:root {
  color-scheme: light;
  --oe-ink: #071623;
  --oe-muted: #66788e;
  --oe-subtle: #dbe6f5;
  --oe-line: rgba(8, 32, 61, 0.12);
  --oe-bg: #f5f8fd;
  --oe-paper: #ffffff;
  --oe-accent: #0f6cbf;
  --oe-accent-strong: #0b4f8c;
  --oe-accent-soft: rgba(15, 108, 191, 0.12);
  --oe-gold: #cb9a3d;
  --oe-radius-xl: 34px;
  --oe-radius-lg: 24px;
  --oe-shadow: 0 28px 72px rgba(10, 33, 63, 0.12);
  --oe-font: "Outfit", "Satoshi", "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--oe-bg);
  color: var(--oe-ink);
  font-family: var(--oe-font);
  line-height: 1.7;
  overflow-x: hidden;
}
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
a { color: inherit; }
svg {
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}
[hidden] { display: none !important; }

.shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.shell--narrow {
  width: min(760px, calc(100% - 40px));
}

.openbuds-app {
  background:
    linear-gradient(90deg, rgba(15, 108, 191, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(15, 108, 191, 0.04) 1px, transparent 1px),
    radial-gradient(circle at top right, rgba(67, 163, 255, 0.14), transparent 34rem),
    var(--oe-bg);
  background-size: 56px 56px, 56px 56px, auto, auto;
  min-height: 100dvh;
}

.hero {
  position: relative;
  min-height: 720px;
  padding: 104px 0 76px;
  overflow: hidden;
}

.hero__noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(7, 22, 35, 0.08) 0.6px, transparent 0.6px);
  background-size: 18px 18px;
  opacity: 0.34;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 70%);
}

.hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(420px, 0.96fr);
  align-items: center;
  gap: 56px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 16px;
  color: var(--oe-accent-strong);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  border: 1px solid rgba(15, 108, 191, 0.15);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.88);
}

.eyebrow span {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--oe-accent);
  box-shadow: 0 0 0 6px rgba(15, 108, 191, 0.12);
}

.hero h1 {
  margin: 0;
  color: #061623;
  font-size: clamp(2.8rem, 7vw, 5.9rem);
  font-weight: 950;
  letter-spacing: -.085em;
  line-height: .95;
}

.hero h1 span { display: block; }

.hero__accent {
  margin: 20px 0 0;
  color: var(--oe-accent-strong);
  font-size: clamp(1.24rem, 2.4vw, 1.75rem);
  font-weight: 900;
  letter-spacing: -.04em;
}

.hero__lead {
  max-width: 42rem;
  margin: 22px 0 0;
  color: #263f5b;
  font-size: 1.08rem;
  font-weight: 700;
}

.hero__detail {
  max-width: 43rem;
  margin: 16px 0 0;
  color: var(--oe-muted);
  font-size: .96rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 900;
  letter-spacing: -.02em;
  text-decoration: none;
  transition: transform .28s cubic-bezier(.16,1,.3,1), background .28s cubic-bezier(.16,1,.3,1), border-color .28s cubic-bezier(.16,1,.3,1);
}

.button:active { transform: translateY(1px) scale(.99); }
.button svg { width: 18px; height: 18px; }

.button--primary {
  background: var(--oe-accent);
  color: #fff;
  box-shadow: 0 18px 36px rgba(15, 108, 191, 0.2);
}

.button--primary:hover { background: var(--oe-accent-strong); }

.button--large {
  min-height: 58px;
  padding: 0 26px;
}

.button--ghost {
  background: #fff;
  border-color: var(--oe-line);
  color: #24425e;
}

.button--ghost:hover {
  border-color: rgba(15, 108, 191, 0.3);
  color: var(--oe-accent-strong);
}

.privacy-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--oe-muted);
  font-size: .9rem;
  font-weight: 700;
}

.privacy-note svg { width: 18px; height: 18px; }

.hero-visual {
  position: relative;
  min-height: 540px;
  border-radius: 44px;
  background:
    radial-gradient(circle at 48% 44%, rgba(255,255,255,.97) 0 8rem, transparent 8.1rem),
    radial-gradient(circle at 58% 46%, rgba(67,163,255,.18), transparent 21rem),
    linear-gradient(145deg, rgba(255,255,255,.82), rgba(239,246,255,.82));
  border: 1px solid rgba(15, 108, 191, 0.14);
  box-shadow: var(--oe-shadow), inset 0 1px 0 rgba(255,255,255,.86);
  overflow: hidden;
}

.hero-visual__ring {
  position: absolute;
  border: 1px solid rgba(15, 108, 191, 0.16);
  border-radius: 50%;
}

