:root{--color-primary:#0d9488;--color-primary-dark:#0f766e;--color-primary-light:#5eead4;--color-primary-xlight:#ccfbf1;--color-background:#f8fafc;--color-surface:#fff;--color-surface-secondary:#f1f5f9;--color-text-primary:#0f172a;--color-text-secondary:#64748b;--color-text-tertiary:#94a3b8;--color-border:#e2e8f0;--color-border-light:#f1f5f9;--color-success:#0d9488;--color-success-light:#ccfbf1;--color-warning:#f59e0b;--color-error:#ef4444;--color-info:#3b82f6;--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:260px;--header-height:64px}.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:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5}a{color:var(--color-primary);text-decoration:none}a:hover{color:var(--color-primary-dark)}button{cursor:pointer;font-family:inherit}input,textarea,select{font-family:inherit}::-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(--color-surface);border-right:1px solid var(--color-border);z-index:100;flex-direction:column;display:flex;position:fixed;top:0;bottom:0;left:0}.sidebar-logo{padding:var(--spacing-lg);border-bottom:1px solid var(--color-border);align-items:center;gap:var(--spacing-md);display:flex}.sidebar-logo h1{color:var(--color-primary);font-size:1.25rem;font-weight:700}.sidebar-nav{padding:var(--spacing-md);flex:1;overflow-y:auto}.nav-item{align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);border-radius:var(--radius-md);color:var(--color-text-secondary);margin-bottom:var(--spacing-xs);transition:all .15s;display:flex}.nav-item:hover{background-color:var(--color-surface-secondary);color:var(--color-text-primary)}.nav-item.active{background-color:var(--color-primary);color:#fff}.nav-item svg{width:20px;height:20px}.sidebar-footer{padding:var(--spacing-md);border-top:1px solid var(--color-border)}.main-content{margin-left:var(--sidebar-width);flex-direction:column;flex:1;display:flex}.header{height:var(--header-height);background-color:var(--color-surface);border-bottom:1px solid var(--color-border);padding:0 var(--spacing-lg);z-index:50;justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}.header-left,.header-right{align-items:center;gap:var(--spacing-md);display:flex}.search-input{background-color:var(--color-surface-secondary);border-radius:var(--radius-md);padding:var(--spacing-sm) var(--spacing-md);align-items:center;min-width:300px;display:flex}.search-input input{width:100%;color:var(--color-text-primary);margin-left:var(--spacing-sm);background:0 0;border:none;outline:none;font-size:.875rem}.search-input input::placeholder{color:var(--color-text-tertiary)}.language-selector{align-items:center;gap:var(--spacing-xs);background-color:var(--color-surface-secondary);border-radius:var(--radius-md);padding:var(--spacing-xs);display:flex}.language-btn{padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);color:var(--color-text-secondary);background:0 0;border:none;font-size:.875rem;transition:all .15s}.language-btn:hover{background-color:var(--color-surface)}.language-btn.active{background-color:var(--color-surface);color:var(--color-text-primary);font-weight:500}.theme-toggle{border-radius:var(--radius-md);background-color:var(--color-surface-secondary);width:40px;height:40px;color:var(--color-text-secondary);border:none;justify-content:center;align-items:center;transition:all .15s;display:flex}.theme-toggle:hover{background-color:var(--color-border);color:var(--color-text-primary)}.page-content{padding:var(--spacing-lg);flex:1;overflow-y:auto}.page-title{margin-bottom:var(--spacing-lg);font-size:1.5rem;font-weight:600}.card{background-color:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);padding:var(--spacing-lg)}.card-header{margin-bottom:var(--spacing-md);justify-content:space-between;align-items:center;display:flex}.card-title{font-size:1rem;font-weight:600}.stats-grid{gap:var(--spacing-md);margin-bottom:var(--spacing-lg);grid-template-columns:repeat(auto-fit,minmax(200px,1fr));display:grid}.stat-card{background-color:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);padding:var(--spacing-lg)}.stat-value{color:var(--color-primary);font-size:2rem;font-weight:700}.stat-label{color:var(--color-text-secondary);margin-top:var(--spacing-xs);font-size:.875rem}.table-container{overflow-x:auto}.table{border-collapse:collapse;width:100%}.table