/* Plasma Innovations — shared styles (tokens from Figma "Plasma-Innovation", page 229:15478).
   Page-specific rules live in assets/css/pages/<page>.css (linked by the page's front matter). */
:root {
  --red: #b02a31;          /* primary buttons, accents */
  --red-dark: #8e0b0b;     /* Contact us, tags, links */
  --purple: #9747ff;       /* section pills */
  --purple-2: #7133ea;     /* active language */
  --ink: #121212;          /* header, dark cards */
  --bg: #f9f9f6;           /* page background */
  --muted: #acacac;
  --line: #d4d4d4;
  --dark-grad: linear-gradient(180deg, #000 0%, #1f114a 100%);
  --font-en: "IBM Plex Sans", "Prompt", system-ui, sans-serif;
  --font-th: "Prompt", "IBM Plex Sans", system-ui, sans-serif;
  --container: 1248px;
  --gutter: clamp(16px, 4vw, 48px);
  --header-h: 112px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: #000;
  font-family: var(--font-th); font-weight: 300; font-size: 18px; line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { margin: 0; line-height: 1.15; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
nb { white-space: nowrap; }          /* Thai word wrapper added by tools/build.py */
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 100; background: #fff; padding: 8px 12px; }
.skip-link:focus { left: 8px; top: 8px; }
:focus-visible { outline: 2px solid var(--purple); outline-offset: 2px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.container { width: 100%; max-width: calc(var(--container) + 2 * var(--gutter)); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: clamp(56px, 7vw, 96px) 0; }
.section--dark { background: var(--dark-grad); color: #fff; }
.section--ink { background: var(--ink); color: #fff; }
.center { text-align: center; }

/* ---------- type ---------- */
.en { font-family: var(--font-en); }
.h-display { font-family: var(--font-en); font-weight: 700; font-size: clamp(30px, 4.2vw, 50px); line-height: 1.1; text-transform: uppercase; }
.h-section { font-family: var(--font-en); font-weight: 700; font-size: clamp(28px, 3.2vw, 40px); line-height: 1.2; }
.h-section .accent, .h-display .accent { color: var(--red); }
.h-sub-th { font-family: var(--font-th); font-weight: 600; font-size: clamp(19px, 2vw, 25px); color: var(--red); margin-top: 4px; }
.kicker { font-family: var(--font-th); font-weight: 700; font-size: 15px; color: var(--red-dark); letter-spacing: .02em; text-transform: uppercase; }
.lead { font-size: clamp(17px, 1.5vw, 20px); }
.rule { width: 100px; height: 3px; background: var(--red); border: 0; margin: 20px 0; }
.pill { display: inline-block; background: var(--purple); color: #fff; font: 600 15px/24px var(--font-th); padding: 0 12px; }
.tag { display: inline-block; background: var(--red-dark); color: #fff; font: 500 13px/23px var(--font-th); padding: 0 8px; }
.cat { color: var(--red); font: 600 15px/1.4 var(--font-th); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 53px; padding: 10px 24px; border-radius: 6px; border: 2px solid var(--red);
  background: var(--red); color: #fff; font: 400 20px/1.39 var(--font-th); text-decoration: none;
  box-shadow: 0 2px 4px rgba(0,0,0,.25); transition: filter .15s, transform .15s; white-space: nowrap;
}
.btn:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn--light { background: var(--bg); border-color: var(--bg); color: var(--red-dark); }
.btn--outline { background: transparent; border: 1px solid #fff; color: #fff; }
.btn--square { border-radius: 0; }
.btn--sm { min-height: 40px; font-size: 16px; padding: 6px 16px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px 16px; }
.link-arrow { display: inline-flex; align-items: center; gap: 10px; font: 700 20px/1.5 var(--font-th); color: var(--red-dark); text-decoration: none; text-transform: uppercase; }
.link-arrow::after { content: "→"; font-weight: 400; }
.link-arrow:hover { text-decoration: underline; }
.link-arrow--muted { color: var(--muted); font-weight: 500; }
.read-more { display: inline-flex; align-items: center; gap: 4px; color: var(--red); font: 300 13px/1 var(--font-th); text-decoration: none; }
.read-more::after { content: "→"; }

