/* ═══ Layout: rail, content grid, cards, mobile — structure adapted from
   Show Me The Money's Mission Control, restyled for Neuro Compass ═══ */

.shell { position: relative; z-index: 1; display: flex; min-height: 100vh; }

/* ── Desktop nav rail ──────────────────────────────────────────── */
.rail {
  position: sticky; top: 0; height: 100vh;
  width: 94px; flex: 0 0 94px;
  display: flex; flex-direction: column; align-items: stretch; gap: 3px;
  padding: 16px 10px;
  border-right: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 78%, transparent);
  overflow-y: auto;
}
.rail-brand { display: flex; justify-content: center; padding: 4px 0 14px; color: var(--accent); }
.rail-item {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 9px 4px; border-radius: 14px;
  color: var(--text-3); font-size: .68rem; font-weight: 700; letter-spacing: .02em;
  text-decoration: none; text-align: center;
  transition: color .15s var(--ease), background .15s var(--ease);
}
.rail-item:hover { color: var(--text-1); background: var(--panel-2); }
.rail-item.active { color: var(--accent); background: var(--accent-soft); }
.rail-icon { font-size: 1.2rem; line-height: 1; font-family: "Segoe UI Symbol", var(--font); }
.rail-spacer { flex: 1; min-height: 8px; }
.rail-item.as-button { background: none; border: none; cursor: pointer; padding: 8px 4px; border-radius: 14px; font-size: .68rem; }
.rail-item.as-button:hover { background: var(--panel-2); }

/* ── Content ───────────────────────────────────────────────────── */
.content { flex: 1; min-width: 0; padding: 22px clamp(16px, 3.2vw, 44px) 90px; max-width: 1320px; }

.topbar { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 10px; }
.topbar .sub { color: var(--text-3); font-size: .88rem; margin-top: 2px; }
.disclaimer-strip {
  display: flex; align-items: center; gap: 10px;
  font-size: .82rem; color: var(--text-2);
  background: var(--accent-2-soft); border-radius: 12px;
  padding: 7px 14px; margin-bottom: 20px;
}
.disclaimer-strip b { color: var(--accent-2); }

.view { animation: fadein .28s var(--ease); }
@keyframes fadein { from { opacity: 0; transform: translateY(6px); } }

/* ── Grids ─────────────────────────────────────────────────────── */
.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.auto { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.grid.wide-left { grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); }
.stack { display: flex; flex-direction: column; gap: 16px; }
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.section { margin: 30px 0 14px; display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.section .sub { color: var(--text-3); font-size: .86rem; }

/* ── Stat tiles ────────────────────────────────────────────────── */
.tile .t-label { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--text-2); }
.tile .t-label .swatch { width: 12px; height: 12px; border-radius: 4px; }
.tile .t-value { font-size: 2.6rem; font-weight: 700; line-height: 1.1; margin: 8px 0 4px; letter-spacing: -0.02em; }
.tile .t-value small { font-size: 1rem; color: var(--text-3); font-weight: 400; margin-left: 4px; }
.tile .t-sub { font-size: .84rem; color: var(--text-3); }
.tile .t-rule { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--border); font-size: .84rem; color: var(--text-2); }

/* ── Callouts ──────────────────────────────────────────────────── */
.callout { border-left: 4px solid var(--accent-2); background: var(--accent-2-soft); padding: 12px 16px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: .92rem; }
.callout.calm { border-left-color: var(--accent); background: var(--accent-soft); }
.callout h3 { font-family: var(--font); font-size: .95rem; font-weight: 700; margin-bottom: 2px; }
.eq-block { background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px 16px; margin: 12px 0; overflow-x: auto; }
.eq-caption { font-size: .8rem; color: var(--text-3); margin-top: 6px; text-align: center; }

/* ── Tabs ──────────────────────────────────────────────────────── */
.subtabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.subtabs button { padding: 7px 16px; font-size: .88rem; }
.subtabs button.active { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.subtabs button .swatch { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }

