/* ==========================================================================
   Fonts
   ========================================================================== */

@font-face {
  font-family: "Open Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("assets/fonts/open-sans-400.woff2") format("woff2");
}

@font-face {
  font-family: "Open Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("assets/fonts/open-sans-600.woff2") format("woff2");
}

@font-face {
  font-family: "Open Sans";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("assets/fonts/open-sans-700.woff2") format("woff2");
}

@font-face {
  font-family: "Noto Sans Thai";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("assets/fonts/noto-sans-thai-400.woff2") format("woff2");
  size-adjust: 110%;
  unicode-range: U+02D7, U+0303, U+0331, U+0E01-0E5B, U+200C-200D, U+25CC;
}

@font-face {
  font-family: "Noto Sans Thai";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("assets/fonts/noto-sans-thai-600.woff2") format("woff2");
  size-adjust: 110%;
  unicode-range: U+02D7, U+0303, U+0331, U+0E01-0E5B, U+200C-200D, U+25CC;
}

@font-face {
  font-family: "Noto Sans Thai";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("assets/fonts/noto-sans-thai-700.woff2") format("woff2");
  size-adjust: 110%;
  unicode-range: U+02D7, U+0303, U+0331, U+0E01-0E5B, U+200C-200D, U+25CC;
}

/* ==========================================================================
   Tokens
   ========================================================================== */

:root {
  /* Color: logo navy carries the page; teal signal appears on dark only */
  --blue: #1d2e5e;
  --blue-deep: #142249;
  --blue-line: #34477d;
  --ink: #151a24;
  --ink-soft: #222937;
  --muted: #5b6474;
  --surface: #ffffff;
  --surface-alt: #f1f3f7;
  --border: #d5dae3;
  --signal: #63d2dc;
  --on-dark: #ffffff;
  --on-dark-muted: rgb(255 255 255 / 0.8);
  --on-dark-faint: rgb(255 255 255 / 0.32);
  --error: #b42318;

  /* Type */
  --font: "Open Sans", "Noto Sans Thai", system-ui, -apple-system, "Segoe UI", sans-serif;
  --fs-h1: clamp(2.25rem, 1.5rem + 3vw, 3.5rem);
  --fs-h2: clamp(2rem, 1.4rem + 2.4vw, 3rem);
  --fs-h3: clamp(1.375rem, 1.1rem + 1vw, 1.75rem);
  --fs-h4: clamp(1.125rem, 1rem + 0.5vw, 1.25rem);
  --fs-lead: clamp(1.125rem, 1rem + 0.5vw, 1.25rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --lh-body: 1.6;
  --lh-tight: 1.15;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 112px;
  --section-y: clamp(var(--space-8), 7vw, var(--space-9));

  /* Layout */
  --container: 1200px;
  --gutter: clamp(16px, 4vw, 48px);
  --edge: max(var(--gutter), calc((100vw - var(--container)) / 2));
  --header-h: 80px;
  --radius: 2px;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --slide-duration: 10s;

  /* Layers */
  --z-content: 1;
  --z-rail: 2;
  --z-header: 100;
  --z-hint: 105;
  --z-nav: 110;
  --z-skip: 200;
}

/* ==========================================================================
   Base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
}

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

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: var(--z-skip);
  padding: var(--space-2) var(--space-4);
  color: var(--on-dark);
  background: var(--ink);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

.section-title {
  font-size: var(--fs-h2);
  font-weight: 700;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: var(--space-3) var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius);
  font: inherit;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.btn--light {
  color: var(--ink);
  background: var(--on-dark);
}

.btn--light:hover {
  background: var(--signal);
}

.btn--outline {
  color: var(--on-dark);
  border-color: var(--on-dark-muted);
}

.btn--outline:hover {
  color: var(--ink);
  background: var(--on-dark);
  border-color: var(--on-dark);
}

.btn--primary {
  color: var(--on-dark);
  background: var(--blue);
}

.btn--primary:hover {
  background: var(--blue-deep);
}

.btn--outline-dark {
  color: var(--blue);
  border-color: var(--blue);
}

.btn--outline-dark:hover {
  color: var(--on-dark);
  background: var(--blue);
}

.hero .btn:focus-visible,
.contact__intro a:focus-visible,
.contact__direct a:focus-visible {
  outline-color: var(--signal);
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-header);
  color: var(--on-dark);
  transition: background-color 0.35s var(--ease-out), color 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.header.is-solid {
  color: var(--ink);
  background: var(--surface);
  box-shadow: 0 1px 0 var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.header__brand {
  position: relative;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  flex: none;
}

