/* Katori Titanium Cutting Board Guide — production styles
   Converted from an approved Claude Design export. Visual values preserved as authored. */

:root {
  --ink: #151515;
  --ink-2: #1B1B1B;
  --paper: #F7F5F1;
  --white: #FFFFFF;
  --border: #E5E2DD;
  --border-soft: #EFEDE9;
  --muted: #6B6A66;
  --muted-2: #8B8A86;
  --body-text: #21201E;
  --nav-text: #4A4A47;
  --green: #1F5A46;
  --green-dark: #17402F;
  --green-light: #26674F;
  --green-hover: #2C7359;
  --silver: #B9BEC3;
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Work Sans', -apple-system, BlinkMacSystemFont, Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--body-text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { color: var(--green); text-decoration: none; }
a:hover { color: var(--green-dark); }

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 18px;
  border-radius: 0 0 8px 0;
  font-size: 14px;
  font-weight: 600;
}
.skip-link:focus {
  left: 0;
}

details > summary { list-style: none; cursor: pointer; }
details > summary::-webkit-details-marker { display: none; }
details[open] .faq__plus { transform: rotate(45deg); }

@keyframes katoriFade {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Layout helpers */
.container { max-width: 1240px; margin: 0 auto; padding-left: clamp(18px, 4vw, 40px); padding-right: clamp(18px, 4vw, 40px); }
.container--narrow { max-width: 1120px; }
.container--article { max-width: 860px; }

.section { padding-top: clamp(56px, 7vw, 104px); padding-bottom: clamp(56px, 7vw, 104px); }
.section--paper { background: var(--paper); }
.section--white { background: var(--white); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section--dark { background: var(--ink-2); color: var(--paper); }

.section-heading {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(30px, 3.6vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 12px;
  max-width: 24ch;
}
.section-subtext {
  font-size: 16px;
  color: var(--muted);
  margin: 0 0 clamp(32px, 4vw, 52px);
  max-width: 60ch;
  line-height: 1.6;
}
.section--dark .section-subtext { color: rgba(247, 245, 241, 0.62); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Buttons / CTAs */
.btn-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: fit-content;
  background: linear-gradient(180deg, var(--green-light) 0%, var(--green) 100%);
  color: var(--white);
  padding: 20px 32px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  box-shadow: 0 14px 32px rgba(31, 90, 70, 0.26), inset 0 1px 0 rgba(255, 255, 255, 0.14);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}
.btn-cta:hover {
  background: linear-gradient(180deg, var(--green-hover) 0%, var(--green) 100%);
  transform: translateY(-3px);
  box-shadow: 0 20px 40px rgba(31, 90, 70, 0.34);
  color: var(--white);
}
.btn-cta__arrow { font-size: 17px; line-height: 1; }

.btn-cta--nav {
  padding: 12px 20px;
  border-radius: 12px;
  font-size: 13px;
  box-shadow: 0 6px 18px rgba(31, 90, 70, 0.22);
  white-space: nowrap;
}
.btn-cta--nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(31, 90, 70, 0.3);
}

.btn-cta--hero {
  min-width: min(100%, 340px);
  padding: 21px 34px;
  font-size: clamp(14px, 1.1vw, 16px);
  letter-spacing: 0.1em;
  box-shadow: 0 18px 42px rgba(31, 90, 70, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.16);
}
.btn-cta--hero:hover {
  box-shadow: 0 24px 50px rgba(31, 90, 70, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-cta--wide { min-width: min(100%, 320px); }

.btn-cta--final {
  min-width: min(100%, 340px);
  padding: 22px 36px;
  font-size: clamp(14px, 1.1vw, 16px);
  box-shadow: 0 18px 44px rgba(31, 90, 70, 0.44), inset 0 1px 0 rgba(255, 255, 255, 0.16);
}
.btn-cta--final:hover {
  box-shadow: 0 24px 54px rgba(31, 90, 70, 0.5);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(247, 245, 241, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.brand__name { font-family: var(--font-display); font-size: 20px; line-height: 1; color: var(--ink); }
.brand__tag { font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted-2); }

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 30px);
  font-size: 14px;
  color: var(--nav-text);
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav__link { color: var(--nav-text); }
.nav__link:hover { color: var(--ink); }

