:root{color:#111827;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Noto Sans JP,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;line-height:1.5}*,:before,:after{box-sizing:border-box}body{background:linear-gradient(#f8fafc 0%,#f1f5f9 100%);min-height:100vh;margin:0}#root{min-height:100vh}.home{max-width:1200px;margin:0 auto;padding:32px 20px 56px}.home__header{margin-bottom:24px}.home__header h1{margin:0 0 8px;font-size:clamp(1.6rem,3vw,2.2rem);line-height:1.2}.home__header p{color:#4b5563;margin:0}.home__message{color:#1e3a8a;background:#eef2ff;border-radius:10px;margin:16px 0 0;padding:10px 12px}.home__message--error{color:#991b1b;background:#fee2e2}.url-input{background:#fff;border:1px solid #d1d5db;border-radius:12px;margin-bottom:24px;padding:14px}.url-input__label{margin-bottom:10px;font-size:.95rem;font-weight:600;display:block}.url-input__row{gap:10px;display:flex}.url-input__field{border:1px solid #cbd5e1;border-radius:10px;flex:1;padding:10px 12px;font-size:1rem}.url-input__field:focus{outline-offset:1px;outline:2px solid #60a5fa}.url-input__button{color:#fff;cursor:pointer;background:#2563eb;border:0;border-radius:10px;padding:0 16px;font-weight:600}.url-input__button:hover{background:#1d4ed8}.url-input__error{color:#b91c1c;margin:10px 0 0;font-size:.9rem}.live-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin-top:24px;display:grid}.live-card{background:#fff;border:1px solid #e5e7eb;border-radius:14px;overflow:hidden;box-shadow:0 8px 24px #0f172a14}.live-card__link{color:inherit;height:100%;text-decoration:none;display:block}.live-card__thumbnail{aspect-ratio:16/9;object-fit:cover;width:100%;display:block}.live-card__body{padding:12px}.live-card__title{margin:0;font-size:.95rem;line-height:1.45}@media (width<=768px){.home{padding:24px 14px 42px}.url-input__row{flex-direction:column}.url-input__button{height:42px}}