*,:before,:after{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }::backdrop{--tw-border-spacing-x: 0;--tw-border-spacing-y: 0;--tw-translate-x: 0;--tw-translate-y: 0;--tw-rotate: 0;--tw-skew-x: 0;--tw-skew-y: 0;--tw-scale-x: 1;--tw-scale-y: 1;--tw-pan-x: ;--tw-pan-y: ;--tw-pinch-zoom: ;--tw-scroll-snap-strictness: proximity;--tw-gradient-from-position: ;--tw-gradient-via-position: ;--tw-gradient-to-position: ;--tw-ordinal: ;--tw-slashed-zero: ;--tw-numeric-figure: ;--tw-numeric-spacing: ;--tw-numeric-fraction: ;--tw-ring-inset: ;--tw-ring-offset-width: 0px;--tw-ring-offset-color: #fff;--tw-ring-color: rgb(59 130 246 / .5);--tw-ring-offset-shadow: 0 0 #0000;--tw-ring-shadow: 0 0 #0000;--tw-shadow: 0 0 #0000;--tw-shadow-colored: 0 0 #0000;--tw-blur: ;--tw-brightness: ;--tw-contrast: ;--tw-grayscale: ;--tw-hue-rotate: ;--tw-invert: ;--tw-saturate: ;--tw-sepia: ;--tw-drop-shadow: ;--tw-backdrop-blur: ;--tw-backdrop-brightness: ;--tw-backdrop-contrast: ;--tw-backdrop-grayscale: ;--tw-backdrop-hue-rotate: ;--tw-backdrop-invert: ;--tw-backdrop-opacity: ;--tw-backdrop-saturate: ;--tw-backdrop-sepia: ;--tw-contain-size: ;--tw-contain-layout: ;--tw-contain-paint: ;--tw-contain-style: }*,:before,:after{box-sizing:border-box;border-width:0;border-style:solid;border-color:#e5e7eb}:before,:after{--tw-content: ""}html,:host{line-height:1.5;-webkit-text-size-adjust:100%;-moz-tab-size:4;-o-tab-size:4;tab-size:4;font-family:ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol,"Noto Color Emoji";font-feature-settings:normal;font-variation-settings:normal;-webkit-tap-highlight-color:transparent}body{margin:0;line-height:inherit}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-feature-settings:normal;font-variation-settings:normal;font-size:1em}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}button,input,optgroup,select,textarea{font-family:inherit;font-feature-settings:inherit;font-variation-settings:inherit;font-size:100%;font-weight:inherit;line-height:inherit;letter-spacing:inherit;color:inherit;margin:0;padding:0}button,select{text-transform:none}button,input:where([type=button]),input:where([type=reset]),input:where([type=submit]){-webkit-appearance:button;background-color:transparent;background-image:none}:-moz-focusring{outline:auto}:-moz-ui-invalid{box-shadow:none}progress{vertical-align:baseline}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}summary{display:list-item}blockquote,dl,dd,h1,h2,h3,h4,h5,h6,hr,figure,p,pre{margin:0}fieldset{margin:0;padding:0}legend{padding:0}ol,ul,menu{list-style:none;margin:0;padding:0}dialog{padding:0}textarea{resize:vertical}input::-moz-placeholder,textarea::-moz-placeholder{opacity:1;color:#9ca3af}input::placeholder,textarea::placeholder{opacity:1;color:#9ca3af}button,[role=button]{cursor:pointer}:disabled{cursor:default}img,svg,video,canvas,audio,iframe,embed,object{display:block;vertical-align:middle}img,video{max-width:100%;height:auto}[hidden]:where(:not([hidden=until-found])){display:none}.container{width:100%}@media (min-width: 640px){.container{max-width:640px}}@media (min-width: 768px){.container{max-width:768px}}@media (min-width: 1024px){.container{max-width:1024px}}@media (min-width: 1280px){.container{max-width:1280px}}@media (min-width: 1536px){.container{max-width:1536px}}.fixed{position:fixed}.absolute{position:absolute}.relative{position:relative}.sticky{position:sticky}.block{display:block}.inline{display:inline}.flex{display:flex}.table{display:table}.grid{display:grid}.hidden{display:none}.flex-shrink{flex-shrink:1}.border-collapse{border-collapse:collapse}.transform{transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skew(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.flex-wrap{flex-wrap:wrap}.border{border-width:1px}.uppercase{text-transform:uppercase}.italic{font-style:italic}.underline{text-decoration-line:underline}.outline{outline-style:solid}.filter{filter:var(--tw-blur) var(--tw-brightness) var(--tw-contrast) var(--tw-grayscale) var(--tw-hue-rotate) var(--tw-invert) var(--tw-saturate) var(--tw-sepia) var(--tw-drop-shadow)}.transition{transition-property:color,background-color,border-color,text-decoration-color,fill,stroke,opacity,box-shadow,transform,filter,backdrop-filter;transition-timing-function:cubic-bezier(.4,0,.2,1);transition-duration:.15s}:root{--primary-color: #1a365d;--accent-color: #3182ce;--sidebar-bg: #f7fafc;--border-color: #e2e8f0}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Noto Sans JP,sans-serif;line-height:1.6;color:#333;background-color:#fafbfc}.layout-wrapper{display:flex;flex-direction:column;min-height:100vh}.drawer-overlay{display:none;position:fixed;inset:0;background:#00000080;z-index:140}.drawer-overlay.open{display:block}.drawer{position:fixed;top:0;right:-300px;width:280px;height:100vh;background:#fff;z-index:150;transition:right .3s ease;overflow-y:auto;box-shadow:-4px 0 20px #00000026}.drawer.open{right:0}.drawer-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;background:#0f172a;color:#fff}.drawer-header button{background:none;border:none;color:#fff;font-weight:700;cursor:pointer}.drawer-cat-item{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1.25rem;border-bottom:1px solid #f1f5f9;text-decoration:none;color:#1e293b;font-size:.9rem;font-weight:500;transition:background .15s}.drawer-cat-item:hover{background:#eff6ff;color:#2563eb}.category-label{display:inline-flex;align-items:center;gap:.35rem}header.site-header{background:#0f172a;color:#fff;padding:.75rem 0;position:sticky;top:0;z-index:130;box-shadow:0 1px 3px #0000001a}.header-inner{max-width:1152px;margin:0 auto;padding:0 1rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}.logo{color:#fff;text-decoration:none;font-weight:800;font-size:1.15rem;white-space:nowrap}nav.desktop-nav{display:none;align-items:center;gap:.25rem;margin-left:.5rem}nav.desktop-nav a{display:inline-flex;align-items:center;gap:.3rem;color:#fffc;text-decoration:none;font-size:.78rem;font-weight:600;padding:.4rem .6rem;border-radius:4px;white-space:nowrap;transition:background .15s,color .15s}nav.desktop-nav a:hover{background:#ffffff26;color:#fff}.menu-btn{background:#fff;color:#334155;border:1px solid #e2e8f0;border-radius:8px;padding:.45rem .7rem;font-size:.78rem;font-weight:700;cursor:pointer}.shogi-nav-icon{width:20px;height:24px;-o-object-fit:contain;object-fit:contain;vertical-align:middle;flex:0 0 auto}@media (min-width: 768px){nav.desktop-nav{display:flex}.menu-btn{display:none}}.container{flex:1;max-width:1400px;margin:0 auto;width:100%;padding:2rem 1.5rem;display:grid;grid-template-columns:1fr 300px;gap:2rem}.main-content{min-height:calc(100vh - 300px)}.sidebar{display:flex;flex-direction:column;gap:2rem}.sidebar-section{background:#fff;padding:1.5rem;border-radius:8px;border:1px solid var(--border-color)}.sidebar-section h3{color:var(--primary-color);font-size:1.1rem;margin-bottom:1rem;font-weight:700}.search-box input{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:4px;font-family:Noto Sans JP,sans-serif;font-size:.95rem}.search-box input:focus{outline:none;border-color:var(--accent-color);box-shadow:0 0 0 3px #3182ce1a}.about-box{color:#4a5568;font-size:.95rem;line-height:1.7}.about-box p{margin-bottom:.5rem}.about-box a{color:var(--accent-color);font-weight:600}.category-list{list-style:none}.category-list li{margin-bottom:.5rem}.category-list a{text-decoration:none;color:#3182ce;font-weight:500;transition:color .2s;display:flex;align-items:center;gap:.35rem}.category-list a:hover{color:var(--primary-color)}.site-footer{background:#f7fafc;border-top:1px solid var(--border-color);padding:2rem 1.5rem;text-align:center;color:#718096;font-size:.9rem;margin-top:auto}.footer-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:1.25rem;margin-bottom:1rem}.footer-nav a{color:#718096;text-decoration:none;font-size:.85rem}.footer-nav a:hover{color:var(--accent-color);text-decoration:underline}.site-footer p{margin:.5rem 0}@media (max-width: 1024px){.container{grid-template-columns:1fr 250px;gap:1.5rem;padding:1.5rem 1rem}}@media (max-width: 768px){.container{grid-template-columns:1fr;padding:1rem}.sidebar{order:-1;margin-bottom:2rem}}article{background:#fff;border-radius:8px;padding:2rem;margin-bottom:2rem;box-shadow:0 1px 3px #0000001a}article h1{color:var(--primary-color);margin-bottom:.5rem;font-size:2rem}article .meta{color:#718096;font-size:.9rem;margin-bottom:1.5rem}article h2{color:var(--primary-color);margin-top:1.5rem;margin-bottom:.5rem;font-size:1.5rem}article p{margin-bottom:1rem}article ul,article ol{margin-left:2rem;margin-bottom:1rem}article li{margin-bottom:.5rem}article code{background:#f0f0f0;color:#ff6b35!important;font-weight:700;padding:.2rem .4rem;border-radius:3px;font-family:Monaco,Menlo,Ubuntu Mono,Courier New,monospace;border:1px solid #e0e0e0}article pre{background-color:#f0f0f0!important;color:#ff6b35!important;font-weight:700;padding:1.5rem!important;border-radius:8px;overflow-x:auto;margin-bottom:1rem;border:1px solid #e0e0e0}article pre code{background:transparent!important;color:#ff6b35!important;font-weight:700;padding:0!important}article pre[style*=background-color]{background-color:#f0f0f0!important;color:#ff6b35!important;font-weight:700}article .astro-code{background:#f0f0f0!important;color:#ff6b35!important;font-weight:700}article .astro-code span{color:#ff6b35!important;font-weight:700}article .astro-code [style*=color]{color:#ff6b35!important;font-weight:700}a{color:var(--accent-color);text-decoration:none}a:hover{text-decoration:underline}