/* =====================================================================
   Centro de Artes — landing
   Paleta: tinta del río de noche, ladrillo de la plaza de toros, papel.
   ===================================================================== */
:root {
  --tinta: #16213a;
  --tinta-2: #0e1628;
  --ladrillo: #b4532a;
  --ladrillo-osc: #923f1d;
  --arena: #e7b08a;
  --rio: #3d6c8c;
  --papel: #f3ece0;
  --papel-2: #fffaf2;
  --papel-3: #ebdfcb;
  --linea: #e1d3bd;
  --texto: #1d2433;
  --suave: #5f584c;

  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --ancho: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --radio: 18px;
  --sombra: 0 24px 60px -28px rgba(14, 22, 40, .45);
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--papel);
  color: var(--texto);
  font: 400 1.0625rem/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.08; margin: 0; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
em { font-style: italic; }
[hidden] { display: none !important; }

.saltar { position: absolute; left: -999px; top: 8px; background: var(--ladrillo); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.saltar:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--arena); outline-offset: 3px; border-radius: 4px; }

.cont { width: 100%; max-width: var(--ancho); margin: 0 auto; padding: 0 var(--gutter); }
.seccion { padding: clamp(72px, 10vw, 132px) 0; position: relative; }
section[id] { scroll-margin-top: 70px; }

.rotulo {
  font: 600 .78rem/1.2 var(--sans);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ladrillo);
  margin-bottom: 18px;
  display: flex; align-items: center; gap: 12px;
}
.rotulo::before { content: ""; width: 28px; height: 1.5px; background: currentColor; }
.titulo { font-size: clamp(2.2rem, 5vw, 3.6rem); margin-bottom: 26px; }
.titulo em { color: var(--ladrillo); }
.encab { max-width: 640px; margin-bottom: clamp(36px, 6vw, 64px); }

/* ---------------------------------------------------------------- botones */
.btn {
  --bg: var(--ladrillo); --fg: #fff;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  background: var(--bg); color: var(--fg);
  font: 600 1rem/1 var(--sans);
  padding: 16px 28px; border-radius: 999px; border: 1.5px solid var(--bg);
  text-decoration: none; cursor: pointer;
  transition: transform .25s var(--ease), background .25s, color .25s, border-color .25s, box-shadow .25s;
}
.btn:hover { --bg: var(--ladrillo-osc); transform: translateY(-2px); box-shadow: 0 10px 24px -12px rgba(180, 83, 42, .8); }
.btn--linea { background: transparent; color: currentColor; border-color: currentColor; }
.btn--linea:hover { box-shadow: none; }
.btn--chico { padding: 10px 18px; font-size: .9rem; }
.btn--ancho { width: 100%; }

/* hover de botones de línea según fondo */
.hero .btn--linea:hover, .inscripcion .btn--linea:hover { background: var(--papel); color: var(--tinta); border-color: var(--papel); }
.sede .btn--linea:hover, .form-ok .btn--linea:hover { background: var(--tinta); color: var(--papel); border-color: var(--tinta); }

