:root {
            /* Dark Theme Variables */
            --bg: #050a14;
            --sidebar-bg: #070d1a;
            --card-bg: #0d1424;
            --topbar: rgba(5, 10, 20, 0.85);
            --border: rgba(255, 255, 255, 0.08);
            --text-main: #ffffff;
            --text-muted: #94a3b8;
            --accent: #e3d5c1;
            --accent-hover: #d1c0a8;
            --shadow: 0 12px 40px rgba(0,0,0,0.5);
            --input-bg: #02060e;
            --glass: rgba(255, 255, 255, 0.03);
        }

        [data-theme="light"] {
            --bg: #f3f4f6;
            --sidebar-bg: #ffffff;
            --card-bg: #ffffff;
            --topbar: rgba(243, 244, 246, 0.85);
            --border: rgba(0, 0, 0, 0.08);
            --text-main: #0f172a;
            --text-muted: #64748b;
            --accent: #4a3f35;
            --accent-hover: #2d261f;
            --shadow: 0 4px 30px rgba(0,0,0,0.06);
            --input-bg: #ffffff;
            --glass: rgba(0, 0, 0, 0.02);
        }

        * { box-sizing: border-box; margin: 0; padding: 0; transition: background 0.25s ease, border 0.2s; }
        body { font-family: 'Plus Jakarta Sans', sans-serif; background-color: var(--bg); color: var(--text-main); }

        /* --- Animations --- */
        @keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
        .page-animate { animation: slideUp 0.5s cubic-bezier(0.23, 1, 0.32, 1) forwards; }

        /* --- Modern Auth Screen --- */
        #auth-overlay { 
            position: fixed; inset: 0; background: radial-gradient(circle at top left, #1e293b, #020617); 
            z-index: 2000; display: flex; align-items: center; justify-content: center;
        }
        [data-theme="light"] #auth-overlay { background: radial-gradient(circle at top left, #e2e8f0, #f8fafc); }
        
        .auth-box { 
            background: rgba(255,255,255,0.05); backdrop-filter: blur(20px);
            padding: 50px; border-radius: 32px; width: 450px; text-align: center;
            border: 1px solid rgba(255,255,255,0.1); box-shadow: var(--shadow);
        }

        /* --- Layout --- */
        .top-nav {
            position: fixed; top: 0; left: 280px; right: 0; height: 75px; 
            background: var(--topbar); backdrop-filter: blur(15px);
            border-bottom: 1px solid var(--border); display: flex; align-items: center; 
            padding: 0 40px; justify-content: space-between; z-index: 100;
        }
        .sidebar {
            width: 280px; height: 100vh; position: fixed; left: 0; top: 0; 
            background: var(--sidebar-bg); border-right: 1px solid var(--border);
            padding: 30px; display: flex; flex-direction: column; gap: 35px; z-index: 150;
        }
        .main-container { margin-left: 280px; padding-top: 110px; padding-bottom: 50px; display: flex; flex-direction: column; align-items: center; }

        /* --- Logo --- */
        .logo-container { display: flex; align-items: center; gap: 14px; font-weight: 800; font-size: 1.7rem; color: var(--text-main); }
        .logo-box { width: 38px; height: 38px; background: var(--accent); border-radius: 10px; display: flex; align-items: center; justify-content: center; transform: rotate(-8deg); }

        /* --- Buttons --- */
        .btn-main {
            background: var(--accent); color: var(--bg); border: none; padding: 14px 28px; 
            border-radius: 16px; font-weight: 700; cursor: pointer; display: flex; align-items: center; gap: 10px; justify-content: center;
        }
        .btn-main:hover { transform: translateY(-2px); filter: brightness(1.1); box-shadow: 0 8px 20px rgba(0,0,0,0.2); }

        .nav-link { 
            color: var(--text-muted); text-decoration: none; padding: 14px 18px; border-radius: 16px; 
            display: flex; align-items: center; gap: 14px; cursor: pointer; font-weight: 500;
        }
        .nav-link.active { background: var(--accent); color: var(--bg); }

        /* --- Enhanced Post Container --- */
        .post-card { 
            background: var(--card-bg); border-radius: 28px; padding: 25px; width: 100%; 
            max-width: 650px; border: 1px solid var(--border); box-shadow: var(--shadow); margin-bottom: 30px; 
        }
        .post-author-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
        .author-meta { display: flex; align-items: center; gap: 12px; }
        .post-title { font-size: 1.4rem; font-weight: 700; margin-bottom: 12px; line-height: 1.3; }
        .post-body { color: var(--text-muted); line-height: 1.6; font-size: 1.05rem; margin-bottom: 15px; }

        /* --- Icon Action Bar --- */
        .action-bar { 
            display: flex; align-items: center; gap: 5px; margin-top: 20px; 
            padding-top: 15px; border-top: 1px solid var(--border); 
        }
        .action-btn { 
            display: flex; align-items: center; gap: 8px; padding: 8px 15px; 
            border-radius: 12px; cursor: pointer; color: var(--text-muted); 
            font-size: 0.9rem; font-weight: 600;
        }
        .action-btn:hover { background: var(--glass); color: var(--text-main); }
        .action-btn svg { width: 20px; height: 20px; stroke: currentColor; stroke-width: 2; fill: none; }

        /* --- Comments System --- */
        .comment-box { margin-top: 20px; background: var(--glass); border-radius: 18px; padding: 15px; display: none; }
        .comment-item { padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
        .comment-input { margin-top: 10px; background: var(--bg); border: 1px solid var(--border); border-radius: 12px; color: var(--text-main); padding: 10px 15px; width: 100%; outline: none; }

        /* --- Utility --- */
        .hidden { display: none !important; }
        input, textarea, select { width: 100%; background: var(--input-bg); border: 1px solid var(--border); border-radius: 14px; padding: 16px; color: var(--text-main); outline: none; margin-bottom: 20px; font-family: inherit; }
        
        .cat-chip { background: var(--card-bg); padding: 10px 20px; border-radius: 25px; font-size: 0.9rem; border: 1px solid var(--border); cursor: pointer; white-space: nowrap; font-weight: 600; }
        .cat-chip.active { background: var(--accent); color: var(--bg); border-color: var(--accent); }