*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #080808;
  --surface: #140010;
  --surface2: #1e0016;
  --border: #3a0028;
  --accent: #ff0033;
  --accent2: #ff6600;
  --gold: #ffd700;
  --text: #fff0f3;
  --muted: #a07080;
  --correct: #22c55e;
  --wrong: #ef4444;
  --radius: 12px;
  --glow: 0 0 24px rgba(255,0,51,0.45);
  --glow-sm: 0 0 12px rgba(255,0,51,0.3);
}

body {
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(160,0,60,0.18) 0%, transparent 70%),
    radial-gradient(ellipse 40% 30% at 80% 100%, rgba(255,0,51,0.08) 0%, transparent 60%);
  color: var(--text);
  font-family: 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Scanline overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.07) 2px,
    rgba(0,0,0,0.07) 4px
  );
  pointer-events: none;
  z-index: 0;
}

/* ── Header ── */
header {
  width: 100%;
  max-width: 700px;
  padding: 16px 16px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
  z-index: 1;
}
.progress-wrap {
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 99px;
  overflow: visible;
  position: relative;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 99px;
  transition: width 0.5s cubic-bezier(.4,0,.2,1);
  box-shadow: 0 0 10px var(--accent), 0 0 20px rgba(255,0,51,0.4);
  position: relative;
}
.progress-bar::after {
  content: '';
  position: absolute;
  right: -1px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 8px var(--accent);
}
.score-badge {
  font-size: 13px;
  font-weight: 700;
  color: var(--gold);
  white-space: nowrap;
  text-shadow: 0 0 8px rgba(255,215,0,0.6);
  letter-spacing: 0.05em;
}

/* ── Screens ── */
.screen {
  display: none;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 700px;
  padding: 28px 16px 56px;
  gap: 20px;
  position: relative;
  z-index: 1;
}
.screen.active { display: flex; }

/* ── Start screen ── */
.logo {
  font-size: clamp(26px, 7vw, 46px);
  font-weight: 900;
  text-align: center;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.logo .hl {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 12px rgba(255,0,51,0.7));
}
.logo .sub {
  display: block;
  font-size: 0.42em;
  letter-spacing: 0.2em;
  color: var(--muted);
  -webkit-text-fill-color: var(--muted);
  filter: none;
  margin-top: 6px;
}
.subtitle {
  color: var(--muted);
  text-align: center;
  font-size: 14px;
  line-height: 1.8;
}

.rules {
  background: linear-gradient(135deg, var(--surface), var(--surface2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  overflow: hidden;
}
.rules::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.7;
}
.rule-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 13px;
  line-height: 1.7;
}
.rule-num {
  min-width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 12px;
  flex-shrink: 0;
  box-shadow: var(--glow-sm);
}

/* ── Buttons ── */
.btn {
  padding: 14px 44px;
  font-size: 17px;
  font-weight: 900;
  border: none;
  border-radius: 99px;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s;
  letter-spacing: 0.08em;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: scale(0.96) translateY(0); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #cc0028 50%, var(--accent2) 100%);
  color: #fff;
  box-shadow: var(--glow), 0 4px 32px rgba(255,0,51,0.35);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
  transform: skewX(-20deg);
  animation: shimmer 3s infinite;
}
@keyframes shimmer {
  0%   { left: -100%; }
  60%  { left: 160%; }
  100% { left: 160%; }
}
.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-x {
  background: #000;
  color: #fff;
  border: 1px solid #333;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 900;
  letter-spacing: 0.06em;
}
.btn-x:hover {
  background: #111;
  border-color: #555;
  transform: translateY(-2px);
}

/* ── Quiz screen ── */
.question-label {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-align: center;
  line-height: 1.9;
}
.question-label strong {
  color: var(--accent);
  font-size: 16px;
  text-shadow: var(--glow-sm);
}
.genre-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 99px;
  letter-spacing: 0.1em;
  vertical-align: middle;
  box-shadow: var(--glow-sm);
}
.q-text {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.08em;
}

.thumb-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
}
@media (max-width: 480px) {
  .thumb-grid {
    grid-template-columns: 1fr;
  }
}

.thumb-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  position: relative;
}
.thumb-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px) scale(1.01);
  box-shadow: var(--glow-sm);
}
.thumb-card:active { transform: scale(0.97); }

.thumb-card img {
  width: 100%;
  aspect-ratio: 560/420;
  object-fit: cover;
  display: block;
}
.thumb-label {
  padding: 8px 10px;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.4;
  background: linear-gradient(to bottom, var(--surface), var(--surface2));
}

/* 正解・不正解オーバーレイ */
.thumb-card .overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 32px;
  font-weight: 900;
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
}
.thumb-card.correct { border-color: var(--correct); box-shadow: 0 0 20px rgba(34,197,94,0.35); }
.thumb-card.correct .overlay {
  background: rgba(0,30,10,0.65);
  color: #fff;
  opacity: 1;
}
.thumb-card.wrong { border-color: var(--wrong); }
.thumb-card.wrong .overlay {
  background: rgba(30,0,0,0.6);
  color: #fff;
  opacity: 1;
}
.overlay .views {
  font-size: 13px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
}

