@import"https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@300;400;500;700&family=JetBrains+Mono:wght@300;400;500&family=Zen+Kaku+Gothic+New:wght@300;400;500&display=swap";:root{--green-100: #e8f0eb;--green-200: #c9dccf;--green-300: #96bfa2;--green-400: #5e9a6f;--green-500: #3d7a52;--green-600: #2a5c3c;--green-700: #1a3d28;--stone-50: #f4f5f3;--stone-100: #eaecea;--stone-200: #d4d8d4;--stone-300: #b0b6b0;--stone-400: #848c84;--stone-500: #5a625a;--stone-600: #3c433c;--stone-700: #252b25;--stone-800: #161b16;--stone-900: #0d100d;--amber-100: #fdf3e2;--amber-200: #f5d9a0;--amber-300: #e8b455;--amber-400: #c8882a;--amber-500: #9c6519;--amber-600: #6e450e;--sky-100: #e4eef6;--sky-200: #bdd3e8;--sky-300: #88afd2;--sky-400: #4e87ba;--sky-500: #2d6496;--sky-600: #1c4470;--color-primary: var(--green-500);--color-primary-light: var(--green-300);--color-primary-dark: var(--green-700);--color-accent: var(--green-400);--color-bg: #f2f4f1;--color-surface: #f9faf8;--color-surface-raised: #ffffff;--color-border: #dde0db;--color-border-subtle: #e8eae6;--color-text: var(--stone-500);--color-text-dark: var(--stone-700);--color-text-light: var(--stone-400);--color-text-faint: var(--stone-300);--color-sidebar-bg: #181d18;--color-sidebar-surface: #1e241e;--color-sidebar-border: #252c25;--color-sidebar-text: #6b756b;--color-sidebar-text-active: #d4dbd4;--color-sidebar-hover: #222922;--color-sidebar-active-bg: #1a2e1f;--color-sidebar-active-bar: var(--green-400);--color-header-bg: #f2f4f1;--color-header-border: var(--color-border);--color-header-text: var(--stone-700);--shadow-xs: 0 1px 2px rgba(20, 26, 20, .04);--shadow-sm: 0 1px 4px rgba(20, 26, 20, .06), 0 1px 2px rgba(20, 26, 20, .04);--shadow-md: 0 4px 12px rgba(20, 26, 20, .08), 0 2px 4px rgba(20, 26, 20, .05);--shadow-lg: 0 12px 32px rgba(20, 26, 20, .1), 0 4px 8px rgba(20, 26, 20, .06);--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--spacing-3xl: 4.5rem;--radius-sm: 3px;--radius-md: 5px;--radius-lg: 8px;--radius-xl: 12px;--transition-fast: .14s cubic-bezier(.4, 0, .2, 1);--transition-base: .22s cubic-bezier(.4, 0, .2, 1);--transition-slow: .38s cubic-bezier(.4, 0, .2, 1);--sidebar-width: 248px;--header-height: 56px;--content-max-width: 1200px}*,*:before,*:after{box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}body{margin:0;font-family:Zen Kaku Gothic New,Hiragino Kaku Gothic ProN,Yu Gothic,sans-serif;font-weight:300;line-height:1.7;color:var(--color-text);background-color:var(--color-bg);letter-spacing:.01em}body.no-scroll{overflow:hidden;overscroll-behavior:none}======================================== */ .app-layout{display:flex;min-height:100vh;position:relative}.mobile-header{display:none;position:fixed;top:0;left:0;right:0;height:var(--header-height);background-color:var(--color-header-bg);border-bottom:1px solid var(--color-header-border);align-items:center;padding:0 var(--spacing-lg);z-index:100;gap:var(--spacing-md)}.hamburger-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:none;border:1px solid var(--color-border);cursor:pointer;padding:0;border-radius:var(--radius-sm);transition:border-color var(--transition-fast),background-color var(--transition-fast);flex-shrink:0}.hamburger-btn:hover{border-color:var(--color-primary);background-color:var(--green-100)}.hamburger-icon{position:relative;width:16px;height:1.5px;background-color:var(--stone-500);border-radius:1px;transition:background-color var(--transition-fast)}.hamburger-icon:before,.hamburger-icon:after{content:"";position:absolute;left:0;width:16px;height:1.5px;background-color:var(--stone-500);border-radius:1px;transition:transform var(--transition-base),opacity var(--transition-base)}.hamburger-icon:before{top:-5px}.hamburger-icon:after{bottom:-5px}.hamburger-icon.open{background-color:transparent}.hamburger-icon.open:before{transform:translateY(5px) rotate(45deg)}.hamburger-icon.open:after{transform:translateY(-5px) rotate(-45deg)}.app-title{margin:0;font-family:"Noto Serif JP",serif;font-size:1rem;font-weight:400;color:var(--color-text-dark);letter-spacing:.08em}.app-title .title-jp{font-size:.7rem;color:var(--color-text-light);display:block;letter-spacing:.12em;font-weight:300;margin-top:1px;line-height:1}.mobile-overlay{display:none}.main-content{flex:1;margin-left:var(--sidebar-width);padding:var(--spacing-2xl) var(--spacing-2xl);max-width:calc(100% - var(--sidebar-width));min-height:100vh}.