.header__logo {
  display: block;
  width: 196px;
  height: auto;
}

.header__logo--dark,
.header.is-solid .header__logo--light {
  display: none;
}

.header.is-solid .header__logo--dark {
  display: block;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav__link {
  position: relative;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.nav__link:not(.nav__link--cta)::after {
  content: "";
  position: absolute;
  inset: auto 0 -6px;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease-out);
}

.nav__link:not(.nav__link--cta):hover::after,
.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav__link--cta {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  border: 1px solid currentColor;
  border-radius: var(--radius);
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}

.nav__link--cta:hover {
  color: var(--ink);
  background: var(--on-dark);
  border-color: var(--on-dark);
}

.header.is-solid .nav__link--cta {
  color: var(--on-dark);
  background: var(--blue);
  border-color: var(--blue);
}

.header.is-solid .nav__link--cta:hover {
  background: var(--blue-deep);
  border-color: var(--blue-deep);
}

.nav__lang {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-small);
  font-weight: 600;
}

.nav__lang-sep {
  opacity: 0.5;
}

.nav__lang-link {
  opacity: 0.7;
  text-decoration: none;
  transition: opacity 0.25s var(--ease-out);
}

.nav__lang-link:hover {
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.header__toggle {
  display: none;
}

@media (max-width: 1000px) {
  .header__logo {
    width: 160px;
  }

  .header__toggle {
    position: relative;
    z-index: var(--z-nav);
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    margin-right: calc(-1 * var(--space-3));
    padding: 0;
    color: inherit;
    background: none;
    border: 0;
    cursor: pointer;
  }

  .header__toggle-bars,
  .header__toggle-bars::before,
  .header__toggle-bars::after {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    transition: transform 0.3s var(--ease-out), background-color 0.3s var(--ease-out);
  }

  .header__toggle-bars {
    position: relative;
  }

  .header__toggle-bars::before,
  .header__toggle-bars::after {
    content: "";
    position: absolute;
    left: 0;
  }

  .header__toggle-bars::before {
    top: -7px;
  }

  .header__toggle-bars::after {
    top: 7px;
  }

  .header__toggle[aria-expanded="true"] {
    color: var(--on-dark);
  }

  .header__toggle[aria-expanded="true"] .header__toggle-bars {
    background: transparent;
  }

  .header__toggle[aria-expanded="true"] .header__toggle-bars::before {
    transform: translateY(7px) rotate(45deg);
  }

  .header__toggle[aria-expanded="true"] .header__toggle-bars::after {
    transform: translateY(-7px) rotate(-45deg);
  }

  .js .nav {
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-nav) - 1);
    display: flex;
    align-items: center;
    padding: var(--header-h) var(--gutter) var(--space-8);
    color: var(--on-dark);
    background: var(--blue);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s var(--ease-out), visibility 0s 0.35s;
  }

  .js .nav.is-open {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.35s var(--ease-out), visibility 0s;
  }

  .js .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-5);
  }

  .js .nav__link {
    font-size: var(--fs-h3);
  }

  .js .nav__lang {
    margin-top: var(--space-3);
    font-size: var(--fs-body);
  }

  .js .header.is-solid .nav__link--cta,
  .js .nav__link--cta {
    color: var(--ink);
    background: var(--on-dark);
    border-color: var(--on-dark);
  }

  .header:has(.nav.is-open) .header__logo--light {
    display: block;
  }

  .header:has(.nav.is-open) .header__logo--dark {
    display: none;
  }

  .header.is-solid:has(.nav.is-open) {
    background: transparent;
    box-shadow: none;
  }
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  display: grid;
  min-height: max(640px, 100svh);
  color: var(--on-dark);
  background: var(--ink);
  overflow: hidden;
}

.hero__slides {
  display: grid;
}

.hero__slide {
  position: relative;
  grid-area: 1 / 1;
  display: flex;
  align-items: flex-end;
  padding-block: calc(var(--header-h) + var(--space-7)) 160px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1s var(--ease-out), visibility 0s 1s;
}