/* ---------- header ---------- */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--ink); color: #fff; }
.header__inner { max-width: 1440px; margin: 0 auto; height: var(--header-h); display: flex; align-items: center; gap: 24px; padding: 0 clamp(16px, 5.9vw, 85px); }
.brand img { width: clamp(180px, 19.5vw, 280px); height: auto; }
.main-nav { margin-left: auto; display: flex; align-items: center; gap: 20px; }
.main-nav__list { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: clamp(12px, 1.4vw, 20px); }
.main-nav__list > li { position: relative; display: flex; align-items: center; }
.main-nav a { font: 500 15px/25px var(--font-en); color: var(--line); text-decoration: none; white-space: nowrap; border-bottom: 1px solid transparent; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: #fff; border-bottom-color: var(--red); }
.sub-toggle { width: 14px; height: 25px; margin-left: 4px; padding: 0; border: 0; cursor: pointer; background: url("../img/common/chevron.svg") center/9px auto no-repeat; transform: rotate(90deg); opacity: .8; }
.sub { list-style: none; margin: 0; padding: 8px 0; position: absolute; top: 100%; left: -16px; min-width: 220px; background: var(--ink); border-top: 2px solid var(--red); box-shadow: 0 10px 24px rgba(0,0,0,.4); opacity: 0; visibility: hidden; transform: translateY(6px); transition: .15s; }
.sub a { display: block; padding: 8px 16px; border: 0; }
.has-sub:hover > .sub, .has-sub:focus-within > .sub, .has-sub.is-open > .sub { opacity: 1; visibility: visible; transform: none; }
.main-nav__aside { display: flex; align-items: center; gap: 20px; }
.btn-contact { display: inline-block; background: var(--red-dark); color: #fff !important; font: 500 15px/28px var(--font-en); padding: 0 8px; text-decoration: none; border: 0 !important; white-space: nowrap; }
.btn-contact:hover { filter: brightness(1.2); }
.lang { display: flex; gap: 1px; }
.lang__item { width: 20px; height: 20px; display: grid; place-items: center; font: 600 12px/1 var(--font-en); color: #fff; background: var(--ink); }
.lang__item.is-active { background: var(--purple-2); }
.nav-toggle { display: none; margin-left: auto; width: 44px; height: 44px; background: none; border: 0; padding: 10px; cursor: pointer; }
.nav-toggle span { display: block; height: 2px; background: #fff; margin: 5px 0; transition: .2s; }

@media (max-width: 1180px) {
  :root { --header-h: 72px; }
  .nav-toggle { display: block; }
  .main-nav { position: fixed; inset: var(--header-h) 0 0 0; background: var(--ink); flex-direction: column; align-items: stretch; gap: 0; padding: 8px var(--gutter) 32px; overflow-y: auto; transform: translateX(100%); transition: transform .25s; }
  .main-nav.is-open { transform: none; }
  .main-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .main-nav__list > li { flex-wrap: wrap; border-bottom: 1px solid #2a2a2a; }
  .main-nav__list > li > a { flex: 1; padding: 14px 0; font-size: 17px; }
  .sub-toggle { width: 44px; height: 44px; }
  .has-sub.is-open > .sub-toggle { transform: rotate(270deg); }
  .sub { position: static; width: 100%; box-shadow: none; border: 0; padding: 0 0 8px 12px; display: none; opacity: 1; visibility: visible; transform: none; }
  .has-sub:hover > .sub, .has-sub:focus-within > .sub { display: none; }
  .has-sub.is-open > .sub { display: block; }
  .main-nav__aside { margin-top: 20px; justify-content: space-between; }
  .btn-contact { font-size: 17px; line-height: 44px; padding: 0 20px; }
  .nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  .nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  body.nav-open { overflow: hidden; }
}

/* ---------- page hero (inner pages: dark photo banner with text on the left) ---------- */
.page-hero { position: relative; color: #fff; background: var(--ink) center/cover no-repeat; min-height: clamp(360px, 40vw, 560px); display: flex; align-items: center; isolation: isolate; }
.page-hero::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(0,0,0,.85) 0%, rgba(0,0,0,.55) 45%, rgba(0,0,0,0) 75%); }
.page-hero__inner { padding-top: 48px; padding-bottom: 48px; }
.page-hero__eyebrow { font: 600 15px/1.4 var(--font-en); text-transform: uppercase; margin-bottom: 10px; }
.page-hero__title { font-family: var(--font-en); font-weight: 700; font-size: clamp(32px, 4.4vw, 60px); line-height: 1.05; text-transform: uppercase; max-width: 15em; }
.page-hero__title .accent { color: var(--red); }
.page-hero__text { max-width: 640px; margin-top: 18px; font-size: clamp(16px, 1.4vw, 19px); }
.breadcrumb { font: 400 14px/1.4 var(--font-en); color: #777; padding: 16px 0 0; }
.breadcrumb a { color: inherit; text-decoration: none; }
.breadcrumb a:hover { color: var(--red); }
.breadcrumb span[aria-current] { color: var(--red); }

