/* Fita · Estudios (S3b). Estilos de la página de Estudios de la Fita publicada, trasladados casi tal cual.
   Cambia solo el principio: los colores y las fuentes salen de fita.css, sin fuentes externas, y el tema es el de la app. */
/* Layout: app de una columna (máx. 920px). Arriba, tu montaña: el cielo cambia con la hora y la huella de foqueo sube hacia tu próxima cumbre según tu desnivel de estudio. Debajo, pestañas fijas y la vista activa. */
:root {
  /* Nombres de la página antigua leídos de fita.css (Diseño base), como en td1.css. */
  --bg: var(--fondo); --surface: var(--superficie); --surface-2: var(--superficie-2); --ink: var(--tinta); --muted: var(--tinta-2);
  --line: var(--linea); --chip: var(--superficie-2);
  --accent: var(--primario); --accent-soft: var(--primario-suave); --on-accent: var(--on-primario); --on-band: var(--on-primario);
  --glacier: var(--acento); --glacier-soft: var(--superficie-2);
  --pine: var(--ok); --pine-soft: var(--superficie-2);
  --seal: var(--area-rosa); --seal-soft: var(--superficie-2);
  --gold: var(--aviso); --gold-soft: var(--aviso-suave);
  --violet: var(--area-nepal); --violet-soft: var(--superficie-2);
  --ok-soft: var(--superficie-2); --warn: var(--aviso); --warn-soft: var(--aviso-suave); --bad: var(--error); --bad-soft: var(--error-suave);
  /* Colores de los tonos del pinyin: se quedan los de la versión oscura de la página antigua, porque enseñan (tono 1 rojo, 2 naranja, 3 verde, 4 azul, neutro gris). */
  --t1: #FF6B6B; --t2: #FFA94D; --t3: #63D47A; --t4: #5AA9FF; --t5: #A0A7B4;
  --scrim: var(--velo);
  --shadow: var(--sombra-papel);
  --scene-dim: .9;
  --f-display: var(--font-titulo);
  --f-body: var(--font-texto);
  /* Pinyin con la letra del sistema: Atkinson (latin) no trae ǎ, ǐ, ǒ, ǔ, ǚ y se mezclarían dos letras en una palabra. */
  --f-py: -apple-system, "Helvetica Neue", Arial, sans-serif;
  --f-han: var(--font-hanzi);
  --r: 16px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { background: var(--bg); color: var(--ink); font-family: var(--f-body); font-size: 16px; line-height: 1.5; }
a { color: var(--accent); text-underline-offset: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.wrap { max-width: 920px; margin: 0 auto; padding-inline: 16px; padding-block: 14px 80px; }
h1, h2, h3 { margin: 0; text-wrap: balance; }
h2 { font: 800 1.6rem/1.02 var(--f-display); letter-spacing: .01em; text-transform: uppercase; }
h3 { font: 700 1.05rem/1.3 var(--f-body); }
p { margin: 0; }
ul, ol { margin: 0; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.label { font: 700 .74rem/1.25 var(--f-body); letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.tnum { font-variant-numeric: tabular-nums; }
.han { font-family: var(--f-han); font-weight: 700; }
.py { font-family: var(--f-py); font-weight: 700; }
.py .t1 { color: var(--t1); } .py .t2 { color: var(--t2); } .py .t3 { color: var(--t3); } .py .t4 { color: var(--t4); } .py .t5 { color: var(--t5); }

/* montaña */
.hero { border-radius: 22px; overflow: hidden; background: var(--surface); box-shadow: var(--shadow); }
.scene { position: relative; height: clamp(210px, 30vw, 270px); background: var(--chip); transition: height .25s ease; }
.scene svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; filter: brightness(var(--scene-dim)); }
.scene-text { position: absolute; left: 18px; top: 14px; max-width: 62%; display: grid; gap: 4px; color: var(--scene-ink); text-shadow: 0 1px 3px rgba(0, 0, 0, .35); }
.hello { font: 900 clamp(2.3rem, 7.4vw, 3.5rem)/.92 var(--f-display); letter-spacing: .005em; }
.hello-date { font-weight: 700; font-size: 1rem; }
.scene .pulse { transform-box: fill-box; transform-origin: center; }
.hud { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr) minmax(0, 1.25fr); }
.hud > .st { padding: 14px 18px 12px; min-width: 0; display: grid; gap: 4px; align-content: start; }
.hud > .st + .st { border-left: 1px solid var(--line); }
.big { font: 900 2.5rem/.95 var(--f-display); font-variant-numeric: tabular-nums; letter-spacing: .01em; }
.big small { font-size: .5em; font-weight: 800; color: var(--muted); margin-left: 3px; letter-spacing: .04em; }
