/* Pepe Morato Development · Web realizada por Tapití Social Media
   Papel y tinta (la firma y el pergamino de siempre) + los siete colores de ARTRADE. */

:root {
    --papel: #f4eee2;
    --papel-alterno: #ebe3d3;
    --superficie: #fbf8f2;
    --tinta: #1c1a17;
    --tinta-suave: #5f5950;
    --borde: #d9cfbd;
    --acento: #ff3300;          /* el botón de contacto de la web original */
    --acento-texto: #ffffff;
    --error: #b3261e;
    --ok: #1d7a3e;
    --c1: #3366ff;  /* A azul */
    --c2: #ff3333;  /* R rojo */
    --c3: #ffcc00;  /* T amarillo */
    --c4: #111111;  /* R negro */
    --c5: #00b300;  /* A verde */
    --c6: #9933cc;  /* D violeta */
    --c7: #ff6633;  /* E naranja */
    --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --radio: 14px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --papel: #14130f;
        --papel-alterno: #1b1a15;
        --superficie: #211f1a;
        --tinta: #efe8da;
        --tinta-suave: #b3ab9c;
        --borde: #36332b;
        --acento: #ff6a3d;
        --acento-texto: #160a04;
        --error: #ff8a80;
        --ok: #7fd89d;
        --c4: #e9e4d8;  /* la bola negra se vuelve tiza */
    }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
    margin: 0; background: var(--papel); color: var(--tinta);
    font: 17px/1.7 var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.12; margin: 0 0 .5em; text-wrap: balance; }
h1 { font-size: clamp(2.6rem, 7vw, 5rem); letter-spacing: -.02em; }
h1 em { font-style: italic; color: var(--acento); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration-color: var(--acento); text-underline-offset: 3px; }
a:hover { color: var(--acento); }
img { max-width: 100%; height: auto; }

.contenedor { width: min(1120px, 100% - 32px); margin-inline: auto; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.saltar { position: absolute; left: -999px; top: 8px; background: var(--superficie); padding: 8px 14px; z-index: 100; }
.saltar:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--c1); outline-offset: 3px; }

.etiqueta { font-size: .78rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; color: var(--tinta-suave); margin-bottom: 1em; }

/* Botones */
.boton {
    display: inline-flex; align-items: center; justify-content: center;
    padding: .75em 1.5em; border-radius: 999px; border: 2px solid var(--acento);
    background: var(--acento); color: var(--acento-texto); font: inherit; font-weight: 700;
    text-decoration: none; cursor: pointer; transition: transform .15s, box-shadow .15s;
}
.boton:hover { color: var(--acento-texto); transform: translateY(-2px); box-shadow: 0 8px 22px color-mix(in srgb, var(--acento) 35%, transparent); }
.boton:disabled { opacity: .6; cursor: wait; transform: none; }
.boton-linea { background: transparent; color: var(--tinta); border-color: var(--tinta); }
.boton-linea:hover { color: var(--tinta); box-shadow: none; }

/* Cabecera */
.cabecera {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in srgb, var(--papel) 88%, transparent);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--borde);
}
.cabecera-fila { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 66px; }
.marca img { display: block; height: 38px; width: auto; }
.firma-oscuro { display: none !important; }
@media (prefers-color-scheme: dark) {
    .firma-claro { display: none !important; }
    .firma-oscuro { display: block !important; }
}
.menu { display: flex; align-items: center; gap: 24px; }
.menu a:not(.boton) { text-decoration: none; font-weight: 600; }
.menu .boton { padding: .5em 1.2em; }
.menu-boton { display: none; background: none; border: 0; padding: 10px; cursor: pointer; color: var(--tinta); }
.hamburguesa, .hamburguesa::before, .hamburguesa::after { display: block; width: 24px; height: 2px; background: currentColor; position: relative; transition: transform .2s; }
.hamburguesa::before, .hamburguesa::after { content: ""; position: absolute; left: 0; }
.hamburguesa::before { top: -7px; }
.hamburguesa::after { top: 7px; }
.menu-boton[aria-expanded="true"] .hamburguesa { background: transparent; }
.menu-boton[aria-expanded="true"] .hamburguesa::before { transform: translateY(7px) rotate(45deg); }
.menu-boton[aria-expanded="true"] .hamburguesa::after { transform: translateY(-7px) rotate(-45deg); }
@media (max-width: 820px) {
    .menu-boton { display: block; }
    .menu {
        position: absolute; top: 100%; left: 0; right: 0; display: none;
        flex-direction: column; align-items: stretch; gap: 0;
        background: var(--superficie); border-bottom: 1px solid var(--borde); padding: 8px 16px 16px;
    }
    .menu.abierto { display: flex; }
    .menu a:not(.boton) { padding: 12px 4px; border-bottom: 1px solid var(--borde); }
    .menu .boton { margin-top: 12px; }
}

