:root{color-scheme:light dark;--color-canvas:#fafbfc;--color-surface:#fff;--color-surface-muted:#eef1f4;--color-text:#0b1219;--color-text-muted:#55606b;--color-text-inverse:#fafbfc;--color-border:#dfe4e9;--color-border-strong:#6b7681;--color-accent:#a83410;--color-accent-strong:#86280b;--color-accent-soft:#fdeee7;--color-accent-contrast:#fff;--color-focus:#a83410;--color-error:#a3261a;--font-display:"Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Noto Serif JP", "Noto Serif CJK JP", serif;--font-body:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", "Noto Sans JP", Meiryo, sans-serif;--font-data:ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;--font-size-body:clamp(1rem, .96rem + .2vw, 1.0625rem);--font-size-data:clamp(.75rem, .72rem + .15vw, .8125rem);--line-height-body:1.85;--line-height-heading:1.3;--font-size-title:clamp(1.875rem, 1.5rem + 1.9vw, 2.875rem);--font-size-lead:clamp(1.125rem, 1.05rem + .4vw, 1.375rem);--font-size-section:clamp(1.375rem, 1.2rem + .8vw, 1.75rem);--font-size-card:clamp(1.125rem, 1.05rem + .35vw, 1.3125rem);--font-size-small:clamp(.875rem, .85rem + .12vw, .9375rem);--tracking-data:.08em;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--space-7:3rem;--space-8:4.5rem;--width-content:74rem;--width-reading:68ch;--rail:12rem;--gutter:clamp(1rem, 4vw, 2.5rem);--radius-small:2px;--radius-control:3px;--duration-fast:.12s;--duration-normal:.2s;--ease-standard:cubic-bezier(.2, 0, 0, 1)}@media (prefers-color-scheme:dark){:root{--color-canvas:#080c11;--color-surface:#0f151c;--color-surface-muted:#161e26;--color-text:#eef3f7;--color-text-muted:#93a3b3;--color-text-inverse:#080c11;--color-border:#232e39;--color-border-strong:#78899a;--color-accent:#ff7a45;--color-accent-strong:#ff9a70;--color-accent-soft:#24140d;--color-accent-contrast:#080c11;--color-focus:#ff7a45;--color-error:#ff8f7d}}@media (prefers-reduced-motion:reduce){:root{--duration-fast:.01ms;--duration-normal:.01ms}}*,:before,:after{box-sizing:border-box}html{color:var(--color-text);background-color:var(--color-canvas);font-family:var(--font-body);font-size:var(--font-size-body);line-height:var(--line-height-body);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{flex-direction:column;min-height:100dvh;margin:0;display:flex}main{flex:1 0 auto}img,svg,video{max-width:100%;height:auto;display:block}button,input,select,textarea{font:inherit}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:600;line-height:var(--line-height-heading);letter-spacing:.01em;line-break:strict;word-break:auto-phrase;margin-block:0 .5em}p{margin-block:0 1em}ul,ol{margin-block:0 1em;padding-inline-start:1.4em}a{color:var(--color-accent);text-underline-offset:.18em;text-decoration-thickness:from-font}a:hover{color:var(--color-accent-strong)}a:focus-visible{outline:3px solid var(--color-focus);outline-offset:2px;border-radius:var(--radius-small)}:is(h1,h2,h3,h4,h5,h6) a{color:var(--color-text);text-decoration:underline;text-decoration-color:var(--color-border-strong)}:is(h1,h2,h3,h4,h5,h6) a:hover{color:var(--color-accent);text-decoration-color:currentColor}::selection{background-color:var(--color-accent);color:var(--color-accent-contrast)}.data{font-family:var(--font-data);font-size:var(--font-size-data);letter-spacing:var(--tracking-data);font-variant-numeric:tabular-nums;font-weight:400}.data--label{color:var(--color-text-muted)}.skip-link{top:var(--space-2);left:var(--space-2);z-index:100;padding:var(--space-2) var(--space-3);background-color:var(--color-surface);color:var(--color-text);border:2px solid var(--color-focus);border-radius:var(--radius-small);transition:transform