:root{--color-bg-primary: #0f1117;--color-bg-secondary: #1a1d27;--color-bg-tertiary: #242837;--color-bg-elevated: #2a2e3d;--color-text-primary: #e8eaf0;--color-text-secondary: #a0a4b8;--color-text-muted: #6b7084;--color-border: #2e3345;--color-border-hover: #3d4259;--color-accent: #6366f1;--color-accent-hover: #818cf8;--color-accent-muted: rgba(99, 102, 241, .15);--color-success: #22c55e;--color-warning: #f59e0b;--color-error: #ef4444;--color-info: #3b82f6;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 2rem;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .5);--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .3s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);background-color:var(--color-bg-primary);color:var(--color-text-primary);line-height:1.6;min-height:100vh}.container{width:100%;max-width:1440px;margin:0 auto;padding:0 var(--spacing-md)}@media (min-width: 640px){.container{padding:0 var(--spacing-lg)}}@media (min-width: 1024px){.container{padding:0 var(--spacing-xl)}}@media (min-width: 1920px){.container{max-width:1800px}}input,textarea,select,button{font-family:inherit;font-size:inherit}input,textarea,select{background-color:var(--color-bg-tertiary);border:1px solid var(--color-border);border-radius:var(--radius-md);color:var(--color-text-primary);padding:var(--spacing-sm) var(--spacing-md);transition:border-color var(--transition-fast);width:100%}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--color-accent);box-shadow:0 0 0 2px var(--color-accent-muted)}input::placeholder,textarea::placeholder{color:var(--color-text-muted)}button{cursor:pointer;border:none;border-radius:var(--radius-md);padding:var(--spacing-sm) var(--spacing-lg);font-weight:500;transition:background-color var(--transition-fast),transform var(--transition-fast)}button:active{transform:scale(.98)}.btn-primary{background-color:var(--color-accent);color:#fff}.btn-primary:hover{background-color:var(--color-accent-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background-color:var(--color-bg-tertiary);color:var(--color-text-primary);border:1px solid var(--color-border)}.btn-secondary:hover{background-color:var(--color-bg-elevated);border-color:var(--color-border-hover)}a{color:var(--color-accent);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-accent-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:0}.error-message{color:var(--color-error);font-size:var(--font-size-sm);margin-top:var(--spacing-xs)}.auth-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:var(--spacing-md)}.auth-card{background-color:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--spacing-2xl);width:100%;max-width:420px;box-shadow:var(--shadow-lg)}.auth-card h1{font-size:var(--font-size-2xl);margin-bottom:var(--spacing-xs)}.auth-subtitle{color:var(--color-text-secondary);margin-bottom:var(--spacing-xl)}.auth-card form{display:flex;flex-direction:column;gap:var(--spacing-md)}.form-group{display:flex;flex-direction:column;gap:var(--spacing-xs)}.form-group label{font-size:var(--font-size-sm);font-weight:500;color:var(--color-text-secondary)}.form-hint{font-size:var(--font-size-xs);color:var(--color-text-muted)}.auth-submit{margin-top:var(--spacing-sm);padding:var(--spacing-md);font-size:var(--font-size-base)}.auth-footer{text-align:center;margin-top:var(--spacing-lg);color:var(--color-text-secondary);font-size:var(--font-size-sm)}.dashboard-page{min-height:100vh}.dashboard-header{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md) var(--spacing-xl);border-bottom:1px solid var(--color-border);background-color:var(--color-bg-secondary)}.dashboard-header h1{font-size:var(--font-size-xl)}.header-actions{display:flex;align-items:center;gap:var(--spacing-md)}.user-email{color:var(--color-text-secondary);font-size:var(--font-size-sm)}.dashboard-content{padding:var(--spacing-2xl)}.dashboard-content h2{margin-bottom:var(--spacing-sm)}.text-muted{color:var(--color-text-muted)}.loading-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;color:var(--color-text-secondary)}@media (max-width: 639px){.auth-card{padding:var(--spacing-lg)}.dashboard-header{flex-direction:column;gap:var(--spacing-sm);padding:var(--spacing-md)}}.dashboard-layout{display:flex;min-height:100vh}.dashboard-sidebar{width:240px;background-color:var(--color-bg-secondary);border-right:1px solid var(--color-border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;transition:transform var(--transition-base)}.sidebar-header{display:flex;align-items:center;padding:var(--spacing-lg);border-bottom:1px solid var(--color-border)}.sidebar-header h1{font-size:var(--font-size-xl);font-weight:700;color:var(--color-text-primary)}.sidebar-nav{flex:1;padding:var(--spacing-md) 0;overflow-y:auto}.sidebar-nav