:root{--color-bg: #f5f5f7;--color-surface: #ffffff;--color-text: #1d1d1f;--color-muted: #6e6e73;--color-primary: #0071e3;--color-primary-dark: #005bb5;--color-on-primary: #ffffff;--color-accent: #c8a23a;--color-compra: #1e5799;--color-border: rgba(0, 0, 0, .08);--color-success-bg: #eaf7ef;--color-success-text: #176b3a;--font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-heading: var(--font-sans);--fs-sm: .875rem;--fs-base: 1rem;--fs-lg: 1.125rem;--fs-h1: clamp(2rem, 1.2rem + 3vw, 3rem);--fs-h2: clamp(1.4rem, 1.1rem + 1.2vw, 1.8rem);--fs-h3: 1.2rem;--lh-base: 1.65;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-6: 1.5rem;--space-8: 2rem;--space-12: 3rem;--radius: 18px;--radius-sm: 10px;--radius-pill: 999px;--maxw: 72rem;--content-w: 46rem;--shadow: 0 12px 30px rgba(0, 0, 0, .06)}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:var(--font-sans);font-size:var(--fs-base);line-height:var(--lh-base);color:var(--color-text);background:var(--color-bg);display:flex;flex-direction:column;min-height:100vh}h1,h2,h3{font-family:var(--font-heading);line-height:1.25;color:var(--color-text)}h1{font-size:var(--fs-h1)}h2{font-size:var(--fs-h2)}h3{font-size:var(--fs-h3)}p{margin:0 0 var(--space-4)}a{color:var(--color-primary)}a:hover{color:var(--color-primary-dark)}.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--space-4)}.prose{max-width:var(--content-w)}.prose h2{margin-top:var(--space-8)}.prose ul,.prose ol{padding-left:1.25rem}.prose li{margin-bottom:var(--space-2)}.prose figure{margin:var(--space-6) 0}.prose img{display:block;max-width:100%;height:auto;border-radius:var(--radius-sm);border:1px solid var(--color-border)}.prose figcaption{margin-top:var(--space-2);color:var(--color-muted);font-size:var(--fs-sm);line-height:1.5}.prose table{width:100%;border-collapse:collapse;margin:var(--space-6) 0;overflow-wrap:anywhere;font-size:var(--fs-sm);background:var(--color-surface);border:1px solid var(--color-border)}.prose th,.prose td{padding:var(--space-2) var(--space-3);border-bottom:1px solid var(--color-border);text-align:left;vertical-align:top}.prose th{font-weight:700;background:#00000008}.prose td:last-child,.prose th:last-child{text-align:right}.note-box{padding:var(--space-4);border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface)}.note-box{color:var(--color-muted);font-size:var(--fs-sm)}.periodic-artifact{width:min(92vw,68rem);margin:var(--space-8) 0 var(--space-8) 50%;transform:translate(-50%);padding:var(--space-4);border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface)}.periodic-controls{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--space-3);margin-bottom:var(--space-4)}.periodic-controls label{display:grid;gap:var(--space-1);color:var(--color-muted);font-size:var(--fs-sm);font-weight:600}.periodic-controls select{min-height:2.75rem;width:100%;padding:0 var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-bg);color:var(--color-text);font:inherit}.periodic-summary{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--space-2);margin-bottom:var(--space-4)}.periodic-summary div{min-width:0;padding:var(--space-3);border-radius:var(--radius-sm);background:var(--color-bg)}.periodic-summary span{display:block;color:var(--color-muted);font-size:.78rem;line-height:1.3}.periodic-summary 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var(--color-border);border-radius:6px;background:var(--color-surface);color:var(--color-text);text-align:center;cursor:pointer;transition:transform .16s ease,opacity .16s ease,border-color .16s 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small{display:block;margin-top:2px;padding-top:2px;border-top:2px dashed #b58b00;color:#6d5600;font-size:.54rem;line-height:1}.periodic-matrix-name{display:grid;grid-template-columns:auto 1fr;gap:1px 5px;align-content:center;min-height:3rem;background:var(--color-surface);border:1px solid var(--color-border)}.periodic-matrix-name strong{grid-row:span 2;color:var(--color-muted)}.periodic-matrix-name span,.periodic-matrix-name small{min-width:0;overflow-wrap:anywhere}.periodic-matrix-name small{color:var(--color-muted);font-size:.6rem;font-weight:500}.periodic-matrix .periodic-cell{min-height:3rem}.periodic-matrix .periodic-cell strong,.periodic-matrix .periodic-cell span{display:none}@media(max-width:760px){.periodic-controls{grid-template-columns:1fr}.periodic-summary{grid-template-columns:repeat(2,minmax(0,1fr))}.periodic-artifact{width:calc(100vw - 2rem);padding:var(--space-3)}.periodic-ranked{grid-template-columns:repeat(5,minmax(0,1fr))}.periodic-matrix{grid-template-columns:minmax(5.2rem,1.4fr) repeat(15,minmax(0,.7fr))}.periodic-matrix-head,.periodic-matrix-year,.periodic-matrix-name,.periodic-cell{padding:3px 2px}.periodic-matrix-name small,.periodic-cell span,.periodic-cell strong{display:none}}.skip-link{position:absolute;left:-999px;top:0;background:var(--color-primary);color:var(--color-on-primary);padding:var(--space-2) var(--space-4);border-radius:var(--radius-sm);z-index:10}.skip-link:focus{left:var(--space-2);top:var(--space-2)}.site-header{background:#ffffffd9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid 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h3{font-size:var(--fs-h3);font-weight:700;margin-top:0;margin-bottom:var(--space-3);color:var(--color-text)}.card-featured p{color:var(--color-muted);flex:1;margin-bottom:var(--space-6)}.card-tag{display:inline-block;font-size:.72rem;font-weight:600;color:var(--color-primary);background:#0071e314;padding:2px var(--space-3);border-radius:var(--radius-pill);margin-bottom:var(--space-3);text-transform:uppercase;letter-spacing:.06em}.card-grid{list-style:none;margin:0;padding:0;display:grid;gap:var(--space-6);grid-template-columns:repeat(auto-fill,minmax(16rem,1fr))}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:var(--space-6);box-shadow:var(--shadow);display:flex;flex-direction:column}.card h3{margin-top:0;font-size:var(--fs-base);font-weight:700}.card p{color:var(--color-muted);font-size:var(--fs-sm);flex:1}.how-grid{display:grid;gap:var(--space-6);grid-template-columns:repeat(auto-fill,minmax(16rem,1fr))}.how-item{background:var(--color-surface);border-radius:var(--radius);padding:var(--space-6);border:1px solid var(--color-border)}.how-item h3{font-size:var(--fs-base);font-weight:700;margin-top:0;margin-bottom:var(--space-2);color:var(--color-text)}.how-item p{color:var(--color-muted);font-size:var(--fs-sm);margin:0}.trust-block{background:var(--color-surface);border-radius:var(--radius);padding:var(--space-8);border:1px solid var(--color-border)}.trust-block p{margin-bottom:var(--space-2)}.trust-block p:last-child{margin-bottom:0}.btn{display:inline-block;background:var(--color-primary);color:var(--color-on-primary);text-decoration:none;font-weight:600;font-size:var(--fs-sm);padding:var(--space-3) var(--space-6);border-radius:var(--radius-pill);border:none;cursor:pointer;text-align:center;transition:background .15s 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