:root{--color-bg: #ffffff;--color-bg-alt: #fafafa;--color-text: #111111;--color-text-secondary: #555555;--color-text-muted: #999999;--color-border: #e0e0e0;--color-border-light: #f0f0f0;--color-accent: #111111;--color-accent-hover: #333333;--font-sans: "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.75rem;--font-size-3xl: 2.5rem;--font-size-4xl: 3.5rem;--font-size-hero: clamp(2.5rem, 6vw, 5rem);--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 5rem;--space-4xl: 8rem;--container-max: 1080px;--nav-height: 64px;--ease-out: cubic-bezier(.22, 1, .36, 1);--transition-fast: .2s var(--ease-out);--transition-base: .4s var(--ease-out);--transition-slow: .6s var(--ease-out)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);font-weight:400;color:var(--color-text);background-color:var(--color-bg);line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none;transition:opacity var(--transition-fast)}a:hover{opacity:.7}img{max-width:100%;display:block}ul{list-style:none}.container{max-width:var(--container-max);margin:0 auto;padding:0 var(--space-xl)}.section-title{font-size:var(--font-size-xs);font-weight:600;text-transform:uppercase;letter-spacing:.2em;color:var(--color-text-muted)}.section-line{width:40px;height:1px;background:var(--color-text);margin:var(--space-lg) 0 var(--space-3xl)}.fade-in{opacity:0;transform:translateY(30px);transition:opacity var(--transition-slow),transform var(--transition-slow)}.fade-in.visible{opacity:1;transform:translateY(0)}#navbar{position:fixed;top:0;left:0;right:0;height:var(--nav-height);background:#ffffffeb;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border-light);z-index:1000;transition:box-shadow var(--transition-base)}#navbar.scrolled{box-shadow:0 1px 20px #0000000f}.nav-inner{max-width:var(--container-max);margin:0 auto;padding:0 var(--space-xl);height:100%;display:flex;align-items:center;justify-content:space-between}.nav-logo{font-size:var(--font-size-lg);font-weight:700;letter-spacing:.05em}.nav-links{display:flex;gap:var(--space-2xl)}.nav-links a{font-size:var(--font-size-sm);font-weight:500;letter-spacing:.05em;position:relative;padding-bottom:2px}.nav-links a:after{content:"";position:absolute;bottom:0;left:0;width:0;height:1px;background:var(--color-text);transition:width var(--transition-base)}.nav-links a:hover{opacity:1}.nav-links a:hover:after{width:100%}.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px;z-index:1001}.nav-toggle span{display:block;width:22px;height:1.5px;background:var(--color-text);transition:transform var(--transition-fast),opacity var(--transition-fast)}.nav-toggle.active span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}.nav-toggle.active span:nth-child(2){opacity:0}.nav-toggle.active span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}#hero{height:100vh;min-height:600px;display:flex;align-items:center;justify-content:center;text-align:center;padding:0 var(--space-xl);position:relative}.hero-content{display:flex;flex-direction:column;align-items:center}.hero-greeting{font-size:var(--font-size-sm);font-weight:400;letter-spacing:.3em;text-transform:uppercase;color:var(--color-text-muted);margin-bottom:var(--space-md);opacity:0;animation:fadeUp .8s var(--ease-out) .2s forwards}.hero-name{font-size:var(--font-size-hero);font-weight:700;letter-spacing:-.02em;line-height:1.1;margin-bottom:var(--space-md);opacity:0;animation:fadeUp .8s var(--ease-out) .4s forwards}.hero-tagline{font-size:var(--font-size-lg);font-weight:300;color:var(--color-text-secondary);letter-spacing:.1em;margin-bottom:var(--space-2xl);opacity:0;animation:fadeUp .8s var(--ease-out) .6s forwards}.hero-line{width:1px;height:60px;background:var(--color-border);margin-bottom:var(--space-lg);opacity:0;animation:fadeUp .8s var(--ease-out) .8s forwards}.hero-cta{display:flex;align-items:center;gap:var(--space-sm);font-size:var(--font-size-xs);font-weight:500;letter-spacing:.15em;text-transform:uppercase;color:var(--color-text-muted);opacity:0;animation:fadeUp .8s var(--ease-out) 1s forwards}.hero-cta:hover{opacity:1;color:var(--color-text)}.hero-cta svg{animation:bounce 2s infinite}@keyframes fadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes bounce{0%,20%,50%,80%,to{transform:translateY(0)}40%{transform:translateY(6px)}60%{transform:translateY(3px)}}#about{padding:var(--space-4xl) 0}.about-grid{display:grid;grid-template-columns:280px 1fr;gap:var(--space-3xl);align-items:start}.about-image-placeholder{width:280px;height:340px;background:var(--color-bg-alt);border:1px solid var(--color-border-light);display:flex;align-items:center;justify-content:center;color:var(--color-text-muted)}.about-text h3{font-size:var(--font-size-2xl);font-weight:600;margin-bottom:var(--space-lg);line-height:1.3}.about-name-en{display:block;font-size:var(--font-size-sm);font-weight:400;color:var(--color-text-muted);letter-spacing:.1em;margin-top:var(--space-xs)}.about-text p{font-size:var(--font-size-base);color:var(--color-text-secondary);margin-bottom:var(--space-md);max-width:520px}.about-details{display:flex;gap:var(--space-2xl);margin-top:var(--space-2xl);padding-top:var(--space-xl);border-top:1px