/* Portada */
.portada { position: relative; overflow: hidden; padding: clamp(56px, 9vw, 120px) 0 clamp(64px, 9vw, 110px); }
.portada-fondo {
    position: absolute; right: -8%; top: 50%; transform: translateY(-50%);
    width: min(1000px, 85vw); opacity: .55; mix-blend-mode: multiply; pointer-events: none; user-select: none;
}
@media (prefers-color-scheme: dark) { .portada-fondo { filter: invert(1); mix-blend-mode: screen; opacity: .35; } }
@media (max-width: 820px) { .portada-fondo { right: -30%; top: auto; bottom: -4%; transform: none; width: 130vw; opacity: .3; } }
.portada-texto { position: relative; }
.portada-texto > * { max-width: 720px; }
.entradilla { font-size: 1.2rem; color: var(--tinta-suave); max-width: 34em; }
.acciones { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

/* Bolas ARTRADE */
.artrade { display: flex; flex-wrap: wrap; gap: 8px; margin: 32px 0 10px; }
.bola {
    display: inline-grid; place-items: center; flex: none;
    width: 48px; height: 48px; border-radius: 50%;
    font: 600 1.25rem/1 var(--sans); color: #fff; background: var(--c);
    box-shadow: 0 0 0 3px var(--papel), 0 0 0 4px var(--borde), 3px 4px 8px rgba(0, 0, 0, .25);
    transition: transform .25s cubic-bezier(.3, 1.6, .5, 1);
}
.artrade .bola:hover { transform: translateY(-6px) rotate(-8deg); }
.c1 { --c: var(--c1); } .c2 { --c: var(--c2); } .c3 { --c: var(--c3); } .c4 { --c: var(--c4); }
.c5 { --c: var(--c5); } .c6 { --c: var(--c6); } .c7 { --c: var(--c7); }
.c3 .bola, .bola.c3 { color: #1c1a17; }
@media (prefers-color-scheme: dark) { .c4 .bola, .bola.c4 { color: #14130f; } }
.artrade-lema { color: var(--tinta-suave); }
.artrade-lema strong { color: var(--tinta); letter-spacing: .1em; }

/* Secciones */
.seccion { padding: clamp(56px, 8vw, 100px) 0; }
.seccion-alterna { background: var(--papel-alterno); }
.seccion-cabecera { max-width: 720px; margin-bottom: 44px; }
.seccion-cabecera p:last-child:not(.etiqueta) { color: var(--tinta-suave); }

/* Manifiesto */
.manifiesto { border-top: 1px solid var(--borde); }
.manifiesto-rejilla { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.manifiesto blockquote { margin: 0; font-family: var(--serif); font-size: clamp(1.4rem, 2.6vw, 2rem); line-height: 1.35; font-style: italic; border-left: 4px solid var(--acento); padding-left: 24px; }
.manifiesto blockquote p { margin: 0; }
@media (max-width: 820px) { .manifiesto-rejilla { grid-template-columns: 1fr; gap: 28px; } }

/* Disciplinas */
.disciplinas { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px; }
.disciplina {
    position: relative; background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio);
    padding: 26px 24px 24px; overflow: hidden; transition: translate .2s, border-color .2s, opacity .6s ease, transform .6s ease;
}
.disciplina::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: var(--c); transform: scaleX(.15); transform-origin: left; transition: transform .35s; }
.disciplina:hover { translate: 0 -4px; border-color: var(--c); }
.disciplina:hover::after { transform: scaleX(1); }
.disciplina .bola { width: 42px; height: 42px; font-size: 1.1rem; margin-bottom: 16px; box-shadow: 2px 3px 6px rgba(0, 0, 0, .2); }
.disciplina p { margin: 0; color: var(--tinta-suave); }

