/* =========================================================
   NODA DUCT CLEANING — site styles
   Layout concept: the page follows the exhaust path. Light
   galvanized-steel sections for the shop side, soot-dark
   sections for the fire side; one ember accent for heat.
   All classes are prefixed nd- so they can live inside
   WordPress / Elementor without collisions.
   ========================================================= */
:root {
  /* color */
  --nd-zinc: #e6e9e8;      /* galvanized steel, page ground */
  --nd-zinc-2: #d6dbda;    /* panel */
  --nd-paper: #f3f4f2;     /* raised surface */
  --nd-line: #b4bcbb;      /* seams, rules */
  --nd-steel: #6f7978;     /* muted text on light */
  --nd-ink: #141819;       /* text */
  --nd-soot: #0f1213;      /* fire-side ground */
  --nd-soot-2: #1a1f21;    /* fire-side panel */
  --nd-soot-line: #2d3436;
  --nd-ash: #a7b0af;       /* muted text on dark */
  --nd-ember: #ff5a1f;     /* heat accent: fills, large type */
  --nd-ember-ink: #c23d0c; /* accent for small text on light */
  --nd-clean: #3c9e97;     /* "after" state, used only in meters */

  /* type */
  --nd-display: "Dela Gothic One", "Zen Kaku Gothic New", "Hiragino Sans", sans-serif;
  --nd-body: "Zen Kaku Gothic New", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  --nd-mono: "Martian Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* scale */
  --nd-fs-xs: 0.75rem;
  --nd-fs-sm: 0.875rem;
  --nd-fs-md: 1rem;
  --nd-fs-lg: clamp(1.125rem, 1rem + 0.4vw, 1.3rem);
  --nd-fs-xl: clamp(1.5rem, 1.2rem + 1.2vw, 2.25rem);
  --nd-fs-2xl: clamp(2rem, 1.4rem + 2.6vw, 3.75rem);
  --nd-fs-3xl: clamp(2.6rem, 1.6rem + 4.6vw, 6rem);

  --nd-gutter: clamp(16px, 4vw, 56px);
  --nd-max: 1320px;
  --nd-ease: cubic-bezier(0.2, 0.7, 0.1, 1);
  --nd-header-h: 72px;
  color-scheme: light;
}

/* ---------- base ---------- */
.nd-site, .nd-site * { box-sizing: border-box; }
.nd-site {
  margin: 0;
  background: var(--nd-zinc);
  color: var(--nd-ink);
  font-family: var(--nd-body);
  font-size: var(--nd-fs-md);
  line-height: 1.85;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
.nd-site img { max-width: 100%; height: auto; display: block; }
.nd-site a { color: inherit; }
.nd-site :focus-visible { outline: 2px solid var(--nd-ember); outline-offset: 3px; }
/* zero specificity, so a component's own margin or padding always wins */
:where(.nd-site) :where(h1, h2, h3, h4, p) { margin: 0; }
:where(.nd-site) :where(ul, ol) { margin: 0; padding: 0; list-style: none; }
.nd-wrap { width: 100%; max-width: var(--nd-max); margin-inline: auto; padding-inline: var(--nd-gutter); }
.nd-sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.nd-label {
  font-family: var(--nd-mono);
  font-size: var(--nd-fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--nd-steel);
  display: inline-flex; align-items: center; gap: 0.6em;
  line-height: 1.4;
}
.nd-label::before { content: ""; width: 1.6em; height: 1px; background: currentColor; }
.nd-dark .nd-label { color: var(--nd-ash); }

.nd-h2 {
  font-family: var(--nd-display);
  font-weight: 400;
  font-size: var(--nd-fs-2xl);
  line-height: 1.22;
  letter-spacing: 0.01em;
  text-wrap: balance;
}
.nd-lead { font-size: var(--nd-fs-lg); line-height: 1.95; max-width: 34em; color: var(--nd-ink); }
.nd-dark .nd-lead { color: #dfe4e3; }
.nd-em { color: var(--nd-ember-ink); }
.nd-dark .nd-em { color: var(--nd-ember); }

.nd-section { position: relative; padding-block: clamp(80px, 11vw, 168px); }
.nd-section-head { display: grid; gap: 22px; margin-bottom: clamp(40px, 6vw, 80px); max-width: 50rem; }
.nd-dark { background: var(--nd-soot); color: #eef1f0; }

/* ---------- buttons ---------- */
.nd-btn {
  --b-bg: var(--nd-ink); --b-fg: var(--nd-paper);
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 0.9em;
  min-height: 56px; padding: 0 28px;
  background: var(--b-bg); color: var(--b-fg);
  font-family: var(--nd-body); font-weight: 700; font-size: 1rem; letter-spacing: 0.04em;
  text-decoration: none; border: 0; border-radius: 0; cursor: pointer; white-space: nowrap;
  overflow: hidden; isolation: isolate;
  transition: color 0.35s var(--nd-ease);
}
.nd-btn::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--nd-ember);
  transform: scaleY(0); transform-origin: 50% 100%;
  transition: transform 0.45s var(--nd-ease);
}
.nd-btn:hover::after, .nd-btn:focus-visible::after { transform: scaleY(1); }
.nd-btn:hover, .nd-btn:focus-visible { color: var(--nd-ink); }
.nd-btn--ember { --b-bg: var(--nd-ember); --b-fg: var(--nd-ink); }
.nd-btn--ember::after { background: var(--nd-ink); }
.nd-btn--ember:hover, .nd-btn--ember:focus-visible { color: var(--nd-paper); }
.nd-btn--ghost { --b-bg: transparent; --b-fg: var(--nd-ink); box-shadow: inset 0 0 0 1px var(--nd-ink); }
.nd-btn__arrow { width: 18px; height: 18px; flex: none; transition: transform 0.45s var(--nd-ease); }
.nd-btn:hover .nd-btn__arrow { transform: translateX(4px); }

.nd-tel { display: inline-grid; gap: 2px; text-decoration: none; line-height: 1.2; }
.nd-tel__num { white-space: nowrap; font-family: var(--nd-display); font-size: 1.5rem; letter-spacing: 0.02em; font-variant-numeric: tabular-nums; }
.nd-tel__note { font-size: var(--nd-fs-xs); color: var(--nd-steel); letter-spacing: 0.06em; }

/* ---------- header ---------- */
.nd-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  padding-top: env(safe-area-inset-top, 0px);
  transition: background-color 0.4s var(--nd-ease), box-shadow 0.4s var(--nd-ease), transform 0.5s var(--nd-ease);
}
.nd-header.is-solid { background: color-mix(in srgb, var(--nd-zinc) 88%, transparent); backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2); box-shadow: 0 1px 0 var(--nd-line); }
.nd-header.is-hidden { transform: translateY(-100%); }
.nd-header__inner { height: var(--nd-header-h); display: flex; align-items: center; gap: 28px; }
.nd-logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--nd-ink); flex: none; }
.nd-logo__mark { width: auto; height: 34px; aspect-ratio: 264 / 280; flex: none; }
.nd-logo__text { display: grid; line-height: 1.1; }
.nd-logo__name { font-family: var(--nd-body); font-weight: 700; font-size: 1.2rem; letter-spacing: 0.14em; }
.nd-logo__sub { font-family: var(--nd-mono); font-size: 0.6rem; letter-spacing: 0.16em; color: var(--nd-steel); }
.nd-nav { margin-left: auto; }
.nd-nav__list { display: flex; gap: clamp(14px, 1.8vw, 30px); }
.nd-nav__link { white-space: nowrap; position: relative; font-size: var(--nd-fs-sm); font-weight: 500; text-decoration: none; letter-spacing: 0.05em; padding-block: 6px; }
.nd-nav__link::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--nd-ember); transform: scaleX(0); transform-origin: 0 50%; transition: transform 0.4s var(--nd-ease); }
.nd-nav__link:hover::after, .nd-nav__link.is-current::after { transform: scaleX(1); }
.nd-header__cta { display: flex; align-items: center; gap: 20px; }
.nd-header__cta .nd-btn { min-height: 46px; padding: 0 20px; font-size: var(--nd-fs-sm); }
.nd-header__cta .nd-tel__num { font-size: 1.2rem; }
.nd-menu-btn { display: none; }

@media (max-width: 1600px) { .nd-header__cta .nd-tel { display: none; } }
@media (max-width: 1200px) {
  .nd-nav { display: none; }
  .nd-header__cta { margin-left: auto; }
  .nd-menu-btn {
    display: inline-grid; place-items: center; width: 46px; height: 46px; border: 0; padding: 0;
    background: var(--nd-ink); color: var(--nd-paper); cursor: pointer;
  }
  .nd-menu-btn span { display: block; width: 18px; height: 2px; background: currentColor; position: relative; transition: transform 0.3s var(--nd-ease); }
  .nd-menu-btn span::before, .nd-menu-btn span::after { content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: currentColor; transition: transform 0.3s var(--nd-ease), top 0.3s var(--nd-ease); }
  .nd-menu-btn span::before { top: -6px; } .nd-menu-btn span::after { top: 6px; }
  .nd-menu-open .nd-menu-btn span { background: transparent; }
  .nd-menu-open .nd-menu-btn span::before { top: 0; transform: rotate(45deg); }
  .nd-menu-open .nd-menu-btn span::after { top: 0; transform: rotate(-45deg); }
}
@media (max-width: 560px) { .nd-header__cta .nd-btn { display: none; } }