.hero__slide.is-active {
  opacity: 1;
  visibility: visible;
  transition: opacity 1s var(--ease-out), visibility 0s;
}

.hero__slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgb(21 26 36 / 0.6) 0%, rgb(21 26 36 / 0) 22%),
    linear-gradient(90deg, rgb(21 26 36 / 0.88) 0%, rgb(21 26 36 / 0.64) 45%, rgb(21 26 36 / 0.1) 80%),
    linear-gradient(0deg, rgb(21 26 36 / 0.7) 0%, rgb(21 26 36 / 0) 40%);
}

.hero__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__content {
  position: relative;
  z-index: var(--z-content);
}

.hero__title {
  max-width: 22ch;
  font-size: var(--fs-h1);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero__text {
  max-width: 56ch;
  margin-top: var(--space-5);
  font-size: var(--fs-lead);
  color: var(--on-dark-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.hero__rail {
  position: absolute;
  inset: auto 0 var(--space-6);
  z-index: var(--z-rail);
  display: flex;
  align-items: flex-end;
  gap: var(--space-5);
}

.hero__tabs {
  display: grid;
  flex: 1;
  grid-auto-columns: 1fr;
  grid-auto-flow: column;
  gap: var(--space-5);
}

.hero__tab {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-3) 0 0;
  font: inherit;
  font-size: var(--fs-small);
  font-weight: 600;
  text-align: left;
  color: var(--on-dark-muted);
  background: none;
  border: 0;
  cursor: pointer;
  transition: color 0.3s var(--ease-out);
}

.hero__tab:hover,
.hero__tab.is-active {
  color: var(--on-dark);
}

.hero__tab:focus-visible,
.hero__pause:focus-visible {
  outline-color: var(--signal);
}

.hero__track {
  display: block;
  height: 2px;
  background: var(--on-dark-faint);
  overflow: hidden;
}

.hero__fill {
  display: block;
  height: 100%;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left;
}

.hero__tab.is-active .hero__fill {
  animation: progress var(--slide-duration) linear forwards;
}

.hero.is-paused .hero__fill,
.hero:has(.hero__slide.is-active .hero__content > :hover, .hero__tab:hover, :focus-visible) .hero__fill {
  animation-play-state: paused;
}

.hero__pause {
  display: grid;
  flex: none;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--on-dark);
  background: none;
  border: 1px solid var(--on-dark-faint);
  border-radius: 50%;
  cursor: pointer;
  transition: border-color 0.25s var(--ease-out);
}

.hero__pause:hover {
  border-color: var(--on-dark);
}

.hero__pause-icon {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.hero__pause .icon-play,
.hero.is-paused .hero__pause .icon-pause {
  display: none;
}

.hero.is-paused .hero__pause .icon-play {
  display: block;
}

.hero__rail {
  visibility: hidden;
}

.js .hero__rail {
  visibility: visible;
}

@keyframes progress {
  to {
    transform: scaleX(1);
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
}

@keyframes settle {
  from {
    transform: scale(1.08);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .hero__slide.is-active .hero__image {
    animation: settle 12s var(--ease-out) both;
  }

  .hero__slide.is-active .hero__title,
  .hero__slide.is-active .hero__text,
  .hero__slide.is-active .hero__actions {
    animation: rise 0.9s var(--ease-out) both;
  }

  .hero__slide.is-active .hero__title {
    animation-delay: 0.15s;
  }

  .hero__slide.is-active .hero__text {
    animation-delay: 0.3s;
  }

  .hero__slide.is-active .hero__actions {
    animation-delay: 0.45s;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__tab.is-active .hero__fill {
    animation: none;
    transform: scaleX(1);
  }

  .hero__pause {
    display: none;
  }
}

@media (max-width: 760px) {
  .hero__slide {
    padding-bottom: 104px;
  }

  .hero__slide::after {
    background: linear-gradient(0deg, rgb(21 26 36 / 0.9) 0%, rgb(21 26 36 / 0.72) 55%, rgb(21 26 36 / 0.35) 100%);
  }

