:root{
  --obs-ink:#10233f;
  --obs-ink-soft:#35506f;
  --obs-paper:#f7f9fc;
  --obs-white:#fff;
  --obs-line:#dbe4ef;
  --obs-indigo:#4f46e5;
  --obs-indigo-dark:#3730a3;
  --obs-cyan:#0e7490;
  --obs-mint:#dff8f0;
  --obs-yellow:#fff4bf;
  --obs-red:#b42318;
  --obs-shadow:0 18px 50px rgba(15,35,63,.08);
  --obs-radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--obs-ink);background:var(--obs-paper);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;line-height:1.68;-webkit-font-smoothing:antialiased}
a{color:var(--obs-indigo-dark);text-decoration-thickness:1.5px;text-underline-offset:3px}
a:hover{color:var(--obs-indigo)}
img{max-width:100%;height:auto}
.obs-skip{position:absolute;left:-9999px;top:0;z-index:999;padding:10px 14px;background:#fff;color:#111}
.obs-skip:focus{left:12px;top:12px}
.obs-site-header{position:sticky;top:0;z-index:30;border-bottom:1px solid rgba(219,228,239,.9);background:rgba(255,255,255,.95);backdrop-filter:blur(12px)}
.obs-header-inner{max-width:1180px;margin:auto;padding:13px 22px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.obs-brand{display:flex;align-items:center;gap:11px;color:var(--obs-ink);font-weight:900;text-decoration:none;letter-spacing:-.02em}
.obs-brand-mark{display:grid;place-items:center;width:35px;height:35px;border-radius:11px;color:#fff;background:linear-gradient(135deg,var(--obs-indigo),var(--obs-cyan));font-size:15px;box-shadow:0 8px 18px rgba(79,70,229,.23)}
.obs-brand small{display:block;color:#6b7c93;font-size:11px;line-height:1.1;letter-spacing:.06em;text-transform:uppercase}
.obs-nav{display:flex;align-items:center;gap:19px;flex-wrap:wrap;font-size:14px;font-weight:750}
.obs-nav a{text-decoration:none;color:var(--obs-ink-soft)}
.obs-nav a[aria-current="page"],.obs-nav a:hover{color:var(--obs-indigo)}
.obs-nav .obs-nav-cta{padding:8px 13px;border-radius:999px;color:#fff;background:var(--obs-indigo)}
.obs-nav .obs-nav-cta:hover{color:#fff;background:var(--obs-indigo-dark)}
.obs-wrap{max-width:1180px;margin:0 auto;padding:0 22px}
.obs-hero{padding:62px 0 42px;background:radial-gradient(circle at 90% 0,rgba(14,116,144,.15),transparent 32%),radial-gradient(circle at 5% 5%,rgba(79,70,229,.15),transparent 34%),linear-gradient(180deg,#fff 0,#f7f9fc 100%);border-bottom:1px solid var(--obs-line)}
.obs-breadcrumb{margin:0 0 25px;font-size:13px;color:#667891}
.obs-breadcrumb ol{list-style:none;display:flex;gap:8px;flex-wrap:wrap;padding:0;margin:0}
.obs-breadcrumb li:not(:last-child)::after{content:"/";margin-left:8px;color:#9babbe}
.obs-breadcrumb a{color:inherit;text-decoration:none}
.obs-kicker{display:inline-flex;align-items:center;gap:8px;margin:0 0 15px;padding:6px 11px;border-radius:999px;background:var(--obs-yellow);color:#604900;font-size:12px;font-weight:850;text-transform:uppercase;letter-spacing:.055em}
.obs-hero h1{max-width:920px;margin:0;font-size:clamp(35px,5.4vw,67px);line-height:1.03;letter-spacing:-.045em;color:var(--obs-ink)}
.obs-hero .obs-lead{max-width:850px;margin:22px 0 0;color:var(--obs-ink-soft);font-size:clamp(18px,2vw,22px);line-height:1.58}
.obs-meta{display:flex;flex-wrap:wrap;gap:9px 18px;margin-top:24px;color:#63758d;font-size:13px;font-weight:650}
.obs-meta span{display:inline-flex;align-items:center;gap:6px}