th,.table td{padding:var(--spacing-md);text-align:left;border-bottom:1px solid var(--color-border)}.table th{text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-secondary);background-color:var(--color-surface-secondary);font-size:.75rem;font-weight:600}.table tr:hover td{background-color:var(--color-surface-secondary)}.status-badge{padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-full);align-items:center;font-size:.75rem;font-weight:500;display:inline-flex}.status-badge.new,.status-badge.pending{color:#1d4ed8;background-color:#dbeafe}.status-badge.device_received,.status-badge.confirmed{color:#047857;background-color:#d1fae5}.status-badge.diagnosing,.status-badge.working{color:#b45309;background-color:#fef3c7}.status-badge.awaiting_approval{color:#b91c1c;background-color:#fee2e2}.status-badge.ready_for_pickup{color:#047857;background-color:#d1fae5}.status-badge.closed,.status-badge.completed{background-color:var(--color-surface-secondary);color:var(--color-text-secondary)}.status-badge.rejected{color:#b91c1c;background-color:#fee2e2}.dark .status-badge.new,.dark .status-badge.pending{background-color:#1e3a5f}.dark .status-badge.device_received,.dark .status-badge.confirmed{background-color:#064e3b}.dark .status-badge.diagnosing,.dark .status-badge.working{background-color:#78350f}.dark .status-badge.awaiting_approval{background-color:#7f1d1d}.dark .status-badge.ready_for_pickup{background-color:#064e3b}.dark .status-badge.rejected{background-color:#7f1d1d}.btn{justify-content:center;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);border:none;font-size:.875rem;font-weight:500;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-secondary);color:var(--color-text-primary)}.btn-secondary:hover{background-color:var(--color-border)}.btn-danger{background-color:var(--color-error);color:#fff}.btn-danger:hover{background-color:#dc2626}.btn-success{background-color:var(--color-success);color:#fff}.btn-success:hover{background-color:#0f766e}.btn-ghost{color:var(--color-text-secondary);background:0 0}.btn-ghost:hover{background-color:var(--color-surface-secondary);color:var(--color-text-primary)}.btn-sm{padding:var(--spacing-xs) var(--spacing-sm);font-size:.75rem}.btn-lg{padding:var(--spacing-md) var(--spacing-lg);font-size:1rem}.form-group{margin-bottom:var(--spacing-md)}.form-label{margin-bottom:var(--spacing-xs);color:var(--color-text-primary);font-size:.875rem;font-weight:500;display:block}.form-input{width:100%;padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-surface);color:var(--color-text-primary);font-size:.875rem;transition:border-color .15s}.form-input:focus{border-color:var(--color-primary);outline:none}.form-input::placeholder{color:var(--color-text-tertiary)}textarea.form-input{resize:vertical;min-height:100px}.tabs{gap:var(--spacing-xs);background-color:var(--color-surface-secondary);padding:var(--spacing-xs);border-radius:var(--radius-md);margin-bottom:var(--spacing-lg);display:flex}.tab{padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-sm);color:var(--color-text-secondary);background:0 0;border:none;font-size:.875rem;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;display:flex;position:fixed;inset:0}.modal{background-color:var(--color-surface);border-radius:var(--radius-lg);padding:var(--spacing-lg);width:90%;max-width:500px;max-height:90vh;overflow-y:auto}.modal-header{margin-bottom:var(--spacing-lg);justify-content:space-between;align-items:center;display:flex}.modal-title{font-size:1.25rem;font-weight:600}.modal-close{border-radius:var(--radius-full);width:32px;height:32px;color:var(--color-text-secondary);background:0 