/* ==========================================================================
   Concurso Fotográfico "Las Postales de Ñuble y Biobío"
   Paleta y estilo inspirados en el afiche (azul noche + atardecer + amarillo).
   ========================================================================== */

:root{
  --navy-950:#081027;
  --navy-900:#0b1837;
  --navy-800:#0f2149;
  --navy-700:#16305f;
  --navy-600:#1e3d77;
  --gold:#f4c020;
  --gold-soft:#ffd75e;
  --red:#e2001a;
  --white:#ffffff;
  --ink:#132444;
  --muted:#5c6a86;
  --linea:#e6e9f0;
  --sombra:0 20px 55px rgba(8,16,39,.30);
  --disp:"Anton","Archivo Black",Impact,system-ui,sans-serif;
  --sans:"Open Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:var(--sans);color:var(--ink);background:#fff;line-height:1.6;}
img{max-width:100%;display:block;}
a{color:inherit;}
.wrap{width:min(100% - 40px,1120px);margin-inline:auto;}

/* ---------- HERO ---------- */
.hero{
  position:relative;color:var(--white);overflow:hidden;
  /* Suelta la foto real del afiche en assets/img/hero.jpg y aparecerá aquí.
     Si el archivo no existe, se muestra igual el degradado azul noche. */
  --imagen-hero:url('../img/hero.jpg');
  background:
    linear-gradient(180deg, rgba(8,16,39,.86) 0%, rgba(11,24,55,.72) 42%, rgba(15,33,73,.55) 68%, rgba(30,61,119,.40) 100%),
    radial-gradient(120% 90% at 85% 12%, rgba(255,178,84,.35) 0%, rgba(255,120,60,.12) 30%, rgba(11,24,55,0) 60%),
    var(--imagen-hero, none),
    linear-gradient(160deg,#0a1430 0%,#0d1c40 45%,#16305f 100%);
  background-size:cover, cover, cover, cover;
  background-position:center, center, center right, center;
  background-repeat:no-repeat;
}
/* Silueta de montañas al pie del hero (evoca el paisaje). */
.hero-scenery{position:absolute;left:0;right:0;bottom:-1px;width:100%;height:auto;display:block;pointer-events:none;opacity:.9;}
.hero-inner{position:relative;z-index:2;padding:52px 0 120px;}

.badge-concurso{
  display:inline-flex;align-items:center;gap:12px;background:var(--navy-600);
  color:#fff;font-weight:800;letter-spacing:.14em;text-transform:uppercase;
  font-size:clamp(.8rem,2.4vw,1.05rem);padding:12px 20px;border-radius:8px;
}
.badge-concurso svg{width:30px;height:30px;flex:0 0 auto;color:var(--gold);}

.hero-title{
  font-family:var(--disp);font-weight:400;line-height:1.06;margin:22px 0 0;
  font-size:clamp(2.6rem,10vw,6rem);letter-spacing:.015em;text-transform:uppercase;
  text-shadow:0 6px 30px rgba(0,0,0,.45);word-break:break-word;
}
.hero-title br{line-height:1.2;}
.hero-title .l2{color:var(--gold);}
.hero-rule{width:120px;height:6px;background:var(--gold);border-radius:3px;margin:22px 0 26px;}

.hero-lede{
  font-size:clamp(1.15rem,3.4vw,1.8rem);font-weight:600;max-width:22ch;line-height:1.25;margin:0 0 34px;
}
.hero-lede b{color:var(--gold);font-weight:800;}

/* Fechas */
.fechas{display:flex;flex-direction:column;gap:20px;margin:0 0 30px;}
.fecha{display:flex;align-items:center;gap:18px;}
.fecha-ic{width:56px;height:56px;flex:0 0 auto;border-radius:14px;background:var(--navy-600);display:grid;place-items:center;box-shadow:0 8px 20px rgba(0,0,0,.3);}
.fecha-ic svg{width:30px;height:30px;color:#fff;}
.fecha-tx small{display:block;text-transform:uppercase;letter-spacing:.12em;font-weight:800;font-size:.82rem;opacity:.92;}
.fecha-tx strong{display:block;font-size:clamp(1.2rem,4vw,1.7rem);font-weight:800;color:var(--gold);line-height:1.1;}

/* CTA */
.btn-cta{
  display:inline-flex;align-items:center;gap:14px;background:var(--gold);color:#1a1204;
  font-weight:800;text-transform:uppercase;letter-spacing:.04em;text-decoration:none;
  font-size:clamp(1rem,2.6vw,1.25rem);padding:16px 30px;border-radius:12px;
  box-shadow:0 12px 30px rgba(244,192,32,.35);transition:transform .15s,box-shadow .15s,background .2s;
}
.btn-cta:hover{transform:translateY(-2px);background:var(--gold-soft);box-shadow:0 16px 38px rgba(244,192,32,.45);}
.btn-cta svg{width:26px;height:26px;}

.hero-bases{margin:22px 0 0;font-size:1rem;opacity:.95;}
.hero-bases a{color:var(--gold);text-decoration:none;font-weight:700;}
.hero-bases a:hover{text-decoration:underline;}