/* Método */
.metodo { list-style: none; margin: 0; padding: 0; position: relative; display: grid; gap: 4px; max-width: 820px; }
.metodo::before { content: ""; position: absolute; left: 23px; top: 24px; bottom: 24px; width: 2px; background: repeating-linear-gradient(var(--borde) 0 6px, transparent 6px 12px); }
.metodo li { position: relative; display: grid; grid-template-columns: 48px 1fr; gap: 22px; align-items: start; padding: 12px 0; }
.metodo h3 { margin: .25em 0 .2em; }
.metodo p { margin: 0; color: var(--tinta-suave); }

/* Yo · Tú · Él */
.seccion-tinta { background: #1c1a17; color: #efe8da; }
.seccion-tinta .etiqueta { color: #b3ab9c; }
@media (prefers-color-scheme: dark) { .seccion-tinta { background: #0d0c0a; } }
.pestanas-lista { display: none; gap: 10px; margin-bottom: 28px; }
.pestanas.activas .pestanas-lista { display: flex; }
.pestanas-lista button {
    font: 600 1.6rem/1 var(--serif); font-style: italic; color: #efe8da; background: transparent;
    border: 2px solid #4a463d; border-radius: 999px; padding: .45em 1.3em; cursor: pointer; transition: all .2s;
}
.pestanas-lista button:hover { border-color: #efe8da; }
.pestanas-lista button[aria-selected="true"] { background: #ff3300; border-color: #ff3300; color: #fff; }
.pestana { max-width: 760px; font-size: 1.12rem; }
.pestanas:not(.activas) .pestana { margin-bottom: 36px; }
.pestana h3 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.pestana p { color: #d9d1c1; }

/* Obra */
.obras { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
@media (max-width: 760px) { .obras { grid-template-columns: 1fr; } }
.obra {
    display: block; text-decoration: none; color: inherit; background: var(--superficie);
    border: 1px solid var(--borde); border-left: 6px solid var(--c); border-radius: var(--radio);
    padding: 26px; transition: transform .2s, box-shadow .2s;
}
.obra:hover { color: inherit; translate: 0 -3px; box-shadow: 0 14px 34px rgba(0, 0, 0, .1); }
.obra-tipo { display: block; font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--tinta-suave); margin-bottom: .6em; }
.obra p { color: var(--tinta-suave); }
.obra-ir { font-weight: 700; color: var(--acento); }

/* Contacto */
.contacto-rejilla { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: start; }
@media (max-width: 860px) { .contacto-rejilla { grid-template-columns: 1fr; gap: 28px; } }
.responsable { font-size: .95rem; color: var(--tinta-suave); border-top: 1px dashed var(--borde); padding-top: 16px; margin-top: 24px; }
.formulario { background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio); padding: clamp(20px, 4vw, 32px); display: grid; gap: 16px; }
.campo { display: grid; gap: 6px; }
.campo label { font-weight: 700; font-size: .95rem; }
.campo input, .campo select, .campo textarea {
    width: 100%; font: inherit; color: var(--tinta); background: var(--papel);
    border: 1.5px solid var(--borde); border-radius: 10px; padding: .7em .9em;
}
.campo input:focus, .campo select:focus, .campo textarea:focus { outline: none; border-color: var(--tinta); }
.campo-oculto { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.casilla { display: flex; gap: 10px; align-items: flex-start; font-size: .92rem; color: var(--tinta-suave); }
.casilla input { margin-top: .3em; width: 18px; height: 18px; flex: none; accent-color: var(--acento); }
.resultado { margin: 0; font-weight: 700; min-height: 1.4em; }
.resultado.error { color: var(--error); }
.resultado.ok { color: var(--ok); }

/* Pie */
.pie { border-top: 1px solid var(--borde); padding: 40px 0 34px; }
.pie-fila { display: grid; justify-items: center; text-align: center; gap: 10px; }
.artrade-pie { margin: 0 0 8px; gap: 5px; justify-content: center; }
.artrade-pie .bola { width: 26px; height: 26px; font-size: .75rem; box-shadow: 1px 2px 4px rgba(0, 0, 0, .2); }
.pie p { margin: 0; font-size: .9rem; color: var(--tinta-suave); }
.pie-enlaces { display: flex; flex-wrap: wrap; justify-content: center; gap: 18px; font-size: .9rem; }
.credito { font-size: .8rem !important; }

/* Aparición al hacer scroll (../js/grupo.js) */
.con-js .aparece { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.con-js .aparece.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .bola, .disciplina, .obra, .boton { transition: none; }
}