var(--duration-fast) var(--ease-standard);text-decoration:none;position:absolute;transform:translateY(-200%)}.skip-link:focus-visible{transform:translateY(0)}[hidden]{display:none!important}.visually-hidden{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.container{max-width:var(--width-content);padding-inline:var(--gutter);margin-inline:auto}.section{padding-block:clamp(var(--space-6), 4vw, var(--space-7))}.section--muted{padding-block:clamp(var(--space-5), 4vw, var(--space-7));background-color:var(--color-surface-muted)}.site-header{padding-block:var(--space-4);border-bottom:1px solid var(--color-border);background-color:var(--color-canvas)}.site-header__inner{justify-content:space-between;align-items:center;gap:var(--space-3) var(--space-6);flex-wrap:wrap;display:flex}.brand{align-items:stretch;gap:var(--space-3);border-inline-start:3px solid var(--color-accent);color:var(--color-text);padding-inline-start:var(--space-3);text-decoration:none;display:inline-flex}.brand:hover{color:var(--color-text)}.brand__name{font-family:var(--font-display);letter-spacing:.14em;align-self:center;font-size:clamp(1.375rem,1.2rem + .8vw,1.75rem);font-weight:600;line-height:1}.brand__sub{writing-mode:vertical-rl;font-family:var(--font-display);letter-spacing:.22em;color:var(--color-text-muted);font-size:clamp(.6875rem,.66rem + .12vw,.8125rem);font-weight:600;line-height:1}.site-header__navigation{align-items:center;gap:0 var(--space-3);flex-wrap:wrap;display:flex}@media (width>=48rem){.site-header__navigation{gap:var(--space-2) var(--space-5)}}.site-header__pages ul{align-items:center;gap:0 var(--space-3);flex-wrap:wrap;margin:0;padding:0;list-style:none;display:flex}@media (width>=48rem){.site-header__pages ul{gap:var(--space-1) var(--space-4)}}.site-header__pages a{min-height:44px;padding-inline:var(--space-1);color:var(--color-text);font-size:var(--font-size-small);border-block-end:2px solid #0000;align-items:center;font-weight:500;text-decoration:none;display:inline-flex}.site-header__pages a:hover{color:var(--color-accent);border-block-end-color:var(--color-border-strong)}.site-header__pages a[aria-current=page]{color:var(--color-accent);border-block-end-color:var(--color-accent)}.site-footer{padding-block:var(--space-5);border-top:1px solid var(--color-border);background-color:var(--color-canvas);color:var(--color-text-muted)}.site-footer__inner{justify-content:space-between;align-items:baseline;gap:var(--space-2) var(--space-6);flex-wrap:wrap;display:flex}.site-footer__links{gap:var(--space-2) var(--space-5);font-size:var(--font-size-small);flex-wrap:wrap;margin:0;display:flex}.site-footer__meta{gap:var(--space-2) var(--space-4);flex-wrap:wrap;margin:0;display:flex}.badge{border:1px solid var(--color-border-strong);color:var(--color-text);font-family:var(--font-data);font-size:var(--font-size-data);letter-spacing:var(--tracking-data);background-color:#0000;border-radius:0;align-items:center;padding:.25em .6em;line-height:1.5;display:inline-flex}.badge--question{border-color:var(--color-text);background-color:var(--color-text);color:var(--color-text-inverse)}.badge--energy{border-color:var(--color-accent);background-color:var(--color-accent-soft);color:var(--color-accent-strong)}.button-link{min-height:44px;padding:var(--space-2) var(--space-5);border-radius:var(--radius-control);transition:background-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard);border:1px solid #0000;justify-content:center;align-items:center;font-weight:600;line-height:1.25;text-decoration:none;display:inline-flex}.button-link--primary{background-color:var(--color-accent);border-color:var(--color-accent);color:var(--color-accent-contrast)}.button-link--primary:hover{background-color:var(--color-accent-strong);border-color:var(--color-accent-strong);color:var(--color-accent-contrast)}.button-link--secondary{border-color:var(--color-border-strong);color:var(--color-text);background-color:#0000}.button-link--secondary:hover{background-color:var(--color-text);border-color:var(--color-text);color:var(--color-text-inverse)}.button-link--text{min-height:auto;color:var(--color-accent);background-color:#0000;border:none;border-radius:0;padding:0;text-decoration:underline}.button-link--text:hover{color:var(--color-accent-strong)}.button-link:focus-visible{outline:3px solid var(--color-focus);outline-offset:2px}.prose{max-width:var(--width-reading)}.prose>:first-child{margin-block-start:0}.prose>:last-child{margin-block-end:0}.prose p,.prose ul,.prose ol{margin-block:0 var(--space-5)}.prose :is(h2,h3){scroll-margin-block-start:var(--space-5)}.prose h2{margin-block:var(--space-8) var(--space-4);border-block-start:1px solid var(--color-border);font-size:var(--font-size-section);padding-block-start:var(--space-4)}.prose>h2:first-child{border-block-start:0;margin-block-start:0;padding-block-start:0}.prose h3{margin-block:var(--space-6) var(--space-3);font-size:var(--font-size-card)}.prose li{margin-block-end:var(--space-2)}.prose li:last-child{margin-block-end:0}.prose a{text-underline-offset:.18em;text-decoration:underline}.prose strong{font-weight:600}.prose blockquote{margin-block:0 var(--space-5);padding:var(--space-3) var(--space-5);border-inline-start:3px solid var(--color-border-strong);color:var(--color-text-muted);background-color:#0000;margin-inline:0}.prose blockquote>:last-child{margin-block-end:0}.prose code{background-color:var(--color-surface-muted);font-family:var(--font-data);overflow-wrap:break-word;padding:.1em .35em;font-size:.9em}.prose pre{margin-block:0 var(--space-5);padding:var(--space-4);border:1px solid var(--color-border);background-color:var(--color-surface);overflow-x:auto}.prose pre code{overflow-wrap:normal;background-color:#0000;padding:0}.prose hr{margin-block:var(--space-6);border:0;border-top:1px solid var(--color-border)}.prose img{max-width:100%;height:auto;margin-block:0 var(--space-5)}.surface-card{block-size:100%;padding:var(--space-5);border:1px solid var(--color-border);background-color:var(--color-surface);transition:border-color var(--duration-normal) var(--ease-standard), background-color var(--duration-normal) var(--ease-standard)}.surface-card:hover{border-color:var(--color-border-strong)}li:has(>.question-card:hover) .surface-card,li:has(>.route-card:hover) .surface-card,li:has(>.lab-card:hover) .surface-card{border-color:var(--color-accent)}.language-switcher[data-astro-cid-dz6o6srk]{display:flex}@media (width>=48rem){.language-switcher[data-astro-cid-dz6o6srk]{border-inline-start:1px solid var(--color-border);padding-inline-start:var(--space-5)}}.language-switcher__list[data-astro-cid-dz6o6srk]{gap:var(--space-2);flex-wrap:wrap;margin:0;padding:0;list-style:none;display:flex}.language-switcher__item[data-astro-cid-dz6o6srk]{display:flex}.language-switcher__link[data-astro-cid-dz6o6srk]{min-height:44px;padding-inline:var(--space-2);color:var(--color-text-muted);font-family:var(--font-data);font-size:var(--font-size-data);letter-spacing:var(--tracking-data);align-items:center;text-decoration:none;display:inline-flex}.language-switcher__link[data-astro-cid-dz6o6srk]:hover{color:var(--color-accent);text-underline-offset:.25em;text-decoration:underline}