:root{--blue:#55778a;--blue-dark:#294755;--indigo:#7480a5;--green:#537566;--green-light:#9ab27a;--ink:#29484c;--paper:#f4f6f3;--shadow:0 10px 28px rgba(41,71,85,.13)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:#243536;font-family:"Segoe UI",Arial,sans-serif;line-height:1.55}.container{width:min(1160px,calc(100% - 40px));margin-inline:auto}.skip-link{position:fixed;left:1rem;top:-5rem;z-index:99;background:#fff;color:#000;padding:.7rem 1rem}.skip-link:focus{top:1rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.hero{min-height:530px;color:var(--blue-dark);position:relative;background-image:linear-gradient(180deg,rgba(240,250,255,.3),rgba(2,52,68,.2)),url("imgs/bnppal.jpg");background-size:cover;background-position:center;isolation:isolate}.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(4,47,58,.06) 70%,rgba(4,47,58,.35))}.nav{display:flex;align-items:center;justify-content:space-between;padding-block:27px}.brand{display:flex;gap:.65rem;align-items:center;color:var(--blue-dark);text-decoration:none;letter-spacing:.04em}.brand-mark{width:45px;height:45px;border:2px solid var(--green);border-radius:50%;display:grid;place-items:center;font-size:1.9rem;color:var(--green)}.brand strong{font:1.55rem/1 Georgia,serif}.brand small{display:block;font-size:.76rem;letter-spacing:.14em}.nav-links{display:flex;gap:2.5rem}.nav-links a{color:var(--blue-dark);text-decoration:none;font-family:Georgia,serif;padding:.45rem .1rem;border-bottom:2px solid transparent}.nav-links a:hover,.nav-links a:focus-visible,.nav-links a.active{border-color:var(--green)}.menu-toggle{display:none;border:0;background:transparent;padding:.5rem}.menu-toggle i{display:block;width:28px;height:2px;background:var(--blue-dark);margin:6px}.hero-copy{text-align:center;padding-top:72px;text-shadow:0 1px 12px rgba(255,255,255,.55)}.eyebrow,.section-kicker{text-transform:uppercase;letter-spacing:.2em;font-weight:700;font-size:.72rem;color:var(--green)}.hero h1{font:clamp(3rem,7vw,5.9rem)/1 Georgia,"Times New Roman",serif;margin:.1em 0}.hero-rule{display:flex;justify-content:center;align-items:center;gap:1rem;color:var(--green);font-size:2rem}.hero-rule span{height:1px;width:115px;background:var(--green)}.hero-rule b{font-weight:400}.subtitle{font:clamp(1.2rem,2.3vw,1.8rem)/1.35 Georgia,serif;margin:.25rem auto;max-width:760px;color:#174e45}
.intro{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(260px,.75fr);gap:5rem;padding-block:78px;align-items:start}.intro h2,.resources h2{font:clamp(2rem,4vw,3.15rem)/1.12 Georgia,serif;color:#245743;margin:.2em 0 .65em}.intro h2::after,.resources h2::after{content:"";display:block;width:70px;height:2px;background:var(--green);margin-top:.4em}.intro p{max-width:75ch}.intro blockquote{margin:0 0 1.5rem;padding-left:1rem;border-left:3px solid var(--green-light);font-family:Georgia,serif;color:#39534a}.intro cite{display:block;font:normal .85rem/1.5 "Segoe UI",sans-serif;margin-top:.4rem}.welcome{font-weight:700;color:var(--green)}.timeline-figure{margin:50px 0 0;background:#eef1e7;border:1px solid #dbe1d0;padding:2rem;border-radius:4px;box-shadow:var(--shadow);position:sticky;top:25px}.timeline-figure img{display:block;width:100%;height:auto}.timeline-figure figcaption{display:grid;gap:.8rem;margin-top:1rem}.timeline-figure figcaption strong{font-family:Georgia,serif;color:var(--ink)}.timeline-figure figcaption span{font-size:.82rem}.timeline-figure i{display:inline-block;width:12px;height:12px;background:#7f7f00;margin-right:.4rem}.timeline-figure span:last-child i{background:#ffffce;border:1px solid #bdbb8c}
