/* KAIVOS — hoja de estilos
   Layout: editorial de una columna ancha con riel izquierdo para el nombre de cada sección;
   filetes finos en lugar de tarjetas; dos bandas azules (Quiénes somos y Propuesta 360°). */
:root{
  color-scheme: light;
  --navy:#1A2945;        /* marca */
  --navy-deep:#0F1A30;
  --gold:#B98833;        /* marca: filetes, numerales y botón de envío */
  --gold-text:#85601C;   /* dorado oscurecido para texto legible sobre claro */
  --gold-soft:#E3C58A;   /* dorado claro para texto sobre azul */
  --paper:#F5F6F8;       /* fondo, gris con sesgo al azul */
  --surface:#FFFFFF;
  --muted:#525D75;
  --rule:rgba(26,41,69,.16);
  --serif:"Instrument Serif","Iowan Old Style",Georgia,serif;
  --sans:"Instrument Sans","Helvetica Neue",Arial,sans-serif;
  --gutter:clamp(20px,5vw,72px);
  --max:1240px;

  /* FONDOS FOTOGRÁFICOS ORIGINALES (pendientes de archivo, ver docs/IMAGENES.md).
     Al copiar los archivos con estos nombres, los fondos aparecen sin tocar código. */
  --bg-inicio:url("../assets/img/inicio-fondo.jpg");
  --bg-quienes:url("../assets/img/quienes-somos-fondo.jpg");
  --bg-contacto:url("../assets/img/contacto-fondo.jpg");
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--navy);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,p,ol,ul,blockquote,figure{margin:0;padding:0}
ol,ul{list-style:none}
h1,h2,h3{font-family:var(--serif);font-weight:400;text-wrap:balance;letter-spacing:-.01em}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:12px;z-index:100;background:var(--navy);color:#fff;padding:10px 14px}

/* Encabezado */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule);transition:box-shadow .25s}
.top.scrolled{box-shadow:0 6px 24px -18px rgba(15,26,48,.55)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex:none}
.brand img{height:52px;width:52px;object-fit:contain}
.brand span{font-weight:500;font-size:15px;letter-spacing:.34em}
.nav{display:flex;align-items:center;gap:clamp(14px,1.9vw,28px)}
.nav a{font-size:14.5px;text-decoration:none;padding:12px 0;white-space:nowrap;background:linear-gradient(var(--gold),var(--gold)) left calc(100% - 6px)/0 1px no-repeat;transition:background-size .25s}
.nav a:hover,.nav a[aria-current="true"]{background-size:100% 1px}
.nav a.cta{border:1px solid var(--navy);padding:8px 16px;border-radius:2px;background:none;transition:background-color .2s,color .2s}
.nav a.cta:hover,.nav a.cta[aria-current="true"]{background:var(--navy);color:#fff}
.menu-btn{display:none;background:none;border:1px solid var(--rule);border-radius:2px;min-width:44px;height:44px;padding:0 14px;font:500 15px var(--sans);color:var(--navy);cursor:pointer}

/* 1. Inicio: la fotografía de portada va de fondo, a la derecha, con velo blanco para el texto */
.hero{background-color:var(--surface);background-image:linear-gradient(90deg,#fff 0%,rgba(255,255,255,.94) 38%,rgba(255,255,255,.72) 70%,rgba(255,255,255,.55) 100%),var(--bg-inicio);background-size:cover;background-position:center right;border-bottom:1px solid var(--rule)}
.hero .wrap{padding-top:clamp(64px,10vw,150px);padding-bottom:clamp(56px,8vw,120px)}
.hero-text{max-width:860px}
.hero h1{font-size:clamp(2.35rem,5.4vw,4.5rem);line-height:1.06}
.hero h1 em{font-style:italic;color:var(--gold-text)}
.hero .lede{font-family:var(--serif);font-size:clamp(1.15rem,1.7vw,1.4rem);line-height:1.4;margin-top:32px}
.hero .sub{color:var(--muted);max-width:52ch;margin-top:14px}
.actions{display:flex;flex-wrap:wrap;align-items:center;gap:28px;margin-top:40px}
.btn{display:inline-flex;align-items:center;gap:12px;min-height:50px;padding:0 26px;background:var(--navy);color:#fff;text-decoration:none;font-weight:500;font-size:16px;border:0;border-radius:2px;cursor:pointer;font-family:var(--sans);transition:background-color .2s}
.btn:hover{background:var(--navy-deep)}
.btn svg{width:14px;height:14px;transition:transform .25s}
.btn:hover svg{transform:translateY(3px)}
.btn.gold{background:var(--gold-text)}
.btn.gold:hover{background:#6E4F15}
.btn[disabled]{opacity:.6;cursor:progress}
.text-link{font-weight:500;text-decoration:underline;text-decoration-color:var(--gold);text-underline-offset:6px;text-decoration-thickness:1px;padding:12px 0}
.text-link:hover{text-decoration-thickness:2px}

