/* dear diary, foundation chrome styles (app shell only).
   Components get their own file (components.css) from the component agents;
   this file covers: reset-lite, body voices, texture overlays, focus,
   skip link, top bar, ledger badge + popover, tab bar, view containers. */

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; }
body{
  margin:0;
  background:var(--slate);
  color:var(--chalk);
  font-family:var(--sans);
  font-size:var(--fs-body);
  font-weight:var(--fw-body);
  line-height:var(--lh-body);
  min-height:100dvh;
}

/* texture overlays (spec 1.3): grain + vignette, both fixed, non-interactive */
body::before{
  content:"";
  position:fixed; inset:0; z-index:1; pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity:.045;
  mix-blend-mode:overlay;
}
body::after{
  content:"";
  position:fixed; inset:0; z-index:1; pointer-events:none;
  background:
    radial-gradient(120% 70% at 50% 0%, transparent 55%, rgba(0,0,0,.4)),
    radial-gradient(60% 40% at 8% 0%, var(--accent-glow), transparent 70%);
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]) body::before{ opacity:.09; mix-blend-mode:multiply; }
  :root:not([data-theme="dark"]) body::after{
    background:
      radial-gradient(120% 70% at 50% 0%, transparent 65%, rgba(0,0,0,.12)),
      radial-gradient(60% 40% at 8% 0%, var(--accent-glow), transparent 70%);
  }
}
:root[data-theme="light"] body::before{ opacity:.09; mix-blend-mode:multiply; }
:root[data-theme="light"] body::after{
  background:
    radial-gradient(120% 70% at 50% 0%, transparent 65%, rgba(0,0,0,.12)),
    radial-gradient(60% 40% at 8% 0%, var(--accent-glow), transparent 70%);
}

/* app content sits above the overlays; the sticky bar and fixed tab bar sit
   above scrolled content so nothing paints over the chrome */
.chrome-bar, main, .tab-bar{ position:relative; z-index:2; }
.chrome-bar, .tab-bar{ z-index:3; }

/* focus (spec 7, from t1) */
:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
  border-radius:3px;
}

/* visually hidden, screen reader only (spec 7 announcer utility) */
.sr-only{
  position:absolute; width:1px; height:1px;
  padding:0; margin:-1px; border:0;
  overflow:hidden; clip:rect(0 0 0 0); clip-path:inset(50%);
  white-space:nowrap;
}

/* skip link (spec 7) */
.skip-link{
  position:absolute; left:var(--sp-3); top:-100px; z-index:10;
  background:var(--slate-2); color:var(--chalk);
  border:1px solid var(--line); border-radius:var(--r-sm);
  padding:var(--sp-2) var(--sp-3);
  font-family:var(--mono); font-size:var(--fs-meta);
  text-decoration:none;
}
.skip-link:focus{ top:var(--sp-3); }

/* ---------- top bar ---------- */
.chrome-bar{
  position:sticky; top:0;
  display:flex; align-items:center; gap:var(--sp-3);
  padding:var(--sp-3) var(--wrap-pad-mobile);
  padding-top:calc(var(--sp-3) + env(safe-area-inset-top, 0px));
  background:color-mix(in srgb, var(--slate) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.brand{
  font-family:var(--serif);
  font-size:var(--fs-body-lg);
  color:var(--chalk);
  letter-spacing:.01em;
  margin-right:auto;
  text-decoration:none;
}
.brand .brand-dot{
  display:inline-block; width:6px; height:6px; border-radius:50%;
  background:var(--accent); margin-right:var(--sp-2); vertical-align:2px;
  animation:breathe 3.4s ease-in-out infinite;
}
@keyframes breathe{ 0%,100%{ opacity:.5 } 50%{ opacity:1 } }
@media (prefers-reduced-motion: reduce){
  .brand .brand-dot{ animation:none; }
}

/* connectivity chip (mono, quiet) */
.connectivity{
  font-family:var(--mono); font-size:var(--fs-caption);
  letter-spacing:var(--ls-caption); text-transform:uppercase;
  color:var(--chalk-faint);
}
.connectivity[data-state="offline"]{ color:var(--accent); }
@media (max-width:480px){ .connectivity{ display:none; } }