/* ---------- CTA band (shared) ---------- */
.cta-band { position: relative; color: #fff; background: #200 url("../img/common/cta-bg.webp") 70% 35%/cover no-repeat; isolation: isolate; }
.cta-band::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(40,0,0,.55) 0%, rgba(40,0,0,.2) 55%, transparent 80%); }
.cta-band__inner { padding-top: 76px; padding-bottom: 76px; }
.cta-band__title { font-family: var(--font-en); font-weight: 700; font-size: clamp(28px, 3.2vw, 45px); line-height: 1.25; }
.cta-band__text { max-width: 710px; font-size: 17px; margin: 10px 0 18px; }
@media (max-width: 760px) { .cta-band::before { background: rgba(30,0,0,.6); } .cta-band { background-position: 85% 35%; } }

/* ---------- cards ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
@media (max-width: 960px) { .grid-3 { grid-template-columns: repeat(2, 1fr); gap: 24px; } }
@media (max-width: 600px) { .grid-3 { grid-template-columns: 1fr; } }

.news-card { display: flex; flex-direction: column; background: var(--ink); color: var(--bg); text-decoration: none; transition: transform .2s, box-shadow .2s; }
.news-card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(0,0,0,.25); }
.news-card__img { aspect-ratio: 16/9; width: 100%; object-fit: cover; }
.news-card__body { padding: 16px 22px 14px; flex: 1; display: flex; flex-direction: column; }
.news-card__title { font: 600 20px/1.25 var(--font-th); margin-top: 6px; flex: 1; }
.news-card__foot { background: #000; text-align: right; padding: 5px 12px; }

/* ---------- footer ---------- */
.site-footer { color: #fff; background: #12002a url("../img/common/footer-bg.webp") center top/cover no-repeat; }
.footer__inner { max-width: 1440px; margin: 0 auto; padding: 50px clamp(16px, 5vw, 74px) 30px; display: grid; grid-template-columns: minmax(300px, 420px) 1fr auto; gap: 32px 48px; align-items: start; }
.footer__brand img { width: min(400px, 100%); height: auto; margin-bottom: 4px; }
.footer__company { font: 600 20px/1.3 var(--font-en); margin: 0 0 6px 10px; }
.footer__addr { font: 400 15px/1.4 var(--font-th); margin: 0 0 18px 10px; }
.footer__contact { display: flex; align-items: center; gap: 12px; margin: 0 0 8px 10px; font: 400 15px/1.4 var(--font-en); }
.footer__contact img { width: 23px; height: 23px; flex: none; }
.footer__contact a { text-decoration: none; }
.footer__contact a:hover { text-decoration: underline; }
.footer__nav { display: grid; grid-template-columns: repeat(4, auto); gap: 24px 40px; justify-content: start; padding-top: 24px; }
.footer__nav div { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; }
.footer__nav a, .footer__nav span { font: 400 15px/1.4 var(--font-en); text-decoration: none; padding-left: 14px; }
.footer__nav a:hover { text-decoration: underline; }
.footer__nav .footer__head { font: 600 17px/1.4 var(--font-en); padding-left: 0; }
.footer__nav .footer__social { display: inline-flex; align-items: center; gap: 6px; padding-left: 0; }
.footer__social img { width: 18px; height: 18px; flex: none; object-fit: contain; }
.footer__nav .btn-contact--footer { padding: 0 8px; margin-top: 6px; }
.footer__qr { background: #fff; border-radius: 5px; padding: 4px; margin-top: 14px; }
.footer__qr img { width: 97px; border-radius: 5px; }
.footer__bottom { max-width: calc(1440px - 2 * 74px); margin: 0 auto; border-top: 1px solid rgba(255,255,255,.7); padding: 6px 0 20px; font: 500 12px/1.4 var(--font-en); color: var(--line); }
@media (max-width: 1100px) { .footer__inner { grid-template-columns: 1fr auto; } .footer__nav { grid-column: 1 / -1; grid-row: 2; } }
@media (max-width: 640px) {
  .footer__inner { grid-template-columns: 1fr; }
  .footer__nav { grid-template-columns: repeat(2, auto); grid-row: auto; }
  .footer__qr { justify-self: start; }
  .footer__bottom { margin: 0 16px; }
}

/* ---------- reveal on scroll ---------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }