/* VietCraft – trang bán hàng. Màu thương hiệu: đỏ son + vàng sao; nền sáng, chữ đậm dễ đọc. */
:root {
  --red: #C8102E; --red-d: #A50E22; --red-l: #FDECEE;
  --gold: #FFCD00; --gold-d: #E0AE00;
  --blue: #1366C2;
  --ink: #141A23; --ink-2: #3A4454; --muted: #667085; --line: #E6E8EC;
  --bg: #FFFFFF; --bg-2: #F6F7F9; --card: #FFFFFF;
  --radius: 14px; --shadow: 0 10px 30px rgba(20, 26, 35, .08);
  --font: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 16px/1.65 var(--font); color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; }
a { color: var(--red); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(30px, 4.4vw, 50px); font-weight: 800; }
h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; }
h3 { font-size: 19px; font-weight: 700; }
p { margin: 0 0 1em; }
.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 820px; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 10px; top: 10px; background: #fff; padding: 8px; z-index: 100; }

/* Nút */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 11px 20px; border-radius: 10px;
  font: 600 15px/1.2 var(--font); border: 2px solid transparent; cursor: pointer; text-decoration: none !important; transition: .15s; white-space: nowrap; }
.btn svg { width: 18px; height: 18px; }
.btn-sm { padding: 8px 14px; font-size: 14px; }
.btn-lg { padding: 14px 24px; font-size: 16px; }
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 6px 16px rgba(200, 16, 46, .25); }
.btn-primary:hover { background: var(--red-d); }
.btn-outline { border-color: var(--red); color: var(--red); background: #fff; }
.btn-outline:hover { background: var(--red-l); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink-2); }
.btn-gold { background: var(--gold); color: var(--ink); }
.btn-gold:hover { background: var(--gold-d); }
.btn-ghost-light { color: #fff; border-color: rgba(255,255,255,.5); }
.btn-ghost-light:hover { background: rgba(255,255,255,.1); }
.btn-disabled { background: var(--bg-2); color: var(--muted); border-color: var(--line); cursor: default; }

/* Thanh trên */
.topbar { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.topbar-in { display: flex; align-items: center; gap: 20px; height: 70px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none !important; }
.brand b { display: block; font-size: 20px; font-weight: 800; letter-spacing: -.02em; }
.brand small { display: block; font-size: 11px; color: var(--muted); line-height: 1.2; }
.brand .mark { flex: none; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a:not(.btn) { color: var(--ink-2); padding: 8px 12px; border-radius: 8px; font-weight: 500; font-size: 15px; }
.nav a:not(.btn):hover { background: var(--bg-2); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--red); font-weight: 600; }
.nav .btn { margin-left: 8px; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 0; width: 44px; height: 44px; cursor: pointer; padding: 10px; }
.nav-toggle span { display: block; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; }

/* Hero */
.hero { background: radial-gradient(1200px 500px at 85% -10%, rgba(255,205,0,.18), transparent 60%),
  radial-gradient(900px 500px at -10% 0%, rgba(200,16,46,.10), transparent 60%), var(--bg); padding: 64px 0 56px; }
.hero-in { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; background: var(--red-l); color: var(--red); font-weight: 600; font-size: 14px; padding: 6px 12px; border-radius: 99px; margin-bottom: 18px; }
.eyebrow svg { width: 16px; height: 16px; }
.lead { font-size: 18.5px; color: var(--ink-2); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 20px; }
.hero-points { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px 22px; color: var(--ink-2); font-size: 15px; }
.hero-points li { display: flex; align-items: center; gap: 6px; }
.hero-points svg, .ticks svg { width: 18px; height: 18px; color: #16A34A; flex: none; margin-top: 3px; }
.hero-art .illus, .hero-art .shot { width: 100%; height: auto; filter: drop-shadow(0 30px 50px rgba(20,26,35,.18)); border-radius: 14px; }
.hero-product { background: radial-gradient(900px 500px at 90% -10%, color-mix(in srgb, var(--c) 14%, transparent), transparent 60%), var(--bg); }
.pc-head { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.pc-head h1, .pc-head h2, .pc-head h3 { margin: 0; }
.pc-head p { margin: 2px 0 0; color: var(--muted); }

