/* Everest Estudio · azul + pasteles, con modo Sepia para descanso visual */
:root {
  --fondo: #F3F7FD; --superficie: #FFFFFF; --superficie-2: #EAF1FC; --borde: #D6E2F5;
  --texto: #1B2A41; --texto-2: #51627D; --texto-3: #7C8BA3;
  --primario: #2F6FDE; --primario-2: #1F56B8; --primario-suave: #DCE8FD; --sobre-primario: #FFFFFF;
  --menta: #CDEFE0; --menta-f: #1F8A5B; --lavanda: #E3DCFA; --lavanda-f: #6A4FC2;
  --durazno: #FFE1D2; --durazno-f: #C2562A; --cielo: #D7ECFF; --mantequilla: #FFF2C6; --mantequilla-f: #94700A;
  --rosa: #FCDDE6; --rosa-f: #C23A62;
  --ok: #1F9D61; --ok-suave: #DDF5E9; --error: #D9455F; --error-suave: #FDE3E8;
  --fuego: #F28C28; --corazon: #E5476A; --oro: #E3A920; --plata: #9AA8BC; --bronce: #C07A45;
  --sombra: 0 1px 2px rgba(23, 46, 89, .06), 0 6px 18px rgba(23, 46, 89, .07);
  --radio: 18px; --radio-s: 12px;
  --fuente: "Nunito", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
:root[data-tema="oscuro"] {
  --fondo: #0F1726; --superficie: #172235; --superficie-2: #1E2C44; --borde: #2A3B59;
  --texto: #E8EEF8; --texto-2: #AFC0DA; --texto-3: #8496B3;
  --primario: #6EA0FF; --primario-2: #8DB5FF; --primario-suave: #1E3460; --sobre-primario: #0B1424;
  --menta: #173B2F; --menta-f: #7FD8AE; --lavanda: #2B2550; --lavanda-f: #BCA9FF;
  --durazno: #43281C; --durazno-f: #FFB592; --cielo: #18324F; --mantequilla: #3A3216; --mantequilla-f: #F2D27A;
  --rosa: #431F2C; --rosa-f: #FF9DB8;
  --ok: #4CC98A; --ok-suave: #143628; --error: #FF7A90; --error-suave: #3F1A24;
  --sombra: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 18px rgba(0, 0, 0, .25);
  color-scheme: dark;
}
/* Sepia: papel cálido, contraste suave, sin azules saturados */
:root[data-tema="sepia"] {
  --fondo: #F1E7D0; --superficie: #FAF3E2; --superficie-2: #EDE0C4; --borde: #DCCBA6;
  --texto: #3E2F1C; --texto-2: #6B5638; --texto-3: #8C7653;
  --primario: #2F5E8E; --primario-2: #244B73; --primario-suave: #E2DCC8; --sobre-primario: #FFF9EC;
  --menta: #E0E6C8; --menta-f: #4F6B2A; --lavanda: #E8DCCB; --lavanda-f: #6E4F7A;
  --durazno: #F1D9BD; --durazno-f: #9A5424; --cielo: #E4DDC6; --mantequilla: #F3E2B0; --mantequilla-f: #7C5E10;
  --rosa: #EED6C9; --rosa-f: #9C4157;
  --ok: #4F7A2E; --ok-suave: #E3E7C4; --error: #A8433A; --error-suave: #F1D5C8;
  --sombra: 0 1px 2px rgba(80, 60, 20, .08), 0 6px 18px rgba(80, 60, 20, .08);
  color-scheme: light;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--fondo); color: var(--texto); font-family: var(--fuente); font-size: 16px; line-height: 1.5; -webkit-font-smoothing: antialiased; transition: background .3s, color .3s; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--primario); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .4em; }
h1 { font-size: 1.6rem; font-weight: 900; } h2 { font-size: 1.25rem; font-weight: 800; } h3 { font-size: 1.05rem; font-weight: 800; }
p { margin: 0 0 .6em; }
.oculto { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
:focus-visible { outline: 3px solid var(--primario); outline-offset: 2px; border-radius: 8px; }