.resources{background:#eceee6;padding-block:72px}.resources-lead{max-width:660px;margin-top:-.8rem}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:32px}.card{background:#fff;border:1px solid #dfe2d9;border-radius:8px;overflow:hidden;box-shadow:0 4px 12px rgba(20,55,50,.08);transition:transform .25s ease,box-shadow .25s ease}.card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.card a{display:block;color:inherit;text-decoration:none;height:100%}.card img{display:block;width:100%;height:185px;object-fit:cover}.card-body{display:flex;flex-direction:column;padding:1rem 1.2rem 1.25rem;min-height:160px}.card small{text-transform:uppercase;letter-spacing:.12em;color:var(--green);font-size:.66rem;font-weight:700}.card strong{font:1.35rem/1.15 Georgia,serif;color:#222;margin:.4rem 0;flex:1}.card em{font-style:normal;color:#07568b;font-weight:700;font-size:.88rem}.card a:focus-visible{outline:3px solid var(--green-light);outline-offset:-3px}
footer{background:linear-gradient(120deg,var(--blue-dark),#07506f);color:#fff}.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:38px;padding-block:45px}.footer-grid section{display:flex;gap:1rem}.footer-grid section+section{border-left:1px solid rgba(255,255,255,.25);padding-left:32px}.footer-icon{flex:0 0 52px;width:52px;height:52px;border:2px solid var(--green-light);color:#b3cd55;border-radius:50%;display:grid;place-items:center;font-size:1.35rem}.footer-grid h2{font:1.15rem Georgia,serif;margin:0 0 .5rem}.footer-grid p{font-size:.82rem;margin:0 0 .65rem;color:#d9e5e9}.footer-grid a{color:#d7ec8a;font-size:.82rem}.footer-note{text-align:center;margin:0;padding:14px 20px;background:rgba(38,109,72,.55);font-family:Georgia,serif;color:#d5e1c0}
@media(max-width:800px){.hero{min-height:470px}.nav-links{display:none;position:absolute;top:86px;left:20px;right:20px;background:rgba(247,245,239,.97);padding:1rem;box-shadow:var(--shadow);flex-direction:column;gap:.3rem;z-index:5}.nav-links.open{display:flex}.menu-toggle{display:block}.hero-copy{padding-top:55px}.intro{grid-template-columns:1fr;gap:1rem;padding-block:54px}.timeline-figure{position:static;margin-top:10px}.cards{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr}.footer-grid section+section{border-left:0;border-top:1px solid rgba(255,255,255,.25);padding:28px 0 0}}
@media(max-width:520px){.container{width:min(100% - 28px,1160px)}.brand strong{font-size:1.25rem}.brand-mark{width:38px;height:38px}.hero{min-height:440px}.hero-copy{padding-top:45px}.hero-rule span{width:65px}.cards{grid-template-columns:1fr}.card img{height:200px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.card{transition:none}}

/* Banner restaurado a partir del paisaje original. Las capas laterales ocultan
   la rotulación incrustada de 2007 sin reconstruir ni alterar el relieve. */
.hero{min-height:420px;padding:18px 22px 30px;color:#fff;background:linear-gradient(112deg,#304955 0%,#607589 58%,#858eaf 100%);isolation:isolate;overflow:hidden}
.hero::before{content:"";position:absolute;z-index:-2;inset:82px max(22px,3.2vw) 28px;border:1px solid rgba(231,240,242,.48);border-radius:22px;background-color:#597082;background-image:linear-gradient(90deg,rgba(39,66,78,.38) 0%,rgba(53,78,91,.10) 52%,rgba(102,111,145,.26) 100%),url("imgs/banner-valle-limpio.jpg");background-size:100% 100%,contain;background-repeat:no-repeat;background-position:center,center 28%;box-shadow:0 18px 38px rgba(33,55,66,.24),inset 0 0 0 1px rgba(255,255,255,.16)}
.hero::after{content:"";position:absolute;z-index:-1;inset:82px max(22px,3.2vw) 28px;border-radius:22px;background:linear-gradient(180deg,rgba(255,255,255,.05) 0%,rgba(39,63,76,.10) 48%,rgba(37,61,74,.66) 70%,rgba(34,56,68,.82) 100%);pointer-events:none}
.nav{position:relative;z-index:2;color:#f8fbff}
