:root{--green-dark: #075E54;--green-mid: #128C7E;--green-light: #25D366;--green-pale: #dcf8c6;--bg: #f0f2f5;--white: #ffffff;--text: #111b21;--text-secondary: #667781;--border: #e9edef;--red: #dc3545;--orange: #fd7e14;--blue: #0d6efd;--shadow: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);--shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);--radius: 10px;--radius-sm: 6px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:Inter,-apple-system,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5}.app{display:flex;flex-direction:column;min-height:100vh}.main-content{flex:1;padding:24px 20px;max-width:900px;margin:0 auto;width:100%}.navbar{background:var(--green-dark);padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:56px;position:sticky;top:0;z-index:100;box-shadow:var(--shadow)}.navbar-brand{display:flex;align-items:center;gap:10px;color:#fff}.navbar-logo{font-size:22px}.navbar-title{font-weight:700;font-size:16px;letter-spacing:-.3px}.navbar-links{display:flex;gap:4px}.nav-link{color:#ffffffbf;text-decoration:none;padding:8px 14px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;transition:all .15s}.nav-link:hover{color:#fff;background:#ffffff1a}.nav-link.active{color:#fff;background:#fff3}.card{background:var(--white);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.card-title{font-size:16px;font-weight:600;margin-bottom:16px;color:var(--text)}.card-subtitle{font-size:12px;color:var(--text-secondary);margin-top:4px}.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}.badge:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}.badge-connected{background:#d1fae5;color:#065f46}.badge-disconnected{background:#fee2e2;color:#991b1b}.badge-connecting,.badge-pending{background:#fef3c7;color:#92400e}.badge-sent{background:#d1fae5;color:#065f46}.badge-failed{background:#fee2e2;color:#991b1b}.badge-cancelled{background:#f3f4f6;color:#6b7280}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;cursor:pointer;border:none;transition:all .15s;text-decoration:none}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--green-dark);color:#fff}.btn-primary:hover:not(:disabled){background:var(--green-mid)}.btn-secondary{background:var(--white);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg)}.btn-danger{background:var(--red);color:#fff}.btn-danger:hover:not(:disabled){background:#bb2d3b}.btn-ghost{background:transparent;color:var(--text-secondary);padding:6px 10px}.btn-ghost:hover:not(:disabled){background:var(--bg);color:var(--text)}.btn-sm{padding:6px 12px;font-size:13px}.btn-full{width:100%}.form-group{margin-bottom:16px}.form-label{display:block;font-size:13px;font-weight:500;color:var(--text);margin-bottom:6px}.form-input,.form-textarea,.form-select{width:100%;padding:10px 12px;border:1.5px solid var(--border);border-radius:var(--radius-sm);font-size:14px;font-family:inherit;color:var(--text);background:var(--white);transition:border-color .15s;outline:none}.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--green-mid)}.form-textarea{resize:vertical;min-height:100px}.form-hint{font-size:12px;color:var(--text-secondary);margin-top:4px}.page-header{margin-bottom:24px}.page-title{font-size:22px;font-weight:700;color:var(--text)}.page-description{font-size:14px;color:var(--text-secondary);margin-top:4px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.status-card{display:flex;align-items:center;gap:16px}.status-icon{font-size:40px}.status-info{flex:1}.status-name{font-size:18px;font-weight:600}.status-phone{font-size:13px;color:var(--text-secondary);margin-top:2px}.qr-container{display:flex;flex-direction:column;align-items:center;gap:16px;padding:8px 0}.qr-image{width:220px;height:220px;border-radius:var(--radius-sm);border:2px solid var(--border)}.qr-instruction{font-size:13px;color:var(--text-secondary);text-align:center;max-width:280px}.stat-value{font-size:32px;font-weight:700;color:var(--green-dark)}.stat-label{font-size:13px;color:var(--text-secondary);margin-top:4px}.steps{display:flex;flex-direction:column;gap:20px}.step-number{width:28px;height:28px;background:var(--green-dark);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex-shrink:0}.step-header{display:flex;align-items:center;gap:10px;margin-bottom:12px}.step-title{font-size:15px;font-weight:600}.message-preview{background:var(--green-pale);border-radius:var(--radius);padding:16px;font-size:14px;line-height:1.6;white-space:pre-wrap;word-break:break-word;margin-bottom:12px;min-height:80px}.datetime-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.tab-bar{display:flex;gap:4px;margin-bottom:20px;border-bottom:2px solid var(--border)}.tab-btn{padding:8px 16px;background:none;border:none;font-size:13px;font-weight:500;color:var(--text-secondary);cursor:pointer;margin-bottom:-2px;border-bottom:2px solid transparent;transition:all .15s}.tab-btn.active{color:var(--green-dark);border-bottom-color:var(--green-dark)}.tab-btn:hover:not(.active){color:var(--text)}.message-card{background:var(--white);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);margin-bottom:12px;display:flex;flex-direction:column;gap:10px}.message-card-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.message-card-meta{font-size:12px;color:var(--text-secondary);display:flex;gap:12px;flex-wrap:wrap}.message-content-preview{font-size:13px;color:var(--text);line-height:1.5;white-space:pre-wrap;word-break:break-word;max-height:80px;overflow:hidden;position:relative}.message-content-preview.expanded{max-height:none}.message-card-actions{display:flex;gap:8px;flex-wrap:wrap}.theme-tag{display:inline-block;background:var(--bg);color:var(--text-secondary);font-size:11px;padding:2px 8px;border-radius:20px;font-weight:500}.empty-state{text-align:center;padding:48px 20px;color:var(--text-secondary)}.empty-state-icon{font-size:48px;margin-bottom:12px}.empty-state-text{font-size:15px;font-weight:500}.empty-state-sub{font-size:13px;margin-top:4px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:200;padding:20px}.modal{background:var(--white);border-radius:var(--radius);padding:24px;width:100%;max-width:540px;box-shadow:var(--shadow-md)}.modal-title{font-size:17px;font-weight:600;margin-bottom:20px}.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:20px}.settings-section{margin-bottom:24px}.settings-section-title{font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-secondary);margin-bottom:12px}.toast-container{position:fixed;bottom:24px;right:24px;display:flex;flex-direction:column;gap:8px;z-index:1000}.toast{padding:12px 18px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;color:#fff;box-shadow:var(--shadow-md);animation:slideIn .2s ease;max-width:340px}.toast-info{background:#1e40af}.toast-success{background:#065f46}.toast-error{background:#991b1b}@keyframes slideIn{0%{transform:translate(20px);opacity:0}to{transform:translate(0);opacity:1}}.spinner{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-screen{display:flex;align-items:center;justify-content:center;height:200px;color:var(--text-secondary);gap:10px}.divider{height:1px;background:var(--border);margin:16px 0}@media (max-width:600px){.main-content{padding:16px 12px}.grid-2,.grid-3,.datetime-row{grid-template-columns:1fr}.navbar-title{font-size:14px}}