:root{--primary-color: #6366f1;--primary-hover: #4f46e5;--bg-color: #f8fafc;--card-bg: #ffffff;--text-main: #0f172a;--text-muted: #64748b;--border-color: #e2e8f0;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--radius: 12px}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:var(--bg-color);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}h1,h2,h3,h4,h5,h6,p{margin:0}input,button{font-family:inherit}.app-container{max-width:800px;margin:0 auto;padding:2rem 1rem}.header{text-align:center;margin-bottom:3rem}.header h1{font-size:2.5rem;font-weight:800;color:var(--primary-color);letter-spacing:-.025em;margin-bottom:.5rem}.header p{color:var(--text-muted);font-size:1.125rem}.share-section,.subscribe-section{background:var(--card-bg);padding:1.5rem;border-radius:var(--radius);box-shadow:var(--shadow-md);margin-bottom:2rem;border:1px solid var(--border-color)}.section-title{font-size:1.25rem;font-weight:600;margin-bottom:1rem;color:var(--text-main)}.input-group{display:flex;gap:.5rem;margin-bottom:1rem}.input-group:last-child{margin-bottom:0}input[type=text],input[type=email],input[type=password]{flex:1;padding:.75rem 1rem;border:1px solid var(--border-color);border-radius:8px;font-size:1rem;transition:all .2s;outline:none}input[type=text]:focus,input[type=email]:focus,input[type=password]:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #6366f133}button{padding:.75rem 1.5rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:500;cursor:pointer;transition:background-color .2s,transform .1s}button:hover{background-color:var(--primary-hover)}button:active{transform:translateY(1px)}button:disabled{background-color:var(--text-muted);cursor:not-allowed}.feed-section{display:flex;flex-direction:column;gap:1.5rem}.article-card{background:var(--card-bg);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow-sm);border:1px solid var(--border-color);transition:box-shadow .2s,transform .2s}.article-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.article-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.75rem}.article-title{font-size:1.25rem;font-weight:700;color:var(--text-main);text-decoration:none}.article-title:hover{text-decoration:underline;color:var(--primary-color)}.article-badge{background-color:var(--bg-color);color:var(--text-muted);padding:.25rem .5rem;border-radius:4px;font-size:.75rem;border:1px solid var(--border-color);margin-left:.5rem}.article-summary{color:var(--text-muted);line-height:1.6;margin-bottom:1rem;font-size:.95rem}.article-footer{display:flex;align-items:center;gap:1rem;border-top:1px solid var(--border-color);padding-top:1rem}.action-btn{background:none;border:none;color:var(--text-muted);font-weight:600;font-size:.875rem;cursor:pointer;display:flex;align-items:center;gap:.25rem;padding:0}.action-btn:hover{color:var(--primary-color);background:none}.action-btn:active{transform:none}.comments-section{margin-top:1rem;background-color:var(--bg-color);border-radius:8px;padding:1rem}.comment-list{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1rem;max-height:200px;overflow-y:auto}.comment-item{background:var(--card-bg);padding:.75rem;border-radius:6px;border:1px solid var(--border-color);font-size:.875rem;color:var(--text-main)}.comment-form{display:flex;gap:.5rem}.alert{padding:1rem;border-radius:8px;margin-bottom:1rem;text-align:center}.alert-success{background-color:#dcfce7;color:#166534;border:1px solid #bbf7d0}.alert-error{background-color:#fee2e2;color:#991b1b;border:1px solid #fecaca}