/* ==========================================================================
   Faros de la Galaxia — page styles (aula/sims/faros-de-la-galaxia)
   Foster Aula tokens from sims.css; the reference card's instrument-panel
   identity on top: deep navy, cyan beams, monospace numerals. Every colour
   encodes something a legend names (spec, Design).
   ========================================================================== */
#fa-app, .fa-dialog, .fa-intro {
  --fa-beam: #9fe7e3; --fa-beam-soft: rgba(159, 231, 227, 0.14); --fa-beam-line: rgba(159, 231, 227, 0.4);
  --fa-sun: #f5c46b; --fa-alert: #ff7a6b; --fa-ok: #7fe0a8;
  /* classes: Okabe–Ito, lightened for a dark ground; shapes differ too */
  --c-normal: #56b4e9; --c-msp: #e69f00; --c-mspbin: #f0e442; --c-young: #3ec99a; --c-magnetar: #ff8a50; --c-binary: #cc79a7; --c-other: #a9a9b8;
}
.fa-sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
/* .sim-page's shorthand padding cancels .wrap's gutters; this page keeps them (16 px on phones) */
.sim-page.fa-page { padding-inline: clamp(16px, 4vw, 48px); }
#fa-app { display: flex; flex-direction: column; gap: 18px; scroll-margin-top: 104px; }
#fa-app button { font-family: var(--f-body); }
#fa-app :focus-visible, .fa-dialog :focus-visible { outline: 2px solid var(--gold-bright); outline-offset: 2px; }

/* ---------------------------------------------------------------- the chapter bar */
#fa-app .fa-top { display: flex; flex-wrap: wrap; gap: 12px 16px; align-items: center; justify-content: space-between; }
#fa-app .fa-chapters { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; max-width: 100%; min-width: 0; padding: 2px; box-sizing: border-box; }
#fa-app .fa-chapters::-webkit-scrollbar { display: none; }
#fa-app .fa-chtab { appearance: none; display: inline-flex; align-items: center; gap: 8px; flex: 0 0 auto; min-height: 44px; padding: 7px 14px 7px 8px; border-radius: 100px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-1); cursor: pointer; font-size: 0.86rem; font-weight: 500; transition: all var(--t-fast) var(--ease); }
#fa-app .fa-chtab:hover { border-color: var(--gold); color: var(--text-0); }
#fa-app .fa-chtab .n { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font: 600 0.8rem var(--f-mono); color: var(--text-2); border: 1px solid var(--border-strong); flex: 0 0 auto; }
#fa-app .fa-chtab svg { width: 16px; height: 16px; display: none; }
#fa-app .fa-chtab[aria-selected="true"] { background: var(--gold-soft); border-color: var(--gold); color: var(--gold-bright); }
#fa-app .fa-chtab[aria-selected="true"] .n { background: var(--gold); border-color: var(--gold); color: #0a0a16; }
@media (max-width: 720px) {
  #fa-app .fa-chtab { padding: 6px 10px 6px 6px; gap: 6px; }
  #fa-app .fa-chtab .t { display: none; }
  #fa-app .fa-chtab svg { display: block; }
  #fa-app .fa-chtab[aria-selected="true"] .t { display: inline; }
}
#fa-app .fa-tools { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
#fa-app .fa-seg { display: inline-flex; border: 1px solid var(--border-strong); border-radius: 100px; padding: 3px; gap: 2px; background: rgba(255, 255, 255, 0.02); max-width: 100%; overflow-x: auto; scrollbar-width: none; box-sizing: border-box; }
#fa-app .fa-seg::-webkit-scrollbar { display: none; }
#fa-app .fa-seg button { appearance: none; border: 0; background: transparent; color: var(--text-1); font-size: 0.8rem; font-weight: 500; padding: 7px 12px; border-radius: 100px; cursor: pointer; min-height: 36px; white-space: nowrap; }
#fa-app .fa-seg button:hover { color: var(--text-0); }
#fa-app .fa-seg button[aria-pressed="true"] { background: var(--gold-soft); color: var(--gold-bright); }
#fa-app .fa-tool, .fa-intro .fa-tool, .fa-dialog .fa-tool { appearance: none; display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--border-strong); border-radius: 100px; background: transparent; color: var(--text-1);
  font: 500 0.8rem var(--f-body); padding: 7px 13px; min-height: 38px; cursor: pointer; transition: all var(--t-fast) var(--ease); }
#fa-app .fa-tool:hover, .fa-intro .fa-tool:hover, .fa-dialog .fa-tool:hover { border-color: var(--gold); color: var(--text-0); }
#fa-app .fa-tool svg { width: 15px; height: 15px; flex: 0 0 auto; }
#fa-app .fa-tool[aria-pressed="true"] { background: var(--gold-soft); border-color: var(--gold); color: var(--gold-bright); }
#fa-app .fa-tool:disabled { opacity: 0.45; cursor: not-allowed; }
#fa-app .fa-tool.primary { background: var(--gold); border-color: var(--gold); color: #0a0a16; font-weight: 600; }
#fa-app .fa-tool.primary:hover { background: var(--gold-bright); }
#fa-sound .fa-mute { display: none; }
#fa-app .fa-vol { width: 84px; flex: 0 0 auto; }
#fa-app .fa-vol[hidden] { display: none; }
#fa-sound[aria-pressed="false"] .fa-wave { display: none; }
#fa-sound[aria-pressed="false"] .fa-mute { display: inline; }