.obs-answer{position:relative;margin:30px 0 0;padding:24px 25px 23px;border:1px solid #b8ddd2;border-left:5px solid #15916d;border-radius:var(--obs-radius);background:linear-gradient(135deg,#f6fffb,var(--obs-mint));box-shadow:0 12px 30px rgba(21,145,109,.08)}
.obs-answer::before{content:"Respuesta corta";display:block;margin-bottom:7px;color:#087558;font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.07em}
.obs-answer p{margin:0;font-size:17px;color:#173e35}
.obs-main{padding:42px 0 76px}
.obs-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:42px;align-items:start}
.obs-content{min-width:0}
.obs-aside{position:sticky;top:83px}
.obs-aside-box{padding:19px;border:1px solid var(--obs-line);border-radius:16px;background:#fff;box-shadow:0 10px 26px rgba(15,35,63,.05)}
.obs-aside-box+.obs-aside-box{margin-top:16px}
.obs-aside h2{margin:0 0 11px;font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:#64748b}
.obs-aside ul{list-style:none;padding:0;margin:0}
.obs-aside li+li{border-top:1px solid #edf1f6}
.obs-aside a{display:block;padding:9px 0;color:var(--obs-ink-soft);font-size:14px;font-weight:720;text-decoration:none}
.obs-aside a:hover{color:var(--obs-indigo)}
.obs-section{margin:0 0 42px;scroll-margin-top:95px}
.obs-section h2{margin:0 0 16px;font-size:clamp(26px,3vw,36px);line-height:1.16;letter-spacing:-.025em}
.obs-section h3{margin:28px 0 10px;font-size:21px;line-height:1.28}
.obs-section p{margin:0 0 16px}
.obs-section ul,.obs-section ol{padding-left:22px}
.obs-section li{margin:8px 0}
.obs-section strong{color:#071a34}
.obs-deck{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:0 0 42px}
.obs-stat{min-height:150px;padding:20px;border:1px solid var(--obs-line);border-radius:17px;background:#fff;box-shadow:0 8px 24px rgba(15,35,63,.05)}
.obs-stat strong{display:block;margin:7px 0 6px;font-size:clamp(28px,3vw,39px);line-height:1;color:var(--obs-indigo-dark);letter-spacing:-.04em}
.obs-stat span{display:block;color:#52677f;font-size:13px;line-height:1.45}
.obs-stat .obs-stat-label{color:#667891;font-size:11px;font-weight:850;letter-spacing:.055em;text-transform:uppercase}
.obs-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.obs-card{display:flex;flex-direction:column;min-height:100%;padding:23px;border:1px solid var(--obs-line);border-radius:var(--obs-radius);background:#fff;box-shadow:0 10px 30px rgba(15,35,63,.055);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.obs-card:hover{transform:translateY(-2px);border-color:#bcc9dc;box-shadow:var(--obs-shadow)}
.obs-card .obs-card-tag{align-self:flex-start;margin-bottom:12px;padding:4px 9px;border-radius:999px;background:#eef0ff;color:var(--obs-indigo-dark);font-size:11px;font-weight:850;text-transform:uppercase;letter-spacing:.05em}
.obs-card h3{margin:0 0 10px;font-size:21px;line-height:1.25;letter-spacing:-.015em}
.obs-card p{margin:0 0 17px;color:#52677f;font-size:14px;flex:1}
.obs-card a{font-weight:850;text-decoration:none}
.obs-card-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:auto;color:#75859a;font-size:12px}
.obs-note{margin:20px 0;padding:18px 20px;border-radius:14px;border:1px solid #d4deeb;background:#fff;color:#3f536b}
.obs-note strong:first-child{display:block;margin-bottom:4px}
.obs-note--warning{border-color:#f0d79a;background:#fffaf0;color:#674c11}
.obs-note--critical{border-color:#efc2bd;background:#fff7f6;color:#75261e}
.obs-note--source{border-left:4px solid var(--obs-indigo);background:#f7f7ff}