solid var(--color-border-light)}.about-detail-item{display:flex;flex-direction:column;gap:var(--space-xs)}.detail-label{font-size:var(--font-size-xs);font-weight:600;text-transform:uppercase;letter-spacing:.15em;color:var(--color-text-muted)}.detail-value{font-size:var(--font-size-sm);font-weight:500}#skills{padding:var(--space-4xl) 0;background:var(--color-bg-alt)}.skills-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-xl)}.skill-card{padding:var(--space-2xl) var(--space-xl);background:var(--color-bg);border:1px solid var(--color-border-light);transition:transform var(--transition-base),box-shadow var(--transition-base)}.skill-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px #0000000f}.skill-icon{margin-bottom:var(--space-lg);color:var(--color-text)}.skill-card h3{font-size:var(--font-size-base);font-weight:600;margin-bottom:var(--space-sm);letter-spacing:.02em}.skill-card p{font-size:var(--font-size-sm);color:var(--color-text-secondary);line-height:1.6}#works{padding:var(--space-4xl) 0}.under-construction{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-4xl) var(--space-xl);border:1px dashed var(--color-border);text-align:center;color:var(--color-text-muted)}.under-construction svg{margin-bottom:var(--space-xl);opacity:.4}.under-construction-title{font-size:var(--font-size-xl);font-weight:600;letter-spacing:.25em;color:var(--color-text);margin-bottom:var(--space-md)}.under-construction-text{font-size:var(--font-size-sm);color:var(--color-text-muted)}#contact{padding:var(--space-4xl) 0;background:var(--color-bg-alt)}.contact-content{text-align:center;max-width:640px;margin:0 auto}.contact-lead{font-size:var(--font-size-lg);color:var(--color-text-secondary);margin-bottom:var(--space-2xl)}.contact-form{display:flex;flex-direction:column;gap:var(--space-lg);text-align:left;margin-bottom:var(--space-2xl)}.contact-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-lg)}.contact-field{display:flex;flex-direction:column;gap:var(--space-sm)}.contact-field span{font-size:var(--font-size-xs);font-weight:600;text-transform:uppercase;letter-spacing:.14em;color:var(--color-text-muted)}.contact-field input,.contact-field textarea{width:100%;border:1px solid var(--color-border);background:var(--color-bg);color:var(--color-text);font:inherit;padding:.95rem 1rem;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.contact-field textarea{resize:vertical;min-height:160px}.contact-field input::placeholder,.contact-field textarea::placeholder{color:var(--color-text-muted)}.contact-field input:focus,.contact-field textarea:focus{outline:none;border-color:var(--color-text);box-shadow:0 0 0 3px #11111114}.contact-submit{align-self:flex-start;border:1px solid var(--color-text);background:var(--color-text);color:var(--color-bg);font:inherit;font-size:var(--font-size-sm);font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding:1rem 1.5rem;cursor:pointer;transition:background var(--transition-fast),color var(--transition-fast),border-color var(--transition-fast)}.contact-submit:hover:not(:disabled){background:var(--color-accent-hover);border-color:var(--color-accent-hover)}.contact-submit:disabled{cursor:wait;opacity:.7}.contact-status{min-height:1.7em;font-size:var(--font-size-sm);color:var(--color-text-secondary)}.contact-status.is-success{color:#0f766e}.contact-status.is-error{color:#b91c1c}.contact-botcheck{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);border:0}.contact-socials{display:flex;justify-content:center;gap:var(--space-lg)}.social-link{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--color-border);border-radius:50%;transition:background var(--transition-fast),border-color var(--transition-fast),color var(--transition-fast)}.social-link:hover{opacity:1;background:var(--color-text);border-color:var(--color-text);color:var(--color-bg)}#footer{padding:var(--space-2xl) 0;border-top:1px solid var(--color-border-light)}#footer p{font-size:var(--font-size-xs);color:var(--color-text-muted);text-align:center;letter-spacing:.05em}@media(max-width:900px){.skills-grid{grid-template-columns:repeat(2,1fr)}.about-grid{grid-template-columns:1fr;gap:var(--space-2xl)}.about-image-placeholder{width:200px;height:240px}}@media(max-width:640px){:root{--nav-height: 56px}.nav-toggle{display:flex}.nav-links{position:fixed;top:0;right:-100%;width:100%;height:100vh;background:var(--color-bg);flex-direction:column;align-items:center;justify-content:center;gap:var(--space-2xl);transition:right var(--transition-base)}.nav-links.open{right:0}.nav-links a{font-size:var(--font-size-xl)}.skills-grid,.work-card{grid-template-columns:1fr}.work-thumbnail{width:100%;height:120px}.about-details{flex-direction:column;gap:var(--space-md)}#hero{min-height:500px}.section-line{margin:var(--space-md) 0 var(--space-2xl)}#about,#skills,#works,#contact{padding:var(--space-3xl) 0}.contact-form-grid{grid-template-columns:1fr}.contact-submit{width:100%}}