/* ---------------------------------------------------------------- scroll hints (the shell wraps rows that overflow)
   A faded edge and a small gold chevron in it, clear of the pills, nudging the way to swipe;
   the same look as the solar-system sim. */
#fa-app .fa-hwrap { position: relative; min-width: 0; max-width: 100%; }
#fa-app .fa-top > .fa-hwrap { flex: 0 1 auto; }
#fa-app .fa-hwrap.table { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
#fa-app .fa-hwrap.table > .fa-tablewrap { border: 0; border-radius: 0; }
#fa-app .fa-more, #fa-app .fa-less { position: absolute; top: 0; bottom: 0; width: 24px; display: flex; align-items: center; justify-content: center;
  color: var(--gold); opacity: 0; pointer-events: none; transition: opacity var(--t-med) var(--ease); z-index: 3; cursor: pointer; }
#fa-app .fa-more { right: 0; }
#fa-app .fa-less { left: 0; }
#fa-app .fa-hwrap.table > .fa-more, #fa-app .fa-hwrap.table > .fa-less { bottom: auto; height: 35px; }
#fa-app .fa-hwrap.more > .fa-more, #fa-app .fa-hwrap.less > .fa-less { opacity: 0.8; pointer-events: auto; }
#fa-app .fa-hwrap.more > .fa-more svg { animation: fa-nudge 2s ease-in-out infinite; }
#fa-app .fa-hwrap.less > .fa-less svg { animation: fa-nudge-r 2s ease-in-out infinite; }
@keyframes fa-nudge { 0%, 100% { transform: translateX(1px); } 50% { transform: translateX(-2px); } }
@keyframes fa-nudge-r { 0%, 100% { transform: translateX(-1px); } 50% { transform: translateX(2px); } }
#fa-app .fa-hwrap.more > .fa-hscroll { -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 52px), transparent calc(100% - 24px)); mask-image: linear-gradient(to right, #000 calc(100% - 52px), transparent calc(100% - 24px)); }
#fa-app .fa-hwrap.less > .fa-hscroll { -webkit-mask-image: linear-gradient(to right, transparent 24px, #000 52px); mask-image: linear-gradient(to right, transparent 24px, #000 52px); }
#fa-app .fa-hwrap.more.less > .fa-hscroll { -webkit-mask-image: linear-gradient(to right, transparent 24px, #000 52px, #000 calc(100% - 52px), transparent calc(100% - 24px)); mask-image: linear-gradient(to right, transparent 24px, #000 52px, #000 calc(100% - 52px), transparent calc(100% - 24px)); }

/* ---------------------------------------------------------------- the chapter frame */
#fa-app .fa-chead { display: flex; flex-direction: column; gap: 6px; max-width: 760px; }
#fa-app .fa-kicker { font: 500 11px var(--f-mono); letter-spacing: 0.16em; text-transform: uppercase; color: var(--fa-beam); margin: 0; }
#fa-app .fa-question { font-family: var(--f-display); font-weight: 400; font-size: clamp(1.5rem, 3.6vw, 2.1rem); line-height: 1.2; color: var(--text-0); margin: 0; }
#fa-app .fa-clead { color: var(--text-1); font-size: 0.98rem; line-height: 1.6; margin: 0; }
#fa-app .fa-clead:empty { display: none; }
#fa-app .fa-chapter { display: flex; flex-direction: column; gap: 18px; margin-top: 12px; }
#fa-app .fa-body { display: flex; flex-direction: column; gap: 18px; min-height: 280px; }
#fa-app .fa-loading { color: var(--text-2); font: 500 0.85rem var(--f-mono); padding: 40px 0; }
#fa-app .fa-cfoot { display: flex; justify-content: flex-end; border-top: 1px solid var(--border); padding-top: 16px; }
#fa-app .fa-next { appearance: none; display: inline-flex; align-items: center; gap: 10px; text-align: left; border: 1px solid var(--gold); background: var(--gold-soft); color: var(--text-0);
  border-radius: var(--radius-lg); padding: 12px 18px; cursor: pointer; font: 400 1rem var(--f-display); max-width: 520px; transition: all var(--t-fast) var(--ease); }
#fa-app .fa-next:hover { background: rgba(212, 166, 75, 0.24); }
#fa-app .fa-next small { display: block; font: 500 10.5px var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold-bright); margin-bottom: 4px; }
#fa-app .fa-next[hidden] { display: none; }

