:root{--bg: #0f1216;--bg-card: #1a1e26;--bg-sidebar: #151922;--border: #2a303c;--text: #e6e9ef;--text-muted: #8b92a3;--accent: #22c55e;--accent-hover: #16a34a;--accent-dim: rgba(34, 197, 94, .15);--error: #ef4444;--radius: 10px;--radius-sm: 6px}*{box-sizing:border-box}body{font-family:DM Sans,system-ui,sans-serif;margin:0;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column}.app{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--bg-sidebar);border-right:1px solid var(--border);padding:20px 0;flex-shrink:0}.logo{display:flex;align-items:center;gap:10px;padding:0 20px 24px;border-bottom:1px solid var(--border);margin-bottom:16px}.logo-icon{width:32px;height:32px;background:var(--accent);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--bg);font-weight:700;font-size:16px}.logo-text{font-weight:700;font-size:1.1rem}nav.side-nav{padding:0 12px}nav.side-nav button{display:flex;align-items:center;gap:12px;width:100%;padding:12px 14px;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--text-muted);font:inherit;font-size:14px;cursor:pointer;text-align:left;margin-bottom:2px;transition:background .15s,color .15s}nav.side-nav button:hover{background:#ffffff0f;color:var(--text)}nav.side-nav button.active{background:var(--accent-dim);color:var(--accent)}.main{flex:1;display:flex;flex-direction:column;min-width:0}.header{height:56px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;background:var(--bg)}.header-title{font-weight:600;font-size:1rem}.header-user{display:flex;align-items:center;gap:10px;font-size:13px}.header-user .avatar{width:32px;height:32px;border-radius:50%;background:var(--accent-dim);color:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:600}.header-user .email{color:var(--text-muted);max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.header-user .linked-badge{color:var(--accent);font-size:12px}.header-user .not-linked{color:var(--text-muted)}.content{padding:24px;overflow:auto;flex:1}.panel{display:none}.panel.active{display:block}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px}.card h3{margin:0 0 16px;font-size:1rem;font-weight:600}label{display:block;margin:8px 0 4px;font-weight:500;font-size:13px;color:var(--text-muted)}input[type=text],input[type=email],input[type=datetime-local],textarea,select{width:100%;padding:10px 12px;margin-bottom:12px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font:inherit}input::placeholder,textarea::placeholder{color:var(--text-muted);opacity:.8}textarea{min-height:120px;resize:vertical}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 18px;border-radius:var(--radius-sm);font:inherit;font-weight:500;cursor:pointer;border:none;transition:background .15s,opacity .15s}.btn-primary{background:var(--accent);color:var(--bg)}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled,.btn-secondary:disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.btn-secondary{background:var(--bg-card);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:#ffffff0f}.btn-sm{padding:6px 12px;font-size:13px}#preview{border:1px solid var(--border);padding:12px;margin-top:8px;white-space:pre-wrap;background:var(--bg);min-height:60px;border-radius:var(--radius-sm);font-size:13px}.preview-box:empty:before{content:"Upload CSV and pick a template to see preview";color:var(--text-muted)}.error{color:var(--error);font-size:14px}.success{color:var(--accent)}.csv-info{font-size:13px;color:var(--text-muted);margin:4px 0}table{width:100%;border-collapse:collapse;margin-top:12px;font-size:14px}th,td{border:1px solid var(--border);padding:10px 12px;text-align:left}th{background:var(--bg-sidebar);color:var(--text-muted);font-weight:500}tr:hover{background:#ffffff05}.stat-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.stat-card .num{font-size:1.5rem;font-weight:700;color:var(--accent)}.stat-card .label{font-size:12px;color:var(--text-muted);margin-top:4px}.template-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}.template-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;cursor:pointer;transition:border-color .15s,box-shadow .15s;display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.template-card:hover{border-color:var(--accent)}.template-card.selected{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-dim)}.template-card-body{min-width:0;flex:1}.template-card .name{font-weight:600;margin-bottom:4px}.template-card .subject{font-size:13px;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.template-card .updated{font-size:12px;color:var(--text-muted);margin-top:8px}.template-card-delete{flex-shrink:0;padding:6px 12px;font-size:13px}.template-card-delete:hover{border-color:var(--error);color:var(--error)}.schedule-list{list-style:none;padding:0;margin:0}.schedule-list li{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--border);font-size:14px}.schedule-list li:last-child{border-bottom:none}.schedule-list .subject{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-right:12px}.schedule-list .meta{color:var(--text-muted);font-size:12px;margin-top:2px}.schedule-list .btn-sm{padding:6px 12px;font-size:13px;flex-shrink:0}.schedule-list .cancel-campaign{margin-left:8px}.schedule-list li>div:first-child{min-width:0}.action-row{display:flex;gap:12px;align-items:center;margin-top:16px;flex-wrap:wrap}.status-msg{font-size:14px;margin-top:8px}.datetime-wrap{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.datetime-wrap input[type=datetime-local]{flex:1;min-width:200px}.btn-calendar{padding:10px 14px;border-radius:var(--radius-sm);font:inherit;font-size:14px;cursor:pointer;background:var(--bg-card);color:var(--text);border:1px solid var(--border);white-space:nowrap}.btn-calendar:hover{background:#ffffff0f;border-color:var(--accent)}