/* Secciones */
section{padding:clamp(64px,9vw,128px) 0}
section.white{background:var(--surface);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.sec{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,10fr);gap:clamp(24px,4vw,56px)}
.rail{font-size:15px;font-weight:500;color:var(--gold-text)}
.rail::before{content:"";display:block;width:40px;height:2px;background:var(--gold);margin-bottom:14px}
.sec h2{font-size:clamp(1.8rem,3.3vw,2.85rem);line-height:1.12;max-width:26ch}
.sec .intro{color:var(--muted);max-width:60ch;margin-top:18px;font-size:1.06rem}
.block{margin-top:clamp(36px,5vw,64px)}
.pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 clamp(28px,4vw,64px)}
.pair > div{border-top:1px solid var(--rule);padding:22px 0 8px}
h3{font-size:1.35rem;line-height:1.25}
.pair p,.note p{color:var(--muted);margin-top:10px;max-width:58ch}
.note{border-top:1px solid var(--rule);padding-top:22px;margin-top:28px}
blockquote{font-family:var(--serif);font-style:italic;font-size:clamp(1.35rem,2.5vw,2rem);line-height:1.3;border-left:2px solid var(--gold);padding-left:clamp(18px,2.5vw,32px);max-width:32ch}

/* Fotografías */
.photo{overflow:hidden;border-radius:2px;background:#DDE1E8}
.photo img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s cubic-bezier(.2,.6,.2,1)}
.photo:hover img{transform:scale(1.025)}
.photo img.keep-top{object-position:center 15%}
.photo.wide{aspect-ratio:21/9}
.split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:clamp(28px,4vw,64px);align-items:stretch}
.split .photo{min-height:280px}
.split.even{grid-template-columns:repeat(2,minmax(0,1fr));align-items:center}
.split.even .photo{aspect-ratio:3/2}

/* Bandas azules */
.band{background:var(--navy);color:#fff}
.band .rail{color:var(--gold-soft)}
.band .pair > div,.band .note{border-top-color:rgba(255,255,255,.22)}
.band .pair p,.band .note p{color:#D5DBE7}
/* 2. Quiénes somos: globo terráqueo completo a la derecha, en segundo plano; el texto ocupa la mitad izquierda */
.earth{background-color:#0F1A30;background-image:linear-gradient(90deg,#0F1A30 0%,#0F1A30 46%,rgba(15,26,48,.72) 62%,rgba(15,26,48,0) 80%),var(--bg-quienes);background-repeat:no-repeat;background-size:100% 100%,auto min(90%,46vw);background-position:0 0,right max(3vw,calc((100vw - var(--max))/2)) center}
.earth .sec > div{max-width:540px}
.earth .pair{grid-template-columns:1fr}
.earth .pair > div{padding-bottom:22px}
.statement{font-size:clamp(1.5rem,2.7vw,2.3rem) !important;line-height:1.22 !important;max-width:none !important}
.principles{margin-top:clamp(36px,5vw,60px);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 clamp(28px,4vw,64px)}
.principles li{border-top:1px solid rgba(255,255,255,.22);padding:20px 0;color:#DDE2EC}

/* 4. Metodología */
.phases{margin-top:clamp(36px,5vw,64px);border-bottom:1px solid var(--rule)}
.phases li{display:grid;grid-template-columns:72px minmax(0,3fr) minmax(0,5fr) minmax(0,4fr);gap:8px clamp(16px,3vw,40px);align-items:baseline;border-top:1px solid var(--rule);padding:26px 0;transition:background-color .25s}
.phases li:hover{background:var(--paper)}
.phases .n{font-family:var(--serif);font-size:1.6rem;color:var(--gold-text);font-variant-numeric:tabular-nums;padding-left:4px}
.phases p{color:var(--muted)}
.phases .out{color:var(--navy);font-weight:500;font-size:15.5px;display:flex;gap:10px}
.phases .out::before{content:"→";color:var(--gold-text)}
.cycle{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 18px;margin-top:28px}
.cycle span{color:var(--muted);font-size:15px;margin-right:8px}
.cycle b{font-family:var(--serif);font-weight:400;font-size:1.25rem}
.cycle i{font-style:normal;color:var(--gold-text)}