/* ---------------------------------------------------------------- building blocks */
#fa-app .fa-grid2 { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 18px; align-items: start; }
@media (max-width: 1023px) { #fa-app .fa-grid2 { grid-template-columns: minmax(0, 1fr); } }
#fa-app .fa-grid2 > * { min-width: 0; }
#fa-app .fa-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: clamp(14px, 2.2vw, 20px); display: flex; flex-direction: column; gap: 12px; min-width: 0; }
#fa-app .fa-card > h3 > span { max-width: 100%; min-width: 0; }
#fa-app .fa-card > h3 .fa-seg { flex-wrap: wrap; border-radius: 18px; }
#fa-app .fa-card > h3, #fa-app .fa-h3 { font: 500 11px var(--f-mono); letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-2); margin: 0; display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
#fa-app .fa-stage { position: relative; background: radial-gradient(120% 120% at 50% 0%, #10173a, #070a1f 75%); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
#fa-app .fa-stage canvas { display: block; width: 100%; touch-action: pan-y; }
#fa-app .fa-stage .fa-badge { position: absolute; top: 10px; right: 10px; }
#fa-app .fa-row { display: flex; gap: 8px 10px; align-items: center; flex-wrap: wrap; }
#fa-app .fa-scroll { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; max-width: 100%; padding: 2px 0; }
#fa-app .fa-scroll::-webkit-scrollbar { display: none; }
#fa-app .fa-scroll .chip { flex: 0 0 auto; white-space: nowrap; }
#fa-app .chip.mono { font-family: var(--f-mono); font-size: 0.78rem; }
#fa-app .fa-help { font-size: 0.84rem; color: var(--text-2); line-height: 1.55; margin: 0; }
#fa-app .fa-note { font-size: 0.86rem; color: var(--text-1); line-height: 1.55; background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border); border-left: 2px solid var(--fa-beam); border-radius: var(--radius); padding: 11px 14px; margin: 0; }
#fa-app .fa-note.gold { border-left-color: var(--gold); }
#fa-app .fa-note.alert { border-left-color: var(--fa-alert); }
#fa-app .fa-big { font: 600 clamp(2rem, 6vw, 2.8rem) var(--f-mono); color: var(--gold-bright); line-height: 1.05; letter-spacing: -0.01em; }
#fa-app .fa-big small { font: 400 0.95rem var(--f-body); color: var(--text-1); letter-spacing: 0; margin-left: 6px; }
#fa-app .fa-mono { font-family: var(--f-mono); }
#fa-app .fa-honest { font: 500 10.5px var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-2); margin: 0; }
#fa-app .control { gap: 6px; }
#fa-app .fa-formula { font-family: var(--f-display); font-size: 1.02rem; color: var(--text-0); background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 14px; overflow-x: auto; white-space: nowrap; }
#fa-app .fa-formula var { font-style: italic; }
#fa-app .fa-formula sub, #fa-app .fa-formula sup { font-size: 0.7em; }

/* method badges (spec): PARALLAX solid, DM-MODEL dashed, ASSOC dotted, SIMULATED striped */
.fa-badge { display: inline-flex; align-items: center; font: 600 9.5px var(--f-mono); letter-spacing: 0.1em; text-transform: uppercase; padding: 3px 7px; border-radius: 6px; white-space: nowrap; vertical-align: middle; color: var(--fa-beam); border: 1px solid var(--fa-beam-line); }
.fa-badge.px { background: var(--fa-beam-soft); border-style: solid; }
.fa-badge.dm { border-style: dashed; }
.fa-badge.as { border-style: dotted; border-width: 2px; padding: 2px 6px; }
.fa-badge.sim { color: var(--gold-bright); border-color: rgba(212, 166, 75, 0.55); background: repeating-linear-gradient(135deg, rgba(212, 166, 75, 0.16) 0 4px, transparent 4px 8px); }
.fa-badge.ill { color: var(--text-2); border-color: var(--border-strong); }
/* class chips */
#fa-app .fa-cls { display: inline-flex; align-items: center; gap: 6px; font: 500 0.74rem var(--f-body); color: var(--text-1); border: 1px solid var(--border-strong); border-radius: 100px; padding: 3px 9px 3px 7px; white-space: nowrap; }
#fa-app .fa-cls i { width: 9px; height: 9px; border-radius: 50%; flex: 0 0 auto; }

/* data grid: each row a label and a value (with its badge), then an optional note and explanation at full width */
#fa-app .fa-dl { display: block; margin: 0; }
#fa-app .fa-dl > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: 12px; row-gap: 3px; align-items: baseline; padding: 9px 0; border-bottom: 1px solid var(--border); }
#fa-app .fa-dl dt { color: var(--text-2); font-size: 0.84rem; margin: 0; }
#fa-app .fa-dl dd { margin: 0; }
#fa-app .fa-dl dd.v { font: 500 0.88rem var(--f-mono); color: var(--text-0); text-align: right; }
#fa-app .fa-dl dd.v .fa-badge { margin-left: 6px; }
#fa-app .fa-dl dd.v.gold { color: var(--gold-bright); }
#fa-app .fa-dl dd.v.muted { color: var(--text-3); font: 400 0.8rem var(--f-body); }
#fa-app .fa-dl dd.n { grid-column: 1 / -1; text-align: right; font-size: 0.75rem; color: var(--text-2); }
#fa-app .fa-dl dd.h { grid-column: 1 / -1; font-size: 0.76rem; color: var(--text-2); line-height: 1.45; }
#fa-app .fa-dl dd.h.alert { color: var(--fa-alert); }

/* the three-step clock meter */
#fa-app .fa-meter { display: flex; gap: 4px; }
#fa-app .fa-meter i { flex: 1; height: 8px; border-radius: 4px; background: rgba(255, 255, 255, 0.1); }
#fa-app .fa-meter i.on { background: var(--fa-ok); }
#fa-app .fa-meter.mid i.on { background: var(--gold); }
#fa-app .fa-meter.low i.on { background: var(--fa-alert); }

