/* GOAT Path Science Discovery. Scoped styles; inherits every active theme. */
.sci-screen{width:100%;max-width:960px;margin:0 auto;padding:0 0 100px}
.sci-filterbar{display:grid;grid-template-columns:minmax(0,1fr) 44px;align-items:stretch;gap:7px;margin-bottom:10px}
.sci-categories{min-width:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}
.sci-categories button{width:100%;min-width:0;min-height:44px;border:1px solid var(--line);color:var(--mut);border-radius:12px;background:var(--glass2);padding:8px 2px;font:700 clamp(10px,2.7vw,12px) var(--body);white-space:nowrap;cursor:pointer}
.sci-categories button.on{border-color:var(--acc);background:var(--accT08);color:var(--ink)}
.sci-sort{position:relative;min-width:0}
.sci-sort summary{display:grid;place-items:center;width:44px;height:44px;list-style:none;border:1px solid var(--line);border-radius:12px;background:var(--glass2);color:var(--ink);cursor:pointer}
.sci-sort summary::-webkit-details-marker{display:none}
.sci-sort-icon{display:block;width:22px;height:22px;stroke-width:2.3}
.sci-sort[open] summary{border-color:var(--acc);background:var(--accT08)}
.sci-sort summary:focus-visible,.sci-categories button:focus-visible,.sci-sort-option:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.sci-sort-menu{position:absolute;right:0;top:calc(100% + 7px);z-index:30;width:min(210px,calc(100vw - 36px));padding:6px;border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:var(--shadow)}
.sci-sort-option{display:flex;justify-content:space-between;align-items:center;gap:10px;width:100%;min-height:40px;padding:9px 10px;border:0;border-radius:9px;background:transparent;color:var(--ink);font:650 12px var(--body);text-align:left;cursor:pointer}
.sci-sort-option[aria-pressed="true"],.sci-sort-option:hover{background:var(--soft2)}
.sci-sort-option[aria-pressed="true"] span:last-child{color:var(--acc2)}
.sci-tools{margin-bottom:18px}
.sci-tools input{display:block;width:100%;height:44px;min-width:0;border:1px solid var(--line);border-radius:11px;background:var(--surface);color:var(--ink);font:500 12px var(--body);padding:8px 12px}
.sci-tools input:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.sci-feed{max-width:710px;margin:0 auto;display:grid;gap:20px}
.sci-story{--sci-paint:var(--acc2);position:relative;isolation:isolate;scroll-margin-top:12px;min-height:0;border-radius:26px;border:1px solid var(--line);padding:clamp(22px,4.3vw,42px);background:var(--glass2);box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;align-items:flex-start}
.sci-story.sci-diet{--sci-paint:var(--eng)}
.sci-story.sci-exercise{--sci-paint:var(--acc2)}
.sci-story.sci-body{--sci-paint:var(--acc)}
.sci-story::before{content:"";position:absolute;right:-140px;top:-170px;width:390px;height:390px;border-radius:50%;background:radial-gradient(circle,var(--accT08),transparent 71%);pointer-events:none;z-index:-1}
.sci-story-top{width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;font:700 10px var(--mono);letter-spacing:.06em;color:var(--mut)}
.sci-kicker{text-transform:uppercase;color:var(--sci-paint)}
.sci-progress{font-variant-numeric:tabular-nums}
.sci-story h2{font:750 clamp(24px,4.9vw,38px)/1.13 var(--disp);letter-spacing:-.04em;max-width:590px;overflow-wrap:anywhere}
/* Scroll-first Science: 170 concise, non-interactive stories and an R# library teleport. */
.sci-story.sci-story-flow{min-height:clamp(450px,calc(100svh - 230px),750px);padding:clamp(23px,4.3vw,36px);gap:0;justify-content:center;scroll-snap-align:start}
.sci-story-flow .sci-story-top{margin-bottom:22px}
.sci-story-flow .sci-kicker{font:750 11px var(--body);letter-spacing:.09em}
.sci-story-flow h2{max-width:570px}
.sci-flow-hook{color:var(--ink);max-width:56ch;margin:0}
.sci-flow-finding{font:450 clamp(14px,2vw,16px)/1.65 var(--body);color:var(--mut);max-width:66ch;margin:18px 0 0}
