:root{--bg: #0f1115;--card: #181b22;--card-2: #1f232c;--text: #e6e8ec;--muted: #9aa3b2;--primary: #6366f1;--primary-d: #4f46e5;--danger: #ef4444;--border: #2a2f3a;--radius: 12px}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Hiragino Kaku Gothic ProN,Noto Sans JP,sans-serif;line-height:1.6}.center{min-height:100vh;display:grid;place-items:center;padding:24px}.muted{color:var(--muted)}.small{font-size:.85rem}.app{max-width:820px;margin:0 auto;padding:0 16px 64px}.topbar{display:flex;align-items:center;gap:16px;padding:16px 4px;position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--border);z-index:10}.brand{font-weight:700}.nav{display:flex;gap:12px}.nav a{color:var(--muted);text-decoration:none;padding:4px 8px;border-radius:8px}.nav a.active{color:var(--text);background:var(--card-2)}.spacer{flex:1}.content{padding-top:24px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.card h2{margin:0 0 12px;font-size:1.1rem}.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.stack{display:flex;flex-direction:column;gap:20px}.btn{background:var(--card-2);color:var(--text);border:1px solid var(--border);padding:8px 14px;border-radius:9px;cursor:pointer;font-size:.92rem}.btn:hover{border-color:#3a4151}.btn:disabled{opacity:.55;cursor:not-allowed}.btn.primary{background:var(--primary-d);border-color:var(--primary)}.btn.primary:hover{background:var(--primary)}.btn.ghost{background:transparent}.btn.danger{color:var(--danger)}.btn.block{display:block;width:100%;text-align:center;text-decoration:none;margin:12px 0 8px;padding:12px}.input{background:var(--bg);border:1px solid var(--border);border-radius:9px;padding:9px 12px;color:var(--text);font-size:.95rem}.input:focus{outline:2px solid var(--primary);outline-offset:-1px}.row{display:flex;align-items:center}.row.gap{gap:10px}.grow{flex:1}.briefing p{margin:.35em 0}.alert{background:var(--card-2);border:1px solid var(--border);border-radius:9px;padding:10px 12px;margin:10px 0;font-size:.9rem}.alert.error{border-color:var(--danger);color:#fecaca}.task-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.task-list li{display:flex;align-items:flex-start;gap:12px;padding:12px;background:var(--card-2);border:1px solid var(--border);border-radius:10px}.task-list li.done .task-title{text-decoration:line-through;color:var(--muted)}.task-body{flex:1}.task-title{font-weight:500}.task-mini{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.task-mini li{display:flex;align-items:center;gap:10px}.tag{display:inline-block;font-size:.7rem;background:var(--primary-d);color:#fff;padding:1px 7px;border-radius:999px;margin-left:8px;vertical-align:middle}.login-card{max-width:380px;text-align:center}.login-card h1{margin:0 0 8px}