:root {
  /* ink — bark-shadow near-black. structural: headings, buttons, dark sections, footer */
  --dp-primary: #171B12;
  --dp-primary-2: #232A1D;
  --dp-primary-3: #2C3524;
  --dp-primary-d: #0D0F0A;
  --dp-primary-d-rgb: 13, 15, 10;
  /* hazard — site-tag burgundy. the one accent color: links, ticks, tags, focus ring */
  --dp-accent: #8C2A3A;
  --dp-accent-soft: #EBC9CD;
  /* paper / stone — field-notebook off-white, cool sage-grey (not cream) */
  --dp-bg-soft: #F1F3EC;
  --dp-bg-warm: #E4E6DC;
  --dp-border: #C9CDBE;
  --dp-border-soft: #DCDFD1;
  --dp-text: #171B12;
  --dp-text-sub: #4B5044;
  --dp-text-muted: #767A68;

  --dp-font-heading: "IBM Plex Sans KR", "Pretendard", sans-serif;
  --dp-font-body: "Pretendard", sans-serif;
  /* IBM Plex Mono has no Hangul glyphs — Pretendard must come before the monospace fallback
     or Korean text inherits the Latin font's fixed advance width and gets stretched. */
  --dp-font-mono: "IBM Plex Mono", "Pretendard", ui-monospace, sans-serif;

  --dp-fs-h1: clamp(2.1rem, 6vw, 3.6rem);
  --dp-fs-h2: clamp(1.6rem, 3.4vw, 2.3rem);
  --dp-fs-h3: clamp(1.1rem, 1.8vw, 1.3rem);

  --dp-container: 1160px;
  --dp-gutter: clamp(20px, 4vw, 40px);
  --dp-sec-pad: clamp(56px, 9vw, 108px);
  --dp-radius: 0px;

  --dp-space-1: 4px; --dp-space-2: 8px; --dp-space-3: 12px; --dp-space-4: 16px;
  --dp-space-5: 24px; --dp-space-6: 32px; --dp-space-7: 48px; --dp-space-8: 64px;

  --sticky-h: 64px;
  color-scheme: only light;
}

* { min-width: 0; box-sizing: border-box; }
html, body { max-width: 100%; overflow-x: hidden; }
html { -webkit-text-size-adjust: 100%; }
img, video, table, pre { max-width: 100%; }
img { height: auto; }
* { -webkit-tap-highlight-color: transparent; }

body, p, h1, h2, h3, h4, h5, h6, li, td, th, a, span, div, button, label, figcaption {
  word-break: keep-all;
  overflow-wrap: break-word;
}

body {
  margin: 0;
  font-family: var(--dp-font-body);
  font-size: 19px;
  line-height: 1.7;
  color: var(--dp-text);
  background: #fff;
  padding-bottom: 0;
}
h1, h2, h3 { font-family: var(--dp-font-heading); font-weight: 700; line-height: 1.15; margin: 0 0 var(--dp-space-3); letter-spacing: -.01em; }
h1 { font-size: var(--dp-fs-h1); overflow: visible; white-space: normal; }
h2 { font-size: var(--dp-fs-h2); }
h3 { font-size: var(--dp-fs-h3); margin-bottom: var(--dp-space-2); }
p { margin: 0 0 var(--dp-space-4); color: var(--dp-text-sub); }
a { color: inherit; }

:where(a, button, [role="button"], summary) {
  touch-action: manipulation;
}
:where(a, button, [role="button"], summary):focus-visible {
  outline: 2px solid var(--dp-accent);
  outline-offset: 2px;
}

.container, main > article > section, main > section, .contact-actions {
  max-width: var(--dp-container);
  margin-inline: auto;
  padding-inline: var(--dp-gutter);
}
main > article > section, main > section { padding-block: var(--dp-sec-pad); }
.dp-section--soft { background: var(--dp-bg-soft); }
.dp-section--warm { background: var(--dp-bg-warm); }
.dp-section--dark { background: var(--dp-primary); color: #fff; }
.dp-section--dark p, .dp-section--dark h2 { color: #fff; }
.dp-section--dark .dp-callout { background: rgba(255,255,255,.06); }