/* ---------- estructura ---------- */
#app { min-height: 100vh; display: flex; flex-direction: column; }
.barra { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--fondo) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--borde); }
.barra-in { max-width: 980px; margin: 0 auto; display: flex; align-items: center; gap: 8px; padding: 8px 16px; min-height: 56px; }
.marca { display: flex; align-items: center; gap: 8px; font-weight: 900; font-size: 1.05rem; text-decoration: none; color: var(--texto); margin-right: auto; }
.marca svg { width: 30px; height: 30px; }
.chip-stat { display: inline-flex; align-items: center; gap: 4px; font-weight: 800; font-size: .95rem; padding: 6px 10px; border-radius: 999px; background: var(--superficie); border: 1px solid var(--borde); min-height: 36px; }
.chip-stat svg { width: 18px; height: 18px; }
.chip-stat.apagado { opacity: .55; filter: grayscale(1); }
.btn-sepia { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--borde); background: var(--superficie); border-radius: 999px; padding: 6px 12px; font-weight: 800; font-size: .9rem; cursor: pointer; min-height: 36px; }
.btn-sepia[aria-pressed="true"] { background: #E9D9B4; color: #4A3820; border-color: #CDB383; }
.principal { flex: 1; width: 100%; max-width: 980px; margin: 0 auto; padding: 16px 16px 96px; }
.nav-inf { position: fixed; bottom: 0; left: 0; right: 0; z-index: 30; background: var(--superficie); border-top: 1px solid var(--borde); padding-bottom: env(safe-area-inset-bottom); }
.nav-inf-in { max-width: 640px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); }
.nav-inf a { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 4px 10px; font-size: .74rem; font-weight: 800; color: var(--texto-3); text-decoration: none; min-height: 56px; }
.nav-inf a svg { width: 24px; height: 24px; }
.nav-inf a[aria-current="page"] { color: var(--primario); }
@media (max-width: 520px) { .marca span { display: none; } .chip-stat { padding: 5px 8px; font-size: .88rem; } .btn-sepia .txt { display: none; } }

/* ---------- piezas ---------- */
.tarjeta { background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: 16px; box-shadow: var(--sombra); }
.pila { display: flex; flex-direction: column; gap: 12px; }
.fila { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.rejilla { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 270px), 1fr)); gap: 12px; }
.rejilla-modos { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(46%, 170px), 1fr)); gap: 10px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 14px; padding: 12px 18px; font-weight: 800; cursor: pointer; min-height: 46px; text-decoration: none; transition: transform .08s, background .2s, opacity .2s; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-p { background: var(--primario); color: var(--sobre-primario); box-shadow: 0 3px 0 var(--primario-2); }
.btn-g { background: var(--superficie-2); color: var(--texto); border: 1px solid var(--borde); }
.btn-peligro { background: transparent; color: var(--error); border: 1px solid color-mix(in srgb, var(--error) 45%, transparent); }
.btn-ok { background: var(--ok); color: #fff; box-shadow: 0 3px 0 color-mix(in srgb, var(--ok) 70%, #000); }
.btn-error { background: var(--error); color: #fff; }
.btn-ancho { width: 100%; }
.btn svg { width: 20px; height: 20px; flex: none; }
.btn-chico { padding: 8px 12px; min-height: 38px; font-size: .9rem; border-radius: 11px; }
.btn-icono { width: 44px; height: 44px; padding: 0; border-radius: 12px; }
.campo { display: flex; flex-direction: column; gap: 6px; font-weight: 700; font-size: .92rem; }
.campo input, .campo select, .campo textarea, .entrada { background: var(--superficie-2); border: 1.5px solid var(--borde); border-radius: 12px; padding: 12px 14px; min-height: 46px; font-weight: 600; }
.campo input:focus, .campo select:focus, .campo textarea:focus, .entrada:focus { outline: none; border-color: var(--primario); background: var(--superficie); }
.ayuda { color: var(--texto-3); font-size: .86rem; font-weight: 600; }
.etiqueta { display: inline-flex; align-items: center; gap: 4px; font-size: .76rem; font-weight: 800; padding: 3px 9px; border-radius: 999px; background: var(--superficie-2); color: var(--texto-2); }
.e-menta { background: var(--menta); color: var(--menta-f); } .e-lavanda { background: var(--lavanda); color: var(--lavanda-f); }
.e-durazno { background: var(--durazno); color: var(--durazno-f); } .e-mantequilla { background: var(--mantequilla); color: var(--mantequilla-f); }
.e-rosa { background: var(--rosa); color: var(--rosa-f); } .e-cielo { background: var(--cielo); color: var(--primario-2); }
.barra-prog { height: 12px; background: var(--superficie-2); border-radius: 999px; overflow: hidden; }
.barra-prog > i { display: block; height: 100%; background: linear-gradient(90deg, var(--primario), color-mix(in srgb, var(--primario) 60%, #8fd3ff)); border-radius: 999px; transition: width .4s; }
.vacio { text-align: center; padding: 26px 16px; color: var(--texto-2); }
.aviso { border-radius: 14px; padding: 12px 14px; font-weight: 700; display: flex; gap: 10px; align-items: flex-start; }
.aviso-info { background: var(--cielo); } .aviso-ok { background: var(--ok-suave); color: var(--ok); } .aviso-error { background: var(--error-suave); color: var(--error); }
.aviso-mantequilla { background: var(--mantequilla); color: var(--mantequilla-f); }
.segmentado { display: inline-flex; background: var(--superficie-2); border: 1px solid var(--borde); border-radius: 12px; padding: 3px; gap: 3px; flex-wrap: wrap; }
.segmentado button { border: 0; background: transparent; padding: 8px 12px; border-radius: 9px; font-weight: 800; cursor: pointer; min-height: 38px; }
.segmentado button[aria-pressed="true"] { background: var(--superficie); box-shadow: var(--sombra); color: var(--primario); }