.big2 { font: 900 1.9rem/1 var(--f-display); letter-spacing: .01em; text-wrap: balance; }
.meter { height: 8px; border-radius: 99px; background: var(--chip); overflow: hidden; margin-block: 2px; }
.meter i { display: block; height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--accent), var(--gold)); }
.week-svg { width: 100%; max-width: 236px; height: auto; display: block; }
.links { display: inline-flex; gap: 14px; margin-left: auto; font-size: .9rem; font-weight: 700; }
.hud-foot { grid-column: 1 / -1; border-top: 1px solid var(--line); padding: 10px 18px 12px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
body[data-tab]:not([data-tab="hoy"]) .hud { display: none; }
body[data-tab]:not([data-tab="hoy"]) .scene { height: clamp(130px, 18vw, 170px); }
body[data-tab]:not([data-tab="hoy"]) .peak-label { display: none; }
body[data-tab]:not([data-tab="hoy"]) .hello { font-size: clamp(1.8rem, 5.6vw, 2.6rem); }
body[data-tab]:not([data-tab="hoy"]) .scene-text { max-width: 70%; }
@media (max-width: 680px) {
  .hud { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .hud > .st.wk { grid-column: 1 / -1; border-left: 0; border-top: 1px solid var(--line); }
  .big2 { font-size: clamp(1.3rem, 6.2vw, 1.9rem); }
  .big { font-size: 2.2rem; }
}

/* pestañas */
.tabs { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; background: var(--bg); padding-block: 12px 10px; margin-top: 6px; }
.tabs::-webkit-scrollbar { display: none; }
.tabs::after { content: ""; position: sticky; right: 0; flex: 0 0 28px; background: linear-gradient(90deg, transparent, var(--bg) 70%); }
.tab { font: 800 1.08rem/1 var(--f-display); letter-spacing: .04em; text-transform: uppercase; border: 0; background: transparent; color: var(--muted); padding: 9px 14px; border-radius: 999px; cursor: pointer; white-space: nowrap; display: inline-flex; align-items: center; gap: 6px; }
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] { background: var(--ink); color: var(--bg); }
.tab .n { font: 700 .72rem/1 var(--f-body); background: var(--seal); color: var(--on-band); border-radius: 999px; padding: 3px 6px; letter-spacing: 0; }
.tab .dotn { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

/* bloques */
.panel { display: grid; gap: 16px; padding-top: 6px; }
.panel > *, .stack > *, .cols > * { min-width: 0; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 16px; align-items: start; }
.stack { display: grid; gap: 10px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 16px 18px; display: grid; gap: 12px; }
.card > * { min-width: 0; }
.empty { border: 1.5px dashed var(--line); border-radius: var(--r); padding: 14px 16px; color: var(--muted); background: var(--surface); }
.notice { border-radius: var(--r); padding: 10px 14px; background: var(--warn-soft); color: var(--warn); font-weight: 700; }
.zone-h { display: flex; gap: 10px; align-items: baseline; justify-content: space-between; flex-wrap: wrap; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.chip { display: inline-flex; align-items: center; gap: 5px; background: var(--chip); color: var(--ink); border-radius: 999px; padding: 2px 10px; font-size: .82rem; white-space: nowrap; font-variant-numeric: tabular-nums; }
.chip.accent { background: var(--accent-soft); color: var(--accent); }
.chip.ok { background: var(--ok-soft); color: var(--ok); }
.chip.warn { background: var(--warn-soft); color: var(--warn); }
.chip.bad { background: var(--bad-soft); color: var(--bad); }
.chip.seal { background: var(--seal-soft); color: var(--seal); }
.chip.ghost { background: transparent; border: 1.5px dashed var(--muted); color: var(--muted); }
.chip b { font-weight: 700; }
.btn { font: 700 .92rem/1.2 var(--f-body); border: 1.5px solid var(--accent); color: var(--accent); background: transparent; border-radius: 11px; padding: 7px 14px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; }
.btn.solid { background: var(--accent); color: var(--on-accent); }
.btn.quiet { border-color: var(--line); color: var(--muted); }
.btn.seal { border-color: var(--seal); color: var(--seal); }
.btn.seal.solid { background: var(--seal); color: var(--on-band); }
.btn.big { font-size: 1.05rem; padding: 11px 20px; border-radius: 14px; }
