/* ---- theme tokens ------------------------------------------------------ */
:root {
  --page:        #f9f9f7;
  --surface:     #fcfcfb;
  --ink:         #0b0b0b;
  --ink-2:       #52514e;
  --muted:       #898781;
  --grid:        #e1e0d9;
  --baseline:    #c3c2b7;
  --border:      rgba(11,11,11,0.10);
  --accent:      #2a78d6;
  --series-1:    #2a78d6;
  --series-2:    #1baf7a;
  --series-3:    #eda100;
  --seq-lo:      #cde2fb;
  --seq-hi:      #0d366b;
  --serif: "Charter", "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
:root[data-theme="dark"] {
  --page:        #0d0d0d;
  --surface:     #1a1a19;
  --ink:         #ffffff;
  --ink-2:       #c3c2b7;
  --muted:       #898781;
  --grid:        #2c2c2a;
  --baseline:    #383835;
  --border:      rgba(255,255,255,0.10);
  --accent:      #3987e5;
  --series-1:    #3987e5;
  --series-2:    #199e70;
  --series-3:    #c98500;
  --seq-lo:      #184f95;
  --seq-hi:      #cde2fb;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --page:        #0d0d0d;
    --surface:     #1a1a19;
    --ink:         #ffffff;
    --ink-2:       #c3c2b7;
    --muted:       #898781;
    --grid:        #2c2c2a;
    --baseline:    #383835;
    --border:      rgba(255,255,255,0.10);
    --accent:      #3987e5;
    --series-1:    #3987e5;
    --series-2:    #199e70;
    --series-3:    #c98500;
    --seq-lo:      #184f95;
    --seq-hi:      #cde2fb;
  }
}

/* ---- base -------------------------------------------------------------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.075rem;
  line-height: 1.65;
}
.wrap { max-width: 46rem; margin: 0 auto; padding: 0 1.25rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: 0.85em; background: var(--surface); border: 1px solid var(--border); border-radius: 4px; padding: 0.05em 0.35em; }

/* ---- header / footer --------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky; top: 0; z-index: 20;
}
.header-row { display: flex; align-items: center; justify-content: space-between; padding-top: 0.6rem; padding-bottom: 0.6rem; }
.brand { font-family: var(--serif); font-size: 1.35rem; font-weight: 700; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-dot { color: var(--accent); font-weight: 400; font-size: 1rem; }
.site-nav { display: flex; align-items: center; gap: 1.1rem; font-family: var(--sans); font-size: 0.85rem; }
.site-nav a { color: var(--ink-2); }
.theme-toggle {
  font-size: 1rem; line-height: 1; padding: 0.3rem 0.5rem;
  background: none; border: 1px solid var(--border); border-radius: 6px;
  color: var(--ink-2); cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); }
.site-footer {
  margin-top: 4rem; padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--sans); font-size: 0.85rem; color: var(--muted);
}

/* ---- paper front matter ------------------------------------------------- */
.paper { padding-top: 2.5rem; }
.paper-meta { display: flex; align-items: baseline; gap: 1rem; font-family: var(--sans); }
.badge {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.08em;
  color: var(--accent); border: 1px solid currentColor; border-radius: 999px;
  padding: 0.15rem 0.6rem;
}
.meta-date { font-size: 0.8rem; color: var(--muted); }
.paper-title { font-size: 1.9rem; line-height: 1.25; margin: 1rem 0 0.75rem; font-weight: 700; }
.title-note { font-size: 1rem; font-weight: 400; color: var(--muted); white-space: nowrap; }
.authors { font-size: 1rem; margin-bottom: 2rem; }
.author { font-weight: 600; }
.affil { color: var(--ink-2); font-size: 0.9rem; margin-top: 0.15rem; }

/* ---- sections ----------------------------------------------------------- */
h2 { font-size: 1.3rem; margin: 2.5rem 0 0.75rem; }
h3 { font-size: 1.05rem; margin: 1.75rem 0 0.5rem; }
.abstract {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem 1.4rem; margin: 0 0 1.5rem;
}
.abstract h2 { margin: 0.25rem 0 0.5rem; font-size: 1rem; text-transform: uppercase; letter-spacing: 0.08em; font-family: var(--sans); color: var(--ink-2); }
.abstract p { margin: 0.25rem 0 0.5rem; }

.toc { font-family: var(--sans); font-size: 0.9rem; margin: 1.5rem 0 0; }
.toc h2 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 0 0 0.4rem; }
.toc ol { margin: 0; padding-left: 1.2rem; columns: 2; column-gap: 2rem; }
.toc li { margin: 0.15rem 0; }
.toc a { color: var(--ink-2); }

.cite { font-size: 0.85em; vertical-align: super; line-height: 0; }

/* ---- equations ---------------------------------------------------------- */
.equation { position: relative; margin: 1rem 0; overflow-x: auto; padding-right: 3rem; }
.eq-no { position: absolute; right: 0.25rem; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 0.9rem; }