/* drawer */
.nd-drawer {
  position: fixed; inset: 0; z-index: 45; background: var(--nd-soot); color: #eef1f0;
  padding: calc(var(--nd-header-h) + 32px + env(safe-area-inset-top, 0px)) var(--nd-gutter) 40px;
  display: flex; flex-direction: column; gap: 32px;
  clip-path: inset(0 0 100% 0); visibility: hidden;
  transition: clip-path 0.6s var(--nd-ease), visibility 0s linear 0.6s;
}
.nd-menu-open .nd-drawer { clip-path: inset(0 0 0 0); visibility: visible; transition: clip-path 0.6s var(--nd-ease), visibility 0s; }
.nd-menu-open .nd-header { background: transparent; box-shadow: none; backdrop-filter: none; }
.nd-menu-open .nd-header .nd-logo { color: #eef1f0; }
.nd-drawer { overflow-y: auto; overscroll-behavior: contain; }
.nd-drawer__k { display: block; font-family: var(--nd-mono); font-size: 0.65rem; letter-spacing: 0.14em; color: var(--nd-ash); margin-bottom: 10px; }
.nd-drawer__services ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.nd-drawer__services a { display: flex; align-items: center; min-height: 56px; height: 100%; padding: 10px 12px; border: 1px solid var(--nd-soot-line); background: rgba(255, 255, 255, 0.04); font-weight: 700; font-size: 0.9rem; line-height: 1.4; text-decoration: none; }
.nd-drawer__services a[aria-current="page"] { border-color: var(--nd-ember); color: var(--nd-ember); }
.nd-drawer__list { display: grid; gap: 4px; }
.nd-drawer__list a { display: flex; justify-content: space-between; align-items: baseline; font-family: var(--nd-display); font-size: clamp(1.6rem, 7vw, 2.4rem); text-decoration: none; padding-block: 10px; border-bottom: 1px solid var(--nd-soot-line); }
.nd-drawer__list small { font-family: var(--nd-mono); font-size: 0.65rem; color: var(--nd-ash); letter-spacing: 0.14em; }
.nd-drawer .nd-tel__note { color: var(--nd-ash); }
.nd-drawer .nd-tel__num { font-size: 2rem; }

/* ---------- hero ---------- */
.nd-hero { position: relative; padding-top: calc(var(--nd-header-h) + clamp(24px, 4vw, 56px)); padding-bottom: clamp(40px, 5vw, 72px); overflow: hidden; }
.nd-hero::before { /* seam lines of a steel panel */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(90deg, transparent calc(100% - 1px), color-mix(in srgb, var(--nd-line) 55%, transparent) 0);
  background-size: calc(100% / 6) 100%;
  mask-image: linear-gradient(180deg, #000 30%, transparent);
  -webkit-mask-image: linear-gradient(180deg, #000 30%, transparent);
}
.nd-hero__grid { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr); gap: clamp(28px, 4vw, 72px); align-items: stretch; }
.nd-hero__copy { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: clamp(20px, 3vw, 48px); align-items: end; }
.nd-hero__title {
  writing-mode: vertical-rl; text-orientation: upright;
  font-family: var(--nd-display); font-weight: 400;
  font-size: clamp(2.6rem, 1.2rem + 4.4vw, 5.6rem);
  line-height: 1.12; letter-spacing: 0.04em;
  height: 7.4em; /* seven characters per column */
  display: flex; flex-direction: column; flex-wrap: wrap; align-content: flex-start;
  grid-row: 1 / span 2;
}
.nd-hero__line { display: block; }
.nd-hero__line + .nd-hero__line { margin-right: 0.08em; }
.nd-hero__line--fire { color: var(--nd-ember); }
.nd-hero__title .nd-ch { display: inline-block; animation: nd-rise 0.7s var(--nd-ease) both; animation-delay: calc(var(--i) * 24ms + 80ms); }
@keyframes nd-rise { from { transform: translateY(-0.5em); opacity: 0; filter: blur(6px); } to { transform: none; opacity: 1; filter: none; } }
.nd-hero__aside { display: grid; gap: 28px; align-content: end; padding-bottom: 6px; }
.nd-hero__eyebrow { display: grid; gap: 10px; }
.nd-hero__kicker { font-weight: 700; font-size: var(--nd-fs-lg); line-height: 1.6; letter-spacing: 0.04em; }
.nd-hero__lead { font-size: var(--nd-fs-md); line-height: 2; color: var(--nd-ink); max-width: 26em; }
.nd-hero__actions { display: flex; flex-wrap: wrap; gap: 18px 26px; align-items: center; }

/* the duct window */
.nd-duct { position: relative; display: grid; grid-template-rows: auto minmax(0, 1fr) auto; background: var(--nd-soot); color: #eef1f0; min-height: clamp(420px, 44vw, 640px); }
.nd-duct__bar { display: flex; justify-content: space-between; gap: 16px; padding: 14px 18px; font-family: var(--nd-mono); font-size: 0.65rem; letter-spacing: 0.12em; color: var(--nd-ash); border-bottom: 1px solid var(--nd-soot-line); }
.nd-duct__bar b { color: #eef1f0; font-weight: 500; }
.nd-duct__stage { position: relative; min-height: 300px; cursor: crosshair; touch-action: pan-y; }
.nd-duct__canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; opacity: 0; transition: opacity 0.6s var(--nd-ease); }
.nd-duct__stage.is-ready .nd-duct__canvas { opacity: 1; }
.nd-duct__hint {
  position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%);
  font-size: var(--nd-fs-xs); letter-spacing: 0.1em; padding: 7px 14px; white-space: nowrap;
  background: color-mix(in srgb, var(--nd-soot) 70%, transparent); border: 1px solid var(--nd-soot-line);
  pointer-events: none; transition: opacity 0.5s;
}
.nd-duct.is-touched .nd-duct__hint { opacity: 0; }
.nd-duct__meters { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--nd-soot-line); }
.nd-meter { padding: 16px 18px 18px; display: grid; gap: 8px; }
.nd-meter + .nd-meter { border-left: 1px solid var(--nd-soot-line); }
.nd-meter__head { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.nd-meter__name { font-size: var(--nd-fs-xs); color: var(--nd-ash); letter-spacing: 0.08em; }
.nd-meter__val { font-family: var(--nd-mono); font-size: 1.15rem; font-variant-numeric: tabular-nums; }
.nd-meter__track { height: 4px; background: var(--nd-soot-line); position: relative; overflow: hidden; }
.nd-meter__fill { position: absolute; inset: 0; transform-origin: 0 50%; transform: scaleX(var(--v, 0.7)); background: var(--nd-ember); transition: transform 0.4s var(--nd-ease), background-color 0.4s; }
.nd-meter--flow .nd-meter__fill { background: var(--nd-clean); }
/* flange bolts at the corners of the window */
.nd-duct::before, .nd-duct::after { content: ""; position: absolute; width: 7px; height: 7px; border-radius: 50%; background: var(--nd-line); top: -14px; box-shadow: 0 0 0 2px var(--nd-zinc); }
.nd-duct::before { left: -14px; } .nd-duct::after { right: -14px; }
.nd-duct__bolts { position: absolute; inset: 0; pointer-events: none; }
.nd-duct__bolts::before, .nd-duct__bolts::after { content: ""; position: absolute; width: 7px; height: 7px; border-radius: 50%; background: var(--nd-line); bottom: -14px; }
.nd-duct__bolts::before { left: -14px; } .nd-duct__bolts::after { right: -14px; }

@media (max-width: 960px) {
  .nd-hero__grid { grid-template-columns: minmax(0, 1fr); }
  .nd-hero__title { font-size: clamp(2.3rem, 9.6vw, 3.6rem); }
  .nd-duct { min-height: 460px; margin-inline: 14px; }
}
@media (max-width: 520px) {
  .nd-hero__copy { grid-template-columns: minmax(0, 1fr) auto; row-gap: 24px; align-items: end; }
  .nd-hero__aside { display: contents; }
  .nd-hero__title { grid-column: 2; grid-row: 1; }
  .nd-hero__eyebrow { grid-column: 1; grid-row: 1; align-self: end; padding-bottom: 4px; }
  .nd-hero__lead, .nd-hero__actions { grid-column: 1 / -1; }
  .nd-duct { margin-inline: 0; }
  .nd-duct::before, .nd-duct::after, .nd-duct__bolts { display: none; }
}

/* ---------- stats ---------- */
.nd-stats { border-block: 1px solid var(--nd-line); background: var(--nd-zinc); }
.nd-stats__grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.nd-stat { padding: clamp(24px, 3vw, 40px) clamp(14px, 2vw, 28px); display: grid; gap: 10px; align-content: start; }
.nd-stat + .nd-stat { border-left: 1px solid var(--nd-line); }
.nd-stat__num { font-family: var(--nd-display); font-size: clamp(2rem, 1.2rem + 2.6vw, 3.6rem); line-height: 1; letter-spacing: 0.01em; display: flex; align-items: baseline; gap: 0.12em; font-variant-numeric: tabular-nums; }
.nd-stat__num small { font-family: var(--nd-body); font-weight: 700; font-size: 0.34em; letter-spacing: 0.04em; }
.nd-stat__num--fire { color: var(--nd-ember-ink); }
.nd-stat__text { font-size: var(--nd-fs-sm); color: var(--nd-ink); line-height: 1.7; }
@media (max-width: 860px) {
  .nd-stats__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nd-stat:nth-child(3) { border-left: 0; }
  .nd-stat:nth-child(n+3) { border-top: 1px solid var(--nd-line); }
}