/* ── Charts ────────────────────────────────────────────────────── */
.chart { min-height: 320px; }
.chart-tall { min-height: 400px; }
.chart-short { min-height: 240px; }
.legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: .84rem; color: var(--text-2); margin-top: 6px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend .sw { width: 12px; height: 12px; border-radius: 3px; }
.legend .ln { width: 16px; height: 2px; }

details.math { margin-top: 10px; border-top: 1px solid var(--grid); padding-top: 8px; }
details.math summary { cursor: pointer; color: var(--accent); font-weight: 700; font-size: .9rem; }
.table-scroll { overflow-x: auto; }

.empty { text-align: center; padding: 56px 20px; color: var(--text-3); }
.empty .big { font-size: 2.4rem; margin-bottom: 8px; color: var(--accent); }

/* ── Tooltip popover ───────────────────────────────────────────── */
.idot {
  display: inline-flex; width: 18px; height: 18px; flex: none;
  align-items: center; justify-content: center; border-radius: 50%;
  border: 1px solid var(--border-strong); color: var(--text-3);
  font-size: .68rem; font-weight: 700; font-style: normal; cursor: help;
  background: var(--panel); padding: 0;
}
.idot:hover, .idot:focus-visible { border-color: var(--accent); color: var(--accent); }
.tooltip {
  position: fixed; z-index: 50; max-width: 360px;
  background: var(--panel); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-lift);
  padding: 13px 15px; font-size: .86rem; color: var(--text-2);
  animation: fadein .12s var(--ease);
}
.tooltip h4 { margin: 0 0 6px; color: var(--text-1); font-size: .9rem; }
.tooltip .refs { margin-top: 8px; font-size: .78rem; color: var(--text-3); }

/* ── Reference list ────────────────────────────────────────────── */
.ref { padding: 12px 0; border-bottom: 1px solid var(--grid); }
.ref:last-child { border-bottom: none; }
.ref .cite { font-weight: 700; }
.ref .title { color: var(--text-1); }
.ref .journal { color: var(--text-3); font-size: .86rem; font-style: italic; }
.ref .finding { color: var(--text-2); font-size: .9rem; margin-top: 4px; }

/* ── Prose pages ───────────────────────────────────────────────── */
.prose { max-width: 780px; }
.prose ul { padding-left: 1.2em; margin: .4em 0 .9em; }
.prose li { margin: .25em 0; }
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.steps > li { counter-increment: step; position: relative; padding-left: 48px; }
.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-weight: 700;
}
.pipeline { display: flex; flex-wrap: wrap; align-items: stretch; gap: 8px; margin-top: 12px; }
.pipe-step { background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 12px; font-size: .84rem; display: flex; flex-direction: column; gap: 2px; min-width: 130px; flex: 1; }
.pipe-step b { color: var(--text-1); }
.pipe-step span { color: var(--text-3); }
.pipe-arrow { align-self: center; color: var(--accent); font-weight: 700; }

/* ── Mobile ────────────────────────────────────────────────────── */
.bottombar { display: none; }

@media (max-width: 960px) {
  .grid.cols-3 { grid-template-columns: 1fr 1fr; }
  .grid.wide-left { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .rail { display: none; }
  .content { padding: 16px 16px 100px; }
  .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; }
  .topbar { flex-wrap: wrap; }
  .tile .t-value { font-size: 2.1rem; }
  .bottombar {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 40;
    justify-content: space-around;
    padding: 6px 2px calc(6px + env(safe-area-inset-bottom));
    background: color-mix(in srgb, var(--panel) 94%, transparent);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
  }
  .bottombar a { display: flex; flex-direction: column; align-items: center; gap: 1px; font-size: .6rem; font-weight: 700; color: var(--text-3); padding: 4px 4px; border-radius: 10px; text-decoration: none; min-width: 0; }
  .bottombar a span { font-size: 1.1rem; }
  .bottombar a.active { color: var(--accent); background: var(--accent-soft); }
}

@media (max-width: 520px) {
  .bottombar a { padding: 4px 2px; font-size: .54rem; }
  .bottombar a span { font-size: 1rem; }
  h1 { font-size: 1.35rem; }
}