/* MATES — estetica editorial sobre PAPEL (crema/beige claro, letras oscuras).
   Sobria (Kiselev), serif para titulos, hairlines en vez de cajas, oro con
   moderacion (solo aciertos/resultados). Pensada para leer largo sin cansar la vista.
   Composicion estilo producto edtech: app-shell con regiones definidas, retícula,
   iconografia monocromatica de trazo fino, un solo sistema de botones. */
:root{
  --bg:#F3ECDA;            /* crema/beige claro (papel calido) */
  --bg-soft:#EBE3CD;       /* seccion / figura (un paso mas calido) */
  --panel:#FBF7EC;         /* tarjeta (papel elevado, casi blanco calido) */
  --panel-2:#F0E8D3;       /* hover / input */
  --line:#E0D6BD;          /* hairline (tan suave) */
  --line-strong:#CDC0A2;
  --text:#322E26;          /* texto principal: cafe muy oscuro (no negro puro) */
  --text-2:#574F3F;        /* secundario */
  --muted:#5C5446;         /* tenue (oscurecido a contraste AA >=4.5:1 sobre la crema) */
  --gold:#8F7223;          /* oro oscuro — SOLO resultados/aciertos */
  --gold-deep:#806418;     /* oro para texto/CTA — AA>=4.5 sobre crema; fallback #7A5F17 */
  --gold-soft:#B9923A;     /* oro mas claro para iconos/acentos sutiles */
  --blue:#2E5E7C;          /* azul oscuro — SOLO foco de teclado (convencion) */
  --green:#4A8338;
  --red:#A8374C;
  --serif:Georgia,"Iowan Old Style","Palatino Linotype","Times New Roman",serif;
  --sans:-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --radius:7px;
  --radius-lg:12px;
  --shadow:0 1px 2px rgba(50,40,20,.04), 0 6px 18px -10px rgba(50,40,20,.10);
  --shadow-sm:0 1px 2px rgba(50,40,20,.05);
  --maxw:1000px;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
::selection{background:#8F722333}
#app{max-width:var(--maxw);margin:0 auto;padding:0 24px 96px}

/* ====================== iconos ====================== */
/* inline-SVG monocromatico, trazo ~1.6, hereda color via currentColor */
.ico{display:inline-block;vertical-align:middle;flex:none;width:18px;height:18px;
  stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;fill:none}
.ico.fill{fill:currentColor;stroke:none}

/* ====================== app-shell / encabezado ====================== */
header.top{position:sticky;top:0;z-index:20;
  background:linear-gradient(var(--bg),var(--bg) 78%,rgba(243,236,218,0));
  border-bottom:1px solid var(--line);margin-bottom:22px}
.shell{display:flex;align-items:center;gap:20px;max-width:var(--maxw);margin:0 auto;
  padding:15px 16px 14px;min-height:62px}
/* marca: mark + wordmark */
.brand{display:flex;align-items:center;gap:10px;cursor:pointer;flex:none;text-decoration:none;color:inherit}
.brand .mark{width:30px;height:30px;flex:none;color:var(--gold)}
.brand .wm{font-family:var(--serif);font-size:23px;font-weight:600;letter-spacing:.4px;
  color:var(--text);line-height:1;white-space:nowrap}
.brand .wm .tag{color:var(--gold);font-style:italic;font-size:18px;margin-left:2px}
.brand:hover .wm{color:var(--text)}
/* zona derecha del header: meta + cuenta, alineadas y separadas */
.hbar{margin-left:auto;display:flex;align-items:center;gap:14px;min-width:0}
.hgoal{display:flex;align-items:center;gap:8px;color:var(--text-2);font-size:13px;
  padding:6px 12px;border:1px solid var(--line);border-radius:20px;background:var(--panel);
  white-space:nowrap;max-width:340px;overflow:hidden}
.hgoal .ico{width:15px;height:15px;color:var(--gold);opacity:.9}
.hgoal .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hgoal .ct{color:var(--muted);font-variant-numeric:tabular-nums;flex:none}
.hgoal .lk{flex:none;color:var(--gold-deep);cursor:pointer;border-left:1px solid var(--line);padding-left:8px}
.hgoal .lk:hover{color:var(--gold)}
.hsep{width:1px;height:22px;background:var(--line);flex:none}
/* cuenta (cloud.js #cloudbtn vive aqui) */
#cloudbtn{display:flex;align-items:center;gap:8px;font-size:13px;white-space:nowrap}
#cloudbtn .acc{display:flex;align-items:center;gap:7px;color:var(--text-2)}
#cloudbtn .acc .ico{width:15px;height:15px;color:var(--muted)}
#cloudbtn .em{max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.profile-wrap{position:relative;display:inline-flex;align-items:center}
.profile-trigger{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);
  border-radius:999px;background:var(--panel);color:var(--text-2);padding:5px 9px;font:13px var(--sans);
  cursor:pointer;max-width:190px}
.profile-trigger:hover{border-color:var(--line-strong);color:var(--text)}
.profile-trigger .ico{width:15px;height:15px;color:var(--muted)}
.profile-trigger .em{max-width:118px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.profile-menu{position:absolute;right:0;top:calc(100% + 8px);width:230px;background:var(--panel);
  border:1px solid var(--line-strong);border-radius:var(--radius-lg);box-shadow:0 14px 36px -12px rgba(40,30,12,.32);
  padding:7px;z-index:40}
.profile-menu button{display:flex;align-items:center;gap:9px;width:100%;border:0;background:transparent;
  color:var(--text-2);font:14px var(--sans);text-align:left;padding:9px 10px;border-radius:6px;cursor:pointer}
.profile-menu button:hover{background:var(--panel-2);color:var(--text)}
.profile-menu .ico{width:16px;height:16px;color:var(--gold-soft)}
.profile-menu .sep{height:1px;background:var(--line);margin:6px 4px}

