/* Landing Engine — public page styles.
   All theme colors / fonts / radii come from config.theme, mapped to the
   CSS variables below by render.js (ARCHITECTURE.md section 5.1). */

:root {
  --color-primary: #E85D26;
  --color-accent: #F2A007;
  --color-bg: #FFF9F2;
  --color-surface: #FFFFFF;
  --color-text: #2B211B;
  --color-muted: #7A6A5F;
  --radius-card: 16px;
  --radius-btn: 12px;
  /* Darkened derivatives keep white button text at AA contrast even when
     a shop picks a mid-bright primary color. */
  --color-primary-strong: color-mix(in srgb, var(--color-primary) 76%, #000 24%);
  --color-primary-soft: color-mix(in srgb, var(--color-primary) 12%, var(--color-bg));
  --color-accent-soft: color-mix(in srgb, var(--color-accent) 18%, var(--color-bg));
  --color-line: color-mix(in srgb, var(--color-text) 14%, transparent);
  --shadow-card: 0 10px 30px color-mix(in srgb, var(--color-text) 10%, transparent);
  --max-width: 1180px;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
body.font-display-serif h1, body.font-display-serif h2, body.font-display-serif h3 {
  font-family: "Playfair Display", Georgia, serif;
}

img { max-width: 100%; display: block; }
a { color: var(--color-primary-strong); }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; border-radius: 4px; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 60;
  background: var(--color-text); color: var(--color-bg); padding: .6rem 1rem;
}
.skip-link:focus { left: .5rem; top: .5rem; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}
/* Shop-awning stripe: the one bold decorative gesture, taken from the
   striped canvas awnings of Vietnamese street food stalls. */
.site-header::before {
  content: ""; display: block; height: 6px;
  background: repeating-linear-gradient(-45deg,
    var(--color-primary) 0 26px, var(--color-surface) 26px 30px,
    var(--color-accent) 30px 56px, var(--color-surface) 56px 60px);
}
.header-inner {
  max-width: var(--max-width); margin: 0 auto; padding: .7rem 1.25rem;
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: .7rem; text-decoration: none; color: var(--color-text); margin-right: auto; }
.brand-logo img { width: 44px; height: 44px; object-fit: contain; border-radius: var(--radius-btn); }
.brand-name { display: block; font-weight: 800; font-size: 1.25rem; line-height: 1.15; letter-spacing: -.01em; }
.brand-tagline { display: block; font-size: .85rem; color: var(--color-muted); line-height: 1.3; }
.site-nav { display: flex; gap: .25rem; flex-wrap: wrap; }
.nav-link {
  color: var(--color-text); text-decoration: none; font-weight: 600; font-size: .95rem;
  padding: .45rem .8rem; border-radius: var(--radius-btn);
}
.nav-link:hover { background: var(--color-primary-soft); color: var(--color-primary-strong); }
.nav-toggle { display: none; background: none; border: 1px solid var(--color-line); border-radius: var(--radius-btn); padding: .5rem .6rem; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-text); margin: 4px 0; }

/* ---------- status / error ---------- */
.page-status { max-width: var(--max-width); margin: 0 auto; padding: 4rem 1.25rem; color: var(--color-muted); }
.page-error {
  max-width: 640px; margin: 3rem auto; padding: 1.5rem; text-align: center;
  background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius-card);
}
.page-error button {
  font: inherit; font-weight: 700; cursor: pointer; border: none;
  background: var(--color-primary-strong); color: #fff;
  padding: .7rem 1.6rem; border-radius: var(--radius-btn);
}

/* ---------- hero ---------- */
.hero { border-bottom: 1px solid var(--color-line); background:
  radial-gradient(560px 300px at 88% -60px, var(--color-accent-soft), transparent 70%),
  radial-gradient(700px 380px at -120px 110%, var(--color-primary-soft), transparent 70%);
}
.hero-inner {
  max-width: var(--max-width); margin: 0 auto; padding: 4.5rem 1.25rem 4rem;
  display: grid; grid-template-columns: 1fr; gap: 2.5rem; align-items: center;
}
.hero-inner.hero-has-image { grid-template-columns: 1.05fr .95fr; }
.hero-badge {
  display: inline-block; margin: 0 0 1.1rem; padding: .35rem .9rem;
  background: var(--color-surface); border: 1.5px dashed var(--color-primary);
  color: var(--color-primary-strong); font-weight: 700; font-size: .92rem;
  border-radius: 999px; transform: rotate(-1.2deg);
}
.hero-title { font-size: clamp(2.4rem, 5.6vw, 4.1rem); line-height: 1.06; letter-spacing: -.02em; margin: 0 0 1.1rem; font-weight: 800; }
.hero-subtitle { font-size: 1.15rem; color: var(--color-muted); margin: 0 0 1.8rem; max-width: 34em; }
.hero-actions { display: flex; gap: .8rem; flex-wrap: wrap; }
.hero-media img { border-radius: var(--radius-card); box-shadow: var(--shadow-card); aspect-ratio: 4/3; object-fit: cover; width: 100%; }