.sci-flow-takeaway{border-top:1px solid var(--line);padding:16px 0 0;margin:19px 0 0;font:650 clamp(14px,2vw,16px)/1.55 var(--body);color:var(--ink);max-width:66ch}
.sci-flow-footer{align-self:stretch;display:flex;justify-content:flex-end;margin-top:16px}
.sci-flow-source,.sci-flow-ref{color:var(--mut);font:700 11px var(--mono);text-decoration:none;letter-spacing:.03em}
.sci-flow-source span{font:750 14px var(--body)}
.sci-flow-source:hover{color:var(--acc2)}
.sci-flow-source:focus-visible{outline:2px solid var(--acc);outline-offset:5px;border-radius:2px}
.sci-feed-bottom{height:8px}
.sci-more{display:block;width:min(100%,710px);margin:8px auto 0;padding:14px;border:1px solid var(--line);background:var(--glass2);border-radius:12px;color:var(--ink);font:700 12px var(--body);cursor:pointer}
.sci-more[hidden],.sci-feed-bottom[hidden]{display:none}
.sci-library{border:1px solid var(--line);border-radius:20px;background:var(--glass2);overflow:hidden;max-width:760px;margin:0 auto}
.sci-library-item{display:flex;align-items:flex-start;gap:14px;scroll-margin-top:20px;border-bottom:1px solid var(--line);padding:17px;color:var(--ink)}
.sci-library-item:last-child{border-bottom:0}
.sci-library-item:focus-visible{outline:2px solid var(--acc);outline-offset:-3px;border-radius:3px;background:var(--accT07)}
.sci-library-id{font:700 11px var(--mono);color:var(--acc2);flex:0 0 38px}
.sci-library-copy{flex:1;min-width:0;display:flex;flex-direction:column;gap:5px}
.sci-library-copy b{font:650 13px/1.4 var(--body)}
.sci-library-copy small{font:500 11px var(--body);color:var(--mut)}
.sci-library-citation{margin:7px 0 0;color:var(--mut);font:450 12px/1.65 var(--body);white-space:normal;overflow-wrap:anywhere}
.sci-empty{border:1px dashed var(--line);border-radius:17px;padding:30px;text-align:center;color:var(--mut)}
@media(max-width:610px){
 .sci-screen{padding-bottom:85px}
 .sci-story{min-height:0;border-radius:22px;padding:24px 20px}
 .sci-story.sci-story-flow{min-height:clamp(420px,calc(100svh - 225px),650px);padding:24px 20px}
 .sci-story-flow h2.sci-flow-hook{font-size:clamp(24px,6.7vw,31px);line-height:1.25;margin-top:0}
 .sci-flow-finding{font-size:14px;line-height:1.65}
 .sci-flow-takeaway{font-size:14px}
 .sci-story h2{font-size:clamp(25px,7.2vw,33px)}
 .sci-categories button{padding:8px 1px}
}
/* GOAT Snake: fullscreen science-backed playfield. The stage owns all available
   height; JS fits square SVG cells inside the stage without reshaping saved runs. */
html.snake-playing{overscroll-behavior:none}
@media(max-width:1023px){html.snake-playing .tabbar{display:none}}
.snake-entry{width:44px;min-width:44px;height:44px;border:1px solid #dce1e7;border-radius:14px;background:#fff;color:#101820;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 1px 2px rgba(0,0,0,.05)}
/* Same compact top-right utility treatment as the shared three-dot control. */
.mtop-snake-slot{display:inline-flex;flex:none;align-items:center}
.mtop-snake-slot:empty{display:none}
/* Align the Science launch control with the 32px-high AI chip, preserving
   a 44px invisible tap area. Do not resize the in-game toolbar. */
.mtop-snake-slot .snake-entry{position:relative;width:34px;min-width:34px;height:32px;border-radius:10px;border-color:var(--line);background:var(--surface);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.04)}
.mtop-snake-slot .snake-entry::after{content:"";position:absolute;inset:-6px -4px}
.mtop-snake-slot .snake-launch-mark{width:21px;height:21px;color:currentColor}
html[data-theme="dark"] .mtop-snake-slot .snake-entry{background:var(--surface);border-color:var(--line);color:var(--ink);box-shadow:none}
.snake-launch-mark{width:32px;height:32px;display:block;color:#101820}
