/* ============================================================
   YelloGem — Components: nav, buttons, gem, marquee, phone
   ============================================================ */

/* ---------------- NAV ---------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 80;
  display: flex; align-items: center; justify-content: space-between;
  padding: clamp(16px, 2vw, 26px) var(--gutter);
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), padding 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(10,10,11,0.72);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  border-bottom-color: var(--line);
  padding-top: 14px; padding-bottom: 14px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--f-display);
  font-weight: 700; font-size: 1.18rem; letter-spacing: -0.02em;
}
.brand .gmark { width: 26px; height: 26px; flex: none; }
.brand b { font-weight: 700; }
.nav-links {
  display: flex; align-items: center; gap: clamp(18px, 2.4vw, 40px);
}
.nav-links a {
  font-family: var(--f-mono);
  font-size: 0.74rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--tx-mut); position: relative; padding: 6px 0;
  transition: color 0.3s var(--ease);
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
  background: var(--gem); transition: width 0.35s var(--ease);
}
.nav-links a:hover { color: var(--tx); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--tx); }
.nav-links a.active::after { width: 100%; }
.nav-cta { display: inline-flex; }
.nav-cta::after { display: none; }
@media (max-width: 880px) {
  .nav-links .nl-hide { display: none; }
}

/* ---------------- BUTTONS ---------------- */
.btn {
  --pad-y: 0.95em; --pad-x: 1.4em;
  position: relative; display: inline-flex; align-items: center; gap: 0.7em;
  font-family: var(--f-mono); font-size: 0.78rem; letter-spacing: 0.12em;
  text-transform: uppercase; font-weight: 500;
  padding: var(--pad-y) var(--pad-x);
  border-radius: 100px; border: 1px solid var(--line);
  color: var(--tx); overflow: hidden; isolation: isolate;
  transition: color 0.4s var(--ease), border-color 0.4s var(--ease);
}
.btn .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--gem); flex: none; transition: transform 0.4s var(--ease); }
.btn::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--gem); transform: translateY(101%); border-radius: 100px;
  transition: transform 0.5s var(--ease);
}
.btn:hover { color: #0A0A0B; border-color: var(--gem); }
.btn:hover::before { transform: translateY(0); }
.btn:hover .dot { background: #0A0A0B; transform: scale(1.25); }

.btn.solid { background: var(--gem); color: #0A0A0B; border-color: var(--gem); }
.btn.solid .dot { background: #0A0A0B; }
.btn.solid::before { background: #0A0A0B; }
.btn.solid:hover { color: var(--gem); border-color: #0A0A0B; }
.btn.solid:hover .dot { background: var(--gem); }

.btn.ghost-ink { color: var(--tx-ink); border-color: var(--line-ink); }
.btn.ghost-ink:hover { color: var(--gem); border-color: #0A0A0B; }
.btn.ghost-ink::before { background: #0A0A0B; }

/* arrow link */
.arrow-link {
  display: inline-flex; align-items: center; gap: 0.6em;
  font-family: var(--f-mono); font-size: 0.78rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--tx);
}
.arrow-link svg { width: 16px; height: 16px; transition: transform 0.4s var(--ease); }
.arrow-link:hover svg { transform: translateX(5px); }

