/* =========================================================================
   水垢離 みずごり — style.css
   Aesthetic: a cold-water measuring instrument, read in porcelain daylight.
   Porcelain off-white is the dominant ground (light base — a deliberate
   reversal of the recent dark-hero streak). Ice cyan is the FUNCTIONAL colour
   of water & temperature. Iron navy is ink & structure — the 締め — used only
   in small areas (pr-bar, footer, headings, risers).
   Signature: 水温の到達階段 (the temperature-arrival staircase) — a staircase
   that descends to the right, warm tap water at the top step, chiller-cold at
   the bottom. Not a scale-bar-plus-list; the steps themselves carry the reading.
   Fonts: Shippori Mincho (display / ritual water) / Noto Sans JP (body) /
   IBM Plex Mono (instrument readouts).
   ========================================================================= */

:root {
  /* --- porcelain (the dominant light ground) --- */
  --porcelain:   #EDF3F5;  /* cool glazed off-white — page ground, largest surface */
  --porcelain-2: #F8FBFC;  /* raised card on porcelain */
  --porcelain-3: #FFFFFF;  /* pure white — product figure ground */
  --mist:        #E1EBEF;  /* recessed strip */
  --mist-line:   #D2E0E6;  /* hairline */
  --mist-soft:   #E8F0F3;

  /* --- iron navy (ink / structure / 締め — small dark areas only) --- */
  --iron:        #16283A;  /* iron navy — pr-bar, footer, dark seams */
  --iron-2:      #1E3346;  /* raised panel on iron */
  --iron-line:   #2C4257;
  --ink:         #172733;  /* body text — deep cold near-navy */
  --ink-soft:    #56707E;  /* muted caption ink (cool blue-gray) */

  /* --- ice cyan (the water / temperature functional colour) --- */
  --ice:         #0E93AC;  /* functional cyan — text on porcelain (AA) */
  --ice-deep:    #0A7387;  /* deeper cyan — strong text / hover */
  --ice-bright:  #37C3DA;  /* bright cyan — diagram fills, cold end */
  --ice-mid:     #59CFE0;  /* mid staircase */
  --ice-glow:    #7FDCE9;  /* warm-cool upper step */
  --ice-pale:    #D3ECF2;  /* pale cyan wash */
  --ice-line:    #A9DCE6;

  --amazon:      #16283A;
  --amazon-h:    #0B1824;
  --rakuten:     #9C2B1B;

  --font-head: 'Shippori Mincho', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --font-sans: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', monospace;

  /* background-image slots (swapped for generated photo-illustration; the
     gradient here is the build-time placeholder, replaced by var override). */
  --hero-bg: radial-gradient(120% 90% at 78% 8%, rgba(127,220,233,0.42), transparent 55%),
             radial-gradient(90% 70% at 12% 92%, rgba(55,195,218,0.22), transparent 60%);
  --band-bg: linear-gradient(90deg, rgba(55,195,218,0.10), rgba(127,220,233,0.05));
  --article-bg: radial-gradient(120% 120% at 85% -10%, rgba(127,220,233,0.4), transparent 55%);

  --wrap: 1120px;
  --gutter: clamp(18px, 4vw, 44px);
  --radius: 5px;
  --radius-lg: 14px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--ink);
  background: var(--porcelain);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--ice-deep); text-decoration: none; }
a:hover { color: var(--ice); }

h1, h2, h3 { font-family: var(--font-head); font-weight: 800; line-height: 1.34; letter-spacing: 0.01em; margin: 0; }

.wrap { width: min(100%, var(--wrap)); margin-inline: auto; padding-inline: var(--gutter); }

.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;
}

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 200;
  background: var(--ice); color: #04222A; font-weight: 700; font-family: var(--font-head);
  padding: 10px 18px; border-radius: var(--radius); transition: top .18s ease;
}
.skip-link:focus { top: 12px; }

:where(a, button, input, textarea, [tabindex]):focus-visible {
  outline: 3px solid var(--ice-bright);
  outline-offset: 2px;
  border-radius: 3px;
}

