:root {
  --navy-950: #071426;
  --navy-900: #0b1f3a;
  --navy-800: #102a4d;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --white: #ffffff;
  --cyan-600: #0284c7;
  --cyan-500: #0ea5e9;
  --cyan-400: #38bdf8;
  --amber-500: #f59e0b;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(11, 31, 58, 0.08);
  --shadow-md: 0 10px 30px rgba(11, 31, 58, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans Thai", "Inter", system-ui, -apple-system, sans-serif;
  color: var(--slate-700);
  background-color: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1160px, 100% - 2rem);
  margin-inline: auto;
}

/* Topbar */
.topbar {
  background-color: var(--navy-950);
  color: #cbd5e1;
  font-size: 0.825rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem 1rem;
  padding: 0.45rem 0;
}

.topbar-info,
.topbar-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.topbar-contact a:hover {
  color: var(--cyan-400);
}

.divider {
  opacity: 0.4;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--slate-200);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 70px;
}

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

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--slate-200);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: "Inter", "Noto Sans Thai", sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--navy-900);
}

.brand-sub {
  font-size: 0.78rem;
  color: var(--slate-500);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.nav-link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--slate-700);
  transition: color 0.15s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--cyan-600);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  padding: 0.45rem;
  color: var(--navy-900);
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

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

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.88rem;
}

.btn-full {
  width: 100%;
}

.btn-primary {
  background-color: var(--cyan-600);
  color: var(--white);
}

.btn-primary:hover {
  background-color: #0369a1;
}

.btn-outline {
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--white);
  background-color: rgba(255, 255, 255, 0.06);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.14);
}

.btn-outline-dark {
  border-color: var(--navy-900);
  color: var(--navy-900);
  background-color: var(--white);
}

.btn-outline-dark:hover {
  background-color: var(--slate-100);
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--navy-950) 0%, var(--navy-800) 100%);
  color: var(--white);
  padding: 4rem 0 4.5rem;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(56, 189, 248, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.06) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 2.5rem;
}

.eyebrow {
  margin: 0 0 0.65rem;
  font-family: "Inter", sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cyan-600);
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--cyan-400);
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 3vw, 2.55rem);
  line-height: 1.25;
  color: var(--white);
}

.hero-lead {
  margin: 0 0 1.4rem;
  color: #cbd5e1;
  font-size: 1.02rem;
}

.hero-lead strong {
  color: var(--white);
}

.hero-highlights {
  list-style: none;
  padding: 0;
  margin: 0 0 1.8rem;
  display: grid;
  gap: 0.55rem;
}

.hero-highlights li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: #e2e8f0;
  font-size: 0.95rem;
}

.hero-highlights svg {
  color: var(--amber-500);
  flex-shrink: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.hero-card {
  background-color: rgba(15, 23, 42, 0.72);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero-banner {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.hero-card-meta {
  padding: 1rem 1.2rem;
  display: grid;
  gap: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.meta-label {
  display: block;
  font-size: 0.75rem;
  color: #94a3b8;
}

.meta-value {
  font-weight: 600;
  color: var(--white);
  font-size: 0.95rem;
  word-break: break-word;
}

.meta-value:hover {
  color: var(--cyan-400);
}

/* Sections */
.section {
  padding: 4.25rem 0;
}

.section-alt {
  background-color: var(--slate-50);
  border-top: 1px solid var(--slate-200);
  border-bottom: 1px solid var(--slate-200);
}

.section-head {
  max-width: 680px;
  margin-bottom: 2.25rem;
}

.section-head h2,
.about-th h2,
.contact-info h2 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.45rem, 2.4vw, 1.95rem);
  color: var(--navy-900);
  line-height: 1.3;
}

.section-desc {
  margin: 0;
  color: var(--slate-600);
}

/* Product Cards */
.cards-grid {
  display: grid;
  gap: 1.25rem;
}

.cards-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background-color: #e0f2fe;
  color: var(--cyan-600);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.card h3 {
  margin: 0 0 0.2rem;
  font-family: "Inter", "Noto Sans Thai", sans-serif;
  font-size: 1.08rem;
  color: var(--navy-900);
}