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-width);background-color:var(--color-sidebar-bg);border-right:1px solid var(--color-sidebar-border);display:flex;flex-direction:column;z-index:200;transition:transform var(--transition-base)}.sidebar-header{padding:var(--spacing-xl) var(--spacing-lg);border-bottom:1px solid var(--color-sidebar-border)}.logo{display:flex;flex-direction:column;gap:6px}.logo-mark{display:flex;align-items:center;gap:10px}.logo-kanji{font-family:"Noto Serif JP",serif;font-size:1.4rem;font-weight:400;color:var(--green-300);line-height:1;letter-spacing:.04em}.logo-dot{width:4px;height:4px;border-radius:50%;background-color:var(--green-500);flex-shrink:0}.logo-text{font-family:JetBrains Mono,monospace;font-size:.65rem;font-weight:300;color:var(--stone-500);text-transform:uppercase;letter-spacing:.18em;line-height:1}.logo-subtitle{font-family:JetBrains Mono,monospace;font-size:.6rem;color:var(--stone-600);letter-spacing:.1em;font-weight:300}.nav-section{flex:1;overflow-y:auto;padding:var(--spacing-lg) 0}.nav-section::-webkit-scrollbar{width:2px}.nav-section::-webkit-scrollbar-track{background:transparent}.nav-section::-webkit-scrollbar-thumb{background:var(--color-sidebar-border)}.nav-group{margin-bottom:0}.nav-group-label{font-family:JetBrains Mono,monospace;font-size:.55rem;font-weight:400;color:var(--stone-600);text-transform:uppercase;letter-spacing:.2em;padding:0 var(--spacing-lg) var(--spacing-xs);display:block}.nav-list{list-style:none;margin:0;padding:0 var(--spacing-sm);display:flex;flex-direction:column;gap:2px}.nav-item{margin:0}.nav-link{display:flex;align-items:center;gap:var(--spacing-sm);padding:10px var(--spacing-md);border-radius:var(--radius-md);color:var(--color-sidebar-text);text-decoration:none;transition:color var(--transition-fast),background-color var(--transition-fast);font-family:Zen Kaku Gothic New,sans-serif;font-size:.875rem;font-weight:300;letter-spacing:.02em;position:relative}.nav-link:hover{background-color:var(--color-sidebar-hover);color:var(--color-sidebar-text-active)}.nav-link.active{background-color:var(--color-sidebar-active-bg);color:var(--color-sidebar-text-active)}.nav-link.active:before{content:"";position:absolute;left:0;top:20%;height:60%;width:2px;background-color:var(--color-sidebar-active-bar);border-radius:0 1px 1px 0}.nav-icon{display:flex;align-items:center;justify-content:center;width:18px;height:18px;flex-shrink:0;opacity:.6;transition:opacity var(--transition-fast)}.nav-link:hover .nav-icon,.nav-link.active .nav-icon{opacity:1}.nav-label{font-size:.875rem;line-height:1}.sidebar-footer{position:relative;padding:var(--spacing-sm) var(--spacing-md);border-top:1px solid var(--color-sidebar-border)}.page-container{max-width:var(--content-max-width);margin:0 auto}.page-header{margin-bottom:var(--spacing-3xl);padding-bottom:var(--spacing-xl);border-bottom:1px solid var(--color-border-subtle)}.page-title{font-family:"Noto Serif JP",serif;font-size:1.875rem;font-weight:300;color:var(--color-text-dark);margin:0 0 var(--spacing-xs) 0;letter-spacing:-.01em;line-height:1.3}.page-title-en{font-family:JetBrains Mono,monospace;font-size:.7rem;font-weight:300;color:var(--color-text-faint);letter-spacing:.15em;text-transform:uppercase;display:block;margin-bottom:var(--spacing-md)}.page-subtitle{font-size:.9375rem;color:var(--color-text-light);margin:0;font-weight:300}.card{background-color:var(--color-surface-raised);border-radius:var(--radius-lg);border:1px solid var(--color-border-subtle);padding:var(--spacing-xl);box-shadow:var(--shadow-xs);margin-bottom:var(--spacing-lg);transition:box-shadow var(--transition-base),border-color var(--transition-base)}.card:hover{box-shadow:var(--shadow-sm);border-color:var(--color-border)}.card-title{font-family:"Noto Serif JP",serif;font-size:1.0625rem;font-weight:400;color:var(--color-text-dark);margin:0 0 var(--spacing-md) 0;letter-spacing:.01em}.text-primary{color:var(--color-primary)}.text-mono{font-family:JetBrains Mono,monospace;letter-spacing:.05em}@media(max-width:768px){.mobile-header{display:flex}.sidebar{transform:translate(-100%)}.sidebar.mobile-open{transform:translate(0)}.mobile-overlay{display:block;position:fixed;inset:0;background-color:#0d100d99;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:150;animation:overlayIn var(--transition-base)}.main-content{margin-left:0;max-width:100%;padding:calc(var(--header-height) + var(--spacing-xl)) var(--spacing-lg) var(--spacing-xl)}.page-title{font-size:1.5rem}}@media(min-width:769px){.sidebar{transform:translate(0)!important}}@keyframes overlayIn{0%{opacity:0}to{opacity:1}}.section-label{font-family:JetBrains Mono,monospace;font-size:.6rem;font-weight:400;color:var(--color-text-faint);text-transform:uppercase;letter-spacing:.2em;margin:0 0 var(--spacing-lg) 0;display:flex;align-items:center;gap:var(--spacing-sm)}.section-label:after{content:"";flex:1;height:1px;background:var(--color-border-subtle)}