.brand{color:#fff}.brand-mark{border-color:#a8bc8a;color:#d2dfbd}.nav-links a{color:#f8fbff}.nav-links a:hover,.nav-links a:focus-visible,.nav-links a.active{border-color:#a8bc8a}.menu-toggle i{background:#fff}
.hero-copy{position:relative;z-index:1;width:min(1180px,92%);margin:0 auto;padding:132px 0 38px;text-align:left;text-shadow:0 2px 14px rgba(0,12,30,.45)}
.hero h1{max-width:660px;color:#fff;font-size:clamp(4rem,9vw,7.6rem);letter-spacing:-.035em;line-height:.92}
.hero-rule{justify-content:flex-start;margin:20px 0 14px;color:#d1ddbd}.hero-rule span{background:#9ab27a}
.subtitle{max-width:610px;margin:.25rem 0;color:#f2f7f4;font-size:clamp(1.4rem,3vw,2.15rem);font-style:normal;line-height:1.25}
.resources{background:linear-gradient(180deg,#f0f3f0,#e9efef)}
.card .valley-thumbnail{height:198px;padding:9px 28px;object-fit:contain;object-position:center;background:linear-gradient(90deg,#9babb0 0 28px,#e7edef 28px calc(100% - 28px),#9babb0 calc(100% - 28px));border-top:1px solid #b8c5c7;border-bottom:1px solid #b8c5c7;box-shadow:inset 0 0 18px rgba(47,75,84,.14);filter:saturate(1.03) contrast(1.02)}
.documentary-landscape{object-fit:contain;object-position:center}
.card:has(.valley-thumbnail){border-color:rgba(85,119,138,.28);box-shadow:0 12px 24px rgba(41,71,85,.12)}
.card em{color:var(--blue)}
footer{background:linear-gradient(105deg,#294755,#53717b 55%,#6e7898)}
.footer-icon{border-color:#9ab27a;color:#cfddb7}.footer-grid a{color:#dce8bd}.footer-note{background:rgba(73,111,101,.48);color:#e2e9df}
@media(max-width:800px){.hero{min-height:375px;padding-inline:12px}.hero::before,.hero::after{inset:76px 14px 18px}.hero-copy{padding:112px 0 30px}.hero h1{font-size:clamp(3.5rem,12vw,6rem)}.nav-links{background:rgba(7,27,58,.98)}}
@media(max-width:560px){.hero{min-height:350px}.hero::before,.hero::after{inset:70px 10px 14px;border-radius:16px}.hero-copy{width:88%;padding:108px 0 26px}.subtitle{font-size:1.22rem;max-width:290px}.card .valley-thumbnail{height:180px;padding:8px 22px;background:linear-gradient(90deg,#9babb0 0 22px,#e7edef 22px calc(100% - 22px),#9babb0 calc(100% - 22px))}}
@media(max-width:520px){.hero{min-height:370px}.hero-copy{padding-top:38px}}

/* Paleta compartida con la portada de Línea de tiempo */
:root{
  --blue:#2f6f83;
  --blue-dark:#123e59;
  --indigo:#36566b;
  --green:#557c63;
  --green-light:#9fb384;
  --ink:#12324a;
  --ink-soft:#36566b;
  --paper:#f6f4ed;
  --paper-cool:#edf2ee;
  --line:rgba(26,69,78,.18);
  --white:#fffef9;
  --shadow:0 22px 60px rgba(21,54,67,.13)
}
body{color:var(--ink);background:var(--paper)}
.hero{background:linear-gradient(135deg,#0f364e 0%,#285d6e 48%,#567760 100%)}
.hero::before{border-color:rgba(220,233,223,.42);background-color:#31596a;background-image:linear-gradient(90deg,rgba(15,54,78,.44),rgba(40,93,110,.08) 55%,rgba(86,119,96,.32)),url("imgs/banner-valle-limpio.jpg");box-shadow:0 22px 58px rgba(8,29,38,.3),inset 0 0 0 1px rgba(255,255,255,.14)}
.hero::after{background:linear-gradient(180deg,rgba(255,255,255,.03),rgba(15,54,78,.05) 42%,rgba(15,54,78,.55) 72%,rgba(8,35,49,.8))}
.hero-rule span{background:var(--green-light)}
.intro h2,.resources h2,.about-project h2,.dating-section h2,.home-references h2{color:var(--ink)}
.intro h2::after,.resources h2::after,.about-project h2::after,.dating-section h2::after,.home-references h2::after{background:var(--green)}
.resources{background:linear-gradient(180deg,var(--paper-cool),#e4ece8)}
footer{background:linear-gradient(135deg,#0f364e 0%,#285d6e 58%,#567760 100%)}

/* Texto revisado y gráfico temporal 500 / 10.000 */
.intro{grid-template-columns:minmax(0,1.32fr) minmax(300px,.68fr);gap:clamp(3rem,6vw,5.5rem);padding-bottom:64px}
.intro-text p{color:#304d5d;font-size:.98rem}