.btn[disabled] { opacity: .45; cursor: default; }
.icon-btn { border: 1.5px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; min-width: 36px; height: 36px; padding: 0 10px; display: inline-grid; place-items: center; cursor: pointer; font: 700 .85rem/1 var(--f-body); }
.icon-btn svg { width: 18px; height: 18px; display: block; }
.icon-btn.slow { font-size: .78rem; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.spread { display: flex; gap: 10px; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; }
.msg { font-size: .875rem; color: var(--muted); }
.msg.bad { color: var(--bad); }
.msg.ok { color: var(--ok); }
.seg-ctl { display: inline-flex; border: 1.5px solid var(--line); border-radius: 11px; overflow: hidden; flex-wrap: wrap; justify-self: start; }
.seg-ctl button { font: inherit; font-size: .9rem; border: 0; border-right: 1px solid var(--line); background: var(--surface); color: var(--ink); padding: 7px 12px; cursor: pointer; min-width: 40px; }
.seg-ctl button:last-child { border-right: 0; }
.seg-ctl button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
textarea, input[type="text"] { font: inherit; width: 100%; border: 1.5px solid var(--line); border-radius: 11px; padding: 9px 11px; background: var(--surface-2); color: var(--ink); }
textarea { min-height: 72px; resize: vertical; }
.field { display: grid; gap: 5px; }
select { font: inherit; font-size: .9rem; border: 1.5px solid var(--line); border-radius: 9px; padding: 4px 8px; background: var(--surface); color: var(--ink); max-width: 100%; }
.scroll-x { overflow-x: auto; }
table.t { border-collapse: collapse; width: 100%; font-size: .92rem; }
table.t th { text-align: left; font: 700 .72rem/1.2 var(--f-body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding: 6px 8px; border-bottom: 1.5px solid var(--ink); white-space: nowrap; }
table.t td { padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.t td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
table.week td:first-child { white-space: nowrap; font-weight: 700; }

/* dorsal sorpresa */
.bib { position: relative; background: var(--surface); border-radius: 18px; box-shadow: var(--shadow); overflow: hidden; display: grid; --band: var(--accent); }
.bib.t-dato { --band: var(--glacier); }
.bib.t-reto { --band: var(--gold); }
.bib.t-hanzi { --band: var(--seal); }
.bib.t-pregunta { --band: var(--violet); }
.pin { position: absolute; width: 13px; height: 13px; border-radius: 50%; background: var(--bg); box-shadow: inset 0 1px 2px rgba(0, 0, 0, .3); z-index: 1; }
.pin.a { left: 11px; top: 11px; } .pin.b { right: 11px; top: 11px; } .pin.c { left: 11px; bottom: 11px; } .pin.d { right: 11px; bottom: 11px; }
.bib-band { display: flex; justify-content: space-between; gap: 12px; padding: 10px 36px; background: var(--band); color: var(--on-band); font: 800 1rem/1.15 var(--f-display); letter-spacing: .09em; text-transform: uppercase; }
.bib-band span:last-child { white-space: nowrap; }
.bib-front { display: grid; justify-items: center; gap: 10px; padding: 14px 20px 26px; text-align: center; }
.bib-num { font: 900 clamp(5rem, 22vw, 8.5rem)/.85 var(--f-display); letter-spacing: .02em; font-variant-numeric: tabular-nums; }
.bib-name { font: 800 1.05rem/1 var(--f-display); letter-spacing: .3em; text-transform: uppercase; color: var(--muted); padding-left: .3em; }
.bib-body { padding: 16px 22px 6px; display: grid; gap: 12px; }
.s-title { font: 900 clamp(1.7rem, 5vw, 2.25rem)/1 var(--f-display); letter-spacing: .005em; }
.s-text { font-size: 1.06rem; max-width: 62ch; }
.s-han { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.s-han .glyph { font: 700 clamp(4.2rem, 16vw, 5.6rem)/1 var(--f-han); color: var(--ink); }
.s-han .meta { display: grid; gap: 6px; }
.s-han .py { font-size: 1.5rem; }
.s-src { font-size: .82rem; color: var(--muted); }
.choices { display: grid; gap: 8px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.choice { border: 1.5px solid var(--line); background: var(--surface-2); border-radius: 12px; padding: 10px 12px; text-align: left; font: inherit; color: var(--ink); cursor: pointer; }
.choice:hover { border-color: var(--band); }
.choice[aria-pressed="true"] { border-color: var(--band); background: var(--surface); box-shadow: inset 0 0 0 1px var(--band); }
