/* ============ TOKENS ============ */
:root{
  --bone:#EFEDE4;
  --bone-2:#E6E3D8;
  --ink:#14140F;
  --ink-2:#1E1E17;
  --green:#0E6B4A;
  --green-bright:#1FA277;
  --mute:#5D5C54;
  --mute-dark:#A9A89D;
  --rule:rgba(20,20,15,.17);
  --rule-dark:rgba(239,237,228,.16);
  --display:'Archivo',system-ui,sans-serif;
  --sans:'Geist',system-ui,-apple-system,sans-serif;
  --mono:'Geist Mono',ui-monospace,monospace;
  --wrap:1360px;
  --pad:clamp(20px,5vw,72px);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{
  -webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:clip;max-width:100%;scroll-padding-top:92px;
  color-scheme:light;                 /* evita que iOS/visores inviertan los colores */
  background:#EFEDE4;color:#14140F;
}
body{
  background:var(--bone);color:var(--ink);
  font-family:var(--sans);font-size:17px;line-height:1.55;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:clip;
}
img{width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--green);outline-offset:3px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-inline:var(--pad)}

/* ---- blindaje contra oscurecimiento automático de visores/navegadores ----
   Algunos visores (Archivos de iOS, modos de lectura, temas automáticos)
   sobrescriben el fondo de body pero no el de sus hijos. Por eso cada
   contenedor de primer nivel declara su fondo y su color de texto. */
main,header.nav,section,.portrait-band{background-color:var(--bone);color:var(--ink)}
.on-dark,footer,section.on-dark{background-color:var(--ink);color:var(--bone)}
header.nav{background-color:rgba(239,237,228,.92)}
.nav-dark,header.nav-dark{background-color:rgba(20,20,15,.92);color:var(--bone)}
@media(prefers-color-scheme:dark){
  html,body,main,section{background-color:var(--bone);color:var(--ink)}
  .on-dark,footer,section.on-dark{background-color:var(--ink);color:var(--bone)}
  .nav-dark,header.nav-dark{background-color:rgba(20,20,15,.92);color:var(--bone)}
}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ============ DISPLAY ============ */
.d1,.d2,.d3{
  font-family:var(--display);font-weight:700;
  font-variation-settings:'wdth' 108;
  text-transform:uppercase;line-height:.88;letter-spacing:-.045em;
}
.d1{font-size:clamp(3rem,8.6vw,8.2rem)}
.d2{font-size:clamp(2.3rem,6vw,5.2rem)}
.d3{font-size:clamp(1.75rem,3.6vw,3rem);letter-spacing:-.035em}
.green{color:var(--green)}
.on-dark .green{color:var(--green-bright)}

/* ============ ÍNDICE DE SECCIÓN ============ */
.idx{
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--mute);display:flex;align-items:baseline;gap:14px;
  padding-bottom:14px;margin-bottom:clamp(30px,5vw,58px);border-bottom:1px solid var(--rule);
}
.idx b{color:var(--green);font-weight:400}
.on-dark .idx{color:var(--mute-dark);border-bottom-color:var(--rule-dark)}
.on-dark .idx b{color:var(--green-bright)}

.bleed-top{position:relative}
.bleed-top::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:var(--rule)}
.on-dark.bleed-top::before{background:var(--rule-dark)}

/* ============ NAV ============ */
.nav{position:sticky;top:0;z-index:80;background:rgba(239,237,228,.9);backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid transparent;transition:border-color .25s}
.nav.stuck{border-bottom-color:var(--rule)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.brand{font-family:var(--display);font-weight:700;font-variation-settings:'wdth' 100;font-size:19px;text-transform:uppercase;letter-spacing:-.03em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:34px;font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase}
.nav-links a{color:var(--mute);transition:color .18s}
.nav-links a:hover,.nav-links a[aria-current]{color:var(--ink)}
.nav-yt{color:var(--ink)!important;border:1px solid var(--ink);padding:9px 15px;display:inline-flex;align-items:center;gap:8px;transition:background .18s,color .18s}
.nav-yt:hover{background:var(--ink);color:var(--bone)!important}
@media(max-width:860px){.nav-links a:not(.nav-yt){display:none}}