  .hero__text {
    font-size: var(--fs-body);
  }

  .hero__rail {
    bottom: var(--space-5);
    align-items: center;
  }

  .hero__tabs {
    gap: var(--space-2);
  }

  .hero__tab {
    padding-block: var(--space-4);
  }

  .hero__label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }
}

/* ==========================================================================
   Equipment
   ========================================================================== */

.equipment {
  padding-block: var(--section-y);
}

.equipment__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

.equipment__intro {
  display: grid;
  gap: var(--space-5);
}

.equipment__text {
  max-width: 56ch;
  color: var(--muted);
}

.equipment__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.equipment__facts {
  margin: 0;
  border-top: 2px solid var(--blue);
}

.equipment__fact {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.equipment__fact dt {
  color: var(--muted);
}

.equipment__fact dd {
  margin: 0;
  font-weight: 600;
}

.equipment__process {
  margin-top: var(--space-9);
}

.equipment__process-title {
  font-size: var(--fs-h3);
  font-weight: 700;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps__item {
  display: grid;
  align-content: start;
  gap: var(--space-2);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  color: var(--muted);
  counter-increment: step;
}

.steps__item::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-bottom: var(--space-2);
  font-weight: 700;
  color: var(--on-dark);
  background: var(--blue);
  border-radius: 50%;
}

.steps__title {
  font-size: var(--fs-h4);
  font-weight: 700;
  color: var(--ink);
}

@media (max-width: 960px) {
  .equipment__inner {
    grid-template-columns: 1fr;
    gap: var(--space-7);
  }

  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6) var(--space-5);
  }
}

@media (max-width: 560px) {
  .equipment__fact {
    grid-template-columns: 7rem 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   About
   ========================================================================== */

.about {
  position: relative;
  padding-block: var(--section-y);
  color: var(--on-dark);
  background: var(--blue);
  overflow: hidden;
}

.about__mark {
  position: absolute;
  bottom: -18%;
  left: calc(var(--edge) - var(--space-7));
  width: min(40vw, 520px);
  height: auto;
  fill: none;
  stroke: var(--blue-line);
  stroke-width: 1.5;
}

.about__mark path {
  vector-effect: non-scaling-stroke;
}

.about__inner {
  position: relative;
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--space-8);
  align-items: start;
}

.about__title {
  font-size: var(--fs-h2);
  font-weight: 700;
}

.about__body {
  display: grid;
  gap: var(--space-5);
  max-width: 62ch;
  color: var(--on-dark-muted);
}

.about__belief {
  padding-top: var(--space-5);
  border-top: 1px solid var(--blue-line);
  font-size: var(--fs-h4);
  font-weight: 600;
  line-height: 1.45;
  color: var(--on-dark);
}

.about__more {
  justify-self: start;
  font-weight: 600;
  color: var(--on-dark);
  text-decoration: none;
}

.about__more span {
  display: inline-block;
  transition: transform 0.3s var(--ease-out);
}

.about__more:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.about__more:hover span {
  transform: translateX(4px);
}

.about__more:focus-visible {
  outline-color: var(--signal);
}

@media (max-width: 960px) {
  .about__inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .about__mark {
    display: none;
  }
}

/* ==========================================================================
   Services
   ========================================================================== */

.services {
  padding-block: var(--section-y);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-8) var(--space-6);
  margin-top: var(--space-7);
}

.service--narrow {
  grid-column: span 5;
}

.service--wide {
  grid-column: span 7;
}

.service {
  display: flex;
  flex-direction: column;
}

.service__media {
  height: 300px;
  overflow: hidden;
  background: var(--surface-alt);
}

.service__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease-out);
}

.service:hover .service__media img {
  transform: scale(1.04);
}

.service__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding-top: var(--space-5);
}

.service__title {
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--blue);
}

.service__subtitle {
  margin-top: var(--space-1);
  font-weight: 600;
}

.service__text {
  max-width: 62ch;
  margin-top: var(--space-3);
  color: var(--muted);
}

.service__link {
  align-self: flex-start;
  margin-top: auto;
  padding-top: var(--space-5);
  font-weight: 600;
  color: var(--blue);
  text-decoration: none;
}

.service__link span {
  display: inline-block;
  transition: transform 0.3s var(--ease-out);
}

.service__link:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.service__link:hover span {
  transform: translateX(4px);
}