/* search */
#fa-app .fa-search { position: relative; flex: 1 1 260px; min-width: 0; }
#fa-app .fa-search input { width: 100%; appearance: none; -webkit-appearance: none; background: var(--bg-1); color: var(--text-0); border: 1px solid var(--border-strong); border-radius: 100px; font: 500 0.92rem var(--f-mono); padding: 9px 16px; min-height: 42px; }
#fa-app .fa-search input:focus { outline: none; border-color: var(--gold); }
#fa-app .fa-search input::placeholder { color: var(--text-3); font-family: var(--f-body); }
#fa-app .fa-suggest { position: absolute; left: 0; right: 0; top: calc(100% + 6px); z-index: 20; background: #0d1233; border: 1px solid var(--border-strong); border-radius: var(--radius); padding: 4px; display: flex; flex-direction: column; max-height: 300px; overflow-y: auto; box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5); }
#fa-app .fa-suggest[hidden] { display: none; }
#fa-app .fa-suggest button { appearance: none; border: 0; background: none; text-align: left; color: var(--text-1); padding: 8px 10px; border-radius: 8px; cursor: pointer; font: 500 0.86rem var(--f-mono); display: flex; justify-content: space-between; gap: 10px; }
#fa-app .fa-suggest button span { color: var(--text-2); font: 400 0.78rem var(--f-body); }
#fa-app .fa-suggest button:hover, #fa-app .fa-suggest button.on { background: var(--surface-2); color: var(--text-0); }

/* tables */
#fa-app .fa-table { width: 100%; border-collapse: collapse; font-size: 0.84rem; }
#fa-app .fa-table th { font: 500 10.5px var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-2); text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
#fa-app .fa-table td { padding: 7px 10px; border-bottom: 1px solid var(--border); color: var(--text-1); }
#fa-app .fa-table td.num, #fa-app .fa-table th.num { font-family: var(--f-mono); text-align: right; white-space: nowrap; }
#fa-app .fa-tablewrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }

/* toast, sound note */
#fa-app .fa-toast { position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); background: rgba(11, 15, 43, 0.96); border: 1px solid var(--gold); color: var(--text-0); border-radius: 100px; padding: 10px 18px; font-size: 0.88rem; z-index: 80; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45); max-width: calc(100vw - 32px); }
#fa-app .fa-toast[hidden] { display: none; }
#fa-app .fa-soundnote { position: fixed; right: 14px; bottom: calc(14px + env(safe-area-inset-bottom, 0px)); z-index: 70; margin: 0; font: 500 10.5px var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--fa-beam); background: rgba(6, 8, 28, 0.86); border: 1px solid var(--fa-beam-line); border-radius: 100px; padding: 6px 12px; pointer-events: none; }
#fa-app .fa-soundnote[hidden] { display: none; }
#fa-app .fa-credit { font-size: 0.8rem; color: var(--text-3); }

/* ---------------------------------------------------------------- dialogs */
.fa-dialog { background: var(--bg-1); color: var(--text-1); border: 1px solid var(--border-strong); border-radius: var(--radius-lg); padding: 0; width: min(680px, calc(100vw - 24px)); max-height: min(86vh, 880px); box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6); }
.fa-dialog::backdrop { background: rgba(4, 6, 20, 0.72); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); }
.fa-dialog-in { padding: 22px 24px 24px; overflow-y: auto; max-height: inherit; }
.fa-dialog header { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; }
.fa-dialog h2 { font-family: var(--f-display); font-weight: 400; font-size: 1.5rem; color: var(--text-0); margin: 0; }
.fa-dialog h3 { font: 500 11px var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold); margin: 18px 0 6px; }
.fa-dialog p, .fa-dialog li { font-size: 0.92rem; line-height: 1.6; }
.fa-dialog .fa-x { width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--border-strong); background: transparent; color: var(--text-1); cursor: pointer; font-size: 1.2rem; }
.fa-dialog .fa-x:hover { border-color: var(--gold); color: var(--gold-bright); }
.fa-dialog a { color: var(--gold-bright); }

/* ---------------------------------------------------------------- first visit */
.fa-intro { position: fixed; inset: 0; z-index: 120; background: #03040f; display: grid; place-items: center; }
.fa-intro[hidden] { display: none; }
.fa-intro canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.fa-intro-cap { position: relative; z-index: 1; max-width: 640px; margin: 0 24px; text-align: center; font-family: var(--f-display); font-size: clamp(1.25rem, 3.6vw, 1.9rem); line-height: 1.35; color: var(--text-0); opacity: 0; transition: opacity 900ms var(--ease); align-self: end; margin-bottom: 18vh; }
.fa-intro-cap.on { opacity: 1; }
.fa-intro-cap .g { display: inline-block; margin-top: 10px; color: var(--gold-bright); }
.fa-intro { transition: opacity 600ms var(--ease); }
.fa-intro.out { opacity: 0; }
.fa-intro .fa-tool { position: absolute; z-index: 2; right: 18px; bottom: calc(18px + env(safe-area-inset-bottom, 0px)); }

