@font-face { font-family: "Inter"; font-weight: 400; font-display: swap; src: url("../fonts/inter-regular.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 600; font-display: swap; src: url("../fonts/inter-semibold.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 700; font-display: swap; src: url("../fonts/inter-bold.woff2") format("woff2"); }

:root {
  --crimson: #8e1b1b; --crimson-2: #6f1414; --gold: #b08a3e; --cream: #f7f3ee;
  --ink: #1f2328; --text: #3b424b; --muted: #6b7380; --rule: #e3ded6; --bg: #ffffff; --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --crimson: #e0675a; --crimson-2: #c9544a; --gold: #d2b06a; --cream: #1d1a17;
    --ink: #f2efe9; --text: #d6d1c9; --muted: #a39d93; --rule: #3a352f; --bg: #141210; --card: #1b1916;
  }
}
:root[data-theme="dark"] {
  --crimson: #e0675a; --crimson-2: #c9544a; --gold: #d2b06a; --cream: #1d1a17;
  --ink: #f2efe9; --text: #d6d1c9; --muted: #a39d93; --rule: #3a352f; --bg: #141210; --card: #1b1916;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 16px/1.6 "Inter", system-ui, -apple-system, "Segoe UI", sans-serif; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--crimson); }
h1, h2, h3 { color: var(--ink); line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 700; letter-spacing: -.02em; }
h2 { font-size: clamp(1.45rem, 3vw, 2rem); font-weight: 700; letter-spacing: -.01em; }
h3 { font-size: 1.05rem; font-weight: 600; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.skip { position: absolute; left: -999px; top: 0; background: var(--crimson); color: #fff; padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* bilingual switching */
html[data-lang="en"] [lang="vi"]:not(html) { display: none !important; }
html[data-lang="vi"] [lang="en"]:not(html):not(button) { display: none !important; }

.top { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--rule); }
.top-in { display: flex; align-items: center; justify-content: space-between; min-height: 60px; gap: 12px; }
.brand { font-weight: 700; font-size: 1.25rem; color: var(--ink); text-decoration: none; display: flex; align-items: baseline; gap: 8px; }
.brand span { font-weight: 400; font-size: .8rem; color: var(--muted); }
.lang { display: flex; border: 1px solid var(--rule); border-radius: 999px; overflow: hidden; }
.lang button { font: inherit; font-size: .85rem; padding: 6px 12px; border: 0; background: transparent; color: var(--text); cursor: pointer; min-height: 36px; }
.lang button[aria-pressed="true"] { background: var(--crimson); color: #fff; }
.lang button:focus-visible, .btn:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

.hero { position: relative; min-height: min(78vh, 640px); display: flex; align-items: flex-end; color: #fff; overflow: hidden; }
.hero-img { position: absolute; inset: 0; background: #3a1410 url("../img/gac-farm.jpg") center/cover no-repeat; }
.hero-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,8,6,.15) 0%, rgba(20,8,6,.55) 55%, rgba(20,8,6,.85) 100%); }
.hero-in { position: relative; padding-top: 96px; padding-bottom: 56px; }
.hero h1 { color: #fff; max-width: 16ch; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; font-weight: 600; color: #f1d9a4; margin: 0 0 12px; }
.lead { font-size: 1.12rem; max-width: 62ch; color: #f4ece4; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.btn { display: inline-block; background: var(--crimson); color: #fff; text-decoration: none; font-weight: 600; padding: 12px 20px; border-radius: 6px; }
.hero .btn { background: #b3261e; }
.btn.ghost { background: transparent; border: 1px solid rgba(255,255,255,.7); color: #fff; }

.band { background: var(--crimson-2); color: #fbeee9; }
.cols3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; padding-top: 22px; padding-bottom: 22px; }
.cols3 b { display: block; font-size: 1.5rem; color: #fff; }
.cols3 span { font-size: .92rem; }

section, section.wrap { padding-top: 64px; padding-bottom: 64px; }
section.band, section.hero { padding: 0; }
.tint { background: var(--cream); }
.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; }
.split.rev { grid-template-columns: .9fr 1.1fr; }
.ph img { border-radius: 10px; width: 100%; aspect-ratio: 4/3; object-fit: cover; background: var(--cream); }
figure { margin: 0; }
.sub { color: var(--muted); max-width: 70ch; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 20px; }
.cards.c2 { grid-template-columns: repeat(2, 1fr); }
.cards article { background: var(--card); border: 1px solid var(--rule); border-top: 3px solid var(--crimson); border-radius: 8px; padding: 18px; }
.cards ul { margin: 0; padding-left: 18px; }
.cards li { margin-bottom: 6px; }
.steps { list-style: none; padding: 0; margin: 20px 0 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.steps li { background: var(--card); border: 1px solid var(--rule); border-radius: 8px; padding: 14px; font-size: .95rem; }
.steps b { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--crimson); color: #fff; font-size: .85rem; margin-bottom: 8px; }
.steps li > span { display: block; }
.contact a { font-weight: 600; }
.foot { border-top: 1px solid var(--rule); padding: 24px 0 36px; font-size: .9rem; }
.foot p { margin: 4px 0; }

@media (max-width: 860px) {
  .split, .split.rev { grid-template-columns: 1fr; gap: 24px; }
  .split.rev figure { order: 2; }
  .cards, .cards.c2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .cols3 { grid-template-columns: 1fr; gap: 12px; }
  section, section.wrap { padding-top: 44px; padding-bottom: 44px; }
}
@media (max-width: 420px) { .steps { grid-template-columns: 1fr; } .brand span { display: none; } }