:root{--accent: #2d6a4f;--accent-lt: #40916c;--accent-bg: #d8f3dc;--text-main: #1a1a1a;--text-muted: #6b6b6b;--border: #e0ded8;--bg: #ffffff;--bg-card: #ffffff;--bg-dark: #1a1a1a;--font-ja: "M PLUS Rounded 1c", "游ゴシック体", YuGothic, "游ゴシック", "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:70px}body{margin:0;background:var(--bg);color:var(--text-main);font-family:var(--font-ja);line-height:1.7;-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto;display:block}a{color:var(--accent)}.article-body{word-break:break-word;overflow-wrap:break-word}.site-header{position:sticky;top:0;z-index:100;background:var(--bg);border-bottom:1px solid var(--border)}.header-inner{max-width:1200px;margin:0 auto;padding:0 1.25rem;height:60px;display:flex;align-items:center;gap:2rem}.site-logo{display:flex;align-items:center;gap:6px;text-decoration:none;color:var(--text-main);font-weight:800;font-size:1.1rem;flex-shrink:0}.logo-mark{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:linear-gradient(135deg,var(--accent),var(--accent-lt));color:#fff;border-radius:40% 60% 55% 45%/45% 40% 60% 55%;font-size:1rem;font-weight:900}.header-nav{margin-left:auto}.header-nav ul{display:flex;list-style:none;margin:0;padding:0;gap:.25rem}.header-nav a{display:block;padding:6px 12px;text-decoration:none;color:var(--text-main);font-size:.875rem;font-weight:600;border-radius:6px;transition:background .15s}.header-nav a:hover{background:var(--accent-bg);color:var(--accent)}.header-search{display:flex;align-items:center;position:relative;margin-left:auto}.search-toggle{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;background:none;cursor:pointer;border-radius:8px;color:#555;flex-shrink:0;transition:background .15s,color .15s;z-index:1}.search-toggle:hover{background:var(--accent-bg);color:var(--accent)}.search-toggle[aria-expanded=true]{color:var(--accent);background:var(--accent-bg)}.header-search-form{position:absolute;right:40px;top:50%;transform:translateY(-50%);width:0;overflow:hidden;transition:width .25s ease}.header-search-form.is-open{width:220px}.header-search-input{width:100%;border:1.5px solid var(--border);border-radius:8px;padding:6px 12px;font-size:.875rem;font-family:inherit;background:var(--bg);color:var(--text-main);outline:none;transition:border-color .15s,box-shadow .15s}.header-search-input:focus{border-color:var(--accent);box-shadow:0 0 0 2px #2d6a4f1f}.header-search-input::-webkit-search-cancel-button{display:none}.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:36px;height:36px;padding:6px;border:none;background:none;cursor:pointer;margin-left:auto}.hamburger span{display:block;height:2px;background:var(--bg-dark);border-radius:2px;transition:transform .25s,opacity .25s}.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}.hamburger.is-open span:nth-child(2){opacity:0}.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.mobile-nav{display:none;background:var(--bg);border-top:1px solid var(--border);padding:1rem 1.25rem}.mobile-nav.is-open{display:block}.mobile-nav ul{list-style:none;margin:0;padding:0}.mobile-nav a{display:block;padding:10px 0;border-bottom:1px solid var(--border);color:var(--text-main);text-decoration:none;font-weight:600;font-size:.95rem}.mobile-search-form{padding:10px 0 2px}.mobile-search-wrap{display:flex;align-items:center;border:1.5px solid var(--border);border-radius:8px;background:var(--bg);padding:0 10px;transition:border-color .15s,box-shadow .15s}.mobile-search-wrap:focus-within{border-color:var(--accent);box-shadow:0 0 0 2px #2d6a4f1f}.mobile-search-icon{color:#aaa;flex-shrink:0;display:flex;align-items:center}.mobile-search-input{flex:1;border:none;outline:none;padding:8px;font-size:.95rem;font-family:inherit;background:transparent;color:var(--text-main);min-width:0}.mobile-search-input::-webkit-search-cancel-button{display:none}.site-footer{margin-top:4rem;background:var(--bg-dark);color:#c8c6c0}.footer-inner{max-width:1200px;margin:0 auto;padding:3rem 1.25rem 2rem;display:grid;grid-template-columns:200px 1fr;gap:3rem}.footer-logo a{display:flex;align-items:center;gap:6px;text-decoration:none;color:#fff;font-weight:800;font-size:1rem;margin-bottom:8px}.footer-logo .logo-mark{background:linear-gradient(135deg,var(--accent),var(--accent-lt));width:28px;height:28px;font-size:.875rem}.footer-tagline{font-size:.8rem;color:#888;margin:0}.footer-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}.footer-nav-title{font-size:.75rem;font-weight:700;color:var(--accent-lt);letter-spacing:.08em;margin:0 0 .5rem}.footer-nav-col ul{list-style:none;margin:0;padding:0}.footer-nav-col a{display:block;padding:3px 0;color:#999;text-decoration:none;font-size:.825rem;transition:color .15s}.footer-nav-col a:hover{color:#fff}.footer-bottom{border-top:1px solid #333;padding:1.25rem;text-align:center}.footer-disclaimer{font-size:.75rem;color:#666;max-width:700px;margin:0 auto .5rem;line-height:1.6}.footer-disclaimer a{color:var(--accent-lt)}.footer-copyright{font-size:.75rem;color:#555;margin:0}@media (max-width: 768px){.header-nav{display:none}.hamburger{display:flex}.header-search{display:none}.footer-inner{grid-template-columns:1fr;gap:2rem}.footer-nav{grid-template-columns:repeat(2,1fr)}}@media (max-width: 480px){.footer-nav{grid-template-columns:1fr}}