/* ---------------------------------------------------------------- the Instagram reel (?reel=1) */
html.fa-reel, html.fa-reel body { background: #000; height: 100%; overflow: hidden; }
html.fa-reel body > * { display: none !important; }
html.fa-reel body > .fa-reelbox { display: flex !important; }
.fa-reelbox { position: fixed; inset: 0; flex-direction: column; align-items: center; justify-content: center; gap: 10px; padding: 10px; background: #000; }
.fa-reelbox canvas { display: block; height: calc(100vh - 76px); height: calc(100dvh - 76px); width: auto; max-width: 100%; object-fit: contain; }
.fa-reel-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: center; font: 500 0.82rem var(--f-body); color: var(--text-2); }
.fa-reel-bar button, .fa-reel-bar a { appearance: none; border: 1px solid var(--border-strong); background: transparent; color: var(--text-1); border-radius: 100px; padding: 7px 14px; font: inherit; cursor: pointer; text-decoration: none; }
.fa-reel-bar button:hover, .fa-reel-bar a:hover { border-color: var(--gold); color: var(--gold-bright); }
.fa-reel-bar a { border-color: var(--gold); color: var(--gold-bright); }
.fa-reel-bar a[hidden] { display: none; }
.fa-reel-bar #rl-time { font-family: var(--f-mono); min-width: 7.5em; text-align: center; }

/* ---------------------------------------------------------------- self-test (#test) */
.fa-test { position: fixed; inset: auto 12px 12px 12px; max-height: 72vh; overflow: auto; z-index: 130; background: rgba(6, 8, 28, 0.97); border: 1px solid var(--gold); border-radius: var(--radius-lg); padding: 16px 18px; font: 12px var(--f-mono); color: var(--text-1); box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6); }
.fa-test h3 { font-size: 13px; color: var(--text-0); margin: 0 0 8px; }
.fa-test .ok { color: #7fe0a0; } .fa-test .bad { color: #ff8a7a; }
.fa-test table { border-collapse: collapse; width: 100%; }
.fa-test td { padding: 2px 8px 2px 0; vertical-align: top; }
.fa-test .fa-tool { appearance: none; border: 1px solid var(--border-strong); border-radius: 100px; background: transparent; color: var(--text-1); font: 500 0.78rem var(--f-body); padding: 5px 12px; cursor: pointer; }

/* ---------------------------------------------------------------- Chapter 1 · El Faro */
#fa-app .c1-head { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: flex-end; justify-content: space-between; }
#fa-app .c1-name { font: 600 clamp(1.6rem, 5vw, 2.3rem) var(--f-mono); color: var(--text-0); letter-spacing: -0.01em; line-height: 1.1; margin: 0; }
#fa-app .c1-bname { font: 500 0.95rem var(--f-mono); color: var(--text-2); margin: 2px 0 0; }
#fa-app .c1-why { color: var(--text-1); font-size: 0.92rem; line-height: 1.55; margin: 0; }
#fa-app .c1-hero { aspect-ratio: 1 / 1; max-height: 560px; }
#fa-app .c1-hero canvas { height: 100%; }
#fa-app .c1-strip canvas { height: 92px; }
#fa-app .c1-ppdot canvas { height: clamp(320px, 62vw, 520px); touch-action: manipulation; }
#fa-app .c1-legend { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 0.78rem; color: var(--text-2); }
#fa-app .c1-legend span { display: inline-flex; align-items: center; gap: 6px; }
#fa-app .c1-legend svg { width: 12px; height: 12px; }
#fa-app .c1-quiz { display: flex; flex-direction: column; gap: 10px; }
#fa-app .c1-quiz ol { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 6px; }
#fa-app .c1-quiz li { display: flex; align-items: center; gap: 10px; background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border); border-radius: var(--radius); padding: 8px 10px; }
#fa-app .c1-quiz li .k { font: 600 0.82rem var(--f-mono); color: var(--gold-bright); width: 22px; }
#fa-app .c1-quiz li .nm { flex: 1; font: 500 0.88rem var(--f-mono); color: var(--text-0); }
#fa-app .c1-quiz li .nm small { display: block; font: 400 0.76rem var(--f-body); color: var(--text-2); }
#fa-app .c1-quiz li button { width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--border-strong); background: transparent; color: var(--text-1); cursor: pointer; }
#fa-app .c1-quiz li button:hover { border-color: var(--gold); color: var(--gold-bright); }
#fa-app .c1-quiz li.right { border-color: rgba(127, 224, 168, 0.6); }
#fa-app .c1-quiz li.wrong { border-color: rgba(255, 122, 107, 0.6); }

/* depth: what each level shows (the shell sets fa-d-<level> on #fa-app) */
#fa-app.fa-d-explorar .d2, #fa-app.fa-d-explorar .d3, #fa-app.fa-d-entender .d3 { display: none !important; }
#fa-app .fa-card > h3 .fa-mono { color: var(--text-2); font-size: 11px; letter-spacing: 0.02em; text-transform: none; }

/* Chapter 1, continued */
#fa-app .c1-id { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
#fa-app .c1-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
#fa-app .c1-find { display: flex; gap: 8px; align-items: center; flex: 1 1 320px; max-width: 480px; min-width: 0; }
#fa-app .c1-find .fa-tool { white-space: nowrap; }
@media (max-width: 480px) { #fa-app #c1-rand-l { display: none; } #fa-app #c1-rand { padding: 7px 11px; } }
#fa-app .c1-col { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
#fa-app .c1-strobe { pointer-events: none; }
#fa-app .c1-ctl { display: flex; flex-direction: column; gap: 14px; }
#fa-app .c1-ctl:empty { display: none; }
#fa-app .c1-spin { gap: 6px; }
#fa-app .c1-count { margin: 0; color: var(--text-1); font-size: 0.84rem; }
#fa-app .c1-spin .fa-help { margin-top: 4px; }
#fa-app .c1-strip h3 .fa-row { gap: 6px; }
#fa-app .c1-rvm canvas { height: 120px; }
#fa-app .c1-rvmbox { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
#fa-app .c1-clock { display: flex; flex-direction: column; gap: 8px; padding-top: 8px; }
#fa-app .c1-clock .fa-help b { color: var(--text-1); font-weight: 600; }
#fa-app .c1-foot { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; }
#fa-app .c1-quiz li button:disabled { opacity: 0.28; cursor: default; }
#fa-app .c1-quiz li .c1-qsee { display: grid; place-items: center; }
#fa-app .c1-pp .c1-legend { gap: 6px 16px; }

