:root{--hue-primary: 250;--hue-bg: 240;--color-primary: hsl(var(--hue-primary), 70%, 65%);--color-primary-hover: hsl(var(--hue-primary), 75%, 70%);--color-primary-transparent: hsla(var(--hue-primary), 70%, 65%, .15);--bg-app: hsl(var(--hue-bg), 10%, 8%);--bg-panel: hsl(var(--hue-bg), 10%, 12%);--bg-element: hsl(var(--hue-bg), 10%, 16%);--bg-hover: hsl(var(--hue-bg), 10%, 20%);--text-main: hsl(var(--hue-bg), 10%, 95%);--text-muted: hsl(var(--hue-bg), 5%, 60%);--border-color: hsl(var(--hue-bg), 5%, 20%);--color-success: #10B981;--color-error: #EF4444;--color-warning: #F59E0B;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4), 0 2px 4px -1px rgba(0, 0, 0, .2);--font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--sidebar-width: 260px;--sidebar-width-collapsed: 72px;--header-height: 64px;--transition-speed: .3s;--radius-sm: 6px;--radius-md: 10px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-app);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg-element);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--bg-hover)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .5s ease-out}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}.card{background-color:var(--bg-panel);padding:1.5rem;border-radius:var(--radius-md);border:1px solid var(--border-color);transition:transform .2s ease,border-color .2s ease}.card:hover{transform:translateY(-4px);border-color:var(--color-primary)}.card h1,.card h2,.card h3{color:var(--text-main);margin-bottom:1rem}.card p{color:var(--text-muted);font-size:.95rem}.btn{display:inline-flex;align-items:center;justify-content:center;background-color:var(--color-primary);color:#fff;border:none;padding:.6rem 1.2rem;border-radius:var(--radius-sm);cursor:pointer;font-weight:500;font-family:var(--font-sans);transition:background-color .2s,transform .1s;text-decoration:none}.btn:hover{background-color:var(--color-primary-hover)}.btn:active{transform:scale(.98)}.btn-secondary{background-color:var(--bg-element);color:var(--text-main)}.btn-secondary:hover{background-color:var(--bg-hover)}.form-group{margin-bottom:1.5rem}.form-group label{display:block;font-size:.875rem;font-weight:500;color:var(--text-muted);margin-bottom:.5rem}.input,.select{width:100%;padding:.75rem 1rem;background-color:var(--bg-element);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-main);font-family:var(--font-sans);font-size:.95rem;transition:border-color .2s,box-shadow .2s}.input:focus,.select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 2px var(--color-primary-transparent)}.input::placeholder{color:hsla(var(--hue-bg),5%,50%,.5)}.select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1rem center;background-size:1rem}body{overflow:hidden}.app-header{height:var(--header-height);padding:0 2rem;background-color:var(--bg-panel);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;width:100%}.header-left{display:flex;align-items:center;gap:1rem}.header-title{font-size:1.1rem;font-weight:600;color:var(--text-main)}.breadcrumb{color:var(--text-muted);font-size:.9rem}.header-right{display:flex;align-items:center;gap:1rem}.user-avatar{width:36px;height:36px;border-radius:50%;background-color:var(--bg-element);display:flex;align-items:center;justify-content:center;color:var(--text-muted);border:1px solid var(--border-color);cursor:pointer}.mobile-toggle{display:none;background:none;border:none;color:var(--text-main);cursor:pointer;padding:.5rem;margin-left:-.5rem}@media(max-width:768px){.mobile-toggle{display:flex}.app-header{padding:0 1rem}}.sidebar{width:var(--sidebar-width);height:100%;background-color:var(--bg-panel);border-right:1px solid var(--border-color);display:flex;flex-direction:column;transition:width var(--transition-speed) ease;overflow-y:auto;overflow-x:hidden;position:relative;z-index:10}.sidebar.collapsed{width:var(--sidebar-width-collapsed)}.sidebar-header{height:var(--header-height);display:flex;align-items:center;justify-content:space-between;padding:0 1.5rem;border-bottom:1px solid var(--border-color);white-space:nowrap}.collapsed .sidebar-header{justify-content:center;padding:0}.brand-link{font-weight:700;font-size:1.25rem;color:var(--text-main);text-decoration:none;display:flex;align-items:center;gap:.75rem}.brand-logo{min-width:32px;width:32px;height:32px;background:var(--color-primary);border-radius:6px;display:flex;align-items:center;justify-content:center;color:#fff}.brand-text{transition:opacity .2s}.collapsed .brand-text{opacity:0;width:0;display:none}.sidebar-nav{display:flex;flex-direction:column;padding:1rem 0;gap:.25rem}.nav-item-container{display:flex;flex-direction:column}.nav-item{display:flex;align-items:center;padding:.75rem 1.5rem;color:var(--text-muted);text-decoration:none;transition:all .2s;cursor:pointer;border:none;background:none;width:100%;text-align:left;font-family:inherit;font-size:.95rem;position:relative}.collapsed .nav-item{justify-content:center;padding:.75rem 0}.nav-item:hover,.nav-item.active{color:var(--text-main);background-color:var(--bg-element)}.nav-item.active{color:var(--color-primary);background-color:var(--color-primary-transparent)}.nav-item.active:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background-color:var(--color-primary)}.item-icon{min-width:20px;height:20px}.item-label{margin-left:1rem;white-space:nowrap;flex-grow:1}.collapsed .item-label,.collapsed .expand-icon{display:none}.sub-menu{display:flex;flex-direction:column;background-color:#0000001a;overflow:hidden;max-height:0;transition:max-height .3s ease}.sub-menu.open{max-height:500px}.sub-item{padding-left:3.25rem;font-size:.9rem}.collapsed .sub-menu{display:none}@media(max-width:768px){.sidebar{position:fixed;left:-100%;top:0;bottom:0;width:var(--sidebar-width);transition:left .3s ease}.sidebar.mobile-open{left:0;box-shadow:var(--shadow-md)}.mobile-overlay{position:fixed;inset:0;background-color:#00000080;z-index:5;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.sidebar.collapsed{width:var(--sidebar-width)}}.icon-btn{background:none;border:none;cursor:pointer;color:var(--text-muted);display:flex;align-items:center;justify-content:center}.toast-container{position:fixed;top:1.5rem;right:1.5rem;z-index:9999;display:flex;flex-direction:column;gap:.75rem;pointer-events:none}.toast{display:flex;align-items:center;min-width:300px;max-width:450px;padding:1rem;background-color:var(--bg-panel);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-md);color:var(--text-main);pointer-events:auto;animation:toast-slide-in .3s ease-out forwards}@keyframes toast-slide-in{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:translate(0)}}.toast-icon{display:flex;align-items:center;justify-content:center;margin-right:.75rem;flex-shrink:0}.toast-content{flex-grow:1;font-size:.9rem;line-height:1.4}.toast-close{background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:.25rem;margin-left:.5rem;display:flex;align-items:center;justify-content:center;transition:color .2s}.toast-close:hover{color:var(--text-main)}.toast-success{border-left:4px solid var(--color-success)}.toast-success .toast-icon{color:var(--color-success)}.toast-error{border-left:4px solid var(--color-error)}.toast-error .toast-icon{color:var(--color-error)}.toast-warning{border-left:4px solid var(--color-warning)}.toast-warning .toast-icon{color:var(--color-warning)}.toast-info{border-left:4px solid var(--color-primary)}.toast-info .toast-icon{color:var(--color-primary)}.app-layout{display:flex;height:100vh;width:100vw;overflow:hidden;background-color:var(--bg-app)}.main-content{flex:1;display:flex;flex-direction:column;height:100%;overflow:hidden;position:relative;transition:margin-left .3s ease}.page-content{flex:1;overflow-y:auto;padding:2rem;position:relative}@media(max-width:768px){.page-content{padding:1rem}}.settings-container{padding:var(--spacing-lg, 2rem);max-width:800px;margin:0 auto}.settings-header{margin-bottom:2rem}.settings-header h1{font-size:2rem;font-weight:700;color:var(--text-main);margin-bottom:.5rem}.settings-header p{color:var(--text-muted)}.settings-form{max-width:600px}.form-actions{margin-top:2rem;display:flex;align-items:center;gap:1.5rem}.save-indicator{color:#10b981;font-size:.875rem;font-weight:500;animation:fadeIn .3s ease-out}@media(max-width:768px){.settings-container{padding:1.5rem}}