:root {
  --bg: #0d1116; --bg-surface: #141a22; --bg-raised: #1a222c;
  --text-primary: #eeebe2; --text-secondary: #b3ac9c; --text-muted: #948c7a;
  --border: #2a323d; --border-strong: #3d4756;
  --amber: #d8a45a; --seed: #c8a45e; --frost: #8fb4c7; --rust: #b0563a;
  --alu: #c9cdd4; --alu-ink: #1a2027;
  --focus: #d8a45a;
}
[data-theme="light"] {
  --bg: #f4f1e8; --bg-surface: #e9e4d4; --bg-raised: #dfd8c2;
  --text-primary: #1d1a14; --text-secondary: #57503f; --text-muted: #655d4c;
  --border: #d3cbb4; --border-strong: #a89e80;
  --amber: #8a5a12; --seed: #6e5212; --frost: #2c607e; --rust: #a34a28;
  --alu: #3a4149; --alu-ink: #f0ede4;
  --focus: #8a5a12;
}
.themebtn { display: inline-flex; align-items: center; justify-content: center;
  width: 1.9rem; height: 1.9rem; border: none; background: transparent;
  color: var(--text-secondary); cursor: pointer; border-radius: 6px; padding: 0; }
.themebtn:hover { color: var(--amber); }
.themebtn svg { display: block; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text-primary);
  font-family: Georgia, "Times New Roman", serif; line-height: 1.65; }
body[data-locked] [data-gated] { display: none; }
main { max-width: 46rem; margin: 0 auto; padding: 0 1rem 3rem; }
h1 { font-size: 2.1rem; line-height: 1.12; margin: 0.4rem 0 0.8rem; max-width: 22ch; }
h2 { font-size: 1.5rem; margin: 3rem 0 0.8rem; line-height: 1.25; }
h3 { font-size: 1.08rem; margin: 1.7rem 0 0.5rem; }
p { margin: 0.7rem 0; }
a { color: var(--frost); }
.num, .bignum, .cal-num, .ck-st, .p-age strong { font-variant-numeric: tabular-nums; }
.kicker { font-family: -apple-system, "Segoe UI", sans-serif; font-size: 0.8rem;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-secondary); margin: 1.2rem 0 0; }
.deck { font-size: 1.1rem; color: var(--text-secondary); }
.byline { font-family: -apple-system, "Segoe UI", sans-serif; font-size: 0.8rem; color: var(--text-muted); }
.note { font-size: 0.88rem; color: var(--text-secondary); }
.guard { border-left: 3px solid var(--amber); padding: 0.5rem 0.9rem;
  background: var(--bg-surface); border-radius: 0 8px 8px 0; }
.warnlabel { border: 2px solid var(--amber); border-radius: 10px; padding: 0.8rem 1rem;
  font-weight: bold; background: var(--bg-surface); }
.epistemic { font-style: italic; color: var(--text-secondary); }
/* topbar + dots */
.topbar { display: flex; align-items: center; gap: 0.8rem; padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border); position: sticky; top: 0;
  background: var(--bg); z-index: 10; }
.topbar .brand { font-weight: bold; color: var(--text-primary); text-decoration: none;
  font-family: -apple-system, "Segoe UI", sans-serif; font-size: 0.9rem; white-space: nowrap; }
nav.rail { display: flex; gap: 0.9rem; overflow-x: auto;
  font-family: -apple-system, "Segoe UI", sans-serif; font-size: 0.85rem; }
nav.rail a { color: var(--text-secondary); text-decoration: none; white-space: nowrap; }
nav.rail a[aria-current="true"] { color: var(--text-primary); font-weight: bold; }
a.lang { font-family: -apple-system, "Segoe UI", sans-serif; font-size: 0.82rem; font-weight: bold;
  border: 1px solid var(--border-strong); border-radius: 6px; padding: 0.15rem 0.5rem;
  text-decoration: none; color: var(--text-primary); white-space: nowrap; margin-left: auto; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.dots { display: none; }
@media (min-width: 1000px) {
  .dots { display: flex; flex-direction: column; gap: 0.75rem; position: fixed;
    right: 1.2rem; top: 50%; transform: translateY(-50%); z-index: 9; }
  .dots a { position: relative; width: 10px; height: 10px; border-radius: 50%;