.snake-screen{position:fixed;inset:0;z-index:45;width:100vw;max-width:none;height:100dvh;margin:0;padding:max(9px,env(safe-area-inset-top)) 12px max(10px,env(safe-area-inset-bottom));background:var(--bg);overflow:hidden;overscroll-behavior:contain}
.snake-game{width:100%;max-width:1100px;height:100%;min-height:0;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:7px}
.snake-heading{width:100%;display:flex;align-items:center;gap:9px;min-height:44px;flex:none}
.snake-eyebrow{font:750 11px/1.1 var(--mono);letter-spacing:.08em;color:var(--ink);white-space:nowrap;flex:1 1 auto;min-width:0}
.snake-stats{display:flex;align-items:center;gap:10px;text-align:center;flex:none}
.snake-stats b{display:block;font:750 17px/1 var(--disp);font-variant-numeric:tabular-nums;letter-spacing:-.035em}
.snake-stats small{display:block;font:600 9px var(--body);color:var(--mut);margin-top:3px}
.snake-toolbar{display:flex;align-items:center;gap:5px;flex:none}
.snake-tool{display:grid;place-items:center;width:40px;height:42px;min-width:0;flex:none;background:#fff;color:#101820;border:1px solid #dce1e7;border-radius:13px;cursor:pointer;box-shadow:0 2px 0 #e3e6ec}
.snake-tool svg{display:block;width:21px;height:21px}
.snake-tool:active{transform:translateY(1px);box-shadow:none}
.snake-tool:disabled{opacity:.55;cursor:default}
.snake-tool-exit{color:#14191f}
.snake-stage{position:relative;display:flex;align-items:center;justify-content:center;flex:1 1 0;min-height:0;width:100%;overflow:hidden}
.snake-arena{--snake-body:var(--ink);position:relative;flex:none;aspect-ratio:var(--snake-board-ratio);max-width:100%;max-height:100%;overflow:hidden;border:2px solid var(--ink);border-radius:22px;background:var(--surface);box-shadow:var(--shadow);isolation:isolate;touch-action:auto}
.snake-arena.is-running{touch-action:pinch-zoom;user-select:none;-webkit-user-select:none}
.snake-arena:focus-visible,.snake-game button:focus-visible,.snake-entry:focus-visible{outline:3px solid var(--acc2);outline-offset:3px}
.snake-research{position:absolute;inset:0;z-index:1;background:var(--surface);opacity:.88;transition:opacity .25s ease}
.snake-arena.is-running .snake-research{opacity:.63;pointer-events:none}
.snake-arena.is-running::after{content:"";position:absolute;inset:0;z-index:2;background:var(--surface);opacity:.08;pointer-events:none}
.snake-grid{position:absolute;inset:0;width:100%;height:100%;z-index:3;pointer-events:none;overflow:hidden;opacity:1}
.snake-segment{fill:var(--snake-body);stroke:var(--surface);stroke-width:.095}
.snake-head{fill:var(--acc2);stroke:var(--ink);stroke-width:.095}
.snake-food{fill:var(--bad);stroke:var(--ink);stroke-width:.065}
.snake-food-halo{fill:var(--bad);opacity:.19}
.snake-card{position:absolute;inset:0;animation:snake-story-in .46s cubic-bezier(.2,.75,.25,1) both;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;background:var(--surface)}
.snake-card-out{animation:snake-story-out .46s ease both;pointer-events:none}
.snake-arena.is-running .snake-card{pointer-events:none;overflow:hidden}
.snake-card .sci-story.sci-story-flow{border:0;min-height:100%;width:100%;max-width:540px;margin:0 auto;border-radius:0;box-shadow:none;padding:22px 20px;background:transparent;justify-content:center}
.snake-card .sci-story-top{margin-bottom:18px;font-size:9px}
.snake-card .sci-progress{display:none}
.snake-card .sci-story-flow h2.sci-flow-hook{font-size:clamp(20px,5vw,27px);line-height:1.17;margin:0;letter-spacing:-.035em}
.snake-card .sci-flow-finding{font-size:13px;line-height:1.55;margin-top:15px;color:var(--mut)}
.snake-card .sci-flow-takeaway{font-size:13px;line-height:1.5;padding-top:13px;margin-top:14px}
.snake-card .sci-flow-footer{margin-top:12px}
.snake-welcome{display:flex;flex-direction:column;align-items:center;justify-content:center;position:absolute;inset:0;z-index:4;padding:28px;text-align:center;background:var(--surface)}