.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-family: var(--dp-font-body); font-size: .74rem;
           font-weight: 500; letter-spacing: .04em; color: var(--dp-accent); margin-bottom: var(--dp-space-3); }
.eyebrow::before { content: ""; width: 7px; height: 7px; border: 1.5px solid currentColor; flex-shrink: 0; transform: rotate(45deg); }

/* header */
.hdr { display: flex; align-items: center; justify-content: space-between; gap: var(--dp-space-4);
       padding: var(--dp-space-3) var(--dp-gutter); background: #fff; border-bottom: 1px solid var(--dp-border-soft);
       position: sticky; top: 0; z-index: 100; }
.hdr-logo { display: flex; align-items: center; gap: 10px; min-width: 0; text-decoration: none; color: var(--dp-text); }
.hdr-logo__icon { border-radius: 6px; flex-shrink: 0; }
.hdr-logo__text { display: flex; flex-direction: column; min-width: 0; }
.hdr-logo__name { font-weight: 800; white-space: nowrap; font-size: 1.05rem; }
.hdr-logo__tagline { font-size: .72rem; color: var(--dp-text-muted); white-space: nowrap; overflow: visible; }
.hdr-nav__cta { display: inline-flex; align-items: center; min-height: 44px; padding: 0 var(--dp-space-5);
                background: var(--dp-primary); color: #fff; text-decoration: none; border-radius: var(--dp-radius); font-weight: 700; }
@media (max-width: 480px) { .hdr-logo__tagline { display: none; } }

/* hero — framed like a site hazard-assessment sheet: bordered photo, corner registration ticks */
.hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: var(--dp-space-7); align-items: start;
        padding-block: var(--dp-sec-pad); }
.hero__media { position: relative; padding: 10px; border: 1px solid var(--dp-border); }
.hero__media::before, .hero__media::after,
.hero__media .img-wrap::before, .hero__media .img-wrap::after { content: ""; position: absolute; width: 12px; height: 12px;
  border-color: var(--dp-accent); z-index: 2; }
.hero__media::before      { top: -1px; left: -1px; border-top: 2px solid; border-left: 2px solid; }
.hero__media::after       { top: -1px; right: -1px; border-top: 2px solid; border-right: 2px solid; }
.hero__media .img-wrap::before { bottom: -1px; left: -1px; border-bottom: 2px solid; border-left: 2px solid; }
.hero__media .img-wrap::after  { bottom: -1px; right: -1px; border-bottom: 2px solid; border-right: 2px solid; }
.hero__media .img-wrap { position: relative; border-radius: 0; }
.hero__tag { display: block; font-family: var(--dp-font-body); font-size: .7rem; color: var(--dp-text-muted);
             letter-spacing: .04em; margin-top: var(--dp-space-2); }
.hero__sub { font-size: 1.08rem; color: var(--dp-text-sub); }
.hero__sub em { font-style: normal; color: var(--dp-accent); font-weight: 700; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--dp-space-3); margin-top: var(--dp-space-5); }
.hero__meta { display: flex; flex-wrap: wrap; gap: var(--dp-space-2) var(--dp-space-6); margin-top: var(--dp-space-7);
              padding-top: var(--dp-space-5); border-top: 1px solid var(--dp-border-soft); }
.hero__meta div { font-family: var(--dp-font-body); font-size: .78rem; color: var(--dp-text-muted); }
.hero__meta strong { display: block; font-family: var(--dp-font-body); font-size: 1rem; font-weight: 700; color: var(--dp-text); margin-top: 2px; }
@media (max-width: 768px) { .hero, .hero--sub { grid-template-columns: 1fr; } .hero__media { order: 0; } }

/* neutral placeholder tone — without this, an image that hasn't finished loading yet is
   invisible against dark sections (looks like a missing block while scrolling/on slow connections) */
.img-wrap { overflow: hidden; border-radius: var(--dp-radius); background: var(--dp-border-soft); }
.img-wrap svg { display: block; }
.img-wrap img { width: 100%; height: 100%; object-fit: cover; display: block; }
main :is(figure, .card, section) > img { aspect-ratio: 16/9; object-fit: cover; display: block; }