/* ---------- self check ---------- */
.nd-check__grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 88px); align-items: start; }
.nd-check__list { display: grid; border-top: 1px solid var(--nd-ink); }
.nd-check__item { position: relative; display: grid; grid-template-columns: 56px minmax(0, 1fr) auto; align-items: center; gap: 16px; padding: 22px 4px; border-bottom: 1px solid var(--nd-line); cursor: pointer; transition: background-color 0.3s; }
.nd-check__item:hover { background: var(--nd-zinc-2); }
.nd-check__item input { position: absolute; opacity: 0; pointer-events: none; }
.nd-check__box { width: 30px; height: 30px; border: 1.5px solid var(--nd-ink); display: grid; place-items: center; margin-left: 10px; transition: background-color 0.25s, border-color 0.25s; }
.nd-check__box svg { width: 18px; height: 18px; stroke: var(--nd-paper); stroke-dasharray: 24; stroke-dashoffset: 24; transition: stroke-dashoffset 0.35s var(--nd-ease); }
.nd-check__item input:checked + .nd-check__box { background: var(--nd-ember); border-color: var(--nd-ember); }
.nd-check__item input:checked + .nd-check__box svg { stroke-dashoffset: 0; stroke: var(--nd-ink); }
.nd-check__item input:focus-visible + .nd-check__box { outline: 2px solid var(--nd-ember); outline-offset: 3px; }
.nd-check__text { font-size: var(--nd-fs-lg); font-weight: 700; line-height: 1.55; }
.nd-check__text small { display: block; font-weight: 400; font-size: var(--nd-fs-sm); color: var(--nd-steel); margin-top: 4px; }
.nd-check__tag { font-family: var(--nd-mono); font-size: 0.62rem; letter-spacing: 0.12em; color: var(--nd-steel); }
.nd-gauge { position: sticky; top: calc(var(--nd-header-h) + 24px); background: var(--nd-soot); color: #eef1f0; padding: clamp(24px, 3vw, 40px); display: grid; gap: 22px; }
.nd-gauge__dial { position: relative; width: 100%; max-width: 320px; margin-inline: auto; }
.nd-gauge__dial svg { width: 100%; height: auto; aspect-ratio: 320 / 180; display: block; overflow: visible; }
.nd-gauge__arc-bg { fill: none; stroke: var(--nd-soot-line); stroke-width: 14; }
.nd-gauge__arc { fill: none; stroke: var(--nd-ember); stroke-width: 14; transition: stroke-dashoffset 0.8s var(--nd-ease), stroke 0.4s; }
.nd-gauge__needle { transform-origin: 160px 160px; transition: transform 0.9s cubic-bezier(0.3, 1.5, 0.5, 1); }
.nd-gauge__ticks text { font-family: var(--nd-mono); font-size: 10px; fill: var(--nd-ash); }
.nd-gauge__read { text-align: center; margin-top: 6px; font-family: var(--nd-display); font-size: 2.6rem; line-height: 1; font-variant-numeric: tabular-nums; }
.nd-gauge__read small { font-family: var(--nd-body); font-size: 0.9rem; font-weight: 700; margin-left: 2px; }
.nd-gauge__level { font-family: var(--nd-display); font-size: var(--nd-fs-xl); line-height: 1.3; }
.nd-gauge__msg { font-size: var(--nd-fs-sm); color: #cfd6d5; line-height: 1.9; min-height: 3.8em; }
.nd-gauge .nd-btn { width: 100%; }
@media (max-width: 900px) { .nd-check__grid { grid-template-columns: minmax(0, 1fr); } .nd-gauge { position: relative; top: 0; } }
@media (max-width: 520px) { .nd-check__item { grid-template-columns: 44px minmax(0, 1fr); } .nd-check__box { margin-left: 4px; } .nd-check__tag { display: none; } }

/* ---------- exhaust path (services) ---------- */
.nd-path { background: var(--nd-paper); }
.nd-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.nd-tab { appearance: none; border: 1px solid var(--nd-ink); background: transparent; color: var(--nd-ink); font: 700 var(--nd-fs-sm)/1 var(--nd-body); letter-spacing: 0.05em; padding: 14px 20px; cursor: pointer; transition: background-color 0.3s, color 0.3s; }
.nd-tab small { font-weight: 400; margin-left: 6px; color: inherit; opacity: 0.7; }
.nd-tab[aria-selected="true"] { background: var(--nd-ink); color: var(--nd-paper); }
.nd-tab:hover:not([aria-selected="true"]) { background: var(--nd-zinc-2); }
.nd-path__grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 64px); align-items: start; }
.nd-diagram { position: relative; background: var(--nd-zinc); border: 1px solid var(--nd-line); padding: clamp(10px, 2vw, 24px); }
.nd-diagram svg { width: 100%; height: auto; display: block; }
.nd-diagram__cap { display: flex; justify-content: space-between; gap: 12px; font-family: var(--nd-mono); font-size: 0.62rem; letter-spacing: 0.12em; color: var(--nd-steel); margin-top: 10px; }
.nd-scene { display: none; }
.nd-scene.is-active { display: block; }
.nd-svg-line { fill: none; stroke: var(--nd-ink); stroke-width: 1.4; }
.nd-svg-thin { fill: none; stroke: var(--nd-steel); stroke-width: 1; }
.nd-svg-hatch { fill: url(#nd-hatch); }
.nd-svg-fill { fill: var(--nd-paper); stroke: var(--nd-ink); stroke-width: 1.4; }
.nd-svg-glass { fill: color-mix(in srgb, var(--nd-paper) 60%, transparent); stroke: var(--nd-ink); stroke-width: 1.4; }
.nd-svg-duct { fill: none; stroke: var(--nd-ink); stroke-width: 22; stroke-linejoin: miter; }
.nd-svg-duct-in { fill: none; stroke: var(--nd-paper); stroke-width: 19; stroke-linejoin: miter; }
.nd-svg-flow { fill: none; stroke: var(--nd-ember); stroke-width: 3; stroke-dasharray: 2 16; stroke-linecap: round; animation: nd-flow 1.1s linear infinite; }
@keyframes nd-flow { to { stroke-dashoffset: -18; } }
.nd-svg-label { font-family: var(--nd-body); font-size: 12px; fill: var(--nd-steel); letter-spacing: 0.06em; }
.nd-svg-smoke { fill: var(--nd-line); opacity: 0.8; }
.nd-svg-coal { fill: var(--nd-ember); }
.nd-hot { cursor: pointer; }
.nd-hot circle { fill: var(--nd-ink); stroke: var(--nd-paper); stroke-width: 3; transition: fill 0.3s, r 0.3s; }
.nd-hot text { font-family: var(--nd-mono); font-size: 12px; font-weight: 500; fill: var(--nd-paper); text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.nd-hot .nd-hot__ring { fill: none; stroke: var(--nd-ember); stroke-width: 2; opacity: 0; transform-box: fill-box; transform-origin: center; }
.nd-hot.is-active circle:not(.nd-hot__ring) { fill: var(--nd-ember); }
.nd-hot.is-active text { fill: var(--nd-ink); }
.nd-hot.is-active .nd-hot__ring { animation: nd-ping 1.6s var(--nd-ease) infinite; }
@keyframes nd-ping { 0% { opacity: 0.9; transform: scale(1); } 100% { opacity: 0; transform: scale(2.1); } }
.nd-points { counter-reset: none; display: grid; border-top: 1px solid var(--nd-ink); }
.nd-point { border-bottom: 1px solid var(--nd-line); }
.nd-point__btn { appearance: none; width: 100%; display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 14px; align-items: baseline; text-align: left; background: none; border: 0; padding: 18px 0; cursor: pointer; color: var(--nd-ink); font: inherit; }
.nd-point__no { font-family: var(--nd-mono); font-size: var(--nd-fs-xs); color: var(--nd-steel); letter-spacing: 0.1em; }
.nd-point__name { font-weight: 700; font-size: var(--nd-fs-lg); line-height: 1.5; transition: color 0.3s; }
.nd-point__body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.45s var(--nd-ease); }
.nd-point__body > p { overflow: hidden; padding-left: 54px; font-size: var(--nd-fs-sm); line-height: 1.95; color: var(--nd-ink); }
.nd-point.is-active .nd-point__body { grid-template-rows: 1fr; }
.nd-point.is-active .nd-point__body > p { padding-bottom: 20px; }
.nd-point.is-active .nd-point__name { color: var(--nd-ember-ink); }
.nd-point.is-active .nd-point__no { color: var(--nd-ember-ink); }
.nd-points-wrap { display: none; }
.nd-points-wrap.is-active { display: block; }
@media (max-width: 960px) { .nd-path__grid { grid-template-columns: minmax(0, 1fr); } }

/* service cards */
.nd-services { margin-top: clamp(64px, 9vw, 120px); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--nd-ink); }
.nd-service { position: relative; display: grid; grid-template-rows: auto auto 1fr auto; gap: 14px; padding: 28px clamp(16px, 1.6vw, 26px) 30px 0; }
.nd-service + .nd-service { padding-left: clamp(16px, 1.6vw, 26px); border-left: 1px solid var(--nd-line); }
.nd-service__for { font-family: var(--nd-mono); font-size: 0.62rem; letter-spacing: 0.14em; color: var(--nd-steel); }
.nd-service__title { font-family: var(--nd-display); font-weight: 400; font-size: clamp(1.25rem, 1rem + 0.7vw, 1.6rem); line-height: 1.35; }
.nd-service__text { font-size: var(--nd-fs-sm); line-height: 1.95; }
.nd-service__spec { display: grid; gap: 6px; padding-top: 14px; border-top: 1px dashed var(--nd-line); }
.nd-service__spec li { font-size: var(--nd-fs-xs); line-height: 1.6; display: flex; gap: 8px; }
.nd-service__spec li::before { content: ""; flex: none; width: 6px; height: 6px; margin-top: 0.5em; background: var(--nd-ember); }
@media (max-width: 1080px) {
  .nd-services { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nd-service:nth-child(3) { border-left: 0; padding-left: 0; }
  .nd-service:nth-child(n+3) { border-top: 1px solid var(--nd-line); }
}
@media (max-width: 600px) {
  .nd-services { grid-template-columns: minmax(0, 1fr); }
  .nd-service, .nd-service + .nd-service { padding-left: 0; padding-right: 0; border-left: 0; }
  .nd-service + .nd-service { border-top: 1px solid var(--nd-line); }
}

