/* ============================================================================
 * components.css — Navbar, footer, buttons, cards, forms, motion, media
 * ==========================================================================*/

/* ---------- Buttons ------------------------------------------------------- */
.btn {
  --btn-fg: var(--ink);
  --btn-bg: var(--gold);
  display: inline-flex; align-items: center; gap: .6rem;
  padding: .92em 1.6em;
  font-family: var(--font-body);
  font-weight: 600; font-size: .96rem; letter-spacing: .01em;
  color: var(--btn-fg); background: var(--btn-bg);
  border-radius: 999px;
  border: 1px solid transparent;
  position: relative; overflow: hidden;
  transition: transform .4s var(--ease), background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
  will-change: transform;
}
.btn .btn-ico { width: 1.05em; height: 1.05em; transition: transform .4s var(--ease); }
.btn:hover { transform: translateY(-2px); }
.btn:hover .btn-ico { transform: translateX(3px); }
/* subtle shine */
.btn::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,.35) 50%, transparent 70%);
  transform: translateX(-120%); transition: transform .7s var(--ease);
}
.btn:hover::after { transform: translateX(120%); }

.btn-ghost {
  --btn-bg: transparent; --btn-fg: var(--fg);
  border-color: var(--border);
}
.surface-light .btn-ghost { --btn-fg: var(--ink); border-color: var(--line-dark); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }
.surface-light .btn-ghost:hover { color: #9a7f45; }

.btn-dark { --btn-bg: var(--ink); --btn-fg: var(--warm-white); }

/* Text link w/ animated underline */
.link-u {
  display: inline-flex; align-items: center; gap: .45rem;
  font-weight: 600; color: var(--fg);
  position: relative; padding-bottom: 2px;
}
.link-u::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 100%;
  background: currentColor; transform: scaleX(0); transform-origin: left;
  transition: transform .45s var(--ease);
}
.link-u:hover { color: var(--gold); }
.link-u:hover::after { transform: scaleX(1); }
.link-u .btn-ico { width: 1em; height: 1em; transition: transform .4s var(--ease); }
.link-u:hover .btn-ico { transform: translateX(4px); }

/* ---------- Navbar -------------------------------------------------------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(11,13,15,.72);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom-color: var(--line);
}
.nav.scrolled.on-light {
  background: rgba(245,242,235,.78);
  border-bottom-color: var(--line-dark);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem; height: 74px;
}
.nav.on-light { color: var(--ink); }
.nav.on-dark { color: var(--warm-white); }

.brand { display: inline-flex; align-items: center; gap: .7rem; font-weight: 700; letter-spacing: .02em; }
.brand__mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  border: 1px solid currentColor; border-radius: 8px;
  font-family: var(--font-display); font-weight: 800; font-size: .95rem; letter-spacing: .04em;
  color: var(--gold); border-color: color-mix(in srgb, var(--gold) 55%, transparent);
}
.brand__name { font-family: var(--font-display); font-size: 1.05rem; }
.brand__name small { display:block; font-family: var(--font-body); font-weight:400; font-size:.62rem; letter-spacing:.22em; text-transform:uppercase; opacity:.6; }

.nav__menu { display: flex; align-items: center; gap: .3rem; }
.nav__item { position: relative; }
.nav__link {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .6rem .9rem; font-size: .93rem; font-weight: 500;
  border-radius: 999px; transition: color .25s var(--ease), background .25s var(--ease);
  opacity: .92;
}
.nav__link:hover, .nav__item[aria-current="true"] > .nav__link { color: var(--gold); opacity: 1; }
.nav__link .chev { width: .7em; height: .7em; transition: transform .3s var(--ease); opacity: .7; }
.nav__item:hover .chev { transform: rotate(180deg); }

.nav__dropdown {
  position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(8px);
  min-width: 260px; padding: .6rem;
  background: var(--charcoal); border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transition: opacity .3s var(--ease), transform .3s var(--ease);
}
.nav__item:hover .nav__dropdown, .nav__item:focus-within .nav__dropdown {
  opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}
.nav__dropdown a {
  display: block; padding: .7rem .85rem; border-radius: var(--radius);
  font-size: .92rem; color: var(--warm-white); transition: background .2s, color .2s;
}
.nav__dropdown a:hover { background: var(--gold-soft); color: var(--gold); }