.intro blockquote{padding:18px 20px;border-left:3px solid var(--green-light);background:rgba(237,242,238,.72);border-radius:0 10px 10px 0;color:var(--ink)}
.ratio-figure{margin-top:58px;padding:28px;background:#fbfcf6;border-color:rgba(85,124,99,.22);border-radius:18px;box-shadow:var(--shadow)}
.ratio-figure>img{width:100%;height:auto;border:1px solid rgba(47,111,131,.14);border-radius:12px;background:#e7e9df;box-shadow:0 12px 26px rgba(21,54,67,.12)}
.ratio-heading{display:grid;grid-template-columns:1fr auto 1fr;align-items:end;gap:8px;padding:5px 2px 18px;color:var(--blue-dark);font-family:Georgia,serif;text-align:center}
.ratio-heading span{font-size:clamp(2rem,4vw,3.2rem);line-height:1}
.ratio-heading b{padding-bottom:.2em;color:var(--green);font-size:1.5rem}
.ratio-heading strong{grid-column:1/-1;color:var(--ink-soft);font:700 .82rem "Segoe UI",sans-serif;letter-spacing:.14em;text-transform:uppercase}
.stone-ratio{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:16px;border:1px solid rgba(47,111,131,.18);border-radius:14px;background:linear-gradient(145deg,#f8faf4,#e8efea)}
.stone-ratio i{position:relative;display:block;width:100%;height:auto;min-height:42px;aspect-ratio:1.08;border:1px solid rgba(37,69,63,.28);border-radius:46% 54% 43% 57% / 54% 42% 58% 46%;background:radial-gradient(circle at 28% 24%,rgba(185,205,159,.95) 0 9%,transparent 10%),radial-gradient(circle at 72% 70%,rgba(97,129,82,.56) 0 13%,transparent 14%),linear-gradient(145deg,#778b78,#506b62 60%,#304e49);box-shadow:inset 4px 5px 8px rgba(255,255,255,.18),inset -5px -6px 10px rgba(18,50,45,.22),0 3px 6px rgba(21,54,67,.13);transform:rotate(var(--tilt,0deg))}
.stone-ratio i:nth-child(3n){--tilt:2deg}.stone-ratio i:nth-child(4n){--tilt:-2deg}
.stone-ratio i.recent{background:radial-gradient(circle at 30% 25%,rgba(235,235,193,.92) 0 9%,transparent 10%),linear-gradient(145deg,#dcd9b8,#b7b58f 64%,#8d8b6e);border-color:#a19e73}
.ratio-note{margin:14px 0 2px!important;color:var(--ink-soft)!important;font-size:.78rem!important;text-align:center}
.ratio-figure figcaption{padding-top:13px;border-top:1px solid var(--line)}
.ratio-figure figcaption span{display:flex;align-items:center}
.ratio-figure figcaption span i{flex:0 0 13px;width:13px;height:13px;border-radius:50%;background:#557c63;box-shadow:inset 0 0 0 3px #9fb384}
.ratio-figure figcaption span:last-of-type i{background:#d2d0a6;border:1px solid #a19e73;box-shadow:none}
.ratio-figure figcaption small{color:#6b7d7d;font-size:.7rem;line-height:1.45}

/* Presentación institucional */
.about-project{padding-block:70px 90px;border-top:1px solid var(--line)}
.about-project h2,.dating-section h2,.home-references h2{margin:.15em 0 .65em;font:clamp(2rem,4vw,3.15rem)/1.12 Georgia,serif}
.about-project h2::after,.dating-section h2::after,.home-references h2::after{content:"";display:block;width:70px;height:2px;margin-top:.4em}
.about-columns{columns:2 420px;column-gap:56px}
.about-columns p{break-inside:avoid;margin:0 0 1.25rem;color:var(--ink-soft)}

/* Citas Vancouver con enlace y vista emergente */
.home-cite{position:relative;display:inline-flex;margin-left:.18em;vertical-align:super;font-size:.68em;line-height:1}
.home-cite a{position:relative;color:var(--blue);font-weight:800;text-decoration:none}
.home-cite a::after{content:attr(data-reference);position:absolute;z-index:30;left:50%;bottom:calc(100% + 11px);width:min(360px,78vw);padding:11px 13px;color:white;text-align:left;background:var(--blue-dark);border-radius:9px;box-shadow:0 12px 35px rgba(6,29,39,.3);font:500 .74rem/1.45 "Segoe UI",sans-serif;opacity:0;pointer-events:none;transform:translate(-50%,5px);transition:opacity .18s ease,transform .18s ease}