/* ---------- fire cost (dark) ---------- */
.nd-fire { overflow: hidden; }
.nd-fire__glow { position: absolute; inset: auto -10% -40% -10%; height: 80%; background: radial-gradient(60% 60% at 50% 100%, color-mix(in srgb, var(--nd-ember) 32%, transparent), transparent 70%); pointer-events: none; }
.nd-fire__top { display: grid; gap: clamp(36px, 5vw, 72px); margin-bottom: clamp(48px, 7vw, 96px); }
.nd-fire__amount { display: grid; gap: 12px; }
.nd-fire__yen { font-family: var(--nd-display); font-size: clamp(2.3rem, 11.4vw, 11.5rem); line-height: 0.9; letter-spacing: -0.01em; color: var(--nd-ember); font-variant-numeric: tabular-nums; white-space: nowrap; }
.nd-fire__yen small { font-size: 0.32em; color: #eef1f0; margin-left: 0.15em; letter-spacing: 0.02em; }
.nd-fire__who { font-size: var(--nd-fs-sm); color: var(--nd-ash); display: flex; gap: 12px; align-items: center; }
.nd-fire__who::before { content: ""; width: 40px; height: 1px; background: var(--nd-ember); }
.nd-cases { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--nd-soot-line); border: 1px solid var(--nd-soot-line); }
.nd-case { background: var(--nd-soot); padding: clamp(22px, 2.6vw, 36px); display: grid; gap: 14px; align-content: start; }
.nd-case__no { font-family: var(--nd-mono); font-size: 0.65rem; letter-spacing: 0.14em; color: var(--nd-ember); }
.nd-case__title { font-weight: 700; font-size: var(--nd-fs-lg); line-height: 1.5; }
.nd-case__text { font-size: var(--nd-fs-sm); color: #cfd6d5; line-height: 1.95; }
.nd-cost { margin-top: clamp(40px, 6vw, 72px); display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 64px); align-items: stretch; }
.nd-cost__table-wrap { overflow-x: auto; }
.nd-cost__table-wrap table { width: 100%; border-collapse: collapse; font-size: var(--nd-fs-sm); min-width: 460px; }
.nd-cost__table-wrap caption { text-align: left; font-family: var(--nd-mono); font-size: 0.65rem; letter-spacing: 0.14em; color: var(--nd-ash); padding-bottom: 14px; }
.nd-cost__table-wrap th, .nd-cost__table-wrap td { text-align: left; padding: 15px 12px 15px 0; border-bottom: 1px solid var(--nd-soot-line); vertical-align: baseline; }
.nd-cost__table-wrap thead th { font-weight: 400; font-size: var(--nd-fs-xs); color: var(--nd-ash); letter-spacing: 0.08em; }
.nd-cost__table-wrap tbody th { font-weight: 500; }
.nd-cost__table-wrap td { font-family: var(--nd-mono); font-size: 0.8rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.nd-cost__table-wrap td.nd-cost__yen { color: var(--nd-ember); }
.nd-zero { border: 1px solid var(--nd-ember); padding: clamp(24px, 3vw, 40px); display: grid; gap: 14px; align-content: center; background: color-mix(in srgb, var(--nd-ember) 7%, var(--nd-soot)); }
.nd-zero__k { font-size: var(--nd-fs-sm); color: #eef1f0; font-weight: 700; letter-spacing: 0.06em; }
.nd-zero__v { font-family: var(--nd-display); font-size: clamp(3.6rem, 2rem + 5vw, 6.4rem); line-height: 1; color: #eef1f0; }
.nd-zero__v small { font-size: 0.32em; margin-left: 0.1em; }
.nd-zero__t { font-size: var(--nd-fs-sm); color: #cfd6d5; line-height: 1.9; }
.nd-zero .nd-btn { justify-self: start; }
@media (max-width: 560px) { .nd-cost__table-wrap table { min-width: 0; } .nd-cost__table-wrap td { white-space: normal; } .nd-cost__table-wrap thead th:last-child, .nd-cost__table-wrap td:last-child { width: 5.5em; } }
@media (max-width: 900px) { .nd-cost { grid-template-columns: minmax(0, 1fr); } .nd-cases { grid-template-columns: minmax(0, 1fr); } }

/* ---------- reasons ---------- */
.nd-reasons__head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 80px); align-items: end; margin-bottom: clamp(48px, 7vw, 96px); }
.nd-reasons__title { font-family: var(--nd-display); font-weight: 400; font-size: clamp(2.3rem, 1.1rem + 3.7vw, 5rem); line-height: 1.16; letter-spacing: 0.02em; }
.nd-reasons__title > span { display: block; white-space: nowrap; }
.nd-marker { display: inline; }
.nd-reasons__list { display: grid; border-top: 1px solid var(--nd-ink); }
.nd-reason { display: grid; grid-template-columns: minmax(120px, 0.6fr) minmax(0, 1fr) minmax(0, 1.25fr); gap: clamp(16px, 3vw, 48px); padding-block: clamp(28px, 3.6vw, 48px); border-bottom: 1px solid var(--nd-line); align-items: start; }
.nd-reason__key { font-family: var(--nd-display); font-size: clamp(2.6rem, 1.6rem + 3vw, 4.6rem); line-height: 1; letter-spacing: 0.02em; color: var(--nd-ink); }
.nd-reason__title { font-weight: 700; font-size: var(--nd-fs-xl); line-height: 1.45; text-wrap: balance; }
.nd-reason__text { font-size: var(--nd-fs-md); line-height: 2; }
.nd-reason__text p + p, .nd-reason__text p + ul { margin-top: 14px; }
.nd-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.nd-chip { font-family: var(--nd-mono); font-size: 0.68rem; letter-spacing: 0.06em; padding: 7px 12px; border: 1px solid var(--nd-ink); line-height: 1.3; display: inline-flex; gap: 8px; align-items: center; }
.nd-chip b { font-family: var(--nd-body); font-size: 0.8rem; }
.nd-badge { display: inline-flex; gap: 10px; align-items: center; margin-top: 16px; padding: 10px 14px; background: var(--nd-paper); border: 1px solid var(--nd-line); font-size: var(--nd-fs-xs); line-height: 1.5; }
.nd-badge strong { font-family: var(--nd-mono); font-size: 0.75rem; letter-spacing: 0.08em; }
@media (max-width: 900px) {
  .nd-reasons__head { grid-template-columns: minmax(0, 1fr); }
  .nd-reason { grid-template-columns: minmax(0, 1fr); gap: 12px; }
}

/* ---------- flow ---------- */
.nd-flow { background: var(--nd-zinc-2); }
.nd-steps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); position: relative; }
.nd-steps::before { content: ""; position: absolute; left: 0; right: 0; top: 23px; height: 2px; background: var(--nd-line); z-index: 0; }
.nd-steps::after { content: ""; position: absolute; left: 0; top: 23px; height: 2px; width: 100%; z-index: 0; background: var(--nd-ember); transform-origin: 0 50%; transform: scaleX(var(--p, 1)); }
.nd-step { position: relative; z-index: 1; display: grid; gap: 14px; padding-right: clamp(12px, 2vw, 28px); align-content: start; }
.nd-step__no { width: 48px; height: 48px; display: grid; place-items: center; background: var(--nd-ink); color: var(--nd-paper); font-family: var(--nd-mono); font-size: 0.85rem; position: relative; }
.nd-step__title { font-weight: 700; font-size: var(--nd-fs-lg); line-height: 1.5; margin-top: 8px; }
.nd-step__text { font-size: var(--nd-fs-sm); line-height: 1.9; }
.nd-step__note { font-family: var(--nd-mono); font-size: 0.62rem; letter-spacing: 0.1em; color: var(--nd-ember-ink); }
.nd-flow__notes { margin-top: clamp(40px, 6vw, 72px); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--nd-line); border: 1px solid var(--nd-line); }
.nd-flow__note { background: var(--nd-paper); padding: 22px 24px; display: grid; gap: 6px; }
.nd-flow__note strong { font-family: var(--nd-display); font-weight: 400; font-size: var(--nd-fs-xl); line-height: 1.2; }
.nd-flow__note span { font-size: var(--nd-fs-sm); }
@media (max-width: 960px) {
  .nd-steps { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .nd-steps::before, .nd-steps::after { left: 23px; right: auto; top: 0; bottom: 0; width: 2px; height: auto; }
  .nd-steps::after { transform-origin: 50% 0; transform: scaleY(var(--p, 1)); }
  .nd-step { grid-template-columns: 48px minmax(0, 1fr); column-gap: 20px; row-gap: 6px; padding-right: 0; }
  .nd-step__no { grid-row: 1 / span 4; }
  .nd-step__title { margin-top: 0; }
  .nd-flow__notes { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- faq ---------- */
.nd-faq__grid { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.4fr); gap: clamp(28px, 5vw, 88px); align-items: start; }
.nd-faq__list { border-top: 1px solid var(--nd-ink); }
.nd-qa { border-bottom: 1px solid var(--nd-line); }
.nd-qa summary { list-style: none; display: grid; grid-template-columns: 34px minmax(0, 1fr) 24px; gap: 12px; align-items: baseline; padding: 22px 0; cursor: pointer; font-weight: 700; font-size: var(--nd-fs-lg); line-height: 1.55; }
.nd-qa summary::-webkit-details-marker { display: none; }
.nd-qa__q { font-family: var(--nd-display); font-weight: 400; color: var(--nd-ember-ink); font-size: 1.2rem; }
.nd-qa__icon { position: relative; width: 16px; height: 16px; align-self: center; }
.nd-qa__icon::before, .nd-qa__icon::after { content: ""; position: absolute; left: 0; top: 7px; width: 16px; height: 2px; background: var(--nd-ink); transition: transform 0.35s var(--nd-ease); }
.nd-qa__icon::after { transform: rotate(90deg); }
.nd-qa[open] .nd-qa__icon::after { transform: rotate(0); }
.nd-qa__a { padding: 0 40px 24px 46px; font-size: var(--nd-fs-md); line-height: 2; }
@media (max-width: 900px) { .nd-faq__grid { grid-template-columns: minmax(0, 1fr); } }

/* ---------- company ---------- */
.nd-company { background: var(--nd-paper); }
.nd-company__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 88px); align-items: start; }
.nd-dl { display: grid; border-top: 1px solid var(--nd-ink); }
.nd-dl > div { display: grid; grid-template-columns: 8em minmax(0, 1fr); gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--nd-line); }
.nd-dl dt { font-size: var(--nd-fs-sm); color: var(--nd-steel); }
.nd-dl dd { margin: 0; font-size: var(--nd-fs-md); line-height: 1.8; }
.nd-offices { display: grid; gap: 16px; }
.nd-office { display: grid; gap: 8px; padding: 24px; background: var(--nd-zinc); border: 1px solid var(--nd-line); }
.nd-office__k { font-family: var(--nd-mono); font-size: 0.62rem; letter-spacing: 0.14em; color: var(--nd-steel); }
.nd-office__name { font-weight: 700; font-size: var(--nd-fs-lg); }
.nd-office__addr { font-size: var(--nd-fs-sm); }
.nd-area { display: grid; gap: 14px; padding: 24px; background: var(--nd-soot); color: #eef1f0; }
.nd-area__regions { display: flex; flex-wrap: wrap; gap: 8px; }
.nd-area__regions span { font-weight: 700; letter-spacing: 0.08em; font-size: var(--nd-fs-xl); line-height: 1.2; padding-right: 14px; }
.nd-area__regions span + span { padding-left: 14px; border-left: 1px solid var(--nd-soot-line); }
.nd-area p { font-size: var(--nd-fs-sm); color: #cfd6d5; }
@media (max-width: 900px) { .nd-company__grid { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 480px) { .nd-dl > div { grid-template-columns: minmax(0, 1fr); gap: 2px; } }

