 14.5px;
  letter-spacing: 0.3em;
  color: #cfc6b2;
}

.yk-lead {
  margin: 0 0 22px;
  font-size: 14.5px;
  letter-spacing: 0.08em;
  color: var(--yk-paper-dim);
}

.yk-hero-visual img {
  width: 100%;
  height: auto;
  border-radius: 4px;
  border: 1px solid rgba(185, 143, 62, 0.35);
  box-shadow: 0 0 40px rgba(143, 29, 34, 0.25);
  display: block;
}

.yk-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.yk-meta-note {
  margin: 16px 0 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: #7d7566;
}

.yk-warn {
  margin: 10px 0 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 2.1;
  color: #57503f;
}

.yk-warn .yk-kie {
  opacity: 0.55;
}

/* ---------- buttons ---------- */

.yk-button {
  display: inline-block;
  box-sizing: border-box;
  padding: 15px 40px;
  font-size: 15px;
  letter-spacing: 0.4em;
  text-indent: 0.4em;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  font-family: inherit;
  border-radius: 2px;
  border: 1px solid rgba(232, 224, 208, 0.45);
  color: var(--yk-paper);
  background: transparent;
  transition: background-color 0.4s, box-shadow 0.4s, border-color 0.4s, letter-spacing 0.4s;
}

.yk-button:hover {
  border-color: var(--yk-blood2);
  box-shadow: 0 0 22px rgba(143, 29, 34, 0.4);
}

.yk-button.primary {
  background: linear-gradient(180deg, rgba(143, 29, 34, 0.45), rgba(143, 29, 34, 0.12));
  border-color: rgba(196, 58, 58, 0.6);
  font-weight: 600;
}

.yk-button.primary:hover {
  background: var(--yk-blood);
  box-shadow: 0 0 34px rgba(143, 29, 34, 0.6);
  letter-spacing: 0.5em;
}

/* ---------- sections / cards ---------- */

.yk-section {
  margin-top: 54px;
}

.yk-section-heading h2 {
  font-size: clamp(20px, 3.6vw, 26px);
  letter-spacing: 0.2em;
  margin: 0 0 8px;
  text-shadow: 0 0 16px rgba(143, 29, 34, 0.35);
}

.yk-section-heading p {
  margin: 0 0 20px;
  font-size: 13.5px;
  color: var(--yk-paper-dim);
}

.yk-card {
  background: rgba(232, 224, 208, 0.035);
  color: var(--yk-paper);
  border: 1px solid var(--yk-line);
  border-radius: 4px;
  padding: 24px 24px;
}

.yk-card h2,
.yk-card h3 {
  color: var(--yk-paper);
  letter-spacing: 0.12em;
}

.yk-card p {
  color: #d5ccba;
}

/* ---------- type grid (index) ---------- */

.yk-type-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.yk-type-card {
  background: rgba(232, 224, 208, 0.03);
  border: 1px solid rgba(185, 143, 62, 0.3);
  border-radius: 4px;
  padding: 18px 12px;
  text-align: center;
  transition: border-color 0.4s, box-shadow 0.4s;
}

.yk-type-card:hover {
  border-color: var(--yk-blood2);
  box-shadow: 0 0 18px rgba(143, 29, 34, 0.35);
}

.yk-type-card .yk-mon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px solid rgba(185, 143, 62, 0.55);
  color: #d3a94f;
  font-size: 26px;
  margin-bottom: 10px;
  text-shadow: 0 0 12px rgba(211, 169, 79, 0.5);
}

.yk-type-card strong {
  display: block;
  font-size: 14.5px;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.yk-type-card span {
  font-size: 11.5px;
  color: #8d8471;
  line-height: 1.7;
  display: block;
}

/* ---------- steps ---------- */

.yk-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.yk-step {
  background: rgba(232, 224, 208, 0.03);
  border: 1px solid var(--yk-line);
  border-radius: 4px;
  padding: 20px 18px;
  font-size: 13.5px;
  color: var(--yk-paper-dim);
}

.yk-step .yk-step-no {
  display: block;
  color: var(--yk-blood2);
  font-size: 13px;
  letter-spacing: 0.4em;
  margin-bottom: 8px;
}

