/* ============================================================================
   Components — MLC SKIN · Black Label
   ========================================================================== */

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed; inset-block-start: 0; inset-inline: 0; z-index: 100;
  transition: background var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out), backdrop-filter var(--dur) var(--ease-out);
  border-block-end: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(11,11,10,0.72);
  backdrop-filter: saturate(140%) blur(12px);
  border-block-end-color: var(--border-gold);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-4); min-block-size: 64px;
}
.brand { display: inline-flex; align-items: center; gap: var(--sp-3); }
.brand__mark { inline-size: 40px; height: auto; color: var(--gold); }
.brand__name {
  font-family: var(--font-display); font-weight: 600; color: var(--cream);
  font-size: 1.15rem; letter-spacing: .14em; text-transform: uppercase;
}
.nav-links { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2.25rem); list-style: none; }
.nav-links a {
  font-size: var(--fs-eyebrow); text-transform: uppercase; letter-spacing: .16em;
  color: var(--muted); font-weight: 500; padding-block: var(--sp-2); white-space: nowrap;
}
.nav-links a:hover, .nav-links a:focus-visible { color: var(--cream); }
.nav-cta { display: inline-flex; }

.nav-toggle { display: none; inline-size: 44px; block-size: 44px; align-items: center; justify-content: center; }
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after {
  content: ""; display: block; inline-size: 22px; block-size: 1.5px; background: var(--cream);
  transition: transform var(--dur) var(--ease-out), opacity var(--dur) var(--ease-out);
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before { position: absolute; inset-block-start: -7px; }
.nav-toggle__bars::after  { position: absolute; inset-block-start: 7px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after  { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-size: var(--fs-eyebrow); font-weight: 600; text-transform: uppercase;
  letter-spacing: .18em; padding: 0.95em 1.8em; border-radius: var(--r-sm);
  transition: background var(--dur) var(--ease-out), color var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
  border: 1px solid var(--gold);
}
.btn--gold { color: var(--bg); background: var(--gold); }
.btn--gold:hover { background: var(--gold-hi); border-color: var(--gold-hi); color: var(--bg); box-shadow: var(--glow-gold); }
.btn--ghost { color: var(--gold-bright); background: transparent; }
.btn--ghost:hover { color: var(--bg); background: var(--gold); }
.btn--sm { padding: 0.7em 1.3em; }

/* ---------- Hairline divider with center ornament ---------- */
.rule { display: flex; align-items: center; gap: var(--sp-4); }
.rule::before, .rule::after { content: ""; height: 1px; flex: 1; background: linear-gradient(90deg, transparent, var(--border-gold), transparent); }
.rule__mark { inline-size: 26px; height: auto; flex: none; color: var(--gold); }
.rule--center { justify-content: center; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-block-size: 100svh; display: flex; align-items: center;
  padding-block: 96px var(--section-y); overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    linear-gradient(180deg, rgba(11,11,10,.30) 0%, rgba(11,11,10,.55) 42%, var(--bg) 88%),
    url("../assets/hero-mountains.webp") top center / 100% auto no-repeat,
    var(--bg);
}
.hero__bg::after { /* cool atmospheric tint on the peaks */
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(80% 50% at 50% 0%, rgba(22,27,34,.45), transparent 70%);
}
.hero .container { position: relative; z-index: 2; }
.hero__inner { display: grid; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero__copy { max-width: 38rem; }
.hero__title { margin-block: var(--sp-4) var(--sp-3); text-transform: uppercase; letter-spacing: 0.06em; }
.hero__accent {
  font-family: var(--font-display); font-style: italic; font-weight: 500;
  font-size: var(--fs-h2); color: var(--gold); line-height: 1.1;
}
.hero__sub { color: var(--text); font-size: var(--fs-lead); margin-block-start: var(--sp-6); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--sp-4); margin-block-start: var(--sp-8); }
.hero__scroll {
  position: absolute; inset-block-end: var(--sp-8); inset-inline-start: 50%; transform: translateX(-50%);
  z-index: 2; color: var(--muted); font-size: var(--fs-eyebrow); letter-spacing: var(--ls-caps);
  text-transform: uppercase; display: flex; flex-direction: column; align-items: center; gap: var(--sp-2);
}
.hero__scroll span { inline-size: 1px; block-size: 38px; background: linear-gradient(var(--gold), transparent); animation: drift 2.4s var(--ease-inout) infinite; }
@keyframes drift { 0%,100%{ transform: scaleY(.5); transform-origin: top; opacity:.4 } 50%{ transform: scaleY(1); opacity:1 } }