.home-cite a:hover::after,.home-cite a:focus-visible::after{opacity:1;transform:translate(-50%,0)}

/* Plano cartesiano y tabla técnica */
.dating-section{padding-block:88px 96px;background:linear-gradient(180deg,#e8efea 0%,#f6f4ed 100%);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.dating-heading{display:grid;grid-template-columns:minmax(0,.9fr) minmax(320px,1.1fr);gap:clamp(40px,8vw,110px);align-items:end;margin-bottom:36px}
.dating-heading p:last-child{margin:0;color:var(--ink-soft)}
.dating-plot-shell{width:100%;padding:20px 18px 16px;overflow-x:auto;overflow-y:hidden;scrollbar-gutter:stable;scrollbar-color:var(--green) #dbe5df;scrollbar-width:auto;border:1px solid rgba(26,69,78,.18);border-radius:20px;background:rgba(255,254,249,.94);box-shadow:var(--shadow)}
.dating-plot-shell:focus-visible{outline:3px solid rgba(47,111,131,.45);outline-offset:4px}
.dating-plot-shell::-webkit-scrollbar{height:15px}.dating-plot-shell::-webkit-scrollbar-track{background:#dbe5df;border-radius:10px}.dating-plot-shell::-webkit-scrollbar-thumb{background:linear-gradient(90deg,var(--blue),var(--green));border:3px solid #dbe5df;border-radius:10px}
.dating-plot{display:block;width:2380px;max-width:none;min-width:2380px;height:auto;color:var(--ink)}
.dating-grid{stroke-width:1}
.dating-grid-major{stroke:rgba(26,69,78,.16);stroke-width:1.15}
.dating-grid-minor{stroke:rgba(26,69,78,.075)}
.dating-axis{stroke:rgba(18,50,74,.5);stroke-width:1.4}
.dating-study-guide{stroke:rgba(26,69,78,.06);stroke-width:1}
.dating-y-label,.dating-x-tick{fill:#61767c;font:600 12px "Segoe UI",sans-serif}
.dating-x-tick-major{font-weight:700}
.dating-x-tick-minor{fill:#819093;font-size:10px;font-weight:600}
.dating-study-label{fill:var(--ink-soft);font:700 12px "Segoe UI",sans-serif}
.dating-axis-title{fill:var(--ink);font:800 12px "Segoe UI",sans-serif;letter-spacing:.07em;text-transform:uppercase}
.dating-point{color:white;cursor:help;outline:none}
.dating-point circle{fill:var(--green);stroke:var(--white);stroke-width:3;filter:drop-shadow(0 3px 5px rgba(21,54,67,.2))}
.dating-point:focus circle,.dating-point:hover circle{stroke:var(--blue-dark);stroke-width:4}
.dating-icon{pointer-events:none}
.dating-provisional circle{fill:#b28132;stroke-dasharray:3 2}
.dating-pending circle{fill:#7c6e58}
.dating-questioned circle{fill:#8d5960;stroke-dasharray:2 2}
.dating-method-tl circle{fill:#2f6f83}
.dating-legend{display:flex;flex-wrap:wrap;gap:12px 24px;margin:20px 3px 0;color:var(--ink-soft);font-size:.77rem}
.dating-legend span{display:flex;align-items:center;gap:8px}
.dating-legend i{width:12px;height:12px;border:2px solid white;border-radius:50%;background:var(--green);box-shadow:0 0 0 1px var(--green)}
.dating-legend .legend-provisional{background:#b28132;box-shadow:0 0 0 1px #b28132}
.dating-legend .legend-pending{background:#7c6e58;box-shadow:0 0 0 1px #7c6e58}
.dating-legend .legend-questioned{background:#8d5960;box-shadow:0 0 0 1px #8d5960}
.dating-legend .legend-tl{background:#2f6f83;box-shadow:0 0 0 1px #2f6f83}
.dating-method-note{max-width:950px;margin:20px 0 0;color:var(--ink-soft);font-size:.82rem}
.social-change{margin-top:42px;padding:clamp(28px,4vw,46px);border:1px solid var(--line);border-radius:18px;background:rgba(255,254,249,.86);box-shadow:0 14px 38px rgba(21,54,67,.08)}
.social-change h3{margin:.1em 0 .8em;color:var(--ink);font:400 clamp(1.8rem,3.5vw,2.8rem)/1.12 Georgia,serif;letter-spacing:-.025em}
.social-change-grid{columns:2 430px;column-gap:52px}
.social-change-grid p{break-inside:avoid;margin:0 0 1.25rem;color:var(--ink-soft);font-size:.9rem}
.dating-table-panel{margin-top:38px;border:1px solid var(--line);border-radius:14px;background:rgba(255,254,249,.94);overflow:hidden}