.card-sub {
  margin: 0 0 0.9rem;
  font-size: 0.85rem;
  color: var(--slate-500);
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--slate-100);
}

.card-list {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.4rem;
  font-size: 0.92rem;
  color: var(--slate-700);
}

/* Services */
.services-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: start;
}

.service-features {
  display: grid;
  gap: 1.25rem;
}

.feature-item {
  display: flex;
  gap: 1rem;
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 1.35rem;
}

.feature-num {
  font-family: "Inter", sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--cyan-600);
  flex-shrink: 0;
  padding-top: 0.1rem;
}

.feature-item h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  color: var(--navy-900);
}

.feature-item p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--slate-600);
}

.workflow-box {
  background-color: var(--navy-900);
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
}

.workflow-box h3 {
  margin: 0 0 1.15rem;
  font-size: 1.15rem;
}

.workflow-steps {
  margin: 0 0 1.5rem;
  padding-left: 1.2rem;
  display: grid;
  gap: 1rem;
}

.workflow-steps li strong {
  display: block;
  margin-bottom: 0.15rem;
  color: var(--white);
}

.workflow-steps li span {
  display: block;
  font-size: 0.88rem;
  color: #cbd5e1;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.about-th p {
  margin: 0 0 1rem;
}

.about-en {
  background-color: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-left: 4px solid var(--cyan-600);
  border-radius: var(--radius-md);
  padding: 1.6rem;
}

.about-en h3 {
  margin: 0 0 0.65rem;
  font-family: "Inter", sans-serif;
  color: var(--navy-900);
}

.about-en-list {
  margin: 0.85rem 0 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.5rem;
  font-size: 0.92rem;
}

/* Contact & RFQ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.contact-list {
  margin: 1.5rem 0 0;
  border-top: 1px solid var(--slate-200);
}

.contact-row {
  display: grid;
  grid-template-columns: 135px 1fr;
  gap: 0.75rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--slate-200);
}

.contact-row dt {
  font-weight: 600;
  color: var(--navy-900);
  font-size: 0.92rem;
}

.contact-row dd {
  margin: 0;
  font-size: 0.94rem;
  word-break: break-word;
}

.contact-row a {
  color: var(--cyan-600);
  font-weight: 500;
}

.contact-row a:hover {
  text-decoration: underline;
}

.rfq-panel {
  background-color: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.rfq-panel h3 {
  margin: 0 0 0.35rem;
  color: var(--navy-900);
  font-size: 1.15rem;
}

.rfq-note {
  margin: 0 0 1.25rem;
  font-size: 0.88rem;
  color: var(--slate-500);
}

.rfq-form {
  display: grid;
  gap: 1rem;
}

.form-row label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--navy-900);
}

.form-row input,
.form-row textarea {
  width: 100%;
  padding: 0.65rem 0.8rem;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font: inherit;
  font-size: 0.94rem;
  color: var(--slate-700);
  background-color: var(--white);
}

.form-row input:focus,
.form-row textarea:focus {
  outline: 2px solid rgba(2, 132, 199, 0.25);
  border-color: var(--cyan-600);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

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

.rfq-status {
  margin: 0;
  font-size: 0.88rem;
  color: var(--cyan-600);
  min-height: 1.25em;
}

/* Footer */
.footer {
  background-color: var(--navy-950);
  color: #cbd5e1;
  padding: 1.85rem 0;
  font-size: 0.88rem;
}

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

.footer strong {
  color: var(--white);
  display: block;
  margin-bottom: 0.25rem;
}

.footer p {
  margin: 0;
  color: #94a3b8;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-links a:hover {
  color: var(--cyan-400);
}

/* Responsive */
@media (max-width: 980px) {
  .cards-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .hero-inner,
  .services-layout,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--white);
    border-bottom: 1px solid var(--slate-200);
    padding: 1rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    box-shadow: var(--shadow-md);
  }

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

  .cards-4,
  .two-col,
  .contact-row {
    grid-template-columns: 1fr;
  }

  .topbar {
    display: none;
  }
}