/* --- PR bar (iron — a thin 締め seam) --- */
.pr-bar {
  background: var(--iron);
  color: var(--ice-glow);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  text-align: center;
  padding: 7px 16px;
}
.pr-bar strong { color: var(--ice-bright); font-weight: 600; margin-left: 4px; }

/* --- header (porcelain, light) --- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(237,243,245,0.9);
  backdrop-filter: blur(9px);
  border-bottom: 1px solid var(--mist-line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; gap: 20px;
}
.brand {
  display: inline-flex; align-items: center; gap: 11px;
  font-family: var(--font-head); font-weight: 800; font-size: 20px;
  color: var(--iron); letter-spacing: 0.06em; white-space: nowrap;
}
.brand:hover { color: var(--iron); }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand .yomi { font-family: var(--font-mono); font-size: 10px; font-weight: 400; color: var(--ice); letter-spacing: 0.18em; margin-left: -4px; align-self: flex-end; padding-bottom: 4px; }
.site-nav { display: flex; gap: 22px; flex-wrap: wrap; }
.site-nav a {
  font-size: 13.5px; font-weight: 500; color: var(--ink-soft);
  letter-spacing: 0.03em; padding: 4px 0; border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--ice-deep); border-bottom-color: var(--ice-bright); }
@media (max-width: 760px) {
  .site-header .wrap { flex-direction: column; align-items: flex-start; min-height: 0; padding-block: 10px; gap: 8px; }
  .site-nav { gap: 16px; }
  .site-nav a { font-size: 12.5px; }
}

/* =========================================================================
   HERO — porcelain daylight, a still water surface with ice
   ========================================================================= */
.hero {
  position: relative;
  background: var(--porcelain);
  color: var(--ink);
  overflow: hidden;
  isolation: isolate;
  border-bottom: 1px solid var(--mist-line);
}
.hero-media { position: absolute; inset: 0; z-index: -3; overflow: hidden; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; opacity: 0.5; }
.hero::before {
  /* placeholder water-light wash (replaced by generated bg via --hero-bg) */
  content: ""; position: absolute; inset: 0; z-index: -2;
  background: var(--hero-bg);
}
.hero::after {
  /* porcelain legibility veil over any photographic bg + faint caustic lines */
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(90deg, rgba(237,243,245,0.95) 0%, rgba(237,243,245,0.7) 46%, rgba(237,243,245,0.28) 100%),
    repeating-linear-gradient(64deg, rgba(55,195,218,0.05) 0 2px, transparent 2px 22px);
}
.hero .wrap { padding-block: clamp(58px, 9vw, 110px); position: relative; }
.hero-eyebrow {
  font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase; color: var(--ice-deep);
  display: inline-flex; align-items: center; gap: 10px; margin-bottom: 22px;
}
.hero-eyebrow::before { content: ""; width: 28px; height: 2px; background: var(--ice-bright); display: inline-block; }
.hero h1 {
  font-size: clamp(2.05rem, 6vw, 3.9rem);
  line-height: 1.32; letter-spacing: 0.02em;
  max-width: 17ch; margin-bottom: 24px; color: var(--iron);
  font-weight: 800;
}
.hero h1 .cold {
  color: var(--ice-deep); position: relative; white-space: nowrap;
}
.hero h1 .cold::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -0.08em; height: 0.13em;
  background: linear-gradient(90deg, var(--ice-bright), var(--ice-glow));
  border-radius: 2px;
}
.hero-lead {
  max-width: 55ch; font-size: clamp(0.99rem, 1.6vw, 1.1rem);
  color: var(--ink); line-height: 1.98; margin-bottom: 34px;
}
.hero-lead .voice { color: var(--ice-deep); font-weight: 600; }
.hero-cta {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--iron); color: var(--porcelain);
  font-family: var(--font-head); font-weight: 700; font-size: 15px; letter-spacing: 0.04em;
  padding: 14px 28px; border-radius: var(--radius);
  transition: transform .16s ease, background .16s ease;
}
.hero-cta:hover { background: var(--ice-deep); color: #fff; transform: translateY(-2px); }
.hero-cta span { font-family: var(--font-mono); }

