:root {
  --ink: #142328;
  --ink-soft: #3a4f55;
  --paper: #f3f7f6;
  --paper-deep: #e4eeec;
  --teal: #0a4f56;
  --teal-mid: #13707a;
  --teal-soft: #d5ebe9;
  --accent: #c45c26;
  --line: rgba(20, 35, 40, 0.12);
  --white: #ffffff;
  --shadow-soft: 0 18px 40px rgba(10, 79, 86, 0.12);
  --font-display: "Bai Jamjuree", "Sarabun", sans-serif;
  --font-body: "Sarabun", sans-serif;
  --shell: min(1120px, calc(100% - 2.5rem));
  --header-h: 4.25rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 100% 0%, rgba(19, 112, 122, 0.08), transparent 55%),
    radial-gradient(ellipse 60% 40% at 0% 30%, rgba(196, 92, 38, 0.05), transparent 50%),
    linear-gradient(180deg, #eef5f4 0%, var(--paper) 28%, #f7faf9 100%);
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--teal);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--teal-mid);
}

h1,
h2,
h3,
.logo strong,
.hero-brand,
.eyebrow,
.trust-num {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.35rem);
  margin: 0.35rem 0 0.85rem;
  max-width: 14ch;
  font-weight: 700;
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  margin: 0 0 0.85rem;
  max-width: 22ch;
}

h3 {
  font-size: 1.2rem;
  margin: 0 0 0.4rem;
}

p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--teal);
  color: var(--white);
  padding: 0.5rem 0.85rem;
  z-index: 100;
  border-radius: 0.25rem;
}

.skip-link:focus {
  top: 1rem;
  color: var(--white);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(243, 247, 246, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(243, 247, 246, 0.94);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
  text-decoration: none;
}

.logo:hover {
  color: inherit;
}

.logo-mark {
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 0.4rem;
  background:
    linear-gradient(145deg, var(--teal-mid), var(--teal));
  position: relative;
  flex-shrink: 0;
}

.logo-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 0.95rem;
  height: 0.95rem;
  background:
    linear-gradient(var(--paper), var(--paper)) center / 0.28rem 100% no-repeat,
    linear-gradient(var(--paper), var(--paper)) center / 100% 0.28rem no-repeat;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo-text strong {
  font-size: 1.05rem;
  color: var(--ink);
}

.logo-text span {
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.98rem;
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--teal);
}

.nav-cta {
  color: var(--white) !important;
  background: var(--teal);
  padding: 0.55rem 1rem;
  border-radius: 0.3rem;
  transition: background 0.2s ease, transform 0.2s ease;
}

.nav-cta:hover {
  background: var(--teal-mid);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  background: transparent;
  padding: 0.55rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--ink);
  margin: 0.35rem 0;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.65rem 1.25rem;
  border-radius: 0.3rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #a84c1e;
  color: var(--white);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.55);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

/* Hero */
.hero {
  position: relative;
  min-height: min(92vh, 780px);
  display: flex;
  align-items: flex-end;
  color: var(--white);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.04);
  animation: hero-drift 18s ease-in-out infinite alternate;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(8, 40, 44, 0.88) 0%, rgba(8, 40, 44, 0.62) 48%, rgba(8, 40, 44, 0.28) 100%),
    linear-gradient(0deg, rgba(8, 40, 44, 0.55) 0%, transparent 45%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 5.5rem 0 4.5rem;
  animation: rise-in 0.85s ease both;
}

.hero-brand {
  margin: 0;
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  font-weight: 700;
  color: #d9f0ee;
}

.hero-lead {
  max-width: 38ch;
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.08rem;
  margin-bottom: 1.6rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@keyframes hero-drift {
  from { transform: scale(1.04) translate3d(0, 0, 0); }
  to { transform: scale(1.08) translate3d(-1.5%, -1%, 0); }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Sections */
.section {
  padding: clamp(3.5rem, 7vw, 5.5rem) 0;
}

.eyebrow {
  margin: 0 0 0.55rem;
  color: var(--teal-mid);
  font-size: 0.92rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.section-head {
  margin-bottom: 2.25rem;
}

.section-lead {
  max-width: 48ch;
  margin: 0;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