.snake-welcome .tmark{width:48px;height:48px;margin-bottom:16px}
.snake-welcome h3{font:750 22px var(--disp);letter-spacing:.08em;margin:0 0 10px}
.snake-welcome p{font:450 14px/1.65 var(--body);color:var(--mut);max-width:26ch;margin:0}
.snake-dpad{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:repeat(2,48px);width:min(100%,560px);justify-content:center;gap:5px;margin:2px 0 1px;flex:none}
.snake-dpad button{height:48px;min-width:0;border:1px solid #dce1e7;border-bottom:3px solid #dce1e7;border-radius:11px;color:#101820;background:#fff;font:650 23px var(--body);cursor:pointer;touch-action:manipulation;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.snake-dpad button:disabled{opacity:1;color:#8e98a2;background:#fff}
.snake-dpad button:active{transform:translateY(2px);border-bottom-width:1px;background:#fff}
.snake-dpad [data-snake-dir="up"]{grid-column:2;grid-row:1}
.snake-dpad [data-snake-dir="left"]{grid-column:1;grid-row:2}
.snake-dpad [data-snake-dir="down"]{grid-column:2;grid-row:2}
.snake-dpad [data-snake-dir="right"]{grid-column:3;grid-row:2}
/* Match the main Analysis mark: dark keys in dark mode, white keys in light. */
html[data-theme="dark"] .snake-entry,
html[data-theme="dark"] .snake-tool,
html[data-theme="dark"] .snake-dpad button{background:#0C1116;color:#FFFFFF;border-color:#2B3540;box-shadow:0 2px 0 #202A34}
html[data-theme="dark"] .snake-launch-mark{color:#FFFFFF}
html[data-theme="dark"] .snake-tool-exit{color:#FFFFFF}
html[data-theme="dark"] .snake-dpad button:disabled{background:#0C1116;color:#A6B0BC;border-color:#2B3540}
html[data-theme="dark"] .snake-dpad button:active{background:#19222C}
.snake-result{font:600 11px/1.3 var(--body);color:var(--mut);text-align:center;flex:none}
.snake-save{font:500 11px/1.4 var(--body);color:var(--mut);text-align:center;max-width:45ch;margin:0 auto;flex:none}
.snake-save:empty{display:none}
.snake-confirm-scrim{position:absolute;inset:0;z-index:12;background:rgba(12,18,26,.38);display:grid;place-items:center;padding:20px}
.snake-confirm{width:min(100%,340px);padding:22px;border-radius:21px;background:var(--surface);color:var(--ink);box-shadow:0 20px 55px rgba(0,0,0,.23);border:1px solid var(--line)}
.snake-confirm h3{font:750 19px/1.25 var(--disp);margin:0 0 9px}
.snake-confirm p{font:450 13px/1.55 var(--body);color:var(--mut);margin:0 0 20px}
.snake-confirm-actions{display:flex;gap:9px;justify-content:flex-end}
.snake-confirm-actions button{min-height:42px;border-radius:12px;border:1px solid var(--line);padding:10px 15px;background:var(--surface);color:var(--ink);font:700 13px var(--body);cursor:pointer}
.snake-confirm-actions .snake-confirm-accept{background:var(--ink);border-color:var(--ink);color:var(--surface)}
@keyframes snake-story-in{from{opacity:0;filter:blur(4px);transform:translateY(3px)}to{opacity:1;filter:blur(0);transform:translateY(0)}}
@keyframes snake-story-out{from{opacity:1;filter:blur(0)}to{opacity:0;filter:blur(3px)}}
@media(min-width:1024px){.snake-screen{left:var(--rail);width:auto;padding:16px 22px}.snake-heading{min-height:48px}.snake-arena{border-radius:24px}}
@media(max-width:390px){.snake-heading{gap:5px}.snake-eyebrow{font-size:10px;letter-spacing:.025em}.snake-stats{gap:5px}.snake-stats b{font-size:15px}.snake-stats small{font-size:8px}.snake-toolbar{gap:4px}.snake-tool{width:35px;height:38px;border-radius:10px}.snake-tool svg{width:19px;height:19px}}
@media(max-height:520px){.snake-game{min-height:0}.snake-stage{min-height:0}.snake-dpad{grid-template-rows:repeat(2,39px)}.snake-dpad button{height:39px}}
@media(prefers-reduced-motion:reduce){.snake-card,.snake-card-out{animation:none}.snake-card-out{visibility:hidden}.snake-dpad button:active,.snake-tool:active{transform:none}.snake-research{transition:none}}