.nav__cta { display: inline-flex; align-items: center; gap: 1rem; }
.nav__burger { display: none; width: 44px; height: 44px; align-items: center; justify-content: center; }
.nav__burger span { position: relative; width: 22px; height: 1.5px; background: currentColor; transition: .3s var(--ease); }
.nav__burger span::before, .nav__burger span::after { content:""; position:absolute; left:0; width:22px; height:1.5px; background: currentColor; transition:.3s var(--ease); }
.nav__burger span::before { top:-7px; } .nav__burger span::after { top:7px; }
body.menu-open .nav__burger span { background: transparent; }
body.menu-open .nav__burger span::before { top:0; transform: rotate(45deg); }
body.menu-open .nav__burger span::after { top:0; transform: rotate(-45deg); }

/* Mobile fullscreen menu */
.mobile-menu {
  position: fixed; inset: 0; z-index: 90;
  background: var(--ink); color: var(--warm-white);
  padding: 96px var(--gutter) 2rem;
  display: flex; flex-direction: column;
  transform: translateY(-100%); transition: transform .5s var(--ease);
  overflow-y: auto;
}
body.menu-open .mobile-menu { transform: translateY(0); }
.mobile-menu a { font-family: var(--font-display); font-size: clamp(1.5rem, 1.1rem + 2vw, 2.1rem); padding: .55rem 0; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items:center; }
.mobile-menu a:hover { color: var(--gold); }
.mobile-menu .mm-group-label { font-family: var(--font-body); font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--gold); margin-top: 1.6rem; margin-bottom: .3rem; }
.mobile-menu .mm-foot { margin-top: auto; padding-top: 2rem; display:flex; flex-direction:column; gap:1rem; }

@media (max-width: 1040px) {
  .nav__menu, .nav__cta .btn { display: none; }
  .nav__burger { display: inline-flex; }
}

/* ---------- Footer -------------------------------------------------------- */
.footer { background: var(--ink); color: var(--warm-white); padding-top: clamp(4rem,3rem+4vw,6.5rem); border-top:1px solid var(--line); }
.footer__top { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.4fr; gap: var(--gutter); padding-bottom: 3.5rem; }
@media (max-width: 900px) { .footer__top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer__top { grid-template-columns: 1fr; } }
.footer h5 { font-family: var(--font-body); font-size: .74rem; letter-spacing: .2em; text-transform: uppercase; color: var(--gold); margin-bottom: 1.2rem; }
.footer__col a { display: block; padding: .32rem 0; color: var(--muted-2); font-size: .95rem; transition: color .2s; }
.footer__col a:hover { color: var(--gold); }
.footer__brand .footer-quote { font-family: var(--font-display); font-style: italic; font-size: 1.15rem; line-height: 1.5; color: var(--warm-white); margin-top: 1rem; max-width: 30ch; }
.footer__bottom { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding: 1.6rem 0; border-top: 1px solid var(--line); font-size: .85rem; color: var(--muted); }
.social-row { display: flex; gap: .6rem; }
.social-row a { width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--muted-2); transition: .25s var(--ease); }
.social-row a:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-2px); }

/* ---------- Cards --------------------------------------------------------- */
.card {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; position: relative;
  transition: transform .5s var(--ease), border-color .5s var(--ease), box-shadow .5s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--gold) 45%, transparent); box-shadow: var(--shadow); }
.card__media { position: relative; aspect-ratio: 4/5; overflow: hidden; background: var(--charcoal-2); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.card:hover .card__media img { transform: scale(1.05); }
.card__body { padding: clamp(1.3rem, 1rem + 1vw, 1.9rem); }
.card__kicker { font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--gold); margin-bottom: .7rem; }
.card__title { font-size: var(--fs-h4); margin-bottom: .6rem; }
.card__meta { display:flex; gap: 1rem; font-size: .82rem; color: var(--fg-dim); margin-top: 1rem; }