.btn {
  display: inline-block; font-weight: 700; text-decoration: none; text-align: center;
  padding: .85rem 1.7rem; border-radius: var(--radius-btn); border: 2px solid transparent;
  transition: transform .15s ease, background-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--color-primary-strong); color: #fff; }
.btn-primary:hover { background: color-mix(in srgb, var(--color-primary) 64%, #000 36%); }
.btn-secondary { background: transparent; color: var(--color-primary-strong); border-color: var(--color-primary); }
.btn-secondary:hover { background: var(--color-primary-soft); }

/* ---------- sections ---------- */
.section { padding: 4rem 0; }
.section:nth-of-type(even) { background: color-mix(in srgb, var(--color-surface) 55%, var(--color-bg)); }
.section-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem; }
.section-title { font-size: clamp(1.7rem, 3.4vw, 2.4rem); line-height: 1.15; letter-spacing: -.015em; margin: 0 0 .5rem; font-weight: 800; }
.section-subtitle { color: var(--color-muted); margin: 0 0 2rem; max-width: 42em; }
.section-title + .card-grid, .section-title + .gallery-grid, .section-title + .faq-list, .section-title + .contact-layout { margin-top: 1.6rem; }

.card-grid { display: grid; gap: 1.25rem; }
.products-grid, .features-grid, .testimonials-grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.pricing-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); align-items: stretch; }

/* products */
.product-card {
  background: var(--color-surface); border: 1px solid var(--color-line);
  border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card);
  display: flex; flex-direction: column;
}
.product-media { position: relative; }
.product-media img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.product-placeholder {
  aspect-ratio: 4/3; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--color-primary-soft), var(--color-accent-soft));
}
.placeholder-mark { font-size: 3.4rem; font-weight: 800; color: var(--color-primary); opacity: .55; }
.product-badge {
  position: absolute; top: .8rem; left: .8rem;
  background: var(--color-primary-strong); color: #fff; font-weight: 700; font-size: .82rem;
  padding: .25rem .7rem; border-radius: 999px; box-shadow: var(--shadow-card);
}
.product-body { padding: 1.1rem 1.2rem 1.25rem; display: flex; flex-direction: column; gap: .45rem; flex: 1; }
.product-name { margin: 0; font-size: 1.15rem; line-height: 1.3; }
.product-desc { margin: 0; color: var(--color-muted); font-size: .96rem; flex: 1; }
.product-price-row { margin: .4rem 0 0; display: flex; align-items: baseline; gap: .6rem; }
.product-price { font-size: 1.3rem; font-weight: 800; color: var(--color-primary-strong); }
.product-original { color: var(--color-muted); text-decoration: line-through; font-size: 1rem; }

/* features */
.feature-card {
  background: var(--color-surface); border: 1px solid var(--color-line);
  border-radius: var(--radius-card); padding: 1.5rem 1.3rem;
}
.feature-icon {
  display: inline-grid; place-items: center; width: 52px; height: 52px; font-size: 1.5rem;
  background: var(--color-accent-soft); border-radius: 50%; margin-bottom: .8rem;
}
.feature-title { margin: 0 0 .35rem; font-size: 1.08rem; }
.feature-desc { margin: 0; color: var(--color-muted); font-size: .96rem; }

/* about */
.about-layout { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.about-layout.about-has-image { grid-template-columns: 1.1fr .9fr; align-items: start; }
.about-body p { margin: 0 0 1rem; max-width: 38em; }
.about-media img { border-radius: var(--radius-card); box-shadow: var(--shadow-card); width: 100%; }
.about-stats { display: flex; gap: 1rem; flex-wrap: wrap; margin: 2.2rem 0 0; padding: 0; }
.stat {
  flex: 1 1 150px; background: var(--color-surface); border: 1px solid var(--color-line);
  border-top: 4px solid var(--color-accent); border-radius: var(--radius-card); padding: 1rem 1.2rem;
}
.stat-value { margin: 0; font-size: 1.9rem; font-weight: 800; line-height: 1.1; color: var(--color-primary-strong); }
.stat-label { margin: .2rem 0 0; color: var(--color-muted); font-size: .95rem; }

/* gallery */
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.25rem; }
.gallery-item { margin: 0; }
.gallery-item img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--radius-card); }
.gallery-caption { color: var(--color-muted); font-size: .92rem; margin-top: .5rem; }

/* testimonials */
.testimonial-card {
  margin: 0; background: var(--color-surface); border: 1px solid var(--color-line);
  border-radius: var(--radius-card); padding: 1.5rem 1.4rem; display: flex; flex-direction: column; gap: .8rem;
}
.testimonial-stars { margin: 0; color: var(--color-accent); font-size: 1.1rem; letter-spacing: .15em; }
.testimonial-quote { margin: 0; font-size: 1.02rem; flex: 1; }
.testimonial-person { display: flex; align-items: center; gap: .8rem; }
.testimonial-person img { width: 46px; height: 46px; border-radius: 50%; object-fit: cover; }
.avatar-initial {
  display: inline-grid; place-items: center; width: 46px; height: 46px; border-radius: 50%;
  background: var(--color-primary-soft); color: var(--color-primary-strong); font-weight: 800; font-size: 1.15rem;
}
.testimonial-who { display: flex; flex-direction: column; line-height: 1.3; }
.testimonial-name { font-weight: 700; }
.testimonial-role { color: var(--color-muted); font-size: .9rem; }