/* ---------- Statement ---------- */
.statement .container { display: grid; gap: var(--sp-12); }
.statement__lead { font-family: var(--font-display); font-size: var(--fs-statement); line-height: 1.12; color: var(--cream); font-weight: 500; max-width: 20ch; }
.statement__lead em { color: var(--gold); }
.statement__cols { display: grid; gap: var(--sp-8); }
.statement__cols p { color: var(--muted); }
.statement__cols p strong { color: var(--cream); font-weight: 600; }

/* ---------- The System (3 products) ---------- */
.system__head { text-align: center; display: grid; justify-items: center; gap: var(--sp-4); margin-block-end: var(--sp-16); }
.system-grid { display: grid; gap: var(--sp-6); }
.product-card {
  position: relative; padding: var(--sp-8); border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  display: grid; gap: var(--sp-4); align-content: start; transition: border-color var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}
.product-card:hover { border-color: var(--border-gold); box-shadow: var(--glow-gold); transform: translateY(-4px); }
.product-card__num {
  inline-size: 44px; block-size: 44px; border: 1px solid var(--gold); border-radius: var(--r-circle);
  display: grid; place-items: center; font-family: var(--font-display); color: var(--gold); font-size: 1.1rem;
}
.product-card h3 { color: var(--cream); }
.product-card__role { font-size: var(--fs-eyebrow); text-transform: uppercase; letter-spacing: var(--ls-caps); color: var(--muted); }
.product-card p { color: var(--muted); font-size: 0.95rem; }
.product-card__featured { background: var(--surface-2); border-color: var(--border-gold); }
.product-card__soon { align-self: start; margin-block-start: var(--sp-3); padding: .35em .8em; border: 1px solid var(--border-gold); border-radius: var(--r-pill); font-size: var(--fs-eyebrow); text-transform: uppercase; letter-spacing: .16em; color: var(--muted); }

/* ---------- Why it works (feature grid) ---------- */
.why-grid { display: grid; gap: var(--sp-8) var(--sp-12); }
.feature { display: grid; grid-template-columns: auto 1fr; gap: var(--sp-4); align-items: start; }
.ring {
  inline-size: 52px; block-size: 52px; flex: none; border: 1px solid var(--gold); border-radius: var(--r-circle);
  display: grid; place-items: center; color: var(--gold);
}
.ring svg { inline-size: 24px; block-size: 24px; }
.feature h3 { font-size: var(--fs-eyebrow); font-family: var(--font-body); text-transform: uppercase; letter-spacing: var(--ls-caps); color: var(--gold); font-weight: 600; margin-block-end: var(--sp-2); }
.feature p { color: var(--muted); font-size: 0.95rem; }

/* ---------- Product spotlight ---------- */
.spotlight__grid { display: grid; gap: var(--sp-16); align-items: center; }
.spotlight__media { position: relative; }
.spotlight__media img { width: 100%; aspect-ratio: 500/480; object-fit: cover; border: 1px solid var(--border); border-radius: var(--r-sm); }
.spotlight__media::after { content: ""; position: absolute; inset: 0; box-shadow: var(--elev-card); pointer-events: none; border-radius: var(--r-sm); }
.spec-list { display: grid; gap: var(--sp-8); }
.spec h3 { display: flex; align-items: center; gap: var(--sp-3); font-family: var(--font-body); font-size: var(--fs-eyebrow); text-transform: uppercase; letter-spacing: var(--ls-caps); color: var(--gold); font-weight: 600; margin-block-end: var(--sp-3); }
.spec h3 .ring { inline-size: 34px; block-size: 34px; }
.spec h3 .ring svg { inline-size: 16px; block-size: 16px; }
.spec ul { list-style: none; padding: 0; display: grid; gap: var(--sp-2); }
.spec li { position: relative; padding-inline-start: var(--sp-6); color: var(--text); font-size: 0.95rem; }
.spec li::before { content: ""; position: absolute; inset-inline-start: 0; inset-block-start: .65em; inline-size: 6px; block-size: 6px; background: var(--gold); transform: rotate(45deg); }
.spec p { color: var(--text); }