.statement {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--space-8);
  margin-top: var(--space-10);
  padding-top: var(--space-7);
  border-top: 1px solid var(--border);
}

.statement__title {
  font-size: var(--fs-h2);
  font-weight: 700;
  color: var(--blue);
}

.statement__text {
  max-width: 62ch;
  font-size: var(--fs-lead);
  color: var(--muted);
}

@media (max-width: 960px) {
  .services__grid {
    grid-template-columns: 1fr;
    gap: var(--space-7);
  }

  .service--narrow,
  .service--wide {
    grid-column: auto;
  }

  .service__media {
    height: auto;
    aspect-ratio: 16 / 9;
  }

  .statement {
    grid-template-columns: 1fr;
    gap: var(--space-5);
    margin-top: var(--space-9);
  }
}

/* ==========================================================================
   Approach
   ========================================================================== */

.approach {
  padding-top: var(--section-y);
  background: var(--surface-alt);
}

.approach .section-title {
  margin-bottom: var(--space-7);
}

.approach__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 560px;
}

.approach__media {
  position: relative;
  min-height: 360px;
  overflow: hidden;
}

.approach__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.approach__text {
  display: grid;
  align-content: center;
  gap: var(--space-4);
  padding: var(--space-9) var(--edge) var(--space-9) var(--space-9);
  color: var(--muted);
}

.approach__text > * {
  max-width: 56ch;
}

.approach__row--reverse .approach__media {
  order: 2;
}

.approach__row--reverse .approach__text {
  padding: var(--space-9) var(--space-9) var(--space-9) var(--edge);
}

.approach__title {
  margin-bottom: var(--space-2);
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--ink);
}

@media (max-width: 960px) {
  .approach__row {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .approach__media {
    aspect-ratio: 16 / 10;
    min-height: 0;
  }

  .approach__row--reverse .approach__media {
    order: 0;
  }

  .approach__text,
  .approach__row--reverse .approach__text {
    padding: var(--space-7) var(--gutter) var(--space-8);
  }
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--surface);
}

.contact__panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-8);
  padding: var(--section-y) var(--space-9) var(--space-8) var(--edge);
  color: var(--on-dark-muted);
  background: var(--ink);
  overflow: hidden;
}

.contact__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.contact__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: var(--z-content);
  background:
    linear-gradient(180deg, rgb(21 26 36 / 0.9) 0%, rgb(21 26 36 / 0.55) 55%, rgb(21 26 36 / 0.85) 100%);
}

.contact__intro,
.contact__direct {
  position: relative;
  z-index: var(--z-rail);
}

.contact__intro {
  display: grid;
  gap: var(--space-5);
  max-width: 48ch;
}

.contact__title {
  font-size: var(--fs-h2);
  font-weight: 700;
  color: var(--on-dark);
}

.contact__lead {
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--on-dark);
}

.contact__direct {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--on-dark-faint);
}

.contact__qr {
  flex: none;
  width: 112px;
  height: 112px;
  padding: var(--space-2);
  background: var(--on-dark);
  border-radius: var(--radius);
}

.contact__channels-title {
  margin-bottom: var(--space-2);
  font-weight: 600;
  color: var(--on-dark);
}

.contact__list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-1) var(--space-4);
  margin: 0;
}

.contact__list dd {
  margin: 0;
}

.contact__direct a {
  font-weight: 600;
  color: var(--on-dark);
  text-underline-offset: 4px;
}

.contact__direct a:hover {
  color: var(--signal);
}

.contact__form-wrap {
  display: flex;
  align-items: center;
  padding: var(--section-y) var(--edge) var(--section-y) var(--space-9);
}

.contact__form-wrap .form {
  width: 100%;
  max-width: 560px;
}

@media (max-width: 960px) {
  .contact {
    grid-template-columns: 1fr;
  }

  .contact__panel {
    gap: var(--space-7);
    padding: var(--space-9) var(--gutter) var(--space-7);
  }

  .contact__form-wrap {
    padding: var(--space-8) var(--gutter);
  }
}

@media (max-width: 760px) {
  .contact__qr {
    display: none;
  }
}

/* ==========================================================================
   Form
   ========================================================================== */

.form {
  display: grid;
  gap: var(--space-5);
  color: var(--ink);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.form__field {
  display: grid;
  gap: var(--space-2);
}