.dating-table-panel summary{position:relative;padding:19px 56px 19px 22px;color:var(--blue-dark);cursor:pointer;font:700 1.16rem Georgia,serif;list-style:none}
.dating-table-panel summary::-webkit-details-marker{display:none}
.dating-table-panel summary::after{content:"+";position:absolute;right:20px;top:50%;width:28px;height:28px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;color:var(--green);transform:translateY(-50%)}
.dating-table-panel[open] summary::after{content:"−"}
.dating-table-panel>p{margin:0;padding:18px 22px;color:var(--ink-soft);border-top:1px solid var(--line);font-size:.83rem}
.dating-table-wrap{overflow-x:auto;border-top:1px solid var(--line)}
.dating-table-wrap table{width:100%;min-width:1050px;border-collapse:collapse;font-size:.74rem;line-height:1.42}
.dating-table-wrap th,.dating-table-wrap td{padding:11px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.dating-table-wrap th{position:sticky;top:0;color:var(--ink);background:#dce7df;font-size:.66rem;letter-spacing:.06em;text-transform:uppercase}
.dating-table-wrap tbody tr:nth-child(even){background:rgba(237,242,238,.48)}
.dating-row-provisional{box-shadow:inset 4px 0 #b28132}.dating-row-pending{box-shadow:inset 4px 0 #7c6e58}.dating-row-questioned{box-shadow:inset 4px 0 #8d5960}
.dating-status{display:inline-block;margin-right:4px;color:var(--ink-soft);font-size:.67rem;font-weight:800}

/* Referencias finales */
.home-references{padding-block:80px 100px}
.home-references>ol{columns:2 430px;column-gap:58px;margin:38px 0 0;padding-left:1.5rem}
.home-references li{break-inside:avoid;margin:0 0 1rem;padding-left:.35rem;color:var(--green)}
.home-references li,.home-references li a{font-size:.79rem;line-height:1.52}
.home-references li a{color:var(--ink-soft);text-decoration-color:rgba(47,111,131,.45);text-underline-offset:3px}
.home-references li:target{padding:8px 10px 8px .35rem;border-radius:7px;background:#e3eadf}

@media(max-width:900px){
  .dating-heading{grid-template-columns:1fr;gap:15px}
  .dating-plot-shell{overflow-x:auto}
  .dating-plot{width:2380px;min-width:2380px}
}
@media(max-width:800px){
  .intro{grid-template-columns:1fr}
  .ratio-figure{max-width:480px;margin-inline:auto}
  .about-columns{columns:1}
}
@media(max-width:560px){
  .stone-ratio{grid-template-columns:repeat(4,1fr);gap:6px;padding:11px}
  .ratio-heading span{font-size:2rem}
  .dating-section{padding-block:64px}
  .dating-plot-shell{padding:10px 6px 0;border-radius:12px}
  .dating-legend{display:grid;grid-template-columns:1fr}
  .social-change-grid{columns:1}
  .home-references>ol{columns:1}
}

/* Portada · recorridos temáticos actualizados */
.resources .resources-lead{max-width:780px;margin:-.55rem 0 2rem;color:var(--ink-soft);font-size:.98rem}
/* Símbolos originales: seis accesos de trazo uniforme. */
.explore-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:32px}
.explore-link{--explore-accent:#365944;--explore-wash:#e6eee6;position:relative;display:flex;flex-direction:column;min-width:0;padding:24px 28px 26px;border:1px solid #c8d2c9;border-radius:12px;background:#fafbf7;color:var(--explore-accent);text-decoration:none;transition:background-color .2s ease,border-color .2s ease,transform .2s ease}
.explore-time{--explore-accent:#80522d;--explore-wash:#f1e8dd}
.explore-stone{--explore-accent:#4b5e59;--explore-wash:#e4ebe8}
.explore-food{--explore-accent:#536b30;--explore-wash:#eaf0de}
.explore-symbol{--explore-accent:#814e44;--explore-wash:#f2e6e1}
.explore-credits{--explore-accent:#365f74;--explore-wash:#e1ebf0}
.explore-top{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:20px}
.explore-icon{display:block;width:64px;height:64px;flex-shrink:0}
.explore-number{font:500 .8125rem/1.4 Arial,sans-serif;letter-spacing:.08em;padding-top:4px}