/* ---------- inicio ---------- */
.saludo { display: grid; grid-template-columns: auto 1fr; gap: 14px; align-items: center; }
.saludo .avatar { width: 108px; height: 108px; }
.burbuja { position: relative; background: var(--superficie); border: 1px solid var(--borde); border-radius: 16px; padding: 12px 14px; font-weight: 700; box-shadow: var(--sombra); }
.burbuja::before { content: ""; position: absolute; left: -8px; top: 22px; width: 14px; height: 14px; background: inherit; border-left: 1px solid var(--borde); border-bottom: 1px solid var(--borde); transform: rotate(45deg); }
.meta-anillo { width: 74px; height: 74px; }
.materia-card { position: relative; overflow: hidden; cursor: pointer; text-align: left; border: 1px solid var(--borde); background: var(--superficie); border-radius: var(--radio); padding: 16px 16px 14px 20px; box-shadow: var(--sombra); display: flex; flex-direction: column; gap: 8px; width: 100%; }
.materia-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 7px; background: var(--color, var(--primario)); }
.materia-card:hover { border-color: var(--primario); }
.coronas { display: inline-flex; gap: 3px; } .coronas svg { width: 18px; height: 18px; }
.semana { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; align-items: end; height: 84px; }
.semana div { display: flex; flex-direction: column; align-items: center; gap: 4px; font-size: .72rem; font-weight: 800; color: var(--texto-3); height: 100%; justify-content: flex-end; }
.semana b { display: block; width: 100%; max-width: 30px; background: var(--primario-suave); border-radius: 8px 8px 4px 4px; min-height: 4px; }
.semana .hoy b { background: var(--primario); }

/* ---------- modos ---------- */
.modo { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; text-align: left; border: 1px solid var(--borde); border-radius: 16px; padding: 14px; background: var(--superficie); cursor: pointer; min-height: 104px; box-shadow: var(--sombra); }
.modo:hover { border-color: var(--primario); }
.modo .ico { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; }
.modo .ico svg { width: 24px; height: 24px; }
.modo b { font-weight: 900; } .modo small { color: var(--texto-3); font-weight: 700; line-height: 1.3; }
.modo:disabled { opacity: .5; cursor: not-allowed; }