.form__label {
  font-size: var(--fs-small);
  font-weight: 600;
}

.form__req {
  color: var(--blue);
}

.form__input {
  width: 100%;
  min-height: 48px;
  padding: var(--space-3) var(--space-4);
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}

.form__input:hover {
  border-color: var(--muted);
}

.form__input:focus {
  border-color: var(--blue);
  outline: none;
  box-shadow: 0 0 0 3px rgb(29 46 94 / 0.2);
}

.form__input[aria-invalid="true"] {
  border-color: var(--error);
}

.form__select {
  appearance: none;
  padding-right: var(--space-7);
  background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%231d2e5e' stroke-width='2'/%3E%3C/svg%3E") no-repeat right var(--space-4) center;
}

.form__textarea {
  resize: vertical;
}

.form__honey {
  position: absolute;
  left: -9999px;
}

.form__note {
  font-size: var(--fs-small);
  color: var(--muted);
}

.form__note a {
  color: var(--blue);
  text-underline-offset: 3px;
}

.form__submit {
  justify-self: start;
}

.form__submit[disabled] {
  opacity: 0.6;
  cursor: progress;
}

.form__status:empty {
  display: none;
}

.form__status {
  font-weight: 600;
  color: var(--blue);
}

.form__status.is-error {
  color: var(--error);
}

@media (max-width: 560px) {
  .form__row {
    grid-template-columns: 1fr;
  }

  .form__submit {
    justify-self: stretch;
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  font-size: var(--fs-small);
  color: var(--on-dark-muted);
  background: var(--ink-soft);
}

.footer a {
  text-decoration: none;
}

.footer a:hover {
  color: var(--on-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer a:focus-visible {
  outline-color: var(--signal);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  padding-block: var(--space-7);
  background: linear-gradient(rgb(255 255 255 / 0.12), rgb(255 255 255 / 0.12)) no-repeat center bottom / calc(100% - 2 * var(--gutter)) 1px;
}

.footer__col--brand {
  display: grid;
  justify-items: start;
  align-content: start;
  gap: var(--space-4);
}

.footer__brand {
  display: block;
}

.footer__logo {
  display: block;
  width: 168px;
  height: auto;
}

.footer__motto {
  max-width: 24ch;
}

.footer__socials {
  display: flex;
  gap: var(--space-2);
}

.footer__social {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  color: var(--on-dark);
  border: 1px solid var(--on-dark-faint);
  border-radius: var(--radius);
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out);
}

.footer__social svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.footer .footer__social:hover {
  color: var(--ink);
  background: var(--on-dark);
}

.footer__heading {
  margin-bottom: var(--space-3);
  font-weight: 700;
  color: var(--on-dark);
}

.footer__address {
  font-style: normal;
}

.footer__reg {
  margin-top: var(--space-3);
}

.footer__list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2) var(--space-4);
  margin: 0;
}

.footer__list dt {
  color: var(--on-dark);
}

.footer__list dd {
  margin: 0;
  white-space: nowrap;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-4);
}

@media (max-width: 1100px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-7) var(--space-6);
  }
}

@media (max-width: 900px) {
  .footer__list {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .footer__list dd {
    margin-bottom: var(--space-3);
  }
}

@media (max-width: 480px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   About page
   ========================================================================== */

.page-hero {
  position: relative;
  padding-block: calc(var(--header-h) + var(--space-9)) var(--space-9);
  color: var(--on-dark);
  background: var(--blue);
  overflow: hidden;
}

.page-hero__mark,
.cta__mark {
  position: absolute;
  height: auto;
  fill: none;
  stroke: var(--blue-line);
  stroke-width: 1.5;
}

.page-hero__mark path,
.cta__mark path {
  vector-effect: non-scaling-stroke;
}

.page-hero__mark {
  right: calc(var(--edge) - var(--space-7));
  bottom: -22%;
  width: min(48vw, 640px);
}

.page-hero__inner {
  position: relative;
  display: grid;
  gap: var(--space-5);
}

.page-hero__title {
  max-width: 20ch;
  font-size: var(--fs-h1);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-hero__tagline {
  font-size: var(--fs-lead);
  color: var(--signal);
}

.about-intro {
  padding-block: var(--section-y);
}

.about-intro__inner {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--space-8);
  align-items: start;
}