0;border:none;justify-content:center;align-items:center;transition:all .15s;display:flex}.modal-close:hover{background-color:var(--color-surface-secondary);color:var(--color-text-primary)}.modal-footer{justify-content:flex-end;gap:var(--spacing-sm);margin-top:var(--spacing-lg);display:flex}.chat-layout{height:calc(100vh - var(--header-height) - var(--spacing-lg) * 2);background-color:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);grid-template-columns:320px 1fr;gap:0;display:grid;overflow:hidden}.chat-list{border-right:1px solid var(--color-border);overflow-y:auto}.chat-list-header{padding:var(--spacing-md);border-bottom:1px solid var(--color-border);font-weight:600}.chat-item{gap:var(--spacing-md);padding:var(--spacing-md);border-bottom:1px solid var(--color-border-light);cursor:pointer;transition:background-color .15s;display:flex}.chat-item:hover{background-color:var(--color-surface-secondary)}.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{margin-bottom:var(--spacing-xs);justify-content:space-between;align-items:center;display:flex}.chat-item-title{white-space:nowrap;text-overflow:ellipsis;font-size:.875rem;font-weight:600;overflow:hidden}.chat-item-time{color:var(--color-text-tertiary);font-size:.75rem}.chat-item-subtitle{color:var(--color-text-secondary);white-space:nowrap;text-overflow:ellipsis;font-size:.75rem;overflow:hidden}.chat-unread-badge{border-radius:var(--radius-full);background-color:var(--color-error);color:#fff;justify-content:center;align-items:center;min-width:20px;height:20px;padding:0 6px;font-size:.75rem;font-weight:600;display:flex}.chat-window{flex-direction:column;display:flex}.chat-window-header{padding:var(--spacing-md) var(--spacing-lg);border-bottom:1px solid var(--color-border)}.chat-messages{padding:var(--spacing-lg);gap:var(--spacing-md);flex-direction:column;flex:1;display:flex;overflow-y:auto}.message{max-width:70%;padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-lg)}.message.own{background-color:var(--color-primary);color:#fff;border-bottom-right-radius:var(--spacing-xs);align-self:flex-end}.message.other{background-color:var(--color-surface-secondary);border-bottom-left-radius:var(--spacing-xs);align-self:flex-start}.message-time{opacity:.7;margin-top:var(--spacing-xs);text-align:right;font-size:.625rem}.message-image{border-radius:var(--radius-md);cursor:pointer;max-width:200px}.chat-input{gap:var(--spacing-sm);padding:var(--spacing-md);border-top:1px solid var(--color-border);background-color:var(--color-surface-secondary);display:flex}.chat-input input{padding:var(--spacing-sm) var(--spacing-md);border:1px solid var(--color-border);border-radius:var(--radius-full);background-color:var(--color-surface);color:var(--color-text-primary);flex:1;font-size:.875rem}.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{padding:var(--spacing-xl);color:var(--color-text-tertiary);justify-content:center;align-items:center;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;padding:var(--spacing-xxl);color:var(--color-text-tertiary)}.empty-state svg{width:64px;height:64px;margin-bottom:var(--spacing-md);opacity:.5}.empty-state h3{margin-bottom:var(--spacing-sm);color:var(--color-text-secondary);font-size:1.125rem;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-radius:var(--radius-xl);border:1px solid var(--color-border);padding:var(--spacing-xl);width:100%;max-width:400px}.login-logo{text-align:center;margin-bottom:var(--spacing-xl)}.login-logo h1{color:var(--color-primary);font-size:1.5rem;font-weight:700}.login-logo p{color:var(--color-text-secondary);margin-top:var(--spacing-xs);font-size:.875rem}.login-error{color:#b91c1c;padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);margin-bottom:var(--spacing-md);background-color:#fee2e2;font-size:.875rem}.dark .login-error{color:#fecaca;background-color:#7f1d1d}@media (width<=1024px){.sidebar{display:none}.main-content{margin-left:0}.chat-layout{grid-template-columns:1fr}.chat-list{display:none}}