/* ---------- sesión de estudio ---------- */
.sesion { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; min-height: calc(100vh - 170px); }
.sesion-top { display: flex; align-items: center; gap: 12px; }
.sesion-top .barra-prog { flex: 1; }
.enunciado { font-size: 1.22rem; font-weight: 800; }
.tipo-ej { font-size: .8rem; font-weight: 900; text-transform: uppercase; letter-spacing: .06em; color: var(--texto-3); }
.opciones { display: flex; flex-direction: column; gap: 10px; }
.opcion { text-align: left; border: 2px solid var(--borde); border-bottom-width: 4px; background: var(--superficie); border-radius: 14px; padding: 13px 14px; font-weight: 700; cursor: pointer; min-height: 52px; display: flex; gap: 12px; align-items: center; }
.opcion .letra { flex: none; width: 28px; height: 28px; border-radius: 8px; border: 2px solid var(--borde); display: grid; place-items: center; font-size: .8rem; font-weight: 900; color: var(--texto-3); }
.opcion:hover { border-color: color-mix(in srgb, var(--primario) 50%, var(--borde)); }
.opcion[aria-pressed="true"] { border-color: var(--primario); background: var(--primario-suave); }
.opcion.correcta { border-color: var(--ok); background: var(--ok-suave); }
.opcion.incorrecta { border-color: var(--error); background: var(--error-suave); }
.opcion:disabled { cursor: default; }
.pie-sesion { position: sticky; bottom: 0; margin: 0 -16px -96px; padding: 14px 16px calc(16px + env(safe-area-inset-bottom)); background: var(--fondo); border-top: 1px solid var(--borde); }
.pie-sesion.ok { background: var(--ok-suave); border-color: transparent; }
.pie-sesion.mal { background: var(--error-suave); border-color: transparent; }
.pie-in { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.retro { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: start; }
.retro .avatar { width: 64px; height: 64px; }
.retro h3 { margin: 0; } .pie-sesion.ok h3 { color: var(--ok); } .pie-sesion.mal h3 { color: var(--error); }
.cita { border-left: 4px solid var(--primario); background: var(--superficie); border-radius: 0 12px 12px 0; padding: 10px 12px; font-size: .93rem; font-weight: 600; color: var(--texto-2); }
.cita small { display: block; font-weight: 800; color: var(--texto-3); margin-top: 4px; }

/* flashcard */
.flash { perspective: 1200px; min-height: 260px; cursor: pointer; }
.flash-in { position: relative; width: 100%; min-height: 260px; transition: transform .5s; transform-style: preserve-3d; }
.flash.volteada .flash-in { transform: rotateY(180deg); }
.cara { position: absolute; inset: 0; backface-visibility: hidden; border-radius: 22px; padding: 22px; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; gap: 10px; border: 2px solid var(--borde); background: var(--superficie); box-shadow: var(--sombra); font-size: 1.2rem; font-weight: 800; overflow: auto; }
.cara.atras { transform: rotateY(180deg); background: var(--cielo); font-size: 1.08rem; font-weight: 700; }
.cara small { font-size: .78rem; color: var(--texto-3); font-weight: 900; text-transform: uppercase; letter-spacing: .06em; }
.califica { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }

/* emparejar */
.parejas { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.pieza { border: 2px solid var(--borde); border-bottom-width: 4px; background: var(--superficie); border-radius: 14px; padding: 12px; font-weight: 700; cursor: pointer; min-height: 60px; text-align: center; font-size: .95rem; line-height: 1.3; }
.pieza[aria-pressed="true"] { border-color: var(--primario); background: var(--primario-suave); }
.pieza.hecha { opacity: .35; border-color: var(--ok); background: var(--ok-suave); cursor: default; }
.pieza.sacude { animation: sacude .35s; border-color: var(--error); }
@keyframes sacude { 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }

/* tutor */
.chat { display: flex; flex-direction: column; gap: 12px; }
.msj { max-width: 88%; border-radius: 16px; padding: 12px 14px; font-weight: 600; white-space: pre-wrap; }
.msj.yo { align-self: flex-end; background: var(--primario); color: var(--sobre-primario); border-bottom-right-radius: 4px; }
.msj.el { align-self: flex-start; background: var(--superficie); border: 1px solid var(--borde); border-bottom-left-radius: 4px; }
.msj.fuera { background: var(--mantequilla); color: var(--mantequilla-f); border-color: transparent; }
.msj .fuentes { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; white-space: normal; }
.fuente-btn { border: 1px solid var(--borde); background: var(--superficie-2); border-radius: 999px; padding: 4px 10px; font-size: .78rem; font-weight: 800; cursor: pointer; }
.chat-entrada { position: sticky; bottom: 64px; display: flex; gap: 8px; background: var(--fondo); padding: 10px 0; }
.chat-entrada textarea { flex: 1; resize: none; min-height: 48px; max-height: 140px; }

/* subir */
.zona { border: 2.5px dashed var(--borde); border-radius: 20px; padding: 28px 16px; text-align: center; background: var(--superficie); cursor: pointer; transition: border-color .2s, background .2s; }
.zona.encima { border-color: var(--primario); background: var(--primario-suave); }
.cola-item { display: grid; grid-template-columns: 1fr auto; gap: 6px 10px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--borde); }
.cola-item:last-child { border-bottom: 0; }