.hero-stats { display: flex; flex-wrap: wrap; gap: 32px; margin-top: 48px; }
.hero-stat { position: relative; padding-left: 16px; }
.hero-stat::before { content: ""; position: absolute; left: 0; top: 5px; bottom: 5px; width: 3px; background: var(--ice-bright); border-radius: 2px; }
.hero-stat .num { font-family: var(--font-mono); font-weight: 600; font-size: 29px; color: var(--iron); line-height: 1; }
.hero-stat .label { font-size: 12px; color: var(--ink-soft); margin-top: 8px; letter-spacing: 0.02em; }

/* the water line at the bottom of the hero */
.hero-waterline {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 12px;
  border-top: 2px solid var(--ice-bright);
  padding: 12px var(--gutter);
  background: rgba(211,236,242,0.5);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em;
  color: var(--ice-deep);
}
.hero-waterline .tick { color: var(--ice-deep); font-weight: 600; white-space: nowrap; }
.hero-waterline span:last-child { color: var(--ink-soft); }

/* =========================================================================
   SIGNATURE — 水温の到達階段 (staircase descending to the right)
   ========================================================================= */
.stair-section {
  position: relative;
  background:
    linear-gradient(180deg, var(--porcelain) 0%, var(--mist-soft) 100%);
  border-bottom: 1px solid var(--mist-line);
}
.stair-section .wrap { padding-block: clamp(54px, 8vw, 92px); position: relative; }
.stair-head { max-width: 64ch; margin-bottom: 38px; }
.section-eyebrow {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.19em; text-transform: uppercase; color: var(--ice-deep);
  display: flex; align-items: center; gap: 9px; margin-bottom: 14px;
}
.stair-head h2 { font-size: clamp(1.6rem, 3.6vw, 2.45rem); color: var(--iron); margin-bottom: 14px; }
.stair-head p { color: var(--ink); max-width: 62ch; }
.stair-head strong { color: var(--iron); }

/* the staircase itself: a stepped set of tread-buttons dropping to the right */
.stair {
  position: relative;
  border: 1px solid var(--mist-line);
  border-radius: var(--radius-lg);
  background:
    var(--band-bg),
    url('images/texture-band.jpg') center/cover no-repeat,
    var(--porcelain-2);
  padding: clamp(20px, 3vw, 34px) clamp(16px, 3vw, 30px) clamp(24px, 3vw, 34px);
  overflow: hidden;
}
/* faint water pool that rises under the coldest tread */
.stair::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 34%;
  background:
    repeating-linear-gradient(76deg, rgba(55,195,218,0.07) 0 2px, transparent 2px 16px),
    linear-gradient(180deg, transparent, rgba(55,195,218,0.10));
  pointer-events: none;
}
.stair-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr; gap: 0; }

.step {
  position: relative;
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px;
  width: 100%; text-align: left;
  background: var(--porcelain-3);
  border: 1px solid var(--mist-line);
  border-left: 5px solid var(--step-c, var(--ice-mid));
  border-radius: var(--radius);
  padding: 15px 18px;
  color: var(--ink); cursor: pointer;
  font-family: inherit;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  box-shadow: 0 2px 0 rgba(22,40,58,0.03);
}
/* each successive step drops down (natural stacking) AND indents right, so the
   whole reads as a staircase descending toward the cold basin. */
.step + .step { margin-top: 14px; }
.step[data-depth="0"] { margin-left: 0%;  width: 100%; }
.step[data-depth="1"] { margin-left: 9%;  width: 91%; }
.step[data-depth="2"] { margin-left: 18%; width: 82%; }
/* riser connecting one tread down to the next */
.step[data-depth="1"]::before,
.step[data-depth="2"]::before {
  content: ""; position: absolute; left: -1px; top: -15px; width: 2px; height: 15px;
  background: var(--mist-line);
}
.step:hover { transform: translateX(3px); box-shadow: 0 10px 22px -14px rgba(14,147,172,0.5); }
/* active frame: a dark iron ring so it stays visible on the porcelain ground
   even when --step-c is a very light cyan (steps 01/02). */
.step.is-active { border-color: var(--step-c, var(--ice)); box-shadow: 0 0 0 2px var(--iron); }
/* step number: iron on white passes WCAG AA (~15:1) at every --step-c;
   the step colour identity moves to the ring so the light fills no longer
   sit under white text (which failed 4.5:1). */
.step-mark {
  font-family: var(--font-mono); font-weight: 700; font-size: 12px;
  color: var(--iron); background: #fff;
  border: 2px solid var(--step-c, var(--ice-mid));
  width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; flex: none;
}
.step-body .step-method { font-family: var(--font-head); font-weight: 700; font-size: 16px; color: var(--iron); letter-spacing: 0.02em; }
.step-body .step-note { font-size: 11.5px; color: var(--ink-soft); line-height: 1.6; margin-top: 2px; }
.step-temp {
  text-align: right; white-space: nowrap;
}
.step-temp .t-val { font-family: var(--font-mono); font-weight: 600; font-size: 20px; color: var(--step-c, var(--ice)); line-height: 1.1; }
.step-temp .t-lab { display: block; font-size: 9.5px; font-family: var(--font-mono); color: var(--ink-soft); letter-spacing: 0.04em; margin-top: 3px; }

