/* ============================================================
   PAX SILICA — chrome.css
   Persistent navigation: dossier rail (desktop), top bar +
   fullscreen index overlay (mobile), progress + clock readouts.
   ============================================================ */

.rail {
  position: fixed; left: 0; top: 0; bottom: 0; z-index: var(--z-rail);
  width: var(--rail-w);
  display: none;
  flex-direction: column;
  border-right: 1px solid var(--line-faint);
  background:
    linear-gradient(180deg, rgba(10, 15, 30, .92), rgba(6, 9, 18, .95));
}
@media (min-width: 1080px) { .rail { display: flex; } }

.rail__brand {
  padding: 1.3rem 1.25rem 1.05rem;
  border-bottom: 1px solid var(--line-faint);
}
.rail__brand .wordmark {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.28rem; letter-spacing: .12em; color: var(--ink-hi);
  line-height: 1.1;
}
.rail__brand .wordmark b { color: var(--gold-bright); font-weight: 700; }
.rail__brand .subclass {
  margin-top: .4rem; display: block;
  font-family: var(--font-mono); font-size: .56rem; letter-spacing: .3em;
  text-transform: uppercase; color: var(--ink-dim);
}

.rail__list { list-style: none; margin: 0; padding: .8rem 0; flex: 1; overflow-y: auto; }
.rail__link {
  display: grid; grid-template-columns: 2.2rem 1fr; align-items: baseline; gap: .55rem;
  width: 100%; text-align: left;
  padding: .58rem 1.25rem .58rem 1rem;
  color: var(--ink-dim);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .2s ease, background .2s ease, border-color .2s ease;
}
.rail__code {
  font-family: var(--font-mono); font-size: .6rem; letter-spacing: .14em;
  color: var(--ink-dim);
}
.rail__label {
  font-family: var(--font-body); font-weight: 500;
  font-size: .78rem; letter-spacing: .06em; text-transform: uppercase;
}
.rail__link:hover { color: var(--ink-hi); background: rgba(120, 150, 210, .06); }
.rail__link.is-active {
  color: var(--ink-hi);
  border-left-color: var(--gold);
  background: linear-gradient(90deg, rgba(242,182,60,.09), transparent 70%);
}
.rail__link.is-active .rail__code { color: var(--gold-bright); }

.rail__foot {
  border-top: 1px solid var(--line-faint);
  padding: .85rem 1.25rem 1rem;
  display: grid; gap: .5rem;
}
.rail__progress { display: flex; justify-content: space-between; align-items: baseline; }
.rail__progress .value { font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; color: var(--ink-hi); }
.rail__bar { height: 3px; background: rgba(126,152,208,.16); position: relative; overflow: hidden; }
.rail__bar i {
  position: absolute; inset: 0 auto 0 0; width: 0%;
  background: linear-gradient(90deg, var(--blue), var(--cyan), var(--gold));
  box-shadow: 0 0 10px rgba(69,216,255,.7);
}
.rail__meta {
  display: flex; justify-content: space-between; gap: .6rem;
  font-family: var(--font-mono); font-size: .58rem; letter-spacing: .16em;
  color: var(--ink-dim); text-transform: uppercase;
}
.rail__clock b { color: var(--green); font-weight: 500; }

/* ---------- mobile top bar ------------------------------------------- */

.topbar {
  position: sticky; top: 0; z-index: var(--z-topbar);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: .65rem clamp(.9rem, 4vw, 1.6rem);
  background: rgba(6, 9, 18, .88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-faint);
}
@media (min-width: 1080px) { .topbar { display: none; } }
.topbar__brand {
  display: flex; align-items: baseline; gap: .6rem; text-decoration: none;
}
.topbar__brand .wm {
  font-family: var(--font-display); font-weight: 700; font-size: 1.02rem;
  letter-spacing: .12em; color: var(--ink-hi);
}
.topbar__brand .wm b { color: var(--gold-bright); }
.topbar__brand .sec {
  font-family: var(--font-mono); font-size: .58rem; letter-spacing: .22em;
  color: var(--ink-dim); text-transform: uppercase;
}
.menu-btn {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .26em; text-transform: uppercase;
  color: var(--ink-body);
  border: 1px solid var(--line-strong);
  padding: .45em .8em;
  transition: border-color .2s ease, color .2s ease;
}
.menu-btn:hover { border-color: var(--gold-a45); color: var(--ink-hi); }
.menu-btn .burger { display: inline-grid; gap: 3px; }
.menu-btn .burger i { width: 14px; height: 1.5px; background: currentColor; }

.mnav {
  position: fixed; inset: 0; z-index: var(--z-menu);
  background: rgba(4, 6, 13, .96);
  backdrop-filter: blur(14px);
  display: grid; align-content: start; gap: .4rem;
  padding: 4.4rem 1.4rem 2rem;
  transform: translateY(-102%);
  visibility: hidden;
  transition: transform .42s var(--ease-boot), visibility 0s linear .42s;
  overflow-y: auto;
}
.mnav.is-open { transform: none; visibility: visible; transition: transform .42s var(--ease-boot); }
.mnav__close {
  position: absolute; top: .9rem; right: 1.2rem;
  font-family: var(--font-mono); font-size: .64rem; letter-spacing: .24em; color: var(--ink-mid);
  border: 1px solid var(--line-strong); padding: .5em .9em;
}
.mnav a {
  display: grid; grid-template-columns: 3rem 1fr; align-items: baseline;
  padding: .72rem .4rem;
  color: var(--ink-body); text-decoration: none;
  border-bottom: 1px solid var(--line-faint);
}
.mnav a:hover, .mnav a.is-active { color: var(--ink-hi); background: rgba(120,150,210,.05); }
.mnav .code { font-family: var(--font-mono); font-size: .66rem; letter-spacing: .18em; color: var(--gold-bright); }
.mnav .lbl { font-weight: 500; letter-spacing: .08em; text-transform: uppercase; font-size: .92rem; }
.mnav__foot {
  margin-top: 1.4rem; font-family: var(--font-mono); font-size: .6rem; letter-spacing: .18em;
  color: var(--ink-dim); text-transform: uppercase;
}