/* ---- stat tiles ---------------------------------------------------------- */
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: 0.75rem; margin: 1.25rem 0; }
.stat-tile {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 0.8rem 1rem; font-family: var(--sans);
}
.stat-label { font-size: 0.75rem; color: var(--ink-2); }
.stat-value { font-size: 1.6rem; font-weight: 650; line-height: 1.2; margin-top: 0.15rem; }
.stat-unit { font-size: 0.9rem; font-weight: 400; color: var(--ink-2); }
.stat-note { font-size: 0.72rem; color: var(--muted); margin-top: 0.1rem; }

/* ---- figures / charts ---------------------------------------------------- */
.chart-figure {
  margin: 2rem 0; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px;
  padding: 1rem 1rem 0.75rem;
}
.chart-figure figcaption {
  font-family: var(--sans); font-size: 0.82rem; color: var(--ink-2);
  line-height: 1.5; padding: 0.6rem 0.25rem 0.25rem;
}
.chart { font-family: var(--sans); }
.chart-head { display: flex; align-items: baseline; justify-content: space-between; gap: 0.5rem; padding: 0 0.25rem 0.5rem; }
.chart-title { font-size: 0.92rem; font-weight: 600; color: var(--ink); }
.chart-sub { font-size: 0.75rem; color: var(--muted); }
.chart-tools { margin-left: auto; }
.chart-tools button {
  font-family: var(--sans); font-size: 0.72rem; color: var(--ink-2);
  background: none; border: 1px solid var(--border); border-radius: 6px;
  padding: 0.15rem 0.55rem; cursor: pointer;
}
.chart-tools button:hover { color: var(--ink); }
.chart svg { display: block; width: 100%; height: auto; }
.chart-legend { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; padding: 0.4rem 0.25rem 0; font-size: 0.78rem; color: var(--ink-2); }
.chart-legend .key { display: inline-flex; align-items: center; gap: 0.4rem; }
.chart-legend .swatch { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.chart-table-wrap { overflow-x: auto; padding-top: 0.4rem; }
.chart-table-wrap[hidden] { display: none; }
.chart-table { border-collapse: collapse; font-size: 0.78rem; width: 100%; font-variant-numeric: tabular-nums; }
.chart-table th, .chart-table td { text-align: right; padding: 0.25rem 0.6rem; border-bottom: 1px solid var(--grid); }
.chart-table th:first-child, .chart-table td:first-child { text-align: left; }
.chart-tooltip {
  position: fixed; z-index: 50; pointer-events: none;
  background: var(--surface); color: var(--ink);
  border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
  font-family: var(--sans); font-size: 0.75rem; line-height: 1.45;
  padding: 0.45rem 0.65rem; max-width: 16rem;
  font-variant-numeric: tabular-nums;
}
.chart-tooltip .tt-title { font-weight: 600; margin-bottom: 0.15rem; }
.chart-tooltip .tt-row { display: flex; align-items: center; gap: 0.4rem; }
.chart-tooltip .swatch { width: 8px; height: 8px; border-radius: 2px; display: inline-block; }

/* ---- data table ----------------------------------------------------------- */
.data-table {
  border-collapse: collapse; width: 100%; margin: 1rem 0 1.5rem;
  font-family: var(--sans); font-size: 0.88rem; font-variant-numeric: tabular-nums;
}
.data-table th { text-align: left; border-bottom: 2px solid var(--baseline); padding: 0.4rem 0.75rem; font-weight: 600; }
.data-table td { border-bottom: 1px solid var(--grid); padding: 0.4rem 0.75rem; }

/* ---- references ------------------------------------------------------------ */
.refs { padding-left: 1.4rem; font-size: 0.95rem; }
.refs li { margin: 0.4rem 0; }

@media (max-width: 40rem) {
  .paper-title { font-size: 1.5rem; }
  .toc ol { columns: 1; }
}

/* ---- v2: full-paper components ------------------------------------------ */
:root { --series-4: #4a3aa7; --series-5: #e34948; }
:root[data-theme="dark"] { --series-4: #9085e9; --series-5: #e66767; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --series-4: #9085e9; --series-5: #e66767; }
}
.badge-alt { color: var(--series-2, #1baf7a); }
.paper-subtitle { font-size: 1.05rem; color: var(--ink-2); margin: 0 0 1.25rem; line-height: 1.5; }
.author-with { color: var(--ink-2); font-size: 0.95rem; }
.section-lede { color: var(--ink-2); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.statements { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin: 1.25rem 0; }
.statement {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 0.9rem 1.1rem;
}
.statement-no {
  font-family: var(--sans); font-size: 0.72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.09em; color: var(--accent);
  margin-bottom: 0.3rem;
}
.statement p { margin: 0; font-size: 0.95rem; line-height: 1.55; }
@media (max-width: 40rem) { .statements { grid-template-columns: 1fr; } }

.table-scroll { overflow-x: auto; }
.ledger-table td.ok    { color: var(--ok, #006300); font-weight: 600; font-size: 0.8rem; }
.ledger-table td.band  { color: var(--ink-2); font-weight: 600; font-size: 0.8rem; }
.ledger-table td.miss  { color: var(--series-5); font-weight: 600; font-size: 0.8rem; }
:root { --ok: #006300; } :root[data-theme="dark"] { --ok: #0ca30c; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --ok: #0ca30c; } }
.fals-table td:first-child { font-weight: 700; white-space: nowrap; }
.data-table { font-size: 0.84rem; }