.hero-visual__ring--one {
  inset: 70px 54px;
  transform: rotate(-12deg);
}

.hero-visual__ring--two {
  inset: 116px 108px;
  border-style: dashed;
  transform: rotate(18deg);
}

.hero-visual__ear {
  position: absolute;
  width: 144px;
  height: 210px;
  border-radius: 48% 52% 42% 58% / 46% 42% 58% 54%;
  background: linear-gradient(180deg, rgba(255,245,232,.88), rgba(248,223,198,.9));
  box-shadow: inset -10px -14px 22px rgba(207,159,118,.16);
}

.hero-visual__ear--left {
  top: 144px;
  left: 92px;
  transform: rotate(-8deg);
}

.hero-visual__ear--right {
  right: 88px;
  bottom: 96px;
  transform: rotate(11deg) scale(.96);
}

.hero-visual__clip {
  position: absolute;
  width: 152px;
  height: 94px;
  border-radius: 999px;
  border: 10px solid #13293e;
  background: linear-gradient(145deg, #fff, #dbeafe 50%, #cddcf8);
  box-shadow: 0 18px 30px rgba(15, 23, 42, .16);
}

.hero-visual__clip i,
.hero-visual__clip b {
  position: absolute;
  top: 19px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(145deg, #17324d, #0f172a);
}

.hero-visual__clip i { left: 16px; }
.hero-visual__clip b { right: 16px; }

.hero-visual__clip--front {
  top: 98px;
  left: 188px;
  transform: rotate(-18deg);
}

.hero-visual__clip--back {
  right: 132px;
  bottom: 112px;
  transform: rotate(14deg) scale(.9);
}

.hero-chip {
  position: absolute;
  z-index: 2;
  display: inline-grid;
  min-height: 32px;
  padding: 6px 12px;
  border: 1px solid rgba(15, 108, 191, 0.16);
  border-radius: 999px;
  color: var(--oe-accent-strong);
  background: rgba(255,255,255,.84);
  box-shadow: 0 10px 22px rgba(15,23,42,.09);
  place-items: center;
  font-size: .66rem;
  font-weight: 900;
  letter-spacing: .04em;
}

.hero-chip--aware { top: 26px; left: 26px; transform: rotate(-7deg); }
.hero-chip--fit { top: 34px; right: 22px; transform: rotate(7deg); }
.hero-chip--work { right: 92px; bottom: 28px; transform: rotate(-5deg); }

.hero-panel {
  position: absolute;
  left: 28px;
  bottom: 26px;
  width: 190px;
  padding: 18px 18px 16px;
  border: 1px solid rgba(15, 108, 191, 0.14);
  border-radius: 24px;
  background: rgba(255,255,255,.82);
  box-shadow: 0 18px 30px rgba(10,33,63,.08);
  backdrop-filter: blur(16px);
}

.hero-panel p {
  margin: 0 0 12px;
  color: var(--oe-accent-strong);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .12em;
}

.hero-panel div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 9px;
  color: #385069;
  font-size: .84rem;
  font-weight: 700;
}

.hero-panel b {
  width: 62px;
  height: 9px;
  border-radius: 999px;
  background: linear-gradient(90deg, #0f6cbf, #66c7ff);
}

.how,
.comparison-guide {
  padding: 32px 0 0;
}

.how__grid {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: 30px;
  align-items: start;
}

.how h2,
.model-comparison__heading h2,
.comparison-guide h2 {
  margin: 0;
  color: #071623;
  font-size: clamp(1.95rem, 3.8vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -.06em;
  line-height: 1.03;
}

.how h2 span,
.comparison-guide h2 span { display: block; }

.steps {
  display: grid;
  gap: 16px;
}

.step,
.insight-block,
.model-comparison,
.comparison-guide__inner,
.disclaimer,
.question-panel,
.quiz-progress,
.model-result {
  border: 1px solid var(--oe-line);
  border-radius: var(--oe-radius-lg);
  background: rgba(255,255,255,.9);
  box-shadow: 0 18px 44px rgba(10,33,63,.07);
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 20px 22px;
}

.step span {
  display: inline-grid;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  color: var(--oe-accent-strong);
  background: var(--oe-accent-soft);
  place-items: center;
  font-weight: 900;
}

.step h3,
.insight-block h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 900;
}

.step p,
.model-comparison__heading p,
.comparison-guide__lead,
.comparison-guide__content p,
.disclaimer p {
  margin: 0;
  color: var(--oe-muted);
}

.how__action {
  display: flex;
  justify-content: center;
  padding-top: 28px;
}

.quiz {
  padding: 40px 0 0;
}

.quiz-progress {
  padding: 18px 18px 16px;
}

.quiz-progress__labels {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  font-weight: 800;
}

