:root{--color-primary:#2563eb;--color-primary-dark:#1d4ed8;--color-primary-light:#3b82f6;--color-primary-xlight:#eff6ff;--color-success:#16a34a;--color-success-light:#f0fdf4;--color-warning:#d97706;--color-warning-light:#fffbeb;--color-error:#dc2626;--color-error-light:#fef2f2;--color-info:#2563eb;--color-info-light:#eff6ff;--color-background:#f8fafc;--color-surface:#fff;--color-surface-secondary:#f8fafc;--color-text-primary:#0f172a;--color-text-secondary:#64748b;--color-text-tertiary:#94a3b8;--color-border:#e2e8f0;--color-border-light:#f1f5f9;--sidebar-bg:#111;--sidebar-text:#ffffff80;--sidebar-text-active:#fff;--sidebar-hover:#ffffff1a;--spacing-xs:4px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--spacing-xxl:48px;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-full:9999px;--shadow-sm:0 1px 2px #0000000d;--shadow-md:0 4px 6px -1px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a;--sidebar-width:220px;--header-height:56px}.dark{--color-background:#0f172a;--color-surface:#1e293b;--color-surface-secondary:#334155;--color-text-primary:#f1f5f9;--color-text-secondary:#94a3b8;--color-text-tertiary:#64748b;--color-border:#334155;--color-border-light:#1e293b}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--color-background);color:var(--color-text-primary);-webkit-font-smoothing:antialiased;font-family:Outfit,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.5}.mono,.font-mono{font-family:DM Mono,monospace}a{color:var(--color-primary);text-decoration:none}a:hover{color:var(--color-primary-dark)}button{cursor:pointer;font-family:Outfit,sans-serif}input,textarea,select{font-family:Outfit,sans-serif}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-surface-secondary)}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-text-tertiary)}.app-layout{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-width);background-color:var(--sidebar-bg);z-index:100;flex-direction:column;display:flex;position:fixed;top:0;bottom:0;left:0}.sidebar-logo{border-bottom:1px solid #ffffff1a;padding:24px 24px 20px}.sidebar-logo h1{color:#fff;letter-spacing:-.5px;font-family:Outfit,sans-serif;font-size:18px;font-weight:700}.sidebar-nav{flex:1;padding:12px;overflow-y:auto}.nav-item{height:40px;color:var(--sidebar-text);cursor:pointer;background:0 0;border:none;border-radius:8px;align-items:center;gap:12px;width:100%;margin-bottom:2px;padding:0 12px;font-size:14px;font-weight:500;text-decoration:none;transition:all .15s;display:flex}.nav-item:hover,.nav-item.active{background-color:var(--sidebar-hover);color:var(--sidebar-text-active)}.nav-item svg{flex-shrink:0;width:20px;height:20px}.sidebar-footer{border-top:1px solid #ffffff1a;padding:16px}.sidebar-footer .user-info{margin-bottom:12px}.sidebar-footer .user-name{color:var(--sidebar-text-active);font-size:14px;font-weight:600}.sidebar-footer .user-email{color:var(--sidebar-text);margin-top:2px;font-size:12px}.sidebar-footer .user-role{color:var(--sidebar-text);text-transform:uppercase;letter-spacing:.5px;margin-top:4px;font-size:11px}.main-content{margin-left:var(--sidebar-width);background-color:var(--color-background);flex-direction:column;flex:1;display:flex}.header{height:var(--header-height);background-color:var(--color-surface);border-bottom:1px solid var(--color-border);z-index:50;justify-content:space-between;align-items:center;padding:0 24px;display:flex;position:sticky;top:0}.header-left{align-items:center;gap:16px;display:flex}.header-right{align-items:center;gap:12px;display:flex}.search-input{background-color:var(--color-background);border:1px solid var(--color-border);border-radius:8px;align-items:center;min-width:280px;padding:8px 12px;transition:border-color .15s,box-shadow .15s;display:flex}.search-input:focus-within{border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1a}.search-input input{width:100%;color:var(--color-text-primary);background:0 0;border:none;outline:none;margin-left:8px;font-size:14px}.search-input input::placeholder{color:var(--color-text-tertiary)}.language-selector{background-color:var(--color-background);border:1px solid var(--color-border);border-radius:8px;align-items:center;gap:4px;padding:4px;display:flex}.language-btn{color:var(--color-text-secondary);background:0 0;border:none;border-radius:6px;padding:6px 10px;font-size:13px;font-weight:500;transition:all .15s}.language-btn:hover{background-color:var(--color-surface);color:var(--color-text-primary)}.language-btn.active{background-color:var(--color-surface);color:var(--color-text-primary);box-shadow:var(--shadow-sm)}.theme-toggle{border:1px