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/* Theme palettes share the same readable layout and original photographs. */
:root{color-scheme:light;--surface:#fff;--footer:#f3f7f4;--muted:#526b60;--control-border:#a7bcb2;--button-bg:#153e36;--button-text:#fff;--hover:#f5faf7;--focus:#a87700}
:root[data-theme="dark"]{color-scheme:dark;--surface:#14221e;--footer:#101b17;--ink:#e2f4eb;--text:#d0ded7;--mint:#203b31;--accent:#8edbbb;--rule:#415c4f;--muted:#acc2b5;--control-border:#6b8778;--button-bg:#9ddfc2;--button-text:#10291e;--hover:#243d32;--focus:#f0c75e}
:root[data-theme="legacy"]{color-scheme:light;--surface:#fffef5;--footer:#a6e5d4;--ink:#075e47;--text:#233b30;--mint:#a6e5d4;--accent:#006b38;--rule:#a8cbbb;--muted:#446453;--control-border:#6f9c88;--button-bg:#006b38;--button-text:#fff;--hover:#f0efe1;--focus:#935d00}
body,header{background:var(--surface)}footer{background:var(--footer)}input,select{background:var(--surface);border-color:var(--control-border)}button{background:var(--button-bg);color:var(--button-text)}.secondary{background:var(--surface);color:var(--ink);border-color:var(--control-border)}.skip{background:var(--surface)}.stat{border-color:var(--rule)}.scientists .rank,.ranking-table td:first-child,#search-status,.lives:before,.ranking-table td:last-child:before{color:var(--muted)}.ranking-table tr:hover{background:var(--hover)}input::placeholder{color:var(--muted);opacity:1}:focus-visible{outline-color:var(--focus)}
.theme-control{display:inline-flex;align-items:center;gap:7px;white-space:nowrap;font-size:12px;font-weight:500;color:var(--text)}.theme-control select{width:auto;margin:0;padding:7px 9px;font-size:13px}.header-inner{flex-wrap:wrap;gap:12px 20px;padding-block:14px}.header-inner #navigation{margin-left:auto;gap:15px}.theme-control{margin-left:auto}
:root[data-theme="legacy"] .scientists tbody tr:nth-child(even){background:#f0efe1}
/* Book: the cover's teal field, white paper, and yellow banner. */
:root[data-theme="book"]{color-scheme:light;--surface:#fffef8;--footer:#f8f1d6;--ink:#075b58;--text:#263e3b;--mint:#087f7c;--accent:#00635f;--rule:#c7dcd4;--muted:#506963;--control-border:#75968b;--button-bg:#00635f;--button-text:#fffef8;--hover:#fff3bf;--focus:#976700}
:root[data-theme="book"] .hero{--ink:#fffef8;--text:#fffef8;--accent:#ffe367;--rule:#66aaa0;--focus:#ffe367;color:var(--text);background:linear-gradient(177deg,#087f7c 0%,#087f7c 92%,#f8d749 92%,#f8d749 100%)}
:root[data-theme="book"] .scientists tbody tr:nth-child(even){background:#f5f6e9}
:root[data-theme="book"] footer{border-top:5px solid #f8d749}
/* Red: cranberry sampled from saturated liquid pixels in the original beaker. */
:root[data-theme="red"]{color-scheme:light;--surface:#fffaf9;--footer:#f8e8eb;--ink:#511e2c;--text:#492f36;--mint:#c03a4c;--accent:#a1253d;--rule:#e5c8ce;--muted:#76545f;--control-border:#a37986;--button-bg:#a1253d;--button-text:#fff;--hover:#fce8ed;--focus:#a1253d}
:root[data-theme="red"] .hero{--ink:#fffaf5;--text:#fffaf5;--accent:#fff0cc;--rule:#e899a6;--focus:#ffe1a1;color:var(--text)}
:root[data-theme="red"] .scientists tbody tr:nth-child(even){background:#fceef0}
:root[data-theme="red"] footer{border-top:5px solid #c03a4c}
/* Prism: saturated cyan, lime, and gold with deep navy lettering. */
:root[data-theme="prism"]{color-scheme:light;--surface:#fffef7;--footer:#e7f4f7;--ink:#153e59;--text:#2c4553;--mint:#48ccec;--accent:#075985;--rule:#c6dce0;--muted:#506974;--control-border:#7999a8;--button-bg:#075985;--button-text:#fff;--hover:#fff4b8;--focus:#155e88}
:root[data-theme="prism"] .hero{background:linear-gradient(115deg,#48ccec 0%,#bce95b 52%,#ffd34e 100%);border-bottom:7px solid #087daf}
:root[data-theme="prism"] .scientists tbody tr:nth-child(3n+1){background:#e0f5ff}
:root[data-theme="prism"] .scientists tbody tr:nth-child(3n+2){background:#fff0b6}
:root[data-theme="prism"] .scientists tbody tr:nth-child(3n){background:#eaf7cb}
:root[data-theme="prism"] footer{background:linear-gradient(115deg,#9ce3f5,#d3ef92,#ffe494)}
@media(max-width:640px){.header-inner{padding-block:15px;gap:12px}.header-inner .menu-button{margin-left:auto}.theme-control{order:3;width:100%;justify-content:flex-end}.header-inner #navigation{order:4;margin:0}.theme-control select{min-height:40px;min-width:110px}}