/* ---------------------------------------------------------------- Chapter 2 · El Reloj */
#fa-app .c2-bridge a { color: var(--gold-bright); white-space: nowrap; }
#fa-app .c2-col { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
#fa-app .c2-res canvas { height: clamp(250px, 46vw, 380px); }
#fa-app .c2-pair { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 14px; }
@media (max-width: 640px) { #fa-app .c2-pair { grid-template-columns: minmax(0, 1fr); } }
#fa-app .c2-orb canvas { height: 230px; }
#fa-app .c2-stair canvas { height: 230px; }
#fa-app .c2-cov canvas { height: 260px; }
#fa-app .c2-legend { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 0.8rem; color: var(--text-2); align-items: center; }
#fa-app .c2-legend i { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }
#fa-app .c2-terms { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
#fa-app .c2-term { border: 1px solid var(--border); border-radius: var(--radius); padding: 8px 10px; background: rgba(255, 255, 255, 0.02); transition: border-color var(--t-fast) var(--ease); }
#fa-app .c2-term.on { border-color: rgba(159, 231, 227, 0.45); background: rgba(159, 231, 227, 0.05); }
#fa-app .c2-term.next { border-color: var(--gold); box-shadow: 0 0 0 1px rgba(212, 166, 75, 0.3); }
#fa-app .c2-term label { display: flex; align-items: center; gap: 10px; cursor: pointer; min-height: 30px; position: relative; }
#fa-app .c2-term input { position: absolute; opacity: 0; width: 1px; height: 1px; }
#fa-app .c2-term .sw { width: 34px; height: 20px; border-radius: 100px; background: var(--surface-3); border: 1px solid var(--border-strong); position: relative; flex: 0 0 auto; transition: all var(--t-fast) var(--ease); }
#fa-app .c2-term .sw::before { content: ''; position: absolute; top: 50%; left: 2px; width: 14px; height: 14px; border-radius: 50%; background: var(--text-2); transform: translateY(-50%); transition: all var(--t-fast) var(--ease); }
#fa-app .c2-term input:checked + .sw { background: rgba(159, 231, 227, 0.2); border-color: var(--fa-beam); }
#fa-app .c2-term input:checked + .sw::before { left: 16px; background: var(--fa-beam); }
#fa-app .c2-term input:focus-visible + .sw { outline: 2px solid var(--gold-bright); outline-offset: 2px; }
#fa-app .c2-term .nm { flex: 1; font-size: 0.88rem; color: var(--text-0); line-height: 1.3; }
#fa-app .c2-term .nm em { font-style: normal; font: 600 9.5px var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold-bright); border: 1px solid rgba(212, 166, 75, 0.5); border-radius: 6px; padding: 2px 6px; margin-left: 4px; white-space: nowrap; }
#fa-app .c2-term .sz { font: 500 0.8rem var(--f-mono); color: var(--fa-beam); white-space: nowrap; }
#fa-app .c2-term.on .sz { color: var(--text-3); text-decoration: line-through; }
#fa-app .c2-term .x { margin: 6px 0 0 44px; font-size: 0.78rem; color: var(--text-2); line-height: 1.45; }
#fa-app .c2-fitrow { gap: 10px 14px; }
#fa-app .c2-fitrow .fa-help { flex: 1 1 200px; margin: 0; }
#fa-app .fa-tool.pulse { animation: fa-pulse 1.6s infinite; }
@keyframes fa-pulse { 0% { box-shadow: 0 0 0 0 rgba(244, 200, 66, 0.55); } 70% { box-shadow: 0 0 0 10px rgba(244, 200, 66, 0); } 100% { box-shadow: 0 0 0 0 rgba(244, 200, 66, 0); } }
#fa-app .c2-ftable td small { display: block; color: var(--text-3); font: 400 0.72rem var(--f-mono); }
#fa-app .fa-table th.nt { text-transform: none; }
#fa-app .c2-ok { color: var(--fa-ok); }
#fa-app .c2-bad { color: var(--fa-alert); }
#fa-app .c2-covbox { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; align-items: flex-start; }
#fa-app .c2-covbox .fa-stage { width: 100%; }
#fa-app #c2-data { display: flex; flex-direction: column; gap: 14px; }
#fa-app .c2-check { display: inline-flex; align-items: center; gap: 8px; font-size: 0.86rem; color: var(--text-1); cursor: pointer; min-height: 36px; }
#fa-app .c2-check input { width: 18px; height: 18px; accent-color: var(--fa-beam); }
#fa-app .c2-wgrid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px 24px; align-items: start; }
@media (max-width: 760px) { #fa-app .c2-wgrid { grid-template-columns: minmax(0, 1fr); } }
#fa-app #c2-wctl { display: flex; flex-direction: column; gap: 14px; }
#fa-app .c2-wbig { margin: 0; }
#fa-app .c2-wsay { color: var(--text-1); font-size: 0.95rem; line-height: 1.55; margin: 6px 0 12px; }
#fa-app .c2-mplot canvas { height: clamp(190px, 34vw, 260px); }
#fa-app .c2-mopts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
@media (max-width: 520px) { #fa-app .c2-mopts { grid-template-columns: minmax(0, 1fr); } }
#fa-app .c2-mopts .fa-tool { justify-content: center; text-align: center; border-radius: var(--radius); min-height: 44px; white-space: normal; line-height: 1.3; }
#fa-app .fa-tool.right { border-color: var(--fa-ok); color: var(--fa-ok); background: rgba(127, 224, 168, 0.1); opacity: 1; }
#fa-app .fa-tool.wrong { border-color: var(--fa-alert); color: var(--fa-alert); background: rgba(255, 122, 107, 0.08); opacity: 1; }
#fa-app .c2-mscore { margin: 4px 0; }