/* 5. Soluciones */
.index{border-bottom:1px solid var(--rule)}
.index li{border-top:1px solid var(--rule);padding:22px 0}
.index h3{font-size:clamp(1.3rem,1.9vw,1.6rem)}
.index p{color:var(--muted);margin-top:6px}

/* 6. Alcance global */
.regions{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0 clamp(16px,2.5vw,32px);margin-top:clamp(28px,4vw,48px)}
.regions li{border-top:2px solid var(--gold);padding-top:16px;font-family:var(--serif);font-size:clamp(1.25rem,2vw,1.6rem)}

/* 9. Contacto: fotografía de fondo bajo un velo blanco, para que el texto y el formulario se lean */
section.contact-bg{background-image:linear-gradient(90deg,rgba(255,255,255,.95) 0%,rgba(255,255,255,.9) 55%,rgba(255,255,255,.82) 100%),var(--bg-contacto);background-size:cover;background-position:center}
.contact-bg input,.contact-bg textarea{background:rgba(255,255,255,.92)}
.contact-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:clamp(32px,5vw,80px)}
.mail{display:inline-block;font-family:var(--serif);font-size:clamp(1.4rem,2.4vw,1.9rem);margin-top:28px;text-decoration:underline;text-decoration-color:var(--gold);text-underline-offset:8px;text-decoration-thickness:1px}
form{display:grid;gap:20px}
label{display:grid;gap:8px;font-size:15px;font-weight:500}
label small{font-weight:400;color:var(--muted);font-size:inherit}
input,textarea{font:400 17px/1.4 var(--sans);color:var(--navy);background:var(--paper);border:1px solid var(--rule);border-radius:2px;padding:13px 14px;width:100%}
input:focus,textarea:focus{outline:2px solid var(--gold);outline-offset:1px;background:#fff}
input[aria-invalid="true"],textarea[aria-invalid="true"]{border-color:#A3301F}
textarea{min-height:150px;resize:vertical}
.err{font-weight:400;font-size:14.5px;color:#A3301F;min-height:0}
.err:empty{display:none}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;gap:16px 24px}
#form-status{color:var(--muted);font-size:15px;max-width:44ch}
#form-status.bad{color:#A3301F}
.sent{border-top:2px solid var(--gold);padding-top:22px}
.sent h3{font-size:1.6rem}
.sent p{color:var(--muted);margin-top:10px;max-width:46ch}

/* Pie */
footer{background:var(--navy-deep);color:#C9D0DD;font-size:15px}
footer .wrap{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:32px clamp(32px,5vw,80px);padding-top:56px;padding-bottom:56px}
.foot-brand{display:grid;gap:10px;align-content:start;justify-items:start}
footer strong{color:#fff;font-weight:500;letter-spacing:.34em}
footer a{color:#fff;text-decoration:none;padding:6px 0}
.foot-brand a{text-decoration:underline;text-decoration-color:var(--gold);text-underline-offset:5px}
.foot-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px 24px;align-content:start}
.foot-nav a:hover{text-decoration:underline;text-decoration-color:var(--gold);text-underline-offset:5px}

/* Aparición sutil: el estado de reposo es visible; solo se anima si hay JS y no se pidió reducir movimiento */
.js .reveal{opacity:.35;transform:translateY(14px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.6,.2,1)}
.js .reveal.in{opacity:1;transform:none}