/* ====================== tipografia ====================== */
h2{font-family:var(--serif);font-weight:600;font-size:27px;letter-spacing:.2px;margin:6px 0 6px}
h3{font-family:var(--serif);font-weight:600;font-size:18px;margin:20px 0 8px;color:var(--text)}
.lead{color:var(--text-2);font-size:15.5px;margin:0 0 14px;max-width:64ch}
.label{display:flex;align-items:center;gap:8px;font-size:11px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--muted);font-weight:600;margin:0 0 10px}
.label .ico{width:14px;height:14px;color:var(--gold-soft)}
.label .ct{margin-left:auto;letter-spacing:.04em;color:var(--muted);font-variant-numeric:tabular-nums}
.muted{color:var(--muted)} .gold{color:var(--gold)} .small{font-size:13px}

/* ====================== seccion (cada cosa en su lugar) ====================== */
.section{margin:0 0 26px}
.section-head{display:flex;align-items:center;gap:8px;margin:0 0 10px}
.section-head h3{margin:0}

/* ====================== tarjetas / hairlines ====================== */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:18px 20px;margin:0 0 14px;box-shadow:var(--shadow-sm)}
.card.tap{cursor:pointer;transition:border-color .18s,box-shadow .18s,transform .18s}
.card.tap:hover{border-color:var(--line-strong);box-shadow:var(--shadow);transform:translateY(-1px)}
.card.pad-tight{padding:6px 18px}
.hr{height:1px;background:var(--line);border:0;margin:22px 0}

/* ====================== retícula del dashboard ====================== */
.grid-2{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:26px;align-items:start}
.col{min-width:0}

/* ====================== metas ====================== */
.goal{display:flex;align-items:flex-start;gap:14px;padding:17px 20px;
  border:1px solid var(--line);border-left:3px solid var(--line-strong);
  border-radius:var(--radius-lg);margin:0 0 12px;cursor:pointer;background:var(--panel);
  box-shadow:var(--shadow-sm);transition:border-color .18s,box-shadow .18s,transform .18s}
.goal:hover{border-left-color:var(--gold);box-shadow:var(--shadow);transform:translateY(-1px)}
.goal .gi{flex:none;width:64px;height:48px;border-radius:10px;background:var(--bg-soft);
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  color:var(--gold);margin-top:1px;padding:3px}
.goal .gi .ico{width:18px;height:18px}
.goal .gi svg{width:100%;height:100%;display:block}
.goal .body{flex:1;min-width:0}
.goal .nm{font-family:var(--serif);font-size:18px;line-height:1.3}
.goal .ds{color:var(--muted);font-size:14px;margin-top:3px}
.goal .ct{flex:none;display:flex;align-items:center;gap:5px;color:var(--muted);font-size:12px;
  font-variant-numeric:tabular-nums;margin-top:3px;white-space:nowrap}
.goal .ct .ico{width:13px;height:13px}
/* accion "empezar" a la derecha de la meta (empujada con margin-left:auto) */
.goal .goal-go{margin-left:auto;flex:none;font-size:13px;color:var(--gold-deep);white-space:nowrap}

/* ====================== botones (un solo sistema) ====================== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--sans);
  background:var(--panel);color:var(--text-2);border:1px solid var(--line-strong);
  border-radius:var(--radius);padding:11px 17px;font-size:14px;font-weight:500;cursor:pointer;
  transition:background-color .15s,border-color .15s,color .15s,box-shadow .15s,transform .15s;line-height:1.1}
.btn:hover{border-color:var(--blue);color:var(--text)}
.btn .ico{width:16px;height:16px}
.btn.primary{background:var(--gold-deep);color:#FBF7EC;border-color:var(--gold-deep);font-weight:600;
  box-shadow:var(--shadow-sm)}
.btn.primary:hover{filter:brightness(1.07);color:#FBF7EC;border-color:var(--gold-deep)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn.ghost:hover{color:var(--text);border-color:var(--line);background:var(--panel)}
.btn.block{display:flex;width:100%}
.btn.lg{padding:14px 22px;font-size:15px} /* 14px vertical: alto >=44px (objetivo tactil) */
.btn:disabled{opacity:.4;cursor:default;box-shadow:none}
.btn:disabled:hover{border-color:var(--line-strong);color:var(--text-2);filter:none}
/* enlace de volver */
.back{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:13px;
  cursor:pointer;margin:0 0 6px;transition:color .15s}
.back .ico{width:14px;height:14px}
.back:hover{color:var(--gold-deep)}