.about-visual {
  margin: 0;
  overflow: hidden;
  border-radius: 0.35rem;
  box-shadow: var(--shadow-soft);
}

.about-visual img {
  width: 100%;
  aspect-ratio: 5 / 4;
  object-fit: cover;
}

/* Products */
.products {
  background:
    linear-gradient(180deg, transparent, rgba(212, 235, 233, 0.45) 20%, rgba(212, 235, 233, 0.45) 80%, transparent);
}

.product-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem 1.35rem;
}

.product-list li {
  display: grid;
  gap: 0.9rem;
}

.product-list img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 0.3rem;
  filter: saturate(0.92);
  transition: transform 0.45s ease, filter 0.45s ease;
}

.product-list li:hover img {
  transform: scale(1.02);
  filter: saturate(1);
}

.product-list p {
  margin: 0;
  max-width: 40ch;
}

/* Trust */
.trust {
  background: var(--teal);
  color: var(--white);
}

.trust .eyebrow {
  color: #9fd4d0;
}

.trust h2 {
  color: var(--white);
  max-width: 20ch;
}

.trust-points {
  list-style: none;
  margin: 2.25rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  counter-reset: none;
}

.trust-points h3 {
  color: var(--white);
}

.trust-points p {
  color: rgba(255, 255, 255, 0.78);
  margin: 0;
  font-size: 0.98rem;
}

.trust-num {
  display: block;
  margin-bottom: 0.65rem;
  color: #7ec4bf;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

/* Customers */
.customers-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}

.customers-visual {
  margin: 0;
  overflow: hidden;
  border-radius: 0.35rem;
}

.customers-visual img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.plain-list {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.plain-list li {
  position: relative;
  padding-left: 1.15rem;
  color: var(--ink-soft);
  font-weight: 500;
}

.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--teal-mid);
  border-radius: 1px;
}

/* Contact */
.contact-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.92), rgba(229, 241, 239, 0.95));
  border: 1px solid var(--line);
  border-radius: 0.4rem;
}

.contact-details {
  margin: 1.5rem 0 0;
  display: grid;
  gap: 0.85rem;
}

.contact-details div {
  display: grid;
  gap: 0.15rem;
}

.contact-details dt {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--teal-mid);
}

.contact-details dd {
  margin: 0;
  color: var(--ink);
  font-weight: 500;
}

.contact-details a {
  color: var(--ink);
  text-decoration: none;
}

.contact-details a:hover {
  color: var(--teal);
  text-decoration: underline;
}

.contact-form {
  display: grid;
  gap: 0.85rem;
}

.contact-form label {
  display: grid;
  gap: 0.35rem;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(10, 79, 86, 0.22);
  border-radius: 0.3rem;
  padding: 0.7rem 0.85rem;
  font: inherit;
  font-weight: 400;
  color: var(--ink);
  background: var(--white);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--teal-mid);
  box-shadow: 0 0 0 3px rgba(19, 112, 122, 0.15);
}

.contact-form .btn {
  width: fit-content;
  margin-top: 0.25rem;
  border: 0;
}

.form-note {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.75rem 0 2.25rem;
  background: rgba(228, 238, 236, 0.55);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand strong {
  display: block;
  font-family: var(--font-display);
}

.footer-brand p,
.footer-copy {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .about-grid,
  .customers-grid,
  .contact-panel,
  .trust-points,
  .product-list {
    grid-template-columns: 1fr;
  }

  .trust-points {
    grid-template-columns: 1fr 1fr;
  }

  .hero {
    min-height: min(88vh, 680px);
  }

  .hero-veil {
    background:
      linear-gradient(180deg, rgba(8, 40, 44, 0.55) 0%, rgba(8, 40, 44, 0.78) 55%, rgba(8, 40, 44, 0.9) 100%);
  }

  h1 {
    max-width: 16ch;
  }
}

@media (max-width: 720px) {
  :root {
    --shell: min(100% - 1.5rem, 1120px);
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem 1.25rem 1.25rem;
    background: rgba(243, 247, 246, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
    border-bottom: 0 !important;
  }

  .trust-points {
    grid-template-columns: 1fr;
  }

  .hero-content {
    padding: 4.5rem 0 3.25rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-media img,
  .reveal,
  .product-list img {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}