:root{--bg: #f5f6fa;--surface: #ffffff;--border: #e2e5eb;--text: #1a1d29;--text-muted: #6b7280;--primary: #4f46e5;--primary-hover: #4338ca;--success: #16a34a;--warning: #d97706;--danger: #dc2626;--sidebar-bg: #17182b;--sidebar-text: #c7c9e0;--sidebar-active: #2c2d4a;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}@media (prefers-color-scheme: dark){:root{--bg: #14151f;--surface: #1c1e2b;--border: #2c2e40;--text: #eceef5;--text-muted: #9497ab}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}a{color:inherit;text-decoration:none}.app-shell{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--sidebar-bg);color:var(--sidebar-text);display:flex;flex-direction:column;padding:20px 0;flex-shrink:0}.sidebar-brand{padding:0 20px 20px;font-weight:700;font-size:1.1rem;color:#fff;letter-spacing:.02em}.sidebar-brand span{color:var(--primary)}.sidebar-nav{display:flex;flex-direction:column;gap:2px}.sidebar-nav a{padding:10px 20px;font-size:.9rem;border-left:3px solid transparent}.sidebar-nav a:hover{background:#ffffff0d}.sidebar-nav a.active{background:var(--sidebar-active);border-left-color:var(--primary);color:#fff}.main-area{flex:1;display:flex;flex-direction:column;min-width:0}.topbar{height:56px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;background:var(--surface)}.topbar .role-badge{font-size:.75rem;padding:2px 8px;border-radius:999px;background:var(--primary);color:#fff;margin-left:8px}.content{padding:24px;overflow-y:auto;flex:1}.card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:20px}.card+.card{margin-top:16px}.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin-bottom:20px}.stat-tile{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:16px}.stat-tile .label{font-size:.78rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em}.stat-tile .value{font-size:1.6rem;font-weight:700;margin-top:4px}table{width:100%;border-collapse:collapse;font-size:.9rem}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border)}th{color:var(--text-muted);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.03em}tr:last-child td{border-bottom:none}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;border:1px solid transparent;background:var(--primary);color:#fff;font-size:.88rem;font-weight:600;cursor:pointer}.btn:hover{background:var(--primary-hover)}.btn.secondary{background:transparent;border-color:var(--border);color:var(--text)}.btn.secondary:hover{background:var(--bg)}.btn:disabled{opacity:.5;cursor:not-allowed}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:.72rem;font-weight:600}.badge.pending{background:#fef3c7;color:#92400e}.badge.sent{background:#dbeafe;color:#1e40af}.badge.delivered,.badge.active,.badge.completed{background:#dcfce7;color:#166534}.badge.failed{background:#fee2e2;color:#991b1b}.badge.draft,.badge.disabled{background:#e5e7eb;color:#374151}.badge.scheduled,.badge.sending{background:#ede9fe;color:#5b21b6}.form-grid{display:grid;gap:12px;max-width:480px}.form-grid label{font-size:.85rem;font-weight:600;display:flex;flex-direction:column;gap:4px}input,select,textarea{padding:8px 10px;border-radius:6px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:.9rem;font-family:inherit}textarea{resize:vertical}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.page-header h1{font-size:1.3rem;margin:0}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}.login-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:32px;width:100%;max-width:360px}.login-card h1{text-align:center;font-size:1.3rem;margin-bottom:4px}.login-card .subtitle{text-align:center;color:var(--text-muted);font-size:.85rem;margin-bottom:24px}.error-text{color:var(--danger);font-size:.85rem}.muted{color:var(--text-muted);font-size:.85rem}.conversation-layout{display:flex;gap:16px;height:calc(100vh - 150px)}.conversation-list{width:280px;overflow-y:auto;border-right:1px solid var(--border);padding-right:12px}.conversation-item{padding:10px;border-radius:8px;cursor:pointer}.conversation-item:hover,.conversation-item.active{background:var(--bg)}.conversation-thread{flex:1;display:flex;flex-direction:column}.message-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:8px;padding:8px 0}.bubble{max-width:60%;padding:8px 12px;border-radius:10px;font-size:.88rem}.bubble.outbound{align-self:flex-end;background:var(--primary);color:#fff}.bubble.inbound{align-self:flex-start;background:var(--bg);border:1px solid var(--border)}.reply-row{display:flex;gap:8px;margin-top:8px}.reply-row input{flex:1}