/* ====================== opciones ====================== */
.opt{display:block;width:100%;text-align:left;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:13px 16px;margin:0 0 9px;cursor:pointer;color:var(--text);
  font-size:15px;font-family:var(--sans);transition:background-color .14s,border-color .14s,color .14s,box-shadow .14s,transform .14s}
.opt:hover{border-color:var(--line-strong);background:var(--panel-2)}
.opt.correct{border-color:var(--green);background:rgba(74,131,56,0.15);color:#3A6E2A}
.opt.wrong{border-color:var(--red);background:rgba(168,55,76,0.10)}
.opt:disabled{cursor:default}

/* ====================== entrada de respuesta ====================== */
.answer-input{display:block;width:100%;font-size:21px;background:var(--panel-2);color:var(--text);
  border:1px solid var(--line-strong);border-radius:var(--radius);padding:11px 12px;margin-top:4px;
  min-height:46px;box-sizing:border-box;font-family:var(--sans)}
.answer-input:focus{outline:none;border-color:var(--gold);background:var(--panel)}
.answer-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.answer-tools{display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin:8px 0 6px}
.ans-chip{height:28px;padding:0 9px;border:1px solid var(--line);border-radius:999px;background:var(--panel);
  color:var(--text-2);font:13px var(--sans);cursor:pointer}
.ans-chip:hover{border-color:var(--gold);color:var(--gold);background:var(--bg-soft)}

/* ====================== feedback / solucion ====================== */
.feedback{display:flex;align-items:center;gap:9px;margin:14px 0 8px;padding:11px 15px;
  border-radius:var(--radius);font-size:14px}
.feedback .ico{width:17px;height:17px;flex:none}
.feedback.ok{background:rgba(74,131,56,0.13);border:1px solid rgba(74,131,56,.45);color:#3A6E2A}
.feedback.no{background:rgba(168,55,76,0.10);border:1px solid rgba(168,55,76,.45);color:#8E2C3E}
.sol{background:var(--bg-soft);border:1px solid var(--line);border-left:3px solid var(--gold);
  padding:12px 16px;margin:12px 0;border-radius:0 var(--radius) var(--radius) 0}
.sol .label{margin-top:0}
.sol ol{margin:8px 0 0;padding-left:20px}.sol li{margin:4px 0;color:var(--text-2)}

/* ====================== guion del short ====================== */
.guion{font-family:var(--serif);white-space:pre-wrap;background:var(--bg-soft);border:1px solid var(--line);
  border-radius:var(--radius);padding:14px 18px;font-size:15px;line-height:1.7;color:var(--text-2);font-style:italic}

/* ====================== figuras / diagramas ====================== */
figure.diagram{margin:14px 0;padding:14px;background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-lg)}
figure.diagram svg{display:block;width:100%;max-width:460px;height:auto;margin:0 auto}
figure.diagram figcaption{font-family:var(--serif);font-style:italic;color:var(--muted);font-size:13px;margin-top:8px;text-align:center}

/* ====================== progreso ====================== */
.bar{height:8px;background:var(--panel-2);border-radius:5px;overflow:hidden;border:1px solid var(--line)}
.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--gold-soft),var(--gold));border-radius:5px;transition:width .4s}
.prog-grid{display:grid;grid-template-columns:1fr auto;gap:0;align-items:stretch;font-size:14px}
.prog-grid .pc{display:flex;align-items:center;gap:9px;padding:9px 0;border-top:1px solid var(--line)}
.prog-grid .pc:first-child,.prog-grid .pc:nth-child(2){border-top:0}
.prog-grid .pc .ico{width:13px;height:13px;color:var(--muted)}
.prog-grid .pc.val{justify-content:flex-end;font-variant-numeric:tabular-nums;color:var(--text-2)}
.prog-grid .pc.done{color:var(--gold)}
/* anillo/encabezado de progreso */
.prog-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.prog-top .pct{font-size:30px;font-family:var(--serif);color:var(--gold);line-height:1;font-variant-numeric:tabular-nums}
.prog-top .lab{font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);font-weight:600}
.today-card{padding:18px 20px}
.today-main{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:13px}
.today-main h3{margin:0 0 4px;font-size:20px}
.today-main .label{margin-bottom:5px}
.today-goal{display:flex;justify-content:space-between;gap:10px;color:var(--muted);
  font-size:12px;font-variant-numeric:tabular-nums;margin:0 0 7px}
.trial-card{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 18px;
  border-left:3px solid var(--gold)}
.trial-card .label{margin-bottom:4px}
.trial-card p{margin:0;color:var(--text-2);font-size:14px;line-height:1.5}
.trial-card.warn{border-left-color:var(--red)}
.daily-close{margin:14px auto 12px;max-width:420px;padding:12px 0;border-top:1px solid var(--line);
  border-bottom:1px solid var(--line)}
.daily-close p{margin:8px 0 0}