/* ---------------------------------------------------------------- nav */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  color: var(--papel);
  transition: background .35s, box-shadow .35s, padding .35s;
  padding: 14px 0;
}
.nav.solida { background: rgba(14, 22, 40, .92); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 1px 0 rgba(255, 255, 255, .06); padding: 8px 0; }
.nav__in { max-width: var(--ancho); margin: 0 auto; padding: 0 var(--gutter); display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.nav__marca { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.nav__logo { width: 34px; height: auto; --logo-alfiz: var(--arena); }
.logotipo { display: flex; flex-direction: column; font: 600 1.22rem/.98 var(--serif); font-variation-settings: "opsz" 48; letter-spacing: -.005em; }
.logotipo--pie { font-size: 1.4rem; color: var(--papel); }
.nav .logotipo { flex-direction: row; gap: .28em; white-space: nowrap; font-size: 1.35rem; line-height: 1; }
@media (max-width: 960px) { .nav__logo { width: 33px; } }
@media (max-width: 360px) { .nav .logotipo { font-size: 1.15rem; } .nav__logo { width: 38px; } }
.nav__logo .logo-gaviotas, .pie__logo .logo-gaviotas { display: none; }
@media (min-width: 961px) {
  .nav__marca { gap: 18px; }
  .nav__logo { width: 60px; }
  .nav.solida .nav__logo { width: 47px; }
  .nav__logo { transition: width .35s var(--ease); }
  .nav .logotipo { flex-direction: row; gap: .28em; font-size: 2.05rem; line-height: 1; white-space: nowrap; }
  .nav.solida .logotipo { font-size: 1.7rem; }
  .nav .logotipo { transition: font-size .35s var(--ease); }
  .nav__logo .logo-gaviotas { display: inline; }
}
.nav__links { display: flex; align-items: center; gap: 30px; }
.nav__links a:not(.btn) { text-decoration: none; font-size: .95rem; font-weight: 500; opacity: .85; position: relative; }
.nav__links a:not(.btn)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 1.5px; background: var(--arena); transition: right .3s var(--ease); }
.nav__links a:not(.btn):hover { opacity: 1; }
.nav__links a:not(.btn):hover::after, .nav__links a.activo::after { right: 0; }
.nav__links a.activo { opacity: 1; }
.nav__toggle { display: none; background: none; border: 0; width: 44px; height: 44px; padding: 10px; cursor: pointer; color: inherit; }
.nav__toggle span { display: block; height: 2px; background: currentColor; margin: 6px 0; transition: transform .3s var(--ease); }
.nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------------------------------------------------------------- hero */
.hero {
  position: relative;
  min-height: 100vh; min-height: 100svh;
  background:
    radial-gradient(60% 55% at 78% 38%, rgba(231, 176, 138, .22), transparent 70%),
    radial-gradient(50% 60% at 10% 90%, rgba(61, 108, 140, .35), transparent 70%),
    var(--tinta);
  color: var(--papel);
  display: flex; align-items: center;
  padding: 120px 0 170px;
  overflow: hidden;
}
.hero::before { /* grano */
  content: ""; position: absolute; inset: 0; opacity: .07; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.hero__in { position: relative; z-index: 2; width: 100%; max-width: var(--ancho); margin: 0 auto; padding: 0 var(--gutter); display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(30px, 5vw, 80px); align-items: center; }
.hero .rotulo { color: var(--arena); }
.hero__titulo { font-size: clamp(3.2rem, 9vw, 7.4rem); line-height: .95; margin-bottom: 22px; }
.hero__pre { display: block; font: 500 clamp(1rem, 1.6vw, 1.2rem)/1.3 var(--sans); letter-spacing: .02em; opacity: .75; margin-bottom: 14px; }
.hero__titulo em { font-weight: 300; font-variation-settings: "opsz" 144; display: block; }
.hero__sub { font: 400 clamp(1.1rem, 2vw, 1.35rem)/1.5 var(--serif); opacity: .88; max-width: 34ch; margin-bottom: 34px; }

.hero__fechas { list-style: none; margin: 0 0 34px; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; max-width: 640px; }
.hero__fechas li { display: flex; min-width: 0; }
.hero__fechas a { width: 100%; }
.hero__fechas a {
  display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; column-gap: 14px; align-items: center;
  text-decoration: none; padding: 12px 20px 12px 14px; border-radius: 16px;
  border: 1px solid rgba(243, 236, 224, .2); background: rgba(243, 236, 224, .05);
  transition: background .3s, border-color .3s, transform .3s var(--ease);
}
.hero__fechas a:hover { background: rgba(243, 236, 224, .12); border-color: var(--arena); transform: translateY(-2px); }
.fch__dia { grid-row: 1 / 3; font: 400 2.6rem/1 var(--serif); color: var(--arena); min-width: 1.4em; text-align: center; }
.fch__mes { font: 700 .72rem/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; opacity: .7; align-self: end; }
.fch__lugar { font: 600 1rem/1.25 var(--sans); align-self: start; }
.fch__lugar small { display: block; font-weight: 400; font-size: .82rem; opacity: .7; }

.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
@media (min-width: 961px) {
  .hero__cta { margin-bottom: 0; max-width: 640px; justify-content: center; }
  .hero__in { row-gap: 26px; }
  .hero { padding-bottom: 150px; }
}

.cuenta { display: inline-flex; flex-direction: column; gap: 10px; }
.cuenta__rot { font-size: .82rem; letter-spacing: .08em; opacity: .75; }
.cuenta__rot b { color: var(--arena); font-weight: 600; }
.cuenta__nums { display: flex; gap: 10px; }
.cuenta__nums span { display: flex; flex-direction: column; align-items: center; min-width: 64px; padding: 10px 8px; border-radius: 12px; background: rgba(243, 236, 224, .06); font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; opacity: .9; }
.cuenta__nums b { font: 400 1.7rem/1.1 var(--serif); letter-spacing: 0; font-variant-numeric: tabular-nums; }
@media (min-width: 961px) {
  .cuenta { grid-column: 1 / -1; justify-self: center; align-items: center; gap: 16px; margin-top: 0; }
  .cuenta__rot { font-size: .95rem; letter-spacing: .22em; text-transform: uppercase; }
  .cuenta__nums { gap: 16px; }
  .cuenta__nums span { min-width: 112px; padding: 18px 14px 14px; border-radius: 18px; background: rgba(243, 236, 224, .07); border: 1px solid rgba(231, 176, 138, .28); font-size: .78rem; letter-spacing: .2em; }
  .cuenta__nums b { font-size: 3.4rem; line-height: 1; margin-bottom: 8px; color: var(--papel); }
  .cuenta__nums span:first-child b { color: var(--arena); }
}