/* Ecosystem premium card (large) */
.eco-card { display: flex; flex-direction: column; min-height: 440px; }
.eco-card .card__media { aspect-ratio: 4/5; flex: none; }
.eco-card .card__media::after {
  content:""; position:absolute; inset:0;
  background: linear-gradient(180deg, transparent 35%, rgba(11,13,15,.85) 100%);
}
.eco-card .eco-num { position:absolute; top:1.1rem; left:1.3rem; z-index:2; font-family:var(--font-display); font-size:.85rem; color:var(--gold); letter-spacing:.1em; }

/* Stat */
.stat { position: relative; padding: 1.4rem 0; }
.stat__value { font-family: var(--font-display); font-weight: 700; font-size: clamp(2.6rem, 1.6rem + 3.5vw, 4.6rem); line-height: 1; letter-spacing: -0.02em; }
.stat__value .suffix { font-size: .42em; color: var(--gold); margin-left: .15em; vertical-align: .35em; }
.stat__label { color: var(--fg-dim); font-size: .92rem; margin-top: .8rem; max-width: 22ch; }

/* Feature list with gold ticks */
.ticks li { position: relative; padding-left: 1.9rem; padding-block: .4rem; }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: .85em;
  width: 10px; height: 10px; border-right: 1.5px solid var(--gold); border-bottom: 1.5px solid var(--gold);
  transform: rotate(45deg) translateY(-50%);
}

/* Badge / chip */
.chip { display: inline-flex; align-items: center; gap: .4rem; padding: .4rem .85rem; border: 1px solid var(--border); border-radius: 999px; font-size: .78rem; color: var(--fg-dim); }
.badge-demo { background: var(--gold-soft); color: var(--gold); border:1px solid color-mix(in srgb,var(--gold) 35%,transparent); font-weight:600; letter-spacing:.06em; text-transform:uppercase; font-size:.68rem; padding:.3rem .6rem; border-radius:4px; display:inline-block; }

/* ---------- Forms --------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: .5rem; }
.field label { font-size: .82rem; font-weight: 500; color: var(--fg-dim); letter-spacing: .02em; }
.field label .req { color: var(--gold); }
.field input, .field textarea, .field select {
  width: 100%; padding: .9rem 1.05rem;
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--fg); transition: border-color .25s var(--ease), background .25s var(--ease);
}
.field input::placeholder, .field textarea::placeholder { color: color-mix(in srgb, var(--fg-dim) 85%, transparent); }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--gold); }
.field textarea { resize: vertical; min-height: 130px; }
.field.invalid input, .field.invalid textarea, .field.invalid select { border-color: #c2553f; }
.field .err { font-size: .78rem; color: #e08066; min-height: 1em; }

.checkbox { display: flex; gap: .7rem; align-items: flex-start; font-size: .88rem; color: var(--fg-dim); cursor: pointer; }
.checkbox input { width: 18px; height: 18px; margin-top: .2rem; accent-color: var(--gold); flex: none; }

.choice-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: .6rem; }
.choice {
  display: flex; align-items: center; gap: .6rem; padding: .8rem 1rem;
  border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer;
  font-size: .9rem; transition: border-color .2s, background .2s;
}
.choice:hover { border-color: color-mix(in srgb, var(--gold) 50%, transparent); }
.choice input { accent-color: var(--gold); }
.choice:has(input:checked) { border-color: var(--gold); background: var(--gold-soft); }

.form-note { font-size: .84rem; color: var(--fg-dim); }
.form-status { padding: 1rem 1.2rem; border-radius: var(--radius); font-size: .92rem; display: none; }
.form-status.ok { display: block; background: rgba(94,140,106,.14); border: 1px solid rgba(94,140,106,.4); color: #a9d5b4; }
.form-status.bad { display: block; background: rgba(194,85,63,.14); border: 1px solid rgba(194,85,63,.4); color: #e3a08d; }