/* avatar editor */
.editor-av { display: grid; grid-template-columns: minmax(0, 240px) 1fr; gap: 18px; align-items: start; }
.editor-av .avatar { width: 100%; max-width: 240px; aspect-ratio: 1; }
@media (max-width: 640px) { .editor-av { grid-template-columns: 1fr; } .editor-av .avatar { max-width: 180px; margin: 0 auto; } }
.opc-grupo { display: flex; flex-wrap: wrap; gap: 8px; }
.opc { border: 2px solid var(--borde); background: var(--superficie); border-radius: 12px; padding: 8px 12px; font-weight: 800; cursor: pointer; min-height: 42px; }
.opc[aria-pressed="true"] { border-color: var(--primario); background: var(--primario-suave); color: var(--primario-2); }
.muestra { width: 42px; height: 42px; border-radius: 50%; border: 3px solid var(--superficie); box-shadow: 0 0 0 2px var(--borde); cursor: pointer; }
.muestra[aria-pressed="true"] { box-shadow: 0 0 0 3px var(--primario); }

/* reproductor */
.reproductor { position: fixed; left: 50%; transform: translateX(-50%); bottom: 72px; z-index: 40; width: min(560px, calc(100% - 24px)); background: var(--superficie); border: 1px solid var(--borde); border-radius: 18px; box-shadow: 0 10px 30px rgba(0,0,0,.18); padding: 12px 14px; }
.reproductor .ahora { font-weight: 800; font-size: .95rem; max-height: 4.5em; overflow: auto; }

/* modal */
.velo { position: fixed; inset: 0; z-index: 60; background: rgba(15, 23, 38, .45); display: grid; place-items: center; padding: 16px; }
.modal { width: min(520px, 100%); max-height: calc(100vh - 32px); overflow: auto; background: var(--superficie); border-radius: 22px; padding: 20px; box-shadow: 0 20px 50px rgba(0,0,0,.3); }
.toast { position: fixed; top: 70px; left: 50%; transform: translateX(-50%); z-index: 70; background: var(--texto); color: var(--fondo); padding: 10px 16px; border-radius: 12px; font-weight: 800; box-shadow: var(--sombra); max-width: calc(100% - 32px); }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; align-content: center; gap: 4px; padding: 16px; background: radial-gradient(1200px 600px at 10% -10%, var(--primario-suave), transparent), radial-gradient(900px 500px at 110% 110%, var(--lavanda), transparent), var(--fondo); }
.login .tarjeta { width: min(440px, 100%); padding: 26px 22px; }
.promesas { display: grid; gap: 8px; margin: 14px 0 4px; }
.promesas div { display: flex; gap: 10px; align-items: center; font-weight: 700; color: var(--texto-2); font-size: .93rem; }
.promesas i { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; font-style: normal; flex: none; }

/* admin */
.tabla { width: 100%; border-collapse: collapse; font-size: .9rem; }
.tabla th, .tabla td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--borde); vertical-align: top; }
.tabla th { font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--texto-3); }
.tabla-env { overflow-x: auto; }

.celebra { animation: rebote .6s; } @keyframes rebote { 0% { transform: scale(.9); } 50% { transform: scale(1.06); } 100% { transform: scale(1); } }
.avatar .boca, .avatar .cejas { transition: all .25s; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

/* ======================= v2: lo heredado de Las 5 Cumbres ======================= */
/* navegación de 6 pestañas */
.nav-inf-in { max-width: 720px; grid-template-columns: repeat(6, 1fr); }
.nav-inf a { font-size: .7rem; padding: 8px 2px 10px; }
.nav-inf a span { white-space: nowrap; }
@media (max-width: 360px) { .nav-inf a { font-size: .62rem; } .nav-inf a svg { width: 22px; height: 22px; } }
@media (max-width: 520px) { .sm-oculto { display: none !important; } }
.banda-plan { background: var(--mantequilla); color: var(--mantequilla-f); font-weight: 800; text-align: center; padding: 8px 16px; font-size: .9rem; }
.banda-plan a { color: inherit; }
.enlace-tarjeta { text-decoration: none; color: inherit; gap: 12px; flex-wrap: nowrap; }
.enlace-tarjeta:hover { border-color: var(--primario); }
.ico-redondo { flex: none; width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center; }
.ico-redondo svg { width: 24px; height: 24px; }