/* ============ BOTONES ============ */
.btn{
  display:inline-flex;align-items:center;gap:12px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;
  padding:17px 26px;border:1px solid var(--ink);transition:background .2s,color .2s,transform .2s;
}
.btn-solid{background:var(--ink);color:var(--bone)}
.btn-solid:hover{background:var(--green);border-color:var(--green);transform:translateY(-2px)}
.btn-line:hover{background:var(--ink);color:var(--bone);transform:translateY(-2px)}
.on-dark .btn{border-color:var(--bone)}
.on-dark .btn-solid{background:var(--bone);color:var(--ink)}
.on-dark .btn-solid:hover{background:var(--green-bright);border-color:var(--green-bright);color:var(--ink)}
.on-dark .btn-line{color:var(--bone)}
.on-dark .btn-line:hover{background:var(--bone);color:var(--ink)}
.actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:clamp(32px,4vw,48px)}

.on-dark{background:var(--ink);color:var(--bone)}
.on-dark p{color:#BDBCB2}

/* ============ REJILLA CON LÍNEAS ============ */
.grid-lines{display:grid;gap:1px;background:var(--rule)}
.on-dark .grid-lines{background:var(--rule-dark)}
.grid-lines>*{background:var(--bone)}
.on-dark .grid-lines>*{background:var(--ink)}

/* ============ CREDENCIALES ============ */
.creds{padding:0}
.creds ul{list-style:none;grid-template-columns:repeat(3,minmax(0,1fr))}
.creds li{padding:24px 26px 26px;line-height:1.5}
.creds li b{display:block;font-family:var(--display);font-weight:700;font-variation-settings:'wdth' 104;text-transform:uppercase;font-size:1.32rem;letter-spacing:-.03em;margin-bottom:7px}
.creds li span{font-family:var(--mono);font-size:10.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--mute);display:block;line-height:1.55}
@media(max-width:820px){.creds ul{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.creds ul{grid-template-columns:1fr}}

/* ============ PIE ============ */
footer{background:var(--ink);color:var(--bone);padding:clamp(52px,8vw,80px) 0 32px;overflow:hidden}
.foot-top{display:flex;justify-content:space-between;gap:36px;flex-wrap:wrap;align-items:flex-start;padding-bottom:clamp(46px,7vw,76px)}
.foot-nav{display:flex;flex-direction:column;gap:12px;font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase}
.foot-nav a{color:#BDBCB2;transition:color .18s}
.foot-nav a:hover{color:var(--green-bright)}
.foot-mark{
  font-family:var(--display);font-weight:700;font-variation-settings:'wdth' 112;
  font-size:clamp(3.4rem,14.5vw,12.6rem);line-height:.8;text-transform:uppercase;
  letter-spacing:-.055em;color:var(--ink-2);border-top:1px solid var(--rule-dark);
  padding-top:24px;white-space:nowrap;
}
.legal{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:#5A5951;margin-top:24px}

/* ============ FORM ============ */
.form{display:flex;flex-wrap:wrap;max-width:540px;border:1px solid var(--ink)}
.on-dark .form{border-color:var(--bone)}
.form input{flex:1;min-width:190px;font-family:var(--sans);font-size:16px;padding:18px 20px;background:transparent;border:0;color:inherit}
.form input::placeholder{color:var(--mute)}
.on-dark .form input::placeholder{color:var(--mute-dark)}
.form input:focus{outline:none;background:rgba(14,107,74,.07)}
.form button{font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;padding:18px 28px;border:0;background:var(--ink);color:var(--bone);cursor:pointer;transition:background .2s}
.form button:hover{background:var(--green)}
.on-dark .form button{background:var(--bone);color:var(--ink)}
.on-dark .form button:hover{background:var(--green-bright)}
.form-note{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--mute);margin-top:16px}
.on-dark .form-note{color:var(--mute-dark)}