.hero__arte { position: relative; justify-self: center; width: min(100%, 440px); }
.hero__marco { position: relative; animation: flotar 7s ease-in-out infinite; }
.hero__marco::before { /* sol */
  content: ""; position: absolute; width: 70%; aspect-ratio: 1; left: 15%; top: 4%;
  border-radius: 50%; background: radial-gradient(circle, rgba(231, 176, 138, .35), transparent 65%); filter: blur(10px); z-index: -1;
}
.hero__logo { width: 100%; height: auto; --logo-alfiz: var(--arena); --logo-fondo: var(--tinta); filter: drop-shadow(0 30px 40px rgba(0, 0, 0, .35)); }
.hero__logo .logo-barco { transform-box: fill-box; transform-origin: 50% 100%; animation: mecer 4.5s ease-in-out infinite; }
.hero__logo .logo-agua path { animation: deriva 6s linear infinite; }
.hero__logo .logo-agua path + path { animation-duration: 9s; animation-direction: reverse; }
.hero__logo .logo-gaviotas path { transform-box: fill-box; transform-origin: 50% 70%; animation: aletear 1.6s ease-in-out infinite; }
.hero__logo .logo-gaviotas .gv2 { animation-delay: -.7s; animation-duration: 1.9s; }
.hero__gaviotas { position: absolute; inset: -14% -10% auto; height: 40%; pointer-events: none; z-index: 2; }
.gv { position: absolute; display: block; color: var(--papel); opacity: .85; animation: planear 18s ease-in-out infinite; }
.gv svg { width: 100%; overflow: visible; }
.gv path { fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; transform-box: fill-box; transform-origin: 50% 80%; animation: aletear 1.4s ease-in-out infinite; }
.gv--a { width: 42px; left: 6%; top: 34%; }
.gv--b { width: 28px; left: 20%; top: 8%; animation-duration: 22s; animation-delay: -6s; opacity: .7; }
.gv--b path { animation-duration: 1.7s; animation-delay: -.5s; }
.gv--c { width: 18px; right: 10%; top: 22%; animation-duration: 26s; animation-delay: -12s; opacity: .55; }
.gv--c path { animation-duration: 1.2s; animation-delay: -.3s; }
@keyframes aletear { 0%, 100% { transform: scaleY(1); } 50% { transform: scaleY(.35) translateY(1px); } }
@keyframes planear { 0%, 100% { transform: translate(0, 0) rotate(-3deg); } 25% { transform: translate(26px, -10px) rotate(2deg); } 50% { transform: translate(48px, 4px) rotate(-2deg); } 75% { transform: translate(20px, 12px) rotate(3deg); } }
.hero__orilla { position: absolute; font: italic 300 1rem/1 var(--serif); color: var(--arena); opacity: .8; white-space: nowrap; }
.hero__orilla::before { content: "— "; }
.hero__orilla--a { left: -6%; top: 18%; transform: rotate(-90deg) translateX(-50%); transform-origin: left top; }
.hero__orilla--b { right: -6%; bottom: 22%; transform: rotate(90deg) translateX(50%); transform-origin: right bottom; }

.hero__olas { position: absolute; left: 0; right: 0; bottom: -1px; height: 160px; z-index: 1; overflow: hidden; }
.hero__olas svg { width: 125%; height: 100%; }
.ola { fill: var(--papel); }
.ola1 { opacity: .35; animation: olas 14s linear infinite; }
.ola2 { animation: olas 20s linear infinite reverse; }

@keyframes flotar { 50% { transform: translateY(-12px); } }
@keyframes mecer { 0%, 100% { transform: rotate(-2.5deg) translateY(0); } 50% { transform: rotate(2.5deg) translateY(-1.5px); } }
@keyframes deriva { to { transform: translateX(-20px); } }
@keyframes olas { to { transform: translateX(-360px); } }