.about-intro__text {
  display: grid;
  gap: var(--space-5);
  max-width: 64ch;
  color: var(--muted);
}

.about-intro__lead {
  font-size: var(--fs-h4);
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

.facts {
  padding: var(--space-6);
  background: var(--surface-alt);
  border-top: 2px solid var(--blue);
}

.facts__title {
  font-size: var(--fs-h4);
  font-weight: 700;
  color: var(--blue);
}

.facts__list {
  margin: var(--space-4) 0 0;
}

.facts__row {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: var(--space-4);
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--border);
}

.facts__row:last-child {
  border-bottom: 0;
}

.facts__row dt {
  color: var(--muted);
}

.facts__row dd {
  margin: 0;
  font-weight: 600;
}

.principles {
  padding-block: var(--section-y);
  background: var(--surface-alt);
}

.principles__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-7);
}

.principle {
  display: grid;
  align-content: start;
  gap: var(--space-3);
  padding-top: var(--space-5);
  border-top: 2px solid var(--blue);
  color: var(--muted);
}

.principle__title {
  font-size: var(--fs-h4);
  font-weight: 700;
  color: var(--ink);
}

.offer {
  padding-block: var(--section-y);
}

.offer__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-7) var(--space-8);
  margin-top: var(--space-7);
}

.offer__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
}

.offer__title {
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--blue);
}

.offer__text {
  max-width: 60ch;
  color: var(--muted);
}

.offer__link {
  align-self: flex-start;
  margin-top: auto;
  padding-top: var(--space-2);
  font-weight: 600;
  color: var(--blue);
  text-decoration: none;
}

.offer__link span {
  display: inline-block;
  transition: transform 0.3s var(--ease-out);
}

.offer__link:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.offer__link:hover span {
  transform: translateX(4px);
}

.direction {
  background: var(--surface-alt);
}

.direction .approach__media img {
  object-position: center 75%;
}

.direction__title {
  margin-bottom: var(--space-2);
  font-size: var(--fs-h2);
  font-weight: 700;
  color: var(--ink);
}

.cta {
  position: relative;
  padding-block: var(--section-y);
  color: var(--on-dark-muted);
  background: var(--blue);
  overflow: hidden;
}

.cta__mark {
  right: calc(var(--edge) - var(--space-7));
  bottom: -40%;
  width: min(40vw, 520px);
}

.cta__inner {
  position: relative;
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--space-8);
  align-items: center;
}

.cta__text {
  display: grid;
  gap: var(--space-4);
  max-width: 60ch;
}

.cta__title {
  font-size: var(--fs-h2);
  font-weight: 700;
  color: var(--on-dark);
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-3);
}

.cta .btn:focus-visible {
  outline-color: var(--signal);
}

@media (max-width: 960px) {
  .about-intro__inner,
  .cta__inner {
    grid-template-columns: 1fr;
    gap: var(--space-7);
  }

  .principles__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .cta__actions {
    justify-content: flex-start;
  }
}

@media (max-width: 760px) {
  .offer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .page-hero__mark {
    width: 80vw;
    opacity: 0.6;
  }
}

@media (max-width: 560px) {
  .facts {
    padding: var(--space-5);
  }

  .facts__row {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

/* ==========================================================================
   Language hint
   ========================================================================== */

.lang-hint {
  position: fixed;
  top: calc(var(--header-h) + var(--space-3));
  right: var(--edge);
  z-index: var(--z-hint);
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: var(--space-4);
  width: min(520px, calc(100vw - 2 * var(--gutter)));
  padding: var(--space-3) var(--space-3) var(--space-3) var(--space-4);
  color: var(--on-dark);
  background: rgb(21 26 36 / 0.94);
  border: 1px solid rgb(255 255 255 / 0.14);
  border-radius: var(--radius);
  box-shadow: 0 18px 48px rgb(21 26 36 / 0.32);
  opacity: 0;
  transform: translateY(-12px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}

.lang-hint.is-visible {
  opacity: 1;
  transform: none;
}

.lang-hint__badge {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--signal);
  border: 1px solid var(--signal);
  border-radius: 50%;
}

.lang-hint__body {
  display: grid;
  min-width: 0;
}

.lang-hint__title {
  font-weight: 600;
  line-height: 1.4;
}

.lang-hint__note {
  font-size: var(--fs-small);
  color: var(--on-dark-muted);
}