/* CTA buttons */
.dp-cta { display: inline-flex; align-items: center; justify-content: center; min-height: 52px;
          padding: 14px 32px; background: var(--dp-primary); color: #fff; text-decoration: none;
          border-radius: var(--dp-radius); font-weight: 700; transition: transform .18s ease, background .18s ease; }
.dp-cta--outline { background: transparent; color: var(--dp-primary); border: 2px solid var(--dp-primary); }
.dp-cta--block { width: 100%; }
@media (hover: hover) and (pointer: fine) {
  .dp-cta:hover { transform: translateY(-2px); background: var(--dp-primary-2); }
  .dp-cta--outline:hover { background: var(--dp-primary); color: #fff; }
}

/* checklist / compare / callout / spec */
.dp-checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--dp-space-3); max-width: 720px; }
.dp-checklist li { position: relative; padding-left: 32px; }
.dp-checklist li::before { content: ""; position: absolute; left: 1px; top: .5em; width: 15px; height: 2px;
                            background: var(--dp-accent); transform: rotate(-38deg); transform-origin: left center; }
.dp-section--dark .dp-checklist li::before { background: var(--dp-accent-soft); }

/* hazard diagram — homepage signature graphic, paired with the problem checklist */
.dp-diagram-row { display: grid; grid-template-columns: 1fr .85fr; gap: var(--dp-space-7); align-items: center; margin-top: var(--dp-space-6); }
.dp-diagram { margin: 0; border: 1px solid var(--dp-border); background: #fff; padding: var(--dp-space-4); }
.dp-diagram svg { display: block; aspect-ratio: 4/3; }
.dp-diagram figcaption { font-family: var(--dp-font-body); font-size: .68rem; color: var(--dp-text-muted);
                          margin-top: var(--dp-space-3); text-align: center; }
@media (max-width: 768px) { .dp-diagram-row { grid-template-columns: 1fr; } }
.dp-callout { border-left: 3px solid var(--dp-accent); background: var(--dp-bg-warm); padding: var(--dp-space-5); border-radius: var(--dp-radius); margin-bottom: var(--dp-space-6); }
.dp-callout strong { display: block; margin-bottom: var(--dp-space-2); }
.dp-section--dark .dp-callout strong { color: var(--dp-accent-soft); }
.dp-spec { display: grid; gap: var(--dp-space-3); max-width: 640px; }
.dp-spec > div { display: grid; grid-template-columns: 35% 65%; padding-bottom: var(--dp-space-3); border-bottom: 1px solid var(--dp-border-soft); }
.dp-spec dt { font-weight: 700; margin: 0; }
.dp-spec dd { margin: 0; color: var(--dp-text-sub); }

/* cost table */
[data-comp="costtable"] { overflow-x: auto; }
[data-comp="costtable"] table { width: 100%; border-collapse: collapse; min-width: 480px; }
[data-comp="costtable"] caption { text-align: left; font-size: .82rem; color: var(--dp-text-muted); margin-bottom: var(--dp-space-3); }
[data-comp="costtable"] th, [data-comp="costtable"] td { text-align: left; padding: var(--dp-space-3) var(--dp-space-4); border: 1px solid var(--dp-border-soft); }
[data-comp="costtable"] th { background: var(--dp-bg-warm); }
[data-comp="costtable"] tbody tr:nth-child(even) { background: var(--dp-bg-soft); }

/* process timeline (rule 10 reference impl) */
:root { --proc-badge: 46px; --proc-badge-radius: 0px; --proc-line: 2px; }
.proc-list { display: flex; flex-wrap: nowrap; list-style: none; margin: 0; padding: 0; }
.proc-step { flex: 1 1 0; min-width: 0; position: relative; padding: 0 var(--dp-space-3); text-align: center; }
.proc-step:not(:last-child)::after {
  content: ''; position: absolute; z-index: 0;
  top: calc(var(--proc-badge) / 2 - var(--proc-line) / 2);
  left: 50%; width: 100%; height: var(--proc-line); background: var(--dp-border);
}
.dp-section--dark .proc-step:not(:last-child)::after { background: rgba(255,255,255,.25); }
.proc-num { position: relative; z-index: 1; width: var(--proc-badge); height: var(--proc-badge);
            margin: 0 auto var(--dp-space-3); border-radius: var(--proc-badge-radius);
            background: var(--dp-accent); color: #fff; font-weight: 700;
            display: flex; align-items: center; justify-content: center; }
.proc-step__meta { display: block; font-size: .8rem; color: var(--dp-text-muted); margin-top: var(--dp-space-1); }
.dp-section--dark .proc-step__meta, .dp-section--dark .proc-step p { color: rgba(255,255,255,.72); }
@media (max-width: 1024px) {
  .proc-list { flex-direction: column; gap: var(--dp-space-6); }
  .proc-step { padding: 0 0 0 calc(var(--proc-badge) + var(--dp-space-4)); text-align: left; }
  .proc-num { position: absolute; left: 0; top: 0; margin: 0; }
  .proc-step:not(:last-child)::after {
    top: var(--proc-badge); left: calc(var(--proc-badge) / 2 - var(--proc-line) / 2);
    width: var(--proc-line); height: calc(100% + var(--dp-space-6));
  }
}