/* ---------------------------------------------------------------- Chapter 3 · Navegar */
#fa-app .c3-levels .chip { display: inline-flex; align-items: center; gap: 6px; }
#fa-app .c3-lvl .n { font: 600 0.72rem var(--f-mono); width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--border-strong); }
#fa-app .c3-lvl.active .n { background: var(--gold); color: #0a0a16; border-color: var(--gold); }
#fa-app .c3-lvl .ok { color: var(--fa-ok); }
#fa-app .c3-lvl.done:not(.active) { border-color: rgba(127, 224, 168, 0.5); }
#fa-app .c3-goal { font-size: 0.98rem; color: var(--text-1); line-height: 1.6; margin: 0; max-width: 780px; }
#fa-app .c3-col { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
#fa-app .c3-map canvas { height: clamp(300px, 60vw, 480px); }
#fa-app .c3-zoom { display: flex; flex-direction: column; gap: 10px; }
#fa-app .c3-dials canvas { height: 150px; }
#fa-app .c3-task { gap: 12px; }
#fa-app .c3-ask { font-family: var(--f-display); font-size: 1.1rem; line-height: 1.4; color: var(--text-0); margin: 0; }
#fa-app .c3-stepper { display: flex; align-items: center; gap: 16px; }
#fa-app .c3-stepper .fa-tool { width: 48px; height: 48px; justify-content: center; font-size: 1.3rem; padding: 0; }
#fa-app .c3-stepper output { min-width: 2.2ch; text-align: center; }
#fa-app .c3-sky canvas { height: clamp(180px, 30vw, 300px); touch-action: none; }
#fa-app .c3-ell canvas { height: 200px; }
#fa-app .c3-globe canvas { height: clamp(280px, 52vw, 420px); }
#fa-app .c3-err canvas { height: 240px; }
#fa-app .c3-sxctl { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
#fa-app .c3-sxctl > div { flex: 1 1 220px; }
#fa-app .c3-sxtime { margin: 0; color: var(--text-1); font-size: 0.86rem; }
#fa-app .c3-sxleg { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 0.8rem; color: var(--text-2); }
#fa-app .c3-sxleg i { display: inline-block; width: 14px; height: 3px; margin-right: 6px; vertical-align: middle; border-radius: 2px; }
#fa-app .c3-sxcount { display: flex; flex-wrap: wrap; gap: 6px; }
#fa-app .c3-sxcount span { font: 500 0.78rem var(--f-mono); color: var(--text-1); border: 1px solid var(--c); border-radius: 100px; padding: 3px 10px; }
#fa-app .c3-sxcount b { color: var(--c); font-weight: 600; }
#fa-app .c3-bar { height: 10px; border-radius: 6px; background: rgba(255, 255, 255, 0.06); overflow: hidden; }
#fa-app .c3-bar i { display: block; height: 100%; background: var(--fa-alert); border-radius: 6px; transition: width var(--t-fast) var(--ease); }
#fa-app .c3-bar i.psr { background: var(--fa-beam); }
#fa-app #c3-farctl { gap: 16px; }

/* ---------------------------------------------------------------- Chapter 4 · El Mapa de las Pioneer */
#fa-app .c4-col { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
#fa-app .c4-map canvas { height: clamp(300px, 56vw, 470px); }
#fa-app .c4-h canvas { height: 130px; }
#fa-app .c4-tri canvas { height: clamp(260px, 46vw, 380px); }
#fa-app .c4-date canvas { height: 150px; }
#fa-app .c4-age canvas { height: 220px; }
#fa-app .c4-agegrid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; align-items: start; }
@media (max-width: 760px) { #fa-app .c4-agegrid { grid-template-columns: minmax(0, 1fr); } }
#fa-app .c4-agegrid > div:first-child { display: flex; flex-direction: column; gap: 12px; }
#fa-app .c4-pick { font-family: var(--f-display); font-size: 1.05rem; line-height: 1.45; color: var(--text-1); margin: 0; }
#fa-app .c4-bits { display: flex; flex-wrap: wrap; gap: 3px; }
#fa-app .c4-bits i { font: 600 0.8rem var(--f-mono); font-style: normal; width: 17px; height: 26px; display: grid; place-items: center; border-radius: 4px; background: rgba(255, 255, 255, 0.04); color: var(--text-3); transition: background 120ms, color 120ms; }
#fa-app .c4-bits i.on { background: rgba(244, 200, 66, 0.16); color: var(--gold-bright); }
#fa-app .c4-bits i.one.on { box-shadow: inset 0 -3px 0 var(--gold-bright); }
#fa-app .c4-sum { margin: 0; color: var(--text-0); font-size: 0.95rem; }
#fa-app .c4-P { margin: 2px 0 0; }
#fa-app .c4-P small { font: 400 0.95rem var(--f-body); margin-left: 6px; }
#fa-app .c4-cands { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; font: 500 0.8rem var(--f-mono); color: var(--text-2); }
#fa-app .c4-cands li.win { color: var(--fa-beam); }
#fa-app .c4-cands li.win::before { content: '✓ '; }
#fa-app .c4-calc { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
#fa-app .c4-map canvas:focus-visible { outline: 2px solid var(--gold-bright); outline-offset: -2px; }

