:root {
            --bg-color: #0f172a;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --accent: #6366f1;
            --card-bg: #1e293b;
            --border: #334155;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }
        
        body { 
            background-color: var(--bg-color); 
            color: var(--text-main); 
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }

        .container {
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 50px 40px;
            max-width: 550px;
            width: 100%;
            text-align: center;
            box-shadow: 0 20px 40px rgba(0,0,0,0.5);
        }

        .icon {
            font-size: 56px;
            margin-bottom: 20px;
        }

        .date-badge {
            display: inline-block;
            background: rgba(99, 102, 241, 0.15);
            color: var(--accent);
            border: 1px solid var(--accent);
            padding: 8px 18px;
            border-radius: 30px;
            font-weight: 800;
            font-size: 14px;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        h1 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 15px;
        }

        p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.6;
            margin-bottom: 35px;
        }

        .back-btn {
            display: inline-block;
            background-color: var(--accent);
            color: white;
            padding: 14px 28px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            transition: background-color 0.3s, transform 0.2s;
        }

        .back-btn:hover {
            background-color: #4f46e5;
            transform: translateY(-2px);
        }