/* ---------------------------------------------------------------- libro */
.libro__grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(40px, 7vw, 110px); align-items: center; }
.libro__texto { max-width: 600px; color: var(--suave); }
.libro__texto .titulo + p { font: 400 clamp(1.2rem, 2vw, 1.4rem)/1.5 var(--serif); color: var(--texto); }
.libro__texto .titulo { color: var(--texto); }
.libro__tapa { perspective: 1200px; display: flex; justify-content: center; }
.tapa {
  --rx: 0deg; --ry: -16deg;
  position: relative; width: min(100%, 340px); aspect-ratio: 2 / 3;
  transform-style: preserve-3d; transform: rotateX(var(--rx)) rotateY(var(--ry));
  transition: transform .6s var(--ease);
}
.tapa__cara {
  position: absolute; inset: 0; border-radius: 4px 12px 12px 4px; overflow: hidden;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, .28), rgba(255, 255, 255, .08) 3%, transparent 7%),
    radial-gradient(90% 60% at 70% 10%, rgba(231, 176, 138, .25), transparent 60%),
    var(--tinta);
  color: var(--papel);
  display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: 34px 26px 26px 34px;
  box-shadow: var(--sombra), 30px 40px 60px -30px rgba(14, 22, 40, .5);
}
.tapa__lomo { position: absolute; top: 0; bottom: 0; left: 0; width: 34px; background: var(--tinta-2); transform: rotateY(-90deg); transform-origin: left; }
.tapa__autores { font: 600 .66rem/1.4 var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--arena); }
.tapa__titulo { font: italic 300 clamp(2rem, 4vw, 2.7rem)/1 var(--serif); margin: 18px 0 8px; }
.tapa__sub { font: 400 .9rem/1.4 var(--serif); opacity: .8; }
.tapa__logo { width: 46%; margin: auto 0 14px; --logo-alfiz: var(--arena); --logo-fondo: var(--tinta); }
.tapa__ed { font: 600 .62rem/1 var(--sans); letter-spacing: .24em; text-transform: uppercase; opacity: .6; }

.cita { margin: 30px 0; padding: 4px 0 4px 24px; border-left: 3px solid var(--ladrillo); font: italic 400 clamp(1.15rem, 2.1vw, 1.4rem)/1.45 var(--serif); color: var(--texto); }
.cita p { margin: 0 0 10px; }
.cita cite { font: 600 .78rem/1 var(--sans); font-style: normal; letter-spacing: .16em; text-transform: uppercase; color: var(--ladrillo); }
.cita cite::before { content: "— "; }
.ficha { display: flex; flex-wrap: wrap; gap: 14px 40px; margin: 0; padding-top: 24px; border-top: 1px solid var(--linea); }
.ficha dt { font: 700 .7rem/1 var(--sans); letter-spacing: .18em; text-transform: uppercase; color: var(--ladrillo); margin-bottom: 6px; }
.ficha dd { margin: 0; font: 400 1.15rem/1.2 var(--serif); color: var(--texto); }

/* ---------------------------------------------------------------- franja */
.franja { background: var(--ladrillo); color: var(--papel); overflow: hidden; padding: 22px 0; border-block: 1px solid var(--ladrillo-osc); }
.franja__pista { display: flex; width: max-content; align-items: center; gap: 28px; animation: marquesina 40s linear infinite; }
.franja span { font: italic 300 clamp(1.5rem, 3vw, 2.2rem)/1 var(--serif); white-space: nowrap; }
.franja i { font-style: normal; color: var(--arena); font-size: 1.3rem; }
@keyframes marquesina { to { transform: translateX(-50%); } }

/* ---------------------------------------------------------------- autores */
.autores__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); gap: clamp(28px, 4vw, 56px); }
.autor { display: grid; grid-template-columns: 190px 1fr; gap: 28px; align-items: start; }
.autor h3 { font-size: 1.9rem; margin-bottom: 6px; }
.autor--sin-foto { grid-template-columns: 1fr; align-self: center; padding-left: 24px; border-left: 3px solid var(--ladrillo); }
.autor__rol { font: 600 .78rem/1.3 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--ladrillo); margin-bottom: 14px; }
.autor__txt p:last-child { color: var(--suave); margin: 0; }

.arco-foto {
  position: relative; width: 100%; aspect-ratio: 3 / 4;
  border-radius: 999px 999px 6px 6px;
  background: linear-gradient(160deg, var(--ladrillo), var(--ladrillo-osc));
  display: grid; place-items: center; isolation: isolate;
}
.arco-foto::after { content: ""; position: absolute; inset: -8px -8px 8px 8px; border: 1.5px solid var(--ladrillo); border-radius: inherit; z-index: -1; transition: inset .5s var(--ease); }
.autor:hover .arco-foto::after, .anfitrion__grid:hover .arco-foto::after { inset: -12px -12px 12px 12px; }
.arco-foto img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; border-radius: inherit; }
.arco-foto__ini { font: italic 300 3.2rem/1 var(--serif); color: var(--papel); }

