:root{--accent:#2d6a4f;--bg:#f5f4f1;--card:#fff;--text:#22301f;--muted:#6b7280}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:Hiragino Sans,Noto Sans JP,system-ui,sans-serif}.header{z-index:10;background:var(--accent);color:#fff;align-items:center;gap:8px;padding:12px 16px;display:flex;position:sticky;top:0}.back{color:#fff;padding:0 6px 3px 0;font-size:30px;line-height:1;text-decoration:none}.title{white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:20px;font-weight:700;overflow:hidden}.main{max-width:720px;margin:0 auto;padding:12px}.empty{color:var(--muted);text-align:center;padding:48px 24px;line-height:1.8}.login-card{background:var(--card);text-align:center;border-radius:12px;margin-top:15vh;padding:40px 24px;box-shadow:0 1px 4px #00000014}.login-emoji{margin:0 0 12px;font-size:44px}.login-text{margin:0 0 8px;font-size:18px;font-weight:700}.login-sub{color:var(--muted);margin:0;font-size:15px;line-height:1.7}.group-list{flex-direction:column;gap:10px;display:flex}.group-card{background:var(--card);color:inherit;border-radius:12px;align-items:center;gap:12px;padding:10px;text-decoration:none;display:flex;box-shadow:0 1px 3px #0000000f}.group-cover{object-fit:cover;border-radius:8px;flex-shrink:0;width:64px;height:64px}.group-cover-empty{background:var(--bg);justify-content:center;align-items:center;font-size:24px;display:flex}.group-info{min-width:0}.group-name{white-space:nowrap;text-overflow:ellipsis;font-size:18px;font-weight:700;overflow:hidden}.group-meta{color:var(--muted);margin-top:4px;font-size:15px}.note-card{background:#fffbe8;border:1px solid #f0e6bb;border-radius:10px;margin:0 0 8px;padding:12px 14px}.note-text{white-space:pre-wrap;overflow-wrap:anywhere;margin:0 0 6px;font-size:16px;line-height:1.7}.note-meta{color:var(--muted);font-size:14px}.date-heading{color:var(--muted);margin:18px 2px 8px;font-size:16px;font-weight:700}.photo-grid{grid-template-columns:repeat(3,1fr);gap:3px;display:grid}.photo-cell{cursor:pointer;aspect-ratio:1;background:0 0;border:0;border-radius:4px;padding:0;overflow:hidden}.photo-thumb{object-fit:cover;width:100%;height:100%;display:block}.lightbox{z-index:100;cursor:zoom-out;background:#000000e0;flex-direction:column;justify-content:center;align-items:center;gap:12px;display:flex;position:fixed;inset:0}.lightbox-img{object-fit:contain;max-width:100vw;max-height:86vh}.lightbox-caption{color:#e5e7eb;gap:16px;font-size:15px;display:flex}@media (width>=600px){.photo-grid{grid-template-columns:repeat(4,1fr)}}