solid var(--color-border);background-color:var(--color-surface);width:36px;height:36px;color:var(--color-text-secondary);border-radius:8px;justify-content:center;align-items:center;transition:all .15s;display:flex}.theme-toggle:hover{background-color:var(--color-background);color:var(--color-text-primary)}.page-content{flex:1;padding:24px;overflow-y:auto}.page-title{color:var(--color-text-primary);margin-bottom:24px;font-family:Outfit,sans-serif;font-size:24px;font-weight:700}.card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;padding:24px}.card-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.card-title{color:var(--color-text-primary);font-size:16px;font-weight:600}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:24px;display:grid}.stat-card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;padding:20px}.stat-value{color:var(--color-primary);font-family:DM Mono,monospace;font-size:28px;font-weight:700}.stat-label{color:var(--color-text-secondary);margin-top:4px;font-size:13px}.table-container{overflow-x:auto}.table{border-collapse:collapse;width:100%}.table th,.table td{text-align:left;border-bottom:1px solid var(--color-border-light);padding:12px 16px}.table th{text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-secondary);background-color:var(--color-background);font-size:11px;font-weight:600}.table tr:hover td{background-color:var(--color-background)}.status-badge{border-radius:50px;align-items:center;padding:3px 10px;font-size:11px;font-weight:600;display:inline-flex}.status-badge.new,.status-badge.pending{color:#2563eb;background-color:#eff6ff}.status-badge.device_received,.status-badge.diagnosing,.status-badge.working,.status-badge.in_progress{color:#d97706;background-color:#fffbeb}.status-badge.ready_for_pickup,.status-badge.confirmed{color:#16a34a;background-color:#f0fdf4}.status-badge.closed,.status-badge.completed{color:#64748b;background-color:#f1f5f9}.status-badge.awaiting_approval,.status-badge.rejected{color:#dc2626;background-color:#fef2f2}.dark .status-badge.new,.dark .status-badge.pending{background-color:#2563eb33}.dark .status-badge.device_received,.dark .status-badge.diagnosing,.dark .status-badge.working,.dark .status-badge.in_progress{background-color:#d9770633}.dark .status-badge.ready_for_pickup,.dark .status-badge.confirmed{background-color:#16a34a33}.dark .status-badge.awaiting_approval,.dark .status-badge.rejected{background-color:#dc262633}.btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:8px;height:36px;padding:8px 16px;font-family:Outfit,sans-serif;font-size:13px;font-weight:600;transition:all .15s;display:inline-flex}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:hover{background-color:var(--color-primary-dark)}.btn-secondary{background-color:var(--color-surface);color:var(--color-text-primary);border:1px solid var(--color-border)}.btn-secondary:hover{background-color:var(--color-background)}.btn-danger{background-color:var(--color-error);color:#fff}.btn-danger:hover{background-color:#b91c1c}.btn-success{background-color:var(--color-success);color:#fff}.btn-success:hover{background-color:#15803d}.btn-ghost{color:var(--color-text-secondary);background:0 0;border:none}.btn-ghost:hover{background-color:var(--color-background);color:var(--color-text-primary)}.btn-sm{height:28px;padding:4px 8px;font-size:12px}.btn-lg{height:44px;padding:12px 24px;font-size:15px}.form-group{margin-bottom:16px}.form-label{color:var(--color-text-secondary);margin-bottom:6px;font-size:13px;font-weight:600;display:block}.form-input{border:1px solid var(--color-border);background-color:var(--color-surface);width:100%;color:var(--color-text-primary);border-radius:8px;padding:10px 12px;font-family:Outfit,sans-serif;font-size:14px;transition:border-color .15s,box-shadow .15s}.form-input:focus{border-color:var(--color-primary);outline:none;box-shadow:0 0 0 3px #2563eb1a}.form-input::placeholder{color:var(--color-text-tertiary)}textarea.form-input{resize:vertical;min-height:100px}.tabs{background-color:var(--color-background);border:1px solid var(--color-border);border-radius:8px;gap:4px;margin-bottom:24px;padding:4px;display:flex}.tab{color:var(--color-text-secondary);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:8px 16px;font-size:14px;font-weight:500;transition:all .15s}.tab:hover{color:var(--color-text-primary)}.tab.active{background-color:var(--color-surface);color:var(--color-text-primary);box-shadow:var(--shadow-sm)}.modal-overlay{z-index:1000;background-color:#00000080;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal{background-color:var(--color-surface);border-radius:12px;width:100%;max-width:500px;max-height:90vh;overflow-y:auto}.modal-header{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.modal-title{color:var(--color-text-primary);font-size:18px;font-weight:700}.modal-close{width:32px;height:32px;color:var(--color-text-tertiary);cursor:pointer;background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;transition:all .15s;display:flex}.modal-close:hover{background-color:var(--color-background);color:var(--color-text-primary)}.modal-body{padding:24px}.modal-footer{border-top:1px solid var(--color-border);justify-content:flex-end;gap:12px;padding:16px 24px;display:flex}.chat-layout{height:calc(100vh - var(--header-height) - 48px);background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;grid-template-columns:300px 1fr;gap:0;display:grid;overflow:hidden}.chat-list{border-right:1px solid var(--color-border);overflow-y:auto}.chat-list-header{border-bottom:1px solid var(--color-border);padding:16px;font-size:14px;font-weight:600}.chat-item{border-bottom:1px solid var(--color-border-light);cursor:pointer;gap:12px;padding:12px 16px;transition:background-color .15s;display:flex}.chat-item:hover{background-color:var(--color-background)}.chat-item.active{background-color:var(--color-primary);color:#fff}.chat-item.active .chat-item-subtitle,.chat-item.active .chat-item-time{color:#fffc}.chat-item-content{flex:1;min-width:0}.chat-item-header{justify-content:space-between;align-items:center;margin-bottom:4px;display:flex}.chat-item-title{white-space:nowrap;text-overflow:ellipsis;font-size:14px;font-weight:600;overflow:hidden}.chat-item-time{color:var(--color-text-tertiary);font-size:11px}.chat-item-subtitle{color:var(--color-text-secondary);white-space:nowrap;text-overflow:ellipsis;font-size:12px;overflow:hidden}.chat-unread-badge{background-color:var(--color-error);color:#fff;border-radius:50px;justify-content:center;align-items:center;min-width:20px;height:20px;padding:0 6px;font-size:11px;font-weight:600;display:flex}.chat-window{flex-direction:column;display:flex}.chat-window-header{border-bottom:1px solid var(--color-border);padding:16px 20px}.chat-messages{flex-direction:column;flex:1;gap:12px;padding:20px;display:flex;overflow-y:auto}.message{border-radius:12px;max-width:70%;padding:10px 14px;font-size:14px}.message.own{background-color:var(--color-primary);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}.message.other{background-color:var(--color-background);border-bottom-left-radius:4px;align-self:flex-start}.message-time{opacity:.7;text-align:right;margin-top:4px;font-size:10px}.message-image{cursor:pointer;border-radius:8px;max-width:200px}.chat-input{border-top:1px solid var(--color-border);background-color:var(--color-background);gap:8px;padding:16px;display:flex}.chat-input input{border:1px solid var(--color-border);background-color:var(--color-surface);color:var(--color-text-primary);border-radius:50px;flex:1;padding:10px 16px;font-size:14px}.chat-input input:focus{border-color:var(--color-primary);outline:none}.chat-empty{color:var(--color-text-tertiary);flex:1;justify-content:center;align-items:center;display:flex}.loading{color:var(--color-text-tertiary);justify-content:center;align-items:center;padding:48px;display:flex}.spinner{border:2px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;width:24px;height:24px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;color:var(--color-text-tertiary);padding:48px}.empty-state svg{opacity:.5;width:64px;height:64px;margin-bottom:16px}.empty-state h3{color:var(--color-text-secondary);margin-bottom:8px;font-size:16px;font-weight:600}.login-page{background-color:var(--color-background);justify-content:center;align-items:center;min-height:100vh;display:flex}.login-card{background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:16px;width:100%;max-width:400px;padding:40px}.login-logo{text-align:center;margin-bottom:32px}.login-logo h1{color:var(--color-text-primary);font-family:Outfit,sans-serif;font-size:24px;font-weight:700}.login-logo p{color:var(--color-text-secondary);margin-top:8px;font-size:14px}.login-error{color:#dc2626;background-color:#fef2f2;border-radius:8px;margin-bottom:16px;padding:12px 16px;font-size:14px}.dark .login-error{color:#fca5a5;background-color:#dc262633}@media (width<=1024px){.sidebar{display:none}.main-content{margin-left:0}.chat-layout{grid-template-columns:1fr}.chat-list{display:none}}