/* sendero */
.sd-leyenda { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 200px), 1fr)); gap: 8px; }
.sd-leyenda span { border-radius: 12px; padding: 8px 12px; font-size: .85rem; font-weight: 700; }
.sd-leyenda b { display: block; }
.sd-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr)); gap: 12px; }
.sd-card { display: grid; grid-template-columns: 104px 1fr; gap: 14px; align-items: start; border-left: 6px solid var(--color, var(--primario)); }
.sd-montana { width: 104px; height: 130px; overflow: visible; }
@media (max-width: 400px) { .sd-card { grid-template-columns: 1fr; } .sd-montana { margin: 0 auto; } }
.sd-refs summary { cursor: pointer; font-weight: 800; font-size: .88rem; color: var(--rosa-f); }
.sd-refs ul { margin: 6px 0 0; padding-left: 18px; font-size: .88rem; }
.sd-inicio { display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; text-decoration: none; color: inherit; }
.sd-inicio:hover { border-color: var(--primario); }
.sd-pasos { display: flex; align-items: center; }
.sd-pasos span { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; font-weight: 900; font-size: .85rem; background: var(--superficie-2); color: var(--texto-3); border: 2px solid var(--borde); }
.sd-pasos span.actual { background: var(--primario); color: var(--sobre-primario); border-color: var(--primario); }
.sd-pasos span.hecho { background: var(--ok); color: #fff; border-color: var(--ok); }
.sd-pasos i { width: 10px; height: 3px; background: var(--borde); }
@media (max-width: 460px) { .sd-inicio { grid-template-columns: 1fr auto; } .sd-pasos { grid-column: 1 / -1; } }

/* casos, apuesta y racha en caliente */
.caso { background: var(--superficie); border: 1px solid var(--borde); border-left: 5px solid var(--durazno-f); border-radius: 0 14px 14px 0; padding: 12px 14px; font-weight: 600; line-height: 1.55; }
.caso .tipo-ej { margin-bottom: 4px; }
.apuesta { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.chip-stat.arde { background: var(--mantequilla); animation: latir 1.2s infinite; }
@keyframes latir { 50% { transform: scale(1.06); } }
.concepto { display: inline; border: 0; padding: 0 1px; margin: 0; font: inherit; color: inherit; background: linear-gradient(transparent 62%, color-mix(in srgb, var(--ok) 28%, transparent) 62%); border-bottom: 2px dotted var(--ok); cursor: help; border-radius: 2px; }
.relampago .rel-tiempo > i { background: linear-gradient(90deg, var(--fuego), var(--oro)); transition: width .1s linear; }

/* audio: reproductor fijo */
.radio-player { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(70px + env(safe-area-inset-bottom)); z-index: 45; width: min(620px, calc(100% - 16px)); background: var(--superficie); border: 1px solid var(--borde); border-radius: 18px; box-shadow: 0 10px 30px rgba(15, 30, 60, .22); padding: 10px 12px; display: flex; flex-direction: column; gap: 6px; }
.radio-player[hidden] { display: none; }
.radio-player.mini { flex-direction: row; align-items: center; width: auto; max-width: calc(100% - 16px); border-radius: 999px; padding: 6px; gap: 6px; }
body:has(.nav-inf.oculto) .radio-player { bottom: calc(12px + env(safe-area-inset-bottom)); }
body.con-radio .principal { padding-bottom: 230px; }
body.con-radio-mini .principal { padding-bottom: 150px; }
.rp-cab { display: flex; align-items: center; gap: 8px; }
.rp-titulo { flex: 1; min-width: 0; text-align: left; border: 0; background: none; padding: 0; cursor: pointer; }
.rp-titulo b, .rp-mini-t b { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .92rem; }
.rp-titulo small { color: var(--texto-3); font-weight: 700; font-size: .78rem; }
.rp-txt { font-weight: 700; font-size: .92rem; color: var(--texto-2); min-height: 2.6em; max-height: 4.2em; overflow: hidden; }
.rp-ctl { display: flex; align-items: center; justify-content: center; gap: 4px; }
.rp-t { font-size: .78rem; font-weight: 800; color: var(--texto-3); min-width: 74px; font-variant-numeric: tabular-nums; }
.rp-b { width: 44px; height: 44px; border: 0; border-radius: 12px; background: transparent; display: grid; place-items: center; cursor: pointer; color: var(--texto); }
.rp-b:hover { background: var(--superficie-2); }
.rp-b:disabled { opacity: .35; cursor: default; }
.rp-b svg { width: 22px; height: 22px; }
.rp-play { background: var(--primario); color: var(--sobre-primario); border-radius: 50%; width: 50px; height: 50px; }
.rp-play:hover { background: var(--primario-2); }
.rp-15 { font-weight: 900; font-size: .85rem; }
.rp-vel { border: 1px solid var(--borde); background: var(--superficie-2); border-radius: 10px; font-weight: 900; min-width: 52px; min-height: 40px; cursor: pointer; margin-left: 4px; }
.rp-mini-t { display: flex; align-items: center; gap: 8px; border: 0; background: none; cursor: pointer; min-width: 0; max-width: 52vw; padding: 0 4px; }
.radio-player.mini .rp-play { width: 42px; height: 42px; }
@media (max-width: 420px) { .rp-t { display: none; } .rp-b { width: 40px; } }
.eq { display: inline-flex; gap: 2px; align-items: flex-end; height: 16px; flex: none; }
.eq i { width: 3px; height: 4px; background: var(--primario); border-radius: 2px; }
.eq.on i { animation: eq .9s infinite ease-in-out; } .eq.on i:nth-child(2) { animation-delay: .2s; } .eq.on i:nth-child(3) { animation-delay: .4s; }
@keyframes eq { 50% { height: 16px; } }
.rd-cap.sonando b { color: var(--primario); }
.rd-grupo > summary, .rd-term > summary { display: flex; align-items: center; gap: 8px; cursor: pointer; list-style: none; }
.rd-grupo > summary b { flex: 1; }
.rd-term { border-bottom: 1px solid var(--borde); padding: 4px 0; }
.rd-term > summary span { flex: 1; font-weight: 800; }
.rd-term p { margin: 4px 0 6px; color: var(--texto-2); font-weight: 600; }
.rd-term.sonando { background: var(--primario-suave); border-radius: 8px; }
.rd-term.sonando > summary span { color: var(--primario); }