/* ====================== gamificacion (liga + XP + racha + constancia) ====================== */
.card.gamif{padding:16px 18px}
.gamif .gm-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.gamif .badge{flex:none;width:42px;height:42px;border-radius:11px;display:flex;align-items:center;
  justify-content:center;color:var(--lg,#7A756A);
  background:color-mix(in srgb, var(--lg,#7A756A) 14%, var(--panel));
  border:1px solid color-mix(in srgb, var(--lg,#7A756A) 38%, var(--line))}
.gamif .badge .ico{width:23px;height:23px}
.gamif .gm-id{flex:1;min-width:0}
.gamif .gm-id .lg{font-family:var(--serif);font-size:18px;line-height:1.15;font-weight:600}
.gamif .gm-id .xp{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;margin-top:1px}
.gamif .streak{flex:none;display:flex;align-items:center;gap:5px;color:var(--gold);
  font-family:var(--serif);font-size:17px;font-variant-numeric:tabular-nums}
.gamif .streak .ico{width:17px;height:17px;color:#C8702C}
.gamif .streak b{font-weight:600}
.gamif .streak .d{font-family:var(--sans);font-size:11px;color:var(--muted);font-weight:400;margin-left:1px}
.gamif .gm-bar{height:9px;margin:0}
.gamif .gm-sub{display:flex;justify-content:space-between;align-items:baseline;gap:8px;
  margin-top:7px;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.gamif .gm-sub .nx{color:var(--text-2)}
.gamif .gm-strip-lab{display:flex;align-items:center;gap:6px;margin:14px 0 7px;font-size:11px;
  letter-spacing:.11em;text-transform:uppercase;color:var(--muted);font-weight:600}
.gamif .gm-strip-lab .ico{width:13px;height:13px;color:var(--gold-soft)}
.gamif .gm-strip{display:flex;gap:5px;flex-wrap:nowrap}
.gamif .gm-strip .cd{flex:1 1 0;height:13px;border-radius:3px;background:var(--panel-2);
  border:1px solid var(--line)}
.gamif .gm-strip .cd.on{background:linear-gradient(160deg,var(--gold-soft),var(--gold));
  border-color:var(--gold)}
/* +XP y subida de liga en la pantalla de resultado */
.xp-gain{display:flex;align-items:center;justify-content:center;gap:7px;margin:2px 0 12px;color:var(--gold)}
.xp-gain .ico{width:22px;height:22px;color:var(--gold-soft)}
.xp-gain .amt{font-family:var(--serif);font-size:32px;font-weight:600;line-height:1;font-variant-numeric:tabular-nums}
.xp-gain .u{font-size:14px;letter-spacing:.1em;color:var(--muted);align-self:flex-end;margin-bottom:3px}
.league-up{display:flex;align-items:center;justify-content:center;gap:8px;margin:0 auto 12px;
  padding:8px 16px;max-width:max-content;border-radius:20px;background:var(--bg-soft);
  border:1px solid var(--gold);color:var(--gold);font-size:14px}
.league-up .ico{width:18px;height:18px}
.league-up b{font-family:var(--serif);font-weight:600}

/* ====================== lista de temas (frontera / repaso) ====================== */
.topic{display:flex;align-items:center;gap:13px;padding:13px 6px;border-bottom:1px solid var(--line);
  cursor:pointer;transition:background .14s;border-radius:6px}
.topic:last-child{border-bottom:0}
.topic:hover{background:var(--panel-2)}
.topic .ti{flex:none;width:30px;height:30px;border-radius:8px;background:var(--bg-soft);
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--blue)}
.topic .ti .ico{width:16px;height:16px}
.topic .ti.play{color:var(--gold)}
.topic .ti.rev{color:var(--green)}
.topic .body{flex:1;min-width:0}
.topic .nm{font-size:15px;line-height:1.3}
.topic .sub{font-size:12px;color:var(--muted);margin-top:1px}
.topic .meta{flex:none;color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}
.topic .ar{flex:none;color:var(--line-strong);display:flex;align-items:center;transition:color .14s,transform .14s}
.topic:hover .ar{color:var(--gold);transform:translateX(2px)}
.topic .ar .ico{width:16px;height:16px}

/* ====================== chips ====================== */
.chip{display:inline-flex;align-items:center;gap:4px;font-size:11px;letter-spacing:.03em;
  padding:3px 10px;border-radius:20px;border:1px solid var(--line-strong);color:var(--muted);
  margin:0 6px 6px 0;background:var(--panel)}
.chip .ico{width:11px;height:11px}
.chip.course{color:var(--blue);border-color:#BFCBD3;background:rgba(46,94,124,0.05)}
.chip.rev{color:var(--green);border-color:#B6CBA8;background:rgba(74,131,56,0.06)}
.kp{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:13px;margin:4px 0 2px}
.kp .ico{width:14px;height:14px;color:var(--gold-soft)}