/* Hero */
.hero { background: var(--ink); color: var(--paper); position: relative; overflow: hidden; }
.hero__inner {
  padding-top: clamp(40px, 6vw, 84px);
  padding-bottom: clamp(48px, 6vw, 90px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(32px, 4vw, 64px);
}
.hero__content {
  flex: 1 1 380px;
  min-width: min(100%, 320px);
  animation: katoriFade 600ms ease both;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(185, 190, 195, 0.38);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver);
  margin-bottom: clamp(20px, 3vw, 30px);
}
.hero__badge-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--silver); display: inline-block; }
.hero__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(38px, 5.6vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.022em;
  margin: 0 0 22px;
}
.hero__title-em { font-style: italic; color: var(--white); border-bottom: 1px solid rgba(185, 190, 195, 0.5); padding-bottom: 2px; }
.hero__title-muted { color: var(--silver); }
.hero__lede {
  font-size: clamp(16px, 1.3vw, 18px);
  line-height: 1.6;
  color: rgba(247, 245, 241, 0.74);
  max-width: 46ch;
  margin: 0 0 clamp(24px, 3vw, 32px);
}
.hero__tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: clamp(26px, 3.4vw, 38px); }
.hero__tag {
  border: 1px solid rgba(185, 190, 195, 0.34);
  background: rgba(255, 255, 255, 0.045);
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 13px;
  letter-spacing: 0.01em;
  color: #E7E5E1;
}
.hero__note { font-size: 13.5px; line-height: 1.55; color: rgba(247, 245, 241, 0.6); margin: 16px 0 0; max-width: 46ch; }
.hero__disclosure {
  font-size: 11.5px;
  line-height: 1.6;
  color: rgba(185, 190, 195, 0.55);
  margin: 18px 0 0;
  max-width: 52ch;
  border-top: 1px solid rgba(185, 190, 195, 0.16);
  padding-top: 14px;
}
.hero__media { flex: 1.25 1 520px; min-width: min(100%, 320px); position: relative; }
.hero__media-glow {
  position: absolute;
  inset: -8% -6% -12% -6%;
  background: radial-gradient(ellipse at 60% 55%, rgba(185, 190, 195, 0.32) 0%, rgba(21, 21, 21, 0) 58%);
  pointer-events: none;
}
.hero__image {
  position: relative;
  width: 100%;
  height: auto;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.07);
  box-shadow: 0 46px 100px rgba(0, 0, 0, 0.6), 0 4px 24px rgba(0, 0, 0, 0.35);
  filter: contrast(1.06) saturate(1.07) brightness(1.02);
}

/* Feature cards ("why buyers are considering titanium") */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: clamp(16px, 2vw, 24px); }
.feature-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(24px, 2.6vw, 34px);
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(21, 21, 21, 0.07); }
.feature-card__icon { display: block; margin-bottom: 22px; }
.feature-card__title { font-family: var(--font-display); font-weight: 400; font-size: 25px; margin: 0 0 10px; }
.feature-card__text { font-size: 15px; line-height: 1.65; color: var(--muted); margin: 0; }

/* Showcase ("built around real kitchen use") */
.showcase-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: clamp(28px, 3.6vw, 44px);
}
.showcase-head .section-heading { margin: 0; max-width: 18ch; }
.showcase-head p { font-size: 15.5px; color: rgba(247, 245, 241, 0.62); margin: 0; max-width: 40ch; line-height: 1.6; }
.showcase-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: clamp(16px, 2vw, 22px); }
.showcase-card { border-radius: 16px; overflow: hidden; background: var(--ink); border: 1px solid rgba(185, 190, 195, 0.16); }
.showcase-card__image { width: 100%; height: clamp(240px, 30vw, 340px); object-fit: cover; }
.showcase-card__body { padding: 24px 26px 28px; }
.showcase-card__title { font-family: var(--font-display); font-weight: 400; font-size: 24px; margin: 0 0 8px; }
.showcase-card__text { font-size: 15px; line-height: 1.65; color: rgba(247, 245, 241, 0.66); margin: 0; }

/* Comparison */
.compare-footnote { font-size: 12.5px; color: var(--muted-2); margin: 16px 0 0; }

.compare-mobile { display: flex; flex-direction: column; gap: 12px; }
.compare-mobile__card { background: var(--white); border: 1px solid var(--border); border-radius: 14px; padding: 22px 20px; }
.compare-mobile__label {
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted-2);
  padding-bottom: 14px; border-bottom: 1px solid var(--border-soft);
}
.compare-mobile__rows { display: flex; flex-direction: column; gap: 14px; padding-top: 14px; }
.compare-mobile__row-name { font-size: 13px; color: var(--muted-2); margin-bottom: 4px; }
.compare-mobile__row-name--katori { color: var(--green); font-weight: 600; }
.compare-mobile__row-value { font-size: 15px; line-height: 1.55; color: var(--nav-text); }
.compare-mobile__row-value--katori { color: var(--body-text); }