.choice.right { border-color: var(--ok); background: var(--ok-soft); color: var(--ink); }
.choice.wrong { border-color: var(--bad); background: var(--bad-soft); color: var(--ink); }
.choice[disabled] { cursor: default; }
.answer { border-left: 4px solid var(--band); padding: 2px 0 2px 12px; }
.bib-foot { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 12px 22px 18px; border-top: 1.5px dashed var(--line); margin-top: 8px; }
.bib-foot .q { font-weight: 700; }
.mini-tones { display: flex; flex-wrap: wrap; gap: 6px; }
@keyframes unfold { from { opacity: 0; transform: perspective(900px) rotateX(-70deg); } to { opacity: 1; transform: none; } }
@keyframes wobble { 0%, 100% { transform: rotate(0); } 25% { transform: rotate(-1.4deg); } 75% { transform: rotate(1.4deg); } }

/* etapa de hoy */
.stage-head { display: flex; gap: 14px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.stage-head .who { display: grid; gap: 2px; }
.ringbox { display: flex; gap: 12px; align-items: center; }
.ring { width: 74px; height: 74px; flex: none; }
.ring .bgc { stroke: var(--chip); }
.ring .fgc { stroke: var(--accent); transition: stroke-dashoffset .5s ease; }
.ring text { fill: var(--ink); font: 900 22px var(--f-display); }
.load { display: inline-flex; gap: 6px; align-items: center; font-weight: 700; font-size: .9rem; }
.dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; flex: none; background: var(--line); }
.dot.verde { background: var(--ok); } .dot.amarillo { background: var(--warn); } .dot.rojo { background: var(--bad); }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 8px 16px; font-size: .92rem; }
.facts > div { display: grid; gap: 1px; }
.secs { display: grid; gap: 14px; }
.sec { display: grid; gap: 8px; --c: var(--ink); --cs: var(--chip); }
.sec.pau { --c: var(--glacier); --cs: var(--glacier-soft); }
.sec.fisica { --c: var(--pine); --cs: var(--pine-soft); }
.sec.chino { --c: var(--seal); --cs: var(--seal-soft); }
.sec.otros { --c: var(--violet); --cs: var(--violet-soft); }
.sec-h { display: flex; gap: 8px; align-items: center; }
.sec-h .sw { width: 10px; height: 10px; border-radius: 3px; background: var(--c); }
.sec-h h3 { font: 800 1.05rem/1 var(--f-display); letter-spacing: .08em; text-transform: uppercase; }
.item { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 12px; align-items: start; padding: 10px 12px; border-radius: 13px; background: var(--surface-2); }
.item > div { display: grid; gap: 4px; }
.check { width: 32px; height: 32px; border-radius: 10px; border: 2px solid var(--c); background: var(--surface); cursor: pointer; display: grid; place-items: center; padding: 0; color: var(--on-band); }
.check svg { width: 18px; height: 18px; }
.check[aria-pressed="true"] { background: var(--c); }
.item.done .t { text-decoration: line-through; text-decoration-thickness: 2px; color: var(--muted); }
.trigger { font-size: .86rem; color: var(--muted); font-style: italic; }
.say { border: 1.5px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; padding: 2px 10px; cursor: pointer; font: inherit; font-size: .84rem; }
@keyframes pop { 0% { transform: scale(1); } 45% { transform: scale(1.28); } 100% { transform: scale(1); } }
.check.popped { animation: pop .36s ease; }

/* chino */
.steps { display: grid; gap: 10px; padding: 0; list-style: none; counter-reset: s; }
.steps li { display: grid; grid-template-columns: 2.1em minmax(0, 1fr); gap: 10px; counter-increment: s; }
.steps li::before { content: counter(s); font: 900 1.05rem/1 var(--f-display); width: 1.95em; height: 1.95em; border-radius: 50%; display: grid; place-items: center; background: var(--seal-soft); color: var(--seal); }
.flash { display: grid; gap: 12px; justify-items: center; text-align: center; padding: 22px 16px; border-radius: var(--r); background: var(--surface-2); }
.flash .bigh { font: 700 clamp(3.4rem, 15vw, 5.6rem)/1.08 var(--f-han); color: var(--ink); }
.flash .py { font-size: 1.45rem; }
.flash .ex { display: grid; gap: 3px; justify-items: center; }
.flash .ex .han { font-size: 1.3rem; font-weight: 500; }
.audio-row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; justify-content: center; }