/* ====================== diagnostico ====================== */
.steps{display:flex;gap:5px;justify-content:center;margin:6px 0 18px}
.steps i{width:7px;height:7px;border-radius:50%;background:var(--panel-2);border:1px solid var(--line)}
.steps i.on{background:var(--gold);border-color:var(--gold)}
.center{text-align:center}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.hintbtn{color:var(--gold-deep);cursor:pointer;font-size:13px}
.hintbtn:hover{color:var(--gold)}
.err{color:var(--red)}
code{background:var(--panel-2);border:1px solid var(--line);border-radius:4px;padding:1px 6px;font-size:13px}
/* contenedor centrado para examen y resultados */
/* Pantallas de tarea enfocada (diagnostico, practica, reporte): centradas vertical y horizontalmente
   en el viewport para que la pregunta no flote pegada al header sobre un oceano de crema vacia.
   min-height fija la altura util; si el contenido crece (feedback/solucion), la columna crece y fluye
   sin recortar. NO afecta a leccion/dashboard (usan otro contenedor). */
.exam{max-width:640px;margin:0 auto;min-height:calc(100vh - 132px);
  display:flex;flex-direction:column;justify-content:center;padding:24px 0}
.exam .qhead{margin:24px 0 4px}
.exam .bar{max-width:100%;margin:10px 0 6px}
/* fmt hint */
.fmt{display:flex;align-items:center;gap:7px;color:var(--text-2);font-size:13px;margin:0 0 8px}
.fmt .ico{width:14px;height:14px;color:var(--gold-soft)}
.fmt-sub{color:var(--muted);font-size:12px;margin:5px 0 12px}

/* ====================== pantalla de bienvenida (landing) ====================== */
.welcome{max-width:1080px;margin:34px auto 0;text-align:center} /* 1080 para el hero-grid; los bloques internos conservan sus topes (620) */
.welcome .wmark{width:60px;height:60px;color:var(--gold);margin:0 auto 18px}
.welcome h1{font-family:var(--serif);font-weight:600;font-size:40px;line-height:1.12;
  letter-spacing:.3px;margin:0 0 14px;color:var(--text)}
.welcome .sub{font-size:17px;color:var(--text-2);line-height:1.6;max-width:50ch;margin:0 auto 26px}
.welcome .cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:34px}
/* hero asimetrico: copy a la izquierda, mini-diagnostico a la derecha (desktop) */
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;
  max-width:1080px;margin:0 auto;padding:34px 16px 10px}
.hero-copy{text-align:left}
.hero-copy h1{margin-top:0}
.hero-copy .sub{margin-left:0;margin-right:0}
.hero-copy .cta{justify-content:flex-start}
.hero-copy .center{text-align:left}
.hero-demo .demo{max-width:none;margin:0}
.welcome .feats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
  text-align:left;margin:8px auto 0;max-width:600px}
.welcome .feat{display:flex;flex-direction:column;gap:7px}
.welcome .feat .fi{width:26px;height:26px;color:var(--gold)}
.welcome .feat .ft{font-family:var(--serif);font-size:15px;color:var(--text)}
.welcome .feat .fd{font-size:13px;color:var(--muted);line-height:1.5}
.manifesto{max-width:620px;margin:24px auto 34px;text-align:left;background:var(--panel);
  border:1px solid var(--line);border-left:3px solid var(--gold);border-radius:var(--radius-lg);
  padding:22px 24px;box-shadow:var(--shadow-sm);scroll-margin-top:84px}
.manifesto>.label{margin-bottom:10px}
.manifesto h2{font-size:25px;margin:0 0 10px}
.manifesto p{color:var(--text-2);font-size:15.5px;line-height:1.75;margin:10px 0}
.manifest-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:16px}
.manifest-grid span{display:flex;align-items:center;gap:8px;color:var(--text-2);font-size:14px;
  padding:10px 12px;background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius)}
.manifest-grid .ico{width:15px;height:15px;color:var(--gold)}
/* pago: precio en la pantalla de suscripcion + pildora de plan en el header */
.welcome.paywall .price{display:flex;align-items:baseline;justify-content:center;gap:8px;margin:0 0 22px}
.welcome.paywall .price .amt{font-family:var(--serif);font-size:46px;font-weight:600;color:var(--gold);line-height:1}
.welcome.paywall .price .per{font-size:15px;color:var(--muted)}
.plan-pill{font-size:11px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;
  padding:2px 8px;border-radius:999px;border:1px solid var(--line-strong);vertical-align:middle}
.plan-pill.premium{color:var(--gold);border-color:var(--gold);background:#8F72231a}
.plan-pill.trial{color:var(--gold-soft);border-color:var(--gold-soft);cursor:pointer}
.plan-pill.trial:hover{color:#FBF7EC;background:var(--gold-soft);border-color:var(--gold-soft)}