.compare-table-wrap { background: var(--white); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; }
.compare-table-scroll { overflow-x: auto; }
.compare-table { width: 100%; border-collapse: collapse; min-width: 640px; font-size: 15px; }
.compare-table th, .compare-table td { text-align: left; padding: 20px 24px; border-bottom: 1px solid var(--border-soft); }
.compare-table thead th { padding: 22px 24px; border-bottom: 1px solid var(--border); font-weight: 500; }
.compare-table__row-header { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted-2); width: 26%; }
.compare-table__head-katori {
  background: #F2F5F3; font-family: var(--font-display); font-weight: 400; font-size: 21px; color: var(--green); width: 28%;
}
.compare-table__head-plain { font-family: var(--font-display); font-weight: 400; font-size: 21px; color: var(--ink); }
.compare-table__cell-label { color: var(--muted-2); font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; }
.compare-table__cell-katori { background: #F7FAF8; color: var(--body-text); line-height: 1.55; }
.compare-table__cell { color: var(--nav-text); line-height: 1.55; }
.compare-table tbody tr:last-child td { border-bottom: none; }

/* Show/hide comparison layout by viewport instead of JS-computed state */
.compare-mobile { display: none; }
@media (max-width: 759px) {
  .compare-mobile { display: flex; }
  .compare-table-wrap { display: none; }
}

/* Details ("a closer look at Katori") */
.details__grid { display: flex; flex-wrap: wrap; gap: clamp(32px, 4vw, 64px); align-items: center; }
.details__image-col { flex: 1 1 420px; min-width: min(100%, 320px); }
.details__image { width: 100%; height: auto; border-radius: 16px; box-shadow: 0 30px 70px rgba(21, 21, 21, 0.16); }
.details__content { flex: 1 1 400px; min-width: min(100%, 320px); }
.details__title { font-family: var(--font-display); font-weight: 400; font-size: clamp(30px, 3.6vw, 46px); line-height: 1.1; margin: 0 0 18px; }
.details__text { font-size: 16px; line-height: 1.65; color: var(--muted); margin: 0 0 30px; max-width: 52ch; }

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 30px;
}
.spec-card { background: var(--white); padding: 22px 24px; }
.spec-card__label { font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 8px; }
.spec-card__value { font-family: var(--font-display); font-size: 26px; line-height: 1.15; }
.spec-card__sub { font-size: 14px; color: var(--muted); margin-top: 4px; }

.detail-list { display: flex; flex-direction: column; gap: 14px; margin-bottom: 34px; }
.detail-list__item { display: flex; gap: 14px; align-items: flex-start; }
.detail-list__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--silver); margin-top: 8px; flex: none; }
.detail-list__text { font-size: 15.5px; line-height: 1.6; color: var(--body-text); }

/* Suitability ("is Katori right for your kitchen") */
.fit-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: clamp(16px, 2vw, 24px); }
.fit-card { background: var(--white); border: 1px solid var(--border); border-top: 3px solid var(--silver); border-radius: 14px; padding: clamp(26px, 3vw, 38px); }
.fit-card--positive { border-top-color: var(--green); }
.fit-card__title { font-family: var(--font-display); font-weight: 400; font-size: 26px; margin: 0 0 22px; }
.fit-list { display: flex; flex-direction: column; gap: 15px; }
.fit-list__item { display: flex; gap: 13px; align-items: flex-start; }
.fit-list__marker { font-size: 15px; line-height: 1.6; flex: none; color: var(--silver); }
.fit-card--positive .fit-list__marker { color: var(--green); }
.fit-list__text { font-size: 15.5px; line-height: 1.6; color: var(--nav-text); }
.fit-card--positive .fit-list__text { color: var(--body-text); }

/* Buying confidence */
.confidence__grid { display: flex; flex-wrap: wrap; gap: clamp(32px, 4vw, 56px); align-items: center; }
.confidence__content { flex: 1 1 380px; min-width: min(100%, 300px); }
.confidence__title { font-family: var(--font-display); font-weight: 400; font-size: clamp(28px, 3.2vw, 40px); line-height: 1.12; margin: 0 0 18px; }
.confidence__text { font-size: 16px; line-height: 1.7; color: var(--nav-text); margin: 0 0 12px; max-width: 50ch; }
.confidence__text strong { font-weight: 600; color: var(--ink); }
.confidence__subtext { font-size: 14.5px; line-height: 1.7; color: var(--muted); margin: 0 0 28px; max-width: 50ch; }
.confidence__media { flex: 1 1 340px; min-width: min(100%, 280px); }
.confidence__image { width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--border); }
.confidence__caption { font-size: 12px; color: var(--muted-2); margin: 10px 0 0; }

/* FAQ */
.faq__list { display: flex; flex-direction: column; gap: 10px; }
.faq__item { background: var(--white); border: 1px solid var(--border); border-radius: 14px; padding: 4px 24px; }
.faq__summary {
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  padding: 22px 0; font-size: 17px; font-weight: 500; min-height: 44px;
}
.faq__plus { font-size: 20px; color: var(--green); transition: transform 180ms ease; line-height: 1; flex: none; }
.faq__answer { font-size: 15.5px; line-height: 1.7; color: var(--muted); margin: 0 0 22px; max-width: 62ch; }