/* ---------- contact ---------- */
.nd-contact { background: var(--nd-ember); color: var(--nd-ink); }
.nd-contact__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(28px, 5vw, 88px); align-items: start; }
.nd-contact .nd-label { color: var(--nd-ink); }
.nd-contact__title { font-family: var(--nd-display); font-weight: 400; font-size: clamp(2.3rem, 1.1rem + 3.4vw, 4.6rem); line-height: 1.16; }
.nd-contact__tel { display: grid; gap: 4px; margin-top: 36px; text-decoration: none; }
.nd-contact__tel-k { font-size: var(--nd-fs-sm); font-weight: 700; letter-spacing: 0.06em; }
.nd-contact__tel-num { font-family: var(--nd-display); font-size: clamp(1.9rem, 0.9rem + 2.7vw, 3.5rem); line-height: 1.05; font-variant-numeric: tabular-nums; letter-spacing: 0.01em; white-space: nowrap; }
.nd-contact__tel-note { font-size: var(--nd-fs-sm); }
.nd-contact__sub { margin-top: 18px; font-size: var(--nd-fs-sm); line-height: 1.9; max-width: 28em; }
.nd-form { background: var(--nd-paper); padding: clamp(22px, 3vw, 44px); display: grid; gap: 20px; }
.nd-form__row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
.nd-field { display: grid; gap: 8px; min-width: 0; }
.nd-field > span, .nd-field legend { font-size: var(--nd-fs-sm); font-weight: 700; letter-spacing: 0.04em; padding: 0; }
.nd-field em { font-style: normal; font-family: var(--nd-mono); font-size: 0.6rem; letter-spacing: 0.1em; color: var(--nd-ember-ink); margin-left: 8px; }
.nd-field input[type="text"], .nd-field input[type="tel"], .nd-field input[type="email"], .nd-field select, .nd-field textarea {
  width: 100%; font: inherit; font-size: 1rem; color: var(--nd-ink); background: var(--nd-zinc); border: 0; border-bottom: 2px solid var(--nd-line); border-radius: 0; padding: 14px 14px; transition: border-color 0.3s, background-color 0.3s;
}
.nd-field textarea { min-height: 120px; resize: vertical; }
.nd-field input:focus, .nd-field select:focus, .nd-field textarea:focus { outline: none; border-bottom-color: var(--nd-ember); background: #fff; }
.nd-field fieldset, fieldset.nd-field { border: 0; margin: 0; padding: 0; }
.nd-opts { display: flex; flex-wrap: wrap; gap: 8px; }
.nd-opt { position: relative; }
.nd-opt input { position: absolute; opacity: 0; }
.nd-opt span { display: inline-block; padding: 9px 14px; border: 1px solid var(--nd-line); font-size: var(--nd-fs-sm); cursor: pointer; transition: background-color 0.25s, border-color 0.25s; }
.nd-opt input:checked + span { background: var(--nd-ink); color: var(--nd-paper); border-color: var(--nd-ink); }
.nd-opt input:focus-visible + span { outline: 2px solid var(--nd-ember); outline-offset: 2px; }
.nd-form__foot { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; }
.nd-form__foot small { font-size: var(--nd-fs-xs); color: var(--nd-steel); max-width: 26em; line-height: 1.7; }
.nd-form__done { font-size: var(--nd-fs-sm); font-weight: 700; padding: 14px 16px; background: var(--nd-zinc); border-left: 3px solid var(--nd-clean); }
@media (max-width: 960px) { .nd-contact__grid { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 560px) { .nd-form__row { grid-template-columns: minmax(0, 1fr); } }

/* ---------- footer ---------- */
.nd-footer { background: var(--nd-soot); color: #eef1f0; padding-block: clamp(56px, 7vw, 96px) calc(32px + env(safe-area-inset-bottom, 0px)); }
.nd-footer__grid { display: grid; grid-template-columns: minmax(0, 1.2fr) repeat(3, minmax(0, 1fr)); gap: clamp(24px, 4vw, 56px); }
.nd-footer .nd-logo { color: #eef1f0; }
.nd-footer .nd-logo__sub { color: var(--nd-ash); }
.nd-footer__addr { margin-top: 20px; font-size: var(--nd-fs-sm); color: #cfd6d5; line-height: 1.9; }
.nd-footer h3 { font-family: var(--nd-mono); font-weight: 400; font-size: 0.65rem; letter-spacing: 0.16em; color: var(--nd-ash); margin-bottom: 14px; }
.nd-footer li a { display: inline-block; padding-block: 5px; font-size: var(--nd-fs-sm); text-decoration: none; }
.nd-footer li a:hover { color: var(--nd-ember); }
.nd-footer__base { margin-top: clamp(40px, 6vw, 72px); padding-top: 22px; border-top: 1px solid var(--nd-soot-line); display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; font-family: var(--nd-mono); font-size: 0.62rem; letter-spacing: 0.1em; color: var(--nd-ash); }
.nd-footer__word { font-family: var(--nd-display); font-size: min(5.6vw, 5.4rem); line-height: 0.9; letter-spacing: 0.02em; color: var(--nd-soot-2); margin-top: clamp(32px, 5vw, 64px); white-space: nowrap; overflow: hidden; user-select: none; }
@media (max-width: 900px) { .nd-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .nd-footer__brand { grid-column: 1 / -1; } }

/* ---------- mobile action bar ---------- */
.nd-mbar { display: none; }
@media (max-width: 760px) {
  .nd-mbar { position: fixed; z-index: 40; left: 0; right: 0; bottom: 0; display: grid; grid-template-columns: 1fr 1fr; padding-bottom: env(safe-area-inset-bottom, 0px); background: var(--nd-ink); transform: translateY(110%); transition: transform 0.5s var(--nd-ease); }
  .nd-mbar.is-on { transform: none; }
  .nd-mbar a { display: grid; place-items: center; min-height: 58px; font-weight: 700; font-size: var(--nd-fs-sm); letter-spacing: 0.05em; text-decoration: none; color: var(--nd-paper); }
  .nd-mbar a + a { background: var(--nd-ember); color: var(--nd-ink); }
  .nd-footer { padding-bottom: calc(90px + env(safe-area-inset-bottom, 0px)); }
}

/* ---------- motion helpers ---------- */
.nd-js .nd-reveal { will-change: transform; }
.nd-marker { background: linear-gradient(transparent 62%, color-mix(in srgb, var(--nd-ember) 38%, transparent) 0) no-repeat 0 0 / var(--m, 100%) 100%; transition: background-size 1.1s var(--nd-ease); }

@media (prefers-reduced-motion: reduce) {
  .nd-site *, .nd-site *::before, .nd-site *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .nd-svg-flow { animation: none; }
}

/* exhaust fan blades in the diagram */
.nd-fan__blades { transform-box: fill-box; transform-origin: center; animation: nd-spin 1.4s linear infinite; }
@keyframes nd-spin { to { transform: rotate(360deg); } }
.nd-site section[id] { scroll-margin-top: 64px; }
@media (max-width: 440px) { .nd-duct__bar span + span { display: none; } }

/* who we serve: slow band of shop types */
.nd-marquee { background: var(--nd-ink); color: var(--nd-paper); overflow: hidden; padding-block: 18px; }
.nd-marquee__track { display: flex; align-items: center; gap: 28px; width: max-content; animation: nd-marquee 160s linear infinite;  /* the track holds 8 copies; each half must outrun the widest screen */ }
.nd-marquee span { font-family: var(--nd-display); font-size: clamp(1.1rem, 0.8rem + 1vw, 1.6rem); white-space: nowrap; letter-spacing: 0.04em; }
.nd-marquee i { width: 10px; height: 10px; background: var(--nd-ember); flex: none; transform: rotate(45deg); }
@keyframes nd-marquee { to { transform: translateX(-50%); } }

/* embers rising in the fire section */
.nd-embers { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }

/* ---------- work: before / after ---------- */
.nd-work { background: var(--nd-paper); }
.nd-work__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(24px, 4vw, 64px); align-items: start; }
.nd-work__cap { display: grid; gap: 4px; margin-top: 14px; font-size: var(--nd-fs-sm); line-height: 1.8; }
.nd-work__k { font-family: var(--nd-mono); font-size: 0.65rem; letter-spacing: 0.14em; color: var(--nd-ember-ink); }
.nd-work__side { display: grid; gap: clamp(24px, 3vw, 40px); }
.nd-ba, .nd-shot { margin: 0; }
@media (min-width: 901px) {
  .nd-ba { position: sticky; top: calc(var(--nd-header-h) + 24px); }
  .nd-ba__stage { max-height: calc(100svh - var(--nd-header-h) - 160px); }
}
.nd-ba__stage { position: relative; aspect-ratio: 3 / 4; max-width: 100%; overflow: hidden; background: var(--nd-soot); user-select: none; -webkit-user-select: none; touch-action: pan-y; }
.nd-ba__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.nd-ba__before { position: absolute; inset: 0; clip-path: inset(0 calc(100% - var(--x)) 0 0); }
.nd-ba__handle { position: absolute; top: 0; bottom: 0; left: var(--x); width: 2px; margin-left: -1px; background: var(--nd-paper); pointer-events: none; }
.nd-ba__handle span { position: absolute; top: 50%; left: 50%; width: 52px; height: 52px; margin: -26px 0 0 -26px; border-radius: 50%; background: var(--nd-ember); box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35); }
.nd-ba__handle span::before, .nd-ba__handle span::after { content: ""; position: absolute; top: 50%; width: 0; height: 0; border: 7px solid transparent; margin-top: -7px; }
.nd-ba__handle span::before { left: 7px; border-right-color: var(--nd-ink); }
.nd-ba__handle span::after { right: 7px; border-left-color: var(--nd-ink); }
.nd-ba__tag { position: absolute; top: 14px; padding: 6px 12px; font-size: var(--nd-fs-xs); font-weight: 700; letter-spacing: 0.08em; pointer-events: none; }
.nd-ba__tag--before { left: 14px; background: var(--nd-soot); color: #eef1f0; }
.nd-ba__tag--after { right: 14px; background: var(--nd-paper); color: var(--nd-ink); }
.nd-ba__range { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: ew-resize; -webkit-appearance: none; appearance: none; }
.nd-ba__range:focus-visible + .nd-ba__handle, .nd-ba__stage:focus-within .nd-ba__handle span { outline: 2px solid var(--nd-paper); outline-offset: 3px; }
.nd-shot__img { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--nd-soot); }
.nd-shot__img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 1.2s var(--nd-ease); }
.nd-shot:hover .nd-shot__img img { transform: scale(1.03); }
@media (max-width: 900px) { .nd-work__grid { grid-template-columns: minmax(0, 1fr); } .nd-ba__stage { max-height: 80svh; margin-inline: auto; } }