/* Khối nội dung */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-2); }
.section-head { max-width: 720px; margin-bottom: 34px; }
.section-head p { color: var(--muted); font-size: 17px; }
.page-head { padding: 56px 0 8px; background: linear-gradient(180deg, var(--bg-2), var(--bg)); }

.products { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.product-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow);
  border-top: 5px solid var(--c); display: flex; flex-direction: column; }
.product-card .pc-cta { margin-top: auto; display: flex; gap: 10px; flex-wrap: wrap; padding-top: 10px; }
.ticks { list-style: none; padding: 0; margin: 0 0 18px; }
.ticks li { display: flex; gap: 10px; padding: 5px 0; color: var(--ink-2); }

.why { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 22px; }
.why > div { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.why svg { width: 34px; height: 34px; color: var(--red); margin-bottom: 10px; }
.why p { color: var(--muted); margin: 0; }

.steps { list-style: none; counter-reset: s; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.steps li { counter-increment: s; position: relative; padding: 24px 24px 24px 76px; border: 1px solid var(--line); border-radius: var(--radius); }
.steps li::before { content: counter(s); position: absolute; left: 22px; top: 22px; width: 38px; height: 38px; border-radius: 50%;
  background: var(--gold); color: var(--ink); font-weight: 800; display: grid; place-items: center; }
.steps b { display: block; font-size: 17px; }
.steps span { color: var(--muted); font-size: 15px; }

.cta-band { background: linear-gradient(120deg, var(--red-d), var(--red)); color: #fff; padding: 52px 0; }
.cta-in { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-in h2 { margin: 0 0 6px; } .cta-in p { margin: 0; opacity: .9; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.feature { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.feature svg { width: 26px; height: 26px; color: var(--red); background: var(--red-l); border-radius: 8px; padding: 4px; margin-bottom: 8px; }
.feature p { color: var(--muted); margin: 0; }

.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; align-items: stretch; }
.plan { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; }
.plan .btn { margin-top: auto; }
.plan-hl { border: 2px solid var(--red); box-shadow: var(--shadow); }
.plan .tag { position: absolute; top: -12px; left: 24px; background: var(--gold); color: var(--ink); font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 99px; }
.price { margin: 6px 0 16px; } .price b { font-size: 30px; font-weight: 800; } .price span { color: var(--muted); margin-left: 6px; }
.notes { background: var(--bg-2); border-radius: var(--radius); padding: 20px; color: var(--ink-2); }

.faq { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; position: relative; padding-right: 30px; }
.faq summary::after { content: '+'; position: absolute; right: 4px; top: -2px; font-size: 24px; color: var(--red); }
.faq[open] summary::after { content: '–'; }
.faq p { margin: 10px 0 0; color: var(--ink-2); }

.downloads { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 24px; }
.dl-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; border-top: 5px solid var(--c); box-shadow: var(--shadow); scroll-margin-top: 90px; }
.dl-buttons { display: flex; gap: 12px; flex-wrap: wrap; margin: 14px 0; }
.howto li { margin-bottom: 8px; }

.contact-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 28px; align-items: start; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.card-soft { background: var(--bg-2); box-shadow: none; margin-top: 18px; }
.contact-side .big { font-size: 24px; font-weight: 800; display: flex; align-items: center; gap: 10px; }
.contact-side .big svg { width: 26px; height: 26px; color: var(--red); }
.ci { display: flex; align-items: flex-start; gap: 10px; margin: 0 0 8px; }
.ci svg { width: 20px; height: 20px; flex: none; color: var(--red); margin-top: 3px; }
.form label { display: block; font-weight: 600; font-size: 14px; color: var(--ink-2); margin-bottom: 14px; }
.form input:not([type=checkbox]), .form select, .form textarea { display: block; width: 100%; margin-top: 6px; padding: 11px 13px; border: 1.5px solid var(--line);
  border-radius: 10px; font: 15px var(--font); color: var(--ink); background: #fff; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--red); box-shadow: 0 0 0 3px var(--red-l); }
.form .check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.form .check input { margin-top: 5px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.hp { position: absolute !important; left: -9999px !important; }
.form-msg { margin: 12px 0 0; font-weight: 600; }
.form-msg.ok { color: #15803D; } .form-msg.err { color: var(--red); }
.prose h2 { font-size: 22px; margin-top: 1.6em; } .prose li { margin-bottom: 6px; }

