/* ==========================================================================
   05-chrome.css
   Page chrome: footer, floating messenger dock, 404, scroll reveal, global breakpoints.
   Load order: 5 of 7 - see README.md ("Stylesheet layer order").
   ========================================================================== */

/* --------------------------------------------------------------------------
   20. Footer
   -------------------------------------------------------------------------- */
.site-footer { background: var(--plum-900); color: rgba(255,255,255,.7); font-size: .9rem; }
.footer-grid {
  display: grid; gap: clamp(2rem, 4vw, 3rem);
  padding-block: clamp(3rem, 6vw, 4.5rem);
}
.footer-brand { max-width: 34rem; }
.brand-footer { color: #fff; margin-bottom: 1.15rem; }
.brand-footer:hover { color: #fff; }
.brand-footer .brand-mark { color: var(--sun-500); }
.brand-footer .brand-tag { color: var(--plum-300); }
.footer-about { color: rgba(255,255,255,.62); font-size: .88rem; margin-bottom: 1.25rem; }
.footer-chips { display: flex; flex-wrap: wrap; gap: .5rem; }
.footer-chips .chip { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.16); color: #fff; }

.footer-title {
  font-size: .74rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: var(--sun-400); margin-bottom: 1.1rem;
}
.footer-list { display: grid; gap: .6rem; }
.footer-list a { color: rgba(255,255,255,.68); font-size: .88rem; }
.footer-list a:hover { color: var(--sun-300); }

.footer-contact { display: grid; gap: .85rem; margin-bottom: 1.5rem; }
.footer-contact li { display: flex; gap: .65rem; align-items: flex-start; font-size: .87rem; }
.footer-contact .icon { color: var(--sun-500); margin-top: .28em; flex: none; }
.footer-contact a { color: rgba(255,255,255,.8); }
.footer-contact a:hover { color: var(--sun-300); }

.footer-langs { display: flex; flex-wrap: wrap; gap: .4rem; }
.footer-langs a {
  padding: .35rem .75rem;
  background: rgba(255,255,255,.07);
  font-size: .78rem; color: rgba(255,255,255,.7);
}
.footer-langs a:hover { background: rgba(255,255,255,.14); color: #fff; }
.footer-langs a.is-active { background: var(--sun-500); color: var(--plum-900); font-weight: 600; }

.footer-base {
  display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; justify-content: space-between;
  padding-block: 1.5rem;
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: .78rem; color: rgba(255,255,255,.45);
}
.footer-base p { margin: 0; }

/* --------------------------------------------------------------------------
   21. Floating dock
   -------------------------------------------------------------------------- */
.dock {
  position: fixed; z-index: 90;
  inset-inline-end: clamp(.75rem, 2vw, 1.5rem);
  bottom: clamp(.75rem, 2vw, 1.5rem);
  display: flex; flex-direction: column; gap: .55rem;
}
.dock-btn {
  display: inline-flex; align-items: center; gap: 0;
  width: 50px; height: 50px; padding: 0; color: #fff;
  box-shadow: 0 10px 26px -10px rgba(36, 21, 57,.6);
  overflow: hidden; white-space: nowrap;
  transition: width .32s var(--ease), gap .32s var(--ease), padding .32s var(--ease), transform .25s var(--ease);
}
.dock-btn svg, .dock-btn .icon { width: 24px; height: 24px; margin-inline: 13px; flex: none; }
/* Base wordmark. Moved here when 06-contact.css was deleted along with the
   contact components it styled; the dock rule below only extends it. */
.zalo-wordmark { font-weight: 800; font-size: .82rem; letter-spacing: -.02em; color: #fff; }
.dock-btn .zalo-wordmark { width: 50px; text-align: center; flex: none; font-size: .84rem; }
.dock-label { font-size: .85rem; font-weight: 600; opacity: 0; transition: opacity .2s var(--ease); }
.dock-btn:hover { width: auto; padding-inline-end: 1.2rem; color: #fff; transform: translateX(-2px); }
.dock-btn:hover .dock-label { opacity: 1; }

.dock-telegram { background: var(--telegram); }
.dock-zalo     { background: var(--zalo); }
.dock-phone    { background: var(--plum-700); }

/* Keep the dock clear of the footer's tail on small screens. */
@media (max-width: 640px) {
  /* A horizontal row of four 50px buttons covers too much of a product card on a
     phone; 42px keeps the tap targets usable while giving the content room. */
  .dock { flex-direction: row; gap: .4rem; inset-inline: auto clamp(.6rem, 2vw, 1.5rem); }
  .dock-btn { width: 42px; height: 42px; }
  .dock-btn svg, .dock-btn .icon { width: 20px; height: 20px; margin-inline: 11px; }
  .dock-btn .zalo-wordmark { width: 42px; font-size: .74rem; }
  .dock-btn:hover { width: 42px; padding-inline-end: 0; }
  .dock-label { display: none; }
  .site-footer { padding-bottom: 4rem; }
}

/* --------------------------------------------------------------------------
   22. 404
   -------------------------------------------------------------------------- */
.error-inner { max-width: 46rem; margin-inline: auto; text-align: center; padding-block: clamp(2rem, 6vw, 5rem); }
.error-inner .eyebrow { justify-content: center; font-size: 3rem; letter-spacing: -.03em; color: var(--slate-300); }
.error-inner .eyebrow::before { display: none; }
.error-actions { display: flex; flex-wrap: wrap; gap: .7rem; justify-content: center; margin-top: 2rem; }

/* --------------------------------------------------------------------------
   23. Scroll reveal
   -------------------------------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* --------------------------------------------------------------------------
   24. Breakpoints
   -------------------------------------------------------------------------- */
@media (min-width: 600px) {
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
  .qr-card { width: 210px; }
}

@media (min-width: 860px) {
  .split { grid-template-columns: 1fr 1fr; }
  .contact-layout { grid-template-columns: 1fr 1fr; }
  .cta-inner { grid-template-columns: 1.4fr auto; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1.2fr; }
}

@media (min-width: 1000px) {
  .nav-desktop { display: flex; }
  .nav-toggle { display: none; }
  .nav-mobile { display: none !important; }
  .header-cta { display: inline-flex; }
}