/* =========================================================
   Service pages (roaster / clearfood / duct / exchange)
   ========================================================= */
.nd-crumbs ol { display: flex; flex-wrap: wrap; gap: 6px 10px; font-family: var(--nd-mono); font-size: 0.65rem; letter-spacing: 0.1em; color: var(--nd-steel); }
.nd-crumbs li { display: inline-flex; align-items: center; gap: 10px; }
.nd-crumbs li + li::before { content: ""; width: 14px; height: 1px; background: currentColor; }
.nd-crumbs a { text-decoration: none; }
.nd-crumbs a:hover { color: var(--nd-ember-ink); }
.nd-crumbs [aria-current] { color: var(--nd-ink); }

/* page hero */
.nd-phero { position: relative; padding-top: calc(var(--nd-header-h) + clamp(16px, 2.4vw, 32px)); padding-bottom: clamp(56px, 7vw, 112px); overflow: hidden; }
.nd-phero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(90deg, transparent calc(100% - 1px), color-mix(in srgb, var(--nd-line) 55%, transparent) 0);
  background-size: calc(100% / 6) 100%;
  mask-image: linear-gradient(180deg, #000 30%, transparent); -webkit-mask-image: linear-gradient(180deg, #000 30%, transparent);
}
.nd-phero > .nd-wrap { position: relative; }
.nd-phero__grid { margin-top: clamp(28px, 4vw, 56px); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 88px); align-items: center; }
.nd-phero__copy { display: grid; gap: 26px; align-content: center; }
.nd-phero__title { font-family: var(--nd-display); font-weight: 400; font-size: clamp(2.1rem, 1.1rem + 3.1vw, 4.4rem); line-height: 1.2; letter-spacing: 0.01em; }
.nd-phero__title .nd-ch { display: inline-block; animation: nd-rise 0.7s var(--nd-ease) both; animation-delay: calc(var(--i) * 18ms + 60ms); }
.nd-phero__title em { font-style: normal; color: var(--nd-ember); }
.nd-phero__lead { font-size: var(--nd-fs-md); line-height: 2.05; max-width: 31em; }
.nd-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--nd-ink); margin-top: 6px; max-width: 34rem; }
.nd-facts li { display: grid; gap: 2px; padding: 14px 12px 0 0; font-size: var(--nd-fs-xs); color: var(--nd-steel); letter-spacing: 0.04em; }
.nd-facts li + li { padding-left: 14px; border-left: 1px solid var(--nd-line); }
.nd-facts b { font-family: var(--nd-display); font-weight: 400; font-size: clamp(1.05rem, 0.9rem + 0.5vw, 1.35rem); line-height: 1.3; color: var(--nd-ink); letter-spacing: 0.02em; }
.nd-phero__visual { position: relative; min-width: 0; }
.nd-phero__visual .nd-ba { position: relative; top: auto; max-width: calc(min(76svh, 700px) * 3 / 4); margin-left: auto; }
.nd-phero__visual .nd-ba__stage { max-height: none; }
@media (max-width: 960px) {
  .nd-phero__grid { grid-template-columns: minmax(0, 1fr); }
  .nd-phero__visual .nd-ba { max-width: calc(70svh * 3 / 4); margin-inline: auto; }
}
@media (max-width: 520px) { .nd-facts { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr); } .nd-facts li + li { padding-left: 10px; } }

/* hero photo composition (duct page) */
.nd-photostack { position: relative; padding: 0 0 clamp(48px, 7vw, 96px) 0; }
.nd-photostack__main { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--nd-soot); }
.nd-photostack__main img, .nd-photostack__inset img { width: 100%; height: 100%; object-fit: cover; }
.nd-photostack__inset { position: absolute; right: clamp(-8px, -1vw, 0px); bottom: 0; width: 46%; aspect-ratio: 4 / 3; overflow: hidden; background: var(--nd-soot); box-shadow: 0 0 0 clamp(6px, 0.8vw, 10px) var(--nd-zinc), 0 24px 60px rgba(0, 0, 0, 0.28); }
.nd-photostack__tag { position: absolute; left: 14px; top: 14px; padding: 6px 12px; font-size: var(--nd-fs-xs); font-weight: 700; letter-spacing: 0.08em; background: var(--nd-soot); color: #eef1f0; }
.nd-photostack__inset .nd-photostack__tag { background: var(--nd-paper); color: var(--nd-ink); }
.nd-photostack__cap { margin-top: 12px; font-family: var(--nd-mono); font-size: 0.62rem; letter-spacing: 0.12em; color: var(--nd-steel); max-width: 50%; }

/* hood art (clear hood page) */
.nd-art { position: relative; background: var(--nd-soot); color: #eef1f0; overflow: hidden; }
.nd-art svg { display: block; width: 100%; height: auto; }
.nd-art__bar { display: flex; justify-content: space-between; gap: 16px; padding: 14px 18px; font-family: var(--nd-mono); font-size: 0.62rem; letter-spacing: 0.12em; color: var(--nd-ash); border-bottom: 1px solid var(--nd-soot-line); }
.nd-art__bar b { color: #eef1f0; font-weight: 500; }
.nd-art .a-grid { stroke: #1d2325; stroke-width: 1; }
.nd-art .a-wall { fill: #171c1e; }
.nd-art .a-line { fill: none; stroke: #59625f; stroke-width: 2; }
.nd-art .a-duct { fill: none; stroke: #3a4345; stroke-width: 34; stroke-linejoin: round; }
.nd-art .a-duct-in { fill: none; stroke: #232a2c; stroke-width: 26; stroke-linejoin: round; }
.nd-art .a-flow { fill: none; stroke: var(--nd-ember); stroke-width: 3; stroke-dasharray: 2 16; stroke-linecap: round; animation: nd-flow 1.1s linear infinite; }
.nd-art .a-glass { fill: url(#nd-glass); stroke: rgba(238, 241, 240, 0.55); stroke-width: 1.5; }
.nd-art .a-shine { fill: none; stroke: rgba(255, 255, 255, 0.5); stroke-width: 3; stroke-linecap: round; }
.nd-art .a-table { fill: #2b3336; }
.nd-art .a-grill { fill: #0b0d0e; stroke: #59625f; stroke-width: 1.5; }
.nd-art .a-coal { fill: var(--nd-ember); filter: url(#nd-glow); }
.nd-art .a-smoke-base { fill: none; stroke: rgba(238, 241, 240, 0.12); stroke-width: 2; stroke-linecap: round; }
.nd-art .a-smoke { fill: none; stroke: rgba(238, 241, 240, 0.7); stroke-width: 2; stroke-linecap: round; stroke-dasharray: 48 200; animation: nd-smoke 3.2s linear infinite; }
.nd-art .a-smoke:nth-of-type(2) { animation-delay: -1.1s; } .nd-art .a-smoke:nth-of-type(3) { animation-delay: -2.2s; } .nd-art .a-smoke:nth-of-type(4) { animation-delay: -0.5s; }
@keyframes nd-smoke { from { stroke-dashoffset: 246; } to { stroke-dashoffset: 0; } }
.nd-art .a-label { font-family: var(--nd-mono); font-size: 11px; letter-spacing: 0.12em; fill: var(--nd-ash); }
.nd-art .a-label--ember { fill: var(--nd-ember); }
.nd-art .a-tick { stroke: var(--nd-ash); stroke-width: 1; }
.nd-art .nd-fan__blades { transform-box: fill-box; transform-origin: center; animation: nd-spin 1.4s linear infinite; }

/* big figures panel (supply page) */
.nd-figs { background: var(--nd-soot); color: #eef1f0; display: grid; }
.nd-fig { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px clamp(18px, 2.4vw, 32px); align-items: end; padding: clamp(22px, 2.8vw, 36px); border-bottom: 1px solid var(--nd-soot-line); }
.nd-fig:last-child { border-bottom: 0; }
.nd-fig__v { font-family: var(--nd-display); font-size: clamp(2.6rem, 1.2rem + 3vw, 4.6rem); line-height: 0.9; color: var(--nd-ember); letter-spacing: -0.01em; white-space: nowrap; }
.nd-fig__v small { font-size: 0.36em; color: #eef1f0; margin-left: 0.08em; }
.nd-fig__k { font-family: var(--nd-mono); font-size: 0.62rem; letter-spacing: 0.14em; color: var(--nd-ash); display: block; margin-bottom: 8px; }
.nd-fig__t { font-size: var(--nd-fs-sm); line-height: 1.9; color: #cfd6d5; }
.nd-fig--badge .nd-fig__v { font-size: clamp(1.6rem, 1rem + 1.8vw, 2.6rem); line-height: 1.25; color: #eef1f0; white-space: normal; }
@media (max-width: 520px) { .nd-fig { grid-template-columns: minmax(0, 1fr); } }