/* ---------------------------------------------------------------- sedes */
.sedes { background: var(--papel-3); }
.sedes__grid { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 48px); padding-top: 40px; }
.sedes__ruta { position: absolute; left: 22%; right: 22%; top: -14px; height: 70px; width: 56%; color: var(--ladrillo); opacity: .7; }
.sedes__ruta path { animation: ruta 2.2s linear infinite; }
@keyframes ruta { to { stroke-dashoffset: -18; } }
.sede {
  position: relative; background: var(--papel-2); border-radius: var(--radio); padding: clamp(28px, 4vw, 44px);
  border: 1px solid var(--linea); box-shadow: 0 20px 50px -36px rgba(14, 22, 40, .5);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}
.sede::before { content: ""; position: absolute; left: clamp(28px, 4vw, 44px); top: -1px; width: 56px; height: 4px; background: var(--ladrillo); border-radius: 0 0 4px 4px; }
.sede:hover { transform: translateY(-4px); box-shadow: 0 30px 60px -34px rgba(14, 22, 40, .55); }
.sede__pais { font: 700 .74rem/1 var(--sans); letter-spacing: .22em; text-transform: uppercase; color: var(--rio); margin-bottom: 10px; }
.sede__ciudad { font-size: clamp(1.9rem, 3.4vw, 2.6rem); margin-bottom: 26px; }
.sede__fecha { display: flex; align-items: center; gap: 18px; padding: 18px 0; border-block: 1px solid var(--linea); margin-bottom: 22px; }
.sede__num { font: 300 clamp(4rem, 8vw, 5.5rem)/.85 var(--serif); color: var(--ladrillo); }
.sede__resto { font: 500 1.05rem/1.45 var(--sans); }
.sede__resto small { font-weight: 400; color: var(--suave); font-size: .9rem; }
.sede__num--pend { color: var(--linea); }
.sede__lugar { margin-bottom: 12px; }
.sede__det { color: var(--suave); }
.sede__acc { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; color: var(--tinta); }

/* ---------------------------------------------------------------- anfitrión */
.anfitrion__grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: clamp(40px, 7vw, 110px); align-items: center; }
.arco-foto--grande { max-width: 288px; justify-self: center; background: linear-gradient(170deg, var(--tinta), var(--tinta-2)); }
.arco-foto--grande::after { border-color: var(--tinta); }
.arco-foto__logo { width: 58%; --logo-alfiz: var(--arena); --logo-fondo: var(--tinta); }
.anfitrion__txt { max-width: 620px; color: var(--suave); }
.anfitrion__txt .titulo { color: var(--texto); }
.firma { margin-top: 30px; display: flex; flex-direction: column; color: var(--texto); }
.firma span { font: italic 400 1.9rem/1.1 var(--serif); }
.firma small { font: 600 .78rem/1.6 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--ladrillo); }

/* ---------------------------------------------------------------- inscripción */
.inscripcion {
  background:
    radial-gradient(50% 70% at 0% 0%, rgba(61, 108, 140, .35), transparent 70%),
    radial-gradient(40% 50% at 100% 100%, rgba(180, 83, 42, .25), transparent 70%),
    var(--tinta);
  color: var(--papel);
}
.inscripcion .rotulo { color: var(--arena); }
.inscripcion .titulo { color: var(--papel); }
.inscripcion__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 6vw, 90px); align-items: center; }
.inscripcion__txt > p { opacity: .82; max-width: 44ch; }
.inscripcion__lista { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 12px; }
.inscripcion__lista li { padding-left: 26px; position: relative; opacity: .9; }
.inscripcion__lista li::before { content: ""; position: absolute; left: 0; top: .55em; width: 12px; height: 12px; border-radius: 50%; border: 2px solid var(--arena); }
.inscripcion__lista b { color: var(--arena); font-weight: 600; }

.tarjeta-form { background: var(--papel-2); color: var(--texto); border-radius: 22px; padding: clamp(26px, 4vw, 44px); box-shadow: 0 40px 80px -40px rgba(0, 0, 0, .6); position: relative; }
.tarjeta-form::before { content: ""; position: absolute; inset: 10px; border: 1px solid var(--linea); border-radius: 16px; pointer-events: none; }
#formRegistro { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 18px 16px; }
.campo { display: flex; flex-direction: column; gap: 7px; }
.campo--ancho, #formRegistro .btn, .form-msg, .form-legal { grid-column: 1 / -1; }
.campo label { font: 600 .82rem/1 var(--sans); letter-spacing: .04em; color: var(--suave); }
.campo input {
  font: 500 1.05rem/1.3 var(--sans); color: var(--texto);
  padding: 14px 16px; border-radius: 12px; border: 1.5px solid var(--linea); background: #fff;
  transition: border-color .2s, box-shadow .2s; width: 100%; min-width: 0;
}
.campo input:focus { outline: none; border-color: var(--ladrillo); box-shadow: 0 0 0 4px rgba(180, 83, 42, .14); }
.campo.con-error input { border-color: #b3261e; }
.campo__err { font-size: .82rem; color: #b3261e; min-height: 0; }
.campo__err:empty { display: none; }
.elegir { border: 0; padding: 0; margin: 4px 0 0; min-width: 0; }
.elegir legend { font: 600 .82rem/1 var(--sans); letter-spacing: .04em; color: var(--suave); padding: 0; margin-bottom: 9px; }
.elegir__ops { display: grid; grid-template-columns: 1fr; gap: 8px; }
.opcion { position: relative; display: flex; cursor: pointer; }
.opcion input { position: absolute; opacity: 0; pointer-events: none; }
.opcion__caja { flex: 1; display: flex; flex-direction: column; gap: 2px; padding: 13px 16px 13px 42px; border: 1.5px solid var(--linea); border-radius: 12px; background: #fff; position: relative; transition: border-color .2s, background .2s, box-shadow .2s; }
.opcion__caja::before { content: ""; position: absolute; left: 15px; top: 50%; margin-top: -8px; width: 16px; height: 16px; border-radius: 50%; border: 1.5px solid var(--linea); background: #fff; transition: border .2s, box-shadow .2s; }
.opcion__ciudad { font: 600 .98rem/1.2 var(--sans); color: var(--texto); }
.opcion__cuando { font-size: .85rem; line-height: 1.3; color: var(--suave); font-variant-numeric: tabular-nums; }
.opcion:hover .opcion__caja { border-color: var(--arena); }
.opcion input:checked + .opcion__caja { border-color: var(--ladrillo); background: #fdf3ec; box-shadow: 0 0 0 3px rgba(180, 83, 42, .12); }
.opcion input:checked + .opcion__caja::before { border: 5px solid var(--ladrillo); }
.opcion input:focus-visible + .opcion__caja { outline: 2px solid var(--ladrillo); outline-offset: 2px; }
.elegir.con-error .opcion__caja { border-color: #b3261e; }
.trampa { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
#formRegistro .btn { margin-top: 6px; position: relative; }
.btn__spin { display: none; width: 18px; height: 18px; border-radius: 50%; border: 2px solid rgba(255, 255, 255, .35); border-top-color: #fff; animation: girar .8s linear infinite; }
.enviando .btn__spin { display: block; }
.enviando .btn { pointer-events: none; opacity: .85; }
@keyframes girar { to { transform: rotate(360deg); } }
.form-msg { margin: 0; font-size: .92rem; color: #b3261e; }
.form-msg:empty { display: none; }
.form-legal { margin: 0; font-size: .8rem; color: var(--suave); text-align: center; }

.form-ok { position: relative; text-align: center; padding: 16px 6px; }
.form-ok h3 { font-size: 2rem; margin: 18px 0 12px; }
.form-ok p { color: var(--suave); }
.form-ok__icono { width: 72px; height: 72px; margin: 0 auto; fill: none; stroke: var(--ladrillo); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.form-ok__icono circle { stroke-dasharray: 151; stroke-dashoffset: 151; animation: trazo .7s var(--ease) forwards; }
.form-ok__icono path { stroke-dasharray: 40; stroke-dashoffset: 40; animation: trazo .45s .55s var(--ease) forwards; }
@keyframes trazo { to { stroke-dashoffset: 0; } }
.form-ok__acc { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 22px; color: var(--tinta); }

/* ---------------------------------------------------------------- pie */
.pie { background: var(--tinta-2); color: rgba(243, 236, 224, .8); padding: 44px 0; font-size: .92rem; }
.pie__grid { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 22px; }
.pie__marca { display: flex; align-items: center; gap: 14px; }
.pie__ciudades { padding-left: 16px; margin-left: 4px; border-left: 1px solid rgba(243, 236, 224, .2); font-size: .85rem; line-height: 1.5; }
.pie__logo { width: 38px; --logo-alfiz: var(--arena); --logo-fondo: var(--tinta-2); }
.pie__links { display: flex; flex-wrap: wrap; gap: 22px; }
.pie__links a { text-decoration: none; }
.pie__links a:hover { color: var(--arena); }
.pie__copy { margin: 0; opacity: .6; }