/* ============ PALABRA ROTATIVA (CSS puro) ============ */
.swap{display:inline-grid;vertical-align:baseline;text-align:left;max-width:100%}
.swap>span{grid-area:1/1;opacity:0;animation:swapIn 16.5s infinite;white-space:nowrap}
.swap>span:nth-child(1){animation-delay:0s}
.swap>span:nth-child(2){animation-delay:2.75s}
.swap>span:nth-child(3){animation-delay:5.5s}
.swap>span:nth-child(4){animation-delay:8.25s}
.swap>span:nth-child(5){animation-delay:11s}
.swap>span:nth-child(6){animation-delay:13.75s}
@keyframes swapIn{
  0%{opacity:0;transform:translateY(.28em)}
  2%,14%{opacity:1;transform:translateY(0)}
  16.6%,100%{opacity:0;transform:translateY(-.28em)}
}
@media(prefers-reduced-motion:reduce){
  .swap>span{animation:none;opacity:0}
  .swap>span:first-child{opacity:1}
}

/* ============ REVEAL ============ */
.rv{opacity:0;transform:translateY(18px);transition:opacity .75s ease,transform .75s cubic-bezier(.22,.8,.3,1)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  *{transition-duration:.01ms!important;scroll-behavior:auto!important}
  .rv{opacity:1;transform:none}
}


/* ============ MECÁNICO PIXEL ============ */
.mech{
  --m-cap:#0E6B4A; --m-cap-dark:#0A4F37; --m-shirt:#14140F;
  --m-pants:#6B6A61; --m-skin:#C9A27A; --m-note:#0E6B4A; --m-crack:#14140F;
  width:clamp(96px,11vw,128px);height:auto;display:block;image-rendering:pixelated;flex:none;
}
.on-dark .mech{
  --m-cap:#1FA277; --m-cap-dark:#14805C; --m-shirt:#EFEDE4;
  --m-pants:#8C8B81; --m-note:#1FA277; --m-crack:#14140F;
}
/* se agacha con transición suave y la rayita aparece al agacharse */
@keyframes mechCrouch{0%{transform:translateY(0)}50%{transform:translateY(3px)}100%{transform:translateY(0)}}
@keyframes mechArm{0%{transform:translateY(0)}50%{transform:translateY(4px)}100%{transform:translateY(0)}}
@keyframes mechCrack{0%{opacity:.2}50%{opacity:.85}100%{opacity:.2}}
@keyframes mechNote{0%{opacity:0;transform:translate(0,0)}20%{opacity:1}100%{opacity:0;transform:translate(-6px,-18px)}}
.mech .m-body{animation:mechCrouch 2s ease-in-out infinite}
.mech .m-arm{animation:mechArm 2s ease-in-out infinite}
.mech .m-crack{opacity:.2;animation:mechCrack 2s ease-in-out infinite}
.mech .m-note{animation:mechNote 2.6s linear infinite}
.mech .m-note2{animation-delay:.85s}
.mech .m-note3{animation-delay:1.7s}
@media(prefers-reduced-motion:reduce){
  .mech .m-body,.mech .m-arm{animation:none}
  .mech .m-crack{animation:none;opacity:.6}
  .mech .m-note{animation:none;opacity:1}
}
/* la cita manda; el mecánico se acomoda a su derecha sin empujar el texto */
.quote-mech{display:flex;align-items:flex-end;gap:clamp(12px,2vw,28px);justify-content:space-between}
.quote-mech>blockquote{flex:1 1 auto;min-width:0}
@media(max-width:560px){
  .quote-mech{flex-direction:column;align-items:flex-start;gap:16px}
  .quote-mech .mech{align-self:flex-end}
}


/* guardas contra desborde horizontal en pantallas angostas */
.grid-lines>*{min-width:0}
.ch-body,.ch-body p,.ch-body h2,.mani-grid>*{min-width:0;overflow-wrap:break-word}
section,main,footer,.wrap{max-width:100%}


/* ============ MENÚ MÓVIL ============ */
.nav-toggle{
  display:none;width:42px;height:42px;margin-right:-10px;
  background:transparent;border:0;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:21px;height:2px;background:var(--ink);transition:transform .25s,opacity .2s}
.nav-dark .nav-toggle span{background:var(--bone)}
.nav-toggle[aria-expanded="true"] span:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:last-child{transform:translateY(-3.5px) rotate(-45deg)}
@media(max-width:860px){
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--bone);border-bottom:1px solid var(--rule);
    padding:4px var(--pad) 18px;display:none;
  }
  .nav-dark .nav-links{background:var(--ink);border-bottom-color:var(--rule-dark)}
  .nav-links.open{display:flex}
  .nav-links a{display:block!important;padding:15px 0;border-bottom:1px solid var(--rule);font-size:12.5px}
  .nav-dark .nav-links a{border-bottom-color:var(--rule-dark)}
  .nav-links a:last-child{border-bottom:0}
  .nav-yt{border:0!important;padding:15px 0!important;justify-content:flex-start}
  .nav-yt:hover{background:transparent;color:var(--green)!important}
}

