@font-face {
  font-family: 'LineSeed';
  src: url('https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_11-01@1.0/LINESeedKR-Rg.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'LineSeed';
  src: url('https://cdn.jsdelivr.net/gh/projectnoonnu/noonfonts_11-01@1.0/LINESeedKR-Bd.woff2') format('woff2');
  font-weight: 700;
  font-display: swap;
}

:root {
  --c-black-900: #10151A;
  --c-teal-500: #00A6A6;
  --c-grey-100: #F1F1F1;
  --c-gold-500: #BF9B30;
  --c-grey-800: #2A333B;
  --font-display: 'LineSeed', 'IBM Plex Sans KR', system-ui, sans-serif;
  --font-body: 'IBM Plex Sans KR', system-ui, -apple-system, 'Malgun Gothic', sans-serif;
}

body {
  font-family: var(--font-body);
  background: var(--c-black-900);
  color: var(--c-grey-100);
}
h1, h2, h3, .logo { font-family: var(--font-display); }

header { background: var(--c-black-900); border-bottom: 1px solid var(--c-grey-800); }
header .logo { font-weight: 700; font-size: 1.2rem; color: var(--c-teal-500); }
header nav a { color: var(--c-grey-100); font-size: 0.9rem; opacity: 0.8; }
header nav a:hover, header nav a:focus-visible { opacity: 1; color: var(--c-teal-500); }

.hero { background: var(--c-grey-800); }
.hero .container { max-width: 740px; }
.hero h1 { font-size: clamp(1.9rem, 4.2vw, 2.5rem); color: #fff; }
.hero .lead { margin-top: 0.9rem; color: #c7ccd1; max-width: 34rem; }
.hero .btn-tel {
  margin-top: 1.4rem;
  display: inline-block;
  background: var(--c-teal-500);
  color: var(--c-black-900);
  padding: 0.85em 1.7em;
  border-radius: 4px;
  font-weight: 700;
}
.hero .btn-tel:hover { background: #14c2c2; }

main section > h2 { font-size: 1.5rem; color: #fff; margin-bottom: 1.3rem; }
main p { color: #c7ccd1; }
main p + p { margin-top: 0.8rem; }

/* dashboard card grid */
.dash-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.dash-card {
  background: var(--c-grey-800);
  border: 1px solid #3a4750;
  border-radius: 6px;
  padding: 1.1rem 1.2rem;
}
.dash-card .metric { font-family: var(--font-display); font-size: 1.6rem; color: var(--c-teal-500); font-weight: 700; }
.dash-card .metric-label { font-size: 0.82rem; color: #9aa4ab; margin-top: 0.2rem; }
.dash-card p { font-size: 0.86rem; color: #c7ccd1; margin-top: 0.6rem; }

.fit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.fit-col { border-radius: 6px; padding: 1.1rem 1.2rem; background: var(--c-grey-800); border: 1px solid #3a4750; }
.fit-col h3 { font-size: 1rem; margin-bottom: 0.7rem; }
.fit-col.good h3 { color: var(--c-teal-500); }
.fit-col.bad h3 { color: var(--c-gold-500); }
.fit-col ul { display: grid; gap: 0.5rem; font-size: 0.9rem; color: #c7ccd1; }

/* mandatory overpressure warning box, high-contrast */
.danger-box {
  background: #2b1f0d;
  border: 1px solid var(--c-gold-500);
  border-radius: 6px;
  padding: 1.1rem 1.2rem;
  margin-bottom: 1rem;
}
.danger-box .danger-label {
  display: inline-block;
  color: var(--c-gold-500);
  font-weight: 700;
  font-size: 0.82rem;
  margin-bottom: 0.5rem;
}
.danger-box p { color: var(--c-grey-100); }

.review-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
blockquote.review {
  background: var(--c-grey-800);
  border-radius: 6px;
  padding: 1rem 1.1rem;
  font-size: 0.9rem;
  color: #c7ccd1;
}
blockquote.review cite { display: block; margin-top: 0.5rem; font-style: normal; font-size: 0.8rem; color: var(--c-teal-500); }

.related-links { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.related-links a {
  border: 1px solid #3a4750;
  color: var(--c-grey-100);
  border-radius: 4px;
  padding: 0.5em 1.1em;
  font-size: 0.88rem;
}
.related-links a:hover { border-color: var(--c-teal-500); color: var(--c-teal-500); }

.cta { background: var(--c-teal-500); color: var(--c-black-900); }
.cta h3 { color: var(--c-black-900); margin-bottom: 0.6rem; font-size: 1.3rem; }
.cta p { color: #043838; margin-bottom: 1.1rem; }
.cta a[href^="tel:"] { background: var(--c-black-900); color: var(--c-teal-500); border-radius: 4px; font-weight: 700; }
.cta a[href^="tel:"]:hover { background: #05080a; }

footer { background: var(--c-grey-800); color: #9aa4ab; font-size: 0.85rem; }
footer a { color: #9aa4ab; }
footer nav a { margin-right: 0.2rem; }

figcaption { color: #9aa4ab; margin-top: 0.5rem; }

@media (max-width: 780px) {
  .dash-grid { grid-template-columns: 1fr; }
  .fit-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
}