/* ---------------- THE GEM (hero motif) ---------------- */
.gem-stage {
  position: relative;
  width: clamp(180px, 21vw, 310px);
  aspect-ratio: 1;
  display: grid; place-items: center;
  pointer-events: none;
}
.gem-svg { width: 100%; height: 100%; overflow: visible; transform-style: preserve-3d; }
.gem-svg .facet { transition: opacity 0.6s var(--ease); }
.gem-svg .f-table { fill: rgba(246,246,244,0.05); }
.gem-svg .f-gem   { fill: var(--gem); }
.gem-svg .f-gem2  { fill: var(--gem); opacity: 0.28; }
.gem-svg .facet:not(.f-gem):not(.f-gem2):not(.f-table) { fill: rgba(246,246,244,0.02); }
.gem-svg .gem-out { fill: none; stroke: var(--tx); stroke-width: 2.4; stroke-linejoin: round; }
.gem-svg .gem-ln  { stroke: var(--tx); stroke-width: 1.1; opacity: 0.45; }
.gem-rotor { transform-box: fill-box; transform-origin: center; animation: gemSpin 26s linear infinite; }
@keyframes gemSpin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .gem-rotor { animation: none; } }
.gem-halo {
  position: absolute; inset: -14%;
  background: radial-gradient(circle at 50% 50%, var(--gem-glow), transparent 62%);
  filter: blur(28px); opacity: 0.55; z-index: -1;
  animation: haloBreathe 5s var(--ease-io) infinite;
}
@keyframes haloBreathe { 0%,100% { opacity: 0.4; transform: scale(0.94); } 50% { opacity: 0.7; transform: scale(1.06); } }

/* ---------------- MARQUEE ---------------- */
.marquee {
  --speed: 38s;
  position: relative; overflow: hidden;
  border-block: 1px solid var(--line);
  padding-block: clamp(7px, 0.9vw, 12px);
  background: var(--ink-1);
}
.marquee-track {
  display: flex; width: max-content; gap: 0;
  animation: marq var(--speed) linear infinite;
}
.marquee.rev .marquee-track { animation-direction: reverse; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marq { to { transform: translateX(-50%); } }
.marquee-item {
  display: inline-flex; align-items: center; gap: 0.6em;
  font-family: var(--f-mono); font-weight: 500;
  font-size: clamp(0.8rem, 1.4vw, 1.15rem); letter-spacing: 0.02em;
  padding-inline: clamp(12px, 1.6vw, 26px);
  color: transparent; -webkit-text-stroke: 1px var(--tx-mut);
  white-space: nowrap;
}
.marquee-item .sep { color: var(--gem); -webkit-text-stroke: 0; font-size: 0.7em; }
.marquee-item.out {
  color: transparent; -webkit-text-stroke: 1px var(--tx-mut);
}

/* ---------------- iPHONE FRAME ---------------- */
.phone {
  position: relative;
  width: var(--pw, 300px);
  aspect-ratio: 1179 / 2556;
  border-radius: 13% / 6%;
  background: linear-gradient(160deg, #2a2a2e, #161618 60%, #0c0c0d);
  padding: 2.6%;
  box-shadow:
    0 2px 4px rgba(0,0,0,0.6),
    0 40px 80px -30px rgba(0,0,0,0.9),
    inset 0 0 0 1px rgba(255,255,255,0.06);
}
.phone::before { /* side button */
  content:""; position:absolute; right:-2px; top:26%; width:3px; height:9%;
  background: linear-gradient(#3a3a3e,#1a1a1c); border-radius: 0 3px 3px 0;
}
.phone-screen {
  position: relative; width: 100%; height: 100%;
  border-radius: 11% / 5.2%; overflow: hidden;
  background: var(--ink-2);
}
.phone-screen image-slot, .phone-screen .ph-fallback { width: 100%; height: 100%; }
.phone-notch {
  position: absolute; top: 1.6%; left: 50%; transform: translateX(-50%);
  width: 32%; height: 3.4%; background: #08080a; border-radius: 100px; z-index: 5;
}
.ph-fallback {
  display: grid; place-content: center; gap: 14px; text-align: center;
  padding: 14% 10%;
  background:
    radial-gradient(120% 80% at 50% 0%, var(--ink-3), var(--ink-2) 70%);
}
.ph-fallback .pf-mark { width: 46px; height: 46px; margin: 0 auto; opacity: 0.9; }
.ph-fallback small {
  font-family: var(--f-mono); font-size: 0.6rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--tx-dim); line-height: 1.6;
}