.stair-readout {
  position: relative; z-index: 1;
  margin-top: 22px; padding: 16px 19px;
  background: var(--porcelain-2); border: 1px dashed var(--ice-line);
  border-radius: var(--radius); font-size: 13.5px; color: var(--ink); line-height: 1.78;
}
.stair-readout b { color: var(--ice-deep); font-family: var(--font-head); }
.stair-readout .step-lane-link {
  display: inline-block; margin-top: 8px; font-family: var(--font-mono);
  font-size: 12px; color: var(--ice-deep); font-weight: 600; letter-spacing: 0.03em;
}
.stair-readout .step-lane-link:hover { color: var(--ice); }
.stair-source {
  margin-top: 14px; font-size: 11.5px; line-height: 1.7; color: var(--ink-soft);
}
.stair-source a { color: var(--ice-deep); text-decoration: underline; }
.stair-aside {
  margin-top: 12px; font-size: 12px; color: var(--ink-soft); line-height: 1.7;
  padding-left: 12px; border-left: 2px solid var(--ice-line);
}

@media (max-width: 620px) {
  .step { grid-template-columns: auto 1fr; row-gap: 6px; }
  .step-temp { grid-column: 2; text-align: left; }
  .step[data-depth="1"] { margin-left: 5%; width: 95%; }
  .step[data-depth="2"] { margin-left: 10%; width: 90%; }
}

/* =========================================================================
   LANE NAV — pills
   ========================================================================= */
.lane-nav { background: var(--mist); border-bottom: 1px solid var(--mist-line); position: sticky; top: 63px; z-index: 40; }
@media (max-width: 760px) { .lane-nav { position: static; } }
.lane-nav .wrap { padding-block: 12px; }
.lane-nav-list { display: flex; gap: 10px; overflow-x: auto; scrollbar-width: thin; -webkit-overflow-scrolling: touch; }
.lane-pill {
  flex: none; font-family: var(--font-head); font-weight: 700; font-size: 12.5px;
  color: var(--iron); background: var(--porcelain-2); border: 1px solid var(--mist-line);
  padding: 8px 15px; border-radius: 999px; white-space: nowrap; transition: all .14s ease; letter-spacing: 0.02em;
}
.lane-pill:hover { background: var(--iron); color: var(--porcelain); border-color: var(--iron); }
.lane-pill.is-cued { background: var(--ice); color: #04222A; border-color: var(--ice); box-shadow: 0 0 0 3px rgba(55,195,218,0.28); }