/* ── Feedback ── */
.feedback-text {
  font-size: 20px;
  font-weight: 900;
  text-align: center;
  min-height: 30px;
  letter-spacing: 0.05em;
}
.feedback-text.correct {
  color: var(--correct);
  text-shadow: 0 0 12px rgba(34,197,94,0.6);
}
.feedback-text.wrong {
  color: var(--wrong);
  text-shadow: 0 0 12px rgba(239,68,68,0.5);
}

.combo-badge {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 99px;
  opacity: 0;
  transform: scale(0.7) translateY(6px);
  transition: opacity 0.2s, transform 0.25s cubic-bezier(.34,1.56,.64,1);
  box-shadow: var(--glow-sm);
  letter-spacing: 0.1em;
}
.combo-badge.show { opacity: 1; transform: scale(1) translateY(0); }

/* ── Result screen ── */
.rank-display {
  text-align: center;
  position: relative;
}
.rank-display::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,0,51,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.rank-letter {
  font-size: clamp(90px, 22vw, 130px);
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent), var(--accent2), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 20px rgba(255,0,51,0.6));
}
.rank-label {
  font-size: 18px;
  font-weight: 700;
  margin-top: 4px;
  color: var(--text);
  letter-spacing: 0.05em;
}
.final-score {
  font-size: 14px;
  color: var(--gold);
  margin-top: 6px;
  text-shadow: 0 0 8px rgba(255,215,0,0.5);
}

.result-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
  width: 100%;
}
.stat-box {
  background: linear-gradient(135deg, var(--surface), var(--surface2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 8px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.stat-box::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  opacity: 0.6;
}
.stat-num {
  font-size: 30px;
  font-weight: 900;
  background: linear-gradient(135deg, #fff, var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-desc {
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
  letter-spacing: 0.06em;
}

.btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ── Gallery ── */
.gallery-section {
  width: 100%;
  margin-top: 8px;
}
.gallery-title {
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--text);
  margin-bottom: 4px;
  text-align: center;
}
.gallery-sub {
  font-size: 11px;
  color: var(--muted);
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: 0.08em;
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  width: 100%;
}
@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
}
.gallery-item {
  display: block;
  border-radius: 8px;
  overflow: hidden;
  border: 1.5px solid var(--border);
  background: var(--surface);
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  text-decoration: none;
  position: relative;
}
.gallery-item:hover {
  transform: translateY(-3px) scale(1.03);
  border-color: var(--accent);
  box-shadow: var(--glow-sm);
}
.gallery-item img {
  width: 100%;
  aspect-ratio: 560/420;
  object-fit: cover;
  display: block;
}
.gallery-info {
  padding: 4px 5px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.gallery-views {
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 0.05em;
}
.gallery-badge {
  font-size: 9px;
  color: var(--correct);
  font-weight: 700;
}
.gallery-winner {
  border-color: rgba(34,197,94,0.4);
}
.gallery-winner::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 8px;
  box-shadow: inset 0 0 0 1.5px rgba(34,197,94,0.5);
  pointer-events: none;
}

/* ── Affiliate Banner (固定フッター商品スクロール帯) ── */
.affiliate-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: #080808;
  border-top: 1px solid var(--accent);
  box-shadow: 0 -4px 24px rgba(255,0,51,0.3);
  transition: transform 0.3s ease;
}
.affiliate-banner.hidden {
  transform: translateY(100%);
}

/* ヘッダー行 */
.affiliate-banner__header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 36px 2px 10px;
  position: relative;
}
.affiliate-banner__label {
  font-size: 9px;
  font-weight: 700;
  color: var(--muted);
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
  padding: 1px 4px;
  letter-spacing: 0.1em;
}
.affiliate-banner__logo {
  font-size: 14px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 6px rgba(255,0,51,0.6));
  line-height: 1;
}
.affiliate-banner__logo-sub {
  font-size: 10px;
  -webkit-text-fill-color: var(--muted);
  filter: none;
  margin-left: 1px;
}
.affiliate-banner__tagline {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.05em;
}
.affiliate-banner__close {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  padding: 3px 5px;
  border-radius: 4px;
  line-height: 1;
}
.affiliate-banner__close:hover { color: var(--text); }

/* スクロールトラック */
.affiliate-banner__track-wrap {
  overflow: hidden;
  width: 100%;
  mask-image: linear-gradient(90deg, transparent 0%, black 4%, black 96%, transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, black 4%, black 96%, transparent 100%);
}
.affiliate-banner__track {
  display: flex;
  gap: 6px;
  padding: 4px 0 6px;
  animation: bannerScroll 40s linear infinite;
  width: max-content;
}
.affiliate-banner__track:hover {
  animation-play-state: paused;
}
@keyframes bannerScroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.banner-item {
  flex-shrink: 0;
  display: block;
  width: 80px;
  height: 60px;
  border-radius: 5px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: border-color 0.15s, transform 0.15s;
}
.banner-item:hover {
  border-color: var(--accent);
  transform: translateY(-2px) scale(1.05);
  box-shadow: var(--glow-sm);
  z-index: 1;
}
.banner-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
/* バナー分の余白 */
body { padding-bottom: 90px; }

/* ── Age gate ── */
.age-gate {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
  padding: 16px;
}
.age-icon {
  font-size: 64px;
  line-height: 1;
}
.age-title {
  font-size: 28px;
  font-weight: 900;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.age-body {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}