:root{--bg:#f1f3f6;--surface:#ffffff;--text:#1f2430;--muted:#6b7280;--border:#e4e7ee;--accent:#3556c7;--accent-hover:#2a46a8;--accent-soft:#eef1fb;--danger:#dc2626;--sales-bg:#fef3c7;--sales-fg:#b45309;--designer-bg:#f3e8ff;--designer-fg:#7c3aed;--radius:12px;--shadow:0 1px 2px rgba(16,24,40,0.06),0 1px 3px rgba(16,24,40,0.08)}*{margin:0;padding:0;box-sizing:border-box}body,html{height:100%}body{background:var(--bg);color:var(--text);font-family:Hiragino Kaku Gothic ProN,Hiragino Sans,Noto Sans JP,Meiryo,system-ui,sans-serif;font-size:14px;line-height:1.6}button{font:inherit;cursor:pointer}input,textarea{font:inherit;color:inherit}.btn{border:1px solid transparent;border-radius:8px;padding:8px 16px;font-weight:600;transition:background .15s}.btn-sm{padding:4px 10px;font-size:12px}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:default}.btn-ghost{background:transparent;color:var(--muted);border-color:var(--border)}.btn-ghost:hover{background:var(--accent-soft);color:var(--accent)}.form-error{color:var(--danger);font-size:12px;margin-bottom:6px}.avatar{flex:none;width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}.avatar-sm{width:22px;height:22px;font-size:11px}.avatar.dept-sales{background:var(--sales-bg);color:var(--sales-fg)}.avatar.dept-designer{background:var(--designer-bg);color:var(--designer-fg)}.dept-badge{display:inline-block;border-radius:999px;padding:1px 10px;font-size:11px;font-weight:600}.dept-badge.dept-sales{background:var(--sales-bg);color:var(--sales-fg)}.dept-badge.dept-designer{background:var(--designer-bg);color:var(--designer-fg)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.login-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:36px 32px;width:100%;max-width:380px}.login-title{font-size:20px;text-align:center}.login-sub{color:var(--muted);font-size:13px;text-align:center;margin:6px 0 24px}.login-form{gap:16px}.login-form,.login-form label{display:flex;flex-direction:column}.login-form label{gap:6px;font-size:13px;font-weight:600}.login-form input{border:1px solid var(--border);border-radius:8px;padding:10px 12px}.login-form input:focus{outline:2px solid var(--accent);outline-offset:-1px}.app{height:100vh;display:flex;flex-direction:column}.app-header{flex:none;background:var(--surface);border-bottom:1px solid var(--border);justify-content:space-between;padding:10px 20px}.app-brand,.app-header{display:flex;align-items:center}.app-brand{gap:10px}.app-logo{background:var(--accent);color:#fff;font-weight:800;font-size:13px;border-radius:8px;padding:4px 8px}.app-name{font-weight:700;font-size:15px}.app-header-right{display:flex;align-items:center;gap:10px}.me-name{font-weight:600}.dashboard{flex:1 1;min-height:0;display:flex;flex-direction:column;gap:16px;padding:16px 20px 20px}.taskboard{flex:none}.taskboard-header{display:flex;align-items:baseline;gap:12px;margin-bottom:10px}.taskboard-title{font-size:16px}.taskboard-date{color:var(--muted);font-size:13px}.task-cards{display:flex;gap:12px;overflow-x:auto;align-items:flex-start;padding-bottom:6px}.task-card{flex:none;width:270px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px}.task-card-mine{border-color:var(--accent)}.task-card-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}.task-card-who{flex:1 1;min-width:0;display:flex;flex-direction:column;align-items:flex-start;gap:2px}.task-card-name{font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.task-card-content{white-space:pre-wrap;word-break:break-word}.task-card-empty{color:var(--muted);background:var(--bg);border-radius:8px;padding:10px;text-align:center;font-size:13px}.task-card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:10px}.task-editor textarea{width:100%;border:1px solid var(--border);border-radius:8px;padding:8px 10px;resize:vertical}.task-editor textarea:focus{outline:2px solid var(--accent);outline-offset:-1px}.task-editor-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:8px}.columns{flex:1 1;min-height:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:16px;gap:16px}.column{min-height:0;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.column-header{flex:none;padding:12px 16px 10px;border-bottom:1px solid var(--border)}.column-title{font-size:15px}.column-sub{color:var(--muted);font-size:12px}.column-messages{flex:1 1;min-height:0;overflow-y:auto;padding:12px 16px;display:flex;flex-direction:column;gap:10px}.column-empty{color:var(--muted);font-size:13px;text-align:center;margin-top:20px}.column-composer{flex:none;border-top:1px solid var(--border);padding:10px 12px}.msg{background:var(--bg);border-radius:10px;padding:8px 12px}.msg-meta{display:flex;align-items:baseline;gap:8px}.msg-author{font-weight:700;font-size:13px}.msg-time{color:var(--muted);font-size:11px}.msg-body{white-space:pre-wrap;word-break:break-word}.reply-toggle{background:none;border:none;color:var(--accent);font-size:12px;font-weight:600;padding:2px 0}.reply-toggle:hover{text-decoration:underline}.reply-section{margin-top:8px;padding-left:10px;border-left:3px solid var(--border);display:flex;flex-direction:column;gap:8px}.reply{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:6px 10px}.composer-row{display:flex;align-items:flex-end;gap:8px}.composer textarea{flex:1 1;border:1px solid var(--border);border-radius:8px;padding:8px 10px;resize:none;background:var(--surface)}.composer textarea:focus{outline:2px solid var(--accent);outline-offset:-1px}.composer-compact textarea{font-size:13px}.dm-partners{flex:none;display:flex;gap:6px;flex-wrap:wrap;padding:10px 16px;border-bottom:1px solid var(--border)}.dm-partner{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:999px;background:var(--surface);padding:3px 12px 3px 4px;font-size:12px;font-weight:600}.dm-partner-active,.dm-partner:hover{border-color:var(--accent)}.dm-partner-active{background:var(--accent-soft);color:var(--accent)}@media (max-width:1100px){.app{height:auto;min-height:100vh}.columns{grid-template-columns:1fr}.column{min-height:420px;max-height:560px}}