.yk-step strong {
  display: block;
  color: var(--yk-paper);
  margin-bottom: 6px;
  letter-spacing: 0.1em;
}

/* ---------- about / faq ---------- */

.yk-about-grid {
  display: grid;
  gap: 18px;
}

.yk-about-grid h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
  border-left: 3px solid var(--yk-blood);
  padding-left: 10px;
}

.yk-about-grid p {
  margin: 0;
  font-size: 13.5px;
  color: var(--yk-paper-dim);
}

.yk-faq details {
  background: rgba(232, 224, 208, 0.035);
  border: 1px solid var(--yk-line);
  color: var(--yk-paper);
  border-radius: 4px;
  padding: 14px 18px;
  margin-bottom: 10px;
}

.yk-faq summary {
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.yk-faq p {
  margin: 10px 0 2px;
  font-size: 13.5px;
  color: var(--yk-paper-dim);
}

/* ---------- quiz ---------- */

.yk-quiz-shell {
  max-width: 640px;
  margin: 0 auto;
  padding: 36px 18px 70px;
  position: relative;
  z-index: 1;
}

.yk-progress-head {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  letter-spacing: 0.34em;
  color: #7d7566;
  margin-bottom: 8px;
}

.yk-progress-track {
  height: 2px;
  background: rgba(232, 224, 208, 0.14);
  overflow: hidden;
}

.yk-progress-track span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--yk-blood), var(--yk-blood2));
  transition: width 0.6s ease;
}

.yk-quiz-card {
  margin-top: 50px;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.yk-quiz-card.is-fading {
  opacity: 0;
}

.yk-scene {
  margin: 0 0 26px;
}

.yk-scene img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  border: 1px solid rgba(232, 224, 208, 0.16);
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.55);
}

.yk-q-number {
  font-size: 13px;
  letter-spacing: 0.5em;
  color: var(--yk-blood2);
  margin: 0 0 18px;
}

.yk-q-text {
  font-size: 19px;
  line-height: 2;
  letter-spacing: 0.06em;
  margin: 0 0 30px;
  min-height: 4.4em;
  font-weight: 600;
}

.yk-options {
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.yk-option {
  display: block;
  width: 100%;
  box-sizing: border-box;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  font-size: 15px;
  line-height: 1.8;
  letter-spacing: 0.05em;
  color: var(--yk-paper);
  background: rgba(232, 224, 208, 0.03);
  border: 1px solid rgba(232, 224, 208, 0.24);
  border-radius: 2px;
  padding: 15px 20px;
  transition: background-color 0.3s, border-color 0.3s, padding-left 0.3s, box-shadow 0.3s;
}

.yk-option:hover {
  background: rgba(143, 29, 34, 0.28);
  border-color: var(--yk-blood2);
  padding-left: 28px;
  box-shadow: 0 0 18px rgba(143, 29, 34, 0.35);
}

.yk-quiz-footer {
  margin-top: 34px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.yk-quiz-footer .yk-button {
  padding: 10px 22px;
  font-size: 12.5px;
  letter-spacing: 0.2em;
}

.yk-whisper {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.34em;
  color: #57503f;
  min-height: 1.6em;
  text-align: right;
  transition: color 1.2s;
}

.yk-whisper.is-awake {
  color: rgba(196, 58, 58, 0.75);
}

.yk-analyzing {
  text-align: center;
  padding: 90px 0;
}

.yk-analyzing .yk-spinner {
  width: 10px;
  height: 10px;
  margin: 0 auto 30px;
  border-radius: 50%;
  background: var(--yk-blood2);
  box-shadow: 0 0 20px rgba(196, 58, 58, 0.8);
  animation: yk-pulse 1.4s ease-in-out infinite;
}

@keyframes yk-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(2.4); opacity: 0.35; }
}

.yk-analyzing p {
  animation: yk-flicker 3.5s infinite;
}

/* ---------- result ---------- */

.yk-result-hero {
  text-align: center;
  padding: 40px 0 8px;
  opacity: 0;
  animation: yk-appear 1.6s ease 0.2s forwards;
}

@keyframes yk-appear {
  to { opacity: 1; }
}

[data-result-body] .yk-section {
  opacity: 0;
  animation: yk-appear 1.2s ease 0.9s forwards;
}