/* ---------------------------------------------------------------- Chapter 5 · Dónde está el Sol */
#fa-app .c5-dl { margin: 0; display: grid; grid-template-columns: minmax(0, 1fr); }
#fa-app .c5-row { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr) minmax(0, 1.25fr); gap: 4px 14px; align-items: baseline; padding: 10px 0; border-bottom: 1px solid var(--border); }
#fa-app .c5-row dt { color: var(--text-1); font-size: 0.88rem; }
#fa-app .c5-row dd { margin: 0; }
#fa-app .c5-row dd.v { font: 500 0.92rem var(--f-mono); color: var(--gold-bright); }
#fa-app .c5-row.psr dd.v { color: var(--fa-beam); }
#fa-app .c5-how { appearance: none; border: 0; background: none; padding: 0; color: var(--text-2); font: 400 0.82rem var(--f-body); cursor: pointer; text-align: left; display: inline-flex; gap: 6px; align-items: baseline; }
#fa-app .c5-how:hover { color: var(--text-0); }
#fa-app .c5-how .ico { font: 600 0.8rem var(--f-mono); color: var(--gold); width: 12px; flex: 0 0 auto; }
#fa-app .c5-row.psr .c5-how { color: var(--fa-beam); }
#fa-app .c5-row dd.x { grid-column: 1 / -1; font-size: 0.86rem; color: var(--text-1); line-height: 1.55; background: rgba(255, 255, 255, 0.03); border-radius: var(--radius); padding: 10px 12px; margin-top: 4px; }
@media (max-width: 720px) {
  #fa-app .c5-row { grid-template-columns: minmax(0, 1fr); gap: 3px; }
  #fa-app .c5-row dt { font-size: 0.82rem; color: var(--text-2); }
}
#fa-app .c5-galst canvas { height: clamp(320px, 66vw, 620px); touch-action: pan-y; }
#fa-app .c5-galctl { display: flex; flex-wrap: wrap; gap: 10px 20px; align-items: flex-end; }
#fa-app .c5-galctl > div:first-child { flex: 1 1 260px; }
#fa-app .c5-fit canvas { height: 280px; touch-action: none; }
#fa-app .c5-fit canvas:focus-visible { outline: 2px solid var(--gold-bright); outline-offset: -2px; }
#fa-app .c5-fitout { margin: 0; font-size: 0.92rem; color: var(--text-1); line-height: 1.6; }
#fa-app .c5-fitout b { color: var(--gold-bright); font-weight: 600; }
#fa-app .c5-osc canvas { height: 170px; }
#fa-app .c5-r0 canvas { height: 130px; }
#fa-app #c5-sel { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
#fa-app #c5-sel[hidden] { display: none; }

/* ---------------------------------------------------------------- Chapter 6 · La Orquesta */
#fa-app .c6-top { gap: 10px 14px; }
#fa-app .c6-top > span { max-width: 100%; min-width: 0; }
#fa-app #c6-mode .fa-seg { flex-wrap: wrap; border-radius: 18px; }
#fa-app .c6-col { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
#fa-app .c6-sky canvas { height: clamp(190px, 30vw, 300px); }
#fa-app .c6-corr canvas { height: clamp(240px, 38vw, 330px); }
#fa-app .c6-lanes canvas { height: 330px; }
#fa-app .c6-scale { display: flex; align-items: center; gap: 8px; font-size: 0.78rem; color: var(--text-2); flex-wrap: wrap; }
#fa-app .c6-scale i { width: 90px; height: 8px; border-radius: 4px; background: linear-gradient(to right, rgb(60,190,255), rgb(120,150,200) 45%, rgb(200,150,120) 55%, rgb(255,110,60)); }
#fa-app .c6-scale .fa-mono { margin-left: auto; }
#fa-app .c6-theory { display: flex; flex-wrap: wrap; gap: 4px 14px; align-items: center; }
#fa-app .c6-panel { gap: 14px; }
#fa-app .c6-cap { font-size: 0.95rem; color: var(--text-1); line-height: 1.55; margin: 0; }
#fa-app .c6-mopts { display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; }
#fa-app .c6-mopts .fa-tool { justify-content: center; border-radius: var(--radius); min-height: 44px; }
#fa-app .c6-statustxt { color: var(--text-1); font-size: 0.92rem; line-height: 1.6; margin: 0; }
#fa-app .c6-status tr.c6-sum td { color: var(--gold-bright); border-top: 1px solid var(--border-strong); }
#fa-app .c6-sky canvas { touch-action: pan-y; }

@media (prefers-reduced-motion: reduce) {
  #fa-app * { transition: none !important; scroll-behavior: auto !important; animation: none !important; }
}