/* =========================================================================
   LANE SECTIONS — porcelain, product grid
   ========================================================================= */
.lane-section { padding-block: clamp(48px, 6vw, 78px); border-bottom: 1px solid var(--mist-soft); scroll-margin-top: 78px; }
.lane-section:nth-of-type(even) { background: var(--porcelain-2); }
.lane-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 20px; margin-bottom: 30px; flex-wrap: wrap;
}
.lane-head-main { display: flex; align-items: flex-start; gap: 16px; }
.lane-icon { flex: none; width: 48px; height: 48px; display: grid; place-items: center; background: var(--iron); border-radius: 11px; margin-top: 4px; }
.lane-icon svg { width: 28px; height: 28px; }
@media (max-width: 520px) { .lane-icon { width: 42px; height: 42px; } .lane-icon svg { width: 24px; height: 24px; } }
.lane-head .section-eyebrow { color: var(--ice-deep); }
.lane-head h2 { font-size: clamp(1.45rem, 3.2vw, 2.05rem); color: var(--iron); margin-bottom: 12px; }
.lane-desc { max-width: 62ch; color: var(--ink); font-size: 15px; }
.lane-desc .voice { color: var(--ice-deep); font-weight: 600; box-shadow: inset 0 -0.5em 0 rgba(55,195,218,0.16); }
.lane-desc strong { color: var(--iron); }
.lane-map-tag {
  flex: none; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.03em;
  color: var(--ice-deep); background: rgba(55,195,218,0.12);
  border: 1px solid var(--ice-line); border-radius: 999px; padding: 6px 13px;
}

.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 20px; }

.product-card {
  display: flex; flex-direction: column;
  background: var(--porcelain-2); border: 1px solid var(--mist-line);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.product-card:hover { transform: translateY(-3px); box-shadow: 0 20px 36px -24px rgba(14,88,110,0.55); border-color: var(--ice-line); }
.product-figure {
  aspect-ratio: 4 / 3; background: var(--porcelain-3);
  border-bottom: 1px solid var(--mist-line); overflow: hidden;
  position: relative;
}
.product-image {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: contain; padding: 12px; box-sizing: border-box;
  min-width: 0; min-height: 0;
}
.product-body { padding: 16px 17px 18px; display: flex; flex-direction: column; gap: 11px; flex: 1; }
.product-name { font-size: 15px; font-weight: 700; line-height: 1.55; color: var(--ink); font-family: var(--font-sans); }
.product-specs { display: flex; flex-wrap: wrap; gap: 6px; }
.spec-chip {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.01em;
  color: var(--ink-soft); background: var(--mist);
  border: 1px solid var(--mist-line); border-radius: 3px; padding: 3px 8px;
}
.spec-chip.is-price { color: var(--ice-deep); background: rgba(55,195,218,0.10); border-color: var(--ice-line); font-weight: 600; }
.product-reason { font-size: 13px; color: var(--ink-soft); line-height: 1.78; margin: 0; }

.offers { display: flex; gap: 9px; margin-top: auto; padding-top: 4px; }
.offer {
  position: relative; flex: 1;
  display: flex; flex-direction: column; align-items: flex-start; justify-content: center;
  padding: 10px 13px; border-radius: var(--radius);
  font-family: var(--font-head); text-decoration: none;
  transition: transform .14s ease, filter .14s ease, background .14s ease;
}
.offer:hover { transform: translateY(-2px); }
.offer--amazon { background: var(--amazon); color: var(--porcelain); }
.offer--amazon:hover { background: var(--amazon-h); color: var(--porcelain); }
.offer--rakuten { background: var(--rakuten); color: #fff; }
.offer--rakuten:hover { filter: brightness(1.08); color: #fff; }
.offer-store { font-weight: 700; font-size: 14px; line-height: 1.1; }
.offer-go { font-size: 11px; font-weight: 500; opacity: 0.88; display: inline-flex; align-items: center; gap: 4px; font-family: var(--font-sans); }
.offer-arrow { font-family: var(--font-mono); }
.pr-tag {
  position: absolute; top: 6px; right: 7px;
  font-family: var(--font-mono); font-size: 10px; font-weight: 600; letter-spacing: 0.05em;
  background: rgba(255,255,255,0.18); color: #fff; padding: 1px 4px; border-radius: 2px;
}
.offer-note { font-size: 11.5px; color: var(--ink-soft); line-height: 1.55; margin: 8px 0 0; }