/* compare */
.dp-compare { display: grid; grid-template-columns: 1fr 1fr; gap: var(--dp-space-5); margin-top: var(--dp-space-7); }
.dp-compare__col { border: 1px solid var(--dp-border-soft); border-radius: var(--dp-radius); padding: var(--dp-space-5); }
.dp-compare__col:last-child { border-top: 3px solid var(--dp-accent); }
.dp-compare__col h3 { margin-bottom: var(--dp-space-2); }
@media (max-width: 768px) { .dp-compare { grid-template-columns: 1fr; } }
.dp-section__why { max-width: 720px; margin-top: var(--dp-space-5); }

/* jobsite photo pair */
.dp-ba { display: grid; grid-template-columns: 1fr 1fr; gap: var(--dp-space-5); }
.dp-ba figure { margin: 0; position: relative; }
@media (max-width: 768px) { .dp-ba { grid-template-columns: 1fr; } }

/* FAQ accordion */
.dp-faq { max-width: 760px; margin-top: var(--dp-space-5); }
.dp-faq__item { border-bottom: 1px solid var(--dp-border-soft); padding: var(--dp-space-4) 0; }
.dp-section--dark .dp-faq__item { border-color: rgba(255,255,255,.15); }
.dp-faq__item summary { cursor: pointer; font-weight: 700; min-height: 44px; display: flex; align-items: center; list-style: none; }
.dp-faq__item summary::-webkit-details-marker { display: none; }
.dp-faq__item summary::before { content: "+"; margin-right: var(--dp-space-3); color: var(--dp-accent); font-weight: 800; }
.dp-faq__item[open] summary::before { content: "–"; }
.dp-faq__item p { margin-top: var(--dp-space-3); }

/* card grid */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--dp-space-5);
             align-items: stretch; grid-auto-rows: 1fr; list-style: none; margin: 0; padding: 0; }
.card { display: flex; flex-direction: column; height: 100%; min-width: 0; text-decoration: none;
        color: inherit; border: 1px solid var(--dp-border-soft); border-radius: var(--dp-radius); overflow: hidden;
        transition: transform .2s ease, box-shadow .2s ease; }
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(0,0,0,.08); }
.card__img-wrap { display: block; }
.card__body { display: flex; flex-direction: column; flex: 1; padding: var(--dp-space-5); gap: var(--dp-space-2); }
.card__num { font-family: var(--dp-font-mono); font-size: .72rem; font-weight: 600; letter-spacing: .06em;
             color: var(--dp-accent); border: 1px solid var(--dp-border); padding: 2px 7px; display: inline-block; align-self: flex-start; }
.card__title { margin: 0; font-size: 1.1rem; }
.card__desc { margin: 0; font-size: .88rem; color: var(--dp-text-sub); line-height: 1.55; }
.card__more { margin-top: auto; font-size: .85rem; font-weight: 700; color: var(--dp-accent); }
.card--cta { background: var(--dp-primary); color: #fff; justify-content: center; align-items: center; text-align: center; }
.card--cta .card__title, .card--cta .card__more { color: #fff; }
@media (max-width: 1024px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .card-grid { grid-template-columns: 1fr; } }