    border: 1.5px solid var(--border-strong); background: transparent; padding: 0; }
  .dots a:hover { border-color: var(--amber); }
  .dots a[aria-current="true"] { background: var(--amber); border-color: var(--amber); }
  .dots a::after { content: attr(data-label); position: absolute; right: 1.2rem; top: 50%;
    transform: translateY(-50%); white-space: nowrap;
    font-family: -apple-system, "Segoe UI", sans-serif; font-size: 0.75rem;
    color: var(--text-secondary); background: var(--bg-surface);
    border: 1px solid var(--border); border-radius: 6px; padding: 0.15rem 0.55rem;
    opacity: 0; pointer-events: none; transition: opacity 0.15s; }
  .dots a:hover::after, .dots a:focus-visible::after { opacity: 1; }
}
/* hero + guess */
.hero { min-height: 92vh; display: flex; flex-direction: column; justify-content: center; }
.guesses { display: grid; grid-template-columns: 1fr 1fr; gap: 0.7rem; margin: 1.2rem 0; }
.guess { cursor: pointer; background: var(--bg-surface); color: var(--text-primary);
  border: 1px solid var(--border-strong); border-radius: 12px; padding: 1.1rem 0.6rem;
  font-family: Georgia, serif; }
.guess strong { font-size: 1.5rem; display: block; color: var(--amber); }
.guess:hover { border-color: var(--amber); }
.guess[aria-pressed="true"] { border-color: var(--amber); background: var(--bg-raised); }
.remark { min-height: 2.5rem; color: var(--text-secondary); font-style: italic; }
.cta { display: inline-block; font-family: -apple-system, "Segoe UI", sans-serif; font-weight: bold;
  font-size: 0.95rem; color: var(--bg); background: var(--amber); text-decoration: none;
  border-radius: 999px; padding: 0.55rem 1.2rem; }
.cta.ghost { background: transparent; color: var(--amber); border: 2px solid var(--amber); }
/* packets */
.packets { display: grid; gap: 0.8rem; margin: 1.2rem 0; }
@media (min-width: 720px) { .packets { grid-template-columns: 1fr 1fr; } }
.packet { border: 1px solid var(--border-strong); border-radius: 12px; overflow: hidden;
  background: var(--bg-surface); }
.seal { display: grid; gap: 0.15rem; width: 100%; text-align: left; cursor: pointer;
  background: var(--alu); color: var(--alu-ink); border: none; padding: 0.9rem 1rem;
  font-family: Georgia, serif; }
.p-age strong { font-size: 2rem; color: var(--alu-ink); }
.p-age small { font-size: 0.9rem; }
.p-name { font-size: 1.25rem; font-weight: bold; }
.p-sub { font-style: italic; font-size: 0.85rem; opacity: 0.75; }
.p-act { font-family: -apple-system, "Segoe UI", sans-serif; font-size: 0.8rem; font-weight: bold;
  letter-spacing: 0.05em; text-transform: uppercase; margin-top: 0.3rem; }
.p-inside { padding: 0.9rem 1rem; }
.p-inside dl { display: grid; grid-template-columns: auto 1fr; gap: 0.25rem 1rem; margin: 0 0 0.6rem; }
.p-inside dt { color: var(--text-secondary); font-size: 0.85rem;
  font-family: -apple-system, "Segoe UI", sans-serif; }
.p-inside dd { margin: 0; font-weight: bold; }
.p-inside canvas { width: 100%; height: auto; background: var(--bg); border-radius: 8px;
  border: 1px solid var(--border); }
.germbtn, .stepctl button, .sealbtns button { font-family: -apple-system, "Segoe UI", sans-serif;
  font-size: 0.9rem; font-weight: bold; padding: 0.55rem 1.1rem; border-radius: 999px;
  border: 2px solid var(--amber); background: transparent; color: var(--amber); cursor: pointer; }
.germbtn:hover, .stepctl button:hover, .sealbtns button:hover { background: var(--amber); color: var(--bg); }
.germbtn[disabled] { opacity: 0.5; cursor: default; }
.germout { font-weight: bold; color: var(--seed); }
.unk { border-left: 3px solid var(--text-muted); padding-left: 0.7rem; }
.linklike { background: none; border: none; padding: 0; cursor: pointer;