/* mapa y logros */
.logros { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(46%, 150px), 1fr)); gap: 10px; }
.logro { border: 1px solid var(--borde); border-radius: 14px; padding: 12px; text-align: center; display: flex; flex-direction: column; gap: 2px; align-items: center; opacity: .55; filter: grayscale(1); }
.logro span { font-size: 1.8rem; } .logro small { color: var(--texto-3); font-weight: 700; line-height: 1.25; }
.logro.ok { opacity: 1; filter: none; background: var(--mantequilla); border-color: transparent; } .logro.ok small { color: var(--mantequilla-f); }

/* app instalable */
.pwa-tarjeta { position: fixed; z-index: 55; left: 50%; transform: translateX(-50%); top: 66px; width: min(560px, calc(100% - 16px)); display: flex; align-items: center; gap: 10px; background: var(--superficie); border: 1px solid var(--borde); border-radius: 16px; box-shadow: 0 10px 30px rgba(15, 30, 60, .2); padding: 10px 12px; font-weight: 600; font-size: .92rem; }
.pwa-tarjeta img { border-radius: 10px; flex: none; }
.pwa-tarjeta span { flex: 1; }

/* ======================= v3: Mastery Learning (cero frustración) ======================= */
/* Modo Misión: borde y banda que avisan que es una misión especial de rescate (respeta azul pastel y sepia) */
body.modo-mision #app, body.modo-codigo-azul #app, body.modo-extra #app { box-shadow: inset 0 0 0 5px var(--marco-reto); min-height: 100vh; }
body.modo-mision { --marco-reto: color-mix(in srgb, var(--lavanda-f) 55%, transparent); }
body.modo-codigo-azul { --marco-reto: color-mix(in srgb, var(--primario) 75%, transparent); }
body.modo-extra { --marco-reto: color-mix(in srgb, var(--oro) 60%, transparent); }
body.modo-codigo-azul #app { animation: alarma-azul 1.6s ease-in-out infinite; }
@keyframes alarma-azul { 50% { box-shadow: inset 0 0 0 8px color-mix(in srgb, var(--primario) 35%, transparent); } }
.banda-reto { border-radius: 14px; padding: 9px 14px; font-weight: 900; text-align: center; letter-spacing: .02em; background: var(--lavanda); color: var(--lavanda-f); }
body.modo-codigo-azul .banda-reto { background: var(--primario); color: var(--sobre-primario); text-transform: uppercase; }
body.modo-extra .banda-reto { background: var(--mantequilla); color: var(--mantequilla-f); }
.pie-sesion.pista { background: var(--lavanda); border-color: transparent; }
.pie-sesion.pista h3 { color: var(--lavanda-f); }
/* racha en estado crítico: signos vitales débiles */
.ecg { display: inline-block; width: 42px; height: 18px; color: var(--error); }
.ecg svg { width: 100%; height: 100%; display: block; }
.ecg.grande { width: min(280px, 80%); height: 56px; margin: 0 auto; color: var(--primario); }
.ecg-linea { stroke-dasharray: 160; stroke-dashoffset: 160; animation: latido-ecg 2.4s linear infinite; }
.ecg-linea.debil { animation-duration: 3.6s; opacity: .8; }
@keyframes latido-ecg { to { stroke-dashoffset: 0; } }
.chip-stat.critica { color: var(--error); background: var(--error-suave); border-color: transparent; text-decoration: none; animation: latir 2.4s infinite; }
.alerta-azul, .alerta-mision { display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center; text-decoration: none; color: inherit; }
