:root{--bg: #e5e5e5;--panel-bg: #ffffff;--panel-border: #e5e7eb;--ink: #0f1115;--muted: #6b7280;--accent: #007aff;--received-gray: #e9e9eb}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}.app{display:grid;grid-template-columns:1fr 420px;height:100vh;overflow:hidden}.stage{display:flex;align-items:center;justify-content:center;padding:28px;background:radial-gradient(1200px 800px at 30% 20%,#f7f7fb,#dcdee3 60%,#c7cacf);overflow:auto}.preview-col{display:flex;flex-direction:column;align-items:center;gap:12px;width:min(100%,520px)}.preview-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;width:100%;padding:0 4px}.preview-toolbar .btn{padding:6px 12px;font-size:13px;font-weight:500;border-radius:8px;cursor:pointer;font-family:inherit;border:0}.preview-hint{flex:1;font-size:11px;color:var(--muted);line-height:1.3}.preview-wrap{position:relative;width:100%;aspect-ratio:9 / 16;border-radius:20px;overflow:hidden;box-shadow:0 30px 70px -20px #00000047,0 10px 25px -10px #0000002e;background:transparent}.panel{border-left:1px solid var(--panel-border);background:var(--panel-bg);display:flex;flex-direction:column;overflow:hidden}.panel-head{padding:16px 18px 0;border-bottom:1px solid var(--panel-border)}.panel-head h1{margin:0 0 10px;font-size:18px;font-weight:700}.tabs{display:flex;gap:4px}.tab{flex:1;background:transparent;border:0;padding:10px 6px;font-size:13px;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;font-weight:500;font-family:inherit}.tab.active{color:var(--ink);border-color:var(--accent)}.pane{flex:1;overflow-y:auto;padding:16px 18px;display:flex;flex-direction:column;gap:10px}.panel label{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--muted)}.panel label.small{flex-direction:row;align-items:center;gap:6px;font-size:11px;color:var(--ink)}.panel input[type=text],.panel input[type=number],.panel select,.panel textarea{border:1px solid var(--panel-border);border-radius:8px;padding:8px 10px;font:inherit;color:var(--ink);background:#fff;font-size:13px;font-family:inherit}.panel textarea{resize:vertical;font-family:inherit}.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.row.btns{margin-top:4px}.seg-group{display:flex;gap:8px;flex-wrap:wrap}.seg{display:inline-flex;background:#f1f1f3;border-radius:8px;padding:2px}.seg-btn{border:0;background:transparent;padding:6px 10px;border-radius:6px;font-size:12px;color:var(--muted);cursor:pointer;font-family:inherit}.seg-btn.active{background:#fff;color:var(--ink);box-shadow:0 1px 2px #0000001f}.btn{background:var(--accent);color:#fff;border:0;padding:8px 12px;border-radius:8px;font-size:13px;cursor:pointer;font-weight:500;font-family:inherit}.btn.alt{background:#eef0f3;color:var(--ink)}.btn.danger{background:#fff;color:#d0322d;border:1px solid #f3caca}.btn-sec{background:#eef0f3;color:var(--ink);border:0;padding:6px 10px;border-radius:8px;font-size:12px;cursor:pointer;align-self:flex-start;font-family:inherit}.btn.primary{background:var(--ink);color:#fff;width:100%;padding:14px;font-weight:600;font-size:14px;margin-top:8px}.btn.primary:disabled{opacity:.5;cursor:not-allowed}.pane h3{margin:8px 0 4px;font-size:13px;color:var(--ink)}.pane h3 small{color:var(--muted);font-weight:400}.timeline{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;max-height:240px;overflow-y:auto}.timeline li{display:grid;grid-template-columns:10px 1fr auto;gap:8px;padding:8px 10px;border:1px solid var(--panel-border);border-radius:8px;background:#fafafa;font-size:12px;align-items:center}.tl-dot{width:8px;height:8px;border-radius:50%;background:var(--muted)}.tl-dot.received{background:#9aa0a6}.tl-dot.sent{background:var(--accent)}.tl-dot.sms{background:#44c756}.tl-label{color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tl-actions{display:flex;gap:2px}.tl-actions button{background:transparent;border:0;width:22px;height:22px;cursor:pointer;font-size:13px;color:var(--muted);border-radius:4px;font-family:inherit}.tl-actions button:hover{background:#eef0f3;color:var(--ink)}.tl-actions .tl-del:hover{color:#d0322d}.panel-foot{padding:12px 18px;border-top:1px solid var(--panel-border);display:flex;flex-direction:column;gap:8px;background:#fafafa}.render-status{font-size:12px;color:var(--muted);padding:6px 0;text-align:center}.render-status.ok{color:#1a8a39}.render-status.err{color:#d0322d}.render-status a{color:var(--accent);text-decoration:none}