/* CTA banner */
.dp-cta-banner { display: grid; grid-template-columns: .9fr 1.1fr; align-items: stretch; background: var(--dp-primary); color: #fff; }
/* width+height both definite so the inline aspect-ratio (set by hz_img) doesn't override the
   grid column's width and blow the photo out past its column (real bug, found via screenshot). */
.dp-cta-banner__media .img-wrap { width: 100%; height: 100%; aspect-ratio: auto; border-radius: 0; }
.dp-cta-banner__body { padding: var(--dp-sec-pad) var(--dp-gutter); display: flex; flex-direction: column; justify-content: center; }
.dp-cta-banner__body h2, .dp-cta-banner__body p { color: #fff; }
.dp-cta-banner__actions { display: flex; flex-wrap: wrap; gap: var(--dp-space-3); margin: var(--dp-space-5) 0; }
.dp-cta-banner .dp-cta--outline { color: #fff; border-color: #fff; }
.dp-cta-banner small { color: rgba(255,255,255,.7); }
@media (max-width: 768px) { .dp-cta-banner { grid-template-columns: 1fr; } .dp-cta-banner__media { order: -1; } }

/* contact page */
.contact-actions { display: grid; grid-template-columns: 1fr 1fr; gap: var(--dp-space-5); }
.contact-card { min-height: 300px; padding: var(--dp-space-7) var(--dp-space-6); border: 1px solid var(--dp-border-soft);
                border-radius: var(--dp-radius); display: flex; flex-direction: column; height: 100%; text-align: center; }
.contact-phone__num { font-size: clamp(1.8rem, 5vw, 2.6rem); font-weight: 800; margin: var(--dp-space-4) 0; }
.contact-phone__num a { text-decoration: none; white-space: nowrap; }
.contact-card__cta { margin-top: auto; }
@media (max-width: 768px) { .contact-actions { grid-template-columns: 1fr; } }

/* back-to-main */
.dp-back-main { margin-top: var(--dp-space-6); }
.dp-back-main a { text-decoration: underline; color: var(--dp-text-muted); }

/* footer */
.site-footer { background: var(--dp-primary); color: rgba(255,255,255,.85); padding-block: var(--dp-space-8) var(--dp-space-6); position: relative; overflow: hidden; }
.ft-inner { max-width: var(--dp-container); margin-inline: auto; padding-inline: var(--dp-gutter);
            display: grid; grid-template-columns: 1.6fr 1fr; gap: var(--dp-space-7); text-align: left; align-items: start; }
.ft-cluster__title { color: #fff; font-size: 15px; margin-bottom: var(--dp-space-3); }
.ft-cluster ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--dp-space-2); }
.ft-cluster a { color: rgba(255,255,255,.85); }
.ft-bottom { max-width: var(--dp-container); margin-inline: auto; padding-inline: var(--dp-gutter);
             margin-top: var(--dp-space-6); padding-top: var(--dp-space-4); border-top: 1px solid rgba(255,255,255,.15); }
@media (max-width: 768px) { .ft-inner { grid-template-columns: 1fr; text-align: left; } }

/* sticky bar + floating cta */
.dp-sticky-bar { position: fixed; bottom: 0; left: 0; right: 0; z-index: 90; display: none;
                 padding: var(--dp-space-3) var(--dp-gutter) calc(var(--dp-space-3) + env(safe-area-inset-bottom));
                 background: #fff; border-top: 1px solid var(--dp-border-soft); }
.dp-float-cta { position: fixed; right: var(--dp-space-4); z-index: 80;
                bottom: calc(var(--sticky-h) + var(--dp-space-4) + env(safe-area-inset-bottom));
                width: 56px; height: 56px; border-radius: var(--dp-radius); background: var(--dp-primary-3);
                color: var(--dp-accent-soft); display: flex; align-items: center; justify-content: center;
                border-left: 3px solid var(--dp-accent); text-decoration: none; }
.dp-float-cta svg { width: 24px; height: 24px; }
@media (max-width: 768px) {
  .dp-sticky-bar { display: block; }
  body { padding-bottom: calc(var(--sticky-h) + env(safe-area-inset-bottom)); }
}

/* scroll reveal */
.js [data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.js [data-reveal].is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
}
@keyframes dp-pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(140,42,58,.35); } 50% { box-shadow: 0 0 0 8px rgba(140,42,58,0); } }
.dp-float-cta { animation: dp-pulse 2.4s ease-in-out infinite; }