/* Final CTA */
.final-cta { position: relative; background: var(--ink); color: var(--paper); overflow: hidden; }
.final-cta__bg-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.5; }
.final-cta__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(21, 21, 21, 0.96) 0%, rgba(21, 21, 21, 0.86) 44%, rgba(21, 21, 21, 0.35) 100%);
}
.final-cta__inner { position: relative; padding-top: clamp(64px, 8vw, 132px); padding-bottom: clamp(64px, 8vw, 132px); }
.final-cta__content { max-width: 620px; }
.final-cta__title { font-family: var(--font-display); font-weight: 400; font-size: clamp(32px, 4.4vw, 56px); line-height: 1.07; margin: 0 0 18px; }
.final-cta__text { font-size: clamp(15.5px, 1.2vw, 17px); line-height: 1.65; color: rgba(247, 245, 241, 0.72); margin: 0 0 32px; max-width: 46ch; }
.final-cta__note { font-size: 12.5px; color: rgba(185, 190, 195, 0.66); margin: 16px 0 0; }

/* Footer */
.site-footer { background: var(--ink-2); color: rgba(247, 245, 241, 0.6); padding: clamp(44px, 5vw, 70px) 0 clamp(90px, 8vw, 60px); }
.site-footer__top {
  display: flex; flex-wrap: wrap; gap: 26px; justify-content: space-between; align-items: flex-start;
  padding-bottom: 28px; border-bottom: 1px solid rgba(185, 190, 195, 0.16);
}
.site-footer__brand-name { font-family: var(--font-display); font-size: 21px; color: var(--paper); }
.site-footer__brand-tag { font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; margin-top: 5px; }
.site-footer__nav { display: flex; flex-wrap: wrap; gap: 22px; font-size: 14px; }
.site-footer__link { color: rgba(247, 245, 241, 0.6); }
.site-footer__link:hover { color: var(--paper); }
.site-footer__disclaimer { font-size: 12.5px; line-height: 1.7; margin: 24px 0 0; max-width: 88ch; }

/* Sticky mobile CTA */
.sticky-cta {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
  background: rgba(21, 21, 21, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid rgba(185, 190, 195, 0.2);
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;
  transition: transform 220ms ease, opacity 220ms ease;
}
.sticky-cta.is-visible { transform: translateY(0); opacity: 1; pointer-events: auto; }
.sticky-cta__link {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  background: linear-gradient(180deg, var(--green-light) 0%, var(--green) 100%);
  color: var(--white);
  padding: 15px 22px;
  border-radius: 12px;
  box-shadow: 0 10px 26px rgba(31, 90, 70, 0.4);
  transition: background 170ms ease;
}
.sticky-cta__link:hover { background: linear-gradient(180deg, var(--green-hover) 0%, var(--green) 100%); color: var(--white); }
.sticky-cta__title { font-size: 14.5px; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; }
.sticky-cta__sub { font-size: 12px; color: rgba(255, 255, 255, 0.75); letter-spacing: 0.02em; }

@media (min-width: 900px) {
  .sticky-cta { display: none; }
}

/* Legal pages */
.legal-hero { background: var(--ink); color: var(--paper); padding: clamp(48px, 6vw, 84px) 0 clamp(36px, 5vw, 56px); }
.legal-hero__eyebrow { font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--silver); margin: 0 0 14px; }
.legal-hero__title { font-family: var(--font-display); font-weight: 400; font-size: clamp(32px, 4.4vw, 52px); line-height: 1.08; margin: 0; }
.legal-hero__updated { font-size: 13px; color: rgba(247, 245, 241, 0.6); margin: 16px 0 0; }

.legal-content { padding-top: clamp(44px, 6vw, 72px); padding-bottom: clamp(56px, 7vw, 96px); }
.legal-content h2 {
  font-family: var(--font-display); font-weight: 400; font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.2; margin: 40px 0 14px;
}
.legal-content h2:first-child { margin-top: 0; }
.legal-content p { font-size: 16px; line-height: 1.75; color: var(--nav-text); margin: 0 0 18px; max-width: 68ch; }
.legal-content ul { margin: 0 0 18px; padding-left: 22px; max-width: 68ch; }
.legal-content li { font-size: 16px; line-height: 1.75; color: var(--nav-text); margin-bottom: 8px; }
.legal-content a { text-decoration: underline; }
.legal-content strong { color: var(--ink); font-weight: 600; }
.legal-content .legal-note {
  background: var(--white); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px 22px; font-size: 14.5px; color: var(--muted); max-width: 68ch;
}

.back-link { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; margin-bottom: 8px; }