/* signs */
.nd-signs { background: var(--nd-zinc-2); }
.nd-signs__list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--nd-ink); }
.nd-sign { display: grid; gap: 14px; align-content: start; padding: 26px clamp(16px, 1.8vw, 28px) 30px 0; }
.nd-sign + .nd-sign { padding-left: clamp(16px, 1.8vw, 28px); border-left: 1px solid var(--nd-line); }
.nd-sign__no { font-family: var(--nd-mono); font-size: 0.7rem; letter-spacing: 0.14em; color: var(--nd-ember-ink); }
.nd-sign__title { font-weight: 700; font-size: var(--nd-fs-lg); line-height: 1.55; text-wrap: balance; }
.nd-sign__text { font-size: var(--nd-fs-sm); line-height: 1.95; }
@media (max-width: 1080px) {
  .nd-signs__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nd-sign:nth-child(3) { border-left: 0; padding-left: 0; }
  .nd-sign:nth-child(n+3) { border-top: 1px solid var(--nd-line); }
}
@media (max-width: 640px) {
  .nd-signs__list { grid-template-columns: minmax(0, 1fr); }
  .nd-sign, .nd-sign + .nd-sign { padding-left: 0; padding-right: 0; border-left: 0; }
  .nd-sign + .nd-sign { border-top: 1px solid var(--nd-line); }
}

/* text + visual split section */
.nd-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(32px, 5vw, 96px); align-items: center; }
.nd-split--rev > :first-child { order: 2; }
.nd-split .nd-section-head { margin-bottom: 0; }
.nd-split__body { display: grid; gap: 22px; }
.nd-split__text { font-size: var(--nd-fs-md); line-height: 2.05; max-width: 34em; }
.nd-merits { display: grid; border-top: 1px solid var(--nd-ink); }
.nd-merits li { display: grid; grid-template-columns: 3.2em minmax(0, 1fr); gap: 14px; align-items: baseline; padding: 16px 0; border-bottom: 1px solid var(--nd-line); font-weight: 700; line-height: 1.6; }
.nd-merits li span { font-family: var(--nd-mono); font-weight: 400; font-size: 0.7rem; letter-spacing: 0.12em; color: var(--nd-ember-ink); }
.nd-dark .nd-merits { border-top-color: #eef1f0; }
.nd-dark .nd-merits li { border-bottom-color: var(--nd-soot-line); }
.nd-dark .nd-merits li span { color: var(--nd-ember); }
.nd-link { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: var(--nd-fs-sm); letter-spacing: 0.04em; text-decoration: none; border-bottom: 1px solid currentColor; padding-bottom: 4px; justify-self: start; transition: color 0.3s var(--nd-ease), gap 0.3s var(--nd-ease); }
.nd-link svg { width: 16px; height: 16px; }
.nd-link:hover { color: var(--nd-ember-ink); gap: 14px; }
.nd-dark .nd-link:hover { color: var(--nd-ember); }
.nd-tagline { display: inline-flex; align-items: center; gap: 10px; padding: 8px 14px; border: 1px solid currentColor; font-size: var(--nd-fs-xs); font-weight: 700; letter-spacing: 0.06em; justify-self: start; }
.nd-tagline::before { content: ""; width: 8px; height: 8px; background: var(--nd-ember); transform: rotate(45deg); }
@media (max-width: 960px) { .nd-split { grid-template-columns: minmax(0, 1fr); } .nd-split--rev > :first-child { order: 0; } }

/* report sheet illustration (roaster page) */
.nd-sheet { background: var(--nd-paper); color: var(--nd-ink); box-shadow: 0 1px 0 var(--nd-line), 0 30px 70px rgba(15, 18, 19, 0.18); padding: clamp(18px, 2.4vw, 32px); display: grid; gap: 16px; transform: rotate(-1.2deg); max-width: 560px; margin-inline: auto; }
.nd-sheet__head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding-bottom: 12px; border-bottom: 2px solid var(--nd-ink); }
.nd-sheet__title { font-family: var(--nd-display); font-size: clamp(1.1rem, 0.9rem + 0.6vw, 1.45rem); }
.nd-sheet__k { font-family: var(--nd-mono); font-size: 0.6rem; letter-spacing: 0.14em; color: var(--nd-steel); }
.nd-sheet dl { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 6px 16px; margin: 0; font-size: var(--nd-fs-xs); }
.nd-sheet dt { color: var(--nd-steel); }
.nd-sheet dd { margin: 0; font-weight: 500; }
.nd-sheet__shots { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.nd-sheet__shots figure { margin: 0; display: grid; gap: 6px; }
.nd-sheet__shots img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.nd-sheet__shots figcaption { font-family: var(--nd-mono); font-size: 0.6rem; letter-spacing: 0.12em; color: var(--nd-steel); }
.nd-sheet__note { font-size: var(--nd-fs-xs); color: var(--nd-steel); }
.nd-sheet__stamp { justify-self: end; width: 64px; height: 64px; border: 2px solid var(--nd-ember-ink); border-radius: 50%; display: grid; place-items: center; color: var(--nd-ember-ink); font-weight: 700; font-size: 0.8rem; transform: rotate(-12deg); margin-top: -40px; }

/* photo pair (before / after, not aligned) */
.nd-pair { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: clamp(12px, 2vw, 28px); align-items: center; }
.nd-pair__arrow { width: clamp(40px, 4vw, 56px); height: clamp(40px, 4vw, 56px); border-radius: 50%; background: var(--nd-ember); display: grid; place-items: center; color: var(--nd-ink); }
.nd-pair__arrow svg { width: 45%; height: 45%; }
@media (max-width: 760px) { .nd-pair { grid-template-columns: minmax(0, 1fr); } .nd-pair__arrow { justify-self: center; transform: rotate(90deg); } }

/* emergency band (supply page) */
.nd-sos { position: relative; overflow: hidden; }
.nd-sos__grid { position: relative; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: clamp(24px, 5vw, 88px); align-items: center; }
.nd-sos__num { font-family: var(--nd-display); font-size: clamp(6rem, 3rem + 12vw, 15rem); line-height: 0.8; color: var(--nd-ember); letter-spacing: -0.03em; }
.nd-sos__title { font-family: var(--nd-display); font-weight: 400; font-size: clamp(1.7rem, 1rem + 2.4vw, 3.2rem); line-height: 1.3; }
.nd-sos__text { margin-top: 20px; font-size: var(--nd-fs-md); line-height: 2; color: #cfd6d5; max-width: 32em; }
@media (max-width: 760px) { .nd-sos__grid { grid-template-columns: minmax(0, 1fr); } }

/* other services */
.nd-more { background: var(--nd-zinc); }
.nd-more__list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--nd-line); border: 1px solid var(--nd-line); }
.nd-more__card { position: relative; display: grid; gap: 12px; align-content: start; min-height: 100%; padding: clamp(22px, 2.4vw, 34px); padding-bottom: 72px; background: var(--nd-paper); text-decoration: none; isolation: isolate; overflow: hidden; transition: color 0.4s var(--nd-ease); }
.nd-more__card::before { content: ""; position: absolute; inset: 0; z-index: -1; background: var(--nd-ink); transform: translateY(101%); transition: transform 0.55s var(--nd-ease); }
.nd-more__card:hover, .nd-more__card:focus-visible { color: var(--nd-paper); }
.nd-more__card:hover::before, .nd-more__card:focus-visible::before { transform: none; }
.nd-more__for { font-family: var(--nd-mono); font-size: 0.62rem; letter-spacing: 0.14em; color: var(--nd-steel); }
.nd-more__title { font-family: var(--nd-display); font-size: clamp(1.25rem, 1rem + 0.7vw, 1.6rem); line-height: 1.35; }
.nd-more__text { font-size: var(--nd-fs-sm); line-height: 1.9; }
.nd-more__arrow { position: absolute; left: clamp(22px, 2.4vw, 34px); bottom: 24px; width: 40px; height: 40px; border-radius: 50%; background: var(--nd-ember); color: var(--nd-ink); display: grid; place-items: center; transition: transform 0.4s var(--nd-ease); }
.nd-more__arrow svg { width: 16px; height: 16px; }
.nd-more__card:hover .nd-more__arrow { transform: translateX(6px); }
@media (max-width: 900px) { .nd-more__list { grid-template-columns: minmax(0, 1fr); } }

/* top page: service cards link to their pages */
/* the whole card is the link; the bar at the bottom says so */
.nd-service__more { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 6px; padding: 10px 10px 10px 16px; border: 1.5px solid var(--nd-ink); font-weight: 700; font-size: var(--nd-fs-sm); letter-spacing: 0.04em; text-decoration: none; transition: background-color 0.3s var(--nd-ease), color 0.3s var(--nd-ease); }
.nd-service__go { display: grid; place-items: center; width: 34px; height: 34px; flex: none; border-radius: 50%; background: var(--nd-ember); color: #fff; transition: transform 0.3s var(--nd-ease); }
.nd-service__go svg { width: 15px; height: 15px; }
.nd-service__more::after { content: ""; position: absolute; inset: 0; }
.nd-service:hover .nd-service__more, .nd-service__more:focus-visible { background: var(--nd-ink); color: #fff; }
.nd-service:hover .nd-service__go { transform: translateX(4px); }
.nd-service:hover .nd-service__title { color: var(--nd-ember-ink); }
.nd-service__for { display: flex; justify-content: space-between; gap: 12px; }
.nd-service__no { font-family: var(--nd-display); font-size: 1.1rem; letter-spacing: 0; color: var(--nd-ink); line-height: 1; }
.nd-services__head { margin-top: clamp(64px, 9vw, 120px); margin-bottom: 18px; display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 24px; }
.nd-services__head p { font-size: var(--nd-fs-sm); font-weight: 700; }
.nd-services__head + .nd-services { margin-top: 0; }
.nd-points__more { margin-top: 22px; }
.nd-service__title { transition: color 0.3s var(--nd-ease); }
.nd-phero__line { display: block; }
.nd-phero__line--fire { color: var(--nd-ember); }