/* Chân trang */
.footer { background: #0F141B; color: #C9D1DC; padding: 56px 0 0; margin-top: 0; }
.footer a { color: #E7ECF2; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 32px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-grid > div > a:not(.brand) { display: block; padding: 3px 0; font-size: 15px; }
.footer .muted { color: #8F9AA8; font-size: 14px; margin-top: 14px; }
.brand-light b { color: #fff; } .brand-light small { color: #8F9AA8; }
.footer .ci svg { color: var(--gold); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; border-top: 1px solid #222B36; margin-top: 40px; padding: 18px 20px; font-size: 14px; color: #8F9AA8; }

/* Chat */
.vc-chat-btn { position: fixed; right: 20px; bottom: 20px; z-index: 80; width: 60px; height: 60px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--red); color: #fff; box-shadow: 0 12px 30px rgba(200,16,46,.4); display: grid; place-items: center; }
.vc-chat-btn svg { width: 28px; height: 28px; }
.vc-chat-btn .dot { position: absolute; top: 4px; right: 4px; width: 14px; height: 14px; border-radius: 50%; background: var(--gold); border: 2px solid #fff; display: none; }
.vc-chat-btn.has-new .dot { display: block; }
.vc-chat { position: fixed; right: 20px; bottom: 92px; z-index: 81; width: 370px; max-width: calc(100vw - 24px); height: 540px; max-height: calc(100vh - 120px);
  background: #fff; border-radius: 18px; box-shadow: 0 24px 60px rgba(20,26,35,.28); display: none; flex-direction: column; overflow: hidden; }
.vc-chat.open { display: flex; }
.vc-chat header { background: linear-gradient(120deg, var(--red-d), var(--red)); color: #fff; padding: 16px 18px; display: flex; align-items: center; gap: 12px; }
.vc-chat header b { display: block; } .vc-chat header small { opacity: .9; }
.vc-chat header .x { margin-left: auto; background: none; border: 0; color: #fff; font-size: 26px; cursor: pointer; line-height: 1; }
.vc-status { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: #9CA3AF; margin-right: 6px; }
.vc-status.on { background: #4ADE80; }
.vc-body { flex: 1; overflow: auto; padding: 16px; background: var(--bg-2); }
.vc-msg { max-width: 82%; margin: 0 0 10px; padding: 9px 13px; border-radius: 14px; font-size: 14.5px; line-height: 1.5; white-space: pre-wrap; word-wrap: break-word; }
.vc-msg.visitor { margin-left: auto; background: var(--red); color: #fff; border-bottom-right-radius: 4px; }
.vc-msg.agent { background: #fff; border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.vc-msg.system { margin: 8px auto; background: none; color: var(--muted); font-size: 13px; text-align: center; }
.vc-msg .who { display: block; font-size: 12px; font-weight: 600; color: var(--red); margin-bottom: 2px; }
.vc-form { padding: 16px; display: grid; gap: 10px; }
.vc-form input, .vc-form textarea, .vc-compose textarea { width: 100%; padding: 10px 12px; border: 1.5px solid var(--line); border-radius: 10px; font: 14.5px var(--font); }
.vc-compose { display: flex; gap: 8px; padding: 10px; border-top: 1px solid var(--line); }
.vc-compose textarea { resize: none; height: 44px; }
.vc-compose button { background: var(--red); color: #fff; border: 0; border-radius: 10px; padding: 0 16px; font-weight: 600; cursor: pointer; }
.vc-note { font-size: 12.5px; color: var(--muted); }
.vc-err { color: var(--red); font-size: 13px; min-height: 1em; }

@media (max-width: 960px) {
  .hero-in, .contact-grid { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 560px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 70px; background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; padding: 10px 16px 16px; box-shadow: var(--shadow); }
  .nav.open { display: flex; }
  .nav .btn { margin: 8px 0 0; }
}
@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  .section { padding: 52px 0; }
  .grid2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .brand small { display: none; }
  .products, .downloads, .plans { grid-template-columns: 1fr; }
  .vc-chat { right: 12px; bottom: 84px; }
}