.lang-hint__action {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 40px;
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-small);
  font-weight: 600;
  white-space: nowrap;
  color: var(--ink);
  text-decoration: none;
  background: var(--on-dark);
  border-radius: var(--radius);
  transition: background-color 0.25s var(--ease-out);
}

.lang-hint__action:hover {
  background: var(--signal);
}

.lang-hint__close {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  color: var(--on-dark-muted);
  background: none;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  transition: color 0.25s var(--ease-out), background-color 0.25s var(--ease-out);
}

.lang-hint__close:hover {
  color: var(--on-dark);
  background: rgb(255 255 255 / 0.1);
}

.lang-hint__close svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
}

.lang-hint a:focus-visible,
.lang-hint button:focus-visible {
  outline-color: var(--signal);
}

@media (max-width: 560px) {
  .lang-hint {
    grid-template-columns: auto 1fr auto;
    gap: var(--space-3);
    right: var(--gutter);
  }

  .lang-hint__action {
    grid-column: 1 / -1;
    justify-content: center;
  }

  .lang-hint__close {
    grid-row: 1;
    grid-column: 3;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lang-hint {
    transform: none;
  }
}

/* ==========================================================================
   Legal page
   ========================================================================== */

.legal {
  padding-block: calc(var(--header-h) + var(--space-8)) var(--section-y);
}

.legal__inner {
  max-width: 72ch;
}

.legal__title {
  font-size: var(--fs-h1);
  font-weight: 700;
  color: var(--blue);
}

.legal__updated {
  margin-top: var(--space-3);
  color: var(--muted);
}

.legal h2 {
  margin-top: var(--space-7);
  margin-bottom: var(--space-3);
  font-size: var(--fs-h4);
  font-weight: 700;
}

.legal p,
.legal ul {
  margin-bottom: var(--space-4);
  color: var(--muted);
}

.legal ul {
  padding-left: var(--space-5);
}

.legal a {
  color: var(--blue);
  text-underline-offset: 3px;
}

/* ==========================================================================
   Thai
   Thai stacks vowels and tone marks above and below the letters, so it needs
   more line height and no negative tracking. The Thai font is scaled up 110%
   (size-adjust above) so its letters match the height of Open Sans lowercase.
   ========================================================================== */

html:lang(th) {
  --font: "Noto Sans Thai", "Open Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --lh-body: 1.75;
  --lh-tight: 1.4;

  /* One step smaller than English: the 110% Thai size-adjust already enlarges headings */
  --fs-h1: clamp(2.125rem, 1.4rem + 2.8vw, 3.25rem);
  --fs-h2: clamp(1.875rem, 1.3rem + 2.2vw, 2.75rem);
  --fs-h3: clamp(1.25rem, 1rem + 0.9vw, 1.625rem);

  /* Thai strokes are thinner than Open Sans, so body greys go a step darker */
  --muted: #474f5e;
  --on-dark-muted: rgb(255 255 255 / 0.88);
}

html:lang(th) :is(h1, h2, h3, h4, .hero__title) {
  letter-spacing: 0;
}

html:lang(th) :is(h1, h2, h3, h4)[lang="en"] {
  line-height: 1.15;
  letter-spacing: -0.01em;
}

html:lang(th) .btn {
  line-height: 1.4;
}

html:lang(th) .about__belief {
  line-height: 1.6;
}

html:lang(th) .contact__intro {
  max-width: none;
}

.nowrap {
  white-space: nowrap;
}

/* ==========================================================================
   Scroll reveals (enhancement only: content is visible without support)
   ========================================================================== */

@keyframes reveal-rise {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
}

@keyframes reveal-wipe {
  from {
    clip-path: inset(0 100% 0 0);
  }
}

@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .reveal {
      animation: reveal-rise linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 70%;
    }

    .reveal-wipe {
      animation: reveal-wipe linear both;
      animation-timeline: view();
      animation-range: entry 10% cover 40%;
    }

    .approach__row--reverse .reveal-wipe {
      animation-name: reveal-wipe-left;
    }
  }
}

@keyframes reveal-wipe-left {
  from {
    clip-path: inset(0 0 0 100%);
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}