/* ---------- Positioning (compare) ---------- */
.positioning .container { display: grid; gap: var(--sp-16); justify-items: center; text-align: center; }
.compare { display: grid; gap: var(--sp-6); inline-size: 100%; }
.compare__col { border: 1px solid var(--border); padding: var(--sp-8); display: grid; gap: var(--sp-3); }
.compare__col h3 { font-family: var(--font-body); font-size: var(--fs-eyebrow); text-transform: uppercase; letter-spacing: var(--ls-caps); color: var(--muted); font-weight: 600; }
.compare__col ul { list-style: none; padding: 0; display: grid; gap: var(--sp-1); color: var(--muted); font-size: 0.95rem; }
.positioning__payoff { font-family: var(--font-display); font-size: var(--fs-statement); line-height: 1.15; color: var(--cream); max-width: 18ch; }
.positioning__payoff em { color: var(--gold); }

/* ---------- Provenance ---------- */
.provenance { text-align: center; }
.provenance .container { display: grid; justify-items: center; gap: var(--sp-6); }
/* ---------- Close / CTA ---------- */
.close { text-align: center; }
.close .container { display: grid; justify-items: center; gap: var(--sp-6); }
.close__title { font-size: var(--fs-statement); max-width: 16ch; }
.close__title em { color: var(--gold); }
.contact { display: grid; justify-items: center; gap: var(--sp-3); margin-block-start: var(--sp-2); }
.contact__alt { font-size: var(--fs-eyebrow); letter-spacing: .04em; color: var(--muted); }

/* ---------- Footer ---------- */
.site-footer { border-block-start: 1px solid var(--border); padding-block: var(--sp-16) var(--sp-12); color: var(--muted); }
.site-footer .container { display: grid; gap: var(--sp-12); }
.footer-top { display: grid; gap: var(--sp-8); }
.footer-brand { display: grid; gap: var(--sp-4); max-width: 28rem; }
.footer-brand p { color: var(--muted); font-size: 0.9rem; }
.footer-cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-8); }
.footer-cols h3 { font-size: var(--fs-eyebrow); text-transform: uppercase; letter-spacing: var(--ls-caps); color: var(--gold); font-weight: 600; margin-block-end: var(--sp-4); font-family: var(--font-body); }
.footer-cols ul { list-style: none; padding: 0; display: grid; gap: var(--sp-2); }
.footer-cols a { color: var(--muted); font-size: 0.9rem; }
.footer-cols a:hover { color: var(--cream); }
.footer-bottom { display: flex; flex-wrap: wrap; gap: var(--sp-4); justify-content: space-between; align-items: center; padding-block-start: var(--sp-8); border-block-start: 1px solid var(--border); font-size: var(--fs-eyebrow); letter-spacing: .08em; text-transform: uppercase; color: var(--text-floor); }

/* ============================================================================
   Responsive — mobile-first; layer up at 768 and 1280
   ========================================================================== */
@media (max-width: 899px) {
  .nav-links[role="list"] {
    position: fixed; inset: 64px 0 auto 0; flex-direction: column; align-items: flex-start;
    gap: 0; background: rgba(11,11,10,0.96); backdrop-filter: blur(14px);
    border-block-end: 1px solid var(--border-gold); padding: var(--sp-4) var(--gutter) var(--sp-8);
    transform: translateY(-12px); opacity: 0; pointer-events: none; visibility: hidden;
    transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out), visibility 0s linear var(--dur);
  }
  .nav-links.is-open { transform: none; opacity: 1; pointer-events: auto; visibility: visible;
    transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out), visibility 0s; }
  .nav-links a { inline-size: 100%; padding-block: var(--sp-4); border-block-end: 1px solid var(--border); font-size: 0.95rem; }
  .nav-links .nav-cta { margin-block-start: var(--sp-4); }
  .nav-toggle { display: inline-flex; }
}

@media (min-width: 768px) {
  .section { scroll-margin-top: 80px; }
  .statement .container { grid-template-columns: 1fr 1fr; align-items: center; }
  .statement__cols { grid-template-columns: 1fr 1fr; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .compare { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1.4fr 1fr; }
  .footer-cols { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 900px) {
  .system-grid { grid-template-columns: repeat(3, 1fr); }
  .spotlight__grid { grid-template-columns: 0.9fr 1.1fr; }
}

@media (min-width: 1280px) {
  .hero__copy { max-width: 42rem; }
  .why-grid { grid-template-columns: repeat(3, 1fr); column-gap: var(--sp-24); }
  .spotlight__grid { gap: var(--sp-32); }
  .statement__cols { column-gap: var(--sp-16); }
}