/* ---------------------------------------------------------------- tapa real */
.hero:has(.hero__arte--tapa) .hero__in { grid-template-columns: 1fr 1.05fr; }
.hero:has(.hero__arte--tapa) .hero__titulo { font-size: clamp(3rem, 7.4vw, 6.4rem); }
.hero__arte--tapa { width: 100%; max-width: 640px; justify-self: end; }
.libro3d-env { position: relative; perspective: 1600px; animation: flotar 8s ease-in-out infinite; }
.libro3d-env::before { content: ""; position: absolute; inset: -12% -8%; z-index: -1; background: radial-gradient(closest-side, rgba(231, 176, 138, .28), transparent 75%); filter: blur(8px); }
.libro3d {
  --rx: 3deg; --ry: -13deg;
  position: relative; display: block; width: 100%; padding: 0; border: 0; background: none; color: inherit; cursor: zoom-in;
  border-radius: 3px 10px 10px 3px;
  transform: rotateX(var(--rx)) rotateY(var(--ry)); transform-style: preserve-3d;
  transition: transform .7s var(--ease);
}
.libro3d img { position: relative; display: block; width: 100%; height: auto; border-radius: inherit; box-shadow: 0 50px 80px -36px rgba(0, 0, 0, .75), 0 18px 30px -18px rgba(0, 0, 0, .55); }
.libro3d::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4.5%; z-index: 1; border-radius: 3px 0 0 3px; pointer-events: none; background: linear-gradient(90deg, rgba(0, 0, 0, .38), rgba(255, 255, 255, .22) 45%, rgba(0, 0, 0, .06) 70%, transparent); }
.libro3d::after { content: ""; position: absolute; top: 1.6%; bottom: 1.6%; right: -9px; width: 12px; z-index: -1; border-radius: 0 4px 4px 0; background: repeating-linear-gradient(90deg, #f6f1e7 0 1px, #d8cfbf 1px 2px); box-shadow: 4px 6px 14px rgba(0, 0, 0, .35); }
.libro3d__ampliar { position: absolute; right: 14px; bottom: 14px; z-index: 2; width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; background: rgba(14, 22, 40, .7); color: var(--papel); opacity: 0; transform: scale(.85); transition: opacity .3s, transform .3s var(--ease); }
.libro3d__ampliar svg { width: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.libro3d:hover .libro3d__ampliar, .libro3d:focus-visible .libro3d__ampliar { opacity: 1; transform: none; }
.libro3d--foto { --rx: 2deg; --ry: 8deg; cursor: default; border-radius: 14px; }
.libro__grid:has(.libro__foto--hojas) { grid-template-columns: 1fr 1fr; align-items: start; gap: clamp(36px, 6vw, 80px); }
.libro__foto--hojas { position: sticky; top: 120px; justify-items: stretch; }
.libro__foto--hojas figcaption { text-align: center; }
.libro3d-env--suave { animation-duration: 10s; }
.libro3d-env--suave::before { inset: -6% -4%; background: radial-gradient(closest-side, rgba(180, 83, 42, .18), transparent 75%); }
.libro3d--foto::before, .libro3d--foto::after { content: none; }
.libro3d--foto img { border-radius: 14px; box-shadow: 0 50px 90px -40px rgba(0, 0, 0, .8), 0 20px 36px -20px rgba(0, 0, 0, .55), 0 0 0 1px rgba(255, 255, 255, .06); }
.arco-foto--libro { cursor: default; }
.arco-foto--libro:hover img { transform: scale(1.7); }
.hero__tapa-rot { margin: 26px 0 0; font-size: .82rem; opacity: .72; text-align: center; }
.hero__tapa-rot span { font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--arena); margin-right: 8px; }

.libro__foto { margin: 0; display: grid; gap: 16px; justify-items: center; }
.arco-foto--libro { max-width: 380px; padding: 0; border: 0; cursor: zoom-in; background: var(--tinta); }
.arco-foto__rec { position: absolute; inset: 0; overflow: hidden; border-radius: inherit; }
.arco-foto--libro img { transform: scale(1.7); transform-origin: 46% 36%; transition: transform 1.4s var(--ease); }
.arco-foto--libro:hover img { transform: scale(1.8); }
.arco-foto--libro::after { border-color: var(--rio); }
.libro__foto figcaption { font: italic 400 .95rem/1.4 var(--serif); color: var(--suave); }