.tones { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.tone { border-radius: 14px; padding: 12px 6px 10px; display: grid; justify-items: center; gap: 2px; background: var(--surface-2); border: 1.5px solid var(--line); cursor: pointer; font: inherit; color: var(--ink); }
.tone:hover { border-color: currentColor; }
.tone .th { font: 700 1.9rem/1.1 var(--f-han); color: var(--ink); }
.tone .py { font-size: 1.15rem; }
.tone .es { font-size: .8rem; color: var(--muted); }
.contour { width: 44px; height: 28px; }
.contour .cg { stroke: var(--line); stroke-width: 1; fill: none; }
.contour .cl { stroke: currentColor; stroke-width: 3.5; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.tc1 { color: var(--t1); } .tc2 { color: var(--t2); } .tc3 { color: var(--t3); } .tc4 { color: var(--t4); } .tc5 { color: var(--t5); }
.game { display: grid; gap: 10px; padding: 14px; border-radius: 14px; background: var(--surface-2); }
.game .picks { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.game .pick { display: grid; justify-items: center; gap: 2px; padding: 8px 4px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface); cursor: pointer; font: inherit; color: var(--ink); }
.game .pick.right { border-color: var(--ok); background: var(--ok-soft); }
.game .pick.wrong { border-color: var(--bad); background: var(--bad-soft); }
.reg td .han { font-size: 1.25rem; }
.reg .cell-h { display: grid; gap: 6px; }
.reg .cell-h .row { flex-wrap: nowrap; gap: 4px; }
.reg .icon-btn { min-width: 32px; height: 32px; padding: 0 8px; }
.reg td.ex { min-width: 9.5em; }
@media (max-width: 420px) { .tones, .game .picks { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* trazos */
.modal { position: fixed; inset: 0; z-index: 80; display: grid; place-items: center; background: var(--scrim); padding: 16px; }
.sheet { background: var(--surface); color: var(--ink); border-radius: 22px; padding: 16px 16px 18px; width: min(100%, 380px); display: grid; gap: 12px; box-shadow: var(--shadow); max-height: calc(100% - 8px); overflow-y: auto; }
.mchars { display: flex; gap: 6px; flex-wrap: wrap; }
.mchar { font: 700 1.4rem/1 var(--f-han); width: 46px; height: 46px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface-2); color: var(--ink); cursor: pointer; }
.mchar[aria-pressed="true"] { border-color: var(--seal); background: var(--seal-soft); }
.stage { position: relative; width: 100%; max-width: 280px; aspect-ratio: 1; margin: 0 auto; background: var(--surface-2); border-radius: 14px; }
.stage .grid { position: absolute; inset: 0; width: 100%; height: 100%; }
.stage .grid line, .stage .grid rect { stroke: var(--seal); stroke-opacity: .35; fill: none; }
#hw-target { position: absolute; inset: 0; }
#hw-target svg { display: block; }

/* diagnóstico */
.blocks { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.block { display: grid; gap: 8px; align-content: start; }
.code { font: 900 1rem/1 var(--f-display); letter-spacing: .04em; background: var(--ink); color: var(--bg); border-radius: 7px; padding: 4px 8px; }
.runner { display: grid; gap: 14px; }
.progress { height: 7px; background: var(--chip); border-radius: 99px; overflow: hidden; }
.progress i { display: block; height: 100%; background: var(--accent); }
.qtext { font-size: 1.15rem; font-weight: 700; max-width: 60ch; }
.opts { display: grid; gap: 8px; }
.opt { display: flex; gap: 10px; align-items: center; border: 1.5px solid var(--line); border-radius: 12px; padding: 10px 12px; cursor: pointer; background: var(--surface); font-size: 1.02rem; text-align: left; font-family: inherit; color: var(--ink); }
.opt[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); }
.opt .k { font: 900 .95rem/1 var(--f-display); width: 1.8em; height: 1.8em; display: grid; place-items: center; border-radius: 7px; background: var(--chip); flex: none; }
.timer { font: 900 1.35rem/1 var(--f-display); font-variant-numeric: tabular-nums; }
.timer.over { color: var(--bad); }
.res { display: grid; gap: 6px; border-left: 4px solid var(--ok); padding-left: 12px; }
.res.wrong { border-left-color: var(--bad); }
.sumgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
