:root{--bg-primary:#f8fafc;--bg-secondary:#fff;--bg-sidebar:#0f172a;--text-primary:#1e293b;--text-secondary:#64748b;--text-inverse:#f8fafc;--text-inverse-sec:#cbd5e1;--accent-primary:#2563eb;--accent-hover:#1d4ed8;--accent-soft:#dbeafe;--border-light:#e2e8f0;--border-dark:#334155;--sidebar-width:280px;--border-radius:8px;--border-radius-lg:16px;--transition-speed:.2s;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a}@media (prefers-color-scheme:dark){:root{--bg-primary:#020617;--bg-secondary:#0f172a;--text-primary:#f8fafc;--text-secondary:#94a3b8;--border-light:#1e293b}}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);height:100vh;font-family:Inter,-apple-system,sans-serif;line-height:1.5;overflow:hidden}.overlay{background:var(--bg-primary);z-index:1000;transition:opacity var(--transition-speed);justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.overlay.hidden{opacity:0;pointer-events:none}.auth-card{background:var(--bg-secondary);border-radius:var(--border-radius-lg);box-shadow:var(--shadow-lg);text-align:center;width:90%;max-width:400px;padding:3rem}.auth-card h1{margin-bottom:.5rem;font-size:1.875rem;font-weight:700}.auth-card p{color:var(--text-secondary);margin-bottom:2rem}.app-container{opacity:1;width:100vw;height:100vh;transition:opacity var(--transition-speed);display:flex}.app-container.hidden{opacity:0}.sidebar{width:var(--sidebar-width);background-color:var(--bg-sidebar);color:var(--text-inverse);border-right:1px solid var(--border-dark);flex-direction:column;height:100%;display:flex}.sidebar-header{border-bottom:1px solid var(--border-dark);justify-content:space-between;align-items:center;padding:1.5rem;display:flex}.sidebar-header h2{font-size:1.125rem;font-weight:600}.icon-btn,#add-feed-btn{color:var(--text-inverse-sec);cursor:pointer;transition:background var(--transition-speed), color var(--transition-speed);background:0 0;border:none;border-radius:4px;padding:.25rem}.icon-btn:hover,#add-feed-btn:hover{color:var(--text-inverse);background:#ffffff1a}.icon-btn svg,#add-feed-btn svg{width:20px;height:20px}.add-feed-form{background:#0003;flex-direction:column;gap:.5rem;padding:1rem;display:flex}.add-feed-form.hidden{display:none}.add-feed-form input{border:1px solid var(--border-dark);border-radius:var(--border-radius);background:var(--bg-sidebar);color:var(--text-inverse);outline:none;padding:.5rem}.add-feed-form input:focus{border-color:var(--accent-primary)}.add-feed-form button{background:var(--accent-primary);color:#fff;border-radius:var(--border-radius);cursor:pointer;border:none;padding:.5rem;font-weight:500}.add-feed-form button:hover{background:var(--accent-hover)}.feed-list{flex-grow:1;padding:1rem 0;overflow-y:auto}.feed-list ul{list-style:none}.feed-list li{cursor:pointer;color:var(--text-inverse-sec);transition:background var(--transition-speed);align-items:center;gap:.75rem;padding:.5rem 1.5rem;display:flex}.feed-list li:hover{color:var(--text-inverse);background:#ffffff0d}.feed-list li.active{color:var(--accent-soft);border-right:3px solid var(--accent-primary);background:#ffffff1a;font-weight:500}.feed-icon{border-radius:2px;width:16px;height:16px}.sidebar-footer{border-top:1px solid var(--border-dark);justify-content:space-between;align-items:center;padding:1rem 1.5rem;display:flex}.user-profile{align-items:center;gap:.5rem;display:flex}.user-profile img{border:1px solid var(--border-dark);border-radius:50%;width:32px;height:32px}.user-profile span{color:var(--text-inverse-sec);font-size:.875rem;font-weight:500}#signout-btn{color:var(--text-inverse-sec);cursor:pointer;background:0 0;border:none;font-size:.75rem}#signout-btn:hover{color:var(--text-inverse);text-decoration:underline}.main-content{background-color:var(--bg-primary);flex-direction:column;flex-grow:1;display:flex;overflow:hidden}.main-header{background-color:var(--bg-secondary);border-bottom:1px solid var(--border-light);box-shadow:var(--shadow-sm);z-index:10;justify-content:space-between;align-items:center;padding:1.5rem 2rem;display:flex}.main-header h1{color:var(--text-primary);font-size:1.5rem;font-weight:700}.main-header .header-actions{align-items:center;gap:1rem;display:flex}.layout-select{background:var(--bg-primary);color:var(--text-primary);border:1px solid var(--border-light);border-radius:var(--border-radius);cursor:pointer;outline:none;padding:.25rem .5rem;font-family:inherit;font-size:.875rem}.layout-select:focus{border-color:var(--accent-primary)}.main-header .icon-btn{color:var(--text-secondary)}.main-header .icon-btn:hover{color:var(--accent-primary);background:var(--accent-soft)}.article-grid{flex-grow:1;align-content:start;gap:1.5rem;padding:2rem;display:grid;overflow-y:auto}.article-grid[data-layout=grid]{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}.article-grid[data-layout=title-only]{flex-direction:column;gap:0;padding:0;display:flex}.article-grid[data-layout=title-only] .article-card{border:none;border-bottom:1px solid var(--border-light);min-height:auto;box-shadow:none;border-radius:0;flex-direction:row;align-items:center;padding:.75rem 2rem}.article-grid[data-layout=title-only] .article-thumb,.article-grid[data-layout=title-only] .article-snippet{display:none}.article-grid[data-layout=title-only] .article-card-content{flex-direction:row;align-items:center;gap:1rem;width:100%;padding:0}.article-grid[data-layout=title-only] .article-source{flex-shrink:0;width:120px;margin:0}.article-grid[data-layout=title-only] .article-title{white-space:nowrap;text-overflow:ellipsis;-webkit-line-clamp:1;line-clamp:1;flex-grow:1;margin:0;font-size:1rem;font-weight:500}.article-grid[data-layout=title-only] .article-meta{border:none;flex-shrink:0;justify-content:flex-end;gap:1rem;width:180px;padding:0}.article-grid[data-layout=magazine]{flex-direction:column;gap:1rem;max-width:800px;margin:0 auto;display:flex}.article-grid[data-layout=magazine] .article-card{flex-direction:row;min-height:160px}.article-grid[data-layout=magazine] .article-thumb{width:200px;height:auto}.article-grid[data-layout=magazine] .article-card-content{justify-content:center}.article-card{background:var(--bg-secondary);border-radius:var(--border-radius);border:1px solid var(--border-light);box-shadow:var(--shadow-sm);transition:transform var(--transition-speed), box-shadow var(--transition-speed);cursor:pointer;flex-direction:column;min-height:250px;display:flex;overflow:hidden}.article-card:hover,.article-card.selected{box-shadow:var(--shadow-md);border-color:var(--accent-primary);transform:translateY(-2px)}.article-card.selected{outline:2px solid var(--accent-primary);outline-offset:2px}.article-card.read .article-title{color:var(--text-secondary);font-weight:500}.article-card.read .article-thumb,.article-card.read .article-snippet{opacity:.7}.article-thumb{object-fit:cover;background-color:var(--border-light);width:100%;height:160px}.article-card-content{flex-direction:column;flex-grow:1;padding:1rem;display:flex}.article-source{color:var(--accent-primary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:.25rem;font-size:.75rem;font-weight:600}.article-title{-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;margin-bottom:.5rem;font-size:1.125rem;font-weight:600;line-height:1.3;display:-webkit-box;overflow:hidden}.article-snippet{color:var(--text-secondary);-webkit-line-clamp:3;line-clamp:3;-webkit-box-orient:vertical;flex-grow:1;margin-bottom:1rem;font-size:.875rem;line-height:1.4;display:-webkit-box;overflow:hidden}.article-meta{color:var(--text-secondary);border-top:1px solid var(--border-light);justify-content:space-between;padding-top:.75rem;font-size:.75rem;display:flex}.reading-overlay{width:calc(100% - var(--sidebar-width));background:var(--bg-primary);z-index:50;height:100%;transition:transform .3s cubic-bezier(.4,0,.2,1);position:absolute;top:0;right:0;transform:translate(100%);box-shadow:-4px 0 15px #0000000d}.reading-overlay.open{transform:translate(0)}.reading-content{max-width:800px;height:100%;margin:0 auto;padding:3rem 4rem;position:relative;overflow-y:auto}.close-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;font-size:2rem;line-height:1;position:absolute;top:1.5rem;right:2rem}.close-btn:hover{color:var(--text-primary)}#reading-title{color:var(--text-primary);margin-bottom:1rem;font-size:2.5rem;font-weight:800;line-height:1.2}.reading-meta{color:var(--text-secondary);border-bottom:1px solid var(--border-light);margin-bottom:2rem;padding-bottom:1rem;font-size:.875rem}.reading-meta a{color:var(--accent-primary);text-decoration:none}.reading-meta a:hover{text-decoration:underline}.article-body{color:var(--text-primary);font-size:1.125rem;line-height:1.8}.article-body p{margin-bottom:1.5rem}.article-body img{border-radius:var(--border-radius);max-width:100%;height:auto;margin:1rem 0}.article-body iframe{aspect-ratio:16/9;border-radius:var(--border-radius);border:none;width:100%;margin:1.5rem 0}.article-body a{color:var(--accent-primary)}.loader{border:3px solid #0000001a;border-top:3px solid var(--accent-primary);border-radius:50%;width:24px;height:24px;margin:2rem auto;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}