@media (max-width:1180px){
  .menu-btn{display:inline-flex;align-items:center}
  .nav{display:none;position:absolute;left:0;right:0;top:68px;background:#fff;border-bottom:1px solid var(--rule);flex-direction:column;align-items:stretch;gap:0;padding:8px var(--gutter) 24px;max-height:calc(100vh - 68px);overflow-y:auto;box-shadow:0 24px 40px -28px rgba(15,26,48,.5)}
  .nav.open{display:flex}
  .nav a{padding:15px 0;border-bottom:1px solid var(--rule);font-size:17px;background:none}
  .nav a[aria-current="true"]{color:var(--gold-text)}
  .nav a.cta{margin-top:16px;text-align:center;border:1px solid var(--navy);padding:14px}
}
@media (max-width:900px){
  .sec{grid-template-columns:1fr;gap:20px}
  .split,.split.even{grid-template-columns:1fr}
  .split .photo,.split.even .photo{aspect-ratio:16/10;min-height:0}
  .phases li{grid-template-columns:48px minmax(0,1fr)}
  .phases li > *:not(.n){grid-column:2}
  .phases .n{grid-row:1}
  .contact-grid{grid-template-columns:1fr}
  footer .wrap{grid-template-columns:1fr}
  .foot-nav a,.foot-brand a{padding:11px 0}
  .hero{background-image:linear-gradient(180deg,rgba(255,255,255,.95) 0%,rgba(255,255,255,.86) 100%),var(--bg-inicio)}
  .earth{background-image:var(--bg-quienes);background-size:min(84vw,460px) auto;background-position:center bottom 28px;padding-bottom:calc(min(84vw,460px) + 56px)}
  .earth .sec > div{max-width:none}
}
@media (max-width:640px){
  body{font-size:16.5px}
  .pair,.principles{grid-template-columns:1fr}
  .pair > div{padding-bottom:24px}
  .photo.wide{aspect-ratio:2/1}
  .regions{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:22px}
  .foot-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-nav a,.foot-brand a{padding:11px 0}
  .brand{min-height:44px}
  .actions{gap:16px 28px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  .photo img,.btn svg{transition:none}
}

/* ================= Selector de idioma (globo) ================= */
.nav{margin-left:auto;gap:clamp(14px,1.6vw,24px)}
.lang{position:relative;flex:0 0 auto;margin:0 -12px 0 -10px}
.lang-btn{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;padding:0;background:none;border:0;border-radius:2px;color:var(--navy);cursor:pointer;transition:color .2s}
.lang-btn svg{width:20px;height:20px}
.lang-btn:hover,.lang.open .lang-btn{color:var(--gold-text)}
.lang-menu{display:none;position:absolute;right:0;top:calc(100% + 12px);min-width:164px;padding:6px 0;background:#fff;border:1px solid var(--rule);border-radius:2px;box-shadow:0 24px 40px -28px rgba(15,26,48,.5);z-index:60}
.lang.open .lang-menu,html:not(.js) .lang:focus-within .lang-menu{display:block}
.lang-menu a{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:11px 16px;font-size:15px;line-height:1.4;text-decoration:none;white-space:nowrap;font-family:"Instrument Sans","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Noto Sans CJK SC",sans-serif}
.lang-menu a:hover{background:var(--paper)}
.lang-menu a[aria-current="page"]{color:var(--gold-text);font-weight:500}
.lang-menu a[aria-current="page"]::after{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold)}
@media (max-width:1180px){
  .top .wrap{gap:8px}
  .lang{margin:0 0 0 auto}
}

/* ================= Chino (zh-Hans): tipografía y medidas ================= */
html:lang(zh){
  --serif:"Instrument Serif","Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC","Noto Serif SC","PingFang SC","Microsoft YaHei",serif;
  --sans:"Instrument Sans","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Noto Sans CJK SC",sans-serif;
}
html:lang(zh) body{line-height:1.8;line-break:strict}
html:lang(zh) h1,html:lang(zh) h2,html:lang(zh) h3{letter-spacing:0}
html:lang(zh) em,html:lang(zh) blockquote{font-style:normal}
html:lang(zh) .hero h1{font-size:clamp(2.05rem,4.7vw,3.9rem);line-height:1.22}
html:lang(zh) .hero .lede{line-height:1.6}
html:lang(zh) .hero .sub{max-width:30em}
html:lang(zh) .sec h2{font-size:clamp(1.6rem,2.9vw,2.5rem);line-height:1.34;max-width:19em}
html:lang(zh) .statement{line-height:1.45!important}
html:lang(zh) .sec .intro{max-width:34em}
html:lang(zh) .pair p,html:lang(zh) .note p{max-width:32em}
html:lang(zh) blockquote{line-height:1.55;max-width:21em}
html:lang(zh) h3{line-height:1.4}
html:lang(zh) #form-status{max-width:26em}
html:lang(zh) .sent p{max-width:26em}