/* ---------- Media / PremiumImage ----------------------------------------- */
.pimg { position: relative; overflow: hidden; background: var(--charcoal-2); border-radius: var(--radius-lg); }
.pimg::before { content: ""; display: block; padding-bottom: var(--ratio, 66%); }
.pimg img, .pimg .ph { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: var(--pos, center); }
.pimg img { opacity: 0; transition: opacity .7s var(--ease); }
.pimg img.loaded { opacity: 1; }

/* Placeholder (ảnh thật chưa có) — rõ ràng, sang trọng, có nhãn */
.ph {
  display: grid; place-items: center; text-align: center;
  background:
    radial-gradient(120% 120% at 20% 10%, #22262c 0%, #16191d 55%, #0f1215 100%);
  color: var(--muted);
}
.ph__inner { padding: 1.5rem; max-width: 80%; }
.ph__mono { font-family: var(--font-display); font-size: clamp(1.4rem,1rem+2vw,2.4rem); color: var(--gold); opacity: .85; letter-spacing: .05em; }
.ph__hint { font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; margin-top: .6rem; opacity: .6; }
.ph__grid { position:absolute; inset:0; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 46px 46px; opacity:.25; }

.img-caption { font-size: .8rem; color: var(--fg-dim); margin-top: .7rem; font-style: italic; }

/* ---------- Motion / reveal ---------------------------------------------- */
[data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .9s var(--ease), transform .9s var(--ease); will-change: opacity, transform; }
[data-reveal="left"]  { transform: translateX(-34px); }
[data-reveal="right"] { transform: translateX(34px); }
[data-reveal="scale"] { transform: scale(.94); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: .08s; }
[data-reveal-delay="2"] { transition-delay: .16s; }
[data-reveal-delay="3"] { transition-delay: .24s; }
[data-reveal-delay="4"] { transition-delay: .32s; }
[data-reveal-delay="5"] { transition-delay: .40s; }

/* Scroll progress bar */
.scroll-progress { position: fixed; top: 0; left: 0; height: 2px; width: 100%; transform-origin: left; transform: scaleX(0); background: var(--gold); z-index: 110; }

/* Custom cursor (fine pointer only) */
.cursor-ring, .cursor-dot { position: fixed; top: 0; left: 0; pointer-events: none; z-index: 300; border-radius: 50%; mix-blend-mode: difference; }
.cursor-ring { width: 34px; height: 34px; border: 1px solid rgba(255,255,255,.8); transform: translate(-50%,-50%); transition: width .25s var(--ease), height .25s var(--ease), background .25s; }
.cursor-dot { width: 5px; height: 5px; background: #fff; transform: translate(-50%,-50%); }
.cursor-ring.hover { width: 56px; height: 56px; background: rgba(255,255,255,.08); }
@media (hover: none), (pointer: coarse) { .cursor-ring, .cursor-dot { display: none; } }

/* Marquee */
.marquee { overflow: hidden; white-space: nowrap; border-block: 1px solid var(--border); padding-block: clamp(1.4rem,1rem+2vw,2.6rem); }
.marquee__track { display: inline-flex; gap: 3rem; animation: marquee 34s linear infinite; }
.marquee__track span { font-family: var(--font-display); font-size: clamp(1.8rem,1.2rem+3vw,3.4rem); opacity: .9; display: inline-flex; align-items: center; gap: 3rem; }
.marquee__track span::after { content: "—"; color: var(--gold); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* Mobile sticky CTA */
.sticky-cta { position: fixed; left: 0; right: 0; bottom: 0; z-index: 80; display: none; gap: .7rem; padding: .7rem var(--gutter); background: rgba(11,13,15,.9); backdrop-filter: blur(12px); border-top: 1px solid var(--line); }
.sticky-cta .btn { flex: 1; justify-content: center; }
@media (max-width: 1040px) { .sticky-cta { display: flex; } body { padding-bottom: 72px; } }

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1 !important; transform: none !important; transition: none !important; }
  .marquee__track { animation: none; }
  .btn::after { display: none; }
  .cursor-ring, .cursor-dot { display: none; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}