ul{list-style:none}.nav-item{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-lg);color:var(--color-text-secondary);font-size:var(--font-size-sm);font-weight:500;cursor:pointer;transition:background-color var(--transition-fast),color var(--transition-fast);border:none;background:none;width:100%;text-align:left}.nav-item:hover{background-color:var(--color-bg-tertiary);color:var(--color-text-primary)}.nav-item.active{background-color:var(--color-accent-muted);color:var(--color-accent)}.nav-item-icon{width:18px;height:18px;display:flex;align-items:center;justify-content:center;font-size:var(--font-size-base)}.sidebar-footer{padding:var(--spacing-md) var(--spacing-lg);border-top:1px solid var(--color-border)}.sidebar-user{display:flex;align-items:center;gap:var(--spacing-sm)}.sidebar-user-email{font-size:var(--font-size-xs);color:var(--color-text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}.sidebar-logout-btn{font-size:var(--font-size-xs);color:var(--color-text-muted);padding:var(--spacing-xs) var(--spacing-sm);background:none;border:1px solid var(--color-border);border-radius:var(--radius-sm)}.sidebar-logout-btn:hover{color:var(--color-text-primary);border-color:var(--color-border-hover)}.dashboard-main{flex:1;margin-left:240px;display:flex;flex-direction:column;min-height:100vh}.dashboard-topbar{display:flex;align-items:center;justify-content:space-between;padding:var(--spacing-md) var(--spacing-xl);border-bottom:1px solid var(--color-border);background-color:var(--color-bg-primary);position:sticky;top:0;z-index:50}.dashboard-topbar h2{font-size:var(--font-size-lg);font-weight:600}.dashboard-body{flex:1;padding:var(--spacing-xl);overflow-y:auto}.dashboard-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-md);margin-bottom:var(--spacing-xl)}.stat-card{background-color:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-lg)}.stat-card-label{font-size:var(--font-size-xs);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:var(--spacing-xs)}.stat-card-value{font-size:var(--font-size-2xl);font-weight:700;color:var(--color-text-primary)}.dashboard-section-heading{font-size:var(--font-size-base);font-weight:600;color:var(--color-text-secondary);margin-bottom:var(--spacing-md)}.item-grid{column-count:4;column-gap:var(--spacing-md)}.item-grid-empty{text-align:center;padding:var(--spacing-2xl);color:var(--color-text-muted)}@media (max-width: 2559px){.item-grid{column-count:4}}@media (max-width: 1439px){.item-grid{column-count:3}}@media (max-width: 1023px){.item-grid{column-count:2}}@media (max-width: 639px){.item-grid{column-count:1}}@media (min-width: 1920px){.item-grid{column-count:5}}.item-card{break-inside:avoid;background-color:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-lg);margin-bottom:var(--spacing-md);overflow:hidden;transition:border-color var(--transition-fast),box-shadow var(--transition-fast);cursor:pointer}.item-card:hover{border-color:var(--color-border-hover);box-shadow:var(--shadow-md)}.item-card:focus-within{outline:2px solid var(--color-accent);outline-offset:2px}.item-card-thumbnail{width:100%;height:140px;object-fit:cover;display:block;background-color:var(--color-bg-tertiary)}.item-card-body{padding:var(--spacing-md)}.item-card-title{font-size:var(--font-size-sm);font-weight:600;color:var(--color-text-primary);margin-bottom:var(--spacing-xs);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.item-card-snippet{font-size:var(--font-size-xs);color:var(--color-text-secondary);line-height:1.5;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:var(--spacing-sm)}.item-card-meta{display:flex;align-items:center;justify-content:space-between;font-size:var(--font-size-xs);color:var(--color-text-muted);margin-bottom:var(--spacing-sm)}.item-card-source{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60%}.item-card-timestamp{white-space:nowrap}.item-card-tags{display:flex;flex-wrap:wrap;gap:var(--spacing-xs)}.category-badge{display:inline-flex;align-items:center;gap:2px;padding:2px var(--spacing-sm);border-radius:var(--radius-sm);font-size:var(--font-size-xs);font-weight:500;line-height:1.4;white-space:nowrap}.category-badge-hash{opacity:.7}@media (max-width: 1023px){.dashboard-sidebar{transform:translate(-100%)}.dashboard-sidebar.sidebar-open{transform:translate(0)}.dashboard-main{margin-left:0}.sidebar-toggle{display:block}}@media (min-width: 1024px){.sidebar-toggle{display:none}}.sidebar-toggle{background:none;border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-xs) var(--spacing-sm);color:var(--color-text-secondary);font-size:var(--font-size-lg);cursor:pointer}.sidebar-toggle:hover{color:var(--color-text-primary);border-color:var(--color-border-hover)}.sidebar-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background-color:#00000080;z-index:99}@media (max-width: 1023px){.sidebar-overlay.sidebar-open{display:block}}