.hero-claim{
  margin:40px 0 0;font-weight:800;line-height:1.05;font-size:clamp(1.5rem,5vw,2.4rem);
  position:relative;padding-left:20px;
}
.hero-claim::before,.hero-claim::after{content:"";position:absolute;width:22px;height:22px;border:4px solid var(--gold);}
.hero-claim::before{left:0;top:-6px;border-right:0;border-bottom:0;}
.hero-claim .amar{color:var(--gold);}

/* ---------- BASES ---------- */
.bases{background:#fff;padding:64px 0;}
.bases-head{text-align:center;max-width:760px;margin:0 auto 12px;}
.eyebrow{color:var(--red);font-weight:800;letter-spacing:.16em;text-transform:uppercase;font-size:.85rem;margin:0 0 10px;}
.bases-title{font-family:var(--disp);font-weight:400;text-transform:uppercase;color:var(--navy-800);
  font-size:clamp(1.8rem,6vw,3rem);line-height:1;margin:0 0 6px;}
.bases-sub{color:var(--muted);font-size:1.05rem;margin:0 0 8px;}

.intro{max-width:820px;margin:26px auto 40px;color:#26324c;font-size:1.08rem;}
.intro p{margin:0 0 14px;}

/* Franja de datos clave */
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:0 auto 48px;max-width:960px;}
.fact{background:linear-gradient(160deg,var(--navy-800),var(--navy-700));color:#fff;border-radius:16px;padding:22px 18px;text-align:center;box-shadow:var(--sombra);}
.fact b{display:block;font-family:var(--disp);font-size:2rem;color:var(--gold);line-height:1;margin-bottom:8px;font-weight:400;}
.fact span{font-size:.92rem;opacity:.92;}

/* Secciones numeradas */
.seccion{max-width:820px;margin:0 auto;padding:26px 0;border-top:1px solid var(--linea);}
.seccion:first-of-type{border-top:0;}
.seccion h3{display:flex;align-items:center;gap:14px;color:var(--navy-800);font-size:clamp(1.15rem,3.5vw,1.5rem);margin:0 0 14px;}
.seccion h3 .num{flex:0 0 auto;width:40px;height:40px;border-radius:10px;background:var(--gold);color:#1a1204;
  font-weight:800;display:grid;place-items:center;font-size:1.05rem;}
.seccion p{margin:0 0 12px;color:#2c374f;}
.seccion ul{margin:0 0 14px;padding-left:0;list-style:none;}
.seccion ul li{position:relative;padding:6px 0 6px 26px;color:#2c374f;}
.seccion ul li::before{content:"";position:absolute;left:2px;top:14px;width:9px;height:9px;border-radius:50%;background:var(--red);}
.seccion ol{margin:0 0 14px;padding-left:22px;color:#2c374f;}
.seccion ol li{padding:4px 0;}
.dato{display:block;padding:4px 0;color:#2c374f;}
.dato b{color:var(--navy-800);}
.link-form{color:var(--red);font-weight:700;word-break:break-all;text-decoration:none;}
.link-form:hover{text-decoration:underline;}

.callout{background:#fff8e6;border:1px solid #f4d97a;border-left:6px solid var(--gold);border-radius:12px;padding:18px 20px;margin:14px 0;}
.callout strong{color:var(--navy-800);}

/* CTA final */
.cta-final{max-width:820px;margin:44px auto 0;text-align:center;background:linear-gradient(160deg,var(--navy-900),var(--navy-700));
  color:#fff;border-radius:20px;padding:44px 26px;box-shadow:var(--sombra);}
.cta-final h3{font-family:var(--disp);font-weight:400;text-transform:uppercase;font-size:clamp(1.5rem,5vw,2.2rem);margin:0 0 10px;}
.cta-final h3 span{color:var(--gold);}
.cta-final p{opacity:.9;margin:0 0 22px;}

/* ---------- FOOTER ---------- */
.organiza{background:#fff;border-top:1px solid var(--linea);padding:26px 0 34px;}
.organiza-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:22px 34px;}
.organiza-lb{font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-size:.9rem;}
.org-slot{display:inline-flex;align-items:center;justify-content:center;}
.org-slot--dark{background:var(--navy-800);padding:12px 20px;border-radius:8px;}
.logo-img{height:38px;width:auto;}
.dc-fb{color:#fff;font-weight:800;font-size:1.15rem;}
.footer-min{background:var(--navy-950);color:#9fb0cf;text-align:center;padding:16px;font-size:.85rem;}

/* ---------- Botón volver arriba ---------- */
.scroll-top{position:fixed;right:22px;bottom:22px;z-index:60;width:52px;height:52px;border:0;border-radius:50%;
  background:var(--gold);color:#1a1204;font-size:1.6rem;line-height:1;cursor:pointer;
  box-shadow:0 10px 26px rgba(0,0,0,.3);opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .25s,transform .25s,visibility .25s,background .2s;}
.scroll-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.scroll-top:hover{background:var(--gold-soft);}

/* ---------- Responsive ---------- */
@media(min-width:760px){
  .hero-inner{padding:70px 0 150px;}
  .fechas{flex-direction:row;gap:44px;}
}
@media(max-width:820px){
  .facts{grid-template-columns:repeat(2,1fr);}
}
@media(max-width:460px){
  .facts{grid-template-columns:1fr;}
  .fecha-ic{width:48px;height:48px;}
}