:root{--bg: #0a0a0f;--bg-card: #12121a;--bg-hover: #1a1a26;--border: #2a2a3a;--text: #e4e4ef;--text-muted: #8888a0;--primary: #25D366;--primary-dark: #1da851;--accent: #6c5ce7;--danger: #ff4757;--warning: #ffa502;--success: #2ed573;--radius: 12px;--shadow: 0 4px 24px rgba(0,0,0,.3)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}a{color:var(--primary);text-decoration:none}button{cursor:pointer;font-family:inherit;border:none;border-radius:8px;padding:10px 20px;font-size:14px;font-weight:500;transition:all .2s}.btn-primary{background:var(--primary);color:#000}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{background:var(--bg-hover);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--border)}.btn-danger{background:var(--danger);color:#fff}input,textarea,select{font-family:inherit;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:10px 14px;color:var(--text);font-size:14px;width:100%;outline:none}input:focus,textarea:focus{border-color:var(--primary)}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:600;text-transform:uppercase}.badge-connected{background:#2ed57326;color:var(--success)}.badge-disconnected{background:#ff475726;color:var(--danger)}.badge-qr{background:#ffa50226;color:var(--warning)}.badge-connecting{background:#6c5ce726;color:var(--accent)}.layout{display:flex;min-height:100vh}.sidebar{width:260px;background:var(--bg-card);border-right:1px solid var(--border);padding:24px 16px;display:flex;flex-direction:column;position:fixed;height:100vh}.sidebar-logo{display:flex;align-items:center;gap:12px;padding:0 8px 24px;border-bottom:1px solid var(--border);margin-bottom:24px}.sidebar-logo h1{font-size:22px;font-weight:700;background:linear-gradient(135deg,var(--primary),#128C7E);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.nav-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:8px;color:var(--text-muted);font-size:14px;font-weight:500;margin-bottom:4px}.nav-item:hover,.nav-item.active{background:var(--bg-hover);color:var(--text)}.nav-item.active{border-left:3px solid var(--primary)}.main{flex:1;margin-left:260px;padding:32px}.page-header{margin-bottom:32px}.page-header h2{font-size:28px;font-weight:700;margin-bottom:8px}.page-header p{color:var(--text-muted)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-bottom:32px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.stat-card .label{font-size:13px;color:var(--text-muted);margin-bottom:8px}.stat-card .value{font-size:32px;font-weight:700}.session-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:20px}.session-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.session-card:hover{border-color:var(--primary)}.session-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.qr-container{display:flex;flex-direction:column;align-items:center;gap:16px;padding:24px}.qr-container img{width:260px;height:260px;border-radius:12px;background:#fff;padding:12px}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:radial-gradient(ellipse at top,rgba(37,211,102,.08),transparent 60%)}.login-card{width:400px;padding:40px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius)}.login-card h1{text-align:center;margin-bottom:8px;font-size:32px;background:linear-gradient(135deg,var(--primary),#128C7E);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.login-card p{text-align:center;color:var(--text-muted);margin-bottom:32px}.form-group{margin-bottom:16px}.form-group label{display:block;font-size:13px;color:var(--text-muted);margin-bottom:6px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:100}.modal{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;width:480px;max-width:90vw}.modal h3{margin-bottom:20px;font-size:20px}.modal-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:24px}.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}.empty-state h3{font-size:18px;margin-bottom:8px;color:var(--text)}.actions-row{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}.messages-layout{display:grid;grid-template-columns:420px 1fr;gap:24px;align-items:start}@media(max-width:900px){.messages-layout{grid-template-columns:1fr}}.compose-panel{position:sticky;top:32px}.type-selector{display:grid;grid-template-columns:1fr 1fr;gap:8px}.type-btn{display:flex;align-items:center;gap:8px;padding:10px 12px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text-muted);font-size:13px;cursor:pointer;transition:all .2s}.type-btn:hover{border-color:var(--primary);color:var(--text)}.type-btn.active{border-color:var(--primary);background:#25d36614;color:var(--primary)}textarea{font-family:inherit;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:10px 14px;color:var(--text);font-size:14px;width:100%;outline:none;resize:vertical}textarea:focus{border-color:var(--primary)}.result-banner{padding:12px 16px;border-radius:8px;font-size:13px;margin-top:12px}.result-banner.success{background:#2ed5731f;color:var(--success);border:1px solid rgba(46,213,115,.3)}.result-banner.error{background:#ff47571f;color:var(--danger);border:1px solid rgba(255,71,87,.3)}.api-snippet{background:var(--bg);padding:16px;border-radius:8px;font-size:12px;overflow:auto;max-height:200px;color:var(--primary);border:1px solid var(--border);white-space:pre-wrap;word-break:break-all}.messages-panel{max-height:calc(100vh - 180px);display:flex;flex-direction:column}.messages-list{overflow-y:auto;flex:1;display:flex;flex-direction:column;gap:12px;padding-right:4px}.message-item{padding:14px 16px;border-radius:10px;border:1px solid var(--border)}.message-item.sent{background:#25d3660f;border-color:#25d36633}.message-item.received{background:var(--bg)}.message-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.message-phone{font-weight:600;font-size:13px}.message-meta{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-muted)}.message-type{background:var(--bg-hover);padding:2px 8px;border-radius:4px;font-size:11px;text-transform:uppercase}.message-body{font-size:14px;line-height:1.5}.message-status{font-size:11px;color:var(--text-muted);margin-top:6px;text-transform:capitalize}.message-item.failed{background:#ff47570f;border-color:#ff47574d}.message-fail-reason{font-size:12px;color:var(--danger);margin-top:6px;line-height:1.4}.info-banner{padding:14px 18px;border-radius:8px;font-size:13px;margin-bottom:24px;background:#ffa5021a;border:1px solid rgba(255,165,2,.3);color:var(--warning);line-height:1.6}