.progress-track {
  position: relative;
  height: 12px;
  border-radius: 999px;
  background: #e6edf8;
  overflow: hidden;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #0f6cbf, #78d1ff);
  transition: width .28s ease;
}

.question-panel {
  margin-top: 16px;
  padding: 30px;
}

.question-panel__kicker {
  margin: 0 0 12px;
  color: var(--oe-accent-strong);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .16em;
}

.question-panel h2 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2.35rem);
  line-height: 1.16;
  letter-spacing: -.05em;
}

.answer-list {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.answer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  border: 1px solid rgba(15, 108, 191, 0.14);
  border-radius: 18px;
  background: #fff;
  color: #17324d;
  cursor: pointer;
  font-weight: 800;
  text-align: left;
  transition: transform .24s ease, border-color .24s ease, box-shadow .24s ease;
}

.answer::after {
  width: 28px;
  height: 28px;
  border: 1px solid rgba(15, 108, 191, 0.18);
  border-radius: 50%;
  content: "";
  flex: 0 0 auto;
}

.answer:hover,
.answer:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(15, 108, 191, 0.34);
  box-shadow: 0 14px 24px rgba(10,33,63,.08);
  outline: none;
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--oe-muted);
  cursor: pointer;
  font-weight: 800;
}

.back-button svg { width: 18px; height: 18px; }

.results {
  padding: 42px 0 0;
}

.result-hero {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.score-wrap {
  position: sticky;
  top: 92px;
  padding: 22px;
  border: 1px solid var(--oe-line);
  border-radius: 30px;
  background: rgba(255,255,255,.94);
  box-shadow: 0 18px 44px rgba(10,33,63,.08);
}

.score-ring { width: 100%; height: auto; }
.score-ring__track,
.score-ring__value {
  fill: none;
  stroke-width: 18;
}

.score-ring__track { stroke: #e6edf8; }
.score-ring__value {
  stroke: url(#score-gradient);
  stroke: #0f6cbf;
  stroke-linecap: round;
  stroke-dasharray: 603;
  stroke-dashoffset: 603;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
}

.score-center {
  position: absolute;
  inset: 50% 22px auto;
  transform: translateY(-52%);
  text-align: center;
}

.score-center span,
.score-center em {
  display: block;
  color: var(--oe-muted);
  font-size: .8rem;
  font-weight: 800;
}

.score-center strong {
  display: inline-flex;
  align-items: flex-end;
  gap: 4px;
  margin-top: 6px;
  color: #071623;
  font-size: 3.4rem;
  font-weight: 950;
  letter-spacing: -.08em;
  line-height: .88;
}

.score-center small {
  font-size: 1.18rem;
  transform: translateY(-6px);
}

.result-copy__title {
  margin: 0;
  color: var(--oe-accent-strong);
  font-size: 1.24rem;
  font-weight: 900;
}

.result-copy__description {
  margin: 10px 0 0;
  color: #35506a;
  font-size: 1rem;
}

.model-result {
  margin-top: 20px;
  padding: 24px;
}

.model-badge {
  display: inline-flex;
  margin: 0 0 10px;
  padding: 6px 11px;
  border-radius: 999px;
  background: var(--oe-accent-soft);
  color: var(--oe-accent-strong);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .12em;
}

.model-result h3 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 950;
  letter-spacing: -.05em;
}

.model-visual {
  position: relative;
  height: 112px;
  margin: 18px 0;
}

.model-visual span,
.model-visual i,
.model-visual b {
  position: absolute;
  border-radius: 999px;
}

.model-visual span {
  top: 14px;
  left: 50%;
  width: 160px;
  height: 84px;
  border: 10px solid #13293e;
  background: linear-gradient(145deg, #fff, #dbeafe 52%, #cddcf8);
  box-shadow: 0 18px 30px rgba(15,23,42,.12);
  transform: translateX(-50%) rotate(-8deg);
}

.model-visual i,
.model-visual b {
  top: 38px;
  width: 26px;
  height: 26px;
  background: linear-gradient(145deg, #17324d, #0f172a);
}

.model-visual i { left: calc(50% - 56px); }
.model-visual b { right: calc(50% - 56px); }

.model-result p:last-of-type {
  margin: 0;
  color: #35506a;
}

.model-result ul,
.insight-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.model-result li,
.insight-list li {
  position: relative;
  padding-left: 18px;
  margin-top: 10px;
  color: #35506a;
}

.model-result li::before,
.insight-list li::before {
  position: absolute;
  top: .72em;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--oe-accent);
  content: "";
}

.result-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.result-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 900;
}