/* ---------- zero-bytes ledger badge (spec 3.5) ---------- */
.ledger-wrap{ position:relative; }
.ledger-badge{
  display:inline-flex; align-items:center; gap:var(--sp-2);
  font-family:var(--mono); font-size:var(--fs-meta);
  font-weight:var(--fw-mono-strong);
  color:var(--chalk);
  background:var(--slate-3);
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:6px var(--sp-3);
  cursor:pointer;
  min-height:32px;
}
.ledger-badge .dot{
  width:7px; height:7px; border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 6px var(--accent-glow);
}
.ledger-badge:hover{ border-color:var(--accent-dim); }
.ledger-popover{
  position:absolute; right:0; top:calc(100% + var(--sp-2));
  width:min(320px, calc(100vw - 2 * var(--wrap-pad-mobile)));
  background:var(--slate-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-dialog);
  padding:var(--sp-4);
  z-index:20;
}
.ledger-popover h2{
  font-family:var(--sans); font-size:var(--fs-body);
  font-weight:var(--fw-head); line-height:var(--lh-head);
  letter-spacing:var(--ls-head);
  margin:0 0 var(--sp-3);
}
.ledger-popover ul{
  list-style:none; margin:0 0 var(--sp-3); padding:0;
  font-family:var(--mono); font-size:var(--fs-meta);
  color:var(--chalk-dim);
}
.ledger-popover li{
  padding:6px 0;
  border-top:1px dashed var(--line);
}
.ledger-popover li:first-child{ border-top:0; }
.ledger-popover li b{ color:var(--chalk); font-weight:var(--fw-mono-strong); }
.ledger-popover .foot{
  font-family:var(--mono); font-size:var(--fs-caption);
  letter-spacing:var(--ls-caption); text-transform:uppercase;
  color:var(--chalk-faint); margin:0;
}

/* ---------- main / views ---------- */
main{
  max-width:var(--app-max);
  margin:0 auto;
  padding:var(--sp-5) var(--wrap-pad-mobile) calc(72px + env(safe-area-inset-bottom, 0px));
  width:100%;
}
main [data-view][hidden]{ display:none; }

/* ---------- tab bar (mobile bottom, desktop top) ---------- */
/* The bar is a child of .chrome-bar, whose backdrop-filter would make it the
   containing block for fixed descendants and pin the bar inside the header.
   On mobile the chrome-bar drops the blur (near-opaque bg instead) so the
   tab bar fixes to the real viewport bottom (spec 6). */
@media (max-width:900px){
  .chrome-bar{
    backdrop-filter:none;
    background:color-mix(in srgb, var(--slate) 97%, transparent);
  }
}
.tab-bar{
  position:fixed; left:0; right:0; bottom:0;
  display:flex;
  background:color-mix(in srgb, var(--slate) 92%, transparent);
  backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom, 0px);
}
.tab-bar a{
  flex:1;
  display:flex; flex-direction:column; align-items:center; gap:2px;
  padding:var(--sp-2) 0 var(--sp-2);
  min-height:48px; justify-content:center;
  font-family:var(--mono); font-size:var(--fs-caption);
  letter-spacing:var(--ls-caption); text-transform:uppercase;
  color:var(--chalk-faint);
  text-decoration:none;
}
.tab-bar a[aria-current="page"]{ color:var(--accent); }
.tab-bar a svg{ width:20px; height:20px; }

@media (min-width:901px){
  .tab-bar{
    position:static;
    order:-1;
    background:none; border-top:0;
    padding-bottom:0;
    display:flex; gap:var(--sp-4);
  }
  .chrome-bar{ flex-wrap:wrap; padding-left:var(--wrap-pad); padding-right:var(--wrap-pad); }
  .chrome-bar .tab-bar{ order:0; margin-left:auto; margin-right:var(--sp-4); flex:0 0 auto; }
  .tab-bar a{ flex:0 0 auto; flex-direction:row; gap:var(--sp-2); padding:var(--sp-2) var(--sp-2); min-height:44px; }
  .brand{ margin-right:var(--sp-6); }
  main{ padding-bottom:var(--sp-8); }
}