:root{--bg:#fff;--surface:#fff;--card:#fbfdff;--text:#0b1220;--muted:#6b7280;--accent:#ff3b30;--glass:rgba(2,6,23,.04);--radius:12px;--shadow-1:0 6px 18px rgba(15,23,42,.06)}*{box-sizing:border-box}#root,body,html{height:100%}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{max-width:920px;margin:48px auto;padding:24px}.site-header{background:var(--surface);padding:14px 0;position:-webkit-sticky;position:sticky;top:0;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:40;border-bottom:1px solid rgba(15,23,42,.04);box-shadow:0 6px 20px rgba(15,23,42,.03)}.site-header .inner{display:flex;align-items:center;justify-content:space-between}.logo{font-weight:700;color:var(--accent);text-decoration:none;font-size:1.05rem}.nav{display:flex;gap:16px}.nav a{color:var(--muted);text-decoration:none;font-size:.95rem}.main{margin-top:16px}.title{font-size:1.6rem;margin:6px 0 18px}.card{background:var(--card);border:1px solid rgba(15,23,42,.04);padding:22px;border-radius:var(--radius);box-shadow:var(--shadow-1)}.input,.textarea{width:100%;padding:12px 14px;border-radius:10px;border:1px solid rgba(15,23,42,.08);background:var(--surface);color:var(--text);font-size:1rem;box-shadow:inset 0 1px 0 rgba(2,6,23,.02)}.input::placeholder{color:var(--muted)}.input{height:44px}.textarea{min-height:120px;resize:vertical}.input:focus,.textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 8px 30px rgba(255,59,48,.08);background:var(--surface)}.youtube-type{display:inline-block;padding:6px 10px;border-radius:999px;background:linear-gradient(90deg,var(--accent),#ff7b72);color:#fff;font-weight:700;font-size:.85rem}.youtube-panel{background:linear-gradient(180deg,rgba(255,59,48,.06),hsla(0,0%,100%,.01));border:1px solid rgba(255,59,48,.08)}.form-row{display:flex;gap:12px;align-items:center}.btn{background:linear-gradient(90deg,var(--accent),#ff7b72);color:#08101a;border:none;padding:10px 14px;border-radius:10px;cursor:pointer;font-weight:600}.btn[disabled]{opacity:.6;cursor:not-allowed}.btn:active{transform:translateY(1px)}.copy-toast{position:fixed;right:20px;bottom:20px;background:#0b1220;color:#fff;padding:8px 12px;border-radius:8px;box-shadow:0 6px 20px rgba(2,6,23,.2)}.meta{color:var(--muted);font-size:.9rem;margin-top:12px}@media (max-width:640px){.container{padding:16px;margin:18px}.title{font-size:1.3rem}}