/* =========================================================================
   EEAT — a porcelain card with an iron seam
   ========================================================================= */
.eeat-section { background: var(--mist-soft); padding-block: clamp(50px, 7vw, 82px); border-bottom: 1px solid var(--mist-line); }
.eeat-section .section-eyebrow { color: var(--ice-deep); justify-content: flex-start; }
.eeat-card { display: grid; grid-template-columns: 200px 1fr; gap: 34px; align-items: start; margin-top: 22px;
  background: var(--porcelain-2); border: 1px solid var(--mist-line); border-left: 5px solid var(--ice-bright);
  border-radius: var(--radius-lg); padding: 30px; }
@media (max-width: 660px) { .eeat-card { grid-template-columns: 1fr; gap: 20px; } }
.eeat-photo img { border-radius: var(--radius-lg); border: 1px solid var(--mist-line); aspect-ratio: 1/1; object-fit: cover; }
.eeat-body h3 { font-size: 1.3rem; color: var(--iron); margin-bottom: 14px; }
.eeat-body p { color: var(--ink); font-size: 14.5px; margin: 0 0 13px; }
.eeat-body a { font-weight: 600; }

/* =========================================================================
   ARTICLES / FAQ / DISCLOSURE / CROSSLINK
   ========================================================================= */
.articles-section { padding-block: clamp(48px, 6vw, 78px); background: var(--porcelain); }
.articles-section .section-eyebrow { color: var(--ice-deep); }
.articles-section h2 { font-size: clamp(1.4rem, 3vw, 1.95rem); color: var(--iron); }
.article-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.article-card {
  display: flex; flex-direction: column; background: var(--porcelain-2);
  border: 1px solid var(--mist-line); border-radius: var(--radius-lg); overflow: hidden;
  transition: transform .16s ease, box-shadow .16s ease;
}
.article-card:hover { transform: translateY(-3px); box-shadow: 0 20px 36px -24px rgba(14,88,110,0.45); }
.article-figure { aspect-ratio: 3/2; overflow: hidden; background: var(--mist); }
.article-figure img { width: 100%; height: 100%; object-fit: cover; }
.article-card-body { padding: 18px 19px 22px; }
.kicker { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.13em; text-transform: uppercase; color: var(--ice-deep); margin-bottom: 10px; }
.article-card-body h3 { font-size: 1.1rem; color: var(--iron); line-height: 1.5; margin-bottom: 9px; }
.article-card-body p { font-size: 13px; color: var(--ink-soft); margin: 0; line-height: 1.7; }

.crosslink-section { padding-block: 0 clamp(48px, 6vw, 70px); background: var(--porcelain); }
.crosslink-card {
  background: var(--iron); color: var(--porcelain);
  border-radius: var(--radius-lg); padding: 28px 30px;
  display: flex; align-items: center; justify-content: space-between; gap: 22px; flex-wrap: wrap;
  border-left: 5px solid var(--ice-bright);
}
.crosslink-card p { margin: 0; font-size: 14px; color: rgba(237,243,245,0.88); max-width: 62ch; }
.crosslink-cta {
  flex: none; font-family: var(--font-head); font-weight: 700; font-size: 13.5px; letter-spacing: 0.03em;
  color: var(--iron); background: var(--ice-glow); padding: 11px 20px; border-radius: var(--radius);
  white-space: nowrap;
}
.crosslink-cta:hover { background: var(--ice-bright); color: var(--iron); }

.faq-section { padding-block: clamp(42px, 5vw, 66px); background: var(--porcelain-2); border-top: 1px solid var(--mist-soft); }
.faq-section .section-eyebrow { color: var(--ice-deep); }
.faq-section h2 { font-size: clamp(1.35rem, 3vw, 1.85rem); color: var(--iron); }
.faq-item { border-top: 1px solid var(--mist-line); padding: 20px 0; }
.faq-item:last-child { border-bottom: 1px solid var(--mist-line); }
.faq-item h3 { font-size: 1.05rem; color: var(--iron); margin-bottom: 8px; }
.faq-item p { margin: 0; font-size: 14px; color: var(--ink-soft); }