.explore-title{display:block;max-width:100%;font:1.35rem/1.25 Georgia,serif;margin-bottom:8px}
.explore-caption{display:block;padding-right:28px;color:#50615c;font-size:.875rem;line-height:1.5;margin-top:auto}
.explore-arrow{position:absolute;bottom:27px;right:24px;width:20px;height:20px}
.explore-link:visited{color:var(--explore-accent)}
@media(hover:hover){.explore-link:hover{background:var(--explore-wash);border-color:var(--explore-accent);transform:translateY(-3px)}}
.explore-link:focus-visible{outline:3px solid var(--explore-accent);outline-offset:4px;background:var(--explore-wash)}
.explore-link:active{transform:translateY(0);background:var(--explore-wash)}
@media(max-width:800px){.explore-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.explore-link{padding:22px}.explore-title{font-size:1.25rem}.explore-arrow{right:20px;bottom:23px}}
@media(max-width:520px){.explore-grid{grid-template-columns:1fr;gap:12px}.explore-link{padding:20px 46px 20px 88px;min-height:108px;justify-content:center}.explore-top{position:absolute;left:18px;top:25px;margin:0}.explore-icon{width:52px;height:52px}.explore-number{display:none}.explore-title{font-size:1.25rem;margin-bottom:5px}.explore-caption{padding:0;margin-top:0}.explore-arrow{right:17px;bottom:calc(50% - 10px)}}
@media(prefers-reduced-motion:reduce){.explore-link{transition:none}.explore-link:hover{transform:none}}
.social-change-lead{max-width:930px;margin:-.35rem 0 1.8rem;padding:16px 19px;border-left:4px solid #c3964b;border-radius:0 10px 10px 0;background:#f3efe2;color:var(--ink);font:1rem/1.65 Georgia,'Times New Roman',serif}
.social-change-grid p strong{color:var(--ink);font-family:Georgia,'Times New Roman',serif;font-size:1.04rem;font-weight:600}
@media(max-width:800px){.card-visual{height:210px}.card-body{min-height:250px}}
@media(max-width:520px){.cards{gap:20px}.card-visual{height:225px;margin:14px 14px 0}.card-body{min-height:0}.card strong{font-size:1.4rem}}

/* Portada: índice temático con enlaces directos. */
.hero-explore{display:inline-flex;align-items:center;gap:18px;margin-top:22px;padding:12px 22px;border-radius:6px;background:#244d43;color:#fff;text-decoration:none;text-shadow:none;font-weight:600}
.hero-explore:hover,.hero-explore:focus-visible{background:#173b32;outline:2px solid #fff;outline-offset:3px}
.nav-links{gap:1.3rem;flex-wrap:wrap}
.resources{padding-block:54px}
.directory-jumps{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0}
.directory-jumps a{display:flex;align-items:center;min-height:44px;padding:8px 16px;border:1px solid #b9c9be;border-radius:30px;color:#294c40;text-decoration:none;font-size:.9375rem;background:#f6f8f3}
.directory-jumps a:hover{background:#dce7de;border-color:#365944}
.directory-search{padding:22px 24px;border:1px solid #c1cfc6;border-radius:10px;background:#f9fbf7;margin-top:26px}
.directory-search label{display:block;font-weight:650;color:#294c40;margin-bottom:9px}
.directory-search-row{display:flex;gap:12px;align-items:stretch}
.directory-search input{flex:1;min-width:0;width:100%;padding:12px 15px;border:1px solid #829c8e;border-radius:5px;background:#fff;color:#243536;font:inherit}
.directory-search button{padding:10px 16px;border:1px solid #829c8e;border-radius:5px;color:#294c40;background:#edf2ec;font:inherit;cursor:pointer}
.directory-search p{margin:8px 0 0;font-size:.875rem;color:#4c6259}
#content-search-status{font-weight:600}
.directory-group{min-width:0;border:1px solid #c1cfc6;border-radius:12px;background:#fafbf7;scroll-margin-top:24px;overflow:hidden}
.directory-group .explore-link{border:0;border-radius:0;min-height:190px;border-bottom:1px solid #dce4dd}
.directory-group .explore-top{margin-bottom:10px}