.alerta-azul { border: 2px solid var(--primario); background: var(--primario-suave); }
.alerta-azul .ecg { width: 56px; height: 30px; }
.alerta-mision { border: 2px solid var(--lavanda-f); background: var(--lavanda); }
@media (max-width: 460px) { .alerta-azul, .alerta-mision { grid-template-columns: auto 1fr; } .alerta-azul .btn, .alerta-mision .btn { grid-column: 1 / -1; } }

.enlace-reportar { align-self: center; border: 0; background: none; color: var(--texto-3); font-weight: 700; font-size: .82rem; cursor: pointer; padding: 6px 10px; text-decoration: underline; text-underline-offset: 3px; }
.enlace-reportar:hover { color: var(--error); }

/* firma discreta de la agencia */
.firma-mys { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 6px 10px; padding: 0 16px calc(84px + env(safe-area-inset-bottom)); margin-top: -64px; font-size: .78rem; font-weight: 700; color: var(--texto-3); }
.firma-mys a { display: inline-flex; align-items: center; gap: 6px; color: inherit; text-decoration: none; padding: 6px 4px; border-radius: 8px; }
.firma-mys a:hover { color: var(--primario); }
.firma-mys img { width: 18px; height: 18px; border-radius: 5px; }
.firma-mys svg { width: 15px; height: 15px; }
.firma-mys b { font-weight: 900; }
.login .firma-mys, main[style] + .firma-mys { margin-top: 10px; padding-bottom: calc(14px + env(safe-area-inset-bottom)); }
body:has(.nav-inf.oculto) .firma-mys { display: none; }
body.con-radio .firma-mys { padding-bottom: 230px; }
body.con-radio-mini .firma-mys { padding-bottom: 150px; }
/* planes */
.planes { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 210px), 1fr)); gap: 12px; align-items: stretch; }
.plan { position: relative; display: flex; flex-direction: column; gap: 8px; padding-top: 26px; }
.plan .btn { margin-top: auto; }
.plan.destacado { border: 2px solid var(--primario); box-shadow: 0 10px 30px color-mix(in srgb, var(--primario) 22%, transparent); }
.plan.pronto { opacity: .75; }
.plan-cinta { position: absolute; top: -11px; left: 14px; right: 14px; text-align: center; background: var(--primario); color: var(--sobre-primario); font-size: .74rem; font-weight: 900; border-radius: 999px; padding: 3px 8px; }
.plan-cinta.gris { background: var(--superficie-2); color: var(--texto-2); border: 1px solid var(--borde); }
.plan-precio { font-size: 1.7rem; font-weight: 900; line-height: 1.1; }
.plan-precio small { display: block; font-size: .78rem; font-weight: 700; color: var(--texto-3); }
.plan-incluye { margin: 0; padding-left: 0; list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); gap: 6px 14px; }
.plan-incluye li { font-weight: 700; color: var(--texto-2); }
.plan-incluye li::before { content: '✓ '; color: var(--ok); font-weight: 900; }

/* calificación con estrellas */
.estrellas { display: flex; justify-content: center; gap: 6px; margin: 14px 0 4px; }
.estrella { border: 0; background: none; font-size: 2.4rem; line-height: 1; color: var(--borde); cursor: pointer; padding: 2px 4px; transition: transform .12s, color .12s; min-width: 44px; min-height: 44px; }
.estrella.llena { color: var(--oro); }
.estrella:hover { transform: scale(1.12); }