:root {
  --paper: #efeae1;
  --paper-2: #e6dfd3;
  --card: #f7f4ee;
  --ink: #16211c;
  --muted: #5d675f;
  --line: rgba(22, 33, 28, 0.14);
  --forest: #12382c;
  --forest-2: #1d5c45;
  --lime: #def25b;
  --white: #fffcf7;
  --shadow: 0 24px 60px rgba(22, 33, 28, 0.08);
  --serif: "IBM Plex Sans Thai", "IBM Plex Sans", sans-serif;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--ink);
  color: white;
  padding: 8px 12px;
  z-index: 20;
}
.skip:focus { top: 12px; }

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 6vw;
  background: rgba(239, 234, 225, 0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
}
.nav.scrolled { border-bottom-color: var(--line); }
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.16em;
  font-size: 15px;
}
.mark {
  width: 28px;
  height: 28px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 15px;
}
.nav-links a:hover { color: var(--ink); }
.nav-cta, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  background: var(--forest);
  color: var(--white);
  border-radius: 999px;
  padding: 12px 18px;
  font-size: 15px;
}
.btn.lime { background: var(--lime); color: var(--ink); }
.btn.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.menu-btn {
  display: none;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 999px;
  padding: 8px 12px;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: end;
  padding: 42px 6vw 28px;
  max-width: 1440px;
  margin: 0 auto;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--forest-2);
  font-weight: 600;
}
.eyebrow:before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--forest-2);
}
h1 {
  font-size: clamp(40px, 5vw, 68px);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 14px 0 16px;
}
.lead { font-size: 18px; color: var(--muted); max-width: 640px; margin: 0 0 28px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 36px;
}
.metric {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.metric b { display: block; font-size: 22px; font-weight: 600; letter-spacing: -0.03em; }
.metric span { color: var(--muted); font-size: 14px; }
.hero-visual {
  background: var(--white);
  border-radius: 28px;
  padding: 18px 18px 16px;
  box-shadow: var(--shadow);
}
.hero-visual img { width: 100%; height: 460px; object-fit: contain; }
.caption {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 8px 4px;
  color: var(--muted);
  font-size: 13px;
}

.band, .section { padding: 72px 6vw; }
.section { max-width: 1440px; margin: 0 auto; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 28px;
}
h2 {
  font-size: clamp(30px, 3vw, 44px);
  line-height: 1.2;
  letter-spacing: -0.03em;
  font-weight: 600;
  margin: 0;
}
.section-head p { max-width: 420px; color: var(--muted); margin: 0; }

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.filters button {
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
  color: var(--muted);
}
.filters button.active {
  background: var(--ink);
  color: var(--white);
  border-color: var(--ink);
}

.catalog { display: grid; gap: 10px; }
.product {
  display: grid;
  grid-template-columns: 72px 1.3fr 0.7fr 1fr auto;
  gap: 16px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px 20px;
  text-decoration: none;
}
.product:hover { border-color: var(--forest-2); }
.idx { color: var(--muted); font-variant-numeric: tabular-nums; }
.product h3 { margin: 0 0 2px; font-size: 20px; font-weight: 600; }
.product .cat { color: var(--muted); font-size: 14px; }
.kw { font-size: 20px; font-weight: 600; letter-spacing: -0.03em; }
.blurb { color: var(--muted); font-size: 15px; }
.more { color: var(--forest-2); font-weight: 600; font-size: 14px; white-space: nowrap; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
  background: var(--forest);
  color: var(--white);
  border-radius: 32px;
  overflow: hidden;
  margin: 10px 6vw 20px;
}
.split img { width: 100%; height: 100%; min-height: 420px; object-fit: cover; background: white; }
.split-copy { padding: 48px 42px; }
.split-copy h2 { color: white; }
.split-copy p { color: rgba(255,252,247,.78); }
.split-copy .eyebrow { color: var(--lime); }
.split-copy .eyebrow:before { background: var(--lime); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.chips span {
  border: 1px solid rgba(255,252,247,.25);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 14px;
}

.sheet {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 28px;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}
.sheet h3 { margin: 8px 0; font-size: 32px; letter-spacing: -0.03em; }
.kicker { color: var(--forest-2); font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 600; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
th { width: 38%; color: var(--muted); font-weight: 500; }

.solutions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.solution {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
  min-height: 210px;
}
.solution strong { display: block; font-size: 20px; margin-bottom: 8px; }
.solution p { margin: 0; color: var(--muted); }

.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.note {
  background: var(--lime);
  border-radius: 24px;
  padding: 28px;
}
.note p { margin: 0 0 10px; }

.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 28px;
}
form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
label.full { grid-column: 1 / -1; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 12px;
  padding: 12px 14px;
  color: var(--ink);
}
textarea { min-height: 120px; resize: vertical; }
.hp { position: absolute; left: -9999px; }
.form-status {
  grid-column: 1 / -1;
  background: var(--forest);
  color: white;
  border-radius: 12px;
  padding: 12px 14px;
}
footer {
  padding: 28px 6vw 40px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  font-size: 14px;
}
footer a { color: var(--forest-2); }

@media (max-width: 980px) {
  .hero, .split, .sheet, .solutions, .about, .contact-grid, .product {
    grid-template-columns: 1fr;
  }
  .metrics { grid-template-columns: 1fr 1fr; }
  .hero-visual img, .split img { height: 280px; min-height: 0; }
  .menu-btn { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 6vw;
    right: 6vw;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 16px;
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-links.open { display: flex; }
  .product .blurb { display: none; }
}
@media (max-width: 640px) {
  form { grid-template-columns: 1fr; }
  h1 { font-size: 36px; }
}