.disclosure-section { padding-block: 0 clamp(42px, 5vw, 62px); background: var(--porcelain-2); }
.disclosure-box {
  background: var(--porcelain); border: 1px solid var(--mist-line);
  border-left: 5px solid var(--ink-soft); border-radius: var(--radius);
  padding: 20px 22px; font-size: 12.5px; color: var(--ink-soft); line-height: 1.85;
}
.disclosure-box strong { color: var(--iron); }

/* safety callout — the single warm accent in an otherwise cold porcelain
   palette, reserved for cold-water / electrical safety (reads as 注意). */
.safety-callout {
  background: #FBF3F1; border: 1px solid #E6C7C0;
  border-left: 5px solid var(--rakuten); border-radius: var(--radius);
  padding: 20px 22px; margin: 24px 0; font-size: 13.5px; color: var(--ink); line-height: 1.85;
}
.safety-callout .safety-title {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-head); font-weight: 700; font-size: 15.5px;
  color: var(--rakuten); margin: 0 0 10px; letter-spacing: 0.02em;
}
.safety-callout .safety-title::before {
  content: "▲"; font-size: 12px; line-height: 1;
}
.safety-callout ul { margin: 6px 0 0; padding-left: 1.25em; }
.safety-callout li { margin-bottom: 7px; }
.safety-callout li:last-child { margin-bottom: 0; }
.safety-callout .safety-source { margin: 12px 0 0; font-size: 12px; color: var(--ink-soft); }
.safety-callout a { color: var(--rakuten); text-decoration: underline; }
.safety-callout strong { color: var(--iron); }

/* =========================================================================
   FOOTER — iron navy (the dark 締め)
   ========================================================================= */
.site-footer { background: var(--iron); color: var(--porcelain); padding-block: 48px 30px; }
.footer-grid { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; padding-bottom: 26px; border-bottom: 1px solid var(--iron-line); }
.footer-brand { font-family: var(--font-head); font-weight: 800; font-size: 20px; color: var(--porcelain); letter-spacing: 0.06em; }
.footer-tag { font-size: 12.5px; color: rgba(237,243,245,0.6); margin: 8px 0 0; }
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; align-items: center; }
.footer-links a { font-size: 13px; color: var(--ice-glow); }
.footer-links a:hover { color: var(--ice-bright); }
.footer-bottom { padding-top: 22px; }
.footer-bottom p { margin: 0 0 6px; font-size: 11.5px; color: rgba(237,243,245,0.52); line-height: 1.7; }

/* =========================================================================
   CONTENT PAGES (about / privacy) + 404
   ========================================================================= */
.content-page { padding-block: clamp(42px, 6vw, 70px); max-width: 760px; }
.content-page h1 { font-size: clamp(1.7rem, 4vw, 2.5rem); color: var(--iron); margin-bottom: 22px; letter-spacing: 0.03em; }
.content-page h2 { font-size: 1.25rem; color: var(--iron); margin: 34px 0 12px; padding-left: 13px; border-left: 3px solid var(--ice-bright); }
.content-page p { margin: 0 0 16px; font-size: 15px; color: var(--ink); }
.content-page ul { margin: 0 0 16px; padding-left: 20px; }
.content-page li { margin-bottom: 8px; font-size: 14.5px; color: var(--ink); }