.sum { border-top: 2px solid var(--ink); padding-top: 6px; min-width: 0; }
.sum b { display: block; font: 900 1.7rem/1.05 var(--f-display); font-variant-numeric: tabular-nums; }

/* trámites */
.tram { border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); }
.tram > summary { list-style: none; cursor: pointer; padding: 12px 16px; display: grid; gap: 6px; }
.tram > summary::-webkit-details-marker { display: none; }
.tram.ref { border-style: dashed; }
.tram.done { opacity: .6; }
.tram .body { padding: 0 16px 14px; display: grid; gap: 10px; }
.kv { display: grid; grid-template-columns: minmax(130px, 190px) minmax(0, 1fr); gap: 6px 14px; font-size: .93rem; margin: 0; }
.kv dt { font: 700 .72rem/1.3 var(--f-body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding-top: 3px; }
.kv dd { margin: 0; min-width: 0; }
@media (max-width: 560px) { .kv { grid-template-columns: minmax(0, 1fr); } .kv dd { margin-bottom: 6px; } }

/* progreso */
.course { position: relative; display: grid; gap: 6px; }
.track { position: relative; height: 34px; border-radius: 9px; background: var(--chip); overflow: hidden; }
.seg { position: absolute; top: 0; bottom: 0; display: grid; place-items: center; font: 900 .95rem/1 var(--f-display); color: var(--muted); border-right: 2px solid var(--surface); }
.seg.now { background: var(--accent); color: var(--on-accent); }
.seg.past { background: var(--accent-soft); color: var(--accent); }
.seg.after { background: transparent; font-size: .78rem; }
.marks { position: relative; height: 16px; overflow: hidden; }
.mk { position: absolute; top: 2px; width: 10px; height: 10px; margin-left: -5px; border-radius: 50%; background: var(--ink); }
.mk.ref { background: var(--surface); border: 2px dashed var(--ink); }
.mk.conf { background: var(--surface); border: 2px dotted var(--muted); }
.today-line { position: absolute; top: 0; height: 56px; width: 2px; margin-left: -1px; background: var(--accent); pointer-events: none; }
.months { position: relative; height: 16px; font-size: .72rem; color: var(--muted); overflow: hidden; }
.months span { position: absolute; padding-left: 3px; border-left: 1px solid var(--line); line-height: 1.1; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: .8rem; color: var(--muted); align-items: center; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 5px; vertical-align: -1px; background: var(--ink); }
.legend i.ref { background: transparent; border: 2px dashed var(--ink); }
.legend i.today { border-radius: 1px; width: 3px; height: 12px; background: var(--accent); }
.profile { width: 100%; height: auto; display: block; }
.profile .ax { stroke: var(--line); }
.profile .pk { stroke: var(--muted); stroke-dasharray: 3 4; }
.profile .pk.hit { stroke: var(--accent); }
.profile text { fill: var(--muted); font: 600 11px var(--f-body); }
.profile text.end { fill: var(--ink); font: 900 15px var(--f-display); }
.profile .area { fill: var(--accent-soft); }
.profile .ln { stroke: var(--accent); fill: none; stroke-width: 2.5; stroke-linejoin: round; }
.profile .ep { fill: var(--accent); stroke: var(--surface); stroke-width: 2.5; }
.peaks { display: grid; gap: 6px; padding: 0; list-style: none; }
.peaks li { display: grid; grid-template-columns: 1.7em minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 7px 10px; border-radius: 11px; }
.peaks li.hit { background: var(--accent-soft); }
.peaks li.next { border: 1.5px dashed var(--accent); }
.peaks .tri { width: 22px; height: 18px; }
.peaks .tri path { fill: var(--line); }
.peaks li.hit .tri path { fill: var(--accent); }
.map { display: grid; gap: 12px; }
.map-sub { display: grid; gap: 6px; }
.topic { display: inline-flex; gap: 6px; align-items: center; border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px 2px 6px; font-size: .88rem; background: var(--surface); }
.bars { display: grid; gap: 6px; }
.bar { display: grid; grid-template-columns: minmax(110px, 190px) minmax(0, 1fr) 2.5em; gap: 10px; align-items: center; font-size: .88rem; }
.bar .b { height: 10px; border-radius: 99px; background: var(--chip); overflow: hidden; }
.bar .b i { display: block; height: 100%; background: var(--bad); }
.bar .b i.like { background: var(--ok); }
