: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;--input-bg:#fff;--input-border:#e2e8f0;--table-header-bg:#f8fafc;--table-row-hover:#f1f5f9;--modal-bg:#fff;--modal-overlay:#00000080;--divider-color:#e2e8f0;--card-bg:#fff;--card-border:#e2e8f0;--card-shadow:0 1px 3px #0000001a;--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:#1e293b;--color-text-primary:#f8fafc;--color-text-secondary:#94a3b8;--color-text-tertiary:#64748b;--color-border:#ffffff14;--color-border-light:#ffffff0a;--input-bg:#1e293b;--input-border:#ffffff1f;--table-header-bg:#1e293b;--table-row-hover:#ffffff0d;--modal-bg:#1e293b;--modal-overlay:#000000b3;--divider-color:#ffffff0f;--card-bg:#1e293b;--card-border:#ffffff14;--card-shadow:0 1px 3px 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.2s}.table th{background-color:var(--table-header-bg);color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.5px;text-align:left;border-bottom:1px solid var(--color-border);padding:12px 16px;font-size:11px;font-weight:600}.table td{border-bottom:1px solid var(--color-border);color:var(--color-text-primary);padding:12px 16px}.table tbody tr:hover{background-color:var(--table-row-hover)}.btn{border-radius:var(--radius-md);border:none;justify-content:center;align-items:center;gap:8px;padding:10px 16px;font-size:14px;font-weight:600;transition:all .15s;display:inline-flex}.btn-secondary{background-color:var(--color-surface);color:var(--color-text-primary);border:1px solid var(--color-border)}.modal-overlay{background-color:var(--modal-overlay);z-index:1000;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background-color:var(--modal-bg);border-radius:var(--radius-lg);max-width:90vw;max-height:90vh;box-shadow:var(--shadow-lg);overflow:auto}.dark input,.dark textarea,.dark select{background-color:var(--input-bg);border-color:var(--input-border);color:var(--color-text-primary)}.dark input:focus,.dark textarea:focus,.dark select:focus{border-color:var(--color-primary);outline:none;box-shadow:0 0 0 3px #2563eb33}.page-content{padding:var(--spacing-lg);background-color:var(--color-background);min-height:calc(100vh - var(--header-height))}.page-title{color:var(--color-text-primary);margin-bottom:var(--spacing-lg);font-size:24px;font-weight:700}::-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)}.dark::-webkit-scrollbar-track{background:var(--color-background)}.dark::-webkit-scrollbar-thumb{background:#fff3}.loading{justify-content:center;align-items:center;padding:48px;display:flex}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;color:var(--color-text-secondary);padding:48px 24px}.empty-state h3{color:var(--color-text-primary);margin-bottom:8px;font-size:18px;font-weight:600}.transition-colors{transition:background-color .2s,border-color .2s,color .2s}.sticky-note{background:linear-gradient(135deg,#fef3c7 0%,#fde68a 100%);border:1px solid #fcd34d;border-radius:6px;margin-bottom:8px;padding:10px 12px;position:relative;box-shadow:2px 2px 4px #0000001a}.sticky-note:before{content:"📌";font-size:14px;position:absolute;top:-8px;left:10px}.sticky-note-content{color:#78350f;font-size:13px;line-height:1.4}.sticky-note-meta{color:#92400e;opacity:.7;margin-top:6px;font-size:10px}.dark .sticky-note{background:linear-gradient(135deg,#422006 0%,#451a03 100%);border-color:#78350f}.dark .sticky-note-content{color:#fef3c7}.dark .sticky-note-meta{color:#fde68a}.status-dropdown{display:inline-block;position:relative}.status-dropdown-trigger{border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text-primary);cursor:pointer;align-items:center;gap:6px;padding:8px 14px;font-size:13px;font-weight:600;transition:all .15s;display:flex}.status-dropdown-trigger:hover{border-color:var(--color-primary)}.status-dropdown-menu{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);min-width:200px;box-shadow:var(--shadow-lg);z-index:100;position:absolute;top:calc(100% + 4px);right:0;overflow:hidden}.status-dropdown-item{color:var(--color-text-primary);cursor:pointer;align-items:center;gap:10px;padding:10px 14px;font-size:13px;transition:background .1s;display:flex}.status-dropdown-item:hover{background:var(--table-row-hover)}.status-dropdown-item.active{background:var(--color-primary-xlight);color:var(--color-primary)}.slide-panel{width:600px;max-width:calc(100vw - var(--sidebar-width));background:var(--color-surface);z-index:200;height:100vh;transition:transform .3s;position:fixed;top:0;right:0;overflow-y:auto;transform:translate(100%);box-shadow:-4px 0 24px #00000026}.slide-panel.open{transform:translate(0)}.slide-panel-overlay{inset:0;left:var(--sidebar-width);z-index:199;opacity:0;pointer-events:none;background:#0000004d;transition:opacity 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var(--color-border)}.invoice-btn-secondary:hover{background:var(--color-surface-secondary)}.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 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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 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.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}.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}}