/* contact form */
.contact-form { margin-top: 20px; display: flex; flex-direction: column; gap: 16px; background: var(--porcelain-2); border: 1px solid var(--mist-line); border-radius: var(--radius-lg); padding: 24px; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.cf-field { display: flex; flex-direction: column; gap: 6px; }
.cf-field label { font-family: var(--font-head); font-weight: 700; font-size: 13.5px; color: var(--iron); display: flex; align-items: center; gap: 8px; }
.cf-req { font-family: var(--font-mono); font-size: 10px; color: var(--ice-deep); background: rgba(55,195,218,0.12); border: 1px solid var(--ice-line); padding: 1px 6px; border-radius: 3px; }
.cf-field input, .cf-field textarea {
  font-family: var(--font-sans); font-size: 15px; color: var(--ink);
  background: var(--porcelain-3); border: 1px solid var(--mist-line); border-radius: var(--radius);
  padding: 11px 13px; width: 100%; resize: vertical;
}
.cf-field input:focus, .cf-field textarea:focus { border-color: var(--ice); outline: none; box-shadow: 0 0 0 3px rgba(55,195,218,0.18); }
.contact-note { font-size: 12px; color: var(--ink-soft); margin: 0; }
.contact-submit {
  align-self: flex-start; font-family: var(--font-head); font-weight: 700; font-size: 15px; letter-spacing: 0.04em;
  color: var(--porcelain); background: var(--iron); border: none; border-radius: var(--radius);
  padding: 13px 32px; cursor: pointer; transition: background .15s ease, transform .15s ease;
}
.contact-submit:hover { background: var(--ice-deep); transform: translateY(-1px); }
.contact-submit:disabled { opacity: 0.6; cursor: default; transform: none; }
.contact-status { margin: 0; font-size: 14px; font-weight: 700; padding: 10px 14px; border-radius: var(--radius); }
.contact-status.is-sending { background: var(--mist); color: var(--ink-soft); }
.contact-status.is-ok { background: rgba(14,147,172,0.12); color: var(--ice-deep); border: 1px solid var(--ice-line); }
.contact-status.is-error { background: rgba(196,58,30,0.1); color: #A82E13; border: 1px solid rgba(196,58,30,0.3); }

/* =========================================================================
   ARTICLE PAGES
   ========================================================================= */
.article-hero { position: relative; isolation: isolate; background: var(--mist-soft); color: var(--ink); padding-block: clamp(46px, 7vw, 80px); overflow: hidden; border-bottom: 1px solid var(--mist-line); }
.article-hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--article-photo, none) center/cover no-repeat;
  opacity: 0.22;
}
.article-hero::after { content: ""; position: absolute; inset: 0; z-index: 0; background: var(--article-bg); opacity: 0.8; }
.article-hero .wrap { position: relative; z-index: 1; }
.article-hero .kicker { color: var(--ice-deep); }
.article-hero h1 { font-size: clamp(1.7rem, 4.4vw, 2.7rem); color: var(--iron); max-width: 24ch; margin-bottom: 18px; letter-spacing: 0.02em; }
.article-meta { display: flex; gap: 18px; flex-wrap: wrap; font-family: var(--font-mono); font-size: 12px; color: var(--ink-soft); }
.article-body { max-width: 720px; padding-block: clamp(40px, 5vw, 58px); }
.article-body p { font-size: 15.5px; line-height: 1.98; color: var(--ink); margin: 0 0 20px; }
.article-body h2 { font-size: clamp(1.25rem, 3vw, 1.6rem); color: var(--iron); margin: 42px 0 16px; padding-left: 14px; border-left: 4px solid var(--ice-bright); letter-spacing: 0.02em; }
.article-body .voice { color: var(--ice-deep); font-weight: 600; box-shadow: inset 0 -0.5em 0 rgba(55,195,218,0.14); }
.article-body strong { color: var(--iron); font-weight: 700; }
.inline-product-card {
  display: flex; gap: 16px; align-items: center; margin: 24px 0;
  background: var(--porcelain-2); border: 1px solid var(--mist-line);
  border-left: 4px solid var(--ice-bright); border-radius: var(--radius-lg); padding: 15px 17px;
}
.inline-product-card img { width: 92px; height: 92px; object-fit: contain; background: var(--porcelain-3); border-radius: var(--radius); flex: none; border: 1px solid var(--mist-line); }
.ipc-body { flex: 1; }
.ipc-name { font-family: var(--font-head); font-weight: 700; font-size: 14.5px; color: var(--iron); margin-bottom: 5px; }
.ipc-reason { font-size: 12.5px; color: var(--ink-soft); line-height: 1.7; margin: 0 0 8px; }
.ipc-link { font-family: var(--font-mono); font-size: 12px; font-weight: 600; color: var(--ice-deep); }
.article-note { font-size: 13px; color: var(--ink-soft); line-height: 1.8; }
.article-note strong { color: var(--iron); }

/* =========================================================================
   MISC
   ========================================================================= */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}