.chart-legend .key.off { opacity: 0.35; }
.chart-legend button.key {
  background: none; border: none; padding: 0; font: inherit; color: inherit;
  cursor: pointer; display: inline-flex; align-items: center; gap: 0.4rem;
}
.chart-legend .swatch.line { height: 3px; border-radius: 2px; width: 14px; }

.explorer-bar {
  display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
  padding: 0 0.25rem 0.75rem; font-family: var(--sans); font-size: 0.85rem;
}
.explorer-bar select {
  font: inherit; color: var(--ink); background: var(--page);
  border: 1px solid var(--border); border-radius: 6px; padding: 0.3rem 0.5rem;
  min-width: 11rem;
}
.explorer-bar button {
  font: inherit; background: var(--page); color: var(--ink-2);
  border: 1px solid var(--border); border-radius: 6px; padding: 0.25rem 0.7rem; cursor: pointer;
}
.explorer-bar button:hover { color: var(--ink); }
.explorer-readout { margin-left: auto; color: var(--muted); font-size: 0.78rem; }
.toggle { display: inline-flex; align-items: center; gap: 0.35rem; color: var(--ink-2); cursor: pointer; }

.sim-controls {
  display: flex; gap: 1.5rem; flex-wrap: wrap; align-items: center;
  padding: 0.25rem 0.25rem 0.9rem; font-family: var(--sans); font-size: 0.85rem;
  color: var(--ink-2);
}
.sim-controls label { display: inline-flex; align-items: center; gap: 0.6rem; }
.sim-controls input[type="range"] { width: 11rem; accent-color: var(--accent); }
.sim-out { font-variant-numeric: tabular-nums; color: var(--ink); font-weight: 600; min-width: 6.5rem; }
.sim-readout {
  display: flex; gap: 1.25rem; flex-wrap: wrap; font-family: var(--sans);
  font-size: 0.82rem; color: var(--ink-2); padding: 0.6rem 0.25rem 0.2rem;
  font-variant-numeric: tabular-nums;
}

.ask-list li { margin: 0.5rem 0; }
.ask-cta { font-size: 1.05rem; margin-top: 1rem; }
.foot-note { font-size: 0.78rem; color: var(--muted); }
.refs { font-size: 0.9rem; }
.refs li { margin: 0.5rem 0; line-height: 1.5; }
.stat-value { font-size: 1.4rem; overflow-wrap: anywhere; }

/* ---- submit-a-fix form ---------------------------------------------------- */
.submit-panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  padding: 1.1rem 1.4rem 1.3rem; margin-top: 1.75rem;
}
.submit-panel h3 { margin: 0.2rem 0 0.4rem; }
#fix-form { font-family: var(--sans); font-size: 0.9rem; }
#fix-form label { display: block; margin: 0.7rem 0 0; color: var(--ink-2); }
#fix-form .req { color: var(--series-5); }
#fix-form .opt { color: var(--muted); font-size: 0.78rem; }
#fix-form input[type="text"], #fix-form input[type="email"], #fix-form textarea {
  display: block; width: 100%; margin-top: 0.25rem;
  font: inherit; color: var(--ink); background: var(--page);
  border: 1px solid var(--border); border-radius: 8px; padding: 0.5rem 0.65rem;
}
#fix-form textarea { resize: vertical; line-height: 1.5; }
#fix-form input:focus, #fix-form textarea:focus {
  outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
@media (max-width: 40rem) { .form-row { grid-template-columns: 1fr; } }
#fx-website { position: absolute; left: -9999px; height: 1px; width: 1px; opacity: 0; }
.preview-wrap { margin-top: 0.9rem; }
.preview-label {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 0.3rem;
}
.fx-preview {
  min-height: 3rem; border: 1px dashed var(--border); border-radius: 8px;
  padding: 0.6rem 0.8rem; font-family: var(--serif); font-size: 1rem;
  line-height: 1.6; overflow-x: auto; white-space: pre-wrap;
}
.fx-preview .muted-note { color: var(--muted); font-family: var(--sans); font-size: 0.8rem; }
.form-actions { display: flex; align-items: center; gap: 1rem; margin-top: 0.9rem; }
#fx-send {
  font: inherit; font-weight: 650; color: #fff; background: var(--accent);
  border: none; border-radius: 8px; padding: 0.55rem 1.3rem; cursor: pointer;
}
#fx-send:hover { filter: brightness(1.08); }
#fx-send:disabled { opacity: 0.6; cursor: default; }
#fx-status { font-size: 0.82rem; color: var(--ink-2); }
#fx-status.ok { color: var(--ok); font-weight: 600; }
#fx-status.err { color: var(--series-5); font-weight: 600; }

/* ---- objections list ------------------------------------------------------- */
.objections dt { font-weight: 700; margin: 1rem 0 0.25rem; }
.objections dd { margin: 0 0 0.5rem 0; padding-left: 1rem; border-left: 3px solid var(--grid); color: var(--ink); }