:root{--bg: #f5f7fb;--surface: #ffffff;--surface-soft: #eef3fb;--text: #1f2937;--text-sub: #5f6b7a;--line: #d9e2f0;--primary: #1a73e8;--primary-soft: #e8f0fe;--shadow: 0 10px 30px rgba(15, 23, 42, .08);--shadow-hover: 0 14px 32px rgba(15, 23, 42, .12)}:root.dark{--bg: #0f172a;--surface: #111827;--surface-soft: #182235;--text: #e5e7eb;--text-sub: #b3bdd1;--line: #233049;--primary: #8ab4f8;--primary-soft: #1f2e46;--shadow: 0 10px 30px rgba(0, 0, 0, .3);--shadow-hover: 0 14px 32px rgba(0, 0, 0, .36)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Noto Sans JP,sans-serif;background:var(--bg);color:var(--text);line-height:1.7}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}button{font:inherit}.container{width:min(1120px,calc(100% - 32px));margin:0 auto}.site-header{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}.logo{font-weight:700;font-size:1.1rem;letter-spacing:.02em}.nav-links{display:flex;align-items:center;gap:20px}.nav-links a{color:var(--text-sub);font-size:.95rem;transition:color .2s ease}.nav-links a:hover{color:var(--primary)}.theme-toggle{display:inline-flex;align-items:center;justify-content:center;gap:4px;width:48px;height:48px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--text);cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}.theme-toggle:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.hero{padding:96px 0 72px}.hero-inner{min-height:calc(100vh - 120px);display:grid;place-content:center;text-align:center}.hero-eyebrow{margin:0 0 12px;color:var(--primary);font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:.9rem}.hero h1{margin:0 0 20px;font-size:clamp(2.3rem,5vw,4.3rem);line-height:1.15;letter-spacing:-.02em}.hero-text{margin:0 auto;max-width:760px;color:var(--text-sub);font-size:clamp(1rem,2vw,1.12rem)}.hero-actions{margin-top:32px;display:flex;justify-content:center;gap:14px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:999px;font-weight:700;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}.button:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.button-primary{background:var(--primary);color:#fff}:root.dark .button-primary{color:#0f172a}.button-secondary{background:var(--surface);color:var(--text);border:1px solid var(--line)}.section{padding:88px 0}.section-alt{background:var(--surface-soft)}.section-heading{margin-bottom:28px}.section-label{margin:0 0 8px;color:var(--primary);font-size:.88rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.section-heading h2{margin:0;font-size:clamp(1.8rem,4vw,2.5rem);line-height:1.2}.about-card{display:grid;grid-template-columns:220px 1fr;gap:32px;align-items:center;padding:28px;background:var(--surface);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}.about-profile{display:flex;justify-content:center}.profile-image{width:180px;height:180px;object-fit:cover;border-radius:999px;border:6px solid var(--primary-soft);box-shadow:var(--shadow)}.about-name{margin:0 0 12px;font-size:1.6rem}.about-copy{margin:0 0 12px;color:var(--text-sub)}.sns-block{margin-top:24px}.sns-title{margin:0 0 12px;font-size:.95rem;color:var(--text-sub);font-weight:700}.sns-links{display:flex;gap:14px;flex-wrap:wrap}.sns-button{width:56px;height:56px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--line);color:var(--text);box-shadow:0 4px 12px #0f172a0f;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,background .2s ease,color .2s ease}.sns-button:hover{transform:translateY(-3px) scale(1.05);border-color:var(--primary);box-shadow:var(--shadow-hover);background:var(--primary-soft);color:var(--primary)}.sns-svg{width:24px;height:24px;display:block}.sns-button[aria-label=Zenn] .sns-svg{width:22px;height:22px}.card-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}.card{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}.card h3{margin:0 0 10px;font-size:1.15rem}.card p{margin:0;color:var(--text-sub)}.project-card .text-link{display:inline-block;margin-top:16px;color:var(--primary);font-weight:700}.contact-block{text-align:center}.contact-text{margin:0 0 24px;color:var(--text-sub)}.site-footer{padding:28px 0 44px;border-top:1px solid var(--line)}.site-footer p{margin:0;text-align:center;color:var(--text-sub);font-size:.95rem}.fade{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}.fade.show{opacity:1;transform:translateY(0)}@media(max-width:960px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.about-card{grid-template-columns:1fr;text-align:center}.about-content{display:flex;flex-direction:column;align-items:center}.sns-links{justify-content:center}}@media(max-width:720px){.nav{flex-wrap:wrap;justify-content:center;padding:12px 0}.nav-links{width:100%;justify-content:center;flex-wrap:wrap;gap:14px}.hero{padding-top:72px}.section{padding:72px 0}.card-grid{grid-template-columns:1fr}.profile-image{width:144px;height:144px}}