  color: var(--frost); text-decoration: underline; font-size: 0.9rem;
  font-family: -apple-system, "Segoe UI", sans-serif; }
.st-observed { color: var(--seed); }
.st-modelled, .st-modelat { color: var(--frost); }
.st-unknown, .st-necunoscut { color: var(--text-muted); }
.keylist { list-style: none; padding: 0; margin: 1rem 0; }
.keylist li { padding: 0.55rem 0; border-bottom: 1px solid var(--border); }
.keylist strong { display: block; font-family: -apple-system, "Segoe UI", sans-serif;
  font-size: 0.8rem; letter-spacing: 0.06em; }
.keylist span { display: block; font-size: 0.95rem; }
/* interval showdown */
.bignum { font-size: 2.6rem; font-weight: bold; line-height: 1.1; }
.bignum small { font-size: 1rem; font-weight: normal; color: var(--text-secondary); }
.versus { display: grid; gap: 0.6rem; margin: 1rem 0; }
@media (min-width: 720px) { .versus { grid-template-columns: 1fr auto 1fr; align-items: center; } }
.versus .old { color: var(--text-muted); }
.versus .old .bignum { color: var(--text-muted); text-decoration: line-through;
  text-decoration-thickness: 3px; text-decoration-color: var(--rust); }
.versus .new .bignum { color: var(--amber); }
.versus .arrow { font-size: 2.2rem; color: var(--amber); text-align: center; }
.cal { border: 1px solid var(--border-strong); border-radius: 12px; padding: 1rem;
  margin: 1rem 0; background: var(--bg-surface); text-align: center; }
.cal-num { font-size: 4rem; color: var(--frost); margin: 0.2rem 0; }
.cal-new { color: var(--amber); font-size: 1.2rem; }
.bignum.pair { font-size: 2rem; }
.payoff { list-style: none; padding: 0; }
.payoff li { font-size: 1.15rem; margin: 0.5rem 0; padding-left: 1.2rem; position: relative; }
.payoff li::before { content: "—"; position: absolute; left: 0; color: var(--amber); }
.shotcard blockquote { margin: 1.5rem 0; border: 2px solid var(--amber); border-radius: 14px;
  padding: 1.2rem 1.3rem; background: var(--bg-surface); }
.sc-row { display: flex; justify-content: space-between; gap: 0.8rem; align-items: baseline;
  border-top: 1px dashed var(--border); padding: 0.4rem 0; }
.sc-row strong { color: var(--amber); font-size: 1.2rem; white-space: nowrap; }
/* steps */
.steps { list-style: none; padding: 0; margin: 1rem 0; counter-reset: st; }
.steps li { display: none; border: 1px solid var(--border-strong); border-radius: 12px;
  padding: 1rem 1.1rem; background: var(--bg-surface); }
.steps li.on { display: block; }
.steps strong { display: block; color: var(--amber); letter-spacing: 0.06em; font-size: 0.85rem;
  font-family: -apple-system, "Segoe UI", sans-serif; }
.stepctl { display: flex; align-items: center; gap: 0.8rem; }
.loopnote { color: var(--seed); font-weight: bold; }
/* vault + split + timeline */
.factors { columns: 2; gap: 2rem; }
.factors li { break-inside: avoid; margin-bottom: 0.3rem; }
.split { display: grid; gap: 0.8rem; margin: 1rem 0; }
@media (min-width: 720px) { .split { grid-template-columns: 1fr 1fr; } }
.pane { border: 1px solid var(--border-strong); border-radius: 12px; padding: 1rem 1.1rem;
  background: var(--bg-surface); }
.pane.aus { border-top: 4px solid var(--seed); }
.pane.sv { border-top: 4px solid var(--frost); }
.psub { color: var(--text-secondary); font-style: italic; margin-top: -0.4rem; }
.tline { position: relative; height: 7rem; margin: 1.5rem 0 1rem; }
.t-bar { position: absolute; left: 0; right: 0; top: 1.2rem; height: 3px; background: var(--border-strong); }
.t-tick { position: absolute; top: 0.9rem; width: 2px; height: 0.9rem; background: var(--text-muted); }
.t-tick .t-lab { position: absolute; top: 1rem; left: 50%; transform: translateX(-50%);