.bar .c { font-variant-numeric: tabular-nums; text-align: right; }

/* efectos */
.fx { position: fixed; inset: 0; pointer-events: none; z-index: 60; overflow: hidden; }
.float { position: absolute; transform: translate(-50%, -50%); font: 900 1.5rem/1 var(--f-display); color: var(--accent); text-shadow: 0 1px 0 var(--surface), 0 0 8px var(--surface); white-space: nowrap; }
.flake { position: absolute; width: 7px; height: 7px; margin: -3.5px 0 0 -3.5px; border-radius: 50%; }
.toast { position: fixed; left: 50%; bottom: calc(18px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); z-index: 70; background: var(--ink); color: var(--bg); padding: 12px 16px; border-radius: 16px; box-shadow: var(--shadow); display: flex; gap: 12px; align-items: center; width: max-content; max-width: min(92vw, 480px); }
.toast svg { width: 30px; height: 26px; flex: none; }
.toast b { font: 900 1.2rem/1.05 var(--f-display); letter-spacing: .02em; display: block; }
@media (prefers-reduced-motion: no-preference) {
  .bib.anim .bib-body { transform-origin: top center; animation: unfold .6s cubic-bezier(.2, .8, .2, 1) both; }
  .bib.closed .bib-num { animation: wobble 2.8s ease-in-out 1.2s 2; }
  .float { animation: rise 1.15s ease-out forwards; }
  .flake { animation: flake .95s ease-out forwards; }
  .toast { animation: toastin .35s cubic-bezier(.2, .8, .2, 1); }
  .scene .pulse { animation: pulse 2.2s ease-out infinite; }
  .progress i, .meter i { transition: width .35s ease; }
}
@keyframes rise { 0% { opacity: 0; transform: translate(-50%, -20%) scale(.8); } 18% { opacity: 1; transform: translate(-50%, -70%) scale(1.06); } 100% { opacity: 0; transform: translate(-50%, -210%) scale(1); } }
@keyframes flake { to { transform: translate(var(--dx), var(--dy)) scale(.3); opacity: 0; } }
@keyframes toastin { from { opacity: 0; transform: translate(-50%, 14px); } to { opacity: 1; transform: translate(-50%, 0); } }
@keyframes pulse { 0% { opacity: .9; transform: scale(1); } 100% { opacity: 0; transform: scale(2.6); } }
@media (max-width: 560px) {
  table.stack-sm thead { display: none; }
  table.stack-sm, table.stack-sm tbody, table.stack-sm tr, table.stack-sm td { display: block; width: 100%; }
  table.stack-sm tr { padding: 8px 0; border-bottom: 1px solid var(--line); }
  table.stack-sm td { display: grid; grid-template-columns: 8.4em minmax(0, 1fr); gap: 8px; border: 0; padding: 2px 0; white-space: normal; }
  table.stack-sm td::before { content: attr(data-l); font: 700 .7rem/1.3 var(--f-body); letter-spacing: .07em; text-transform: uppercase; color: var(--muted); padding-top: 3px; }
  .tab { font-size: 1rem; padding: 8px 11px; }
  .seg.after { font-size: 0; }
  .bib-band { padding: 10px 32px; font-size: .9rem; }
  .bib-body { padding: 14px 18px 4px; }
  .bib-foot { padding: 12px 18px 16px; }
}

/* chino · mapa de aprendizaje (paso 2) */
.zs-pendiente { background: var(--chip); color: var(--muted); }
.zs-practicando { background: var(--glacier-soft); color: var(--glacier); }
.zs-consolidacion { background: var(--violet-soft); color: var(--violet); }
.zs-demostrado { background: var(--ok-soft); color: var(--ok); }
.zs-repaso { background: var(--warn-soft); color: var(--warn); }
.chip.zo { background: transparent; border: 1px solid var(--line); color: var(--muted); }
.zbar { display: flex; height: 8px; border-radius: 99px; overflow: hidden; background: var(--chip); min-width: 72px; width: 100%; }
.zbar i { display: block; height: 100%; }
.zbar .b-demostrado { background: var(--ok); } .zbar .b-consolidacion { background: var(--violet); } .zbar .b-practicando { background: var(--glacier); } .zbar .b-repaso { background: var(--warn); } .zbar .b-pendiente { background: var(--muted); opacity: .35; }
.zkv dd { display: grid; gap: 4px; justify-items: start; }
.zkv dd .zbar { max-width: 360px; }
.zdeb { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; width: 100%; }
.zdeb li { display: flex; gap: 6px 10px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.zdeb li.done .zdt { text-decoration: line-through; color: var(--muted); }
.zerr { white-space: nowrap; }
.zleg { display: flex; flex-wrap: wrap; gap: 6px; }
.zgroups { display: grid; gap: 8px; }