.directory-group .explore-title{margin:0 0 8px;font-weight:400}
.directory-group .explore-link:focus-visible{outline-offset:-4px}
.directory-group .explore-link:hover{transform:none}
.directory-links{list-style:none;padding:10px 22px;margin:0}
.directory-links li+li{border-top:1px solid #e1e7e0}
.directory-links a{display:flex;flex-direction:column;justify-content:center;gap:2px;min-height:48px;padding:10px 0;color:#294c40;font-size:1rem;line-height:1.4;text-decoration:underline;text-decoration-color:#b4c3b7;text-underline-offset:4px;overflow-wrap:anywhere}
.directory-links a:hover{color:#102f25;text-decoration-color:currentColor;background:#edf2eb}
.directory-links small{color:#5d6b64;font-size:.8125rem;text-decoration:none}
.directory-more{padding-bottom:6px}
.directory-more summary{cursor:pointer;min-height:44px;padding:12px 22px;color:#365944;font-size:.9375rem;font-weight:650}
.directory-more[open] summary{border-bottom:1px solid #e1e7e0}
.directory-support{display:flex;align-items:center;flex-wrap:wrap;gap:8px 24px;margin-top:30px;padding-top:22px;border-top:1px solid #bacdc0}
.directory-support span{font-size:.875rem;color:#50615c}
.directory-support a{display:flex;align-items:center;min-height:44px;color:#294c40;text-underline-offset:4px}
.directory-empty{padding:24px;border:1px dashed #829c8e;border-radius:8px}
.resources [hidden]{display:none!important}
.resources :is(input,button,summary,.directory-jumps a,.directory-links a,.directory-support a):focus-visible{outline:3px solid #365944;outline-offset:3px;border-radius:3px}
#recursos,#presentacion,#dataciones,#glosario{scroll-margin-top:20px}
@media(max-width:800px){.directory-group .explore-link{min-height:180px}.directory-links{padding-inline:18px}}
@media(max-width:520px){.hero-copy{padding-top:25px}.hero-explore{margin-top:16px}.resources{padding-block:36px}.directory-search{padding:18px}.directory-search-row{flex-direction:column}.directory-search button{align-self:flex-start;min-height:44px}.directory-group .explore-link{min-height:110px}.directory-group .explore-top{margin:0}.directory-group .explore-title{margin-bottom:5px}.directory-links{padding-block:4px}.directory-jumps{gap:6px}.directory-jumps a{padding-inline:12px}.directory-support{gap:4px 20px}}

/* Glosario de lectura accesible */
.glossary-section{padding-block:82px 92px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:linear-gradient(150deg,#f8f6ef 0%,#e8efea 100%)}
.glossary-heading{display:grid;grid-template-columns:minmax(0,.78fr) minmax(320px,1.22fr);gap:16px 64px;align-items:end;margin-bottom:38px}
.glossary-heading .section-kicker{grid-column:1/-1;margin:0}
.glossary-heading h2{margin:0;color:var(--ink);font:clamp(2.1rem,4vw,3.35rem)/1.08 Georgia,serif;letter-spacing:-.025em}
.glossary-heading h2::after{content:"";display:block;width:70px;height:2px;margin-top:.42em;background:var(--green)}
.glossary-heading>p:last-child{margin:0;color:var(--ink-soft);line-height:1.65}
.glossary-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:0}
.glossary-grid div{min-height:168px;padding:20px 19px 18px;border:1px solid rgba(26,69,78,.16);border-radius:14px;background:rgba(255,254,249,.88);box-shadow:0 9px 24px rgba(21,54,67,.055)}
.glossary-grid dt{margin:0 0 .55rem;color:var(--blue-dark);font:700 1.05rem/1.2 Georgia,serif}
.glossary-grid dd{margin:0;color:var(--ink-soft);font-size:.79rem;line-height:1.58}
@media(max-width:1000px){.glossary-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:760px){.glossary-heading{grid-template-columns:1fr;gap:14px}.glossary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:480px){.glossary-grid{grid-template-columns:1fr}.glossary-grid div{min-height:0}}