:root {
  color-scheme: light;
  --ink: #17191c;
  --muted: #555b60;
  --line: #c8c9c9;
  --accent: #f47b20;
  --paper: #fff;
  --soft-paper: #f5f6f4;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

.detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 12px 5%;
}

.back-link,
.header-buy {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 0.9rem;
  font-weight: 600;
}

.back-link span {
  font-size: 1.3rem;
}

.header-buy {
  padding: 9px 17px;
  border: 1px solid var(--ink);
  border-radius: 999px;
}

.proof-hero {
  max-width: 1280px;
  margin: 0 auto;
  padding: 18px 5% 68px;
}

.proof-hero h1 {
  margin: 0 auto 42px;
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-weight: 400;
  line-height: 1.05;
  text-align: center;
}

.proof-hero h1 strong {
  font-weight: 700;
}

.proof-layout {
  display: grid;
  grid-template-columns: minmax(150px, 0.72fr) minmax(240px, 1.65fr) minmax(150px, 0.72fr);
  align-items: center;
  gap: clamp(22px, 5vw, 72px);
  max-width: 1080px;
  min-height: 390px;
  margin: 0 auto;
}

.proof-stat {
  align-self: center;
  max-width: 220px;
}

.proof-stat-summary {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: clamp(2.35rem, 4.2vw, 3.3rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.stat-copy {
  max-width: 215px;
  margin-top: 8px;
  font-size: 0.88rem;
  line-height: 1.35;
}

.molecule-visual {
  position: relative;
  display: grid;
  place-items: center;
  height: 390px;
  margin: 0;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 62%, #eef1ed 0, #fff 66%);
}

.molecule-visual img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 18px;
  animation: molecule-enter 700ms ease-out both;
}

.molecule-visual figcaption {
  position: absolute;
  right: 12px;
  bottom: 10px;
  color: var(--muted);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rating-block {
  display: grid;
  gap: 2px;
  margin-top: 25px;
  font-size: 0.78rem;
}

.rating-block strong {
  font-size: 1.4rem;
  font-weight: 500;
}

.stars {
  color: var(--accent);
  letter-spacing: 0.05em;
}

.world-section {
  padding: 62px 5% 72px;
  background: var(--soft-paper);
}

.world-copy {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.section-kicker {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.world-copy h2 {
  margin: 0 auto 22px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 400;
  line-height: 1.12;
}

.world-copy > p:not(.section-kicker) {
  margin: 0 auto 18px;
  color: #34383b;
  font-size: 0.98rem;
  line-height: 1.55;
}

.world-copy h3 {
  margin: 28px 0 9px;
  font-size: 1rem;
}

.main-buy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 52px;
  margin: 18px 0 58px;
  padding: 13px 24px;
  border-radius: 999px;
  background: #18242b;
  color: #fff;
  font-size: 0.94rem;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(24, 36, 43, 0.16);
  transition: transform 0.2s ease, background 0.2s ease;
}

.main-buy:hover {
  transform: translateY(-2px);
  background: #29404a;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 1080px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.data-item {
  min-width: 0;
  padding: 26px 18px 18px;
  border-left: 1px solid var(--ink);
}

.data-item:last-child {
  border-right: 1px solid var(--ink);
}

.data-item-content {
  display: grid;
  min-height: 150px;
  align-content: start;
}

.data-number {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.data-title {
  margin-top: 5px;
  font-size: 0.92rem;
  font-weight: 700;
}

.data-copy {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.79rem;
  line-height: 1.4;
}

.data-note {
  max-width: 1080px;
  margin: 20px auto 0;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.5;
}

.detail-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 5%;
  color: var(--muted);
  font-size: 0.78rem;
}

.detail-footer a:last-child {
  color: var(--ink);
  font-weight: 600;
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid #277a86;
  outline-offset: 4px;
}

@keyframes molecule-enter {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes reveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 760px) {
  .proof-hero {
    padding-top: 22px;
    padding-bottom: 42px;
  }

  .proof-hero h1 {
    margin-bottom: 25px;
    font-size: clamp(2.3rem, 10vw, 3.5rem);
  }

  .proof-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
    min-height: 0;
  }

  .molecule-visual {
    grid-column: 1 / -1;
    grid-row: 1;
    height: min(78vw, 350px);
  }

  .proof-stat {
    max-width: none;
    align-self: start;
  }

  .stat-number {
    font-size: 2.5rem;
  }

  .stat-copy {
    font-size: 0.8rem;
  }

  .rating-block {
    margin-top: 14px;
  }

  .world-section {
    padding: 48px 6% 50px;
  }

  .main-buy {
    margin-bottom: 38px;
  }

  .data-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .data-item:nth-child(3) {
    border-top: 1px solid var(--line);
  }

  .data-item:nth-child(4) {
    border-top: 1px solid var(--line);
    border-right: 1px solid var(--ink);
  }
}

@media (max-width: 420px) {
  .detail-header {
    min-height: 60px;
    padding-right: 5%;
    padding-left: 5%;
  }

  .back-link,
  .header-buy {
    font-size: 0.78rem;
  }

  .data-item {
    padding: 20px 12px 16px;
  }

  .data-item-content {
    min-height: 172px;
  }

  .data-copy {
    font-size: 0.74rem;
  }

  .detail-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}