/* ====================== cuenta / leaderboard ====================== */
.modal-ov{position:fixed;inset:0;background:rgba(20,16,10,.5);display:flex;align-items:center;
  justify-content:center;z-index:9999;padding:18px}
.modal-card{position:relative;background:var(--panel);color:var(--text);max-width:560px;width:100%;
  max-height:min(92vh,720px);overflow:auto;scrollbar-width:thin;
  border:1px solid var(--line-strong);border-radius:var(--radius-lg);padding:26px;
  box-shadow:0 12px 40px -8px rgba(40,30,12,.35)}
.modal-card.narrow{max-width:390px;text-align:center}
.modal-mark{display:block;width:34px;height:34px;margin:0 auto 10px;color:var(--gold)}
.modal-title{font-family:var(--serif);font-size:24px;font-weight:600;margin:0 0 4px;text-align:center}
.modal-sub{font-size:13px;color:var(--muted);margin:0 auto 16px;text-align:center;max-width:44ch}
.field{display:block;margin:10px 0;text-align:left}
.field span{display:block;font-size:12px;color:var(--muted);margin:0 0 4px}
.field input{width:100%;box-sizing:border-box;padding:11px 13px;border:1px solid var(--line-strong);
  border-radius:var(--radius);font-size:15px;font-family:inherit;background:var(--panel-2);color:var(--text);outline:none}
.field input:focus{border-color:var(--gold);background:var(--panel)}
.field input[readonly]{color:var(--muted)}
.form-grid{display:grid;grid-template-columns:1fr 120px;gap:10px}
.settings-block{border-top:1px solid var(--line);padding-top:15px;margin-top:16px}
.settings-block h3{margin:0 0 8px;font-size:17px}
.checkline{display:flex;align-items:flex-start;gap:10px;text-align:left;color:var(--text-2);font-size:14px;margin:10px 0}
.checkline input{margin-top:4px}
.mini-label{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);
  font-weight:700;text-align:left;margin:12px 0 7px;font-family:var(--sans)}
.auth-pace{margin:4px 0 2px}
.pace-picker{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:8px 0 4px}
.pace-opt{position:relative;display:block;text-align:left;cursor:pointer}
.pace-opt input{position:absolute;opacity:0;pointer-events:none}
.pace-opt span{display:block;min-height:100%;padding:10px;border:1px solid var(--line);
  border-radius:var(--radius);background:var(--panel);transition:border-color .15s,background .15s}
.pace-opt b{display:block;font-family:var(--serif);font-size:15px;color:var(--text);line-height:1.2}
.pace-opt em{display:block;font-style:normal;font-size:12px;color:var(--gold);margin-top:4px}
.pace-opt small{display:block;font-size:12px;color:var(--muted);line-height:1.35;margin-top:5px}
.pace-opt input:checked+span{border-color:var(--gold);background:#8F722314}
.account-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.account-actions .btn{flex:1 1 150px}
.msgline{font-size:13px;min-height:18px;margin-top:8px;color:var(--muted)}
.leader-card .muted{margin:3px 0 12px}
.leader-row{display:grid;grid-template-columns:34px 1fr auto;gap:10px;align-items:center;padding:10px 0;
  border-top:1px solid var(--line);font-size:14px}
.leader-row:first-child{border-top:0}
.leader-rank{font-family:var(--serif);color:var(--gold);font-size:18px}
.leader-name{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.leader-xp{font-variant-numeric:tabular-nums;color:var(--text-2)}
.price-note{display:inline-flex;align-items:center;gap:8px;margin:0 auto 18px;padding:7px 12px;
  border:1px solid var(--line-strong);border-radius:999px;color:var(--text-2);font-size:13px;background:var(--panel)}

/* ====================== leccion en secuencia ====================== */
.lesson{margin-top:6px}
.lead-explica{font-family:var(--serif);font-size:18px;line-height:1.72;color:var(--text);margin:12px 0 2px}
.lead-explica b{color:var(--text);font-weight:700}
.lead-explica em{color:var(--blue);font-style:italic}
.intuicion{margin:6px 0 10px;padding:12px 0 12px 18px;border-left:3px solid var(--line-strong);
  color:var(--text-2);font-family:var(--serif);font-style:italic;font-size:15px;line-height:1.72}
.intuicion .t{display:flex;align-items:center;gap:7px;font-style:normal;font-family:var(--sans);
  font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);font-weight:600;margin-bottom:5px}
.intuicion .t .ico{width:14px;height:14px;color:var(--gold-soft)}
.lesson figure.diagram{margin:20px 0;padding:22px}
/* video del short, contenedor con marco */
.video-wrap{position:relative;max-width:300px;margin:18px auto;aspect-ratio:9/16;border-radius:var(--radius-lg);
  overflow:hidden;background:#000;border:1px solid var(--line-strong);box-shadow:var(--shadow)}
.video-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.steps-seq{margin:6px 0 10px}
.step{display:flex;gap:16px;align-items:flex-start;padding:17px 2px;border-top:1px solid var(--line)}
.step:first-child{border-top:0}
.step .n{flex:none;width:30px;height:30px;border-radius:50%;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:15px;
  color:var(--gold);font-variant-numeric:tabular-nums;margin-top:1px}
.step .tx{flex:1;font-size:16px;line-height:1.66;color:var(--text-2)}
.step .tx b{color:var(--text);font-weight:700}
.ejemplo{background:var(--bg-soft);border:1px solid var(--line);border-left:3px solid var(--blue);
  border-radius:0 var(--radius) var(--radius) 0;padding:16px 20px;margin:20px 0 10px}
.ejemplo .t{display:flex;align-items:center;gap:7px;font-size:11px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--blue);font-weight:600;margin-bottom:8px}
.ejemplo .t .ico{width:14px;height:14px}
.ejemplo p{margin:7px 0;font-size:15.5px;line-height:1.72;color:var(--text-2)}
.ejemplo b{color:var(--gold)}
.ejemplo ol.ej-steps{margin:8px 0 0;padding:0;list-style:none;counter-reset:ej}
.ejemplo ol.ej-steps li{counter-increment:ej;position:relative;padding:9px 0 9px 30px;
  border-top:1px solid var(--line);font-size:15.5px;line-height:1.7;color:var(--text-2)}
.ejemplo ol.ej-steps li:first-child{border-top:0}
.ejemplo ol.ej-steps li::before{content:counter(ej);position:absolute;left:0;top:8px;
  width:20px;height:20px;border:1px solid var(--blue);border-radius:50%;color:var(--blue);
  font-family:var(--serif);font-size:12px;display:flex;align-items:center;justify-content:center}
.ejemplo ol.ej-steps b{color:var(--gold)}
/* puntos de conocimiento al cierre + barra de accion */
.kp-list{display:flex;flex-wrap:wrap;gap:0;margin:20px 0 8px}
.lesson-cta{display:flex;align-items:center;gap:12px;margin:8px 0 4px;padding-top:16px;border-top:1px solid var(--line)}

