/* nav.css: top bar with pill links + sliding marker, scroll island, menu panel / mobile sheet */

/* top bar */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  padding-top: 20px;
  transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.nav-mono, .isl-mono {
  font-family: var(--f-head); font-weight: 600; letter-spacing: -.04em;
  display: inline-grid; place-items: center;
}
.nav-mono { font-size: 20px; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--rule-2); }
.nav-mono:hover { border-color: var(--ink); }

.nav-pill {
  position: relative; display: none;
  padding: 5px; border-radius: 999px;
  background: rgba(17, 17, 20, .62);
  border: 1px solid var(--rule);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.nav-links { display: flex; position: relative; z-index: 1; }
.nav-links a {
  display: block; padding: 9px 18px; border-radius: 999px;
  font-family: var(--f-head); font-size: 15px; color: var(--ink-2);
  transition: color .25s var(--ease);
}
.nav-links a:hover, .nav-links a:focus-visible, .nav-links a.is-on { color: var(--ink); }
.nav-links a:focus-visible { outline-offset: -2px; }
.nav-mk {
  position: absolute; left: 0; bottom: 6px; height: 2px; width: 0;
  background: var(--accent); border-radius: 2px; opacity: 0;
  transition: transform .4s var(--ease), width .4s var(--ease), opacity .25s var(--ease);
}
.nav-pill .nav-cta {
  margin-left: 4px; padding: 9px 18px; border-radius: 999px;
  background: var(--ink); color: #0A0A0B; font-family: var(--f-head); font-size: 15px;
  transition: background .25s var(--ease);
}
.nav-pill .nav-cta:hover { background: var(--accent); }

@media (min-width: 768px) {
  .nav-pill { display: flex; align-items: center; }
  .is-scrolled .nav { opacity: 0; transform: translateY(-16px); pointer-events: none; }
}
@media (max-width: 767px) {
  .nav { display: none; }
}

/* island */
.isl {
  position: fixed; top: 14px; left: 50%; z-index: 60;
  display: flex; align-items: center; gap: 12px;
  padding: 5px 5px 5px 6px; border-radius: 999px;
  background: rgba(17, 17, 20, .78);
  border: 1px solid var(--rule-2);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, .45);
  transform: translate(-50%, 0);
  transition: opacity .35s var(--ease), transform .45s var(--ease), visibility .35s;
}
.isl-mono { width: 36px; height: 36px; border-radius: 50%; background: var(--ink); color: #0A0A0B; font-size: 15px; }
.isl-sec {
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase;
  color: var(--ink-2); min-width: 78px; text-align: center;
}
.isl-sec::before {
  content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); margin-right: 8px; vertical-align: 1px;
}
.isl-btn {
  height: 36px; padding: 0 16px; border-radius: 999px;
  border: 1px solid var(--rule-2); font-family: var(--f-head); font-size: 14px;
  transition: background .25s var(--ease), color .25s var(--ease);
}
.isl-btn:hover, .isl-btn[aria-expanded="true"] { background: var(--ink); color: #0A0A0B; }

@media (min-width: 768px) {
  body:not(.is-scrolled) .isl { opacity: 0; visibility: hidden; transform: translate(-50%, -24px); }
}

/* menu */
.mm { position: fixed; inset: 0; z-index: 55; visibility: hidden; }
.mm.is-open { visibility: visible; }
.mm-bg {
  position: absolute; inset: 0; background: rgba(5, 5, 6, .55);
  opacity: 0; transition: opacity .35s var(--ease);
}
.mm.is-open .mm-bg { opacity: 1; }
.mm-panel {
  position: absolute; background: var(--bg-2); border: 1px solid var(--rule-2);
  display: flex; flex-direction: column;
  opacity: 0; transition: opacity .35s var(--ease), transform .45s var(--ease);
}
.mm.is-open .mm-panel { opacity: 1; transform: none; }

/* phone: full sheet */
.mm-panel {
  inset: 0; border: 0; padding: 76px var(--gutter) 28px;
  transform: translateY(-12px);
}
@media (min-width: 768px) {
  .mm-panel {
    inset: 68px auto auto 50%; width: 400px; padding: 10px;
    border: 1px solid var(--rule-2); border-radius: 22px;
    transform: translate(-50%, -10px);
    box-shadow: 0 24px 80px rgba(0, 0, 0, .6);
  }
  .mm.is-open .mm-panel { transform: translate(-50%, 0); }
}

.mm-links { display: grid; gap: 2px; }
.mm-links a {
  display: grid; gap: 2px; padding: 16px 14px; border-radius: 14px;
  transition: background .2s var(--ease);
}
.mm-links a:hover, .mm-links a:focus-visible { background: var(--bg-3); }
.mm-name { font-family: var(--f-head); font-size: 30px; line-height: 1.1; letter-spacing: -.02em; }
.mm-desc { color: var(--ink-2); font-size: 15px; }
.mm-links a:hover .mm-name { color: var(--accent); }
@media (min-width: 768px) { .mm-name { font-size: 22px; } }

.mm-foot {
  display: flex; gap: 20px; margin-top: auto; padding: 18px 14px 6px;
  border-top: 1px solid var(--rule);
  font-family: var(--f-mono); font-size: 13px; color: var(--ink-2);
}
@media (min-width: 768px) { .mm-foot { margin-top: 8px; } }
.mm-foot a:hover { color: var(--ink); }

@media (prefers-reduced-motion: reduce) {
  .nav, .isl, .mm-bg, .mm-panel, .nav-mk { transition: none !important; }
}