.obs-table-wrap{overflow:auto;margin:20px 0 13px;border:1px solid var(--obs-line);border-radius:15px;background:#fff;box-shadow:0 8px 24px rgba(15,35,63,.04)}
.obs-table{width:100%;border-collapse:collapse;min-width:690px;font-size:14px}
.obs-table th{position:sticky;top:0;padding:12px 14px;text-align:left;color:#52677f;background:#f1f5f9;border-bottom:1px solid var(--obs-line);font-size:11px;text-transform:uppercase;letter-spacing:.05em;white-space:nowrap}
.obs-table td{padding:12px 14px;border-bottom:1px solid #edf1f6;vertical-align:top}
.obs-table tbody tr:last-child td{border-bottom:0}
.obs-table tbody tr:hover{background:#fafbff}
.obs-table td[data-number]{font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}
.obs-table th[data-number]{text-align:right}
.obs-table .obs-highlight{background:#f0fdf8;font-weight:800}
.obs-caption{margin:-2px 0 20px;color:#6b7c93;font-size:12px}
.obs-source-list{display:grid;gap:13px;margin:18px 0 0;padding:0;list-style:none}
.obs-source{padding:17px 19px;border:1px solid var(--obs-line);border-radius:14px;background:#fff}
.obs-source strong{display:block;margin-bottom:4px}
.obs-source p{margin:6px 0 0;color:#61738a;font-size:13px}
.obs-source a{word-break:break-word}
.obs-definition-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}
.obs-definition{padding:18px;border:1px solid var(--obs-line);border-radius:15px;background:#fff}
.obs-definition dt{font-weight:900;color:var(--obs-indigo-dark)}
.obs-definition dd{margin:5px 0 0;color:#52677f;font-size:14px}
.obs-steps{counter-reset:obs-step;display:grid;gap:13px;margin:20px 0}
.obs-step{counter-increment:obs-step;display:grid;grid-template-columns:38px 1fr;gap:14px;align-items:start;padding:18px;border:1px solid var(--obs-line);border-radius:14px;background:#fff}
.obs-step::before{content:counter(obs-step);display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--obs-ink);color:#fff;font-weight:900}
.obs-step h3{margin:0 0 4px;font-size:18px}
.obs-step p{margin:0;color:#52677f;font-size:14px}
.obs-downloads{display:flex;flex-wrap:wrap;gap:11px;margin:18px 0}
.obs-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 15px;border:1px solid var(--obs-indigo);border-radius:11px;background:var(--obs-indigo);color:#fff;font-weight:850;text-decoration:none}
.obs-button:hover{background:var(--obs-indigo-dark);color:#fff}
.obs-button--ghost{background:#fff;color:var(--obs-indigo-dark)}
.obs-button--ghost:hover{background:#eef0ff;color:var(--obs-indigo-dark)}
.obs-filters{display:grid;grid-template-columns:1fr 220px;gap:12px;margin:18px 0}
.obs-input,.obs-select{width:100%;padding:11px 13px;border:1px solid #becbdd;border-radius:11px;background:#fff;color:var(--obs-ink);font:inherit}
.obs-input:focus,.obs-select:focus{outline:3px solid rgba(79,70,229,.16);border-color:var(--obs-indigo)}
.obs-result-count{margin:8px 0 12px;color:#657890;font-size:13px;font-weight:750}
.obs-faq details{margin:10px 0;border:1px solid var(--obs-line);border-radius:13px;background:#fff}
.obs-faq summary{cursor:pointer;padding:16px 18px;font-weight:850;line-height:1.4}
.obs-faq details p{padding:0 18px 17px;margin:0;color:#52677f}
.obs-citation{padding:18px 20px;border:1px dashed #a8b7cb;border-radius:14px;background:#fff;font-size:14px;color:#425970}