/* ====================== responsive ====================== */
@media (max-width:860px){
  .grid-2{grid-template-columns:1fr;gap:0}
  .welcome .feats{grid-template-columns:1fr;gap:14px}
  .manifest-grid{grid-template-columns:1fr}
  .welcome h1{font-size:32px}
  /* hero: colapsa al orden vertical (copy centrado arriba, mini-diagnostico debajo) */
  .hero-grid{display:block;padding:34px 0 6px}
  .hero-copy{text-align:center}
  .hero-copy .sub{margin-left:auto;margin-right:auto}
  .hero-copy .cta{justify-content:center}
  .hero-copy .center{text-align:center}
  .hero-demo{margin-top:26px}
  .hero-demo .demo{max-width:620px;margin:0 auto}
}
@media (max-width:620px){
  #app{padding:0 16px 80px}
  .shell{gap:12px;flex-wrap:wrap;padding:12px 16px}
  .hbar{gap:10px;max-width:100%}
  #cloudbtn{font-size:12px}
  #cloudbtn .em{max-width:118px}
  .profile-trigger{max-width:146px}
  .profile-menu{right:auto;left:0;width:220px}
  .hgoal{max-width:200px}
  .hgoal .lk{display:none}
  .trial-card{align-items:stretch;flex-direction:column}
  .trial-card .btn{width:100%}
  .today-main{align-items:stretch;flex-direction:column}
  .today-main .btn{width:100%}
  h2{font-size:23px}
  .welcome h1{font-size:27px}
  .welcome .cta{flex-direction:column}
  .welcome .cta .btn{width:100%}
  .form-grid{grid-template-columns:1fr}
  .pace-picker{grid-template-columns:1fr}
  .modal-card{padding:22px}
}

/* ====================== accesibilidad ====================== */
/* foco de teclado visible y consistente (antes SOLO los inputs lo mostraban) */
.btn:focus-visible,.opt:focus-visible,.topic:focus-visible,.goal:focus-visible,
.profile-trigger:focus-visible,.ans-chip:focus-visible,.hintbtn:focus-visible,.back:focus-visible,
a:focus-visible,input:focus-visible,[role="button"]:focus-visible{
  outline:2px solid var(--blue);outline-offset:2px}
.topic,.goal{border-radius:8px}
/* respeta "reducir movimiento" del sistema */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* ====================== indicador de sincronizacion (cloud.js) ====================== */
/* solo aparece si el guardado en la nube falla de forma persistente (antes fallaba en silencio) */
.sync-badge{position:fixed;left:16px;bottom:16px;z-index:9998;display:flex;align-items:center;gap:8px;
  background:var(--panel);color:var(--red);border:1px solid var(--red);border-radius:999px;
  padding:8px 14px;font-size:13px;box-shadow:var(--shadow);font-family:var(--sans)}
.sync-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--red);animation:pulse 1.4s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* spinner sobrio para estados de carga */
.spin{display:inline-block;width:15px;height:15px;border:2px solid var(--line-strong);
  border-top-color:var(--gold);border-radius:50%;animation:spin .7s linear infinite;vertical-align:-2px;margin-right:8px}
@keyframes spin{to{transform:rotate(360deg)}}

/* ====================== pistas y diagnostico de error (practica) ====================== */
.hint-row{margin:10px 0 2px}
.hint-row .btn{font-size:13px;padding:7px 14px}
.hint{display:flex;gap:8px;align-items:flex-start;background:var(--bg-soft);border-left:3px solid var(--gold-soft);
  border-radius:0 8px 8px 0;padding:10px 12px;margin-top:8px;font-size:14.5px;color:var(--text-2)}
.hint svg{width:15px;height:15px;flex:none;color:var(--gold-soft);margin-top:2px}
.err-comun{display:flex;gap:8px;align-items:flex-start;background:var(--bg-soft);border-left:3px solid var(--red);
  border-radius:0 8px 8px 0;padding:10px 12px;margin:10px 0;font-size:14.5px;color:var(--text-2)}
.err-comun svg{width:15px;height:15px;flex:none;color:var(--red);margin-top:2px}