.zgrp { border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.zgrp > summary { list-style: none; cursor: pointer; padding: 10px 14px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(90px, 34%); gap: 6px 14px; align-items: center; }
.zgrp > summary::-webkit-details-marker { display: none; }
.zgrp[open] > summary { border-bottom: 1px solid var(--line); }
.zg-t { display: grid; gap: 1px; }
.zrows { display: grid; padding: 4px 8px 8px; }
.zr { width: 100%; display: grid; grid-template-columns: minmax(2.6em, max-content) minmax(0, 1fr) auto; gap: 10px 12px; align-items: center; padding: 8px 6px; border: 0; border-radius: 10px; background: transparent; color: var(--ink); text-align: left; font: inherit; cursor: pointer; }
.zr.wide { grid-template-columns: minmax(0, 1fr) auto; }
.zr:hover, .zrow.open .zr { background: var(--surface-2); }
.zr-hz { font-size: 1.3rem; line-height: 1.15; white-space: nowrap; }
.zr-sent { font-size: 1.1rem; }
.zr-tx { display: grid; gap: 1px; min-width: 0; }
.zr-ch { display: flex; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
.zdet { padding: 8px 12px 12px; display: grid; gap: 8px; border-left: 3px solid var(--seal); margin: 2px 0 8px 6px; }
.zhist { margin: 0; padding-left: 20px; display: grid; gap: 4px; font-size: .9rem; }
.zprompt { display: grid; gap: 6px; justify-items: center; text-align: center; padding: 16px 10px; border-radius: var(--r); background: var(--surface-2); }
.zbig { font: 700 clamp(3rem, 13vw, 4.6rem)/1.1 var(--f-han); }
.zsent { font: 700 clamp(1.45rem, 6vw, 2.05rem)/1.35 var(--f-han); }
.zpy .py { font-size: 1.15rem; }
.zpy.solo .py { font-size: clamp(1.8rem, 7vw, 2.4rem); }
.zopts .opt .han { font-size: 1.3rem; }
.zo-t { display: grid; gap: 2px; }
.opt.right { border-color: var(--ok); background: var(--ok-soft); }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt[disabled] { cursor: default; }
.zdiag.done { padding-block: 10px; }
/* chino · paso 3: deberes y objetivo de fechas (7 oct) */
.btn.sm { padding: 4px 10px; font-size: .85rem; border-radius: 9px; }
.zdeb li { align-items: flex-start; }
.zd-t { display: grid; gap: 2px; min-width: 0; flex: 1 1 220px; }
.zd-b { display: flex; gap: 6px; flex-wrap: wrap; }
.zwarn { color: var(--warn); font-weight: 700; }
.zdform { display: grid; gap: 10px; width: 100%; padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-2); }
.zdrow { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 8em); gap: 10px; }
.zdform input[type="date"], .zdform input[type="number"] { font: inherit; width: 100%; border: 1.5px solid var(--line); border-radius: 11px; padding: 8px 11px; background: var(--surface); color: var(--ink); min-height: 42px; }
.zdform input[type="text"] { background: var(--surface); }
.zdots { display: inline-flex; gap: 5px; align-items: center; padding-top: 4px; }
.zdots i { width: 11px; height: 11px; border-radius: 50%; border: 1.5px solid var(--seal); display: block; }
.zdots i.on { background: var(--seal); }
.zdots i.test { border-radius: 3px; }
.zfc-h { display: grid; gap: 4px; min-width: 0; }
.zans { display: grid; gap: 6px; justify-items: center; text-align: center; padding: 14px 10px; border-radius: var(--r); border: 1.5px solid var(--line); }
.zf-form { display: grid; gap: 8px; }
.zf-form input[type="text"] { font: 500 1.35rem/1.3 var(--f-han); min-height: 52px; }
.zoir .btn.big { min-width: 9em; justify-content: center; }
.zfl { display: grid; gap: 6px; }
.zflist { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.zflist li { display: grid; gap: 3px; padding: 8px 10px; border-left: 3px solid var(--bad); background: var(--surface-2); border-radius: 0 10px 10px 0; }
.zflist .han { font-size: 1.2rem; }
.zfdeb { border: 1.5px dashed var(--seal); border-radius: 12px; padding: 10px 12px; display: grid; gap: 8px; }
.zfdeb p { margin: 0; }
@media (max-width: 560px) {
  .zdrow { grid-template-columns: minmax(0, 1fr) minmax(0, 6.5em); }
  .zr { grid-template-columns: minmax(2.4em, max-content) minmax(0, 1fr); }
  .zr.wide { grid-template-columns: minmax(0, 1fr); }
  .zr-ch { grid-column: 2; justify-content: flex-start; }
  .zr.wide .zr-ch { grid-column: 1; }
  .zgrp > summary { grid-template-columns: minmax(0, 1fr); }
}