:root{--primary: #FF7A3D;--primary-hover: #e86a2d;--bg: #f8f9fb;--surface: #ffffff;--border: #e5e7eb;--text: #1f2937;--text-secondary: #6b7280;--text-muted: #9ca3af;--success: #10b981;--error: #ef4444;--warning: #f59e0b;--info: #3b82f6;--radius: 10px;--shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.app{min-height:100vh}.header{background:var(--surface);border-bottom:1px solid var(--border);padding:16px 32px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:10}.header-brand{display:flex;align-items:center;gap:12px}.header-brand h1{font-size:20px;font-weight:700;color:var(--primary)}.header-brand span{font-size:13px;color:var(--text-muted);background:#f3f4f6;padding:2px 10px;border-radius:12px}.main{padding:32px;max-width:1200px;margin:0 auto}.tabs{display:flex;gap:4px;background:#f3f4f6;padding:4px;border-radius:var(--radius);margin-bottom:28px;width:fit-content}.tab{padding:8px 20px;border:none;background:none;border-radius:8px;font-size:14px;font-weight:500;color:var(--text-secondary);cursor:pointer;transition:all .15s}.tab:hover{color:var(--text)}.tab.active{background:var(--surface);color:var(--text);box-shadow:var(--shadow);font-weight:600}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.card+.card{margin-top:20px}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.card-title{font-size:16px;font-weight:600}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:28px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.stat-label{font-size:13px;color:var(--text-muted);margin-bottom:4px}.stat-value{font-size:28px;font-weight:700;color:var(--text)}.stat-sub{font-size:12px;color:var(--text-secondary);margin-top:2px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}th{text-align:left;padding:10px 12px;font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border)}td{padding:12px;font-size:14px;border-bottom:1px solid #f3f4f6;vertical-align:middle}tr:hover td{background:#fafbfc}.badge{display:inline-block;padding:2px 10px;border-radius:12px;font-size:12px;font-weight:600}.badge-draft{background:#f3f4f6;color:var(--text-secondary)}.badge-sending{background:#fef3c7;color:#92400e}.badge-sent{background:#d1fae5;color:#065f46}.badge-failed{background:#fee2e2;color:#991b1b}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border:none;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:all .15s}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-outline{background:none;border:1px solid var(--border);color:var(--text-secondary)}.btn-outline:hover:not(:disabled){border-color:var(--text-secondary);color:var(--text)}.btn-sm{padding:5px 12px;font-size:13px}.form-group{margin-bottom:16px}.form-label{display:block;font-size:13px;font-weight:600;color:var(--text-secondary);margin-bottom:6px}.form-input{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;color:var(--text);outline:none;transition:border-color .15s}.form-input:focus{border-color:var(--primary)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.preview-frame{width:100%;height:700px;border:1px solid var(--border);border-radius:var(--radius);background:#fff}.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px}.login-card{width:100%;max-width:400px}.login-card h2{text-align:center;margin-bottom:8px;color:var(--primary)}.login-card p{text-align:center;color:var(--text-muted);font-size:14px;margin-bottom:24px}.alert{padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:16px}.alert-error{background:#fee2e2;color:#991b1b}.alert-success{background:#d1fae5;color:#065f46}.empty{text-align:center;padding:48px 24px;color:var(--text-muted)}.empty-icon{font-size:48px;margin-bottom:12px}.spinner{display:inline-block;width:16px;height:16px;border:2px solid #fff;border-top-color:transparent;border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.config-section{margin-bottom:24px}.config-section h3{font-size:15px;font-weight:600;margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}