:root {
            --primary-color: #6c63ff;
            --success-color: #00d26a;
            --bg-color: #0f172a;
            --card-bg: #1e293b;
            --text-color: #e2e8f0;
            --border-color: #334155;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-color);
            line-height: 1.6;
        }

        /* Navbar */
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 50px;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(15px);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            box-sizing: border-box;
        }

        .logo { display: flex; align-items: center; gap: 15px; font-size: 1.5rem; font-weight: bold; color: white; text-decoration: none; }
        .logo img { height: 50px; width: auto; object-fit: contain; }
        .nav-links a { color: #94a3b8; text-decoration: none; margin-left: 20px; font-weight: 500; transition: color 0.3s; }
        .nav-links a:hover { color: var(--primary-color); }

        /* --- İÇERİK ALANI --- */
        .container {
            max-width: 1000px;
            margin: 120px auto 50px auto;
            padding: 0 20px;
        }

        .topic-header {
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 20px;
            margin-bottom: 30px;
        }

        .topic-title { font-size: 2rem; margin: 0 0 10px 0; color: white; }
        .topic-meta { color: #94a3b8; font-size: 0.9rem; }
        
        /* Etiket stili  */
        .tag-question { 
            background-color: rgba(255, 255, 255, 0.1); 
            color: #cbd5e1; 
            border: 1px solid #cbd5e1; 
            padding: 3px 8px; 
            border-radius: 5px; 
            font-size: 0.8rem; 
            font-weight: bold; 
            vertical-align: middle; 
            margin-right: 10px; 
        }

        .post {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 15px;
            padding: 25px;
            margin-bottom: 25px;
            display: flex;
            gap: 20px;
        }

        .user-sidebar { text-align: center; min-width: 100px; }
        .avatar { width: 60px; height: 60px; border-radius: 50%; background-color: #475569; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; font-weight: bold; margin: 0 auto 10px auto; color: white; }
        .username { font-weight: bold; color: var(--primary-color); display: block; }
        .user-role { font-size: 0.8rem; color: #94a3b8; }

        .post-content { flex: 1; }
        .post-text { color: #e2e8f0; font-size: 1rem; white-space: pre-wrap; }
        .post-date { font-size: 0.8rem; color: #64748b; margin-bottom: 10px; display: block; }

        code { background-color: #0f172a; padding: 2px 6px; border-radius: 4px; font-family: monospace; color: #fcd535; }
        pre { background-color: #0f172a; padding: 15px; border-radius: 8px; overflow-x: auto; border: 1px solid #334155; }
        pre code { background-color: transparent; padding: 0; color: #e2e8f0; }

        /* BOŞ DURUM MESAJI */
        .empty-state {
            text-align: center;
            padding: 40px;
            color: #64748b;
            font-style: italic;
            border: 2px dashed #334155;
            border-radius: 15px;
            margin-bottom: 30px;
        }

        .reply-area {
            background-color: var(--card-bg);
            padding: 30px;
            border-radius: 15px;
            border-top: 3px solid var(--primary-color);
            margin-top: 20px;
        }
        
        .reply-area h3 { margin-top: 0; color: white; }

        textarea {
            width: 100%;
            height: 150px;
            background-color: rgba(0,0,0,0.3);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 15px;
            color: white;
            font-family: inherit;
            resize: vertical;
            box-sizing: border-box;
            margin-bottom: 20px;
        }
        textarea:focus { outline: none; border-color: var(--primary-color); }

        .btn-reply {
            background-color: var(--primary-color);
            color: white;
            padding: 12px 30px;
            border: none;
            border-radius: 50px;
            font-weight: bold;
            cursor: pointer;
            font-size: 1rem;
            transition: transform 0.2s;
        }
        .btn-reply:hover { transform: scale(1.05); }