.result-links .official {
  background: #0f6cbf;
  color: #fff;
}

.result-links .amazon {
  border: 1px solid rgba(148, 163, 184, .28);
  background: #eef3f9;
  color: #35506a;
}

.result-links .rakuten {
  border: 1px solid rgba(230, 83, 71, .18);
  background: #fff5f3;
  color: #a43d35;
}

.result-links .article {
  border: 1px solid var(--oe-line);
  background: #fff;
  color: #24425e;
}

.low-score-guide {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 18px;
  background: #f8fbff;
  color: var(--oe-muted);
}

.low-score-guide svg {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  color: var(--oe-accent-strong);
}

.insight-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.insight-block {
  padding: 22px;
}

.insight-block__heading {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: center;
}

.insight-block__heading p {
  margin: 0 0 4px;
  color: var(--oe-accent-strong);
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .12em;
}

.insight-icon {
  display: inline-grid;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  place-items: center;
}

.insight-icon svg { width: 22px; height: 22px; }
.insight-icon--positive {
  color: #0f6cbf;
  background: rgba(15, 108, 191, 0.12);
}

.insight-icon--caution {
  color: #a35b00;
  background: rgba(245, 158, 11, 0.12);
}

.model-comparison {
  margin-top: 22px;
  padding: 24px;
}

.model-comparison__heading {
  display: grid;
  gap: 10px;
}

.model-table-wrap {
  margin-top: 20px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  padding: 16px 14px;
  border-bottom: 1px solid rgba(8, 32, 61, 0.08);
  text-align: left;
  vertical-align: top;
}

thead th {
  color: var(--oe-accent-strong);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

tbody tr.is-highlighted {
  background: rgba(15, 108, 191, 0.06);
}

.disclaimer {
  margin-top: 22px;
  padding: 22px;
}

.disclaimer h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  font-weight: 900;
}

.disclaimer p + p { margin-top: 10px; }

.restart-area {
  display: flex;
  justify-content: center;
  padding: 26px 0 4px;
}

.comparison-guide__inner {
  margin-top: 36px;
  padding: 30px;
}

.comparison-guide__lead {
  margin-top: 16px;
}

.comparison-guide__content {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.comparison-guide__content h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-weight: 900;
}

@media (max-width: 980px) {
  .hero__grid,
  .how__grid,
  .result-hero,
  .insight-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 440px;
  }

  .score-wrap {
    position: relative;
    top: 0;
    width: min(320px, 100%);
    margin: 0 auto;
  }
}

@media (max-width: 760px) {
  .shell,
  .shell--narrow {
    width: min(calc(100% - 28px), 1120px);
  }

  .hero {
    min-height: 0;
    padding: 88px 0 56px;
  }

  .hero__detail,
  .comparison-guide__lead,
  .comparison-guide__content p,
  .disclaimer p,
  .step p {
    font-size: .94rem;
  }

  .hero-visual {
    min-height: 360px;
    border-radius: 28px;
  }

  .hero-visual__ear {
    width: 108px;
    height: 158px;
  }

  .hero-visual__ear--left {
    top: 126px;
    left: 44px;
  }

  .hero-visual__ear--right {
    right: 42px;
    bottom: 74px;
  }

  .hero-visual__clip {
    width: 116px;
    height: 72px;
    border-width: 8px;
  }

  .hero-visual__clip i,
  .hero-visual__clip b {
    top: 14px;
    width: 24px;
    height: 24px;
  }

  .hero-visual__clip--front {
    top: 88px;
    left: 128px;
  }

  .hero-visual__clip--back {
    right: 88px;
    bottom: 86px;
  }

  .hero-panel {
    left: 16px;
    bottom: 16px;
    width: 156px;
    padding: 15px 14px 12px;
  }

  .hero-chip {
    padding: 6px 10px;
    font-size: .58rem;
  }

  .question-panel,
  .model-comparison,
  .comparison-guide__inner,
  .disclaimer,
  .model-result,
  .insight-block {
    padding: 20px;
  }

  .answer {
    padding: 15px 16px;
    font-size: .96rem;
  }

  table {
    min-width: 0;
  }

  thead {
    display: none;
  }

  tbody,
  tr,
  th,
  td {
    display: block;
    width: 100%;
  }

  tbody tr {
    padding: 14px 0;
  }

  tbody tr + tr {
    border-top: 1px solid rgba(8, 32, 61, 0.08);
  }

  th,
  td {
    padding: 6px 0;
    border-bottom: 0;
  }

  td::before {
    display: block;
    margin-bottom: 2px;
    color: var(--oe-accent-strong);
    font-size: .72rem;
    font-weight: 900;
    letter-spacing: .08em;
    text-transform: uppercase;
    content: attr(data-label);
  }
}