.obs-citation code{white-space:normal;word-break:break-word;color:#263d59;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px}
.obs-related{padding:35px 0 68px;border-top:1px solid var(--obs-line);background:#fff}
.obs-related h2{margin:0 0 18px;font-size:28px;letter-spacing:-.02em}
.obs-footer{padding:33px 0 38px;color:#bdc8d8;background:#0d2038;font-size:13px}
.obs-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.obs-footer strong{color:#fff}
.obs-footer a{color:#e1e8f2}
.obs-footer ul{list-style:none;padding:0;margin:8px 0 0}
.obs-footer li{margin:6px 0}
.obs-footer-note{margin-top:24px;padding-top:18px;border-top:1px solid rgba(255,255,255,.13)}
.obs-visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
[hidden]{display:none!important}
@media(max-width:980px){.obs-layout{grid-template-columns:1fr}.obs-aside{display:none}.obs-deck{grid-template-columns:repeat(2,minmax(0,1fr))}.obs-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.obs-site-header{position:static}.obs-header-inner{align-items:flex-start}.obs-nav{justify-content:flex-end;gap:10px}.obs-nav a:not(.obs-nav-cta){display:none}.obs-hero{padding:39px 0 30px}.obs-wrap{padding:0 17px}.obs-main{padding-top:29px}.obs-grid,.obs-definition-grid,.obs-footer-grid{grid-template-columns:1fr}.obs-filters{grid-template-columns:1fr}.obs-hero h1{font-size:40px}.obs-answer{padding:20px}.obs-table{min-width:610px}}
@media(max-width:520px){.obs-brand small{display:none}.obs-deck{grid-template-columns:1fr}.obs-stat{min-height:auto}.obs-header-inner{padding:11px 16px}.obs-nav .obs-nav-cta{font-size:12px}.obs-hero h1{font-size:35px}.obs-section h2{font-size:28px}.obs-button{width:100%}}
@media print{.obs-site-header,.obs-aside,.obs-related,.obs-footer,.obs-downloads,.obs-filters{display:none!important}.obs-hero{padding:20px 0}.obs-main{padding:20px 0}.obs-layout{display:block}.obs-card,.obs-stat,.obs-note,.obs-source{box-shadow:none;break-inside:avoid}body{background:#fff;color:#111}.obs-wrap{max-width:none}}


/* v1.1: trazabilidad, navegación móvil y accesibilidad */
.obs-hero-links{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:15px;font-size:13px;font-weight:800}
.obs-hero-links a{text-decoration:none}
.obs-stat-source{display:inline-block;margin-top:12px;color:#61738a!important;font-size:11px!important;font-weight:800;text-decoration:none}
.obs-stat-source:hover{color:var(--obs-indigo)!important;text-decoration:underline}
.obs-mobile-toc{display:none;margin:0 0 28px;border:1px solid var(--obs-line);border-radius:14px;background:#fff}
.obs-mobile-toc summary{cursor:pointer;padding:14px 16px;font-weight:900}
.obs-mobile-toc nav{padding:0 16px 14px}
.obs-mobile-toc ul{margin:0;padding-left:19px}
.obs-mobile-toc li{margin:7px 0}
.obs-mobile-toc a{text-decoration:none;font-weight:720}
.obs-copy-citation{margin-top:12px;padding:7px 10px;border:1px solid #becbdd;border-radius:9px;background:#f8fafc;color:var(--obs-ink-soft);font:inherit;font-size:12px;font-weight:800;cursor:pointer}
.obs-copy-citation:hover{background:#eef2f7}
:where(a,button,input,select,summary):focus-visible{outline:3px solid rgba(79,70,229,.28);outline-offset:3px}
[data-observation-row]{scroll-margin-top:90px}
[data-observation-row]:target{background:#fff8d8}
@media(max-width:980px){.obs-mobile-toc{display:block}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.obs-card{transition:none}}