:root{--bg: #fff;--bg-secondary: #f5f5f7;--bg-card: #fff;--text: #1d1d1f;--text-secondary: #6e6e73;--text-muted: #86868b;--border: rgba(0, 0, 0, .08);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .04);--shadow: 0 4px 24px rgba(0, 0, 0, .06);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .1);--font: "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, sans-serif;--radius: 16px;--radius-sm: 12px;--ease: cubic-bezier(.25, .1, .25, 1);--content-max: 1200px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}::selection{background:#0071e3;color:#fff}.nav{position:sticky;top:0;z-index:100;background:#ffffffb8;-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--border)}.nav-inner{max-width:var(--content-max);margin:0 auto;padding:0 24px;height:52px;display:flex;align-items:center;justify-content:space-between}.nav-brand{display:flex;align-items:center}.nav-logo{height:14px;opacity:.85}.nav-link{font-size:13px;font-weight:500;color:var(--text-muted);transition:color .2s var(--ease)}.nav-link:hover{color:var(--text)}.page{min-height:100vh;display:flex;flex-direction:column}.hero{padding:80px 24px 56px;text-align:center}.hero-inner{max-width:680px;margin:0 auto}.hero-eyebrow{display:none;font-size:12px;font-weight:600;color:var(--text-secondary);letter-spacing:.02em;margin-bottom:16px;padding:5px 14px;border-radius:100px;background:var(--bg-secondary);border:1px solid var(--border)}.hero-title{font-size:clamp(3rem,8vw,5.5rem);font-weight:800;line-height:1.05;letter-spacing:-.04em;color:var(--text)}.hero-line{display:block}.hero-subtitle{margin-top:20px;font-size:1rem;color:var(--text-secondary);font-weight:400;line-height:1.5}.share-x{display:inline-flex;align-items:center;gap:8px;margin-top:24px;padding:10px 24px;border-radius:100px;background:var(--text);color:var(--bg);font-size:14px;font-weight:600;transition:opacity .2s var(--ease),transform .2s var(--ease)}.share-x:hover{opacity:.8;transform:scale(1.03)}.share-x svg{flex-shrink:0}.hero-anim{opacity:0;transform:translateY(32px);filter:blur(8px);animation:hero-reveal .8s cubic-bezier(.16,1,.3,1) forwards;animation-delay:calc(var(--i, 0) * .12s + .1s)}.content{flex:1;padding:0 24px 96px}.month-nav{display:flex;gap:8px;max-width:var(--content-max);margin:0 auto 28px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.month-nav::-webkit-scrollbar{display:none}.month-nav:empty{display:none}.month-btn{flex-shrink:0;padding:7px 18px;border-radius:100px;border:1px solid var(--border);background:transparent;color:var(--text-secondary);font-family:var(--font);font-size:13px;font-weight:500;cursor:pointer;transition:all .2s var(--ease);white-space:nowrap}.month-btn:hover{background:var(--bg-secondary);color:var(--text)}.month-btn--active{background:var(--text);color:var(--bg);border-color:var(--text)}.month-btn--active:hover{background:var(--text);color:var(--bg)}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;max-width:var(--content-max);margin:0 auto}.video-card{display:block;position:relative;background:var(--bg-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:box-shadow .4s var(--ease),transform .4s var(--ease);opacity:0;transform:translateY(20px);animation:fade-in .5s var(--ease) forwards}.video-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}.video-thumb{aspect-ratio:16 / 9;overflow:hidden;position:relative;background:var(--bg-secondary)}.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}.video-card:hover .video-thumb img{transform:scale(1.04)}.video-duration{position:absolute;bottom:12px;right:12px;background:#0000008c;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#fff;font-size:11px;font-weight:600;padding:3px 9px;border-radius:8px;z-index:2;font-variant-numeric:tabular-nums}.video-play{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#00000026;opacity:0;transition:opacity .3s var(--ease);z-index:1}.video-card:hover .video-play{opacity:1}.video-play-icon{width:52px;height:52px;background:#ffffffe6;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px #00000026;transform:scale(.85);transition:transform .35s var(--ease)}.video-card:hover .video-play-icon{transform:scale(1)}.video-play-icon:after{content:"";display:block;width:0;height:0;border-style:solid;border-width:7px 0 7px 13px;border-color:transparent transparent transparent var(--text);margin-left:2px}.video-info{padding:14px 16px 18px}.video-channel{font-size:12px;font-weight:500;color:var(--text-muted);margin-bottom:4px}.video-title{font-size:15px;font-weight:600;color:var(--text);line-height:1.47;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.footer{border-top:1px solid var(--border);background:var(--bg-secondary);padding:28px 24px}.footer-inner{max-width:var(--content-max);margin:0 auto;display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-muted)}.footer-logo{height:14px;opacity:.35}.footer-note{max-width:var(--content-max);margin:12px auto 0;padding:0 24px;font-size:11px;color:var(--text-muted);opacity:.6;text-align:center}@keyframes fade-in{to{opacity:1;transform:translateY(0)}}@keyframes hero-reveal{to{opacity:1;transform:translateY(0);filter:blur(0)}}@media(max-width:640px){.hero{padding:56px 20px 40px}.content{padding:0 16px 64px}.video-grid{grid-template-columns:1fr;gap:16px}.footer{padding:20px 16px}.footer-inner{flex-direction:column;gap:8px;text-align:center}}