/* ====================== practica: barra segmentada + micro-XP (P0-8) ====================== */
.prac-prog{display:flex;gap:4px;max-width:340px;margin:8px auto 4px}
.prac-prog .pseg{flex:1 1 0;height:6px;border-radius:3px;background:var(--panel-2);border:1px solid var(--line)}
.prac-prog .pseg.done{background:linear-gradient(90deg,var(--gold-soft),var(--gold));border-color:var(--gold)}
.prac-prog .pseg.cur{border-color:var(--gold);background:var(--bg-soft)}
.prac-correct{display:flex;align-items:center;justify-content:center;gap:6px;color:var(--green);font-size:12px;margin:2px 0 4px}
.prac-correct .ico{width:13px;height:13px}
.xp-tick{margin-left:auto;color:var(--gold);font-weight:600;font-variant-numeric:tabular-nums;font-size:13px}

/* fin de curso: celebracion (P0-9) */
.course-done{display:flex;align-items:center;gap:12px;max-width:560px;margin:0 auto 14px;padding:14px 18px;
  background:var(--bg-soft);border:1px solid var(--gold);border-left:3px solid var(--gold);border-radius:var(--radius-lg)}
.course-done>.ico{width:26px;height:26px;color:var(--gold);flex:none}
.course-done .cd-tx{display:flex;flex-direction:column}
.course-done .cd-tx b{font-family:var(--serif);font-size:17px;color:var(--text)}
.course-done .cd-tx span{font-size:13px;color:var(--muted)}

/* escudo de racha usado (P0-7) */
.freeze-note{display:flex;align-items:flex-start;gap:7px;margin-top:8px;padding:8px 10px;font-size:12.5px;
  color:var(--text-2);background:var(--bg-soft);border-left:3px solid var(--gold-soft);border-radius:0 6px 6px 0}
.freeze-note .ico{width:14px;height:14px;color:var(--gold-soft);flex:none;margin-top:1px}

/* ====================== catalogo: rutas avanzadas colapsadas ====================== */
.adv-goals{margin-top:18px}
.adv-goals>summary{cursor:pointer;color:var(--muted);font-size:14px;padding:10px 2px;
  border-top:1px solid var(--line);list-style:none}
.adv-goals>summary::-webkit-details-marker{display:none}
.adv-goals>summary::before{content:"+";display:inline-block;width:18px;color:var(--gold);font-weight:600}
.adv-goals[open]>summary::before{content:"\2212"}
.adv-goals .section{margin-top:10px}

/* ====================== landing: ancla de precio, FAQ, fundador, manifiesto ====================== */
.price-anchor{max-width:620px;margin:26px auto;text-align:left;border:1px solid var(--line);
  border-radius:12px;background:var(--panel);padding:16px 18px}
.price-anchor .label{margin-bottom:8px}
.pa-row{display:flex;justify-content:space-between;gap:14px;padding:8px 0;border-bottom:1px solid var(--line);font-size:14.5px;color:var(--text-2)}
.pa-row:last-child{border-bottom:none}
.pa-row .pa-val{white-space:nowrap;color:var(--muted)}
.pa-row.pa-mine{color:var(--text)}
.pa-row.pa-mine .pa-val{color:var(--gold)}
.welcome .demo{max-width:620px;margin:0 auto 34px;text-align:left}
.welcome .demo .label{margin-bottom:2px}
.faq{max-width:620px;margin:0 auto;text-align:left;border-bottom:1px solid var(--line)}
.faq>summary{cursor:pointer;padding:12px 2px;font-size:15px;color:var(--text);list-style:none}
.faq>summary::-webkit-details-marker{display:none}
.faq>summary::before{content:"+";display:inline-block;width:18px;color:var(--gold);font-weight:600}
.faq[open]>summary::before{content:"\2212"}
.faq p{margin:0 0 12px 18px;font-size:14.5px;color:var(--text-2)}
/* manifiesto pull-quote: titulo y 1er parrafo siempre visibles; el resto se expande */
.manifesto-more>summary{color:var(--gold-deep);cursor:pointer;font-size:14.5px;list-style:none;margin-top:10px}
.manifesto-more>summary::-webkit-details-marker{display:none}
.manifesto-more>summary::after{content:" \203A";color:var(--gold-deep)}
.manifesto-more[open]>summary{margin-bottom:6px}

/* ====================== utilidades nuevas (compartidas con otros agentes) ====================== */
/* solo-lectores-de-pantalla: oculto visualmente, accesible al lector */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0}
/* etiqueta de campo sobria (formularios) */
.fld-label{display:block;font-size:12.5px;color:var(--muted);margin:0 0 4px;font-family:var(--sans)}
/* parrafo editorial de una sola linea que sustituye al grid de stats del welcome */
.welcome .oneline-feats{max-width:620px;margin:26px auto;text-align:center;color:var(--muted);
  font-size:15px;line-height:1.65}
/* pie de sitio */
.site-foot{max-width:620px;margin:40px auto 0;padding:18px 16px 8px;border-top:1px solid var(--line);
  text-align:center;font-size:13px;color:var(--muted)}
.site-foot a{color:var(--gold-deep)}
.site-foot p{margin:8px 0 0}
/* boton de cierre del modal (requiere .modal-card position:relative) */
.modal-x{position:absolute;top:10px;right:12px;background:none;border:0;font-size:22px;line-height:1;
  color:var(--muted);cursor:pointer;padding:6px}
.modal-x:hover{color:var(--text)}