/* pricing */
.plan-card {
  position: relative; background: var(--color-surface); border: 1px solid var(--color-line);
  border-radius: var(--radius-card); padding: 1.8rem 1.5rem; display: flex; flex-direction: column; gap: .6rem;
}
.plan-highlighted { border: 2.5px solid var(--color-primary); box-shadow: var(--shadow-card); }
.plan-flag {
  position: absolute; top: -0.85rem; right: 1.2rem; margin: 0;
  background: var(--color-primary-strong); color: #fff; font-weight: 700; font-size: .85rem;
  padding: .2rem .8rem; border-radius: 999px;
}
.plan-name { margin: 0; font-size: 1.2rem; }
.plan-price-row { margin: 0; display: flex; align-items: baseline; gap: .35rem; flex-wrap: wrap; }
.plan-price { font-size: 2rem; font-weight: 800; color: var(--color-primary-strong); line-height: 1.1; }
.plan-period { color: var(--color-muted); }
.plan-desc { margin: 0; color: var(--color-muted); }
.plan-features { list-style: none; margin: .4rem 0 1rem; padding: 0; display: grid; gap: .45rem; flex: 1; }
.plan-features li { display: flex; gap: .55rem; align-items: baseline; }
.plan-check { color: var(--color-primary-strong); font-weight: 800; }
.plan-cta { margin-top: auto; }

/* faq */
.faq-list { display: grid; gap: .8rem; max-width: 820px; }
.faq-item { background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius-card); padding: 0 1.3rem; }
.faq-question { cursor: pointer; font-weight: 700; padding: 1.05rem 0; list-style-position: outside; }
.faq-answer { margin: 0; padding: 0 0 1.1rem; color: var(--color-muted); }

/* contact */
.contact-layout { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.contact-layout:has(.contact-map) { grid-template-columns: 1fr 1fr; align-items: start; }
.contact-row { margin: 0 0 1rem; display: grid; gap: .1rem; }
.contact-label { font-weight: 700; font-size: .92rem; color: var(--color-muted); }
.contact-value { font-size: 1.08rem; }
.contact-actions { display: flex; gap: .8rem; flex-wrap: wrap; margin-top: 1.4rem; }
.contact-map { width: 100%; min-height: 320px; border: 1px solid var(--color-line); border-radius: var(--radius-card); }

/* ---------- footer ---------- */
.site-footer { background: var(--color-text); color: var(--color-bg); margin-top: 0; }
.footer-inner {
  max-width: var(--max-width); margin: 0 auto; padding: 3rem 1.25rem 2rem;
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem;
}
.footer-brand { font-size: 1.3rem; font-weight: 800; margin: 0 0 .5rem; }
.footer-text { margin: 0; opacity: .85; max-width: 32em; }
.footer-heading { font-weight: 700; margin: 0 0 .7rem; }
.footer-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .45rem; }
.footer-list a { color: var(--color-bg); opacity: .85; text-decoration: none; }
.footer-list a:hover { opacity: 1; text-decoration: underline; }
.footer-bottom { border-top: 1px solid color-mix(in srgb, var(--color-bg) 22%, transparent); }
.footer-bottom p { max-width: var(--max-width); margin: 0 auto; padding: 1.1rem 1.25rem; font-size: .92rem; opacity: .8; }

/* ---------- floating Zalo ---------- */
.floating-zalo {
  position: fixed; right: 1.1rem; bottom: 1.1rem; z-index: 50;
  background: #0068FF; color: #fff; font-weight: 700; text-decoration: none;
  padding: .8rem 1.3rem; border-radius: 999px; box-shadow: 0 12px 28px rgba(0, 0, 0, .28);
}
.floating-zalo:hover { background: #0053cc; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero-inner.hero-has-image, .about-layout.about-has-image, .contact-layout:has(.contact-map) { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding: 2.8rem 0; }
  .hero-inner { padding: 3rem 1.1rem 2.8rem; }
  .header-inner { padding: .6rem 1rem; }
  .nav-toggle { display: block; margin-left: auto; }
  .brand { margin-right: 0; }
  .site-nav { display: none; width: 100%; flex-direction: column; gap: .1rem; padding-top: .5rem; }
  .site-nav.open { display: flex; }
  .nav-link { padding: .6rem .8rem; }
  .footer-inner { grid-template-columns: 1fr; padding: 2.4rem 1.1rem 1.6rem; }
  .hero-actions .btn { flex: 1 1 auto; }
  .floating-zalo { right: .9rem; bottom: .9rem; }
}