  font-style: normal; font-size: 0.75rem; color: var(--text-secondary);
  font-family: -apple-system, "Segoe UI", sans-serif; }
.t-tick.t-first { background: var(--amber); }
.t-now { position: absolute; top: 2.6rem; }
.t-now em { font-style: normal; font-size: 0.78rem; color: var(--bg); background: var(--amber);
  border-radius: 6px; padding: 0.1rem 0.45rem; white-space: nowrap;
  font-family: -apple-system, "Segoe UI", sans-serif; font-weight: bold; }
.t-flag { position: absolute; top: 4.6rem; }
.t-flag em { font-style: normal; font-size: 0.78rem; color: var(--text-secondary); white-space: nowrap;
  font-family: -apple-system, "Segoe UI", sans-serif; }
/* clock */
.clockctl label { display: block; font-family: -apple-system, "Segoe UI", sans-serif;
  font-weight: bold; margin-bottom: 0.3rem; }
.clockctl input[type="range"] { width: 100%; accent-color: var(--amber); min-height: 2.5rem; }
.clockrows { list-style: none; padding: 0; }
.clockrows li { display: grid; grid-template-columns: 1fr; gap: 0.1rem; padding: 0.4rem 0;
  border-bottom: 1px solid var(--border); }
.ck-name { font-weight: bold; }
.ck-st { color: var(--text-secondary); font-size: 0.9rem;
  font-family: -apple-system, "Segoe UI", sans-serif; }
.ck-st.obs { color: var(--seed); font-weight: bold; }
.ck-st.fut { color: var(--text-muted); font-style: italic; }
.unknownstrip { display: flex; align-items: baseline; gap: 0.6rem; color: var(--text-muted);
  font-size: 0.8rem; border-top: 1px dashed var(--border); padding-top: 0.4rem;
  font-family: -apple-system, "Segoe UI", sans-serif; }
.unknownstrip .u-known { white-space: nowrap; }
.unknownstrip .u-trail { flex: 1; min-width: 2rem; border-bottom: 2px dotted var(--text-muted);
  opacity: 0.65; transform: translateY(-3px);
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='4' preserveAspectRatio='none'%3E%3Crect width='40' height='4' fill='black'/%3E%3Crect x='40' width='40' height='4' fill='black' opacity='.75'/%3E%3Crect x='80' width='40' height='4' fill='black' opacity='.55'/%3E%3Crect x='120' width='40' height='4' fill='black' opacity='.35'/%3E%3Crect x='160' width='40' height='4' fill='black' opacity='.15'/%3E%3C/svg%3E");
  -webkit-mask-size: 100% 100%; -webkit-mask-repeat: no-repeat;
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='4' preserveAspectRatio='none'%3E%3Crect width='40' height='4' fill='black'/%3E%3Crect x='40' width='40' height='4' fill='black' opacity='.75'/%3E%3Crect x='80' width='40' height='4' fill='black' opacity='.55'/%3E%3Crect x='120' width='40' height='4' fill='black' opacity='.35'/%3E%3Crect x='160' width='40' height='4' fill='black' opacity='.15'/%3E%3C/svg%3E");
  mask-size: 100% 100%; mask-repeat: no-repeat; }
.unknownstrip .u-lab { font-style: italic; white-space: nowrap; }
/* seal */
.sealbtns { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.8rem 0; }
.stamp { border: 2px dashed var(--amber); border-radius: 12px; padding: 1rem 1.2rem;
  margin: 1rem 0; background: var(--bg-surface); }
.stamp[hidden] { display: none; }
.st-crop { font-size: 1.4rem; font-weight: bold; margin: 0; }
/* faq */
details.faq { border: 1px solid var(--border); border-radius: 10px; padding: 0.7rem 0.9rem;
  margin: 0.6rem 0; background: var(--bg-surface); }
details.faq summary { cursor: pointer; font-weight: bold; }
details.faq p { font-size: 0.95rem; }
footer { border-top: 1px solid var(--border); padding: 1.2rem 1rem 2rem; text-align: center;
  font-family: -apple-system, "Segoe UI", sans-serif; font-size: 0.85rem; color: var(--text-secondary); }
footer a { color: var(--text-secondary); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .dots a::after { transition: none; }
}