:root{--color-primary: #0077cc;--color-primary-dark: #005fa3;--color-bg: #f5f7fb;--color-sidebar-bg: #1e2a38;--color-sidebar-hover: #324a5f;--color-text: #2c3e50;--radius: 10px;--shadow: 0 2px 8px rgba(0, 0, 0, .1)}.app-container{display:flex;min-height:100vh;font-family:Inter,system-ui,sans-serif;background:var(--color-bg)}.sidebar{width:240px;background:var(--color-sidebar-bg);color:#fff;padding:1.5rem 1rem;display:flex;flex-direction:column;box-shadow:var(--shadow)}.sidebar h2{font-size:1.4rem;margin-bottom:1.5rem;text-align:center;color:#fff}.sidebar ul{list-style:none;padding:0;margin:0;flex:1}.sidebar li{margin-bottom:.75rem}.sidebar a{color:#fff;text-decoration:none;display:block;padding:.6rem 1rem;border-radius:var(--radius);transition:background .2s ease}.sidebar a:hover{background:var(--color-sidebar-hover)}.main-content{flex:1;padding:2rem 3rem;overflow-y:auto}.blog-table-container{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem;max-width:100%;overflow-x:auto}.blog-table-container h2{margin-bottom:1rem;color:var(--color-text);font-size:1.4rem;text-align:center}.blog-table{width:100%;border-collapse:collapse}.blog-table th,.blog-table td{padding:.75rem 1rem;border-bottom:1px solid #eee;text-align:left;font-size:.95rem}.blog-table th{background:#f9fafc;font-weight:600;color:#555}.blog-table tr:hover{background-color:#f5f9ff}button{cursor:pointer;padding:.4rem .8rem;border-radius:var(--radius);border:none;font-size:.9rem;transition:background .3s ease}.edit-btn{background-color:#4caf50;color:#fff;margin-right:.4rem}.edit-btn:hover{background-color:#43a047}.blog-manager{display:flex;flex-direction:column;gap:1.5rem}.blog-manager .header{display:flex;justify-content:space-between;align-items:center}.blog-manager .header h1{color:var(--color-text);font-size:1.8rem;margin:0}.blog-manager .btn-primary{background-color:var(--color-primary);color:#fff;border:none;padding:.6rem 1.2rem;border-radius:var(--radius);cursor:pointer;font-weight:500;transition:background .3s ease;text-decoration:none}.blog-manager .btn-primary:hover{background-color:var(--color-primary-dark)}.blog-form{background:#fff;padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow);max-width:600px;margin:2rem auto;display:flex;flex-direction:column;gap:1rem}.blog-form h2{color:var(--color-text);text-align:center;font-size:1.5rem}.blog-form label{font-weight:600;color:#333}.blog-form input[type=text],.blog-form textarea{padding:.6rem;border:1px solid #ddd;border-radius:var(--radius);width:100%;font-size:1rem}.blog-form textarea{resize:vertical}.blog-form input[type=file]{margin-top:.4rem}.blog-form .checkbox{display:flex;align-items:center;gap:.5rem}.blog-form button{background:var(--color-primary);color:#fff;border:none;padding:.75rem;border-radius:var(--radius);cursor:pointer;font-weight:500;transition:background .3s ease}.blog-form button:hover{background:var(--color-primary-dark)}.blog-form .error{color:red;text-align:center;font-size:.9rem}.message-table-container{background:#fff;border-radius:12px;box-shadow:0 2px 8px #0000001a;padding:1.5rem;max-width:100%;overflow-x:auto}.message-table-container h2{text-align:center;color:#2c3e50;margin-bottom:1rem}.message-table{width:100%;border-collapse:collapse}.message-table th,.message-table td{padding:.75rem 1rem;border-bottom:1px solid #eee;text-align:left;font-size:.95rem}.message-table th{background-color:#f9fafc;font-weight:600;color:#555}.message-table tr:hover{background-color:#f5f9ff}.message-preview{max-width:300px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.read{background-color:#f9f9f9;color:#888}button{cursor:pointer;padding:.4rem .8rem;border-radius:6px;border:none;font-size:.9rem;margin-right:.5rem}.mark-btn{background-color:#07c;color:#fff}.mark-btn:hover{background-color:#005fa3}.delete-btn{background-color:#e74c3c;color:#fff}.error{color:red;text-align:center;margin-top:1rem}.message-table tr{cursor:pointer;transition:background .2s ease}.message-table tr:hover{background-color:#e9f3ff}.message-table tr.read:hover{background-color:#f1f1f1}.messages-manager{display:flex;flex-direction:column;gap:1.5rem}.messages-manager .header{text-align:center}.messages-manager h1{color:#2c3e50;font-size:1.8rem;margin-bottom:.5rem}.message-detail{max-width:700px;margin:2rem auto;background:#fff;padding:2rem;border-radius:12px;box-shadow:0 2px 8px #0000001a}.back-btn{background:none;border:none;color:#07c;font-weight:600;cursor:pointer;margin-bottom:1rem}.back-btn:hover{text-decoration:underline}.message-card h2{color:#2c3e50;margin-bottom:.5rem}.message-card p{line-height:1.5}.message-card hr{margin:1rem 0;border:0;border-top:1px solid #ddd}.message-body{white-space:pre-wrap;font-size:1rem;color:#333}.actions{text-align:right;margin-top:1rem}.delete-btn{background-color:#e74c3c;color:#fff;border:none;padding:.6rem 1.2rem;border-radius:6px;cursor:pointer}.delete-btn:hover{background-color:#c0392b}