/* Controles compartidos de apariencia y claves. Los colores de las figuras no se filtran. */
:root{--rui-ink:#152d32;--rui-muted:#536b6f;--rui-surface:#fff;--rui-line:#93b1a8;--rui-accent:#08766d;--rui-focus:#bd8918;--rui-fill:#08766d;--rui-fill-hover:#075e58;--rui-strong:#152d32;color-scheme:light}
html[data-robin-theme=dark]{--ink:#e5eff0;--muted:#b3c6c8;--teal:#83dfce;--teal-dark:#a2eadc;--line:#496166;--paper:#102329;--white:#fff;--lime:#293b25;--blue:#23364e;--orange:#f8c891;--rui-ink:#e5eff0;--rui-muted:#b3c6c8;--rui-surface:#1a3036;--rui-line:#587478;--rui-accent:#90e1d0;--rui-focus:#f1c567;--rui-fill:#08766d;--rui-fill-hover:#075e58;--rui-strong:#26484e;color-scheme:dark}
.robin-appearance{display:inline-flex;align-items:center;flex-wrap:nowrap;gap:3px;position:relative;flex:none;font:12px/1.3 Segoe UI,Arial,sans-serif;color:var(--rui-ink)}
.robin-appearance-label{margin-right:6px;font-size:12px;font-weight:600;color:var(--rui-muted)}
.robin-mode-button{display:inline-flex;align-items:center;justify-content:center;gap:5px;min-width:44px;min-height:44px;padding:8px;border:1px solid var(--rui-line);border-radius:9px;background:var(--rui-surface);color:var(--rui-ink);font:inherit;cursor:pointer;box-shadow:none;white-space:nowrap}
.robin-mode-button[aria-pressed=true]{background:var(--rui-fill);border-color:var(--rui-fill);color:#fff}
.robin-mode-button:hover{outline:1px solid var(--rui-accent);outline-offset:-3px}
.robin-mode-button:focus-visible,.robin-secret-toggle:focus-visible{outline:3px solid var(--rui-focus);outline-offset:2px}
.robin-mode-button svg{flex:none}
.robin-appearance-status:not(:empty){position:absolute;top:100%;right:0;z-index:50;min-width:210px;padding:9px;background:var(--rui-surface);color:var(--rui-ink);border:1px solid var(--rui-line);border-radius:8px;font-size:12px}
.robin-secret-field{position:relative;display:block;width:100%;min-width:0;color:var(--rui-ink)}
.robin-secret-field>input{width:100%;padding-right:58px!important;min-height:46px}
.robin-secret-toggle{position:absolute;right:4px;top:50%;transform:translateY(-50%);display:inline-flex;align-items:center;justify-content:center;width:44px;height:40px;min-height:40px;min-width:44px;padding:7px;border:0;border-radius:7px;background:transparent;color:var(--rui-accent);cursor:pointer;line-height:1;box-shadow:none;margin:0}
.robin-secret-toggle:hover{background:color-mix(in srgb,var(--rui-accent) 12%,transparent)}
.robin-secret-toggle:disabled{opacity:.5;cursor:wait}
.robin-secret-field>input::-ms-reveal{display:none}
.topbar>div{flex-wrap:wrap}
body>header{flex-wrap:wrap;gap:12px}
body>header>.robin-appearance{margin-left:auto;order:3}
/* El panel claro de las imágenes protege sus colores y el contraste de los diagramas. */
html[data-robin-theme=dark] .question-image,html[data-robin-theme=dark] .modern-diagram img,html[data-robin-theme=dark] .context-box img,html[data-robin-theme=dark] .image-viewer-stage{background:#fff}
html[data-robin-theme=dark] .scientific-figure{background:#fff;color:#152d32;border-radius:8px;padding:8px}
html[data-robin-theme=dark] .scientific-formula [fill="#203d40"]{fill:#e5eff0}
html[data-robin-theme=dark] .scientific-formula [stroke="#203d40"]{stroke:#e5eff0}
html[data-robin-theme=dark] .robin-brand img,html[data-robin-theme=dark] .seras-brand img,html[data-robin-theme=dark] .robin-presentation-logo{background:#fff;border-radius:8px;padding:4px;object-fit:contain}
html[data-robin-theme=dark] input,html[data-robin-theme=dark] select,html[data-robin-theme=dark] textarea{caret-color:#e5eff0}
html[data-robin-theme=dark] input:-webkit-autofill{-webkit-text-fill-color:#e5eff0;box-shadow:0 0 0 1000px #1a3036 inset}
@media(max-width:760px){.robin-appearance-label,.robin-mode-label{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.robin-mode-button{width:44px;padding:7px}.robin-appearance{gap:4px}.topbar>div{gap:8px;width:100%;justify-content:space-between}.topbar{align-items:center;flex-wrap:wrap;gap:6px}.topbar #breadcrumb{min-width:0;flex-basis:100%}body>header>.robin-appearance{margin-left:0}}
@media print{.robin-appearance,.robin-secret-toggle{display:none!important}html[data-robin-theme]{color-scheme:light}html[data-robin-theme=dark] .scientific-formula [fill="#203d40"]{fill:#203d40}html[data-robin-theme=dark] .scientific-formula [stroke="#203d40"]{stroke:#203d40}}

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@media 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