.visor { padding: 0; border: 0; background: transparent; max-width: min(1200px, 94vw); max-height: 94vh; overflow: visible; }
.visor::backdrop { background: rgba(14, 22, 40, .88); backdrop-filter: blur(4px); }
.visor img { display: block; width: auto; max-width: 100%; max-height: 90vh; height: auto; border-radius: 6px; box-shadow: 0 40px 90px rgba(0, 0, 0, .6); }
.visor[open] img { animation: abrir .45s var(--ease); }
.visor__cerrar { position: absolute; top: -16px; right: -16px; width: 42px; height: 42px; border-radius: 50%; border: 0; background: var(--papel); color: var(--tinta); font-size: 1rem; cursor: pointer; box-shadow: var(--sombra); }
@keyframes abrir { from { opacity: 0; transform: scale(.94); } }

@media (max-width: 960px) {
  .hero:has(.hero__arte--tapa) .hero__in { grid-template-columns: 1fr; }
  .hero__arte.hero__arte--tapa { order: -1; width: 100%; max-width: 560px; justify-self: center; margin: 0 0 18px; }
  .libro3d { --ry: -6deg; --rx: 2deg; } .libro3d--foto { --ry: 4deg; --rx: 1deg; }
  .libro__grid:has(.libro__foto--hojas) { grid-template-columns: 1fr; }
  .libro__foto--hojas { position: static; }
}
@media (max-width: 560px) {
  .hero__arte.hero__arte--tapa { width: 100%; }
  .visor__cerrar { top: 8px; right: 8px; }
  .libro3d::after { right: -6px; width: 8px; }
}

/* ---------------------------------------------------------------- revelado */
.js .rev { opacity: 0; transform: translateY(22px); transition: opacity .9s var(--ease), transform .9s var(--ease); transition-delay: var(--d, 0ms); }
.js .rev.vis { opacity: 1; transform: none; }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 960px) {
  .hero { padding: 104px 0 150px; min-height: auto; }
  .hero__in { grid-template-columns: 1fr; }
  .hero__arte { order: -1; width: min(58%, 260px); justify-self: start; margin-left: 4px; }
  .hero__orilla { display: none; }
  .libro__grid, .anfitrion__grid, .inscripcion__grid { grid-template-columns: 1fr; }
  .libro__tapa { order: -1; }
  .tapa { width: min(70%, 280px); }
  .arco-foto--grande { max-width: 208px; justify-self: start; }
}
@media (max-width: 820px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: fixed; inset: 0; z-index: -1; flex-direction: column; justify-content: center; gap: 26px;
    background: var(--tinta-2); font-size: 1.4rem;
    opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s;
  }
  .nav__links a:not(.btn) { font: 400 1.9rem/1 var(--serif); }
  .nav.abierto .nav__links { opacity: 1; visibility: visible; }
  .sedes__grid { grid-template-columns: 1fr; padding-top: 0; }
  .sedes__ruta { display: none; }
}
@media (max-width: 560px) {
  body { font-size: 1rem; }
  .hero__arte { width: 150px; }
  .hero__fechas { grid-template-columns: 1fr; }
  .hero__cta .btn { flex: 1 1 100%; }
  .cuenta__nums span { min-width: 0; flex: 1; }
  .autor { grid-template-columns: 110px 1fr; gap: 20px; }
  .autor--sin-foto { grid-template-columns: 1fr; padding-left: 18px; }
  .autor h3 { font-size: 1.5rem; }
  .arco-foto__ini { font-size: 2.4rem; }
  #formRegistro { grid-template-columns: 1fr; }
  .pie__grid { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .js .rev { opacity: 1; transform: none; }
}

/* foto del libro con hojas: más protagonismo en el celular */
@media (max-width: 600px) {
  .libro__foto--hojas { margin-inline: calc(-1 * var(--gutter) + 6px); gap: 12px; margin-bottom: 8px; }
  .libro__foto--hojas .libro3d--foto { --ry: 0deg; --rx: 0deg; border-radius: 12px; }
  .libro__foto--hojas .libro3d--foto img { border-radius: 12px; box-shadow: 0 28px 50px -24px rgba(14, 22, 40, .55); }
  .libro__foto--hojas .libro3d-env { animation: none; width: 100%; }
  .libro__foto--hojas .libro3d-env::before { content: none; }
  .libro__grid:has(.libro__foto--hojas) { gap: 30px; }
}