.yk-card-figure {
  margin: 30px auto 0;
  max-width: 320px;
}

.yk-card-figure img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  border: 1px solid rgba(185, 143, 62, 0.5);
  box-shadow: 0 0 44px rgba(143, 29, 34, 0.4), 0 14px 40px rgba(0, 0, 0, 0.6);
}

.yk-result-mon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 112px;
  height: 112px;
  border-radius: 50%;
  border: 1px solid rgba(196, 58, 58, 0.6);
  box-shadow: 0 0 40px rgba(143, 29, 34, 0.4) inset, 0 0 30px rgba(143, 29, 34, 0.3);
  color: var(--yk-blood2);
  font-size: 52px;
  margin-bottom: 22px;
  text-shadow: 0 0 18px rgba(196, 58, 58, 0.6);
}

.yk-result-prefix {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.5em;
  color: #7d7566;
}

.yk-result-name {
  margin: 10px 0 4px;
  font-size: clamp(34px, 7.5vw, 52px);
  letter-spacing: 0.14em;
  text-shadow: 0 0 26px rgba(143, 29, 34, 0.6);
}

.yk-result-yomi {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.6em;
  color: #7d7566;
}

.yk-result-catch {
  margin: 0 auto;
  max-width: 560px;
  font-size: 16px;
  letter-spacing: 0.1em;
  color: #d5ccba;
}

.yk-result-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.yk-result-card h2 {
  margin: 0 0 12px;
  font-size: 16px;
  border-left: 3px solid var(--yk-blood);
  padding-left: 10px;
  letter-spacing: 0.12em;
}

.yk-result-card p {
  margin: 0;
  font-size: 14px;
}

.yk-list {
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
  color: #d5ccba;
}

.yk-list li {
  margin-bottom: 9px;
}

.yk-hitokoto {
  text-align: center;
  font-size: 15.5px;
  letter-spacing: 0.2em;
  color: var(--yk-blood2);
  font-weight: 600;
  text-shadow: 0 0 14px rgba(196, 58, 58, 0.4);
}

.yk-share-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 12px;
}

.yk-share-row .yk-share-button {
  cursor: pointer;
  font-family: inherit;
  font-size: 13.5px;
  letter-spacing: 0.1em;
  border-radius: 2px;
  border: 1px solid rgba(232, 224, 208, 0.35);
  background: transparent;
  color: var(--yk-paper);
  padding: 11px 22px;
  transition: background-color 0.3s, border-color 0.3s;
}

.yk-share-row .yk-share-button:hover {
  background: rgba(143, 29, 34, 0.35);
  border-color: var(--yk-blood2);
}

.yk-type-cells {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.yk-type-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: #8d8471;
  border: 1px solid rgba(232, 224, 208, 0.14);
  border-radius: 2px;
  padding: 13px 6px;
  transition: border-color 0.3s, color 0.3s, box-shadow 0.3s;
}

.yk-type-cell:hover {
  color: var(--yk-paper);
  border-color: var(--yk-blood2);
  box-shadow: 0 0 14px rgba(143, 29, 34, 0.3);
}

.yk-type-cell.is-current {
  color: var(--yk-blood2);
  border-color: var(--yk-blood2);
}

.yk-type-cell-mon {
  font-size: 20px;
}

.yk-notice {
  font-size: 11.5px;
  color: #6a6253;
  letter-spacing: 0.1em;
  margin: 14px 0 0;
  text-align: center;
}

.yk-card .yk-notice {
  color: #8d8471;
}

.yk-alert {
  color: #e0968f;
  font-size: 14px;
  text-align: center;
}

/* ---------- responsive ---------- */

@media (max-width: 760px) {
  .yk-hero {
    grid-template-columns: 1fr;
    gap: 22px;
    padding-top: 24px;
  }

  .yk-hero-visual {
    order: -1;
  }

  .yk-hero-actions .yk-button.primary {
    width: 100%;
  }

  .yk-float {
    font-size: 84px;
  }

  .yk-type-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .yk-steps {
    grid-template-columns: 1fr;
  }

  .yk-result-layout {
    grid-template-columns: 1fr;
  }

  .yk-type-cells {
    grid-template-columns: repeat(2, 1fr);
  }

  .yk-q-text {
    font-size: 17px;
    min-height: 0;
  }
}