/* Japanese line breaks at phrase boundaries (Chrome / Edge); others fall back to normal */
.nd-h2, .nd-sign__title, .nd-reason__title, .nd-sos__title, .nd-more__title, .nd-merits li, .nd-qa summary, .nd-service__title, .nd-step__title { word-break: keep-all; overflow-wrap: break-word; }
.nd-split .nd-h2 { font-size: clamp(1.9rem, 1.2rem + 2.2vw, 3.2rem); }
.nd-dark .nd-work__k { color: var(--nd-ember); }
.nd-dark .nd-work__cap { color: #cfd6d5; }
.nd-bg-paper { background: var(--nd-paper); }
.nd-bg-zinc { background: var(--nd-zinc); }
.nd-bg-zinc2 { background: var(--nd-zinc-2); }

/* ---------- price ---------- */
.nd-price__grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 64px); align-items: stretch; }
.nd-price__main { position: relative; overflow: hidden; background: var(--nd-soot); color: #eef1f0; padding: clamp(24px, 3.2vw, 48px); display: grid; gap: 18px; align-content: space-between; }
.nd-price__main::after { content: ""; position: absolute; inset: auto -20% -60% 30%; height: 90%; background: radial-gradient(50% 50% at 50% 50%, color-mix(in srgb, var(--nd-ember) 26%, transparent), transparent 70%); pointer-events: none; }
.nd-price__k { position: relative; display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; font-weight: 700; font-size: var(--nd-fs-lg); }
.nd-price__k small { font-family: var(--nd-mono); font-weight: 400; font-size: 0.65rem; letter-spacing: 0.14em; color: var(--nd-ash); }
.nd-price__v { position: relative; font-family: var(--nd-display); font-size: clamp(2.1rem, 1rem + 3.6vw, 5rem); line-height: 1.05; color: var(--nd-ember); font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.nd-price__v > span { white-space: nowrap; }
.nd-price__v .nd-price__to { color: #eef1f0; font-size: 0.55em; margin-inline: 0.12em; vertical-align: 0.18em; }
.nd-price__v small { font-size: 0.32em; color: #eef1f0; margin-left: 0.15em; }
.nd-price__note { position: relative; font-size: var(--nd-fs-sm); color: #cfd6d5; line-height: 1.9; }
.nd-price__list { margin: 0; border-top: 1px solid var(--nd-ink); display: grid; align-content: start; }
.nd-price__row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 20px; align-items: baseline; padding: 18px 0; border-bottom: 1px solid var(--nd-line); }
.nd-price__row dt { font-weight: 700; line-height: 1.6; }
.nd-price__row dd { margin: 0; font-family: var(--nd-mono); font-size: 0.85rem; font-variant-numeric: tabular-nums; color: var(--nd-ember-ink); text-align: right; }
.nd-price__row--zero dd { font-family: var(--nd-display); font-size: 1.6rem; color: var(--nd-ink); }
@media (max-width: 900px) { .nd-price__grid { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 480px) { .nd-price__row { grid-template-columns: minmax(0, 1fr); } .nd-price__row dd { text-align: left; } }

/* ---------- form: received ---------- */
.nd-form.is-sent > :not(.nd-form__done) { display: none; }
.nd-thanks { display: grid; gap: 14px; justify-items: start; padding: clamp(8px, 2vw, 24px) 0; background: none; border: 0; font-weight: 400; outline: none; }
.nd-thanks__mark { width: 64px; height: 64px; border-radius: 50%; background: var(--nd-ember); color: var(--nd-ink); display: grid; place-items: center; animation: nd-pop 0.6s var(--nd-ease) both; }
.nd-thanks__mark svg { width: 30px; height: 30px; }
.nd-thanks__mark path { stroke-dasharray: 30; stroke-dashoffset: 30; animation: nd-draw 0.5s 0.25s var(--nd-ease) forwards; }
@keyframes nd-pop { from { transform: scale(0.4); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes nd-draw { to { stroke-dashoffset: 0; } }
.nd-thanks__title { font-family: var(--nd-display); font-weight: 400; font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.3rem); line-height: 1.3; }
.nd-thanks__text { font-size: var(--nd-fs-md); line-height: 1.95; max-width: 30em; }
.nd-thanks__tel { font-size: var(--nd-fs-sm); line-height: 1.9; padding-top: 14px; border-top: 1px solid var(--nd-line); width: 100%; }
.nd-thanks__tel a { font-weight: 700; }
.nd-thanks__note { font-size: var(--nd-fs-xs); color: var(--nd-steel); }
.nd-price__tax { font-family: var(--nd-body); font-size: max(0.8em, 12px); letter-spacing: 0.04em; margin-left: 0.2em; }

/* ---------- service page parts added with the installation content ---------- */
.nd-sos .nd-sos__text { margin-top: 20px; }
.nd-merits li > div { display: grid; gap: 4px; }
.nd-merits li small { word-break: normal; }
.nd-merits li small { font-weight: 400; font-size: var(--nd-fs-sm); line-height: 1.8; color: var(--nd-steel); }
.nd-dark .nd-merits li small { color: var(--nd-ash); }
.nd-spec { display: grid; gap: 12px; }
.nd-split__note { font-size: var(--nd-fs-sm); line-height: 1.9; color: var(--nd-steel); }
.nd-demo { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 16px; align-items: start; padding: 18px 20px; background: var(--nd-ink); color: #eef1f0; }
.nd-demo__k { font-family: var(--nd-mono); font-size: 0.7rem; letter-spacing: 0.14em; color: var(--nd-ember); padding-top: 3px; }
.nd-demo__t { font-size: var(--nd-fs-sm); line-height: 1.9; color: #cfd6d5; }
.nd-demo__t strong { display: block; color: #eef1f0; font-size: var(--nd-fs-md); margin-bottom: 2px; }

.nd-scope { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid #eef1f0; }
.nd-scope li { word-break: keep-all; overflow-wrap: break-word; display: grid; grid-template-columns: 2.6em minmax(0, 1fr); gap: 10px; align-items: baseline; padding: 22px 24px 22px 0; border-bottom: 1px solid var(--nd-soot-line); font-weight: 700; line-height: 1.6; }
.nd-scope li:not(:nth-child(3n + 1)) { padding-left: 24px; border-left: 1px solid var(--nd-soot-line); }
.nd-scope li span { font-family: var(--nd-mono); font-weight: 400; font-size: 0.7rem; letter-spacing: 0.12em; color: var(--nd-ember); }
@media (max-width: 960px) {
  .nd-scope { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nd-scope li:not(:nth-child(3n + 1)) { padding-left: 0; border-left: 0; }
  .nd-scope li:nth-child(2n) { padding-left: 20px; border-left: 1px solid var(--nd-soot-line); }
}
@media (max-width: 560px) {
  .nd-scope { grid-template-columns: minmax(0, 1fr); }
  .nd-scope li:nth-child(2n) { padding-left: 0; border-left: 0; }
  .nd-scope li { padding-block: 16px; }
}

.nd-ledger { border-top: 1px solid var(--nd-ink); counter-reset: nd-ledger; }
.nd-ledger__row { counter-increment: nd-ledger; display: grid; grid-template-columns: 3em minmax(150px, 0.8fr) minmax(0, 1fr) minmax(0, 1.5fr); gap: clamp(14px, 2.4vw, 36px); align-items: baseline; padding-block: clamp(20px, 2.4vw, 30px); border-bottom: 1px solid var(--nd-line); }
.nd-ledger__row::before { content: counter(nd-ledger, decimal-leading-zero); font-family: var(--nd-mono); font-size: 0.7rem; letter-spacing: 0.12em; color: var(--nd-ember-ink); }
.nd-ledger__where { font-weight: 700; line-height: 1.5; display: grid; gap: 2px; }
.nd-ledger__where span { font-family: var(--nd-mono); font-weight: 400; font-size: 0.66rem; letter-spacing: 0.08em; color: var(--nd-steel); }
.nd-ledger__issue { font-weight: 700; font-size: var(--nd-fs-lg); line-height: 1.6; word-break: keep-all; overflow-wrap: break-word; }
.nd-ledger__done { font-size: var(--nd-fs-sm); line-height: 1.95; }
@media (max-width: 960px) {
  .nd-ledger__row { grid-template-columns: 2.6em minmax(0, 1fr); row-gap: 8px; }
  .nd-ledger__row > * { grid-column: 2; }
  .nd-ledger__row::before { grid-row: 1; grid-column: 1; }
}
.nd-notes__more { margin-top: clamp(24px, 3vw, 36px); }

.nd-notes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 44px); }
.nd-note { display: grid; gap: 10px; align-content: start; padding-top: 18px; border-top: 2px solid var(--nd-ink); }
.nd-note__k { font-family: var(--nd-mono); font-size: 0.66rem; letter-spacing: 0.1em; color: var(--nd-ember-ink); }
.nd-note__title { font-weight: 700; font-size: var(--nd-fs-lg); line-height: 1.5; word-break: keep-all; overflow-wrap: break-word; }
.nd-note__text { font-size: var(--nd-fs-sm); line-height: 1.95; }
.nd-dark .nd-note { border-top-color: #eef1f0; }
.nd-dark .nd-note__k { color: var(--nd-ember); }
.nd-dark .nd-note__text { color: #cfd6d5; }
@media (max-width: 860px) { .nd-notes { grid-template-columns: minmax(0, 1fr); } }

/* the construction flow has 8 steps: 4 per row, each step carries its own stretch of the line */
.nd-steps--long { grid-template-columns: repeat(4, minmax(0, 1fr)); row-gap: clamp(36px, 4vw, 56px); }
.nd-steps--long::before, .nd-steps--long::after { display: none; }
.nd-steps--long .nd-step::before { content: ""; position: absolute; left: 0; right: 0; top: 23px; height: 2px; background: var(--nd-line); z-index: -1; }
.nd-steps--long .nd-step:nth-child(4n)::before { right: auto; width: 48px; }
@media (max-width: 960px) {
  .nd-steps--long { grid-template-columns: minmax(0, 1fr); row-gap: 28px; }
  .nd-steps--long .nd-step::before, .nd-steps--long .nd-step:nth-child(4n)::before { left: 23px; right: auto; top: 0; bottom: -28px; width: 2px; height: auto; }
  .nd-steps--long .nd-step:last-child::before { display: none; }
}

.nd-sos__title em { font-style: normal; color: var(--nd-ember); }
.nd-nw { white-space: nowrap; }