:root{--bg:#fff;--ink:#16161a;--sub:#8b8b95;--line:#ececf0;--line-strong:#d8d8de}*{box-sizing:border-box}html,body{height:100%}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:Hiragino Sans,Yu Gothic,system-ui,sans-serif;font-size:16px;line-height:1.8}button{font:inherit;cursor:pointer}button:disabled{cursor:default}.app{flex-direction:column;max-width:560px;height:100dvh;margin:0 auto;display:flex}.app-header{letter-spacing:.14em;color:var(--sub);flex-shrink:0;padding:18px 20px 10px;font-size:.9rem}.app-main{flex-direction:column;flex:1;min-height:0;padding:0 20px 24px;display:flex;overflow-y:auto}.compose{flex-direction:column;flex:1;gap:16px;min-height:0;display:flex}.compose-input{resize:none;width:100%;min-height:40vh;color:inherit;font:inherit;background:0 0;border:none;outline:none;flex:1;padding:8px 0;font-size:1.0625rem;line-height:1.9}.compose-input::placeholder{color:#c3c3cb}.primary-button{background:var(--ink);color:#fff;border:none;border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;gap:10px;width:100%;padding:15px;font-size:1rem;font-weight:600;display:flex}.primary-button:disabled{background:var(--line-strong);color:#fff}.spinner{border:2px solid #fff6;border-top-color:#fff;border-radius:50%;width:15px;height:15px;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.reply-view{flex-direction:column;gap:24px;padding-top:8px;display:flex}.ghost-button{border:1px solid var(--line-strong);color:var(--ink);background:0 0;border-radius:999px;align-self:center;padding:10px 24px;font-size:.9rem}.reply{flex-direction:column;align-items:flex-start;gap:12px;display:flex}.reply-text{margin:0;font-size:1.0625rem;line-height:1.95}.speak-button{border:1px solid var(--line-strong);color:var(--sub);background:0 0;border-radius:999px;padding:5px 14px;font-size:.8rem}.track{border:1px solid var(--line);width:100%;color:inherit;text-align:left;background:0 0;border-radius:14px;align-items:center;gap:12px;margin:0;padding:10px;text-decoration:none;display:flex}.track-play{background:var(--ink);color:#fff;border-radius:50%;flex-shrink:0;place-items:center;width:32px;height:32px;padding-left:2px;font-size:.7rem;display:grid}.track-meta{flex-direction:column;min-width:0;line-height:1.5;display:flex}.track-name{font-size:.95rem;font-weight:600}.track-artist{color:var(--sub);font-size:.85rem}.history{flex-direction:column;gap:32px;padding-top:8px;display:flex}.history-item{border-bottom:1px solid var(--line);flex-direction:column;gap:12px;padding-bottom:32px;display:flex}.history-item:last-child{border-bottom:none;padding-bottom:0}.history-date{color:var(--sub);font-size:.75rem}.history-postcard{white-space:pre-wrap;margin:0;font-size:1rem}.empty{text-align:center;color:var(--sub);margin:25vh 0 0;font-size:.9rem}.error{color:#d4384a;margin:16px 0 0;font-size:.85rem}.miniplayer{border-top:1px solid var(--line);flex-shrink:0;align-items:center;gap:12px;padding:8px 16px;display:flex}.miniplayer.is-idle{display:none}.miniplayer-video{background:#000;border-radius:8px;flex-shrink:0;width:120px;height:68px;overflow:hidden}.miniplayer-video iframe{border:0;width:120px;height:68px}.miniplayer-meta{flex-direction:column;gap:2px;min-width:0;line-height:1.4;display:flex}.miniplayer-title,.miniplayer-channel{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.miniplayer-title{font-size:.85rem}.miniplayer-channel{color:var(--sub);font-size:.75rem}.miniplayer-toggle{border:1px solid var(--line-strong);width:36px;height:36px;color:var(--ink);background:0 0;border-radius:50%;flex-shrink:0;margin-left:auto;font-size:.7rem}.tabbar{border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);flex-shrink:0;display:flex}.tabbar button{color:var(--sub);background:0 0;border:none;flex:1;padding:14px 0;font-size:.875rem}.tabbar button.active{color:var(--ink);font-weight:600}