/* ============ MENSAJES DEL FORMULARIO ============ */
.form-msg{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;
  margin-top:14px;padding-left:16px;border-left:3px solid var(--green);color:var(--ink);display:none;
}
.on-dark .form-msg{color:var(--bone);border-left-color:var(--green-bright)}
.form-msg.show{display:block}
.form-msg.error{border-left-color:#B3261E;color:#8C1D18}
.on-dark .form-msg.error{color:#F2B8B5;border-left-color:#F2B8B5}
.form input[aria-invalid="true"]{outline:2px solid #B3261E;outline-offset:-2px}

/* ============ ENLACES EN TEXTO CORRIDO ============ */
main p a:not(.btn):not(.inline-link){text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
main p a:not(.btn):not(.inline-link):hover{color:var(--green)}
.on-dark main p a:not(.btn):not(.inline-link):hover{color:var(--green-bright)}

/* ============ SALTAR AL CONTENIDO ============ */
a.sr:focus{
  position:fixed;top:10px;left:10px;width:auto;height:auto;clip:auto;z-index:200;
  background:var(--ink);color:var(--bone);padding:12px 18px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
}


/* ============ 6) PÁGINA ACTUAL ============ */
.nav-links a[aria-current]{color:var(--ink);position:relative}
.nav-links a[aria-current]::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--green)}
.nav-dark .nav-links a[aria-current]{color:var(--bone)}
.nav-dark .nav-links a[aria-current]::after{background:var(--green-bright)}
@media(max-width:860px){
  .nav-links a[aria-current]::after{left:0;right:auto;width:18px;bottom:8px}
}

/* ============ 9) PROGRESO DE LECTURA ============ */
#reading{position:absolute;left:0;bottom:-1px;height:2px;width:0;background:var(--green);z-index:2;transition:width .08s linear}
.nav-dark #reading{background:var(--green-bright)}
@media(prefers-reduced-motion:reduce){#reading{transition:none}}

/* ============ 9) VOLVER ARRIBA ============ */
#totop{
  position:fixed;right:clamp(16px,3vw,32px);bottom:clamp(16px,3vw,32px);z-index:70;
  width:46px;height:46px;display:flex;align-items:center;justify-content:center;
  background:var(--ink);color:var(--bone);border:0;cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s,transform .25s,visibility .25s,background .2s;
}
#totop.show{opacity:1;visibility:visible;transform:none}
#totop:hover{background:var(--green)}

/* ============ 8) ENLACES EXTERNOS ============ */
.ext-mark{display:inline-block;width:9px;height:9px;margin-left:2px;flex:none;opacity:.75}

/* ============ 15) ÁREA TÁCTIL ============ */
.inline-link{display:inline-block;padding:8px 0;min-height:44px;line-height:28px}

/* ============ 16) PIE ============ */
.foot-top{align-items:flex-start}
.foot-about{max-width:36ch}
.foot-about p{font-size:14.5px;line-height:1.6;color:#BDBCB2;margin-bottom:16px}
.foot-contact{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--bone);border-bottom:1px solid var(--green-bright);padding-bottom:3px;display:inline-block}
.foot-contact:hover{color:var(--green-bright)}
.foot-social{display:flex;gap:18px;margin-top:20px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase}
.foot-social a{color:#BDBCB2;display:inline-flex;align-items:center;gap:6px;padding:6px 0}
.foot-social a:hover{color:var(--green-bright)}
.foot-mark{font-size:clamp(2.6rem,11vw,9rem);margin-top:clamp(28px,4vw,48px)}

/* ============ 11) NOTA POSTERIOR AL ALTA ============ */
.form-after{font-size:13.5px;line-height:1.6;color:var(--mute);margin-top:14px;max-width:42ch}
.on-dark .form-after{color:var(--mute-dark)}